基于51单片机的DS18B20温度传感器的应用

范文编号:JD1205  范文字数:12458

基于51单片机的DS18B20温度传感器的应用

摘要

    温度的测量和控制对人类日常生活、工业生产、气象预报、物资仓储等都起着极其重要的作用。在许多场合，及时准确获得目标的温度是十分重要的，近年来，温度测控领域发展迅速，并且随着数字技术的发展，温度的测控芯片也相应的登上历史的舞台，能够在工业、农业等各领域中广泛使用。温控系统通过传感器检测温度将温度数据输入到处理器处理，可以在数码管或LCD等显示出来。然后由控制器可以控制加热或者制冷，从而达到控温的目的。
 本文档设计就是利用STC89C52单片机和DS18B20温度传感器对目标温度进行检测，使用了单位数码管对检测到温度的显示，通过串口和上位机进行通信，利用VB软件显示温度数据，从而对各空间温度进行远程实时监控，使用LED灯闪烁进行模拟加热和制冷。本文对各部分的硬件原理图进行了分析，还对各功能程序进行概述。通过51单片机控制DS18B20检测温度，具有硬件电路简单，编程容易，测温准确，稳定等优点。而且可以多点检测（本毕设只是单点测温），几个传感器连接也很简单。
 
关键词：单片机；温控；传感器

Abstract       
       Temperature measurement and control of human daily life, industrial production, weather forecast, material storage and so on all play a very important role. On many occasions, timely and accurate to obtain the temperature of the target is very important, in recent years, the temperature measurement and control field is developing rapidly, and with the development of digital technology, the corresponding temperature measurement and control chip mounted on the stage of history, can be widely used in industry, agriculture and so on various areas. Temperature control system through the temperature sensor to detect temperature data input to processing, can be in the digital tube or LED display, etc. And then by the controller to control the heating or cooling, so as to achieve the purpose of temperature control.
       This graduation design is the use of STC89C52 MCU and DS18B20 temperature sensor to test the room temperature, for testing temperature using digital tube display, through a serial port and PC communication, using VB software display temperature data, thus to remote real-time monitoring of the room temperature, use LED lights to simulate the heating and cooling. By 51 single chip microcomputer control temperature DS18B20 detection, it has a simple hardware circuit, programming easily, temperature measurement accuracy, stability, etc. And can be more testing (this project is only a single point temperature measurement), several sensor connection is also very simple.

Keywords: MCU；temperature control；sensor

目录  

引言1
1  绪论2
1.1 单片微机的发展.2
1.2 温度检测的意义及发展形势.2
1.3 温控系统设计的核心.2
2  单片机的简述.3
2.1 单片机的特点及引脚介绍.3
2.2 单片机的电平特性.5
2.3 C51复位电路.6
2.4 时钟电路.6
3  温控系统的硬件设计7
3.1 温度检测模块.7
3.1.1 温度传感器的概述.7
3.1.2 DS18B20的工作原理及工作时序图.9
3.2 显示模块.12
3.3 温超报警模块.14
3.4 串口通信模块.15
4  软件设计17
4.1 系统整体设计.17
4.2 温度获取并转换.19
4.3 温度控制.20
5 单片机与上位机通信21
总 结.23
谢 辞.24
参考文献25
附录1电路原理图.26
附录2 完整C程序代码28
附录3 模块调试代码34

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