基于51单片机设计温度报警器论文.doc

PAGE PAGE 25 摘 要 随着时代的进步和发展，温度的测试已经影响到我们生活、工作、科研、各个领域，已经成为一种非常重要的事情,因此设计一个温度测试的系统势在必行。 本文主要介绍了一个基于89S51单片机的测温系统，详细描述了利用数字温度传感器DS18B20开发测温系统的过程，重点对传感器在单片机下的硬件连接，软件编程以及各模块系统流程进行了详尽分析，对各部分的电路也一一进行了介绍,该系统可以方便的实现温度采集和显示，并可根据需要任意设定上下限报警温度，它使用起来相当方便，具有精度高、量程宽、灵敏度高、体积小、功耗低等优点，适合于我们日常生活和工、农业生产中的温度测量，也可以当作温度处理模块嵌入其它系统中，作为其他主系统的辅助扩展。DS18B20与AT89C51结合实现最简温度检测系统，该系统结构简单，抗干扰能力强，适合于恶劣环境下进行现场温度测量，有广泛的应用前景。 关键词：单片机；温度检测；AT89S51；DS18B20； Based on SCM and DS18B20 temperature alarm system Abstract With the progress of The Times and development, temperature test has been affect our life, work, scientific research, each domain, has become a very important thing, therefore to design a temperature testing system is imperative. This paper mainly introduces a 89S51 MCU based on temperature measuring system, described in detail by using digital temperature sensor DS18B20 development temperature measuring system, focusing on the process of sensors in the hardware connection, microcontroller software programming and each module in the system flow makes a detailed analysis, part of the circuit also introduces one, the system is easy to realize the temperature gathering and display, and can according to need to set arbitrary upper alarm temperature, it USES up is very convenient, with high precision, range wide, high sensitivity, body ? Key Words：Microcontroller, Temperature detection. AT89S51; DS18B20, 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc4512 摘 要 PAGEREF _Toc4512 1 HYPERLINK \l _Toc27418 on SCM and DS18B20 temperature alarm sysBased tem PAGEREF _Toc27418 2 HYPERLINK \l _Toc1910 Abstract PAGEREF _Toc1910 2 HYPERLINK \l _Toc15220 引 言 5 HYPERLINK \l _Toc14837 1.温度检测系统设计概述 6 HYPERLINK \l _Toc3570 2.方案论证 7 HYPERLINK \l _Toc1711 2.1方案一：使用热敏电阻 7 HYPERLINK \l _Toc21710 2.2 方案二：采用数字温度芯片DS18B20 7 HYPERLINK \l _Toc15899 3.各电路设计及论证 8 HYPERLINK \l _Toc20776 3.1 主控制器 8 HYPERLINK \l _Toc3417 3.1.1 方案一：采用PC机实现 8 HYPERLINK \l _Toc4655 3.2 显示电路 11 HYPERLINK \l _Toc19233 3.2.1 方案一