期刊
IEEE TRANSACTIONS ON MAGNETICS
卷 54, 期 11, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2018.2844290
关键词
Anisotropic magnetoresistance (AMR); inverse problems; magnetic fields; sensor arrays
资金
- Ministry of Science and Technology of Taiwan [MOST 106-2221-E-992-342]
The advanced method of mapping magnetic field and retrieving 2-D current distribution is investigated in this paper. A 16-channel anisotropic magnetoresistance sensor array scanner was implemented to quickly map the magnetic field. The algorithm used for calculating the current density distribution is the 2-D Fourier transform with properly chosen spatial filters. The spatial resolution for resolving the current distribution is 2 mm with a 2.5 mm gap. The proposed system is promising for applications in non-destructive testing, such as foreign object detection, field interference mapping for mobile device, and open and short circuits in printed circuit board.
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