Hierarchical Localization of Sensor Network for Infrastructure Monitoring
Hierarchical Localization of Sensor Network for Infrastructure Monitoring
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DOI：
10.1061/(asce)1076-0342(2008)14:1(15
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发表时间：
2008-03
影响因子：
3.3
通讯作者：
Masayuki Saeki;K. Oguni;J. Inoue;M. Hori
中科院分区：
文献类型：
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作者：
Masayuki Saeki;K. Oguni;J. Inoue;M. Hori
大规模传感器网络的定位(每个传感器节点的位置确定)是将网络感知技术应用于基础设施监控的一个重要问题。提出了一种适用于大规模传感器网络的分层定位方法的概念和实现方法。该系统由带有低价L1 GPS接收器的父节点和带有声学测距装置的子节点组成。通过称为逆Delaunay算法的分布式算法，基于声波测距来估计子节点之间的相对位置。该算法同时对所有节点进行定位，从而抑制了定位误差的积累。在父节点上的GPS的帮助下，相对本地化的子传感器节点被赋予全局坐标。尽管成本合理，但GPS定位的稳健性和精确度通过使用“几乎静态”的假设得到了极大的提高，这适合于基础设施监测。这种分层定位方法在由现成传感器平台组成的系统中实现，并进行了现场实验以评估系统的性能。
Localization (determination of the position of each sensor node) of a large scale sensor network is an important issue for applying network sensing technique to infrastructure monitoring. This paper presents a concept and an implementation of the hierarchical localization method applicable for large scale sensor network. This system consists of parent nodes with a low priced L1 GPS receiver and child nodes with an acoustic ranging device. Relative positions between child nodes are estimated based on acoustic ranging through a distributed algorithm, called the inverse Delaunay algorithm. This algorithm localizes all the nodes simultaneously; thus, the accumulation of the error in the localization is suppressed. Relatively localized child sensor nodes are given global coordinates with the help of GPS on parent nodes. In spite of its reasonable cost, the robustness and the accuracy of GPS positioning is highly enhanced by using the “almost static” assumption, which is appropriate for infrastructure monitoring. This hierarchical localization method is implemented in a system consisting of off-the-shelf sensor platforms, and field experiments have been conducted for the performance evaluation of the system.