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Nonlinear elastic wave spectroscopy in symbiosis with time reversal for localization of defects: TR-NEWS
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SYSNO ASEP 0334545 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Nonlinear elastic wave spectroscopy in symbiosis with time reversal for localization of defects: TR-NEWS Title Nelineární spektroskopie elastických vln v symbióze s časovou reverzací signálu pro lokalizaci defektů - TR NEWS Author(s) Dos Santos, S. (FR)
Vejvodová, Šárka (UT-L)
Převorovský, Zdeněk (UT-L) RIDSource Title NDT Welding Bulletin. - : Pavel Turek-Agentura Tiret - ISSN 1213-3825
Roč. 19, č. 2 (2009), s. 14-14Number of pages 1 s. Action NDT in PROGRESS Event date 12.11.2009-14.11.2009 VEvent location Praha Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords nonlinear elastic wave spectroscopy (NEWS) ; ESAM ; time reversal (TR) ; TR-NEWS imaging ; tomography ; DORT Subject RIV BI - Acoustics R&D Projects GA106/07/1393 GA ČR - Czech Science Foundation (CSF) FR-TI1/274 GA MPO - Ministry of Industry and Trade (MPO) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation Using the symmetry invariance and reciprocity the classical NEWS methods are supplemented and improved by practically elaborated TR-NEWS procedure having the intrinsic property of enlarging frequency analysis bandwidth. Coded excitations have been generalized using Symmetry Analysis ESAM (Excitation Symmetry Analysis Method), including also the chirp-coded excitation, which improves the signal to noise ratio and enables harmonic imaging of complex specimen. In this paper, we propose a new NDT application of the above approaches implemented on a composite specimen with adhesive joints. The calibrated chirp-coded TR-NEWS imaging of the sample is obtained by using the symmetrical excitations, and pre- and post- signal processing. Localization of the scatterer is illustrated on 2D plot. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2010
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