Titre :

Autocalibration method for guided wave tomography with undersampled data

Auteur(s) :

Druet, Tom [Auteur]
Laboratoire Méthodes CND (CEA, LIST) [LMC (CEA, LIST)]
Tastet, Jean-Loup [Auteur]
Laboratoire Méthodes CND (CEA, LIST) [LMC (CEA, LIST)]
Chapuis, Bastien [Auteur]
Laboratoire Méthodes CND (CEA, LIST) [LMC (CEA, LIST)]
Moulin, Emmanuel [Auteur]
INSA Institut National des Sciences Appliquées Hauts-de-France [INSA Hauts-De-France]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Titre de la revue :

Wave Motion

Pagination :

265-283

Éditeur :

Elsevier

Date de publication :

2019-06

ISSN :

0165-2125

Mot(s)-clé(s) en anglais :

Structural health monitoring
Guided waves
Ultrasound tomography
Piezoelectric transducers
Baseline-free

Discipline(s) HAL :

Sciences de l'ingénieur [physics]
Informatique [cs]
Physique [physics]

Résumé en anglais : [en]

This paper presents a baseline-free quantitative method for the imaging of corrosion flaws present in thin plates with under-sampled data. This method is based on the Hybrid Algorithm for Robust Breast Ultrasound Tomography ...
Lire la suite >This paper presents a baseline-free quantitative method for the imaging of corrosion flaws present in thin plates with under-sampled data. This method is based on the Hybrid Algorithm for Robust Breast Ultrasound Tomography (HARBUT) which is itself inherently baseline-free. However, in order to ensure that the incident field component becomes negligible in the reconstruction, a calibration step is necessary. Indeed, it is essential to rescale the data with respect to the acoustic model whether it be simulation data or experimental data. This calibration is usually performed by manually choosing a ray for which the domain of propagation is assumed sound. This can be problematic because this method is not automatic. Moreover, if the chosen ray happens to pass through a flaw, the resulting image will be of poor quality. This paper proposes an autocalibration method for the rescaling step. The field of application is Structural Health Monitoring (SHM) of critical structures with heavy constraints on both sensor intrusiveness and diagnostic reliability. In order to limit intrusiveness, a sub-sampled array of embedded guided waves sensors within the structure is used. Extensions to HARBUT are introduced to compensate for the aliasing caused by the undersampling. The benefits of these extensions are then assessed with numerical simulations and experimental datasets measured by a PZT network.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Commentaire :

IF = 1.563

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL