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毕业设计（论文）

题目电加热炉温度控制系统硬件设计

英文题目 The Hardware Development for

Controlling Temperature of an Electronic Heating

Furnace

学生姓名

班级

指导教师

专业自动化

二零零六年六月

毕业设计(论文) 摘要

I

Abstract

This paper with the temperature control of electric heating furnace for the

control object, by virtue of the object characteristic of analysis for

temperature control of electric heating furnace then to certain the hardware

system of design and control solutions for the heating furnace.In all walks

of control realms,for example: The metallurgy,chemical engineering,machine

and other industry control field, electric heating furnace got an extensive

application, its temperature control has characteristics of non-linear,big

lag,big inertial,time-variable and warm up unilateralism etc. Use

bidirectional SCR that Traditional way to control temperature of heating

furnace is a phase shift style thich make no doubt of could control temperature

automatically but be proved to that could produce the fearfulness intermediate

frequency interfere result in a common disaster to power system during

transportatiion.On the contrary control, by using micro-chip computer assort

with the slide state raley (SSR) to control temperature is a steady , reliable

and advanced way for the intact sine wave which couldn't disturb the power

system. In order to reduce and be sure of high precision ,we use ATMEL AT89C52

micro-chip computer ,which be prove a wonderful ability of anti-jaming,to

control the power of radiation resistance which could infect temperature

directly by order the proportion of ON/OFF of SSR,The measurement part we

select the thermocouple (platinum rhodium 10- platinum) to detect the variable

temperature.and to achive automatic control.This control system possess

strongpoint of low cost, high control accuracy , good reliability and good

resistance to interferenceetc,so it have some worthwhile to put on

application.

Keywords

electric heating furnace； AT89C52；PID close-loop control thermocouple

(platinum rhodium 10- platinum)；SSR

毕业设计(论文) 目录

II

目录

摘要与关键词..........................................................I

英文摘要与关键词.....................................................II

绪论..................................................................1

1. 系统总体方案设计...................................................3

1.1 系统的设计原则 .................................................3

1.2 系统的设计步骤 .................................................3

1.3 系统的工程设计与实现 ...........................................3

1.4 系统的总统方案设计 .............................................4

1.5 硬件的工程设计与实现 ...........................................4

2．电加热炉温度单片机控制系统设计 ....................................6

2.1 系统概述........................................................6

2.2 系统的总体结构..................................................6

2.3 系统的基本工作原理..............................................6

2.4 系统的技术指标..................................................7

3．温度控制硬件系统设计 ..............................................8

3.1 硬件电路的设计系统规范...........................................8

3.2 芯片功能介绍....................................................8

3.3 分模块详述系统各部分的实现方法.................................20

3.3.1 温度采集电路...............................................20

3.3.2 控制芯片...................................................22

3.3.3 加热器控制电路.............................................27

3.3.4 抗干扰电路(看门狗电路) ....................................28

3.3.5 A/D 转换器.................................................29

3.3.6 温度检测和变送器...........................................34

3.3.7 固态继电器控温电路.........................................35

4．系统软件与模型 ...................................................39

4.1 数学模型建立...................................................39

4.2 控制系统的算法设计.............................................39

4.3 编程模型及数据结构.............................................40

4.4 软件设计.......................................................41

剩余63页未读，继续阅读

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