Research On Indoor Positioning System Based On Data Fusion Technology

China's current technology in the outdoor positioning technology available GPS and the Big Dipper,but there isn't too much can be use for the practical application of technology in the indoor positioning.With the development of Internet of Things technology,we need for accurate indoor positioning in many different areas,including large shopping malls navigation,article tracking,school student positioning,etc.Under this demand,if outdoor positioning technology can not provide sufficient accuracy of positioning data,Must use the indoor positioning technology to complete the positioning.Professional indoor positioning system is generally high cost,in the case of large-scale indoor layout of the application where the cost is difficult to control,in order to solve the above contradictions,low-cost indoor positioning technology research has been a lot of research scholars of all ages in recent years.This article relies on the Changchun Science and Technology Program Project "High-rise building rescue trapped in the accurate positioning and guidance system research" and Changchun City Science and Technology Project "based on the Internet of intelligent building information integration key technology research and application platform construction",it designed and implementation a set of indoor positioning system based on inertial system and ZigBee positioning system.In order to improve the positioning accuracy of ZigBee positioning,the system adds inertial system on the basis of ZigBee positioning technology,through the integration of inertial system data and ZigBee positioning system data to get more accurate positioning results,which can obtain a higher positioning accuracy in the case of the low-cost placement conditions.After testing,the indoor positioning system designed in this paper can greatly improve the problem of poor positioning accuracy of a single ZigBee indoor positioning system,According to the measured data of inertial system and indoor positioning data based on RSSI through the Kalman filter,the original ZigBee based indoor location system to improve the accuracy from 2 meters to 50 cm in precision,greatly improve the positioning effect.It has certain application value and research value.