毕业设设计论文韩颖超温度控制电路1.docx

本科生毕业设计(论文)
题目: 温度控制电路
教学单位电气信息工程学院_
姓名_ 韩颖超______ ___
学号___200531002050__
年级___2005级_________ _
专业___电子信息工程_____
指导教师___王小玲
职称___
2009年4月20日
温度控制电路设计
摘要
在电子技术飞速发展的今天,测量控制技术已经涉及到军事和工业的各个环节,并越来越多的受到人们的重视。传感器的出现,使得人们生产生活方式发生了重大变化,使得科学实验和应用工程的自动化程度发生了巨大改变。
温度是工业生产科学研究等行业中相当重要的参数之一,温度控制在各个行业中都是相当重要的一个环节对人们生活生产起着重大作用。温度控制的关键在于测温和控制两个方面。温度测量是温度控制的基础。
论文主要讨论了基于模拟电路的温度控制电路,该电路通过精密摄氏温度传感器LM35测量温度将温度比较转化为电压比较的方法来达到控制的目的。本文介绍了该控制电路的原理,温度信号的采集电路,去干扰电路,功率放大电路,模数转换及显示电路,LM35的原理、电压比较器的工作原理。
关键词: 温度控制温度测量 LM35应用电压比较器
Design of temperature control circuit

Abstract
In electronic technology rapid development today,the electronic observations and control technology research and the project apply by spread the military and industrial production each department and more and more many is valued by people. The electronic observation and control technology appearance, caused traditional the electronic surveying in the principle, the function, the precision and the automaticity has had huge change, caused the scientific experiment and the application project automaticity can obviously enhance.
Temperature is one of important parameters in industrial production and scientific experiment course. In metallurgy, machinery, material, chemical engineering, petroleum and the course of heat treatment, the control effect for temperature directly affects service life and the quality of product. Therefore temperature control is the technology of a key in every key of temperature control lies control .Temperature measure is that the more in two aspects of to measure and to parison of this respect and the foundation of temperature control ripen.
It presents the designing of the analog circuit on LM35 temperature sensor and the editing and the debugging of the whole temperature control circuit .In this paper, it interview the principle of the temperature control circuit, temperature measure circuit, anti-jamming circuit, frequency power arnplifier and RAMDAC the t