DC Magnetic Field Based 3D Localization With Single Anchor Coil
DC Magnetic Field Based 3D Localization With Single Anchor Coil
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DOI：
10.1109/jsen.2019.2961365
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发表时间：
2018-12
影响因子：
4.3
通讯作者：
Ryo Shirai;Masanori Hashimoto
中科院分区：
文献类型：
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作者：
Ryo Shirai;Masanori Hashimoto
近年来，室内导航、物联网、智慧城市等对室内定位技术的需求迅速引起人们的关注。然而，现有的室内定位技术，如基于Wifi的方法和基于多锚的方法，安装成本高，健壮性不足。提出了一种基于直流磁场的单锚线圈稳健室内三维定位方法。该方法同时利用地磁和人工产生的直流磁场来估计传感器的位置。该方法在最小配置下不需要任何预测量或多个锚节点，因此可以以较低的安装成本实现即时三维定位。本文通过数值模拟和原型传感器节点对线圈产生的磁场进行了分析。我们在假设桌面规模和房间规模应用的情况下对所提出的方法进行了实验评估。对于桌面规模的应用，该方法在250 mm的范围内估计3D位置，最大误差为6.5 mm。对于需要用多个锚圈扩展覆盖区域的房间范围应用，该方法在3.0m$\x 1.5m区域内定位传感器的最大误差为14.7 cm。
Indoor localization technologies are rapidly attracting attention in recent years since those are required by indoor navigation, IoT, smart city, etc. However, currently available indoor localization techniques, such as Wifi based method and multi-anchor based method, require high installation cost and have an insufficient robustness problem. This paper proposes a DC magnetic field based robust indoor 3D localization method with a single anchor coil. The proposed method estimates the sensor position from both geomagnetism and artificially generated DC magnetic field. The proposed method does not require any pre-measurement or multi-anchor nodes in the minimal configuration, and hence it can realize instant 3D localization with lower installation cost. This work analyzed the magnetic field generated by a coil both with numerical simulation and prototyped sensor node. We experimentally evaluated the proposed method supposing tabletop-scale and room-scale applications. For table-top scale applications, the proposed method estimates the 3D position with the maximum error of 6.5 mm in the range of 250 mm. For room-scale applications, which require coverage area expansion with multiple anchor coils, the proposed method localizes the sensor with the maximum error of 14.7 cm in 3.0 m $\times1.5$ m area.