Boiler water temperature control system is a typical measurement and control system. Boiler water temperature control related to the signal detection, SCM control system and other series of design content for the comprehensive training of students SCM, sensors and control technology and other aspects of comprehensive knowledge and engineering practice ability has a certain significance. Boiler is an important energy conversion equipment, with the continuous development of the industry, the boiler in all walks of life which also significantly increased the application of the boiler in the operation can be energy, chemical energy and other energy forms into a heat of steam, high temperature Liquid, etc., through the complex physical and chemical changes and a series of energy transmission process to achieve the normal operation of the boiler.

    The research topic of this paper is based on the design of the water temperature control system controlled by the single chip microcomputer. It mainly introduces the display of the temperature of the tank, realizes the real-time display and control of the temperature, the water temperature control part of the tank, and the hardware circuit of the STC89C52 single chip and the LCD Water temperature real-time detection and display, and the furnace temperature control part, by the DS18B20 furnace temperature detection, with the median filter method to take a value into the program accessor within a unit as the final detection signal, and the LCD display. To single-chip as the host, so that the temperature sensor through a mouth line and single-chip connection, coupled with the temperature control part and man-machine dialogue part to achieve the temperature detection and control.

 

Keywords: STC89C52, temperature control, DS18B20, LCD1602, hot water boiler