HAL: hal-00563872, version 1

DOI: 10.1063/1.3544503

Detailed view

Export this paper BibTeX - EndNote - TEI - RefWorks -

Journal of Applied Physics 109, 3 (2011) 034903

Locating a weak change using diffuse waves: Theoretical approach and inversion procedure

Vincent Rossetto 1, Ludovic Margerin 2, Thomas Planès 3, Eric Larose 3

(2011-02-03)

We describe a time-resolved monitoring technique for heterogeneous media. Our approach is based on the spatial variations of the cross-coherence of diffuse waves acquired at fixed positions but at different dates. The technique applies to all kind of waves, provided that waveforms can be acquired with a sampling frequency much larger than the wave frequency. To locate and characterize a weak change that occurred between successive acquisitions, we use a maximum likelihood approach combined with a diffusive propagation model. We characterize this technique, locating a weak change using diffuse waves, called LOCADIFF, with the aid of numerical simulations. In several illustrative examples, we show that the change can be located with a precision of a few wavelengths and that its effective scattering cross-section can be retrieved. We investigate how the accuracy and precision of the method depends on the number of source-receiver pairs, on the time window used to compute the cross-correlation and on the errors in the propagation model. Applications can be found in nondestructive testing, seismology, radar, and sonar location.

1:	Laboratoire de physique et modélisation des milieux condensés (LPMMC)
	CNRS : UMR5493 – Université Joseph Fourier - Grenoble I
2:	Institut de recherche en astrophysique et planétologie (IRAP)
	CNRS : UMR5277 – Université Paul Sabatier [UPS] - Toulouse III – Observatoire Midi-Pyrénées
3:	Institut des sciences de la Terre (ISTerre)
	CNRS : UMR5275 – IFSTTAR – Université de Savoie – Université Joseph Fourier - Grenoble I – INSU – OSUG – Institut de recherche pour le développement [IRD] : UR219

Research team: Ondes et structures

Subject

:

Physics/Mechanics/Acoustics Engineering Sciences/Acoustics Physics/Mechanics/Materials and structures in mechanics Engineering Sciences/Mechanics/Materials and structures in mechanics Physics/Physics/General Physics

Keyword(s): acoustic wave propagation – maximum likelihood estimation – numerical analysis

hal-00563872, version 1

http://hal.archives-ouvertes.fr/hal-00563872

oai:hal.archives-ouvertes.fr:hal-00563872

From: Vincent Rossetto-Giaccherino <>

Submitted on: Monday, 7 February 2011 14:52:57

Updated on: Wednesday, 28 March 2012 11:54:59