Depth Evaluation of Slits on Galvanized Steel Plate Using A Low Frequency Eddy Current Probe

N. A., Nadzri and M. M., Saari and M. A. H. P., Zaini and A. M., Halil and A. J. S., Hanifah and M., Ishak (2020) Depth Evaluation of Slits on Galvanized Steel Plate Using A Low Frequency Eddy Current Probe. In: InECCE2019: Proceedings of the 5th International Conference on Electrical, Control & Computer Engineering, 29 July 2019 , Kuantan, Pahang, Malaysia. pp. 59-66., 632. ISBN 978-981-15-2317-5

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This study performs an analysis of a small eddy current probe config-uration based on differential anisotropic magnetoresistance (AMR) sensors for characterization of small surface defects in galvanized steel plates. Owing to the advantage of the AMR sensor, the system of eddy current testing (ECT) with the AMR sensor has a huge benefit to detect sub-millimeter defects in steel struc-tures. In this study, an ECT probe is developed by using AMR sensors to perform crack detection in 2-mm galvanized steel plates with regards to the depth of arti-ficial slits where the ECT probe is scanned above the slits’ area. The signal that is detected by a lock-in amplifier is investigated with different frequencies of an excitation field. The line-scanned of signal intensity shows a clear intensity change at the crack area. This signal depends on the depth and frequencies. Fi-nally, a correlation between depth and detected signals is clarified with respect to different frequencies.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Non-destructive testing; NDT; Magnetic flux leakage; MFL; Anisotropic magnetoresistance; AMR
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division: Faculty of Electrical & Electronic Engineering
Institute of Postgraduate Studies
Faculty of Mechanical and Automotive Engineering Technology
Depositing User: Dr. Mohd Mawardi Saari
Date Deposited: 02 Jul 2020 08:17
Last Modified: 17 Nov 2022 07:36
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