基于ZigBee网络的移动节点定位技术研究  

Study on Positioning of Mobile Node Based on ZigBee

作　　者：赵山[1] 彭力[1] 

机构地区：[1]江南大学物联网工程学院,江苏无锡214122

出　　处：《测控技术》2014年第10期51-55,共5页Measurement & Control Technology

摘　　要：无线传感器网络技术中,ZigBee技术以其低价格、低功耗、组网简单等优点被广泛地应用于移动节点定位研究中。随着TI推出业界首款带硬件定位引擎片上系统(SoC)解决方案CC2431,移动节点定位可以通过硬件来实现。但基于ZigBee的RSSI无线定位精度受定位环境影响,会造成很大定位误差。针对此问题,分析了影响定位精度的两个阶段:测距阶段和计算阶段。测距阶段对信号传输模型中的两个关键参数A和n值进行改进和优化,以得到更符合实际环境的参数值。计算阶段采用修正权值三角质心算法以提高主要数据的权重,避免次要数据的影响。通过仿真测试发现,本算法定位精度高,稳定性好,具有较好的实用价值。In the wireless sensor network technology, ZigBee technology for its advantages of low price, low power consumption, simple networking is widely applied in the mobile node localization studies. As the TI introducing the first industry with hardware location engine on a chip （SoC） solution system CC2431, mobile node localization can be implemented through hardware. But RSSI wireless positioning accuracy based on Zig- Bee is affected by environment and cause large positioning error. According to this problem, two phases that measuring and calculating, are analyzed. Two key parameters of the signal transmission model A and n values are improved and optimized at measuring phase to get the parameter values conformed to the actual environ- ment. Calculation phase uses modified weighted centroid of triangle localization algorithm to improve the weight of primary data and avoid the influence of the secondary data. Simulation test shows that the modified algorithm has high localization accuracy, good stability, and good practical value.

关 键 词：无线传感器网络 ZIGBEE技术 移动节点定位 RSSI测距 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]