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Updated: Jan 27, 2026

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
Published on: January 16, 2020
Eddy Current Transducer with Rotating Permanent Magnets to Test Planar Conducting Plates
Tomasz Chady1, Jacek M Grochowalski2
1Faculty of Electrical Engineering, West Pomeranian University of Technology, ul. Sikorskiego 37, Szczecin 70-313, Poland. tchady@zut.edu.pl.
Abstract:
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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