Research Of Centralized Control Technology For Air-conditioning Based On Embedded And Wireless Technologies

With the progress of social science and technology and the improvement of people's living standards, air-conditioning has become more and more popular. However, people are more and more stricted with the living environment and at the same time the technology of air-conditioning itself has needed to be improved rapidly. At present, the development of air-conditioning is limited by its core technology in our country. It is in an inferior position in the respect of core competitiveness. The air-conditioning control system applied is still relying heavily upon import products. The domestic products have such problems as low capability of real-time monitoring, difficulty ability of on-line transmission technology, low intelligent level and poor energy-saving effect. Therefore, it has a very important significance in the term of further improvement of air-conditioning technology to boost overall performance of air-conditioning control system.As for traditional control technology of air-conditioning, this issue will apply embedded technology and wireless transmission technologies into the design of air-conditioning control system. The following aspects have been studied and discussed:1. Introduce the external and internal researching actuality of central air-conditioning control technology and propose the designing method and idea on embedded technology and wireless transmission technologies combination of air-conditioning control features. Finally, the paper gives the design scheme of air-conditioning control system on the basis of DSP and ZigBee module.2. Choose DSP controller as the main control chip of the temperature control system, collect temperature and humidity single of each room by temperature and humidity sensor,compare it with temperature which user set and then get the volume of air supply of each room to regulate the room temperature and humidity;take the swiths of air-conditioning as control object,use ZigBee technology to establish Wireless Network based on ZigBee,choose CC2430 chip as node design,start or stop the switch and set temperature of air-conditioning adopting remote control by GSM network.3. Analysis the communication methods of overall air-conditioning control system, apply the technique of ZigBee on data communication between terminal and main nodes, choose MC39i module produced by Siemens to realize the remote communication between user and control system.4. Combine Fuzzy Control and PID Control as the method of air-conditioning temperature control systems to solve the problem of weak effect of traditional PID control used in the area of industrial applications, train offline Fuzzy Control Rules with the aid of neural network of self-study and association learning ability and creat the dynamic model of Fuzzy-PID control and simulink it. Simulation analysis has shown that the Fuzzy-PID composite parameters controller by this paper having agility and stronger adjustability, higher precision smaller overshoot and stronger robustness and correspond to the rules of the central air-conditioning control system.