毕业设计论文超温度控制电路

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 _ ______ ___

学号_____

年级 ___ _________ _

专业 ___电子信息工程_____

指导教师 ___

职称 ___

完稿时间

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 field.The key of temperature control lies control .Temperature measure is that the more in two aspects of to measure and to technical comparison 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 theory of LM35 chip and voltage comparator.

Keyword: Temperature control Temperature measure LM35 application V oltage comparator

目录

摘要

绪论 (6)

1温度控制电路 (7)

1.1 设计要求 (7)

1.2 方案选择与论证 (7)

2基于模拟电路的温度控制电路

2.1温度信号检测及显示部分

2.2温度控制部分

2.3所用器件介绍

2.3.1 LM35精密集成电路温度传感器

2.3.2 三位半LED显示A/D转换器ICL7107

3 温度信号的检测和信号调整 (11)

3.1温度侧量及信号调理电路的设计

3.1.1选用合适的传感器

3.1.2设计信号调整电路

3.3温度测量的误差分析

4 温度控制系统的设计 (19)

4.1 控制系统

4.2 电压比较技术 (21)

5 显示电路的设计 (28)

5.1 显示电路原理 (28)

5.2 显示电路设计 (28)

6总结 (29)

6.1干扰分析

6.2总结与改进

参考文献 (29)

附录A：系统原理图与pcb版图 (35)

致谢