Eddy current (EC) inspection is used extensively in non-destructive testing (NDT) to detect surface-breaking defects of engineering components. However, the sensitivity of conventional eddy current inspection has plateaued in recent years. The ability to detect submillimetre defects before it becomes critical would allow engineering components to remain in-service safely for longer. Typically, it is required that higher frequency EC is employed to achieve a suitable sensitivity for detection of such submillimetre defects. However, that would lead to significant electromagnetic noise affecting the sensitivity of the inspection. To overcome this issue, the electrical-resonance based eddy current method has been proposed, where the electrical enhanced resonance signal increases the contrast between signal and noise, thus improving the sensitivity of the defect detection. This work aims to investigate the electrical-resonance system via simulation technology using combination of fast numerical-based simulation and circuit approach. Leveraging on this model, the detection system can be optimized by performing parameters tuning. Investigation of both experiment and simulation develops a precise calibration model for submillimeter defects detection.
Y. S. Hor et al., "Modelling and Evaluation of Electrical Resonance Eddy Current for Submillimeter Defect Detection," Progress In Electromagnetics Research C, vol. 89, pp. 101-110, Electromagnetics Academy, Jan 2019.
The definitive version is available at https://doi.org/10.2528/PIERC18102902
Keywords and Phrases
Defects; Inspection; Resonance, Eddy current method; Eddy-current inspection; Electrical resonances; Electromagnetic noise; Engineering components; Non destructive testing; Simulation technologies; Surface breaking defects, Eddy current testing
International Standard Serial Number (ISSN)
Article - Journal
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01 Jan 2019