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Non-linear time reversal ultrasonic pseudo-tomography
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SYSNO ASEP 0363969 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Non-linear time reversal ultrasonic pseudo-tomography Tvůrce(i) Převorovský, Zdeněk (UT-L) RID
Vejvodová, Šárka (UT-L)
Krofta, Josef (UT-L) RID
Převorovský, David (UT-L)Celkový počet autorů 4 Zdroj.dok. International Journal of Microstructure and Materials Properties - ISSN 1741-8410
Roč. 6, 3/4 (2011), s. 206-213Poč.str. 7 s. Akce NDT in Progress Datum konání 05.11.2007-07.11.2007 Místo konání Praha Země CZ - Česká republika Typ akce EUR Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova NDT ; nonlinear elastic wave spectroscopy ; time reversal mirrors ; ultrasonic pseudo-tomography Vědní obor RIV BI - Akustika a kmity CEP FR-TI1/274 GA MPO - Ministerstvo průmyslu a obchodu CEZ AV0Z20760514 - UT-L (2005-2011) DOI 10.1504/IJMMP.2011.043216 Anotace Nonlinear Elastic Wave Spectroscopy (NEWS) became an effective methodology for NDT of complex structures, providing high sensitivity of damage detection. One of the most promising NEWS procedures is based on Nonlinear Time Reversal Mirrors (NLTRM). General NLTRM procedure is mostly global, which brings difficulties with defect localization. In this paper, a procedure modification is proposed, based on similar arrangement as ultrasonic tomography. Array of transducers is spaced on a structure with defect. Individual piezoelectric transducers subsequently transmit direct signals, which are detected by receivers, then time-reversed and sent back. High-voltage relay multiplexer is used to switch between transmitters and receivers. Matrices of back-received signals and their spectra are analyzed, and their nonlinear features are extracted along all wave-paths. Procedure application is illustrated by NDT of aircraft parts where NLTRM pseudo-tomography is used to allocate defective zones. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2012 Elektronická adresa http://www.inderscience.com/offer.php?id=43216
Počet záznamů: 1