自动化 外文翻译 文献综述 温度传感器
传感器技术论文中英文对照资料外文翻译文献
传感器技术论文中英文对照资料外文翻译文献Development of New Sensor TechnologiesSensors are devices that can convert physical。
chemical。
logical quantities。
etc。
into electrical signals。
The output signals can take different forms。
such as voltage。
current。
frequency。
pulse。
etc。
and can meet the requirements of n n。
processing。
recording。
display。
and control。
They are indispensable components in automatic n systems and automatic control systems。
If computers are compared to brains。
then sensors are like the five senses。
Sensors can correctly sense the measured quantity and convert it into a corresponding output。
playing a decisive role in the quality of the system。
The higher the degree of n。
the higher the requirements for sensors。
In today's n age。
the n industry includes three parts: sensing technology。
n technology。
and computer technology。
自动化专业英语原文和翻译
自动化专业英语原文和翻译引言概述：自动化专业是一门涉及自动控制系统和自动化设备的学科，它主要研究如何利用现代科技手段实现生产和工程过程的自动化。
在学习和研究自动化专业时，了解并掌握相关的英语术语和表达是非常重要的。
本文将介绍一些自动化专业常见的英语原文和翻译，以帮助读者更好地理解和运用这些术语。
一、传感器与测量（Sensors and Measurements）1.1 传感器类型（Types of Sensors）- 温度传感器（Temperature Sensor）：用于测量环境或物体的温度。
- 压力传感器（Pressure Sensor）：用于测量液体或气体的压力。
- 光电传感器（Photoelectric Sensor）：用于检测光的存在或光的强度。
1.2 传感器原理（Principles of Sensors）- 电阻式传感器（Resistive Sensor）：利用物体电阻的变化来测量物理量。
- 压电传感器（Piezoelectric Sensor）：利用压电效应来转换压力为电信号。
- 光电传感器（Photoelectric Sensor）：利用光电效应来检测光的存在或光的强度。
1.3 传感器应用（Applications of Sensors）- 工业自动化（Industrial Automation）：传感器在工业自动化中广泛应用，用于监测和控制生产过程。
- 智能家居（Smart Home）：传感器在智能家居中用于检测环境参数，如温度、湿度和光照强度。
- 医疗设备（Medical Devices）：传感器在医疗设备中用于监测患者的生理参数，如心率和血压。
二、控制系统（Control Systems）2.1 开环控制（Open-loop Control）- 定义：开环控制是指输出信号不受反馈信号影响的控制系统。
- 特点：简单、稳定性差、无法纠正误差。
2.2 闭环控制（Closed-loop Control）- 定义：闭环控制是指输出信号受到反馈信号影响的控制系统。
关于温度传感器的文献综述
温度传感器简单概述摘要温度是表征物体冷热程度的物理量。
在工农业生产和日常生活中，对温度的测量始终占据着重要的地位。
温度传感器应用范围之广，使用数量之大，也高居各类传感器之首。
且它的发展大致经历了传统的分立式温度传感器，模拟集成温度传感器/控制器，智能温度传感器这三个阶段。
目前，温度传感器正向着单片集成化、智能化、网络化和单片系统化的方向发展。
关键词温度温度传感器传感器智能化目录摘要 (I)目录 (I)1前言 (1)2 传感器的介绍 (2)2.1传感器的概念 (2)2.2传感器的分类 (2)3 温度传感器的发展阶段 (3)3.1分立式温度传感器 (3)3.2模拟集成温度传感器 (3)3.3模拟集成温度控制器 (4)3.4智能温度传感器 (4)4 温度传感器的发展趋势 (5)5 结语 (7)参考文献 (8)1 前言蔬菜的生长与温度息息相关，对于蔬菜大棚来说，最重要的一个管理因素是温度控制。
温度太低，蔬菜就会被冻死或则停止生长，所以要将温度始终控制在适合蔬菜生长的范围内。
如果仅靠人工控制既费时费力, 效率低，又容易发生差错，为此，在现代化的蔬菜大棚管理中通常有温度自动控制系统，来监控采集大棚内各个角落的温度变化情况，以控制蔬菜大棚温度，适应生产需要。
要时刻对蔬菜大棚的温度进行测量，就离不开温度传感器。
在20世纪90年代中期最早推出的智能温度传感器，采用的是8位A/D转换器，其测温精度较低，分辨力只能达到1℃。
国外已相继推出多种高精度、高分辨力的智能温度传感器，所用的是9～12位A/D转换器，分辨力一般可达0.5 ～0.0625℃。
由美国DALLAS半导体公司新研制的 DS1624型高分辨力智能温度传感器，能输出13位二进制数据，其分辨力高达0.03125℃，测温精度为±0.2℃。
为了提高多通道智能温度传感器的转换速率，也有的芯片采用高速逐次逼近式A/D转换器。
进入21世纪后，智能温度传感器正朝着高精度、多功能、总线标准化、高可靠性及安全性、开发虚拟传感器和网络传感器、研制单片测温系统等高科技的方向迅速发展。
热电偶温度传感器中英文对照外文翻译文献
中英文对照外文翻译文献(文档含英文原文和中文翻译)外文翻译：Thermocouple Temperatur sensorIntroduction to ThermocouplesThe thermocouple is one of the simplest of all sensors. It consists of two wires of dissimilar metals joined near the measurement point. The output is a small voltage measured between the two wires.While appealingly simple in concept, the theory behind the thermocouple is subtle, the basics of which need to be understood for the most effective use of the sensor.Thermocouple theoryA thermocouple circuit has at least two junctions: the measurement junction and a reference junction. Typically, the reference junction is created where the two wires connect to the measuring device. This second junction it is really two junctions: one for each of the two wires, but because they are assumed to be at the same temperature (isothermal) they are considered as one (thermal) junction. It is the point where the metals change - from the thermocouple metals to what ever metals are used in the measuring device - typically copper.The output voltage is related to the temperature difference between the measurement and the reference junctions. This is phenomena is known as the Seebeck effect. (See the Thermocouple Calculator to get a feel for the magnitude of the Seebeck voltage). The Seebeck effect generates a small voltage along the length of a wire, and is greatest where the temperature gradient is greatest. If the circuit is of wire of identical material, then they will generate identical but opposite Seebeck voltages which will cancel. However, if the wire metals are different the Seebeck voltages will be different and will not cancel.In practice the Seebeck voltage is made up of two components: the Peltiervoltage generated at the junctions, plus the Thomson voltage generated in the wires by the temperature gradient.The Peltier voltage is proportional to the temperature of each junction while the Thomson voltage is proportional to the square of the temperature difference between the two junctions. It is the Thomson voltage that accounts for most of the observed voltage and non-linearity in thermocouple response.Each thermocouple type has its characteristic Seebeck voltage curve. The curve is dependent on the metals, their purity, their homogeneity and their crystal structure. In the case of alloys, the ratio of constituents and their distribution in the wire is also important. These potential inhomogeneous characteristics of metal are why thick wire thermocouples can be more accurate in high temperature applications, when the thermocouple metals and their impurities become more mobile by diffusion.The practical considerations of thermocouplesThe above theory of thermocouple operation has important practical implications that are well worth understanding:1. A third metal may be introduced into a thermocouple circuit and have no impact, provided that both ends are at the same temperature. This means that the thermocouple measurement junction may be soldered, brazed or welded without affecting the thermocouple's calibration, as long as there is no net temperature gradient along the third metal.Further, if the measuring circuit metal (usually copper) is different to that of the thermocouple, then provided the temperature of the two connecting terminals is the same and known, the reading will not be affected by the presence of copper.2. The thermocouple's output is generated by the temperature gradient along the wires and not at the junctions as is commonly believed. Therefore it is important that the quality of the wire be maintained where temperature gradients exists. Wire quality can be compromised by contamination from its operating environment and the insulating material. For temperatures below 400°C, contamination of insulated wires is generally not a problem. At temperatures above 1000°C, the choice of insulationand sheath materials, as well as the wire thickness, become critical to the calibration stability of the thermocouple.The fact that a thermocouple's output is not generated at the junction should redirect attention to other potential problem areas.3. The voltage generated by a thermocouple is a function of the temperature difference between the measurement and reference junctions. Traditionally the reference junction was held at 0°C by an ice bath:The ice bath is now considered impractical and is replace by a reference junction compensation arrangement. This can be accomplished by measuring the reference junction temperature with an alternate temperature sensor (typically an RTD or thermistor) and applying a correcting voltage to the measured thermocouple voltage before scaling to temperature.The correction can be done electrically in hardware or mathematically in software. The software method is preferred as it is universal to all thermocouple types (provided the characteristics are known) and it allows for the correction of the small non-linearity over the reference temperature range.4. The low-level output from thermocouples (typically 50mV full scale) requires that care be taken to avoid electrical interference from motors, power cable, transformers and radio signal pickup. Twisting the thermocouple wire pair (say 1 twist per 10 cm) can greatly reduce magnetic field pickup. Using shielded cable or running wires in metal conduit can reduce electric field pickup. The measuring device should provide signal filtering, either in hardware or by software, with strong rejection of the line frequency (50/60 Hz) and its harmonics.5. The operating environment of the thermocouple needs to be considered. Exposure to oxidizing or reducing atmospheres at high temperature can significantly degrade some thermocouples. Thermocouples containing rhodium (B,R and S types) are not suitable under neutron radiation.The advantages and disadvantages of thermocouplesBecause of their physical characteristics, thermocouples are the preferred methodof temperature measurement in many applications. They can be very rugged, are immune to shock and vibration, are useful over a wide temperature range, are simple to manufactured, require no excitation power, there is no self heating and they can be made very small. No other temperature sensor provides this degree of versatility.Thermocouples are wonderful sensors to experiment with because of their robustness, wide temperature range and unique properties.On the down side, the thermocouple produces a relative low output signal that is non-linear. These characteristics require a sensitive and stable measuring device that is able provide reference junction compensation and linearization.Also the low signal level demands that a higher level of care be taken when installing to minimise potential noise sources.The measuring hardware requires good noise rejection capability. Ground loops can be a problem with non-isolated systems, unless the common mode range and rejection is adequate.Types of thermocoupleAbout 13 'standard' thermocouple types are commonly used. Eight have been given an internationally recognised letter type designators. The letter type designator refers to the emf table, not the composition of the metals - so any thermocouple that matches the emf table within the defined tolerances may receive that table's letter designator.Some of the non-recognised thermocouples may excel in particular niche applications and have gained a degree of acceptance for this reason, as well as due to effective marketing by the alloy manufacturer. Some of these have been given letter type designators by their manufacturers that have been partially accepted by industry.Each thermocouple type has characteristics that can be matched to applications. Industry generally prefers K and N types because of their suitability to high temperatures, while others often prefer the T type due to its sensitivity, low cost and ease of use.A table of standard thermocouple types is presented below. The table also showsthe temperature range for extension grade wire in brackets.Accuracy of thermocouplesThermocouples will function over a wide temperature range - from near absolute zero to their melting point, however they are normally only characterized over their stable range. Thermocouple accuracy is a difficult subject due to a range of factors. In principal and in practice a thermocouple can achieve excellent results (that is, significantly better than the above table indicates) if calibrated, used well below its nominal upper temperature limit and if protected from harsh atmospheres. At higher temperatures it is often better to use a heavier gauge of wire in order to maintain stability (Wire Gauge below).As mentioned previously, the temperature and voltage scales were redefined in 1990. The eight main thermocouple types - B, E, J, K, N, R, S and T - were re-characterised in 1993 to reflect the scale changes. (See: NIST Monograph 175 for details). The remaining types: C, D, G, L, M, P and U appear to have been informally re-characterised.Try the thermocouple calculator. It allows you the determine the temperature by knowing the measured voltage and the reference junction temperature.Thermocouple wire gradesThere are different grades of thermocouple wire. The principal divisions are between measurement grades and extension grades. The measurement grade has the highest purity and should be used where the temperature gradient is significant. The standard measurement grade (Class 2) is most commonly used. Special measurement grades (Class 1) are available with accuracy about twice the standard measurement grades.The extension thermocouple wire grades are designed for connecting the thermocouple to the measuring device. The extension wire may be of different metals to the measurement grade, but are chosen to have a matching response over a much reduced temperature range - typically -40°C to 120°C. The reason for using extension wire is reduced cost - they can be 20% to 30% of the cost of equivalent measurementgrades. Further cost savings are possible by using thinnergauge extension wire and a lower temperature rated insulation.Note: When temperatures within the extension wire's rating are being measured, it is OK to use the extension wire for the entire circuit. This is frequently done with T type extension wire, which is accurate over the -60 to 100°C range.Thermocouple wire gaugeAt high temperatures, thermocouple wire can under go irreversible changes in the form of modified crystal structure, selective migration of alloy components and chemical changes originating from the surface metal reacting to the surrounding environment. With some types, mechanical stress and cycling can also induce changes.Increasing the diameter of the wire where it is exposed to the high temperatures can reduce the impact of these effects.The following table can be used as a very approximate guide to wire gauge:At these higher temperatures, the thermocouple wire should be protected as much as possible from hostile gases. Reducing or oxidizing gases can corrode some thermocouple wire very quickly. Remember, the purity of the thermocouple wire is most important where the temperature gradients are greatest. It is with this part of the thermocouple wiring where the most care must be taken.Other sources of wire contamination include the mineral packing material and the protective metal sheath. Metallic vapour diffusion can be significant problem at high temperatures. Platinum wires should only be used inside a nonmetallic sheath, such as high-purity alumna.Neutron radiation (as in a nuclear reactor) can have significant permanent impact on the thermocouple calibration. This is due to the transformation of metals to different elements.High temperature measurement is very difficult in some situations. In preference, use non-contact methods. However this is not always possible, as the site of temperature measurement is not always visible to these types of sensors.Colour coding of thermocouple wireThe colour coding of thermocouple wire is something of a nightmare! There are at least seven different standards. There are some inconsistencies between standards, which seem to have been designed to confuse. For example the colour red in the USA standard is always used for the negative lead, while in German and Japanese standards it is always the positive lead. The British, French and International standards avoid the use of red entirely!Thermocouple mountingThere are four common ways in which thermocouples are mounted with in a stainless steel or Inconel sheath and electrically insulated with mineral oxides. Each of the methods has its advantages and disadvantages.Sealed and Isolated from Sheath: Good relatively trouble-free arrangement. The principal reason for not using this arrangement for all applications is its sluggish response time - the typical time constant is 75 secondsSealed and Grounded to Sheath: Can cause ground loops and other noise injection, but provides a reasonable time constant (40 seconds) and a sealed enclosure.Exposed Bead: Faster response time constant (typically 15 seconds), but lacks mechanical and chemical protection, and electrical isolation from material being measured. The porous insulating mineral oxides must be sealedExposed Fast Response: Fastest response time constant, typically 2 seconds but with fine gauge of junction wire the time constant can be 10-100 ms. In addition to problems of the exposed bead type, the protruding and light construction makes the thermocouple more prone to physical damage.Thermocouple compensation and linearizationAs mentioned above, it is possible to provide reference junction compensation in hardware or in software. The principal is the same in both cases: adding a correction voltage to the thermocouple output voltage, proportional to the reference junction temperature. To this end, the connection point of the thermocouple wires to the measuring device (i.e. where the thermocouple materials change to the copper of thecircuit electronics) must be monitored by a sensor. This area must be design to be isothermal, so that the sensor accurately tracks both reference junction temperatures.The hardware solution is simple but not always as easy to implement as one might expect.The circuit needs to be designed for a specific thermocouple type and hence lacks the flexibility of the software approach.The software compensation technique simplifies the hardware requirement, by eliminating the reference sensor amplifier and summing circuit (although a multiplexer may be required).The software algorithm to process the signals needs to be carefully written. A sample algorithm details the process.A good resource for thermocouple emf tables and coefficients is at the US Commerce Dept's NIST web site. It covers the B, E, J, K, N, R, S and T types.The thermocouple as a heat pumpThe thermocouple can function in reverse. If a current is passed through a thermocouple circuit, one junction will cool and the other warm. This is known as the Peltier Effect and is used in small cooling systems. The effect can be demonstrated by alternately passing a current through a thermocouple circuit and then quickly measuring the circuit's Seebeck voltage. This process has been used, with very fine thermocouple wire (0.025 mm with about a 10 mA current), to measure humidity by ensuring the cooled junction drops below the air's dew point. This causes condensation to form on the cooled junction. The junction is allowed to return to ambient, with the temperature curve showing an inflection at the dew point caused by the latent heat of vaporization.Measuring temperature differencesThermocouples are excellent for measuring temperatures differences, such as the wet bulb depression in measuring humidity. Sensitivity can be enhanced by constructing a thermopile - a number of thermocouple circuits in series.In the above example, the thermopile output is proportional to the temperaturedifference T1 - T2, with a sensitivity three times that of a single junction pair. In practice, thermopiles with two to hundreds of junctions are used in radiometers, heat flux sensors, flow sensors and humidity sensors. The thermocouple materials can be in wire form, but also printed or etched as foils and even electroplated.An excellent example of the thermopile is in the heat flux sensors manufactured by Hukseflux Thermal Sensors. Also see RdF Corp. and Exergen Corp.The thermocouple is unique in its ability to directly measure a temperature difference. Other sensor types require a pair of closely matched sensors to ensure tracking over the entire operational temperature range.The thermoelectric generatorWhile the Seebeck voltage is very small (in the order of 10-70μV/°C), if the circuit's electrical resistance is low (thick, short wires), then large currents are possible (e.g. many amperes). An efficiency trade-off of electrical resistance (as small as possible) and thermal resistance (as large as possible) between the junctions is the major issue. Generally, electrical and thermal resistances trend together with different materials. The output voltage can be increased by wiring as a thermopile.The thermoelectric generator has found its best-known application as the power source in some spacecraft. A radioactive material, such as plutonium, generates heat and cooling is provided by heat radiation into space. Such an atomic power source can reliably provide many tens of watts of power for years. The fact that atomic generators are highly radioactive prevents their wider application.译文：热电偶温度传感器热电偶的定义热电偶是最简单的传感器之一。
自动化英文文献翻译中英文
单位代码10006学号********1毕业设计(外文翻译)学院名称自动化学院专业名称自动化学生姓名指导教师2012年6月第二章故障预测与健康管理的传感系统 (1)2.1传感器和传感原理 (1)2.1.1 热传感器 (2)2.1.2 电子传感器 (3)2.1.3 机械传感器 (4)2.1.4 湿度传感器 (5)2.1.5 生物传感器 (5)2.1.6 化学传感器 (6)2.1.7 光学传感器 (7)2.1.8 磁性传感器 (8)2.2PHM传感器系统 (9)2.2.1 待监测的参数 (11)2.2.2 传感器系统性能 (12)2.2.3 传感器系统的物理特性 (12)2.2.4 传感器系统的功能特性 (13)2.2.4.1 板载电源和电源管理 (13)2.2.4.2 板载存储器和存储器管理 (14)2.2.4.3 可编程采样模式和采样速率 (15)2.2.4.4 信号处理软件 (15)2.2.4.5 快速方便的数据传输 (16)2.2.5 成本 (18)2.2.6 可靠性 (18)2.2.7 可用性 (19)2.3传感器选择 (19)2.4实施PHM的传感器系统例子 (21)2.5PHM传感器技术的新兴趋势 (21)第二章故障预测与健康管理的传感系统数据收集是PHM的一个关键部分，通常需要利用传感系统来测量一些环境参数和运行操作参数。
这章将介绍通常的传感器和它们的传感原理。
用于PHM实现的传感器系统所必要的特征在本章会被讨论到，同时也会讲到一些最先进的传感系统。
最后，会介绍在传感系统技术中的新兴趋势。
在电子产品和电子系统中，PHM的实现有几种可用的方法，包括对即将产生的错误参数的监测和分析，比如性能参数中存在的漂移，曝光条件的利用（例如用法，温度，震动，辐射）以及把它和PoF模型结合起来计算累计损坏，并估计剩余寿命[1]。
在这些方法中，对参数的监测是最基本的一步。
为了准确的估算健康状态以及预测这个产品的剩余寿命，监测可能在产品生命周期的整个阶段都需要，包括制造，舶运，存储，管理和操作。
数字温度传感器毕业论文中英文资料外文翻译文献[管理资料]
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毕业论文中英文资料外文翻译文献外文资料DS1722 Digital ThermometerWith scientific and technological progress and development of the types of temperature sensors increasingly wide range of application of the increasingly widespread, and the beginning analog toward digital, single-bus, dual-bus and bus-3 direction. And the number of temperature sensors because they apply to all microprocessor interface consisting of automatic temperature control system simulation can be overcome sensor and microprocessor interface need signal conditioning circuit and A / D converters advant ages of the drawbacks, has been widely used in industrial control, electronic transducers, medical equipment and other temperature control system. Among them, which are more representative of a digital temperature sensor DS18B20, MAX6575, the DS1722, MAX6636 other. This paper introduces the DS1722 digital temperature sensor characteristics, the use of the method and its timing. Internal structure and other relevant content.FEATURES:Temperature measurements require no external components;Measures temperatures from -55°C to +120°C. Fahrenheit equivalent is -67°F to +248°F;Thermometer accuracy is ±°C;Thermometer resolution is configurable from 8 to 12 bits (°C to °C resolution);Data is read from/written to via a Motorola Serial Peripheral Interface (SPI) or standard 3-wire serial interface;Wide analog power supply range ( - );Separate digital supply allows for logic;Available in an 8-pin SOIC (150 mil), 8-pin USOP, and flip chip package;PIN ASSIGNMENTFIGURE 1 PIN ASSIGNMENTPIN DESCRIPTION:SERMODE - Serial Interface Mode.CE - Chip Enable.SCLK - Serial Clock.GND – Ground.VDDA - Analog Supply Voltage.SDO - Serial Data Out.SDI - Serial Data In.VDDD - Digital Supply Voltage.DESCRIPTION:The DS1722 Digital Thermometer and Thermostat with SPI/3-Wire Interface provides temperature readings which indicate the temperature of the device. No additional components are required; the device is truly a temperature-to-digital converter. Temperature readings are communicated from the DS1722 over a Motorola SPI interface or a standard 3-wire serial interface. The choice of interface standard is selectable by the user. For applications that require greater temperature resolution, the user can adjust the readout resolution from 8 to 12 bits. This is particularly useful in applications where thermal runaway conditions must be detected quickly.For application flexibility, the DS1722 features a wide analog supply rail of - . A separate digital supply allows a range of to . The DS1722 is available in an 8-pin SOIC (150-mil), 8-pin USOP, and flip chip package.Applications for the DS1722 include personal computers/servers/workstations, cellular telephones, office equipment, or any thermally-sensitive system.OVERVIEW:A block diagram of the DS1722 is shown in Figure 2. The DS1722 consists offour major components:1. Precision temperature sensor.2. Analog-to-digital converter.3. SPI/3-wire interface electronics.4. Data registers.The factory-calibrated temperature sensor requires no external components. The DS1722 is in a power conserving shutdown state upon power-up. After power-up, the user may alter the configuration register to place the device in a continuous temperature conversion mode or in a one-shot conversion mode. In the continuous conversion mode, the DS1722 continuously converts the temperature and stores the result in the temperature register. As conversions are performed in the background, reading the temperature register does not affect the conversion in progress. In the one-shot temperature conversion mode, the DS1722 will perform one temperature conversion, store the result in the temperature register, and then eturn to the shutdown state. This conversion mode is ideal for power sensitive applications. More information on the configuration register is contained in the “OPERATION-Programming”section. The temperature conversion results will have a default resolution of 9 bits. In applications where small incremental temperature changes are critical, the user can change the conversion resolution from 9 bits to 8, 10, 11, or 12. This is accomplished by programming the configuration register. Each additional bit of resolution approximately doubles the conversion time. The DS1722 can communicate using either a Motorola Serial Peripheral Interface (SPI) or standard 3-wire interface. The user can select either communication standard through the SERMODE pin, tying it to VDDD for SPI and to ground for 3-wire. The device contains both an analog supply voltage and a digital supply voltage (VDDA and VDDD, respectively). The analog supply powers the device for operation while the digital supply provides the top rails for the digital inputs and outputs. The DS1722 was designed to be Logic-Ready.DS1722 FUNCTIONAL BLOCK DIAGRAM Figure 2OPERATION-Measuring Temperature:The core of DS1722 functionality is its direct-to-digital temperature sensor. The DS1722 measures temperature through the use of an on-chip temperature measurement technique with an operating range from -55°to +120°C. The device powers up in a power-conserving shutdown mode. After power-up, the DS1722 may be placed in a continuous conversion mode or in a one-shot conversion mode. In the continuous conversion mode, the device continuously computes the temperature and stores the most recent result in the temperature register at addresses 01h (LSB) and 02h (MSB). In the one-shot conversion mode, the DS1722 performs one temperature conversion and then returns to the shutdown mode, storing temperature in the temperature register. Details on how to change the setting after power up are contained in the “OPERATION-Programming”section. The resolution of the temperature conversion is configurable (8, 9, 10, 11, or 12 bits), with 9-bit readings the default state. This equates to a temperature resolution of °C, °C, °C, °C, or °C. Following each conversion, thermal data is stored in the thermometer register in two’s complement format; the information can be retrieved over the SPI or 3-wire interface with the address set to the temperature register, 01h (LSB) and then 02h (MSB). Table 2 describesthe exact relationship of output data to measured temperature. The table assumes the DS1722 is configured for 12-bit resolution; if the evince is configured in a lower resolution mode, those bits will contain 0s. The data is transmitted serially over the digital interface, MSB first for SPI communication and LSB first for 3-wire communication. The MSB of the temperature register contains the “sign” (S) bit, denoting whether the temperature is positive or negative. For Fahrenheit usage, a lookup table or conversion routine must be used.AddressLocation S 2625242322212002h MSB (unit = ℃) LSB2-12-22-32-40 0 0 0 01hTEMPERATURE DIGITAL OUTPUT(BINARY) DIGITAL OUTPUT(HEX)+120℃0111 1000 0000 0000 7800h+ 0001 1001 0001 0000 1910h+ 0000 1010 0010 0000 0a20h+ 0000 0000 1000 0000 0080h0 0000 0000 0000 0000 0000h1111 1111 1000 0000 Ff80h1111 0101 1110 0000 F5e0h1110 0110 1111 0000 E6f0h-55 1100 1001 0000 0000 C900h OPERATION-Programming:The area of interest in programming the DS1722 is the Configuration register. All programming is done via the SPI or 3-wire communication interface by selecting the appropriate address of the desired register location. Table 3 illustrates the addresses for the two registers (configuration and temperature) of the DS1722.Register Address Structure Table 3CONFIGURATION REGISTER PROGRAMMING:The configuration register is accessed in the DS1722 with the 00h address for reads and the 80h address for writes. Data is read from or written to the configuration register MSB first for SPI communication and LSB first for 3-wire communication. The format of the register is illustrated in Figure 2. The effect each bit has on DS1722 functionality is described below along with the power-up state of the bit. The entire register is volatile, and thus it will power-up in the default state.CONFIGURATION/STATUS REGISTER Figure 21SHOT = One-shot temperature conversion bit. If the SD bit is "1", (continuous temperature conversions are not taking place), a "1" written to the 1SHOT bit will cause the DS1722 to perform one temperature conversion and store the results in the temperature register at addresses 01h (LSB) and 02h (MSB). The bit will clear itself to "0" upon completion of the temperature conversion. The user has read/write access to the 1SHOT bit, although writes to this bit will be ignored if the SD bit is a "0", (continuous conversion mode). The power-up default of the one-shot bit is "0".R0, R1, R2 = Thermometer resolution bits. Table 4 below defines the resolution of the digital thermometer, based on the settings of these 3 bits. There is a direct tradeoff between resolution and conversion time, as depicted in the AC Electrical Characteristics. The user has read/write access to the R2, R1 and R0 bits and the power-up default state is R2="0", R1="0", and R0="1" (9-bit conversions).THERMOMETER RESOLUTION CONFIGURATION Table 4SD = Shutdown bit. If SD is "0", the DS1722 will continuously perform temperature conversions and store the last completed result in the temperature register. If SD is changed to a "1", the conversion in progress will be completed and stored and then the device will revert to a low-power shutdown mode. The communication port remains active. The user has read/write access to the SD bit and the power-up default is "1" (shutdown mode).SERIAL INTERFACE:The DS1722 offers the flexibility to choose between two serial interface modes. The DS1722 can communicate with the SPI interface or with a standard 3-wire interface. The interface method used is determined by the SERMODE pin. When this pin is connected to VDDD SPI communication is selected. When this pin is connected to ground, standard 3-wire communication is selected.SERIAL PERIPHERAL INTERFACE (SPI):The serial peripheral interface (SPI) is a synchronous bus for address and data transfer. The SPI mode of serial communication is selected by tying the SERMODE pin to VDDD. Four pins are used for the SPI. The four pins are the SDO (Serial Data Out), SDI (Serial Data In), CE (Chip Enable), and SCLK (Serial Clock). The DS1722 is the slave device in an SPI application, with the microcontroller being the master. The SDI and SDO pins are the serial data input and output pins for the DS1722, respectively. The CE input is used to initiate and terminate a data transfer. The SCLK pin is used to synchronize data movement between the master (microcontroller) and the slave (DS1722) devices. The shift clock (SCLK), which is generated by the microcontroller, is active only when CE is high and during address and data transfer to any device on the SPI bus. The inactive clock polarity is programmable in somemicrocontrollers. The DS1722 offers an important feature in that the level of the inactive clock is determined by sampling SCLK when CE becomes active. Therefore, either SCLK polarity can be accommodated. There is one clock for each bit transferred. Address and data bits are transferred in groups of eight, MSB first.3-WIRE SERIAL DATA BUS:The 3-wire communication mode operates similar to the SPI mode. However, in 3-wire mode, there is one bi-directional I/O instead of separate data in and data out signals. The 3-wire consists of the I/O (SDI and SDO pins tied together), CE, and SCLK pins. In 3-wire mode, each byte is shifted in LSB first unlike SPI mode where each byte is shifted in MSB first. As is the case with the SPI mode, an address byte is written to the device followed by a single data byte or multiple data bytes.外文资料译文DS1722数字温度传感器随着科学技术的不断进步和发展，温度传感器的种类日益繁多，应用逐渐广泛，并且开始由模拟式向着数字式、单总线式、双总线式和三总线式发展。
传感器温湿度测量中英文资料外文翻译文献
中英文资料外文翻译文献SHT11/71传感器的温湿度测量Assist.Prof.Grish Spasov,PhD,BSc Nikolay KakanakovDepartment of Computer Systems,Technical University-branch Plovdiv,25,”Tzanko Djustabanov”Str.,4000Plovdiv,Bulgaria,+35932659576, E-mail:gvs@tu-plovdiv.bg,kakanak@tu-plovdiv.bg 关键词：温湿度测量，智能传感器，分布式自动测控这篇论文阐述了智能传感器的优点，介绍了SHT11/71温湿度传感器（产自盛世瑞公司）。
该传感器是一种理想的对嵌入式系统提供环境测量参数的传感器。
常规的应用时将SHT11/71放于实际的工作环境当中。
应用于分布式的温湿度监测系统。
使用单片机与集成网络服务器来实现对传感器的信息交流与关系。
这个应用是可实现与测试的。
1.介绍温湿度的测量控制对于电器在工业、科学、医疗保健、农业和工艺控制过程都有着显著地意义。
温湿度这两种环境参数互相影响，因为这至关重要的一点，在一些应用中他们是必须并联测量的。
SHT11/71是利用现代技术把温度、湿度测量元件、放大器、A/D转换器、数字接口、校验CRC计算逻辑记忆模块和核心芯片集成到一个非常小的尺寸上[1][3]。
采用这种智能传感器可以缩短产品开发时间和成本。
整合入传感器模数转换和放大器的芯片使开发人员能够优化传感器精度和长期问的的元素。
并不是全结合形式的数字逻辑接口连通性管理的传感器。
这些优点可以减少整体上市时间，甚至价格[1][3]。
本文以SHT11/71（产自盛世瑞公司）智能传感器为例，介绍他的优势和测量程序给出一个实用实例来说明该工作的实现条件。
这个应用时可行可测试的。
2.智能传感器——SHT11/71SHT11/71是一个继承了温度和湿度组建，以及一个多元化校准数字器的芯片。
自动化专业外文文献
Development of Sensor New TechnologySensor is one kind component which can transform the physical quantity, chemistry quantity and the biomass into electrical signal. The output signal has the different forms like the voltage, the electric current, the frequency, the pulse and so on, which can satisfy the signal transmission, processing, recording, and demonstration and control demands. So it is the automatic detection system and in the automatic control industry .If automatic Technology is used wider, then sensor is more important.Several key words of the sensor：1 Sensor ElementsAlthough there are exception ,most sensor consist of a sensing element and a conversion or control element. For example, diaphragms,bellows,strain tubes and rings, bourdon tubes, and cantilevers are sensing elements which respond to changes in pressure or force and convert these physical quantities into a displacement. This displacement may then be used to change an electrical parameter such as voltage, resistance, capacitance, or inductance. Such combination of mechanical and electrical elements form electromechanical transducing devices or sensor. Similar combination can be made for other energy input such as thermal. Photo, magnetic and chemical,giving thermoelectric, photoelectric,electromaanetic, and electrochemical sensor respectively.2 Sensor SensitivityThe relationship between the measured and the sensor output signal is usually obtained by calibration tests and is referred to as the sensor sensitivity K1= output-signal increment / measured increment . In practice, the sensor sensitivity is usually known, and, by measuring the output signal, the input quantity is determined from input= output-signal increment / K1.3 Characteristics of an Ideal SensorThe high sensor should exhibit the following characteristics.ahigh fidelity-the sensor output waveform shape be a faithful reproduction of the measured; there should be minimum distortion.bThere should be minimum interference with the quantity being measured; the presence of the sensor should not alter the measured in any way.cSize. The sensor must be capable of being placed exactly where it is needed.dThere should be a linear relationship between the measured and the sensor signal. eThe sensor should have minimum sensitivity to external effects, pressure sensor,for example,are often subjected to external effects such vibration and temperature.fThe natural frequency of the sensor should be well separated from the frequency and harmonics of the measurand.Sensors can be divided into the following categories：1 Electrical SensorElectrical sensor exhibit many of the ideal characteristics. In addition they offer high sensitivity as well as promoting the possible of remote indication or mesdurement.Electrical sensor can be divided into two distinct groups:avariable-control-parameter types,which include:iresistanceiicapacitanceiiiinductanceivmutual-inductance typesThese sensor all rely on external excitation voltage for their operation.bself-generating types,which includeielectromagneticiithermoelectriciiiphotoemissiveivpiezo-electric typesThese all themselves produce an output voltage in response to the measurand input and their effects are reversible. For example, a piezo-electric sensor normally produces an output voltage in response to the deformation of a crystalline material; however, if an alternating voltage is applied across the material, the sensor exhibits the reversible effect by deforming or vibrating at the frequency of the alternating voltage.2 Resistance SensorResistance sensor may be divided into two groups, as follows:iThose which experience a large resistance change, measured by using potential-divider methods. Potentiometers are in this group.iiThose which experience a small resistance change, measured by bridge-circuit methods. Examples of this group include strain gauges and resistance thermometers.3 Capacitive SensorThe capacitance can thus made to vary by changing either the relative permittivity, the effective area, or the distance separating the plates. The characteristic curves indicate that variations of area and relative permittivity give a linear relationship only over a small range of spacings. Thus the sensitivity is high for small values of d. Unlike the potentionmeter, the variable-distance capacitive sensor has an infinite resolution making it most suitable for measuring small increments of displacement or quantities which may be changed to produce a displacement.4 Inductive SensorThe inductance can thus be made to vary by changing the reluctance of the inductive circuit.Measuring techniques used with capacitive and inductive sensor:aA.C. excited bridges using differential capacitors inductors.bA.C. potentiometer circuits for dynamic measurements.cD.C. circuits to give a voltage proportional to velocity for a capacitor. dFrequency-modulation methods, where the change of C or L varies the frequency of an oscillation circuit.Important features of capacitive and inductive sensor are as follows:iresolution infiniteiiaccuracy±0.1% of full scale is quotediiidisplacement ranges 2510-6 m to 10-3mivrise time less than 50us possibleTypical measurands are displacement, pressure, vibration, sound, and liquid level.5 Linear Variable-differential Ttransformer6 Piezo-electric Sensor7 Electromagnetic Sensor8 Thermoelectric Sensor9 Photoelectric Cells10 Mechanical Sensor and Sensing ElementsIn information age, the information industry includes information gathering, transmission, process three parts, namely sensor technology, communication, computer technology. Because of ultra large scale integrated circuit’s rapid development after having been developed Modern computer technology and communication, not only requests sensor precision reliability, speed ofresponse and gain information content request more and more high but also requests its cost to be inexpensive. The obvious traditional sensor is eliminated gradually because of the function, the characteristic, the volume, the cost and so on. As world develop many countries are speeding up to the sensor new technology’s research and the development, and all has obtained the enormous breakthrough. Now the sensor new technology development mainly has following several aspects:Using the physical phenomenon, the chemical reaction, the biological effect as the sensor principle therefore the researches which discovered the new phenomenon and the new effect are the sensor technological improving ways .it is important studies to developed new sensor’s the foundation. Japanese Sharp Corporation uses the superconductivity technology to develop successfully the high temperature superconductivity magnetic sensor and get the sensor technology significant breakthrough. Its sensitivity is so high and only inferior in the superconductivity quantum interference component. Its manufacture craft is far simpler than the superconductivity quantum interference component. May use in magnetism image formation technology. So it has the widespread promoted value.Using the immune body and the antigen meets one another compound when the electrode surface. It can cause the electrode potential change and use this phenomenon to be possible to generate the immunity sensor. The immunity sensor makes with this kind of immune body may to some organism in whether has this kind of ant original work inspection. Like may inspect somebody with the hepatitis virus immune body whether contracts the hepatitis, plays to is fast, the accurate role. The US UC sixth branch has developed this kind of sensor.The sensor material is the important foundation for sensor technology, because the materials science is progressive and the people may make each kind of new sensor For example making the temperature sensor with the high polymer thin film; The optical fiber can make the pressure, the current capacity, the temperature, the displacement and so on the many kinds of sensors; Making the pressure transmitter with the ceramics. The high polymer can become the proportion adsorption and the release hydrogen along with the environment relative humidity size. The high polymer electricity lies betweenthe constant to be small, the hydrogen can enhance the polymer the coefficient of dialectical loss. Making the capacitor the high polymer dielectric medium, determines the electric capacity cape city the change, then obtains the relative humidity. Making the plasma using this principle to gather the legitimate polystyrene film temperature sensor below, it has the characteristic.Measured the wet scope is wide; The temperature range is wide, may reach -400 ℃ ~ +1,500 ℃; The speed of response is quick, is smaller than 1S; The size is small, may use in the small space measuring wet; The temperature coefficient is small.The ceramic electric capacity type pressure transmitter is one kind does not have the intermediary fluid the dry type pressure transmitter. Uses the advanced ceramic technology, the heavy film electronic technology, its technical performance is stable, the year drifting quantity is smaller than 0.1%F.S, warm floats is smaller than ±0.15%/10K, anti- overloads strongly, may reach the measuring range several hundred times. The survey scope may from 0 to 60mpa.German E+H Corporation and the American Kahlo Corporation product is at the leading position.The optical fiber application is send the material significant breakthrough, its uses in most early the optical communication techniques. In the optical communication use discovered works as environmental condition change and so on the temperature, pres-sure, electric field, magnetic field, causes the fiber optic transmission light wave intensity, the phase, the frequency, change and so on the polarization condition, the survey light wave quantity change, may know causes these light wave physical quantity the and so on quantitative change temperature, pressure ,electric field, magnetic field size, uses these principles to be possible to develop the optical fiber sensor. The optical fiber sensor and the traditional sensor compare has many characteristics: Sensitivity high, the structure simple, the volume small, anti-corrosive, the electric insulation good, the path of rays may be curving, be advantageous for the realization telemeter and so on. Optical fiber sensor Japan is in the advanced level. Like Idec Izumi Corporation and Sun x Corporation. The optical fiber send receiver and the integrated path of rays technology unify, accelerates the optical fiber sensor technology development. Will integrate the path of ray’s component to replace the original optics part and the passive light component;enable the optical fiber sensor to have the high band width, the low signal processing voltage, the reliability high, the cost will be low.In semiconductor technology processing method oxygenation, the photo etc hang, the proliferation, the deposition, the plane electron craft, various guides corrosion and steams plates, the sputtering thin film and so on, these have all introduced to the sensor manufacture. Thus has produced each kind of new sensor, like makes the silicon micro sensor using the semiconductor technology, makes the fast response using the thin film craft the gas to be sensitive, the wet sensitive sensor, the use sputtering thin film craft system pressure transmitter and so on..The Japanese horizontal river company uses various guides’ corrosion technology to carry on the high accuracy three dimensional processing; the system helps the silicon resonance type pressure transmitter. The core partially presses two resonant Liang by the feeling which above the silicon diaphragm and the silicon diaphragm manufactures to form, two resonant Liang's frequency difference correspondence different pressure, measures the pressure with the frequency difference method, may eliminate the error which factor and so on ambient temperature brings. When ambient temperature change, two resonant Liang frequencies and the amplitude variation are same, after two frequency differences, its same change quantity can counterbalance mutually. It’s survey most high accuracy may reach 0.01%FS.American Silicon Microstructure Inc.SMI the company develops a series of low ends, linear in 0.1% to 0.In 65% scope silicon micro pressure transmitter, the lowest full measuring range is 0.15psi 1KPa, it makes take the silicon as the material, has the unique three dimensional structure, the light slight machine-finishing, makes the wheat stone bridge many times with the etching on the silicon diaphragm, when above silicon chip stress, it has the distortion, the resistance produces presses the anti- effect but to lose the bridge balance, the output and the pressure becomes the proportion the electrical signal.Such silicon micro sensor is the front technology which now the sensor develops, Its essential feature is the sensitive unit volume is a micron magnitude, Is the traditional sensor several dozens, several 1%. In aspect and so on industry control, aerospace domain, biomedicine has the vital role, like on the airplane the use may reduce the airplane weight, reduces the energy.Another characteristic is can be sensitive is small surveyed, may make the blood pressure pressure transmitter.The Chinese aviation main corporation Beijing observation and control technical research institute, the development CYJ series splashes thanks the membrane pressure transmitter is uses the ion sputtering craft to process the metal strain gauge, it has over come the nonmetallic strain gauge easily the temperature influence insufficiency, has the high stability, is suitable in each kind of situation, is measured the medium scope widely, but also overcame the tradition lowly to glue the precision which the type brought, sluggish big, shortcoming and so on slow change, had the precision high, the re-liability is high, the volume small characteristic, widely used in domain and so on aviation, petroleum, chemical industry, medical service.Integrates the sensor the superiority is the traditional sensor is unable to achieve, it is a simple sensor not merely, it in at the same time the auxiliary circuit part and send the part will integrate on together the chip, will caus e it to have the calibration, to compensate, from the diagnosis and the network correspondence function, it might reduce the cost, the gain in yield, this kind of blood pressure sensor which American LUCAS, NOVASENSOR Corporation will develop, each week will be able to produce 10,000.The intellectualized sensor is one kind of belt microprocessor sensor, is achievement which the microcomputer and the sensor unifies, it has at the same time the examination, the judgment and the information processing function, compares with the traditional sensor has very many characteristics: Has the judgment and the information processing function, can carry on the revision, the error to the observed value compensates, thus enhancement measuring accuracy; May realize the multi-sensor multi parameters survey; Has from the diagnosis and from the calibration function, enhances the reliability; The survey data may deposit and withdraw, easy to operate; Has the data communication interface, can and the microcomputer direct communication.The sensor, the signal adjustment electric circuit, the monolithic integrated circuit integration forms ultra large-scale integrated on a chip the senior intelligence sensor. American HONY WELL Corporation ST-3000 intelligence sensor, the chip size only then has 3×4×2mm3, uses the semiconductor craft,makes CPU, EPROM, the static pressure, the differential pressure, the temperature on the identical chip and so on three kind of sensitive units.The intellectualized sensor research and the development, US is at the leading position. American Space Agency when development spaceship called this kind of sensor for the clever sensor Smart Sensor, on the spaceship this kind of sensor is extremely important. Our country in this aspect research and development also very backward mainly is because our country semiconductor integrated circuit technological level is limited.The sensor’s development is changing day after day since especially the 80's humanities have entered into the high industrialization the information age, sensor techno-logy to renewal, higher technological development. US, Japan and so on developed country sensor technological development quickest, our country because the foundation is weak, the sensor technology compares with these developed countries has the big disparity. Therefore, we should enlarge to the sensor engineering research, the development investment, causes our country sensor technology and the foreign disparity reduces, promotes our country instrument measuring appliance industry and from the technical development.——FromSensor Technology Handbook,Jon Wilson,Newnes传感器新技术的发展传感器是一种能将物理量、化学量、生物量等转换成电信号的器件;输出信号有不同形式,如电压、电流、频率、脉冲等,能满足信息传输、处理、记录、显示、控制要求,是自动检测系统和自动控制系统中不可缺少的元件;如果把计算机比作大脑,那么传感器则相当于五官,传感器能正确感受被测量并转换成相应输出量,对系统的质量起决定性作用;自动化程度越高,系统对传感器要求越高;传感器的几个关键词：1传感器元件除特例外,大多数的传感器都由敏感元件、转换元件或控制元件组成;如振动膜、波纹管、应力管和应力环、低音管和悬臂都是敏感元件,它们对压力和力作出响应把物理量转变成位移;然后位移可以改变电参数,如电压、电阻、电容或者感应系数;机械式和电子式元件合并形成机电式传感设备或传感器;这样的组合可用来输入能量信号;热的,光的,磁的和化学的相互结合产生的热电式、光电式、电磁式和电化学式传感器;2 传感器灵敏度通过校正测量系统获得的被测物理量和传感器输出信号的关系叫做传感器灵敏度K1,也就是K1=输出信号增量/测量增量;实际中,传感器的灵敏度是已知的,并且通过测量输出信号,输入量由下式决定,输入量=输出信号增量/K1;3 理想传感器的特性a高保真性：传感器输出波形应该真实可靠地再现被测量,并且失真很小;b可测量最小的干扰,任何时候传感器的出现不能改变被测量;c尺寸：传感器必须能正确地放在所需的地方;d被测量和传感器信号之间应该有一个线性关系;e传感器对外部影响的灵敏度应该小,例如压力传感器经常受到外部振动和温度的影响;f传感器的固有频率应该避开被测量的频率和谐波;传感器可分为以下几类：1 电传感器电传感器具有许多理想特性;它们不仅实现远程测量和显示,还能提供高灵敏度; 电传感器可分为两大类;a变参数型,包括：i电阻式；ii电容式；iii自感应式；v互感应式；这些传感器的工作依靠外部电压;b自激型,包括：i电磁式；ii热电式；iii光栅式；iv压电式;这些传感器根据测量输入值产生输出电压,而且这一过程是可逆的;比如,在一般情况下,压电式传感器可根据晶体材料的变形产生一个输出电压；但是,如果在材料上施加一个可变电压,传感器可以通过变形或与变电压同频率的振动来体现可逆效应;2 电阻式传感器电阻式传感器可以分为两大类：i那些表现为大电阻变化的物理量可通过分压方式进行测量,电位器就属于此类; ii那些表现为小电阻变化的物理量可通过桥电路方式进行测量,这一类包括应变仪和电阻温度计;3 电容式传感器电容量随着相对介电常数、截面面积、或者极板间的距离的变化而变化;电容的特征曲线表明,在空间的一段范围内,截面面积和相对介电常数的变化与电容量变化成线性关系;不象电位器,变极距型电容传感器有无限的分辨率,这最适合测量微小的位移增量的位移;4 电感式传感器电感可以通过改变电感电路的阻抗来调节;电容式和电感式传感器的测量技术：a用差分式电容或电感作为交流电桥；b用交流电位计电路做动态测量；c用直流电路为电容器提供正比于容值变化的电压；d采用调频法,C或者L随着振荡电路频率的变化而改变;电容式和电感式传感器的一些重要特性如下：i分辨率无限ii精确到满量程的±0.1%iii位移范围从2510-6m到10-3miv上升时间小于50us典型的被测量是位移、压力、振动量、声音和液位;5 线性调压器6 压电式传感器7 电磁式传感器8 热电式传感器9 光电管10 机械式传感器及敏感元件在今天的信息时代里,信息产业包括信息采集、传输、处理三部分,即传感技术、通信技术、计算机技术;现代的计算机技术和通信技术由于超大规模集成电路的飞速发展,而已经充分发达后,不仅对传感器的精度、可靠性、响应速度、获取的信息量要求越来越高,还要求其成本低廉且使用方便;显然传统传感器因功能、特性、体积、成本等已难以满足而逐渐被淘汰;世界许多发达国家都在加快对传感器新技术的研究与开发,并且都已取得极大的突破;如今传感器新技术的发展,主要有以下几个方面：利用物理现象、化学反应、生物效应作为传感器原理,所以研究发现新现象与新效应是传感器技术发展的重要工作,是研究开发新型传感器的基础;日本夏普公司利用超导技术研制成功高温超导磁性传感器,是传感器技术的重大突破,其灵敏度高,仅次于超导量子干涉器件;它的制造工艺远比超导量子干涉器件简单;可用于磁成像技术,有广泛推广价值;利用抗体和抗原在电极表面上相遇复合时,会引起电极电位的变化,利用这一现象可制出免疫传感器;用这种抗体制成的免疫传感器可对某生物体内是否有这种抗原作检查;如用肝炎病毒抗体可检查某人是否患有肝炎,起到快速、准确作用;美国加州大学巳研制出这类传感器;传感器材料是传感器技术的重要基础,由于材料科学进步,人们可制造出各种新型传感器;例如用高分子聚合物薄膜制成温度传感器；光导纤维能制成压力、流量、温度、位移等多种传感器；用陶瓷制成压力传感器;高分子聚合物能随周围环境的相对湿度大小成比例地吸附和释放水分子;高分子电介常数小,水分子能提高聚合物的介电常数;将高分子电介质做成电容器,测定电容容量的变化,即可得出相对湿度;利用这个原理制成等离子聚合法聚苯乙烯薄膜温度传感器,其有以下特点：测湿范围宽；温度范围宽,可达-400℃～+1500℃；响应速度快,小于1S；尺寸小,可用于小空间测试；温度系数小;陶瓷电容式压力传感器是一种无中介液的干式压力传感器;采用先进的陶瓷技术和厚膜电子技术,其技术性能稳定,年漂移量小于0.1%F.S,温漂小于±0.15%/10K,抗过载强,可达量程的数百倍;测量范围可从0到60Mpa;德国E+H 公司和美国Kahlo公司产品处于领先地位;光导纤维的应用是传感材料的重大突破,其最早用于光通信技术;在光通信利用中发现当温度、压力、电场、磁场等环境条件变化时,引起光纤传输的光波强度、相位、频率、偏振态等变化,测量光波量的变化,就可知道导致这些光波量变化的温度、压力、电场、磁场等物理量的大小,利用这些原理可研制出光导纤维传感器;光纤传感器与传统传感器相比有许多特点：灵敏度高,结构简单、体积小、耐腐蚀、电绝缘性好、光路可弯曲、便于实现遥测等;光纤传感器日本处于先进水平;如IdecIzumi公司和Suns公司;光纤传感受器与集成光路技术相结合,加速光纤传感器技术的发展;将集成光路器件代替原有光学元件和无源光器件,使光纤传感器有高的带宽、低的信号处理电压,可靠性高,成本低;半导体技术中的加工方法有氧化、光刻、扩散、沉积、平面电子工艺,各向导性腐蚀及蒸镀,溅射薄膜等,这些都已引进到传感器制造;因而产生了各种新型传感器,如利用半导体技术制造出硅微传感器,利用薄膜工艺制造出快速响应的气敏、湿敏传感器,利用溅射薄膜工艺制压力传感器等;日本横河公司利用各向导性腐蚀技术进行高精度三维加工,制成全硅谐振式压力传感器;核心部分由感压硅膜片和硅膜片上面制作的两个谐振梁结成,两个谐振梁的频差对应不同的压力,用频率差的方法测压力,可消除环境温度等因素带来的误差;当环境温度变化时,两个谐振梁频率和幅度变化相同,将两个频率差后,其相同变化量就能够相互抵消;其测量最高精度可达0.01%FS;美国Silicon Microstructure IncSMI公司开发一系列低价位,线性度在0.1%到0.65%范围内的硅微压力传感器,最低满量程为0.15psi1KPa,其以硅为材料制成,具有独特的三维结构,轻细微机械加工,和多次蚀刻制成惠斯登电桥于硅膜片上,当硅片上方受力时,其产生变形,电阻产生压阻效应而失去电桥平衡,输出与压力成比例的电信号;象这样的硅微传感器是当今传感器发展的前沿技术,其基本特点是敏感元件体积为微米量级,是传统传感器的几十、几百分之一;在工业控制、航空航天领域、生物医学等方面有重要的作用,如飞机上利用可减轻飞机重量,减少能源;另一特点是能敏感微小被测量,可制成血压压力传感器;中国航空总公司北京测控技术研究所,研制的CYJ系列溅谢膜压力传感器是采用离子溅射工艺加工成金属应变计,它克服了非金属式应变计易受温度影响的不足,具有高稳定性,适用于各种场合,被测介质范围宽,还克服了传统粘贴式带来的精度低、迟滞大、蠕变等缺点,具有精度高、可靠性高、体积小的特点,广泛用于航空、石油、化工、医疗等领域;集成传感器的优势是传统传感器无法达到的,它不仅仅是一个简单的传感器,其将辅助电路中的元件与传感元件同时集成在一块芯片上,使之具有校准、补偿、自诊断和网络通信的功能,它可降低成本、增加产量,美国LUCAS、NOV ASENSOR公司开发的这种血压传感器,每星期能生产1万只;智能化传感器是一种带微处理器的传感器,是微型计算机和传感器相结合的成果,它兼有检测、判断和信息处理功能,与传统传感器相比有很多特点：具有判断和信息处理功能,能对测量值进行修正、误差补偿,因而提高测量精度；可实现多传感器多参数测量；有自诊断和自校准功能,提高可靠性；测量数据可存取,使用方便；有数据通信接口,能与微型计算机直接通信;把传感器、信号调节电路、单片机集成在一芯片上形成超大规模集成化的高级智能传感器;美国HONYWELL公司ST-3000型智能传感器,芯片尺寸才有3×4×2mm3,采用半导体工艺,在同一芯片上制成CPU、EPROM、静压、压差、温度等三种敏感元件;智能化传感器的研究与开发,美国处于领先地位;美国宇航局在开发宇宙飞船时称这种传感器为灵巧传感器Smart Sensor,在宇宙飞船上这种传感器是非常重要的;我国在这方面的研究与开发还很落后,主要是因为我国半导体集成电路工艺水平有限;传感器的发展日新月异,特别是80年代人类由高度工业化进入信息时代以来,传感器技术向更新、更高的技术发展;美国、日本等发达国家的传感器技术发展最快,我国由于基础薄弱,传感器技术与这些发达国家相比有较大的差距;因此,我们应该加大对传感器技术研究、开发的投入,使我国传感器技术与外国差距缩短,促进我国仪器仪表工业和自化化技术的发展;摘自——传感器技术手册,Jon Wilson,Newnes。
毕业论文外文文献翻译Sensor-technology传感器技术
毕业论文外文文献翻译Sensor-technology传感器技术毕业设计（论文）外文文献翻译文献、资料中文题目：传感器技术文献、资料英文题目：Sensor-technology文献、资料来源：文献、资料发表（出版）日期：院（部）：专业：班级：姓名：学号：指导教师：翻译日期： 2017.02.14Sensor technologyA sensor is a device which produces a signal in response to its detecting or measuring a property ,such as position , force , torque , pressure , temperature , humidity , speed , acceleration , or vibration .Traditionally ,sensors (such as actuators and switches )have been used to set limits on the performance of machines .Common examples are (a) stops on machine tools to restrict work table movements ,(b) pressure and temperature gages with automatics shut-off features , and (c) governors on engines to prevent excessive speed of operation . Sensor technology has become an important aspect of manufacturing processes and systems .It is essential for proper data acquisition and for the monitoring , communication , and computer control of machines and systems .Because they convert one quantity to another , sensors often are referred to as transducers .Analog sensors produce a signal ,such as voltage ,which is proportional to the measured quantity .Digital sensors have numeric or digital outputs that can be transferred to computers directly .Analog-to-coverter(ADC) is available for interfacing analog sensors with computers .Classifications of SensorsSensors that are of interest in manufacturing may be classified generally as follows:Machanical sensors measure such as quantities aspositions ,shape ,velocity ,force ,torque , pressure , vibration , strain , and mass .Electrical sensors measure voltage , current , charge , and conductivity .Magnetic sensors measure magnetic field ,flux , and permeablity .Thermal sensors measure temperature , flux ,conductivity , and special heat .Other types are acoustic , ultrasonic , chemical , optical , radiation , laser ,and fiber-optic .Depending on its application , a sensor may consist of metallic , nonmetallic , organic , or inorganic materials , as well as fluids ,gases ,plasmas , or semiconductors .Using the special characteristics of these materials , sensors covert the quantity or property measured to analog or digital output. The operation of an ordinary mercury thermometer , for example , is based on the difference between the thermal expansion of mercury and that of glass.Similarly , a machine part , a physical obstruction , or barrier in a space can be detected by breaking the beam of light when sensed by a photoelectric cell . A proximity sensor ( which senses and measures the distance between it and an object or a movingmember of a machine ) can be based on acoustics , magnetism , capacitance , or optics . Other actuators contact the object and take appropriate action ( usually by electromechanical means ) . Sensors are essential to the conduct of intelligent robots , and are being developed with capabilities that resemble those of humans ( smart sensors , see the following ).This is America, the development of such a surgery Lin Bai an example, through the screen, through a remote control operator to control another manipulator, through the realization of the right abdominal surgery A few years ago our country the exhibition, the United States has been successful in achieving the right to the heart valve surgery and bypass surgery. This robot has in the area, caused a great sensation, but also, AESOP's surgical robot, In fact, it through some equipment to some of the lesions inspections, through a manipulator can be achieved on some parts of the operation Also including remotely operated manipulator, and many doctors are able to participate in the robot under surgery Robot doctor to include doctors with pliers, tweezers or a knife to replace the nurses, while lighting automatically to the doctor's movements linked, the doctor hands off, lighting went off, This is very good, a doctor's assistant.Tactile sensing is the continuous of variable contact forces , commonly by an array of sensors . Such a system is capable of performing within an arbitrarythree-dimensional space .has gradually shifted from manufacturing tonon-manufacturing and service industries, we are talking about the car manufacturer belonging to the manufacturing industry, However, the services sector including cleaning, refueling, rescue, rescue, relief, etc. These belong to the non-manufacturing industries and service industries, so here is compared with the industrial robot, it is a very important difference. It is primarily a mobile platform, it can move to sports, there are some arms operate, also installed some as a force sensor and visual sensors, ultrasonic ranging sensors, etc. It’s surrounding environment for the conduct of identification, to determine its campaign to complete some work, this is service robot’s one of the basic characteristicsIn visual sensing (machine vision , computer vision ) , cameral optically sense the presence and shape of the object . A microprocessor then processes the image ( usually in less than one second ) , the image is measured , and the measurements are digitized ( image recognition ) .Machine vision is suitable particularly for inaccessible parts , in hostile manufacturing environments , for measuring a large number of small features , and in situations where physics contact with the part may cause damage .Small sensors have the capability to perform a logic function , to conducttwo-way communication , and to make a decisions and take appropriate actions . The necessary input and the knowledge required to make a decision can be built into a smart sensor . For example , a computer chip with sensors can be programmed to turn a machine tool off when a cutting tool fails . Likewise , a smart sensor can stop a mobile robot or a robot arm from accidentally coming in contact with an object or people by using quantities such as distance , heat , and noise .Sensor fusion . Sensor fusion basically involves the integration of multiple sensors in such a manner where the individual data from each of the sensors ( such as force , vibration ,temperature , and dimensions ) are combined to provide a higher level of information and reliability . A common application of sensor fusion occurs when someone drinks a cup of hot coffee . Although we take such a quotidian event for granted ,it readily can be seen that this process involves data input from the person's eyes , lips , tongue , and hands .Through our basic senses of sight , hearing , smell , taste , and touch , there is real-time monitoring of relative movements , positions , and temperatures . Thus if the coffee is too hot , the hand movement of the cup toward the lip is controlled and adjusted accordingly .。
传感器 外文翻译 外文文献 英文文献 分布是温度传感器
Distributed Temperature SensorIn the human living environment, temperature playing an extremely important role。
No matter where you live, engaged in any work, ever-present dealt with temperature under. Since the 18th century, industry since the industrial revolution to whether can master send exhibition has the absolute temperature touch. In metallurgy, steel, petrochemical, cement, glass, medicine industry and so on, can say almost eighty percent of industrial departments have to consider the factors with temperature. Temperature for industrial so important, thus promoting the development of the temperature sensor.Major general through three sensor development phase: analog integrated temperature sensor. The sensor is taken with silicon semiconductor integrated workmanship, therefore also called silicon sensor or monolithic integrated temperature sensor. Such sensing instruments have single function (only measuring temperature), temperature measurement error is smaller, price low, fast response, the transmission distance, small volume, micro-consumption electronic etc, suitable for long distance measurement temperature, temperature control, do not need to undertake nonlinear calibration, peripheral circuit is simple. It is currently the most common application at home and abroad, an integrated sensor。
DS18B20数字式温度传感器毕业论文中英文资料外文翻译文献
中英文资料外文翻译文献The introduction to The DS18B201. DESCRIPTIONThe DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line for communication with a central microprocessor. It has an operating temperature range of -55°C to +125°C and is accurate to ±0.5°C over the range of -10°C to +85°C. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HV AC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems.2.FEATURES●Unique 1-Wire® Interface Requires Only One Port Pin for Communication●Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM●Multi-drop Capability Simplifies Distributed Temperature-Sensing Applications ●Requires No External Components●Can Be Powered from Data Line; Power Supply Range is 3.0V to 5.5V1●Measures Temperatures from -55°C to +125°C (-67°F to +257°F)●±0.5°C Accuracy from -10°C to +85°C●Thermometer Resolution is User Selectable from 9 to 12 Bits●Converts Temperature to 12-Bit Digital Word in 750ms (Max)●User-Definable Nonvolatile (NV) Alarm Settings●Alarm Search Command Identifies and Addresses Devices Whose Temperature isOutside Programmed Limits●Software Compatible with the DS1822●Applications Include Thermostatic Controls, Industrial Systems, ConsumerProducts, Thermometers, or Any Thermally Sensitive System3.OVERVIEWFigure 1 shows a block diagram of the DS18B20, and pin descriptions are given in the Pin Description table. The 64-bit ROM stores the device’s unique serial code. The scratchpad memory contains the 2-byte temperature register that stores the digital output from the temperature sensor. In addition, the scratchpad provides access to the 1-byte upper and lower alarm trigger registers (TH and TL) and the 1-byte configuration register. The configuration register allows the user to set the resolution of the temperature to-digital conversion to 9, 10, 11, or 12 bits. The TH, TL, and configuration registers are nonvolatile (EEPROM), so they will retain data when the device is powered down.The DS18B20 uses Maxim’s exclusive 1-Wire bus protocol that implements bus communication using one control signal. The control line requires a weak pull up resistor since all devices are linked to the bus via a 3-state or open-drain port (the DQ pin in the case of the DS18B20). In this bus system, the microprocessor (the master device) identifies and addresses devices on the bus using each device’s unique 64-bit code. Because each device has a unique code, the number of devices that can be addressed on one DS18B20 bus is virtually unlimited. The 1-Wire bus protocol, including detailed explanations of the commands and “time slots,” is covered in the21-Wire Bus System section.Another feature of the DS18B20 is the ability to operate without an external power supply. Power is instead supplied through the 1-Wire pull up resistor via the DQ pin when the bus is high. The high bus signal also charges an internal capacitor (CPP), which then supplies power to the device when the bus is low. This method of deriving power from the 1-Wire bus is referred to as “parasite power.” As an alternative, the DS18B20 may also be powered by an external supply on VDD.Figure 1.DS18B20 Block Diagram4.OPERATION—MEASURING TEMPERATURThe core functionality of the DS18B20 is its direct-to-digital temperature sensor. The resolution of the temperature sensor is user-configurable to 9, 10, 11, or 12 bits, corresponding to increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C, respectively. The default resolution at power-up is 12-bit. The DS18B20 powers up in a low-power idle state. To initiate a temperature measurement and A-to-D conversion, the master must issue a Convert T [44h] command. Following the conversion, the resulting thermal data is stored in the 2-byte temperature register in the scratchpad memory and the DS18B20 returns to its idle state. If the DS18B20 is powered by an external supply, t he master can issue “read time slots” (see the 1-Wire Bus System section) after the Convert T command and the DS18B20 will respond by transmitting 0 while the temperature conversion is in progress and 1 when the conversion is done. If the3DS18B20 is powered with parasite power, this notification technique cannot be used since the bus must be pulled high by a strong pull up during the entire temperature conversion.The DS18B20 output temperature data is calibrated in degrees Celsius; for Fahrenheit applications, a lookup table or conversion routine must be used. The temperature data is stored as a 16-bit sign-extended two’s complement number in the temperature register (see Figure 2). The sign bits (S) indicate if the temperature is positive or negative: for positive numbers S = 0 and for negative numbers S = 1. If the DS18B20 is configured for 12-bit resolution, all bits in the temperature register will contain valid data. For 11-bit resolution, bit 0 is undefined. For 10-bit resolution, bits 1 and 0 are undefined, and for 9-bit resolution bits 2, 1, and 0 are undefined. Table 1 gives examples of digital output data and the corresponding temperature reading for 12-bit resolution conversions.5.64-BIT LASERED ROM CODEEach DS18B20 contains a unique 64–bit code (see Figure 3) stored in ROM. The least significant 8 bits of the ROM code contain the DS18B20’s 1-Wire family4code: 28h. The next 48 bits contain a unique serial number. The most significant 8 bits contain a cyclic redundancy check (CRC) byte that is calculated from the first 56 bits of the ROM code. The 64-bit ROM code and associated ROM function control logic allow the DS18B20 to operate as a 1-Wire device using the protocol detailed in the 1-Wire Bus System section.Figure 3.64-Bit Lasered ROM Code6.MEMORYThe DS18B20’s memory is organized as shown in Figure 4. The memory consists of an SRAM scratchpad with nonvolatile EEPROM storage for the high and low alarm trigger registers (TH and TL) and configuration register. Note that if the DS18B20 alarm function is not used, the TH and TL registers can serve as general-purpose memory.Byte 0 and byte 1 of the scratchpad contain the LSB and the MSB of the temperature register, respectively. These bytes are read-only. Bytes 2 and 3 provide access to TH and TL registers. Byte 4 contains the configuration register data. Bytes 5, 6, and 7 are reserved for internal use by the device and cannot be overwritten. Byte 8 of the scratchpad is read-only and contains the CRC code for bytes 0 through 7 of the scratchpad. The DS18B20 generates this CRC using the method described in the CRC Generation section.Data is written to bytes 2, 3, and 4 of the scratchpad using the Write Scratchpad [4Eh] command; the data must be transmitted to the DS18B20 starting with the least significant bit of byte 2. To verify data integrity, the scratchpad can be read (using the Read Scratchpad [BEh] command) after the data is written. When reading the scratchpad, data is transferred over the 1-Wire bus starting with the least significant bit of byte 0. To transfer the TH, TL and configuration data from the scratchpad to EEPROM, the master must issue the Copy Scratchpad [48h] command.57.CONFIGURATION REGISTERByte 4 of the scratchpad memory contains the configuration register, which is organized as illustrated in Figure 5. The user can set the conversion resolution of the DS18B20 using the R0 and R1 bits in this register as shown in Table 2. The power-up default of these bits is R0 = 1 and R1 = 1 (12-bit resolution). Note that there is a direct tradeoff between resolution and conversion time. Bit 7 and bits 0 to 4 in the configuration register are reserved for internal use by the device and cannot be overwritten.68.1-WIRE BUS SYSTEMThe 1-Wire bus system uses a single bus master to control one or more slave devices. The DS18B20 is always a slave. When there is only one slave on the bus, the system is referred to as a “single-drop” system; the system is “multi-drop” if there are multiple slaves on the bus. All data and commands are transmitted least significant bit first over the 1-Wire bus. The following discussion of the 1-Wire bus system is broken down into three topics: hardware configuration, transaction sequence, and1-Wire signaling (signal types and timing).9.TRANSACTION SEQUENCEThe transaction sequence for accessing the DS18B20 is as follows:Step 1. InitializationStep 2. ROM Command (followed by any required data exchange)Step 3. DS18B20 Function Command (followed by any required data exchange)It is very important to follow this sequence every time the DS18B20 is accessed, as the DS18B20 will not respond if any steps in the sequence are missing or out of order. Exceptions to this rule are the Search ROM [F0h] and Alarm Search [ECh] commands. After issuing either of these ROM commands, the master must return to Step 1 in the sequence.（1）INITIALIZATIONAll transactions on the 1-Wire bus begin with an initialization sequence. The initialization sequence consists of a reset pulse transmitted by the bus master followed by presence pulse(s) transmitted by the slave(s). The presence pulse lets the bus master know that slave devices (such as the DS18B20) are on the bus and are ready to operate.（2）ROM COMMANDS7After the bus master has detected a presence pulse, it can issue a ROM command. These commands operate on the unique 64-bit ROM codes of each slave device and allow the master to single out a specific device if many are present on the 1-Wire bus. These commands also allow the master to determine how many and what types of devices are present on the bus or if any device has experienced an alarm condition. There are five ROM commands, and each command is 8 bits long. The master device must issue an appropriate ROM command before issuing a DS18B20 function command.1.SEARCH ROM [F0h]When a system is initially powered up, the master must identify the ROM codes of all slave devices on the bus, which allows the master to determine the number of slaves and their device types. The master learns the ROM codes through a process of elimination that requires the master to perform a Search ROM cycle (i.e., Search ROM command followed by data exchange) as many times as necessary to identify all of the slave devices. If there is only one slave on the bus, the simpler Read ROM command can be used in place of the Search ROM process.2.READ ROM [33h]This command can only be used when there is one slave on the bus. It allows the bus master to read the slave’s 64-bit ROM code without using the Search ROM procedure. If this command is used when there is more than one slave present on the bus, a data collision will occur when all the slaves attempt to respond at the same time.3.MATCH ROM [55h]The match ROM command followed by a 64-bit ROM code sequence allows the bus master to address a specific slave device on a multi-drop or single-drop bus. Only the slave that exactly matches the 64-bit ROM code sequence will respond to the function command issued by the master; all other slaves on the bus will wait for a reset pulse.84.SKIP ROM [CCh]The master can use this command to address all devices on the bus simultaneously without sending out any ROM code information. For example, the master can make all DS18B20s on the bus perform simultaneous temperature conversions by issuing a Skip ROM command followed by a Convert T [44h] command. Note that the Read Scratchpad [BEh] command can follow the Skip ROM command only if there is a single slave device on the bus. In this case, time is saved by allowing the master to read from the slave without sending the device’s 64-bit ROM code. A Skip ROM command followed by a Read Scratchpad command will cause a data collision on the bus if there is more than one slave since multiple devices will attempt to transmit data simultaneously.5.ALARM SEARCH [ECh]The operation of this command is identical to the operation of the Search ROM command except that only slaves with a set alarm flag will respond. This command allows the master device to determine if any DS18B20s experienced an alarm condition during the most recent temperature conversion. After every Alarm Search cycle (i.e., Alarm Search command followed by data exchange), the bus master must return to Step 1 (Initialization) in the transaction sequence.（3）DS18B20 FUNCTION COMMANDSAfter the bus master has used a ROM command to address the DS18B20 with which it wishes to communicate, the master can issue one of the DS18B20 function commands. These commands allow the master to write to and read from the D S18B20’s scratchpad memory, initiate temperature conversions and determine the power supply mode.1.CONVERT T [44h]This command initiates a single temperature conversion. Following the conversion, the resulting thermal data is stored in the 2-byte temperature register in9the scratchpad memory and the DS18B20 returns to its low-power idle state. If the device is being used in parasite power mode, within 10µs (max) after this command is issued the master must enable a strong pull up on the 1-Wire bus. If the DS18B20 is powered by an external supply, the master can issue read time slots after the Convert T command and the DS18B20 will respond by transmitting a 0 while the temperature conversion is in progress and a 1 when the conversion is done. In parasite power mode this notification technique cannot be used since the bus is pulled high by the strong pull up during the conversion.2.READ SCRATCHPAD [BEh]This command allows the master to read the contents of the scratchpad. The data transfer starts with the least significant bit of byte 0 and continues through the scratchpad until the 9th byte (byte 8 – CRC) is read. The master may issue a reset to terminate reading at any time if only part of the scratchpad data is needed.3.WRITE SCRATCHPAD [4Eh]This comm and allows the master to write 3 bytes of data to the DS18B20’s scratchpad. The first data byte is written into the TH register (byte 2 of the scratchpad), the second byte is written into the TL register (byte 3), and the third byte is written into the configuration register (byte 4). Data must be transmitted least significant bit first. All three bytes MUST be written before the master issues a reset, or the data may be corrupted.4.COPY SCRATCHPAD [48h]This command copies the contents of the scratchpad TH, TL and configuration registers (bytes 2, 3 and 4) to EEPROM. If the device is being used in parasite power mode, within 10µs (max) after this command is issued the master must enable a strong pull-up on the 1-Wire bus.5.RECALL E2 [B8h]This command recalls the alarm trigger values (TH and TL) and configuration10data from EEPROM and places the data in bytes 2, 3, and 4, respectively, in the scratchpad memory. The master device can issue read time slots following the Recall E2command and the DS18B20 will indicate the status of the recall by transmitting 0 while the recall is in progress and 1 when the recall is done. The recall operation happens automatically at power-up, so valid data is available in the scratchpad as soon as power is applied to the device.6．READ POWER SUPPL Y [B4h]The master device issues this command followed by a read time slot to determine if any DS18B20s on the bus are using parasite power. During the read time slot, parasite powered DS18B20s will pull the bus low, and externally powered DS18B20s will let the bus remain high.10.WIRE SIGNALINGThe DS18B20 uses a strict 1-Wire communication protocol to ensure data integrity. Several signal types are defined by this protocol: reset pulse, presence pulse, write 0, write 1, read 0, and read 1. The bus master initiates all these signals, with the exception of the presence pulse.（1）INITIALIZATION PROCEDURE—RESET AND PRESENCE PULSES All communication with the DS18B20 begins with an initialization sequence that consists of a reset pulse from the master followed by a presence pulse from the DS18B20. This is illustrated in Figure 6. When the DS18B20 sends the presence pulse in response to the reset, it is indicating to the master that it is on the bus and ready to operate.During the initialization sequence the bus master transmits (TX) the reset pulse by pulling the 1-Wire bus low for a minimum of 480µs. The bus master then releases the bus and goes into receive mode (RX). When the bus is released, the 5kΩ pull-up resistor pulls the 1-Wire bus high. When the DS18B20 detects this rising edge, it waits 15µs to 60µs and then transmits a presence pulse by pulling the 1-Wire bus low11for 60µs to 240µs.TimingBus master pulling lowDS18B20 pulling lowResistor pullupFigure 6.Initialization Timing（2）READ/WRITE TIME SLOTSThe bus master writes data to the DS18B20 during write time slots and reads data from the DS18B20 during read time slots. One bit of data is transmitted over the 1-Wire bus per time slot.1.WRITE TIME SLOTSThere are two types of write time slots: “Write 1” time slots and “Write 0” time slots. The bus master uses a Write 1 time slot to write a logic 1 to the DS18B20 and a Write 0 time slot to write a logic 0 to the DS18B20. All write time slots must be a minimum of 60µs in duration with a minimum of a 1µs recovery time between individual write slots. Both types of write time slots are initiated by the master pulling the 1-Wire bus low (see Figure 7).To generate a Write 1 time slot, after pulling the 1-Wire bus low, the bus master must release the 1-Wirebus within 15µs. When the bus is released, the 5kΩ pull-up resistor will pull the bus high. To generate a Write 0 time slot, after pulling the 1-Wire bus low, the bus master must continue to hold the bus low for the duration of the time slot (at least 60µs).The DS18B20 samples the 1-Wire bus during a window that lasts from 15µs1213to 60µs after the master initiates the write time slot. If the bus is high during the sampling window, a 1 is written to the DS18B20. If the line is low, a 0 is written to the DS18B20.DS18B20Write Time SlotSTART OF SLOTVccBus master pulling low Resistor pullupFigure 7.DS18B20 Write Time Slot2.READ TIME SLOTSThe DS18B20 can only transmit data to the master when the master issues read time slots. Therefore, the master must generate read time slots immediately after issuing a Read Scratchpad [BEh] or Read Power Supply [B4h] command, so that the DS18B20 can provide the requested data. In addition, the master can generate read time slots after issuing Convert T [44h] or Recall E 2 [B8h] commands to find out the status of the operation.All read time slots must be a minimum of 60µs in duration with a minimum of a 1µs recovery time between slots. A read time slot is initiated by the master device pulling the 1-Wire bus low for a minimum of 1µs and then releasing the bus (see Figure 8). After the master initiates the read time slot, the DS18B20 will begin transmitting a 1 or 0 on bus. The DS18B20 transmits a 1 by leaving the bus high and transmits a 0 by pulling the bus low. When transmitting a 0, the DS18B20 will release the bus by the end of the time slot, and the bus will be pulled back to its high idle state by the pull up resister. Output data from the DS18B20 is valid for 15µs after the falling edge that initiated the read time slot. Therefore, the master must release thebus and then sample the bus state within 15µs from the start of the slot.VccBus master pulling lowResistor pullupDS18B20 pulling lowFigure 8.DS18B20 Read Time Slot1415DS18B20介绍1.说明DS18B20数字式温度传感器提供9位到12位的摄氏温度测量，并且有用户可编程的、非易失性温度上下限告警出发点。
英文文献翻译--温度传感器简单集成电路的设计
XX 大学毕业设计(论文)外文资料翻译学院：系（专业）：电子信息工程姓名：学号：外文出处：Jay Scolio，Maxim Integrated ProductsInc.(用外文写)附件：1.外文资料翻译译文；2.外文原文。
附件1：外文资料翻译译文温度传感器简单集成电路的设计当选择一个温度传感器的时候,将不再限制在模拟输出或数字输出装置。
与你系统需要相匹配的传感器类型现在有很大的选择空间。
市场上供应的所有温度感应器都是模拟输出。
热电阻， RTDs 和热电偶是另一种输出装置,矽温度感应器。
在多数的应用中，这些模拟输出装置在有效输出时需要一个比较器 , ADC, 或一个扩音器。
因此，当更高技术的集成变成可能的时候,有数字接口的温度传感器变成现实。
这些集成电路被以多种形式出售,从超过特定的温度时才有信号简单装置,到那些报告远的局部温度提供警告的装置。
现在不只是在模拟输出和数字输出传感器之间选择，还有那些应该与你的系统需要相匹配的更广阔的感应器类型的选择。
温度传感器的类型：图 1：传感器和集成电路制造商提供的四种温度传感器在图1中举例说明四种温度感应器类型。
一个理想模拟传感器提供一个完全线性的功能输出电压（A）。
在传感器(B)的数字I/O类中, 温度数据通常通过一个串行总线传给微控制器。
沿着相同的总线，数据由温度传感器传到微控制器,通常设定温度界限在引脚得数字输出将下降的时候。
当超过温度界限的时候，报警中断微控制器。
这个类型的装置也提供风扇控制。
"模拟正量"传感器(C)被应用在多种类型的数字输出上。
当超过特定温度的时候 , V OUT 对温度曲线是一个数字输出。
在这情况，增加到模拟温度传感器的"正信号"只不过是一个比较器和参考电压。
其他的类型"正信号"部分在以频率和方波的形式储存以后被延迟,这些将会在以后讨论。
系统监视器(D)是四种类型当中最复杂的集成电路。
温度传感器毕业论文中英文资料外文翻译文献
中英文翻译英文文献原文Temperature Sensor ICs Simplify DesignsWhen you set out to select a temperature sensor, you are no longer limited to either an analog output or a digital output device. There is now a broad selection of sensor types, one of which should match your system's needs.Until recently, all the temperature sensors on the market provided analog outputs. Thermistors, RTDs, and thermocouples were followed by another analog-output device, the silicon temperature sensor. In most applications, unfortunately, these analog-output devices require a comparator, an ADC, or an amplifier at their output to make them useful.Thus, when higher levels of integration became feasible, temperature sensors with digital interfaces became available. These ICs are sold in a variety of forms, from simple devices that signal when a specific temperature has been exceeded to those that report both remote and local temperatures while providing warnings at programmed temperature settings. The choice now isn't simply between analog-output and digital-output sensors; there is a broad range of sensor types from which to choose.Classes of Temperature SensorsFour temperature-sensor types are illustrated in Figure 1. An ideal analog sensor provides an output voltage that is a perfectly linear function of temperature (A). In the digital I/O class of sensor (B), temperature data in the form of multiple 1s and 0s are passed to the microcontroller, often via a serial bus. Along the same bus, data are sent to the temperature sensor from the microcontroller, usually to set the temperature limit at which the alert pin's digital output will trip. Alert interrupts the microcontroller when the temperature limit has been exceeded. This type of device can also provide fan control.Figure 1. Sensor and IC manufacturers currently offer four classes of temperature sensors."Analog-plus" sensors (C) are available with various types of digital outputs. The V OUT versus temperature curve is for an IC whose digital output switches when a specific temperaturehas been exceeded. In this case, the "plus" added to the analog temperature sensor is nothing more than a comparator and a voltage reference. Other types of "plus" parts ship temperature data in the form of the delay time after the part has been strobed, or in the form of the frequency or the period of a square wave, which will be discussed later.The system monitor (D) is the most complex IC of the four. In addition to the functions provided by the digital I/O type, this type of device commonly monitors the system supply voltages, providing an alarm when voltages rise above or sink below limits set via the I/O bus. Fan monitoring and/or control is sometimes included in this type of IC. In some cases, this class of device is used to determine whether or not a fan is working. More complex versions control the fan as a function of one or more measured temperatures. The system monitor sensor is not discussed here but is briefly mentioned to give a complete picture of the types of temperature sensors available.Analog-Output Temperature SensorsThermistors and silicon temperature sensors are widely used forms of analog-output temperature sensors. Figure 2 clearly shows that when a linear relationship between voltage and temperature is needed, a silicon temperature sensor is a far better choice than a thermistor. Over a narrow temperature range, however, thermistors can provide reasonable linearity and good sensitivity. Many circuits originally constructed with thermistors have over time been updated using silicon temperature sensors.Figure 2. The linearity of thermistors and silicon temperature sensors, two popular analog-output temperature detectors, is contrasted sharply.Silicon temperature sensors come with different output scales and offsets. Some, for example, are available with output transfer functions that are proportional to K, others to °C or °F. Some of the °C parts provide an offset so that negative temperatures can be monitored using a single-ended supply.In most applications, the output of these devices is fed into a comparator or a n A/D converter to convert the temperature data into a digital format. Despite the need for these additional devices,thermistors and silicon temperature sensors continue to enjoy popularity due to low cost and convenience of use in many situations.Digital I/O Temperature SensorsAbout five years ago, a new type of temperature sensor was introduced. These devices include a digital interface that permits communication with a microcontroller. The interface is usually an I²C or SMBus serial bus, but other serial interfaces such as SPI are common. In addition to reporting temperature readings to the microcontroller, the interface also receives instructions from the microcontroller. Those instructions are often temperature limits, which, if exceeded, activate a digital signal on the temperature sensor IC that interrupts the microcontroller. The microcontroller is then able to adjust fan speed or back off the speed of a microprocessor, for example, to keep temperature under control.This type of device is available with a wide variety of features, among them, remote temperature sensing. To enable remote sensing, most high-performance CPUs include an on-chip transistor that provides a voltage analog of the temperature. (Only one of the transistor's two p-n junctions is used.) Figure 3 shows a remote CPU being monitored using this technique. Other applications utilize a discrete transistor to perform the same function.Figure 3. A user-programmable temperature sensor monitors the temperature of a remote CPU's on-chip p-n junction.Another important feature found on some of these types of sensors (including the sensor shown in Figure 3) is the ability to interrupt a microcontroller when the measured temperature falls outside a range bounded by high and low limits. On other sensors, an interrupt is generated when the measured temperature exceeds either a high or a low temperature threshold (i.e., not both). For the sensor in Figure 3, those limits are transmitted to the temperature sensor via the SMBus interface. If the temperature moves above or below the circumscribed range, the alert signal interrupts the processor.Pictured in Figure 4 is a similar device. Instead of monitoring one p-n junction, however, it monitors four junctions and its own internal temperature. Because Maxim's MAX1668 consumes a small amount of power, its internal temperature is close to the ambient temperature. Measuring the ambient temperature gives an indication as to whether or not the system fan is operating properly.Figure 4. A user-programmable temperature sensor monitors its own local temperature and the temperatures of four remote p-n junctions.Controlling a fan while monitoring remote temperature is the chief function of the IC shown in Figure 5. Users of this part can choose between two different modes of fan control. In the PWM mode, the microcontroller controls the fan speed as a function of the measured temperature by changing the duty cycle of the signal sent to the fan. This permits the power consumption to be far less than that of the linear mode of control that this part also provides. Because some fans emit an audible sound at the frequency of the PWM signal controlling it, the linear mode can be advantageous, but at the price of higher power consumption and additional circuitry. The added power consumption is a small fraction of the power consumed by the entire system, though.Figure 5. A fan controller/temperature sensor IC uses either a PWM- or linear-mode control scheme.This IC provides the alert signal that interrupts the microcontroller when the temperature violates specified limits. A safety feature in the form of the signal called "overt" (an abbreviated version of "over temperature") is also provided. If the microcontroller or the software were to lock up while temperature is rising to a dangerous level, the alert signal would no longer be useful. However, overt, which goes active once the temperature rises above a level set via the SMBus, is typically used to control circuitry without the aid of the microcontroller. Thus, in thishigh-temperature scenario with the microcontroller not functioning, overt could be used to shutdown the system power supplies directly, without the microcontroller, and prevent a potentially catastrophic failure.This digital I/O class of devices finds widespread use in servers, battery packs, and hard-disk drives. Temperature is monitored in numerous locations to increase a server's reliability: at the motherboard (which is essentially the ambient temperature inside the chassis), inside the CPU die, and at other heat-generating components such as graphics accelerators and hard-disk drives. Battery packs incorporate temperature sensors for safety reasons and to optimize charging profiles, which maximizes battery life.There are two good reasons for monitoring the temperature of a hard-disk drive, which depends primarily on the speed of the spindle motor and the ambient temperature: The read errors in a drive increase at temperature extremes, and a hard disk's MTBF is improved significantly through temperature control. By measuring the temperature within the system, you can control motor speed to optimize reliability and performance. The drive can also be shut down. In high-end systems, alerts can be generated for the system administrator to indicate temperature extremes or situations where data loss is possible.Analog-Plus Temperature Sensors"Analog-plus" sensors are generally suited to simpler measurement applications. These ICs generate a logic output derived from the measured temperature and are distinguished from digital I/O sensors primarily because they output data on a single line, as opposed to a serial bus.In the simplest instance of an analog-plus sensor, the logic output trips when a specific temperature is exceeded. Some of these devices are tripped when temperature rises above a preset threshold, others, when temperature drops below a threshold. Some of these sensors allow the temperature threshold to be adjusted with a resistor, whereas others have fixed thresholds.The devices shown in Figure 6 are purchased with a specific internal temperature threshold. The three circuits illustrate common uses for this type of device: providing a warning, shutting down a piece of equipment, or turning on a fan.Figure 6. ICs that signal when a temperature has been exceeded are well suited forover/undertemperature alarms and simple on/off fan control.When an actual temperature reading is needed, and a microcontroller is available, sensors that transmit the reading on a single line can be useful. With the microcontroller's internal counter measuring time, the signals from this type of temperature sensor are readily transformed to a measure of temperature. The sensor in Figure 7 outputs a square wave whose frequency is proportional to the ambient temperature in Kelvin. The device in Figure 8 is similar, but the period of the square wave is proportional to the ambient temperature in kelvins.Figure 7. A temperature sensor that transmits a square wave whose frequency is proportional to the measured temperature in Kelvin forms part of a heater controller circuit.Figure 8. This temperature sensor transmits a square wave whose period is proportional to the measured temperature in Kelvin. Because only a single line is needed to send temperature information, just a single optoisolator is required to isolate the signal path.Figure 9, a truly novel approach, allows up to eight temperature sensors to be connected on this common line. The process of extracting temperature data from these sensors begins when the microcontroller's I/O port strobes all the sensors on the line simultaneously. The microcontroller is then quickly reconfigured as an input in order to receive data from each of the sensors. The data are encoded as the amount of time that transpires after the sensors are strobed. Each of the sensors encodes this time after the strobe pulse within a specific range of time. Collisions are avoided by assigning each sensor its own permissible time range.Figure 9. A microcontroller strobes up to eight temperature sensors connected on a common line and receives the temperature data transmitted from each sensor on the same line.The accuracy achieved by this method is surprisingly high: 0.8°C is typical at room temperature, precisely matching that of the IC that encodes temperature data in the form of the frequency of the transmitted square wave. The same is true of the device that uses the period of the square wave.These devices are outstanding in wire-limited applications. For example, when a temperature sensor must be isolated from the microcontroller, costs are kept to a minimum because only one optoisolator is needed. These sensors are also of great utility in automotive and HVAC applications, because they reduce the amount of copper running over distances.Anticipated Temperature Sensor DevelopmentsIC temperature sensors provide a varied array of functions and interfaces. As these devicescontinue to evolve, system designers will see more application-specific features as well as new ways of interfacing the sensors to the system. Finally, the ability of chip designers to integrate more electronics in the same die area ensures that temperature sensors will soon include new functions and special interfaces.中文翻译温度传感器芯片简化设计当选择一个温度传感器时，将不再局限于模拟输出或数字输出设备。
传感器技术论文中英文对照资料外文翻译文献
传感器技术论文中英文对照资料外文翻译文献中英文对照资料外文翻译文献附件1:外文资料翻译译文传感器新技术的发展传感器是一种能将物理量、化学量、生物量等转换成电信号的器件。
输出信号有不同形式，如电压、电流、频率、脉冲等，能满足信息传输、处理、记录、显示、控制要求，是自动检测系统和自动控制系统中不可缺少的元件。
如果把计算机比作大脑，那么传感器则相当于五官，传感器能正确感受被测量并转换成相应输出量，对系统的质量起决定性作用。
自动化程度越高，系统对传感器要求越高。
在今天的信息时代里，信息产业包括信息采集、传输、处理三部分，即传感技术、通信技术、计算机技术。
现代的计算机技术和通信技术由于超大规模集成电路的飞速发展，而已经充分发达后，不仅对传感器的精度、可靠性、响应速度、获取的信息量要求越来越高，还要求其成本低廉且使用方便。
显然传统传感器因功能、特性、体积、成本等已难以满足而逐渐被淘汰。
世界许多发达国家都在加快对传感器新技术的研究与开发，并且都已取得极大的突破。
如今传感器新技术的发展，主要有以下几个方面:利用物理现象、化学反应、生物效应作为传感器原理，所以研究发现新现象与新效应是传感器技术发展的重要工作，是研究开发新型传感器的基础。
日本夏普公司利用超导技术研制成功高温超导磁性传感器，是传感器技术的重大突破，其灵敏度高，仅次于超导量子干涉器件。
它的制造工艺远比超导量子干涉器件简单。
可用于磁成像技术，有广泛推广价值。
利用抗体和抗原在电极表面上相遇复合时，会引起电极电位的变化，利用这一现象可制出免疫传感器。
用这种抗体制成的免疫传感器可对某生物体内是否有这种抗原作检查。
如用肝炎病毒抗体可检查某人是否患有肝炎，起到快速、准确作用。
美国加州大学巳研制出这类传感器。
传感器材料是传感器技术的重要基础，由于材料科学进步，人们可制造出各种新型传感器。
例如用高分子聚合物薄膜制成温度传感器;光导纤维能制成压力、流量、温度、位移等多种传感器;用陶瓷制成压力传感器。
Research-of-Intelligent-Gas-Detecting-System温度传感器信号采集系统设计大学毕业论文外文文献翻译及原文
毕业设计（论文）外文文献翻译文献、资料中文题目：研究智能气体检测系统文献、资料英文题目：Research of Intelligent Gas DetectingSystem文献、资料来源：文献、资料发表（出版）日期：院（部）：专业：班级：姓名：学号：指导教师：翻译日期： 2017.02.14Research of Intelligent Gas Detecting System Detecting system in this paper adopts single-chip microcomputer as control computer;the overall schematic diagram of system is shown in Figure 1. The reason for selectingsingle-chip microcomputer as a control core is that it possesses advantages of smallsize, high reliability, low price which made it very suitable to be used in industries ofintelligent instrument and real time control .The operating interface of system is shown in Figure 1.Number at upper right cornershows the default or user-defined gas concentration value, number at upper left cornershows detected gas concentration value. One alarm lamp is equipped. All functions arecontrolled by keys arranged on the control panel, including POWER key, RESET key,DATA COLLECTION key. Other keys including ten number keys, ADJUST VALUEkey and ENTER key are used to change threshold valuesFig.1 The operating interface of systemBasic operating procedures are as follows:Firstly press POWER key, the system initialized.Press DATA COLLECTION key, LED at upper right corner displays the threshold value 1.00;User can customized threshold value by press ADJUST VALUE key and tennumber keys, then press ENTER to confirm the change.System starts to detect gas concentration and display these parameters on upperleft LED area, at meantime transmit real-time data by RS-485 to host computerabove ground.The Hardware architecture of system mainly including main control unit, sensors andsignal amplifier circuit, A/D converter module, sound-light alarming circuit, keyboardand display module, serial-communication module.Featured by high integration level, small size and low prices, Single chip microcomputer has been widely used in a broad range of industrial applications including process controlling, data collection, electromechanical integration, intelligent instrument,household appliances and network technology, and significantly improved the degree of technology and automation.Fig.2 Main control unitTwo factors are taken into account here in chip selecting, first one is anti-interferenceability, increase the interferences in SCM application systems, so the SCM must have highresistance to outside interference; second one is the performance-price ratio of the SCM.Considering the aforementioned factors, we adopted the AT89S52 developed by ATMELas main control unit, and the final scheme of main control circuit consists ofAT89S52, timer and reset circuit .A crucial issue in gas detecting system design is how to select gas sensors.Common gassensors are metal oxide semiconductor such as tin oxide, zin coxide, titanium oxide andaluminum oxide. Problems encountered with these sensors are lack of flexibility, poor response times and operated at elevated temperature. A new method of ch4 detecting based on infrared techniques was presented in recent years, but it is still in progress and much work should be done before it can be applied to solve the practice problems .This system adopted catalytic combustion type gas sensor MC112 developed by SUNSTAR group to measure the gas (ch4) concentration. Figure 4 shows the outside view and internal circuit of MC112, table 1 lists the main technology parameters of MC112. MC112 gas detector exploits catalytic combustion principle; the two-arm bridge is comprised of measure and compensate components pairs. When it is exposed to combustible gases, measure components resistance RS increased and transmit output voltage parameter through measuring bridge, the voltage parameter is directly proportional to the gas concentration value. The compensate component works as temperature compensation and reference. Main features of MC112 include good repeatability, work stably, reliability, linear output voltage, and quick response. The mine safety rules stated that if methane gas concentration exceeds 1%, safety system should make an alert, if gas concentration exceeds 2%, all people must evacuate immediately. Since the detecting range of MC112 for low concentration methane is 0%-2%.Fig. 3 Outside viewIt is necessary to amplify the weak electrical signal detected by MC112 (1% gas concentration fluctuation will result in 16mv voltage change). The system adopted AD623 developed by AD Company as the high performance instrumentationamplifier. It has many merits: (1) output with 3-12v single supply (2) easy to modify signal gain though an external resistor, it will be act as a unit gain without external resistor and signal gain can reach to 1000 with an external resistor; (3)low power consumption, large-scale operation voltage, good linearity, good thermal stability and high reliability. The schematic diagram of signal amplifier circuit is shown in figure 4.Fig.4 Signal amplifier circuitAs shown in Figure 5, this module consists of multiplexer CD4051, sampling holder LF389, A/D converter AD574A and parallel I/O chip 8255A. As a core part, AD574A is a 12-bit successive-approximation A/D converter chip with three-state buffer, its conve rsion time is about 25μs. AD574A can directly connected to AT89S52 without additional interface logic circuit, with internal high accuracy reference power supply and clock circuit, AD574A can operate normally without external clock sourceand reference power supply.Fig.5 A/D converter modelTraditional LCD module is unsuitable in this system because the working environment mainly lies deep in dark coal mine tunnel. LED with soft light should be the alternative. It is suitable for the adverse circumstances under coal mine features by damp-proof, excellence temperature characteristics and long distance visual effects. In this system, a 6-bit LED is adopted to dynamically display the ch4 gas concentration value, with the segment port and bit port connected with PA port and PB port of 8155(1) separately.In keyboard input module, we arranged 13 keys including 10 number keys and “Data collection” key, “Enter” key, “reset” key. Adopted opposite direction connect method, PB port and PC port of 8155(2) connected to keyboard’s row circuit and column circuit respectively.The serial communications module is shown at the left part in Figure 9, signal of microcontroller is transmitted to host computer above ground by RS-485, and MAX485 is used to convert the voltage. RS-485 is a multi-point two-way half-duplex communication link based on single balanced-wire circuit featured by high noise suppression, high transfer rate, long distance transmission and Wide common-mode range, its maximum transfer rate reaches to 10Mbps, maximum cable distance reaches to 1200m.The primary functions of the software control system including system initializing, threshold value setting, methane gas concentration data collecting and displaying, serial communications etc. To achieve the above functions, we developed serial programsusing 51 serials microcontroller assemble program language including main program, keyboard scanning program, A/D converter program, alarming program, serial communications program, data display program, system alarming diagnosis program, double-byte multiply program, triple-byte to binary-coded-decimal program and watching dog program. The system is comprised of many modules, Owing to limited space we introduce main program only. main program initializing single chi p microcomputer’s registers and I/O ports, then scanning keyboard to see if the data collection key is pressed, if no, keep scanning keyboard until data collection key is pressed. When the collection key is pressed down, default threshold value 1.00 is shown on the panel, if user wants to reset threshold value, just press the ADJUST VALUE key to set a new value, and press ENTER key to finish this step. When ENTER key is pressed, system start the operating of data collection and A/D conversion, then transmit the converted data into binary format by calling a subprogram of double-byte multiply. We need three storage units to hold these data because they are 24 bits data in binary format. Next, system will transmit these binary format data into binary-coded-decimal format by calling a subprogram of triple-byte to binary-coded-decimal. In the last step, comparing the value with pre-set threshold value to decide if the system should send an alarm signal. In the meantime, these data will be sending to host computer above ground through RS-485 serial communications unit. Still, the system will send a positive pulse to reset the watchdogtimer every 1.6 sec. the Crystal Oscillator frequency of the SCM adopted in this system is 12MHZ, with timer/counter TO, working in mode 1(16bit timer/counter), its maximal timing interval is about 66ms, so the system will send a feeding dog signal to watch dog circuit every 66ms.In this study, an intelligent gas detecting system is presented. It can be used to real-time monitoring the methane gas concentration . The measuring scope of this system range from zero to 2 percent, the sensitivity of the sensor reach to 0.01 percent.It is equipped with the quick speed and high performance 12-bit A/D converter, the operating environment temperature ranged from -20℃～+70℃. Still this system features with high reliability, easy to operate, high performance-price ratio. In this paper, the total plan and software and hardware design of a gas detecting system are presented, by using Proteus to test hardware circuit and using Keil to test assemble language source program, the simulation test result shows this system is of high accuracy, quick response and is feasible.研究智能气体检测系统在本文中，检测系统采用单片机作为控制计算机。
传感器技术外文文献及中文翻译
传感器技术外文文献及中文翻译引言传感器是现代检测技术的重要组成部分，它能将物理量、化学量等非电信号转换为电信号，从而实现检测和控制。
传感器广泛应用于工业、医疗、军事等领域中，如温度、湿度、气压、光强度等参数检测。
随着科技的发展，传感器不断新型化、微型化和智能化，已经涵盖了人体所有的感官，开启了大规模的物联网与智能化时代。
本文将介绍几篇与传感器技术相关的外文文献，并对其中较为重要的内容进行中文翻译。
外文文献1标题“Flexible Sensors for Wearable Health: Why Materials Matter”作者Sarah O’Brien, Michal P. Mielczarek, and Fergal J. O’Brien文献概述本文主要介绍了柔性传感器在可穿戴健康监测中的应用，以及传感材料的选择对柔性传感器性能的影响。
文章先介绍了柔性传感器的基本工作原理和常见的柔性传感材料，然后重点探讨了传感材料对柔性传感器灵敏度、稳定性、响应速度等性能的影响。
最后，文章提出未来柔性传感器材料需满足的性能要求，并对可能的研究方向和应用进行了展望。
翻译摘要柔性传感器是可穿戴健康监测中重要的成分，通过将身体状态转化为电信号进行检测。
选择合适的传感材料对柔性传感器产品的成本、性能及标准化有着面向未来的影响。
本文对柔性材料的常见种类 (如: 聚合物、金属、碳复合材料等) 进行了介绍，并重点探讨了传感材料选择的影响因素，如对柔性传感器的灵敏度、特异性和响应时间等。
此外，文章还探讨了柔性传感器的性能要求和建议未来的技术方向。
外文文献2标题“Smart sensing system for precision agriculture”作者Olivier Strauss, Lucas van der Meer, and Benoit Figliuzzi文献概述本文主要介绍智能传感系统在精准农业中的应用。
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分辨率可编程单总线数字温度传感器——DS18B201 概述1.1 特性：⏹独特的单总线接口，只需一个端口引脚即可实现数据通信⏹每个器件的片上ROM 都存储着一个独特的64 位串行码⏹多点能力使分布式温度检测应用得到简化⏹不需要外围元件⏹能用数据线供电，供电的范围3.0V～5.5V⏹测量温度的范围：-55℃～+125℃（-67℉～+257℉）⏹从-10℃～+85℃的测量的精度是±0.5℃⏹分辨率为9-12 位，可由用户选择⏹在750ms 内把温度转换为12 位数字字（最大值）⏹用户可定义的非易失性温度报警设置⏹报警搜索命令识别和针对设备的温度外部程序限度（温度报警情况）⏹可采用8 引脚SO（150mil）、8引脚μSOP和3引脚TO-92 封装⏹软件兼容DS1822⏹应用范围包括：恒温控制、工业系统、消费类产品、温度计和任何的热敏系统图1 DS18B20引脚排列图1.2 一般说明DS18B20数字温度计提供9至12位的摄氏温度测量，并具有非易失性的用户可编程触发点的上限和下限报警功能。
DS18B20为单总线通信，按定义只需要一条数据线（和地线）与中央微处理器进行通信。
DS18B20能够感应温度的范围为-55~+125℃，在-10~+85℃范围内的测量精度为±0.5℃，此外，DS18B20 可以直接从数据线上获取供电（寄生电源），而不需要一个额外的外部电源。
每个DS18B20都拥有一个独特的64位序列号，因此它允许多个DS18B20作用在一条单总线上，这样,可以使用一个微处理器来控制许多DS18B20分布在一个大区域。
受益于这一特性的应用包括HAVC 环境控制、建筑物、设备和机械内的温度监测、以及过程监测和控制过程的温度监测。
注意： A "+"符号在封装上也标有图2 订购信息表1 DS18B20详细引脚说明* 表中所有未列出的引脚都是NC （空接）2 工作原理及功能2.1 温度测量DS18B20 的核心功能是它的直接数字温度传感器器，其分辨率可由用户配置为9、10、11 或者12 位，相应的增量值分别0.5℃、0.25℃、0.125℃和0.0625℃。
DS18B20上电时默认的分辨率是12 位，上电时处于低功耗的空闲状态，初始化温度测量和A/D 转换时，S O* μS OP * TO-92 符号 说明4 4 1 GND 地5 1 2 DQ 数据输入输出引脚，开路单总线引脚，当使用寄生电源模式时给器件供电（见寄生电源部分） 383VDD可选VDD 引脚，在寄生电源操作模式下VDD必须接地主机必须发送一个温度转换的指令[44H]。
转换后，测出的温度数据保存在暂存寄存器中的两字节温度寄存器中，然后DS18B20 返回到它的空闲状态。
如果DS18B20 有外部电源供电，主器件发送温度转换指令后要确保“读时隙”（参见单总线系统部分），DS18B20 在温度转换的处理中将返回一个0 作为相应，转换完以后将返回一个1。
如果DS18B20 采用寄生电源供电，那么上面的注意事项不在应用，因为在整个温度转换的过程中总线被一个强的上拉电流拉为高电平。
这个数据表总线要求将会在DS18B20 的供电部分做详细的解释。
DS18B20 输出温度被校准为摄氏温度。
为了使用华氏温度，必须使用一个查找表或者准换程序。
温度数据以16 位完整的数据存储在两个温度寄存器中（见图4）符号位S 表示测量的温度是正还是负，测量数据为正S=0，测量数据为负S=1。
如果DS18B20 被配置为12位的分别率，那么问对寄存器中所有的数据都是有效的数据，对于11 位的分辨率，位0 没有被定义，对于10 位的分辨率，位0 和位1 没有被定义，而对于9 位分辨率的，位2、1、0位都没有定义，表2 给出了一个分辨率为12 位转换后的数字输出数据和相应的读取的温度的值。
图3 温度寄存器格式表2 温度和数据的关系温度/℃二进制表示十六进制表示+125 0000 0111 1101 0000 07D0H+85 0000 0101 0101 0000 0550H+25.0625 0000 0001 1001 0000 0191H+10.125 0000 0000 1010 0001 00A2H+0.5 0000 0000 0000 0010 0008H0 0000 0000 0000 1000 0000H-0.5 1111 1111 1111 0000 FFF8H-10.125 1111 1111 0101 1110 FF5EH-25.0625 1111 1110 0110 1111 FE6FH-55 1111 1100 1001 0000 FC90H* 上电复位后温度寄存器的值为+85℃。
2.2 告警信号DS18B20 温度转换完成后，温度值将和用户定义的存储在TH 和TL 寄存器中一个字节的报警触发值相比较，见图4。
符号位（S）表明测量值是正还是负，S=0为正值，S=1则为负值。
TH 和TL 寄存器是非易失性的（E2PROM），因此在器件掉电后仍能够保存数据。
TH 和TL 能够通过暂存器的2,3字节来访问，正如这个数据表在存储器部分解释的一样。
图4 TH 和TL 寄存器的格式因为TH 和TL 是8 位寄存器，则在TH 和TL 的比较中，温度寄存器只使用了4~11位。
如果测量的温度低于或等于TL，或者高于或等于TH，报警情况将会发生，同时DS18B20 内部也会设置标志位。
每次测量后，这个标志位都会更新，因此，如果报警情况发生以后，每次温度转换完以后标志位将关闭。
主器件通过发出一个报警搜索命令（ECH）来检测所有挂接在总线上的DS18B20 器件报警标志位的状态，任何设置报警标志位的DS18B20 器件都能响应该指令，因此主器件能够精确的知道哪个DS18B20 发生报警情况。
如果报警情况发生了，或者TH 和TL 的设置发生了改变，则下次温度转换必须改变报警的条件。
2.3 DS18B20的供电DS18B20 可以由外部的VDD 引脚供电，也可以运作在寄生电源模式，即DS18B20 能够在无外部电源的情况下工作，而寄生电源对于远程温度传感和空间受限的情况是非常有用的。
图5给出了DS18B20 寄生电源控制电路，总线为高电平时，来自总线的"盗窃"电流流过DQ 引脚。
该电流在总线为高的时候给DS18B20 充电，部分电源将存储在寄生电源电容上（Cpp），并在总线为低的时候提供电源。
当DS18B20 采用寄生电源供电模式时，VDD引脚必须接地。
在寄生电源模式中，只要满足特定的时序和电压要求，单总线和Cpp 能够给DS10B20 提供有效的电流来满足绝大部分的操作。
（参阅直流电气部分范围交流电气部分的数据）。
然而在DS18B20 执行温度转换、或复制暂存器内的数据到E2PROM 的操作时，电流高达1.5mA。
这个电流将会在较小的总线上拉电阻上产生较大的电压压降，超过部分的电流将由Cpp 提供。
因此，为了确保在DS18B20 进行温度转换、或复制暂存器内的数据到E2PROM的操作时有足够的供电电流，要在单总线上提供一个大的上拉电阻。
正如图6给出的一样，这可以通过使用一个MOSFET 直接将总线拉至最大电流。
在发送一个温度转换指令[44H]或复制暂存器数据指令[48H]后，总线必须在10μS内转换为强上拉模式，且总线必须在温度转换（Tconv）和数据传输（Twr=10ms）时由上拉电阻保持在高电平。
当上拉电阻有效的时候，总线上不能做其他的操作。
DS18B20 也可以通过外部电源连接在VDD 引脚上的常规方法来供电，如图7 所示。
使用这种方法的好处是不需要MOSFET 的上拉电阻，同时在温度转换期间，单总线可以传输其他的数据。
在测量温度高于100℃的时候不推荐使用寄生电源供电，因为高温下较高的漏电电流使得DS18B20 不能维持通信，这时强烈建议使用外部电源供电。
在有些情况下，总线主机可能不清楚挂接在总线上的DS18B20 是寄生电源供电还是外部电源供电，而主机需要知道这一消息来决定是否在温度转换期间使用较大的上拉电阻。
为了得到这一信息，主器件在读时隙指令之后的读供电指令[B4h] 以后再发送一个扫描ROM［CCh］的指令，在读时隙期间，有寄生电源供电的DS18B20 将把总线拉低，而由外部供电的DS18B20 将维持总线为高电平。
如果总线为低电平，则主机在温度转换期间将在总线上使用强上拉电阻。
图5 DS18B20寄生电源供电图6 DS18B20外部电源供电2.4 64位激光ROM码每一个DS18B20 包含一个独特的64位编码（见图7）存储在ROM 中。
ROM 编码中的低八位有效数据包含了DS18B20 单总线的类码：28H。
接下来的48 位包含了一个独特的序列码。
高8 位是一个用来计算前56位ROM 编码的循环冗余校验（CRC）的字节。
CRC 的内容将在CRC 的产生部分详细说明。
64位ROM 编码和配套的功能控制逻辑允许DS18B20作为一个单总线器件能满足单总线系统一节中详述的协议。
图7 64位激光ROM 编码2.5 存储器DS18B20 存储器的结构如图8 所示，存储器由一个作为高、低报警触发寄存器（Th 和Tl）的非易失性E2PROM 和作为配置寄存器的暂存寄存器SRAM构成。
如果DS18B20 的报警功能没有使用，则TH 和TL 可以作为普通的寄存器来使用。
所有存储器指令将会在DS18B20功能指令部分详细的介绍。
特别的，暂存寄存器的字节1 和字节0 包含DS18B20温度寄存器的低有效位（LSB）和高有位（MSB）。
这些字节为只读性质。
字节2 和字节3 用来访问TH 和TL 寄存器。
字节4 包含了配置寄存器的数据，这部分将在配置寄存器的说明部分详细介绍。
字节5、6、7 保留给器件内部使用，并且不能被覆盖。
字节8 也是只读的，它包含寄存器内0~7字节的循环冗余校验码。
DS18B20 产生CRC 的方法将在CRC 的使用部分详细介绍。