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dc.contributor.authorŠikula, Josef
dc.contributor.authorHájek, Karel
dc.contributor.authorSedláková, Vlasta
dc.contributor.authorTofel, Pavel
dc.contributor.authorMajzner, Jiří
dc.contributor.editorPihera, Josef
dc.contributor.editorSteiner, František
dc.date.accessioned2012-10-08T12:30:06Z
dc.date.available2012-10-08T12:30:06Z
dc.date.issued2008
dc.identifier.citationElectroscope. 2008, Konference EDS 2008.cs
dc.identifier.citationEDS '08 IMAPS CS International Conference Proceedings. Brno, VUT v Brně, 2008.cs
dc.identifier.isbn978-80-214-3717-3
dc.identifier.issn1802-4564
dc.identifier.urihttp://147.228.94.30/images/PDF/Rocnik2008/EDS_2008/sedlakova.pdf
dc.identifier.urihttp://hdl.handle.net/11025/521
dc.format4 s.
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherZápadočeská univerzita v Plzni, Fakulta elektrotechnickács
dc.relation.ispartofseriesElectroscopecs
dc.rightsCopyright © 2007-2010 Electroscope. All Rights Reserved.en
dc.subjectelektro-ultrazvuková spektroskopiecs
dc.subjectsignálcs
dc.subjectšumcs
dc.titleImproved signal to noise ratio of electro-ultrasonic spectroscopyen
dc.typečlánekcs
dc.typekonferenční příspěvekcs
dc.typearticleen
dc.typeconferenceObjecten
dc.rights.accessopenAccessen
dc.type.versionpublishedVersionen
dc.description.abstract-translatedThe paper presents signal to noise consideration of a new NDT method. Tested sample is excited by electrical and ultrasonic signals with different frequencies. On the defect new harmonic signal is created with frequency given by subtraction of exciting frequencies fE and fU. High sensitivity of this method follows from the fact that the signal giving information on tested sample quality has frequency different from exciting signals. The signal to noise ratio and high sensitivity for NDT analyses is based on the application of special electrical filters. The theoretical sensitivity of this method and its limitation by parasitic effects is analyzed. Therefore the new variants of circuitry are designed and used for experimental verifying. First of all the equivalent dynamic range and final sensitivity is improved using linear filters to reduce the level of exciting signals in the amplifier input and by noise in exciting electrical signal reducing. The usability of this principle and possibility of minimization of parasitic effects are confirmed by practical experiments.en
dc.subject.translatedelectro-ultrasonic spectroscopyen
dc.subject.translatedsignalen
dc.subject.translatednoiseen
dc.type.statusPeer-revieweden
Appears in Collections:2008
Konference EDS 2008 (2008)

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