Acoustic wave focusing in complex media using Nonlinear Time Reversal coded signal processing

0438674 - ÚT 2015 RIV CZ eng A - Abstrakt
Dos Santos, S. - Dvořáková, Zuzana - Lints, M. - Kůs, V. - Salupere, A. - Převorovský, Zdeněk
Acoustic wave focusing in complex media using Nonlinear Time Reversal coded signal processing.
11th European Conference on Non-Destructive Testing (ECNDT 2014). Brno: University of Technology, 2014. s. 144-145. ISBN 978-80-214-5019-6.
[European Conference on Non-Destructive Testing (ECNDT 2014) /11./. 06.10.2014-10.10.2014, Praha]
Institucionální podpora: RVO:61388998
Klíčová slova: ultrasonic testing (UT) * signal processing * TR-NEWS * Nonlinear Time Reversal * NDT * nonlinear acoustics
Kód oboru RIV: BI - Akustika a kmity

Recent ten years have seen considerable development (both in numerical and experimental aspects) of optimized signal processing methods for improving Non Destructive Testing (NDT) methods derived from Nonlinear Elastic Wave Spectroscopy (NEWS). The classical NEWS methods are supplemented and improved by new excitations having the intrinsic property of enlarging frequency analysis bandwidth and time domain scales. This is the case of TR-NEWS, recognized as a useful tool for microcracks detection of various complex samples, but also for nonlinear scatterers localization. Associate TR-NEWS experiments have been validated by the large number of simulation results supporting procedure reliability. In this contribution, we concentrated on signal processing and statistical analysis of a NEWS based microdamage imaging technique, which is believed to be a good candidate for sensitive imaging of nonlinear scattering zones.
Trvalý link: http://hdl.handle.net/11104/0242484