Invention Grant
- Patent Title: Viscosity estimation from demodulated acoustic emission
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Application No.: US15104350Application Date: 2014-12-15
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Publication No.: US10724995B2Publication Date: 2020-07-28
- Inventor: Allan Thomson
- Applicant: AKTIEBOLAGET SKF
- Applicant Address: SE Gothenburg
- Assignee: AKTIEBOLAGET SKF
- Current Assignee: AKTIEBOLAGET SKF
- Current Assignee Address: SE Gothenburg
- Agency: Garcia-Zamor Intellectual Property Law, LLC
- Agent Ruy Garcia-Zamor; Bryan Peckjian
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@7decf2b9
- International Application: PCT/EP2014/077826 WO 20141215
- International Announcement: WO2015/091394 WO 20150625
- Main IPC: G01N29/14
- IPC: G01N29/14 ; G01M13/045 ; G01N29/44 ; G01N33/28 ; G01N33/30

Abstract:
A process for estimating the lubricant viscosity in a bearing comprises the steps of: monitoring acoustic emissions from the bearing with an acoustic emission sensor; monitoring the bearing for at least one of speed, load and temperature; demodulating the acoustic emission signal from the acoustic emission sensor; calculating the root mean square values of the demodulated acoustic emission signal and storing the calculated root mean square values; aligning the root mean square values with values of one or more of speed, load and temperature and storing the aligned values; using the aligned root mean square values, and at least one of speed, load and temperature in a model which calculates viscosity and/or viscosity ratio from the aligned values.
Public/Granted literature
- US20160313228A1 VISCOSITY ESTIMATION FROM DEMODULATED ACOUSTIC EMISSION Public/Granted day:2016-10-27
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