Abstract
The magnetic flux leakage (MFL) technique is widely employed for nondestructive testing of ferromagnetic specimens and materials, including wire ropes, bridge cables, and pipelines. As regards the MFL testing, extracting features from MFL signals is crucial for defect recognition and estimation of corresponding widths. Deep learning has been extensively used for feature extraction, but it often performs inadequately on a small sample dataset. To address this limitation, this paper develops a network framework that combines the Wavelet Scattering Transform (WST) and Neural Networks (NN) for defect width estimation. The WST is a knowledge-based feature extraction technique with a structure similar to convolutional neural networks. It offers a translation-invariant representation of signal features using a redundant dictionary of wavelets. The NN then maps the WST feature representation to the defect width information. Experiments on real steel plates with defects are carried out to validate the effectiveness of the proposed framework. Quantitative comparisons of the experimental results demonstrate that the proposed framework achieves better estimation performance in handling MFL signals and has superiority in scenarios with limited training samples.
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The data in the research are obtained and analyzed based on experimental measurements.
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Acknowledgements
This work is partially supported by National Key R &D Program of China (2021YFE0204200), the Guangdong Basic and Applied Basic Research Foundation under Grant No.2019A1515111119 and No.2021A1515010926, and Shenzhen Science and Technology Program under Grant No.JSGG20210802154539015.
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ZF: Methodology, Analysis and interpretation of data, Software, Writing-Review & Editing. MZ: Conceptualization, Data curation, Validation, Writing-Review & Editing. HQ: Supervision, Writing-Review & Editing. ND: Project administration, Supervision. NL: Validation, Writing-Review & Editing.
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Fang, Z., Zhao, M., Qian, H. et al. Defect Width Estimation of Magnetic Flux Leakage Signal with Wavelet Scattering Transform. J Nondestruct Eval 43, 46 (2024). https://doi.org/10.1007/s10921-024-01061-0
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DOI: https://doi.org/10.1007/s10921-024-01061-0