传感器(sensor)英文PPT演讲课件

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传感器
制作人:XXX
Living in a rapidly developing society,we have the chance to enjoy many things people who has died can not.
But every machine can not work
without many special devices in it. These special devices are called “transducer” or“sensor”,which are widely used in everywhere. Sensors to machine is what sense organs to a people .Lots sensors make up the nervous system of the machine ,then the machine can be controlled by people to do what they want .
Others
新浪视频- 英国:传感器吃进肚 监测用药时 间 美国研发园艺传感器 植物“悲喜”尽在掌 握
Working principle
Light sensors can converts light signals into electrical signals with photosensitive element sensor , its sensitive wavelengths is close to the visible light wavelength, including infrared wavelengthand ultraviolet wavelengths. Light sensor is not limited to light detection, it also can be used as a detection device of other sensors to test many non-electrical, as long as the nonelectric can be converted into optical signal changes.
Acoustic sensors(声敏传感器)


Working principle
The sensor is sensitive to a built-in to sound capacitive [kə'pæsɪtɪv] electret microphone(电容式驻极话筒). Sound waves make the microphone electret film (驻极体膜) vibration [vaɪ'breɪʃ(ə)n], result in the change of capacitance [kə'pæsɪt(ə)ns], and produce with the corresponding change of tiny voltage ['vəʊltɪdʒ; 'vɒltɪdʒ]. Then this voltage is converted into 0 to 5 voltage, and transmitted to the computer, after A/D conversion was accepted by the data collector.
Aplication
A. the sensor does not need to check it again, the software zero(调零)automatically. B. sampling frequency must reach10000 times per second or more, otherwise,it’s not true and accurate to reflect the image of acoustic vibration. C. y coordinate of the image represents the voltage value corresponding to acoustic vibration . D. when cost limited , manufacturers can use positive and negative signal output, such as: TZ – 2KA and so on.


按测量目分类 物理型传感器是利用被测量物质的某些物理性质发生明显变化的特性制成的。 化学型传感器是利用能把化学物质的成分、浓度等化学量转化成电学量的敏感元件制 成的。 生物型传感器是利用各种生物或生物物质的特性做成的,用以检测与识别生物体内化 学成分的传感器。 按其构成分类 基本型传感器:是一种最基本的单个变换装置。 组合型传感器:是由不同单个变换装置组合而构成的传感器。 应用型传感器:是基本型传感器或组合型传感器与其他机构组合而构成的传感器。 按作用形式分类 按作用形式可分为主动型和被动型传感器。 主动型传感器又有作用型和反作用型,此种传感器对被测对象能发出一定探测信号, 能检测探测信号在被测对象中所产生的变化,或者由探测信号在被测对象中产生某种 效应而形成信号。检测探测信号变化方式的称为作用型,检测产生响应而形成信号方 式的称为反作用型。雷达与无线电频率范围探测器是作用型实例,而光声效应分析装 置与激光分析器是反作用型实例。 被动型传感器只是接收被测对象本身产生的信号,如红外辐射温度计、红外摄像装置 等。
翻译
定义: 能感受规定的被测量并按照一定的 规律转换成可 用输出信号的器件或装置。 作用:
探测、感受外界的信号、物理条件(如光、 热、 湿度)或化学组成(如烟雾),并将 探知的信息传递给 其他装置或器官。
Light sensor
Light sensor is the most current production, one of the most widely used sensors, it plays an important role in automatic control(自动控 制) and non-electricity measurement [‘meʒəm(ə)nt] technology(非电量电测技 术). The simplest photosensitive sensor is photosensitive resistance(光敏电阻), it will create electric current when photons(光子) hit joint(结合处).
分类
按用途分类 压力敏和力敏传感器、位置传感器、液位传感器、能耗传感器、速度传感器、加速度传感器、射线辐射 传感器、热敏传感器。 按原理分类 振动传感器、湿敏传感器、磁敏传感器、气敏传感器、真空度传感器、生物传感器等。 按输出信号为标准分类 模拟传感器:将被测量 传感器的非电学量转换成模拟电信号。 数字传感器:将被测量的非电学量转换成数字输出信号(包括直接和间接转换)。 膺数字传感器:将被测量的信号量转换成频率信号或短周期信号的输出(包括直接或间接转换)。 开关传感器:当一个被测量的信号达到某个特定的阈值时,传感器相应地输出一个设定的低电平或高电 平信号。 按其制造工艺分类 集成传感器是用标准的生产硅基半导体集成电路的工艺技术制造的。 通常还将用于初步处理被测信号的部分电路也集成在同一芯片上。 薄膜传感器则是通过沉积在介质衬底(基板)上的,相应敏感材料的薄膜形成的。使用混合工艺时,同 样可将部分电路制造在此基板上。 厚膜传感器是利用相应材料的浆料,涂覆在陶瓷基片上制成的,基片通常是Al2O3制成的,然后进行热 处理,使厚膜成形。 陶瓷传感器采用标准的陶瓷工艺或其某种变种工艺(溶胶、凝胶等)生产。 完成适当的预备性操作之后,已成形的元件在高温中进行烧结。厚膜和陶瓷传感器这二种工艺之间有许 多共同特性,在某些方面,可以认为厚膜工艺是陶瓷工艺的一种变型。 每种工艺技术都有自己的优点和不足。由于研究、开发和生产所需的资本投入较低,以及传感器参数的 高稳定性等原因,采用陶瓷和厚膜传感器比较合理。
Working principle l • Best-in-class performance with 0.02% high accuracy • Industry’s first 10 year stability under actual process conditions • Unprecedented reliability backed by a limited lifetime warranty • SuperModule™ design platform enables more cost effective installation and maintenance practices • Scalable functionality to meet your expanding needs
pressure sensor
Fra Baidu bibliotek
Pressure sensors can be classified in terms of pressure ranges they measure, temperature ranges of operation, and most importantly the type of pressure they measure.
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● Measure the arbitrary waveform cu rrent, such as DC, AC, and even to tra nsient peak parameters measurement; ● High precision. General Hall current sensor module’s precision in the work area is higher than 1%, and the precis ion is suitable for any waveform meas urement; ● The linearity is better than 0.5%; ● High reliability. Small size, light wei ght, easy to install and it will not bring any loss to the system. In view of the a bove high performance characteristics, the Hall current sensors gain the wide applications.
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