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dc.contributor.authorToosi, Topi
dc.contributor.authorSirola, Miki
dc.contributor.authorLaukkanen, Jarkko
dc.contributor.authorvan Heeswijk, Mark
dc.contributor.authorKarhunen, Juha
dc.date.accessioned2019-08-16T11:05:08Z
dc.date.available2019-08-16T11:05:08Z
dc.date.created2019-08-13T11:00:22Z
dc.date.issued2019
dc.identifier.citationInternational Scientific Journal of Computing. 2019, 18 (2), 135-146.nb_NO
dc.identifier.issn1727-6209
dc.identifier.urihttp://hdl.handle.net/11250/2608743
dc.description.abstractIn this article we examine the methods for detecting and predicting aging related process sensor failures by analyzing the noise of the sensor output signal. The study uses data from non-differential and differential pressure transmitters used in the pressure and water level measurements of the reactor pressure vessels of units 1 and 2 of the Olkiluoto nuclear power plant in Finland. The article contains a review of the current methods for detection of sensor failures. Additionally, we present a new method for detecting changes in the sensor output signal. The method creates fingerprints of the power spectra of the sensors by using Principal Component Analysis (PCA). The changes in these fingerprints together with the measurements of the redundant sensors can be used to detect indications of some of the impending sensor failures. In the experimental study we are able to produce stable fingerprints for both the non-differential and differential pressure transmitters. Also, a potential failure in one of the differential pressure transmitters in Olkiluoto unit 2 is detected by inspecting the fingerprints and analyzing the spectral changes of the transmitter output signal.nb_NO
dc.language.isoengnb_NO
dc.relation.urihttp://www.computingonline.net/computing/article/view/1412
dc.titleMethod for detecting aging related failures of process sensors via noise signal measurementnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber135-146nb_NO
dc.source.volume18nb_NO
dc.source.journalInternational Scientific Journal of Computingnb_NO
dc.source.issue2nb_NO
dc.identifier.cristin1715524
cristin.unitcode7492,5,10,0
cristin.unitnameRisiko, sikkerhet og sikring
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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