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Ultrasonic imaging in highly attenuating materials with Walsh-Hadamard codes and the decomposition of the time reversal operator

E.L. Villaverde 1 S. Robert 1 C. Prada 2
1 DISC - Département Imagerie et Simulation pour le Contrôle
2 ESPCI Paris - Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris
Abstract : In this work, the total focusing method is used to image defects in a high density polyethylene pipe. The viscoelastic attenuation of this material corrupts the images with a high electronic noise. To improve the image quality, the decomposition of the time reversal operator method is combined with spatial Walsh-Hadamard coded transmissions before calculating the images.
Keywords : Time reversal Walsh-Hadamard code Ultrasonic testing Non destructive testing High density polyethylene pipes Electronic noise Defect characterization Decomposition of the time reversal operator Coded transmission Ultrasonic imaging Nondestructive examination Imaging systems Defects Characterization Block codes
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https://hal-cea.archives-ouvertes.fr/cea-01811903
Contributor : Léna Le Roy <>
Submitted on : Monday, June 11, 2018 - 8:04:13 AM
Last modification on : Saturday, May 1, 2021 - 3:46:21 AM

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E.L. Villaverde, S. Robert, C. Prada. Ultrasonic imaging in highly attenuating materials with Walsh-Hadamard codes and the decomposition of the time reversal operator. IEEE International Ultrasonics Symposium, IUS, 2016, Tours, France. ⟨10.1109/ULTSYM.2016.7728744⟩. ⟨cea-01811903⟩

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