About: Classification of Ultrasonic Signals

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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. (cs) 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. (en)
Title	Classification of Ultrasonic Signals Classification of Ultrasonic Signals (en) Klasifikace ultrazvukových signálu (cs)
skos:prefLabel	Classification of Ultrasonic Signals Classification of Ultrasonic Signals (en) Klasifikace ultrazvukových signálu (cs)
skos:notation	RIV/68407700:21230/05:03110370!RIV07-GA0-21230___
http://linked.open.../vavai/riv/strany	27 ; 33
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GD102/05/H032), Z(MSM6840770015)
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	Šmíd, Radislav Kreidl, Marcel Matz, Václav
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta elektrotechnická
http://linked.open...dnocenehoVysledku	515487
http://linked.open...ai/riv/idVysledku	RIV/68407700:21230/05:03110370
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Discrete wavelet transform; Support vector machines; Ultrasonic testing (en)
http://linked.open.../riv/klicoveSlovo	Support vector machines Ultrasonic testing Discrete wavelet transform
http://linked.open...ontrolniKodProRIV	[C028FCBB938D]
http://linked.open...v/mistoKonaniAkce	Portoro3
http://linked.open...i/riv/mistoVydani	Ljubljana
http://linked.open...i/riv/nazevZdroje	Application of Contemporary Non-Destructive Testing in Engineering - Conference Proceedings
http://linked.open...in/vavai/riv/obor	JB
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Research, development and optimisation of measuring systems and measurement uncertainty estimation by their application
http://linked.open...UplatneniVysledku	2005
http://linked.open...iv/tvurceVysledku	Šmíd, Radislav Kreidl, Marcel Matz, Václav
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2005-09-01 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Research of Methods and Systems for Measurement of Physical Quantities and Measured Data Processing.
number of pages	7 (xsd:int)
http://purl.org/ne...btex#hasPublisher	The Slovenian Society for Non-Destructive Testing
https://schema.org/isbn	961-90610-5-5
http://localhost/t...ganizacniJednotka	21230
is http://linked.open...avai/riv/vysledek of	Classification of Ultrasonic Signals

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