基于山区地形的无线传感器网络三维定位机制∗

摘要

This paper presents a non-dimensional distance wireless sensor network localization algorithm based on closer points projection correction which use the mountainous terrain mesh data for the problem that the localization error is large when 3D DV-hop algorithm is carried out in the actual terrain. After get the location of a node by using 3D DV-hop algorithm,search three points near the location of the node which is non-collinear and on the mountain-ous terrain mesh and make the node project toward the surface which is determined by the above three points. Pro-jection point is the node’s location after correction. Multi-scene experiments show that this method can greatly re-duce the position error.%针对三维DV-hop无线传感器定位算法在实际地形中定位时误差较大的问题，提出了根据山区地形的网格数据进行较近点投影校正的无线传感器网络非测距三维定位算法。经典的三维DV-hop算法求出未知节点位置后，在该节点附近搜索3个离该节点较近且非共线的山区地形网格上的点，将该节点向上述3个点确定的面进行投影，投影点即为校正后的未知节点位置。山区地形多场景实验表明，该方法较大幅度减小了定位误差。