基于无线网络的声能量模型定位算法与实验

Localization Algorithm and Experiment of Wireless Sensor Network (WSN) Acoustic Energy Model

无线传感器网络(WSN)的节点定位运算量大、计算效率低是目前制约其大规模推广的瓶颈。采用声音信号能量转换模型,运用加权系数排序的方法改进算法进行传感器节点的定位。实验结果表明:当权系数平均值取位于最少方程权系数平均值和最多方程权系数平均值的中间值时,定位效果较好,同时又能够大量减少参与定位的方程个数。系统在不影响定位精度(误差非常小)的情况下,改进算法的定位方程个数减小了90%以上,有效节省了计算空间和计算效率。

The current wireless sensor network（ WSN） has the problem of low efficiency of calculation. It is still the bottleneck of promotion. Audio signal energy conversion model is used to localize sensor nodes,the method of weighted coefficient is used to reduce calculation in this paper. The experimental results show when the weight average value is in the middle of minimal and maximal values of coefficient of the equation number the orientation effect is good,at the same time,the number of positioning equation can decrease. In the case that positioning accuracy maintains,the improved algorithm reduces more than 90% number of the positioning. It effectively saves the space and the calculation efficiency.