Diagnostics measure for roller bearings based on variable moiré gratings

•Moiré grating with a variable pitch serves as a diagnostic measure for roller bearings.•Time-averaging of the moiré grating is performed according to the acceleration signal.•Standard data sets describing test to failure experiments are used to validate this approach. This paper is focused on the c...

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Bibliographic Details
Published in:Optics and lasers in engineering 2020-10, Vol.133, p.106137, Article 106137
Main Authors: Saunoriene, Loreta, Palevicius, Paulius, Laukaitis, Giedrius, Trusiak, Maciek, Patorski, Krzysztof, Ragulskis, Minvydas
Format: Article
Language:English
Subjects:
Fault diagnostics
Roller bearing
Time-averaged moiré
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Summary:•Moiré grating with a variable pitch serves as a diagnostic measure for roller bearings.•Time-averaging of the moiré grating is performed according to the acceleration signal.•Standard data sets describing test to failure experiments are used to validate this approach. This paper is focused on the construction of a novel signal processing algorithm for the diagnostics of roller bearings. The proposed approach is based on the computational analysis of time-averaged images produced by specially designed moiré gratings which are deflected from the state of equilibrium according to the recorder vibration signal of the bearing. It is demonstrated that the statistical properties of time-averaged images can be exploited as an effective diagnostics measure of roller bearings. Extensive computational experiments with a dataset provided by the Center for Intelligent Maintenance Systems, University of Cincinnati are used to demonstrate the efficacy of the proposed technique.
ISSN:0143-8166
1873-0302
DOI:10.1016/j.optlaseng.2020.106137