Development of methods for the analysis of multi-mode TFM images

Kombossé Sy 1, 2, 3 Philippe Brédif 1 Ekaterina Iakovleva 1 Olivier Roy 2 Dominique Lesselier 3
1 DISC - Département Imagerie et Simulation pour le Contrôle
2 M2M-NDT
3 L2S - Laboratoire des signaux et systèmes
Abstract : TFM (Total Focusing Method) is an advanced post-processing imaging algorithm of ultrasonic array data that shows good potential in defect detection and characterization. It can be employed using an infinite number of paths between transducer and focusing point. Depending upon the geometry and the characteristics of the defect in a given part, there are not the same modes that are appropriate for the defect reconstruction. Furthermore, non-physical indications can be observed, prone to misinterpretation. These imaging artifacts are due to the coexistence of several contributions involving several modes of propagation and interactions with possible defects and/or the geometry of the part. Two methods for filtering artifacts and reducing the number of TFM images are developed and illustrated.
Keywords : ultrasonics non-destructive testing Total Focusing Method multi-mode
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Journal articles
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https://hal-centralesupelec.archives-ouvertes.fr/hal-01798849
Contributor : Dominique Lesselier <>
Submitted on : Thursday, May 24, 2018 - 9:42:19 AM
Last modification on : Thursday, February 7, 2019 - 5:20:20 PM

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Kombossé Sy, Philippe Brédif, Ekaterina Iakovleva, Olivier Roy, Dominique Lesselier. Development of methods for the analysis of multi-mode TFM images. Journal of Physics: Conference Series, IOP Publishing, 2018, 1017, pp.012005. ⟨10.1088/1742-6596/1017/1/012005⟩. ⟨hal-01798849⟩

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