锅炉自动给水课程设计

前言

本文主要设计了一种基于单片机的锅炉自动给水系统，本系统以8位单片机STC89C52RC 作为系统控制处理器，采用液位上下限传感器和DS18B20采集信息，采用数码管和LCM作为显示设备，采用WT588D语音警示及报温。系统具有液位和温度自动检测、报警和控制等功能。

本系统在设计中主要由液位检测、温度检测、按键控制、液位控制、温度控制、显示部分、故障报警等几部分组成来实现液位和温度控制。用液位传感器检测液位，用DS18B20温度传感器来检测液温，用二个控制按键来实现按健控制，用四位7段LED显示器和LCM128*64来完成显示部分，用继电器来控制水泵的启停。本设计用单片机控制易于实现锅炉液位、温度控制而且有成本低、程序易于调试、一部分出现故障不会影响其他部分的工作、维修方便等优点。

关键词：STC89C52单片机; 液位控制; 温度控制;报警

PREFACE

In modern society, with the development of industry, the residents living area of the centralized heat supply demand is also growing, steam boiler capacity continues to increase, the operation process requirements more stringent, the boiler liquid level control of a direct impact on people and equipment safety. Low level may make the boiler phenomenon of dry combustion, liquid level is too high will make the boiler steam pressure is too high, danger, the traditional liquid level control cannot remote centralized control, low degree of automation, precision shortcomings, and by manual operation has been unable to adapt to, control system and the necessity of reform unceasingly along with the science and technology progress of controlled object, more and more complex, people on the requirements of control precision improvement. As a result of the controlled object and the process is nonlinear, time-varying, strong coupling between different parameters, random noise and other factors, makes an accurate mathematical model of object creation becomes difficult. In front of these complex systems, the traditional control methods can not meet the control accuracy, and poor stability of the system. Better to boiler automatic control with single-chip microcomputer technology, at the same time, the rapid development of automatic control technology, SCM and its peripheral chip to realize boiler liquid level control is possible, but also become a development trend, single chip not only has small volume, convenient installation, function relatively complete advantages, but also have the very high price ratio, thus wide application prospect, and contribute to the discovery of a possible failure, fire water supply system and realized by microcomputer automatic control and regulation, will ensure the normal supply of water supply boiler, to maintain the stability of system, guarantee the safe and economic operation. This paper is to use single chip is a pot which has high

practical value and superior

it.

KEYWORDS：Single chip computer; peripheral chip; the boiler level control; automatic control and regulation to ensure the safe and economic operation