基于ATC89C51单片机温度控制系统设计(LCD显示).doc

基于ATC89C51单片机温控系统设计设计(LCD显示)

基于ATC89C51单片机温度控制系统设计(LCD显示)

摘 要

温度控制是一个恒定的话题。自古以来，人类生活的许多方面都与温度控制有关，尤其是水温控制最多。随着科学技术的发展，现代社会对水温的控制越来越精细。有鉴于此，结合本课题，我选择的控制对象是浴室用水的温度控制。电热水锅炉是一种能量转换装置，将电能转化为热能，具有结构简单、无污染、自动化程度高的优点。近年来，它已成为加热的主要设备。电热水锅炉，用数学方法建立其精确的数学模型显然非常困难，因此传统的控制理论和方法控制系统有其局限性，智能控制吸收了人们的生活经验、逻辑推理规则和记忆学习的优势，在实际工程中取得了许多有价值的成果。本文最终选择了简单易行的位式控制算法。本文还选择了电锅炉控制算法的研究ATC89C51单片机设计了锅炉温度的硬件电路，包括传感器电路、继电器控制电路、温度显示电路和键盘输入电路，分别选择了传感器DS18B20温度传感器和电接点液位传感器，控制电路是通过继电器控制加热器，然后控制温度。采用了显示部分LCD显示屏。C语言程序是基于硬件电路编写的，通过C51和Protues软件联调，模拟调试，取得理想效果。

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关键词：温度控制；AT89C51单片机；DS18B20; LCD

Abstract

Temperature control is a permanent topic.Historically, many aspects of human life and temperature control is concerned, most especially to the water temperature control.Modern society, with the development of science and technology, the water temperature control is becoming more and more delicate.Because of this, collection of thistopic,Iselect the control object is the bathroomwateremperaturecontrol.Electric?boiler?boiler?is?the?device?that?convert?electricity?into?heat,?it?has?the?advantages?of?simple?structure,?no?pollution?and?has?high?automatically?degree,?which?has?become?the?main?equipment?for?heating.?For?the?electric?boiler,?because?it?is?a?nonlinear,?time-varying,?long?time-delayed,?large?inertia?and?unidirectional?rising?system,?it?is?very?difficult?to?use?mathematical?method?to?establish?mathematical?model?and?to?control?this?system?by?using?the?classical?control?theory?and?method.?Intelligent?control?has?produced?something?valuable?in?engineering?practice,?because?it?brings?in?the?good?things?such?as?the?experience,?logical?reasoning?and?memory?from?people.This paper finally chose a simple type control algorithm.At?the?same?time,?we?choose?the?ATC89C51?SCM,?and?design?the?hardware?circuit?of?temperature?and?water?level?control?of?electric?boiler,?which?includes?the?sensor?circuit,?the?relay?control?circuit,?temperature?and?water?level?display?circuit,?keyboard?circuit,?water?level?alarm?circuit.