Nelineární ultrazvuková pseudo-tomografie s časově reversními zrcadly

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F08%3A00317520" target="_blank" >RIV/61388998:_____/08:00317520 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Nonlinear Time Reversal Ultrasonic Pseudo-Tomography

Popis výsledku v původním jazyce

Nonlinear Elastic Wave Spectroscopy (NEWS) becomes new effective method for non-destructive testing of complex structures providing high sensitivity of damage detection. One of the most promising NEWS procedures is Nonlinear Time Reversal Acoustics (NLTRA) realizable in a lot of different ways. Common NLTRA procedure is mostly global, which means that localization of defect by this procedure can be often difficult. A modification of NLTRA is proposed in this paper, based on similar arrangement as ultrasonic tomography. Computer controlled switching between transmitting and receiving transducers is realized by specially designed high-voltage relay multiplexer. The matrix of reconstructed and back-received signals and their spectra is then analyzed, andnonlinear features like higher harmonics etc. are examined on all wave-paths. Cross-section of different wave-paths with the highest nonlinear features allocates a sector of probable defect occurrence.

Název v anglickém jazyce

Nonlinear Time Reversal Ultrasonic Pseudo-Tomography

Popis výsledku anglicky

Nonlinear Elastic Wave Spectroscopy (NEWS) becomes new effective method for non-destructive testing of complex structures providing high sensitivity of damage detection. One of the most promising NEWS procedures is Nonlinear Time Reversal Acoustics (NLTRA) realizable in a lot of different ways. Common NLTRA procedure is mostly global, which means that localization of defect by this procedure can be often difficult. A modification of NLTRA is proposed in this paper, based on similar arrangement as ultrasonic tomography. Computer controlled switching between transmitting and receiving transducers is realized by specially designed high-voltage relay multiplexer. The matrix of reconstructed and back-received signals and their spectra is then analyzed, andnonlinear features like higher harmonics etc. are examined on all wave-paths. Cross-section of different wave-paths with the highest nonlinear features allocates a sector of probable defect occurrence.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název periodika

1st International Symposium on Laser Ultrasonics: Science, technology and Applications

ISSN

1435-4934

e-ISSN

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Svazek periodika

13

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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