非接触式人体温度测量仪设计论文

西电“星火杯”论文

人体温度非接触式测量仪

院系: 电子工程学院

班级: 021012

作者：02101165

02101109

02101169

02101135

02101122

西安电子科技大学

摘要

红外测温技术由于其方便、快速、准确的特点而被广泛应用于医学、航空以及钢铁制造等工业中。本文介绍了一种使用51单片机作为控制器、基于红外热释电温度传感器TPS434的非接触式电子体温计的实现方法，并在此基础上给出了实现电子体温计的电路原理以及程序流程。

系统工作原理是智能电子体温计是一种典型的智能化仪表，它以单片机作为核心，在软件控制下，与其它硬件电路相结合，实现智能化的体温测量。系统硬件组成环节主要有：温度传感器、放大电路、A／D转换电路、单片机系统、液晶显示模块和语音芯片。其软件部分包括：A／D转换、数字滤波、智能功能以及显示等程序。其工作原理是：体温信号由温度传感器变换为电信号后，进入放大电路进行放大处理以满足A／D转换器的要求，然后在A／D转换程序控制下经A／D 转换器转换成数字信号。此信号送入单片机系统，利用单片机本身的软件功能进行数字滤波、线性化处理、数据存储、逻辑判断，从而实现相应的智能功能。并将最后的测量结果送人液晶显示模块，在显示程序控制下进行显示，包括显示温度数据和汉字。同时语音芯片在程序的控制下进行语音播报。从而使测温前后的各种操作更趋于智能化和人性化。

关键词: 单片机; 红外体温计; 热电堆; 热敏电阻; TPS434;

ABSTRACT

The technique of temperature measurement is widely used in iatrology, aviation,and stell manufacture because of its convenience, fast speed and high accuracy. This paper introduce a method to design an un-touched electronic thermometer which based on MS51 single chip and infared sensor TPS434. Also, it gives the principle of the electronic thermometer and the programe flow figure.

System is the principle of intelligent electronic thermometer is a typic intelligent instruments, to SCM as its core, under the control of the software, hardware and other circuits combined, and intelligent temperature measurement. System hardware links are: temperature sensors, amplifier, A / D converter circuit, SCM systems, liquid crystal display modules and voice chips. Some of its software, including: A / D converter, digital filtering, intelligent show, and other functions and procedures. Its working principle is: the temperature signals from temperature sensors to transform electrical signals, into the amplifier to zoom in processing to meet the A / D converter requirements, and then in the A / D converter controlled under the A / D converter into digital Signal. This signals into the SCM system, using their own SCM software for digital filtering, linear processing, data storage, logical judgement, thus realizing the corresponding intelligent functions. And the final survey results to give liquid crystal display modules, are displayed under the program control, including temperature data and display Chinese characters. At the same time voice chip in the process conducted under the control of voice broadcast. So that the temperature before and after various operations tend to be more intelligent and humane. Keywords: Single chip; Infared thermometer; Thermopile; Thermistor; TPS434;

目录

第一章绪论 (6)

1.1 体温计的发展与现状 (6)

1.2 红外测温技术 (6)

1.2.1 红外测温背景 (7)

1.2.2 红外测温原理 (7)

1.2.3 红外测温传感器分类 (9)

1.2.4 红外测温的优点 (9)

第二章整体方案概述 (10)

2.1 系统结构框图 (10)

2.2 核心器件简介 (10)

2.2.1 电源部分 (11)

2.2.2 8051单片机 (12)

2.2.3 红外温度传感器 (12)

2.2.4 高精度运放 (13)

2.2.5 语音芯片 (13)

2.3 本章小结 (14)

第三章系统硬件设计 (14)

3.1 电源设计 (14)

3.1.1 稳压芯片介绍 (14)

3.1.2 原理概述 (15)

3.2 信号调理电路 (18)

3.2.1 前置放大电路 (18)

3.2.2 次级调理电路 (19)

3.3 图形点阵式LCD显示电路 (20)

3.3.1 图形点阵式LCD-12232概述 (20)

3.3.2 图形点阵式LCD-12232与MCU接口设计 (21)

3.3.3 图形点阵式LCD-12232驱动方法 (21)

3.4 语音播报电路 (24)