Research And Application Of Location System Based On ZigBee Wireless Sensor Network

Wireless sensor network has the functions of perception,computation and wireless communication.It is a new kind of wireless communication technology in recent years,which has the advantages of low cost,low power consumption and easy networking.Wireless sensor network localization technology can meet people's needs of location service in special environment,make up for the lack of satellite positioning,and has very high research value.This paper studies wireless sensor network technology,compares several commonly used wireless location technology advantages and disadvantages,and selects ZigBee communication technology to build wireless sensor network location system.According to the principle of ZigBee communication technology,the hardware development platform is designed by using CC2430\CC2431 chip.After go into details of localization algorithm analysis,there exist four problems on engineering application of RSSI positioning technology,such as RSSI signal parameter change,NLOS node interference,RSSI signal interference and three circle location relationship changing.Author through the optimization algorithm to solve the above problems and using MATLAB simulation.The embedded software of node is improved according to the optimization algorithm.Test the location system of ZigBee Wireless Sensor Network,the results show that the improved algorithm can reduce the multiple types of interference and the positioning accuracy of the system is within 1 meters.The final design of two application scheme based on ZigBee wireless sensor network location system.