Eddy Current Transducer with Rotating Permanent Magnets to Test Planar Conducting Plates
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In this paper, we present an eddy current transducer with rotating permanent magnets for the inspection of planar conducting plates. The transducer consists of a rotating head with permanent magnets, which is used to generate variable magnetic fields and thus induce eddy currents in the tested material. Two Hall sensors connected in a differential manner are used to detect a nonuniform distribution of eddy currents induced in a specimen containing a defect. To prove the usability of the transducer, a number of experiments were conducted on thick aluminum samples containing notches at different depths. Selected results of the achieved measurements are presented.
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2021 ◽
Vol 720
(1)
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pp. 012134
2013 ◽
Vol 467
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pp. 528-530
2020 ◽
Vol 1515
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pp. 042073
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2007 ◽
Vol 25
(1-4)
◽
pp. 369-373