基于AT89C51单片机与DS18B20的温度测量系统

A Temperature Measure System based on AT89C51 and DS18B20

DALLAS公司的单总线数字温度传感器DSl8B20以其线路简单、硬件开销少、成本低廉等一系列优点,有着无可比拟的应用前景。文章首先介绍了DSl8B20的特性及工作原理。接着提出了一种基于AT89C51单片机与DS18B20的温度测量报警系统,分析了系统的硬件结构及软件设计。其中,详细介绍了AT89C51对DS18B20的操作流程,及使用DS18B20时候的注意事项。该温度测量系统具有结构简单、价格低廉、扩展方便和应用广泛等一系列优点。

DALLAS Corporation＇s 1-wire bus digital temperature sensor has incomparable application prospect because its circuit is simple, and with fewer hardware expenses.This paper introduces the structure and principle of the 1-wire bus digital temperature sensor, presents the hardware and compile program design of temperatllre measure and alarm system which based on AT89C51 and DS 18B20. This paper explains transaction sequence of DS 18B20 and points for attention. This device has some advantages such as： simple structure,low price.It also can be easily extended and has important application perspectives.