The Positioning Applied Research Of Intelligent Lighting Control System Of LED Based On ZigBee

With the rapid development of the wireless network communication technology and the popularization of smart phones, the demands of indoor positioning service grow up rapidly. Especially in the airport, supermarket, restaurant, library, people often need to determine the location of the terminal equipment information. And in recent years, The pursuit of life and the enhancement of the consciousness of energy saving ushered the research of LED intelligent control system in the new upsurge. This thesis combines the LED intelligent control system based on Zig Bee network with the positioning technology and extends the positioning function without any increasing cost in intelligent lighting system hardware. The system in this thesis can not only achieve the control of LED lights but also provide the location-based information services.The thesis is mainly focused on the the following aspects:Firstly, this thesis studies the indoor localization technology based on Zigbee network and analyzes the basic theory of wireless location method,then concludes the performance of different location methods.Secondly, the design of the minimal system module based on CC2530 is achieved. The program exploitations based on Z-Stack, including communication structure between gateway and PC,Zig Bee nodes maintenance,the LED control program in Zig Bee nodes and localization algorithm procedures.Thirdly, according to the requirements analysis, this thesis achieves a intelligent lighting control and positioning system. It includes the hardware platform,the position and control procedures of Zig Bee node,PC software,Android applications and back-end server. Users can control and manage the lighting system through the VB-based PC software. The PC can display the LED lighting system in real time and control the LED switches and dimmers. In addition, it can update the LED control list when the LED is added or removed. What's more, it is able to display the position of location node and view the users trajectory. Meanwhile, the Android client by connecting to the server, uses the standard Web Socket protocol to achieve lasting long connection and realize the two-way communication with PC, so that the remote control and positioning of the indoor lighting equipment are achieved.Finally, by constructing environment for experiments in the school open area, the entire system of PC computer and the Android client have been tested for the positioning and lighting control function. Then, the function of the system is improved. The analysis and solution of the problems in system test are completed.