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Sensors 2016, 16(12), 2168; doi:10.3390/s16122168

A Modified Magnetic Gradient Contraction Based Method for Ferromagnetic Target Localization

1
Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China
2
University of Chinese Academy of Sciences, Beijing 100039, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Jason K. Levy
Received: 15 October 2016 / Revised: 12 December 2016 / Accepted: 13 December 2016 / Published: 17 December 2016
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Abstract

The Scalar Triangulation and Ranging (STAR) method, which is based upon the unique properties of magnetic gradient contraction, is a high real-time ferromagnetic target localization method. Only one measurement point is required in the STAR method and it is not sensitive to changes in sensing platform orientation. However, the localization accuracy of the method is limited by the asphericity errors and the inaccurate value of position leads to larger errors in the estimation of magnetic moment. To improve the localization accuracy, a modified STAR method is proposed. In the proposed method, the asphericity errors of the traditional STAR method are compensated with an iterative algorithm. The proposed method has a fast convergence rate which meets the requirement of high real-time localization. Simulations and field experiments have been done to evaluate the performance of the proposed method. The results indicate that target parameters estimated by the modified STAR method are more accurate than the traditional STAR method. View Full-Text
Keywords: ferromagnetic target localization; magnetic gradient tensor; magnetic dipole; iterative algorithm ferromagnetic target localization; magnetic gradient tensor; magnetic dipole; iterative algorithm
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wang, C.; Zhang, X.; Qu, X.; Pan, X.; Fang, G.; Chen, L. A Modified Magnetic Gradient Contraction Based Method for Ferromagnetic Target Localization. Sensors 2016, 16, 2168.

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