摘 要单片机又称微控制器，以体积小、功能全、性价比高等诸多优点而独具特色，也因此单片机技术已经普与到我们生活、工作、科研等各个领域，本文主要介绍了一个基于 AT89S51 单片机的测温报警系统，描述了 AT89S51 单片机的基本信息以与利用 DS18B20 数字温度传感器开发测温系统，对其外围硬件连接、软件编程等模块都进行了详细介绍。该系统可以方便的实现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作、农业生产中的温度测量。DS18B20 与 AT89S51 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 AT89S51 温度传感器 DS18B20 数字温度报警器AbstractSingle chip, also known as micro-controller, small size, full-featured, cost performance advantages and unique, and therefore SCM technology has spread to our lives, work, research and other fields, this paper describes a test based on AT89S51 microcontroller temperature alarm system, describes the basic information and microcontroller AT89S51 DS18B20 digital temperature sensor development using temperature measuring system, connected to its peripheral hardware, software, programming modules are described in detail. Can facilitate the realization of the system to achieve temperature acquisition and display, and can be arbitrarily set the upper and lower limit alarm temperature, it is very convenient to use, with high precision, wide range, high sensitivity, small size, low power consumption, suitable for in our daily lives and industrial and agricultural production in the temperature measurement. Combined with the AT89S51 DS18B20 simplest realization of the temperature detection system, the system is simple, anti-interference ability, suitable for harsh environments spot temperature measurement, a wide range of ap...
