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2024 Simulation Study of Orthogonal Eddy Current Excitation Technique for Detection of Multi-O.pdf Restricted to Repository staff only Download (786kB) | Request a copy |
Abstract
Identifying crack propagation direction and depth is crucial for steel structure safety. This study explores an orthogonal eddy current excitation technique for detecting multi-orientation slits in mild steels. Using 3-D finite element (FE) simulation, the normal magnetic response Bz distribution induced by orthogonal eddy current excitation is calculated. Two perpendicular inductor arrays mimic orthogonal eddy currents. Artificial vertical, horizontal, 45°, and cross slits on a 12-mm mild steel plate are modeled, and the normal magnetic response contributed by these slits is simulated. Findings show that the orthogonal eddy current excitation technique causes a change in the magnetic field distribution for all types of slits, indicating its ability to resolve any orientation of the slits. Both x- and y-differential signals exhibit similar sensitivity in detecting vertical and horizontal slits. In contrast to the real component of the differential signal, the imaginary components showed a higher normalized differential value due to slits, suggesting a higher detection sensitivity of the differential imaginary components. The orthogonal eddy current induction technique would be a preferable choice to be implemented in an ECT probe.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | 3-D finite elements; Crack propagation depth; Crack propagation direction; Current excitation; Differential signal; Eddy-current; Excitation technique; Magnetic response; Simulation studies; Structure safety |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Faculty/Division: | Faculty of Electrical & Electronic Engineering Institute of Postgraduate Studies |
| Depositing User: | Dr. Mohd Mawardi Saari |
| Date Deposited: | 23 Apr 2025 02:12 |
| Last Modified: | 23 Apr 2025 02:12 |
| URI: | http://umpir.ump.edu.my/id/eprint/44383 |
| Download Statistic: | View Download Statistics |
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