ABSTRACT

Infrared temperature measurement technology plays an important role in product quality control and monitoring，equipment on-line fault diagnosis and safety protection，and energy saving in the production process. In the past 20 years，the non-contact infrared human thermometer has been developed rapidly in technology，the performance is constantly improved，the function is constantly enhanced，the variety is increasing，and the scope of application is also expanding. This paper is the infrared sensor human temperature measurement system designed according to the above practical requirements.

This paper introduces the realization method of infrared sensor human temperature measuring system to improve the data，combined with pyroelectric principle，based on STC89C51 single chip microcomputer as its core control component and infrared temperature measuring probe TN901，this design system needs to adopt infrared pyroelectric sensor，design temperature acquisition circuit independently，temperature acquisition circuit includes optical sensor part，signal amplifier，filter，integrator，AD analog-d converter circuit，single chip microcomputer system circuit,4-digit digital tube circuit or liquid crystal display. After the signal processing and send it out，through the LCD1602 display screen into Line display. The advantage is that the body’s temperature can be measured quickly and accurately. Compared with the traditional mercury thermometer，it has the advantages of high precision，short measurement time and easy reading.

Keywords:51 single chip microcomputer；infrared sensor；human temperature measurement system；liquid crystal display screen

目  录

摘  要 I

ABSTRACT II

目  录 III

1绪论 1

1.1选题背景及依据 1

1.2国内外研究现状 1

1.3研究内容 3

2 红外传感器人体测温系统原理及方案设计 4

2.1温度测量技术的概述 4

2.2 红外测温原理及方法 4

2.3 红外传感器人体测温系统的方案介绍 5

3 红外传感器人体测温系统的硬件设计 9

3.1 单片机处理模块 9

3.2 红外测温模块 11

3.3 电源模块 11

3.4 键盘模块 12

3.5 LCD显示模块 12

4 红外传感器人体测温系统的软件设计 13

4.1 主程序模块的设计 13

4.2 红外测温程序模块 14

4.3 键盘扫描程序模块 15

4.4 显示程序模块 15

5 红外传感器人体测温系统仿真调试与分析 17

5.1系统调试 17

5.2 结果分析 18

结  论 20

致  谢 21

参考文献 22

附录一 原理图 23

附录二 元器件清单 24

附录三 程序 25