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Statements

Subject Item
n2:RIV%2F61388998%3A_____%2F09%3A00334340%21RIV10-AV0-61388998
rdf:type
n14:Vysledek skos:Concept
dcterms:description
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 and imaging 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. 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 and imaging 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.
dcterms:title
Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects
skos:prefLabel
Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects
skos:notation
RIV/61388998:_____/09:00334340!RIV10-AV0-61388998
n3:aktivita
n15:Z n15:P
n3:aktivity
P(FR-TI1/274), P(GA106/07/1393), Z(AV0Z20760514)
n3:cisloPeriodika
3
n3:dodaniDat
n7:2010
n3:domaciTvurceVysledku
n10:1845349 n10:8402469
n3:druhVysledku
n16:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n9:predkladatel
n3:idSjednocenehoVysledku
329725
n3:idVysledku
RIV/61388998:_____/09:00334340
n3:jazykVysledku
n18:eng
n3:klicovaSlova
time reversal tomography; ultrasonic imaging of defects; nonlinear elastic wave spectroscopy; nonlinear wave modulation
n3:klicoveSlovo
n6:nonlinear%20elastic%20wave%20spectroscopy n6:ultrasonic%20imaging%20of%20defects n6:nonlinear%20wave%20modulation n6:time%20reversal%20tomography
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[F69E38744D26]
n3:nazevZdroje
NDT Welding Bulletin
n3:obor
n11:BI
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:projekt
n5:FR-TI1%2F274 n5:GA106%2F07%2F1393
n3:rokUplatneniVysledku
n7:2009
n3:svazekPeriodika
19
n3:tvurceVysledku
Dos Santos, S. Převorovský, Zdeněk Vejvodová, Šárka
n3:zamer
n17:AV0Z20760514
s:issn
1213-3825
s:numberOfPages
5