红外电子体温计的设计方案二

摘要：体温计是人们日常生活中的必备品，但是传统的水银体温计测量时间长，读数也不方便。本课题基于传统体温计的这些缺点设计出一种新型的电子体温计，它在测温精度能与传统的水银温度计相媲美的情况下，大大的缩短了测温时间,携带方便,对环境几乎没有污染。本次设计以单片机为整个体温计的核心，运用红外线原理去设计一个基于单片机的无线电子体温计，利用热释电红外传感器，采集人体发射出的红外线，再将转换之后的电信号通过A/D转换送入单片机，由MCS-51单片机来实现温度值的转换及送入LED显示，同时还加入了时钟功能和超温报警功能，在软件的控制下，实现智能化的体温测量，精确测温，使设计具有实用性。

关键字：体温计、红外线、单片机

Abstract: Thermometer is an essential goods in our daily life, but the traditional measurement of the mercury needs a long time, reading is not convenient. This subject which based on the traditional thermometer ’defects designed a new type of electronic thermometer, has comparable circumstances on temperature measurement accuracy with traditional mercury thermometers, greatly reduced the temperature time, and it is easy to be carried, it has almost no pollution on the environment . The design use a microcontroller as the core of the thermometer, use infrared principles to design a microcontroller-based wireless electronic thermometer, use pyroelectric infrared sensors, collect the infrared that body emits, then deliver the signal to the microcontroller by A / D conversion, use the MCS-51 microcontroller to implement the conversion ,and deliver the temperature value into the LED display, this design also added a clock function and over-temperature alarm function, under the control of software, intelligent temperature measurements, accurate temperature measurement, make the design practical. Keyword:thermometer、infrared、microcontroller

目录

摘要............................................... 错误!未定义书签。Abstract ........................................... 错误!未定义书签。目录 (3)

引言................................................ 错误!未定义书签。

1、绪论 (2)

1.1红外测温技术简介.............................. 错误!未定义书签。

1.2单片机简介 (2)

2、整体方案设计 (5)

2.1整体设计方案的实现 (5)

2.1.1设计原理 (5)

2.1.2系统框图 (5)

2.2 系统总方案 (6)

2.2.1 系统工作原理 (6)

2.2.2 系统总硬件原理图 (6)

2.3 系统开发方法及开发工具....................................... . (7)

2.3.1 硬件开发工具介绍........................................ .. (7)

2.3.2 软件开发工具介绍................................................................... .. (8)

2.4元器件方案选择 (9)

2.4.1 单片机芯片选择................................................................... (9)

2.4.2 红外温度传感器 (9)

2.4.3ADC芯片选择 (10)

2.4.4 显示器件选择................................................................... (11)

3、系统硬件设计..................................... 错误!未定义书签。

3.1 系统的模块设计................................ 错误!未定义书签。

3.1.1 信号采集模块 (12)

3.1.2 ADC模块 (18)

3.1.3 单片机控制模块 (21)

3.1.4 显示模块 (25)

3.2系统改进设计 (27)

3.2.1 时钟显示功能 (27)

3.2.2 超温报警功能 (29)

4、系统软件设计 (30)

4.1软件实现 (30)

4.1.1 程序设计方法..............................................

4.1.2 程序设计语言选择..........................................

4.1.3 系统流程图................................................

4.2程序模块分析 (32)

4.2.1 AD转化模块程序分析................................................................... . (32)

4.2.2 时钟显示模块程序分析................................................................... . (34)

4.2.3 主程序分析 .................................................................. .. (38)

4.3软件仿真 (31)

4.3.1 Proteus仿真软件介