链式无线传感器网络移动目标二元协同感知策略

Duality cooperative sensing strategy of moving target for chain-type wireless sensor networks

对链式无线传感器网络中移动目标的感知是对运动目标跟踪定位的基础,如何在节点能量有限情况下准确感知移动目标是其主要技术之一。为此,提出了一种基于节点相邻步距间协作的二元协同感知策略。首先提出目标感知节点集求解算法和目标运动感知模型;其次,融合当前感知概率和历史感知经验,建立移动目标感知概率求解模式,并相应地提出了二元协同感知算法;以矿井巷道内的人员定位监测为工程仿真实例,进一步进行了二元协同感知策略、全节点感知策略与单节点感知策略的性能比较,结果表明,二元协同感知策略能有效解决单个感知策略易存在检测漏洞与全节点感知策略通信量大的缺点,提高移动目标的感知概率,延长了网络的生存寿命。最后,以建筑物楼道长廊中的人员定位监测作为实际环境测试平台,测试了二元协同感知策略的性能变化,其结果显示出实际环境测试结果与理论仿真值变化趋势基本相同,从而验证了二元协同感知策略的实际有效性。

Chain-type wireless sensor networks are special wireless sensor networks applied to monitor narrow and long environment.Sensing moving targets is the basis for locating and tracking moving targets.This paper proposes a duality cooperative sensing strategy based on the adjacent step collaboration behavior of the sensing nodes.Firstly,the sensing node set solving algorithm and motion sensing model of the moving target are built;the moving target sensing probability solving mode and a duality cooperative sensing algorithm are also established.Further,the personnel location monitoring in a mine tunnel is taken as an engineering simulation example;and the performances of duality cooperative sensing strategy,all-node-sensing strategy and single-node-sensing strategy are compared.Experiment results indicate that duality cooperative sensing strategy can overcome the drawback of existing detection hole easily in single-node-sensing strategy and heavy traffic load in all-node-sensing strategy,and also increase the sensed rate of moving targets and prolong the network survival time.Finally,the practical personnel location monitoring test in a building corridor was implemented,and result shows that the test results are similar with the theoretical simulation results.