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dc.contributor.advisorPalosaari, Mikko
dc.contributor.advisorMaasilta, Ilari
dc.contributor.authorAhola, Oskari
dc.date.accessioned2020-04-20T05:29:36Z
dc.date.available2020-04-20T05:29:36Z
dc.date.issued2020
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/68594
dc.description.abstractEffect of magnetizing frequency on Barkhausen noise signal measurements in dynamic high frequency Barkhausen noise was studied. 100, 250, 500 and 1000 Hz magnetizing frequencies were used in the measurements for three different bearing race samples with several different Barkhausen noise sensors. Sampling rate was decreased and sensor surface velocity was increased linearly with the increasing magnetizing frequency. Measurements were successful with all of the used frequencies. However, the background noise was increased with the higher frequencies. Moving average filtering was used for some of the 1000 Hz measurements in order to decrease background noise. Using the moving average filter to 1000 Hz measurement data improved signal-to-noise ratio up to 205% compared to the original 1000 Hz measurement in some cases and 68% compared to the 100 Hz measurement in some cases. Background noise levels were decreased up to 280% in some cases.en
dc.format.extent122
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.subject.otherBarkhausen noise
dc.subject.otherhigh frequency
dc.subject.othermoving average filtering
dc.subject.otherdynamic measurement
dc.titleEffect of magnetizing voltage frequency on Barkhausen noise signal
dc.identifier.urnURN:NBN:fi:jyu-202004202810
dc.type.ontasotPro gradu -tutkielmafi
dc.type.ontasotMaster’s thesisen
dc.contributor.tiedekuntaMatemaattis-luonnontieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sciencesen
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.oppiaineSoveltava fysiikkafi
dc.contributor.oppiaineApplied Physicsen
dc.rights.copyrightJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.rights.copyrightThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.type.publicationmasterThesis
dc.contributor.oppiainekoodi4023
dc.subject.ysomagnetismi
dc.subject.ysomagnetism
dc.format.contentfulltext
dc.rights.accessrightsTekijä ei ole antanut lupaa avoimeen julkaisuun, joten aineisto on luettavissa vain Jyväskylän yliopiston kirjaston arkistotyösemalta. Ks. https://kirjasto.jyu.fi/fi/tyoskentelytilat/laitteet-ja-tilat..fi
dc.rights.accessrightsThe author has not given permission to make the work publicly available electronically. Therefore the material can be read only at the archival workstation at Jyväskylä University Library (https://kirjasto.jyu.fi/en/workspaces/facilities).en
dc.type.okmG2


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