基于改进虚拟势场的煤矿井下WMSN覆盖增强算法  

A coverage-enhancing algorithm based on improved virtual potential field for WMSN in underground coal mine

作　　者：韩睿松 杨维[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《煤炭学报》2015年第4期959-964,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51474015);国家"十二五"科技支撑计划资助项目(2013BAK06B03)

摘　　要：针对煤矿井下无线多媒体传感器网络(Wireless Multimedia Sensor Network,WMSN)覆盖问题,提出了一种基于改进虚拟势场的覆盖增强算法。在分析方向可调感知模型、煤矿巷道带状结构特点及照度特点的基础上,提出了煤矿井下WMSN"有效覆盖"问题。针对有效覆盖问题,引入虚拟目标引力提升重点区域有效覆盖效果。针对传统虚拟势场算法可能出现因局部极小导致覆盖增强效果下降的问题,在分析方向可调感知模型感知区域相交特性的基础上,改进了斥力函数,引入了相邻节点的共同覆盖率引导节点调整感知方向,从而实现区域的有效覆盖。仿真实验表明:对比已有的区域覆盖增强算法,采用所提出的基于改进虚拟势场的覆盖增强算法可有效消除感知重叠区和盲区,实现了井下巷道的高效区域覆盖。A coverage-enhancing algorithm based on improved virtual potential field was proposed for a wireless multimedia sensor network in underground coal mine. The characteristics of underground mine roadways and the direction adjustable sensing model were initially analyzed,which brought the issue of'effective coverage'for the wireless multimedia sensor network in underground coal mine. Then by introducing the concept of 'virtual attractive force',the coverage rates of target areas increased. To overcome the deficiency of local minimum which could reduce the optimization effect of coverage with traditional virtual potential field based algorithm,the proposed algorithm improved the functions of virtual repulsion force by taking the joint coverage rate of neighbor nodes into consideration to assist the adjustment of perception directions of the nodes. The simulation results showed that,compared with the existing coverage-enhancing algorithms,the proposed algorithm could eliminate the sensing overlapping regions and coverage holes,thus enhance the coverage performance of the wireless multimedia sensor network in underground coal mine.

关 键 词：无线多媒体传感器网络 煤矿井下 覆盖增强 虚拟势场 共同覆盖率 

分 类 号：TD76[矿业工程—矿井通风与安全]