论文编号:JD618  论文字数:25031,页数:59

摘    要

温湿度测量系统的研究是具有深远意义的，像仓库、农田、塑料大棚以及其它生产过程，湿度过大会引起霉变和变质，温度变化会影响品质。精密仪器和半导体器件，温度过高或者湿度过大会导致性能降低。另外，人们生活质量的提高，对室内环境的高要求也需要对温湿度进行实时监控，由此可见，温湿度的测量应用范围是很广的。
本文设计的温湿度测量系统就是为某些有着特殊要求场合温度和湿度进行测量和监视而设计的。系统通过温湿度检测电路，把采集到的信号传给单片机，通过单片机来处理采集到的信号并通过LED显示出来，如果温湿度过高或过低，报警电路会自动报警。它使用89C51单片机，整个系统由温度检测电路、湿度检测电路、A/D转换电路、报警电路、显示电路和单片机等组成。
设计的系统结构简单紧凑，功耗较低，总体性能比较好，符合了智能仪器仪表小型化的潮流，为今后开发高性能和商品化的温湿度测量仪器奠定了良好的基础。
关键词：单片机；温度；湿度；传感器

The Measure System of Temperature and the Humidity
Base on the SCM
Abstract

Temperature and humidity measurement system's study is of far-reaching significance, such as warehouses, farms, greenhouses and other production process, the humidity had caused mildew and deterioration, temperature changes will affect the quality, precision equipment, semiconductor devices, high temperature or humidity The General Assembly had led to lower performance. In addition, people's improved quality of life, the indoor environment of high demand also need to conduct real-time monitoring of temperature and humidity, evidently, the measurement of temperature and humidity range is very wide.
     In this paper, the design of the temperature and humidity measurement system that is for certain special occasions, temperature and humidity requirements for a measurement, and monitoring and design. System through the temperature and humidity detection circuit, the acquisition of signal transmission to the Single-Chip, to handle collection through the Single-Chip to the signal and through the LED display, if temperature and humidity through high or too low, the alarm will automatically alarm circuits. It uses 89 C51 microcontroller, the entire system by the temperature detection circuit, humidity detection circuit, A / D converter circuit, alarm circuits, display components such as circuit and Single-Chip.
     The system design is simple compact, low power consumption, better overall performance, with a small smart instrumentation of the trend for future development and commercialization of high-performance temperature and humidity measuring instruments laid a good foundation.
Keywords：SCM;Temperature;Humidity;Sensor

目    录

引    言 1
第1章 绪论 2
1.1 概述 2
1.2 课题的总体设计及思路 2
1.3 各个环节及实现 3
第2章 系统硬件设计 5
2.1 单片机89C51的介绍 5
2.2 温度检测电路 9
2.3 湿度检测电路 18
2.4 A/D转换电路 21
2.4.1 ADS7816芯片简介 21
2.4.2 A/D转换电路 22
2.5 键盘电路 22
2.6 显示电路 23
2.7 报警电路 25
第3章软件部分设计 26
3.1 主程序流程图的设计 26
3.2 中断子程序流程图的设计 27
3.3 盘扫描程序设计 28
3.4 A/D转换程序的设计 29
3.5 显示子程序 31
第4章 调试 32
结论与展望 33
致    谢 34
参考文献 35
附录A  电气原理图 36
附录B  引用的外文文献以及译文 37
附录C  主要参考文献及摘要 42
附录D  源程序清单 44

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