毕业设计（论文）-恒温箱单片机控制系统设计精选.doc

广东工业大学 华立学院 本科毕业设计（论文） 恒温箱单片机控制系统设计 论文题目恒温箱单片机控制系统设计 系 部 机械电气学部 专 业 自动化 班 级 06自动化2班 学 号 学生姓名 指导教师 年 月 摘 要 温度控制是工业控制中主要的被控参数之一，特别是在冶金、化工、建材、食品、机械、石油等工业中，具有举足重轻的作用。随着电子技术和微型计算机的迅速发展，微机测量和控制技术得到了迅速的发展和广泛的应用。 单片机具有体积小、功能强、成本低、应用面广等优点，可以说，智能控制与自动控制的核心就是单片机。目前，一个学习与应用单片机的高潮在全社会大规模地兴起。学习单片机的最有效方法就是理论与实践并重Abstract Temperature Control is one of main Charged with parameters at Industrial Control. Especially in metallurgy, chemical, building materials, food, machinery, petroleum and other industries has held the role of foot heavy-light. As the rapid development of electronic technology and micro-computer. Micro-computer measurement and control technology has been rapid development of and wide range of applications. Temperature control is used widely in industry production,with large lag and big disturb. About the thermostat control system, its key technology is to control a constant temperature inside, SCM has a small volume, strong function, low cost, wide application scope etc. It can be said，Intelligent control and automatic control of the microcontroller core is SCM，These days，A culmination of study and application of SCM the rise of a large scale in the whole society. The most effective way to learn SCM is both theoretical and practical, this paper uses AT89C52 SCM and DS18B20 digital temperature sensor to measure the temperature of the incubator, then compared with the set temperature . According to the results of this comparison, the PID algorithm to control the output PWM signal ,then control the action heating equipment, so as to achieve stable temperature control purposes. Keywords：Incubator Digital temperature sensor PWM signal Signal chip Microcomputer 目 录 1 前言 1 2 设计的基础依据与研究意义 2 3 系统综合设计 4 3.1 本设计将实现的要求 4 3.2 系统方案的选择与论证 4 3.3 系统硬件结构图 5 4 系统各单元硬件的设计 6 4.1 单片机主控制模块的设计 6 4.2 温度采集模块设计 7 4.2.1数字温控芯片DS18B20介绍 7 4.2.2 DS18B20引脚功能、接法 7 4.2.3 DS18B20的特性指标 7 4.2.4 DS1