锅炉温度监测系统毕业设计.doc

摘要 锅炉作为一种重要的热能动力和主要的能源转换设备，在工业和民用取暖方面应用广泛。温度是现代工业中一个非常重要的技术参数，对于锅炉来说也是一个非常重要的参数，尤其是对于冬季供暖来说，温度尤为重要。随着工业技术的发展，传统燃煤锅炉在温度的检测与控制方面不能实现自动化控制，不能使燃料得到合理利用的不足越来越明显。并且，随着各种以清洁燃料的锅炉的不断发展，对于燃煤型的锅炉的改造要求也在不断提高。 本设计针对传统锅炉设计的温度监测系统，是将通过热电偶采集到的锅炉炉膛温度信号，经过放大滤波以及模数信号转换等处理后，把温度信号传递给单片机，由单片机对采集到的信号做相应处理。同时，通过时钟芯片显示时间点。在电路设计中，为了提高测温精度，需要对热电偶进行冷端补偿，以弥补热电偶冷端处于室温环境时造成的误差。在软件设计过程中，利用数字滤波进一步对干扰信号滤波处理温度值，同时采用PID算法实现对炉膛温度的控制。 关键词：锅炉；单片机；热电偶；温度信号 ABSTRACT Boiler as an important and primary energy for thermal energy and power conversion equipment, widely used in industrial and civil heating. Temperature is a very important technical parameter in modern industry, is also a very important parameter for boiler, especially for winter heating, the temperature is particularly important. With the development of industrial technology, the traditional coal-fired boiler in terms of temperature detection and control cant achieve automatic control, cant make reasonable use of the fuel shortage is more and more obvious. And, with the continuous development of all kinds of boiler clean fuels, the reconstructive requirement for coal fired boiler has been improved. Traditional temperature monitoring system, boiler design, the author of this paper is to put the boiler furnace were collected by thermocouple temperature signal, after amplification of filtering and module of signal conversion, the temperature signals to single chip microcomputer, by single-chip microcomputer to do corresponding processing to the collected signals. At the same time, the point in time by the clock chip. In circuit design, in order to improve the precision of temperature measurement, need to cold junction compensation of thermocouple, to make up the error resulted from the thermocouple cold end at room temperature environment. In the process of software design, the use of digital filter further to interfere with the signal filtering processing temperature, at the same time, using PID algorithm to realize the control of the furnace tem