Detecting aging of process sensors with noise signal measurement

Toosi, Topi; Sirola, Miki; Laukkanen, Jarkko; Heeswijk, Mark van; Karhunen, Juha

doi:10.1109/idaacs.2017.8095045

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…Part of this work has been previously published as a conference paper [2]. Compared to the conference paper this work contains new results based on larger and more comprehensive data set.…”

Section: Discussionmentioning

confidence: 99%

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Method for Detecting Aging Related Failures of Process Sensors via Noise Signal Measurement

Toosi¹,

Sirola²,

Laukkanen³

et al. 2019

IJC

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In 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.

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“…Part of this work has been previously published as a conference paper [2]. Compared to the conference paper this work contains new results based on larger and more comprehensive data set.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, after the results of the experiments have been presented the paper concludes with discussion and conclusions. Previous publications from this project include a master's thesis [1]. Also, a part of this work has previously been published as a conference paper [2].…”

Section: Introductionmentioning

confidence: 99%