Wireless sensor networks ( WSNs ) have some special characteristics such as placing expediently, self-organizing and strong mobility. In order to guarantee the safety in production, the nodes of the network can be put on the coal mine working face to provide real-time monitoring the condition of the large-scale equipment and the environment parameter. The coverage algorithms for variable sensing area is proposed based on the environment mentioned above, and the algorithm is simulated the support of B-spline theory and Matlab. The result shows that the degree of coverage increases as the communication radius increases; reasonable choice of the first cluster head will achieve high degree of coverage; appropriate node density can also extend the life of the network except covering the sensing area effectively.%无线传感器网络(WSNs)具有放置方便,自组织,移动性强等特点,为了保证安全生产,可以将网络中的节点放置在煤矿井下狭长工作面上,用来对大型设备的工作情况和环境参数进行监测以提供实时信息.基于上述环境,提出了监测区域可变的覆盖算法,在B样条数学理论和Matlab工具的支持下做了算法仿真.结果表明:通常情况下覆盖度随着节点通信半径的增大而增加;合理选择第一个簇首会达到较高的覆盖度;合适的节点密度不但可以有效覆盖监测区域,还可延长网络寿命.
展开▼
