Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects

Popis výsledku v původním jazyce

Classical ultrasonic tomography generally uses source signals of constant amplitude. Linear characteristics like amplitude attenuation or time of flight of elastic waves traversing a body in different directions are evaluated and used to localization andimaging of relatively large structural defects. The main advantage of nonlinear methods is their high sensitivity and ability to disclose defects smaller than ultrasound wavelength. Some limitations are connected with difficulties of defects location. To overcome these constraints, further modifications of NEWS, referred as nonlinear tomography procedures, are discussed in this paper. Two NEWS techniques are considered: Nonlinear wave modulation (NWMS) and nonlinear time reversal (NLTR), both using transducer arrays, allowing localization of damaged zones. Extracted nonlinear parameters are dependent on the wave paths along damaged zones, which allows zonal imaging of defects.

Název v anglickém jazyce

Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects

Popis výsledku anglicky

Classical ultrasonic tomography generally uses source signals of constant amplitude. Linear characteristics like amplitude attenuation or time of flight of elastic waves traversing a body in different directions are evaluated and used to localization andimaging of relatively large structural defects. The main advantage of nonlinear methods is their high sensitivity and ability to disclose defects smaller than ultrasound wavelength. Some limitations are connected with difficulties of defects location. To overcome these constraints, further modifications of NEWS, referred as nonlinear tomography procedures, are discussed in this paper. Two NEWS techniques are considered: Nonlinear wave modulation (NWMS) and nonlinear time reversal (NLTR), both using transducer arrays, allowing localization of damaged zones. Extracted nonlinear parameters are dependent on the wave paths along damaged zones, which allows zonal imaging of defects.

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

2009

Kód důvěrnosti údajů

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

Název periodika

NDT Welding Bulletin

ISSN

1213-3825

e-ISSN

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Svazek periodika

19

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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