ZigBee无线定位网络的精度分析及优化

Accuracy Analysis and Optimization Based on ZigBee Wireless Location CC2430/CC2431 Network

针对CC2430/CC2431的ZigBee无线定位网络误差产生的原因,对系统精度进行分析和优化.通过研究单向误差的方法,针对不同网络拓扑结构、不同参考节点间距,进行90小组实验并对数据分析拟合.当网络参数A=78,n=16,节点间距为30m、摆放方式为矩形拓扑结构的情况下,ZigBee无线定位网络的误差均值较小,定位稳定性最高.对参考节点间距为30m时的误差拟合曲线进行了分析,发现矩形的ZigBee无线定位网络区域可以近似分为误差稳定区域和误差单向偏差区域.结果表明:在构建无线定位网络时,可以根据需要选取最佳的参考节点间距,并对有误差的区域进行补偿,从而提高ZigBee无线定位网络的可用性,降低其使用难度.

This study aims to study the error reasons of CC2430/CC2431 ZigBee wireless location network, system accuracy is analysed and optimization is made by method of unidirectional errors. For different network topologies,different reference node spacing, 90 group experiments are made and data is analyzed. The results show that, when the default network parameters A= 78, n= 16, the node spacing is set to 30 m and nodes are set in rectangular topology, the ZigBee wireless positioning error of the network mean minimum positioning stability is highest. While error fitting curve of 30m spacing of the reference node is analyzed,it is found that a rectangular ZigBee wireless positioning network area can be divided into the error stable region and error check deviation area. These results suggest that the selection of the reference node spacing can be carried out according to the size of the need to build a wireless positioning network, and to compensate for the error area. Thereby the availability of ZigBee wireless location network is improved,the difficulty of using the ZigBee wireless network is reduced.