一种基于无线传感器网络的室内定位算法

One of Indoor Positioning Algorithm Based on Wireless Sensor Network

无线传感器网络是室内定位的关键技术之一。影响定位精度的因素有两方面:测距误差和定位计算误差。在测距阶段,为解决信号在复杂的环境中传播损耗较大而影响测量精度的问题,基于对数常态路径传播损耗模型,提出了一种环境因子的估算方法,该方法动态修正测量值,减小了因环境引起的测量误差。在定位阶段,为解决三角形质心算法对数据利用不足的缺点,提出了加权的三角形质心算法,实现了高精度的室内定位。实验表明,该算法可以实现较高精度的室内定位,具有一定的可行性。

Wireless sensor network is one of the key technologies of indoor location.Two aspects affect the positioning accuracy.One is ranging error,the other is the positioning calculation error.At Ranging stage,in order to solve the problems that signal propagation in complex environments has larger loss and affects the measurement accuracy,this paper proposed a method for estimating environmental factors based on the log-normal propagation path loss model,which can dynamicly correct measurements and reduce the measurement errors caused by the environment.At the positioning stage,in order to solve the shortcoming that a triangle and centroid algorithm cannot make full use of the data,this paper presented the weighted of the triangle and centroid algorithm to achieve a high-precision indoor positioning.Experimental results show that the algorithm can realize a high accuracy indoor positioning and is feasible.