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Conference papers
High-frequency Total Focusing Method (TFM) imaging in strongly attenuating materials with the decomposition of the time reversal operator associated with orthogonal coded excitations
Abstract : In the present work, the Total Focusing Method (TFM) is used to image defects in a High Density Polyethylene (HDPE) pipe. The viscoelastic attenuation of this material corrupts the images with a high electronic noise. In order to improve the image quality, the Decomposition of the Time Reversal Operator (DORT) filtering is combined with spatial Walsh-Hadamard coded transmissions before calculating the images. Experiments on a complex HDPE joint demonstrate that this method improves the signal-to-noise ratio by more than 40 dB in comparison with the conventional TFM.
https://hal-cea.archives-ouvertes.fr/cea-01811888
Contributor : Léna Le Roy Connect in order to contact the contributor
Submitted on : Monday, June 11, 2018 - 8:03:17 AM
Last modification on : Thursday, February 17, 2022 - 10:08:04 AM
Contributor : Léna Le Roy Connect in order to contact the contributor
Submitted on : Monday, June 11, 2018 - 8:03:17 AM
Last modification on : Thursday, February 17, 2022 - 10:08:04 AM
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