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基于磁传感的自动导引车无线电力传输系统的线圈定位

Coil Positioning for Wireless Power Transfer System of Automatic Guided Vehicle Based on Magnetic Sensing.

作者信息

Liang Ce, Zhang Yanchi, Li Zhonggang, Yuan Feng, Yang Guang, Song Kai

机构信息

School of Instrument Science and Engineering, Harbin Institute of Technology, Harbin 150006, China.

School of Electrical Engineering & Automation, Harbin Institute of Technology, Harbin 150006, China.

出版信息

Sensors (Basel). 2020 Sep 16;20(18):5304. doi: 10.3390/s20185304.

DOI:10.3390/s20185304
PMID:32947993
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7571003/
Abstract

As an auxiliary function of the wireless power transfer (WPT) system, coil positioning can solve the power and efficiency degradation during power transmission caused by misalignment of the magnetic coupler. In this paper, a Hall sensor array is used to measure the change of magnetic flux density. By comparing the multisensor data fusion results with the preset data obtained from the coil alignment, the real-time accurate positioning of the receiving coil can be realized. Firstly, the positioning model of the receiving coil is built and the variation of magnetic flux density with the coil misalignment is analyzed. Secondly, the arrangement of the Planar 8-direction symmetric sensor array and the positioning algorithm based on data fusion of magnetic flux density variations are proposed. In order to avoid coil positioning misalignment caused by the unstable magnetic field distribution which is actually affected by the change of mutual inductance during automatic guided vehicle (AGV) alignment, the constant current strategy of primary and secondary sides is proposed. Finally, the coil positioning experimental platform is built. The experimental results show that the coil positioning method proposed in this paper has high accuracy, and the positioning error is within 4 cm.

摘要

作为无线电力传输（WPT）系统的一项辅助功能，线圈定位可解决磁耦合器未对准导致的电力传输过程中的功率和效率下降问题。本文采用霍尔传感器阵列来测量磁通密度的变化。通过将多传感器数据融合结果与从线圈对准获取的预设数据进行比较，可实现接收线圈的实时精确定位。首先，建立接收线圈的定位模型，并分析磁通密度随线圈未对准的变化情况。其次，提出平面8向对称传感器阵列的布置方式以及基于磁通密度变化数据融合的定位算法。为避免自动导引车（AGV）对准过程中互感变化实际影响导致的磁场分布不稳定引起的线圈定位未对准，提出了初级和次级侧的恒流策略。最后，搭建了线圈定位实验平台。实验结果表明，本文提出的线圈定位方法具有较高精度，定位误差在4厘米以内。

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本文引用的文献

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Wireless implantable and biodegradable sensors for postsurgery monitoring: current status and future perspectives.用于术后监测的无线植入式和可生物降解传感器：现状和未来展望。
Nanotechnology. 2020 Apr 3;31(25):252001. doi: 10.1088/1361-6528/ab7a2d. Epub 2020 Feb 26.
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近场感应耦合链路为植入式医疗设备的三维毫米尺寸天线供电。
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