【摘要】 分布式铁路光纤传感网受光器件、光纤连接损耗及封闭式传输架构限制,检测点数少,不易于与其它网络融合。而基于物联网技术的光纤无线传感网络可实现大规模、可扩充的现代分布式铁路光纤无线传感网络。为降低光纤无线传感网中传感器节点能耗,研究了传统的低功耗自适应分簇(Low Energy Adaptive Clustering Hierarchy,LEACH)路由算法,针对该算法引起的"能量空洞"与"网络热点"问题,基于二重异构网络,进行了路由算法的改进研究。实验结果表明,改进的路由算法能显著降低传感器节点能耗,延长其使用寿命。更多还原

【Abstract】 The distributed optical fiber sensor network was difficult to integrate with other networks for its own limits of optical devices,connection-loss of optical fibers,closed transmission structures and fewer detected points,however,a large scaled and extensible modern distributed optical fiber wireless sensor network for railways can be realized by applying the internet of things technology.The traditional LEACH(Low Energy Adaptive Clustering Hierarchy) routing algorithm was studied to reduce the energy consumption of sensor nodes in this network,in light of its insufficiencies of "energy holes" and "hot spots of network",an optimized simulation experiment was carried out based on the double heterogeneous network,proving that the energy consumption of sensor nodes reduced obviously and the service time prolonged.更多还原