The Research Of Temperature Control System On Using Electric Heating Film Of The Building

Each year with the arrival of the winter heating season, the northern cities of PM2.5 values are extraordinary. Therefore, innovate the heating way and uses the new heat source, to reduce energy consumption, protect the environment, and build a conservation-minded society is of great significance. Electric heating film as a controlled object in this topic, it changes the traditional coal-fired central heating. Electric heating membrane efficiency can achieve 98% above, and uses the surface type heating way. This way can make indoor temperature become more average, it can satisfy the demands for comfort. At the same time, the electro thermal film heating system has no noise and emissions. It is not harm the human body, and it is clean and environmental protection. This topic is the project of Zhong Hui co., LTD., and Harbin University of Science and Technology. The electric heating film temperature control method can realize the precise control of indoor temperature, at the same time the rationalization of the man-machine interface makes operation more convenient, for the application of electro thermal film towards digital, intelligent development laid a solid foundation.This article through the analysis on the advantages and disadvantages of the PID algorithm and fuzzy algorithm, using fuzzy rules to setting of PID parameters of fuzzy PID method has a good effect. Using MATLAB to PID control, fuzzy control and fuzzy PID control related simulation performance and anti-interference ability. After comparing the study found that the fuzzy PID has strong stability, fast response speed, overshoot and steady-state error is very small. This control can obtain good effect.Based on the practical background, Through the analysis of electric heating film temperature control scheme, and combined with the demand of the Zhong Hui limited liability company. In the end, the choice of Siemens S7-300 series PLC as electro thermal film temperature control system control core, and chooses microcontroller STC89C52 and A/D conversion chip MAX186 to realize the collection of 16 channels analog. It can through the PLC analog output control voltage regulator to adjust the power of electric heating film. Schneider touch screen as the display device. Through the comparison of PID, fuzzy and fuzzy PID, the system chooses the fuzzy PID control algorithm. It has ability to realize accuracy and stability of the system. Using STEP7 programming software for the software programming, selects the Ethernet communication to multiple touch screen and a communication between the PLC.