Combining eddy-current and magnetic methods for the defectoscopy of ferromagnetic materials

Shkatov, P. N.

doi:10.1080/10589759.2012.716436

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Cited by 8 publications

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“…Many classic non-destructive approaches have been applied to detect the cracks, such as ultrasonic, [2] eddy current, [3,4] magnetic particle testing [5,6] and penetrate testing. [7] Ultrasonic is more suitable for large-size parts.…”

Section: Introductionmentioning

confidence: 99%

Inspection of magnetic tile internal cracks based on impact acoustics

Xie

Huang

Zhao

et al. 2015

Nondestructive Testing and Evaluation

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An automatic system is developed for internal cracks detection in magnetic tiles based on the impact acoustics, using wavelet packet transform (WPT), principal component analysis (PCA) and hidden Markov model (HMM). In this system, the detecting device is considered as core part to collect and analyse the impact sounds. The original impact sounds are first decomposed up to six levels based on WPT to extract the features. PCA is then performed for dimension reduction and clustering analysis. By adopting the features extracted based on WPT and optimised by PCA as inputs, an HHM classifier is developed for automatic inspection. The results of classification show that the accuracy rate is 100%, demonstrating that the system has significant potential in detecting magnetic tile internal cracks.

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Section: Introductionmentioning

confidence: 99%