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石家庄铁道大学四方学院毕业设计

毕业设计

智能电加热炉定时温控系统

Intelligent Controller Regular Furnace System

2010 届 电气工程 系

专 业 电气工程及其自动化

学 号 20066408

学生姓名 贺赞

指导教师 范伟

完成日期 2010年6月 1 日

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摘要

近年来随着科技的飞速发展，单片机的应用正在不断地走向深入，同时带动温度控制检测的日新月异。在自动控制和实时检测的单片机应用系统中，单片机往往是作为一个主要部件来使用。

我们设计的内容为智能电加热炉定时控制系统。本设计介绍了采用AT89C51芯片、A/D转换、LCD显示技术以及AD590温度传感器等组成的智能电加热炉定时控制系统的设计方法和工作原理。该设计给出了单片机测量温度的基本电路，分析了测量算法，给出了软件流程图，并汇出了部分汇编的原程序。噪音小，电路简单可靠，使用效果非常好。传感器将模拟信号输送给芯片ADC0809，进行A/D转换把模拟信号转换成为数字信号,软件实现24小时计时，加热炉会在6-8点,18-22点自动启动加热，在此期间如果温度超过90℃停止加热，低于75℃启动加热。报警系统在智能加热炉温度高于95℃时发声报警，提醒主人及时进行处理。温度感应器选用高度集成的AD590，对LED八段数码管显示温度值组成的数字温度计的硬件和软件进行了探讨和研究。实现了测量范围0℃～+100℃，精度0.5℃，能一目了然被测物体温度的LED数码显示温度计。

在当今重视环境和提高人民生活水平的氛围下，温度的准确测量影响着人们的生活和生产，准确快速的测出物体温度然后对温度进行有效的控制是必要的，所以对定时控制的研究具有重要的理论意义和实际应用价值。

关键字：MCS-51；自动控制系统； LCD静态显示；温度传感器。

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Abstract

These years along with computer in social various domains seepage,The monolithic integrated circuit application unceasingly is movingtowards thoroughly，Simultaneously brings the temperature examination the timed controlheating furnace technology date crecent moon profit renewal. In real-time examination and in automatic control monolithicintegrated circuit application system, The monolithic integrated circuit often is took a core part uses.

This design content is the Electric heating stove .It makes up of four parts that the show of the AD590 temperature measure and detect, A/D transform, AT89C51chip, LCD display .The arithmetic of measuring temperature is analyzed .The flow chart of soft is mentioned. It a lists sectional assembly sourer program fore reference..with low noises,it is reliable that the circuit is simple, the result of use is very good.The Temperature gathering give the voltage signal after the operational amplifier the simulated signal transportation for chip ADC0809, carries on A/D to transform the simulated signal transforms into the digital signal, The alarm system is higher than 95℃ when the temperature emits sound reports to the police, reminds the master promptly to carry on processing, when the electric refrigerator gate opens the time to surpass the 2min Times alarm also to remind should promptly close a door.The temperature sensor then chooses the high degree that gather with the AD590,adoption LED eight figureless tube manifestation temperature value. Completed diagraph 0℃~100℃, accuracy 0.5 ℃. It is clear at a glance to is measured the arithmetic figure thermometer of the object temperature.A practical circuit base on SCM to measure temperature is given .

Key words: MCS-51; automatic control system;LCD static vision ;emperature transducer

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目录

第1章 绪论 ······························ 1

1.1 智能电加热炉定时控制系统的目的和意义 .......................................................................... 1

1.2 国内外研究现状 ....................................................................................................................... 2

1.3 论文研究内容及创新点 .......................................................................................................... 2

1.4 本章小结 ................................................................................................................................... 3

第2章 智能电加热炉定时控制系统硬件选择 ················ 4

2.1 选择温度传感器 ....................................................................................................................... 4

2.2 选择A/D转换器 ....................................................................................................................... 7

2.3 选择单片机 ............................................................................................................................... 9

2.3.1 核心部件单片机的选择 ................................................................................................ 9

2.3.2 AT89C51单片机简介 ................................................................................................... 11

2.4 键盘电路 ................................................................................................................................. 13

2.5 输出负载电 …… 此处隐藏：13350字，全部文档内容请下载后查看。喜欢就下载吧 ……