基于ZigBee的室内手持定位系统的设计

Design of Indoor Handheld Location System Based on ZigBee

针对大规模复杂室内空间的实时位置服务这一室内定位难题,提出了一种基于ZigBee无线传感器网络的室内手持定位系统的设计方案;该方案采用TI公司的CC2430、CC2431搭建无线定位网络,根据CC2430接收信号强度指示(RSSI)和通信距离的映射关系实现定位功能;在此基础上,结合地理信息系统(GIS),基于VS2005平台开发Windows Mobile环境下的人机交互界面;用户可从手持终端的人机交互界面上实时、直观地获得其自身和目标节点当前所在的位置信息;该系统定位精度可达1.2 m,可用于复杂的室内环境,如机场、地下停车场、展览大厅和大型商场等,具有成本低、功耗小、定位精度较高的特点。

The real-time location service for large-scale complex indoor environment is a problem of indoor location at present. This paper puts forward a new scheme of indoor handheld location system based on ZigBee. The wireless location network was built with TI CC2430 and CC2431 in this scheme. The location function was realized according to the map relationship of the CC2430 receive signal indication （RSSI） and the communication distance. On this basis, a friendly human-machine interactive interface under Windows Mobile environment was developed based on VS2005 platform combined with geographic information sys- tems （GIS）. The user who holds the handheld terminal can instantaneously and intuitively learn the cur- rent position of him and target node from an electronic map on the human-machine interactive interface. The average location error of the system is 1.2 meters. The system which has a low cost, low power con- sumption and higher positioning accuracy can be used for complex indoor environment, such as airport, Underground Park, exhibition hall, large shopping malls and so on.