Chapitre D'ouvrage Année : 2002

Characterization of a moving surface roughness by backscatterer ultrasound performed with time-frequency analysis and high order statistics

Résumé

The determination of a calibrated surface roughness with translation velocity of v=15 ms-1 was investigated with ultrasonic backscattered technique based on Doppler effect. The difficulty of the Fourier analysis to detect with accuracy the instantaneous changes of roughness induces a time-frequency analysis. The need to analyze both frequency and temporal nature of data is due to the non stationarity of measured signals. The theoretical study demonstrates that the Doppler spectrum is the product of the spatial spectrum of the surface roughness and the velocity of the surface. An accurate detection of roughness has been derived thanks to the spectrogram representation.

Fichier principal
Vignette du fichier
2001 - DosSantos - Characterization of a moving surface roughness by backscatter ultrasound.pdf (1.36 Mo) Télécharger le fichier
abs_quebec_01 - p16.pdf (17.58 Ko) Télécharger le fichier
abs_quebec_01.pdf (164.22 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-04996400 , version 1 (19-03-2025)

Licence

Identifiants

  • HAL Id : hal-04996400 , version 1

Citer

Serge Dos Santos, Pierre Marechal, Jean Marc Girault, François Vander Meulen. Characterization of a moving surface roughness by backscatterer ultrasound performed with time-frequency analysis and high order statistics. IV International Workshop - Advances in Signal Processing for Nondestructive : Evaluation of Materials, 6, American Society for Nondestructive Testing, pp.149-154, 2002, 1-57117-091-X. ⟨hal-04996400⟩

Collections

207 Consultations
96 Téléchargements

Partager

  • More