1、2010 级课程设计 锅炉自动给水系统 1 前前 言言 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
2、 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：关键词：STC89C52 单片机; 液位控制; 温度控制;报警 2010 级课程设计 锅炉自动给水系统 2 PREFACEPREFACE In modern society, with the development of industry, the residents living area of the centralized heat supply demand is also g
3、rowing, 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 p
4、ressure 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 pro
5、gress 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 mathematica
6、l 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, s
