Simulation of Transient Eddy-Current Measurement for the Characterization of Depth and Conductivity of a Conductive Plate

• Published in: IEEE transactions on magnetics Vol. 44; no. 11; pp. 3281 - 3284
• Main Authors: Weiying Cheng, Komura, I.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.11.2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Coils; Conductivity measurement; Cross-disciplinary physics: materials science; rheology; Eddy currents; eddy-current testing; Electric variables measurement; Electromagnetic transients; Exact sciences and technology; impulse response; Magnetic field measurement; Magnetism; Materials science; Other topics in materials science; Physics; Power measurement; Testing; Thickness measurement; Transient analysis; Thickness; Simulation; eddy-current testing; Conductivity measurement; impulse response; Eddy currents; Eddy current testing; Thickness measurement; Transients; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2008.2001613

A transient eddy-current measurement method is presented to determine the thickness and conductivity of a conductive plate. The conductive plate is induced by an air-cored coil, the magnetic flux density along the axial is measured, and the various signals corresponding to plates with different thickness and conductivity are calculated using a 3-D transient eddy-current simulator. Characteristic features are obtained from the transient response. A similarity-based modeling method is utilized in this paper to estimate the thickness and conductivity of the conductive plate.