A model-based approach for estimation of the crack depth on a massive metal structure

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Abstract

This paper deals with the eddy current technique for nondestructive evaluation of the crack depth on a massive specimen used in aeronautical industry. A set of C-scan eddy current images is analyzed to reduce the noise and to select suitable features, which can be used to estimate the crack depth. Based on this study, a method relying on polynomial forward models of the relationship between crack depth and the maximum value of the sensor impedance is proposed. The least square and the non-negative least square techniques are applied to analyze the usability of proposed models. The error of obtained estimations is smaller than 10%, for almost used experimental data.

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Cung, L. T., Dao, T. D., Nguyen, P. C., & Bui, T. D. (2018). A model-based approach for estimation of the crack depth on a massive metal structure. Measurement and Control (United Kingdom), 51(5–6), 182–191. https://doi.org/10.1177/0020294018778314

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