红外测温系统设计-毕业设计(DOC)

摘 要：

在当今的生活中，传统的水银温度计有着很多大大小小的缺点，虽然它价格低、性能稳定，但是它精度低、测量时间长、不安全等缺点，给我们带来了众多麻烦和不便。红外线测温仪集快速、准确、安全、方便可靠等众多优点于一身，很快便被越来越多的人们所认知和接受。

本文根据红外线测温的原理，以STC89C52单片机作为核心控制部件，控制系统运行，结合TN901红外测温模块，搭配液晶显示器实现测温。本文大致介绍了这套系统的构成和实现方式，给出硬件、软件方面的设计流程。此系统主要由光电探测部分、系统运行部分和显示输出部分等组成：由TN901进行红外辐射采集，传入单片机，经由单片机处理转换为电信号，并在液晶模块中显示出来。

关键词：红外线测温 STC89C52 TN901

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Abstract

In today's life, the traditional mercury thermometer has many large and small faults, although its price is low, performance is stable, but its low precision, measurement time, uneasy congruent faults, brings us many troubles and inconvenience. Infrared thermometer set rapid, accurate, safe, convenient and reliable, and many other advantages in one, soon cognitive and accepted by more and more people.

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This paper according to the principle of infrared temperature measurement, STC89C52 single-chip computer as core control unit, control system, combined with TN901 infrared temperature measurement module, match LCD to realize temperature measuring. This paper Outlines the composition and implementation of the system, gives the hardware and software aspects of the design process. This system is mainly composed of photoelectric detection system is running, and display output sections such as: infrared radiation by TN901 collection, introduced into single chip microcomputer, processed by single-chip microcomputer is converted to electrical signals, and displayed in the LCD module.

Keywords Infrared temperature measurement STC89C52 TN901

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苏州市职业大学电子信息工程学院毕业设计

目 录

1 绪论 ........................................................... 1 1.1 设计背景 ....................................................... 1 1.2 设计应用 ....................................................... 1 1.3 设计内容 ....................................................... 2 2 系统总体设计 ................................................... 3 2.1 方案论证 ....................................................... 3 2.1.1 红外测温模块的方案论证 ....................................... 3 2.1.2电源模块选取的方案论证 ........................................ 4 2.2 系统总体设计 .................................................... 5 2.3 系统总体框图 .................................................... 5 2.4 STC89C52单片机概述 ............................................. 6 2.5 红外测温的原理及方法 ............................................ 8 2.5.1 红外测温的原理 ................................................ 8 2.5.2 红外测温的方法 ................................................ 9 2.6 红外测温模块 ................................................... 10 3 硬件电路设计 .................................................. 11 3.1 硬件电路图 ..................................................... 11 3.2 按键部分的制作 ................................................. 12 3.3 电源模块的制作 ................................................. 12 3.4 单片机模块的设计 ............................................... 13 3.5 LCD显示模块设计 ............................................... 13 4 软件的设计 .................................................... 15 4.1 软件总体流程图 ................................................. 15 4.2 红外测温模块 ................................................... 16 4.3 显示模块部分 ................................................... 18 5 系统测试 ...................................................... 19

结 论 ............................................................ 20 致 谢 ............................................ 错误！未定义书签。 参考文献 ........................................................ 21 附 录A 元器件清单 ................................................ 22 附 录B 电路原理图 ................................................ 24 附 录C 源程序 ................................................... 25

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