针对目前无线传感器网络覆盖研究中单纯进行区域覆盖或目标覆盖而将两者分立的情形,提出了一种视觉传感网络混合覆盖算法.该算法基于有向感知模型,利用虚拟势场使节点在待监测区域自组织地进行位置移动和感知方向转变,在完成对覆盖质量要求较高的热点目标多重、优先覆盖的同时最大程度地覆盖整个待监测区域.仿真实验表明,该算法自组织能力良好,能有效满足热点目标和整个待监测区域对覆盖质量的要求,有效地利用了网络资源.%To deal with the separate situation of research on area coverage or target coverage in wireless sensor networks, this paper presented a mixed algorithm for VSN. Based on directional sensing model, the algorithm used the virtual potential field to make the sensor nodes shift positions and change directions automatically in monitoring area. With the completion of multiple prior coverage of hot targets which needed higher quality requirements, the algorithm could maximize the coverage rate throughout the monitoring area. Simulation experiments show that the algorithm has a good ability of self-organizing. It can satisfy the requirements of coverage quality of the hot targets and the whole monitoring area and save resources effectively of the network.
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