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Conference papers
Development and evaluation of f-k migration methods for fast ultrasonic imaging in solids
Abstract : In this paper, we present two frequency-domain algorithms for 2D imaging in solids, namely Stolt's method and Lu's method, the latter being extended to the 3D imaging with matrix arrays. First, the performances of both frequency-domain methods are evaluated in 2D imaging and compared with the time-domain plane wave imaging (PWI). Then, Lu's method and PWI are applied to 3D to image a distribution of small porosities in a steel block. 2D and 3D images calculated with the f-k methods are comparable to the PWI images in terms of contrast and spatial resolution while achieving computation times more than 25 times shorter.
Keywords :
Elastic waves
Frequency domain analysis
Imaging systems
Nondestructive examination
Ultrasonic imaging
Ultrasonic testing
Frequency domain algorithm
Frequency-domain methods
Non destructive testing
Plane wave
Spatial resolution
Transducer array
Time domain analysis
Computation time
3D f-k migration methods
Wave propagation
https://hal-cea.archives-ouvertes.fr/cea-01811902
Contributor : Léna Le Roy Connect in order to contact the contributor
Submitted on : Monday, June 11, 2018 - 8:04:11 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 - 8:04:11 AM
Last modification on : Thursday, February 17, 2022 - 10:08:04 AM