信标节点链式部署的井下无线传感器网络定位算法

针对煤矿井下巷道狭长，信号多径效应明显，接收信号强度（RSSI）测距算法受井下环境影响大，定位精度低的情况，提出了一种信标节点链式部署结构下的动态RSSI测距算法，该算法以信标节点间的距离和他们间测量到的RSSI值为参考，计算巷道内实际环境下的路径衰落指数，以提高RSSI测距算法对环境的适应性。实验结果表明，在相同的实验环境下，该算法定位精度优于RSSI定位算法，能够满足井下人员定位的要求。

Localization algorithm of beacon nodes chain deployment based on coal mine underground Wireless Sensor Networks

Since the coal mine tunnels are always very long and narrow, multipath effects of radio signal in tunnels are produced and low positioning accuracy of Received Signal Strength Indicator (RSSI) location algorithm is achieved. A dynamic RSSI location algorithm is proposed based on the beacon nodes chain deployment of tunnel Wireless Sensor Networks and the algorithm takes the distance and the corresponding RSSI between the adjacent beacon nodes into account to calculate the actual path loss parameter in the tunnel, thus improving the environmental adaptation of the location algorithm. The simulation shows that the proposed that the effect of proposed method is more precise than RSSI under the same environment and can meet the requirements of underground person position.