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针对煤矿井下环境复杂,传统DV-Hop节点定位算法无法满足无线传感器网络定位需求的问题,设计了一种改进的DV-Hop算法,引入分级节点和扩展信标节点,采用分级定位,通过已定位的未知节点作为信标节点参与定位运算,利用三角定理和1跳距离对未知节点与信标节点之间的跳段距离进行修正。仿真结果表明:改进算法有效提高了节点的定位精度,能够满足井下传感器节点的定位需要。
Aiming at the complex environment in coal mine and the traditional DV-Hop node location algorithm can not meet the requirement of wireless sensor network positioning, an improved DV-Hop algorithm is proposed. The algorithm introduces hierarchical node and extended beacon node, adopts hierarchical positioning, Unknown node as a beacon node to participate in the positioning operation, and uses the triangular theorem and 1-hop distance to correct the hop distance between the unknown node and the beacon node. The simulation results show that the improved algorithm can effectively improve the positioning accuracy of the node and can meet the positioning needs of downhole sensor nodes.