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Statements

Subject Item
n2:RIV%2F68407700%3A21230%2F05%3A03110370%21RIV07-GA0-21230___
rdf:type
skos:Concept n18:Vysledek
dcterms:description
In ultrasonic defectoscopy it is very difficult to detect flaw in materials with coarse-grain structure. The ultrasonic signals measured on these materials contain echoes which are very similar to fault echo. These echoes arise from grains which are contained in material. For detection of flaw various methods for suppressing of echoes from grains have to be used. In this work we used the method for filtering of ultrasonic signal based on discrete wavelet transform. For classification of ultrasonic signals in A-scan we used pattern recognition method called support vector machines. In this study we classify signals with fault echo, echo from weld and back-wall echo. Ultrasonic signals were measured on material used for constructing airplane engines. The experimental results indicate the performance of the proposed approach. In ultrasonic defectoscopy it is very difficult to detect flaw in materials with coarse-grain structure. The ultrasonic signals measured on these materials contain echoes which are very similar to fault echo. These echoes arise from grains which are contained in material. For detection of flaw various methods for suppressing of echoes from grains have to be used. In this work we used the method for filtering of ultrasonic signal based on discrete wavelet transform. For classification of ultrasonic signals in A-scan we used pattern recognition method called support vector machines. In this study we classify signals with fault echo, echo from weld and back-wall echo. Ultrasonic signals were measured on material used for constructing airplane engines. The experimental results indicate the performance of the proposed approach. Práce popisuje metody pro klasifikaci ultrazvukových signálu. Pro klasifikaci jsou pou3ity toi typy mioených signálu: signál v místi s vadou, signál bez vady a signál v místi sváru. Signály jsou klasifikovány metodou support vector machines, které poedchází filtrace signálu pomocí vlnkových paketu.
dcterms:title
Classification of Ultrasonic Signals Klasifikace ultrazvukových signálu Classification of Ultrasonic Signals
skos:prefLabel
Classification of Ultrasonic Signals Classification of Ultrasonic Signals Klasifikace ultrazvukových signálu
skos:notation
RIV/68407700:21230/05:03110370!RIV07-GA0-21230___
n4:strany
27 ; 33
n4:aktivita
n8:P n8:Z
n4:aktivity
P(GD102/05/H032), Z(MSM6840770015)
n4:dodaniDat
n16:2007
n4:domaciTvurceVysledku
n6:3755851 n6:6641245 n6:5102170
n4:druhVysledku
n21:D
n4:duvernostUdaju
n12:S
n4:entitaPredkladatele
n10:predkladatel
n4:idSjednocenehoVysledku
515487
n4:idVysledku
RIV/68407700:21230/05:03110370
n4:jazykVysledku
n20:eng
n4:klicovaSlova
Discrete wavelet transform; Support vector machines; Ultrasonic testing
n4:klicoveSlovo
n7:Ultrasonic%20testing n7:Discrete%20wavelet%20transform n7:Support%20vector%20machines
n4:kontrolniKodProRIV
[C028FCBB938D]
n4:mistoKonaniAkce
Portoro3
n4:mistoVydani
Ljubljana
n4:nazevZdroje
Application of Contemporary Non-Destructive Testing in Engineering - Conference Proceedings
n4:obor
n17:JB
n4:pocetDomacichTvurcuVysledku
3
n4:pocetTvurcuVysledku
3
n4:projekt
n13:GD102%2F05%2FH032
n4:rokUplatneniVysledku
n16:2005
n4:tvurceVysledku
Kreidl, Marcel Šmíd, Radislav Matz, Václav
n4:typAkce
n5:WRD
n4:zahajeniAkce
2005-09-01+02:00
n4:zamer
n15:MSM6840770015
s:numberOfPages
7
n14:hasPublisher
The Slovenian Society for Non-Destructive Testing
n3:isbn
961-90610-5-5
n22:organizacniJednotka
21230