基于单片机的温度采集与控制系统的设计.doc

童昊：基于单片机的温度采集与控制系统的设计 安徽工程大学毕业设计 - 基于单片机的温度采集与控制系统的设计 摘 要 温度是一个很重要的物理量在工农业生产中经常遇到温度的测量和控制因此对温度检测和控制具有非常重要的意义。 近年来随着计算机在社会领域的渗透, 单片机的应用正在不断地走向深入，同时带动传统控制检测的不断更新。本系统是以AT89C51单片机为检测控制中心的智能控制系统。其总体设计是围绕低成本、高精度、高可靠性的特点展开的。在硬件选择方面,选择性价比高的AT89C51系列单片机、DS18B20数字式温度传感器、LED显示器。DALLAS公司的单总线数字温度传感器DS18B20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。为了便于扩展和更改，软件的设计采用模块化结构，使程序设计的逻辑关系更加简洁明了，使硬件在软件的控制下协调运作。 文章详细介绍AT89C51对DS18B20的操作流程，及使用DS18B20时的注意事项。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。 关键词：温度控制；AT89C51；DS18B20 The Design of Temperature Acquisition Control System Based on Single-chip Abstract Temperature is a very important parameter. We frequently use the measurement and control of temperature in industry and agriculture. Therefore, the measurement and control of temperature is extremely important. In recent years along with computer penetration in the social sphere, SCM applications are constantly deepening led the traditional control test at the same time ever updated. In this paper, the development of an intelligent control system based on AT89C51 single-chip is presented. Low cost, accurate, and reliable possibility of the intelligent temperature control system are taken into consideration for design. In the hardware aspect, the AT89C51 with high capability price ratio, DS18B20 temperature sensor, LED monitor are chosen. DALLAS Corporation’s 1-wire bus digital temperature sensor has incomparable application prospect because its circuit is simple, and with fewer hardware expenses. In order to facilitate the expansion and the change, the software design uses the modular structure; make the logic relation of designing program more concise, making hardware to coordinate the operation under the software control. This paper explains transaction sequence of DS18B20 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. Keywords: temperature control；AT89C51；DS18B20 目 录 TO