Nonlinear ultrasonic spectroscopy using ESAM and DORT symbiosis

0352004 - ÚT 2011 RIV FR eng C - Conference Paper (international conference)
Vejvodová, Šárka - Převorovský, Zdeněk - Dos Santos, S.
Nonlinear ultrasonic spectroscopy using ESAM and DORT symbiosis.
CFA 10. Lyon: IntellAgence Technologies, 2010, s. 1-4. ISBN 978-2-9521105-7-0.
[10éme Congrés Francais d´Acoustique. Lyon (FR), 12.04.2010-16.04.2010]
R&D Projects: GA ČR GA106/07/1393; GA ČR GA101/07/1518
Institutional research plan: CEZ:AV0Z20760514
Keywords : time-reversal * ESAM * DORT
Subject RIV: BI - Acoustics
http://cfa.sfa.asso.fr/

Combination of DORT and ESAM is presented as a powerful tool for detection and localization of defects by analysis of their nonlinear signature. The third order nonlinear responses are extracted from ESAM eigen-excitations and constitute the multistatic data matrix associated with the singular value decomposition. The procedure is completed by visualization of nonlinear signatures of detected defects which is referred to as pseudotomographic imaging. This ESAM-DORT approach improves the performance of the local TR-NEWS methods, which can be applied to the tomography of structural defects.
Permanent Link: http://hdl.handle.net/11104/0191617