Title :

Quantification and mitigation of the effect of resynchronization errors in ultrasound sensor network for passive imaging in elastic plates

Author(s) :

Bouchakour, Omar [Auteur]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Moulin, Emmanuel [Auteur]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Chehami, Lynda [Auteur]
Université Polytechnique Hauts-de-France [UPHF]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Smagin, Nikolay [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Journal title :

Journal of the Acoustical Society of America

Pages :

3283 - 3290

Publisher :

Acoustical Society of America

Publication date :

2024

ISSN :

0001-4966

English keyword(s) :

Ultrasound
Flexural waves
Elastic modulus
Poisson's ratio
Sensors
Geographic information systems
Computer simulation
Probability theory
Optical metrology
Scattering theory

HAL domain(s) :

Sciences de l'ingénieur [physics]/Acoustique [physics.class-ph]
Physique [physics]/Physique mathématique [math-ph]
Sciences de l'ingénieur [physics]/Traitement du signal et de l'image [eess.SP]

English abstract : [en]

The problem of signal desynchronization in passive imaging based on noise correlation for defect detection in elastic plates is investigated. Although a post-processing resynchronization process relying on the symmetry of ...
Show more >The problem of signal desynchronization in passive imaging based on noise correlation for defect detection in elastic plates is investigated. Although a post-processing resynchronization process relying on the symmetry of noise correlation functions can be applied prior to the imaging algorithm, perfect synchronization might not be achieved experimentally. Effect of such residual synchronization errors on the defect detection performance is quantified as a function of their probability density function. A mathematical regularization process is then proposed to reduce the standard deviation of the resynchronization errors by a factor of √( N-1)/N (N is the number of sensors), which results in a significant improvement in the detection performance. Finally, these theoretical results are validated through a simple flexural-wave propagation simulationShow less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

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

Source :

Harvested from HAL