Non-linear time reversal ultrasonic pseudo-tomography

Kód výsledku v IS VaVaI

RIV/61388998:_____/11:00363969 - isvavai.cz

Výsledek na webu

http://www.inderscience.com/offer.php?id=43216

DOI - Digital Object Identifier

10.1504/IJMMP.2011.043216

Jazyk výsledku

angličtina

Název v původním jazyce

Non-linear time reversal ultrasonic pseudo-tomography

Popis výsledku v původním jazyce

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-receivedsignals 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.

Název v anglickém jazyce

Non-linear time reversal ultrasonic pseudo-tomography

Popis výsledku anglicky

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-receivedsignals 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

FR-TI1/274: *Zhodnocení SHM metod a jejich integrace do údržbového systému letadla

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Microstructure and Materials Properties

ISSN

1741-8410

e-ISSN

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Svazek periodika

6

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

7

Strana od-do

206-213

Kód UT WoS článku

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EID výsledku v databázi Scopus

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