Magnetic property evaluation using leakage flux spectrogram

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Nagata, Shoichiro^{a; *} | Enokizono, Masato^b | Chady, Tomasz^c | Sikora, Ryszard^c

Affiliations: [a] University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan | [b] Oita University, 700 Dannoharu, Oita 870-1192, Japan | [c] Technical University of Szczecin, ul. Sikorskiego 37, 70-310 Szczecin, Poland

Correspondence: [*] Corresponding author. Tel.: +81 0 985 58 7355; Fax: +81 0 985 58 7327; E-mail: [email protected]

Abstract: The validity of a new eddy-current-based damage detection technique was investigated. The Multi-Frequency Excitation and Spectrogram method (MFES) using Hall element sensor array was employed. Hall sensors positioned between the excitation yoke legs picked up leakage flux density in proportion to the excitation frequency. This new sensor configuration may be effective in the evaluation of magnetic properties such as permeability or conductivity. In order to unveil the phenomenon, finite element analyses are performed.

Keywords: Multi-Frequency Excitation and Spectrogram Method (MFES), skin depth, Finite Element Method (FEM)

DOI: 10.3233/JAE-2007-753

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 503-509, 2007