Title:
STATE MONITORING SYSTEM AND WIND POWER GENERATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/142986
Kind Code:
A1
Abstract:
In the present invention, an oscillation sensor measures an oscillation waveform of a machine element. A processing device senses a change in the oscillation waveform. The processing device also includes an evaluation value computation unit and a sensing unit. The evaluation value computation unit computes, continuously over time, an evaluation value for characterizing the effective value of oscillation waveform data outputted from the oscillation sensor within a definite time period. The sensing unit senses a change in the oscillation waveform on the basis of the evaluation value. The evaluation value computation unit computes, as the evaluation value, a value based on the kurtosis and the skewness of the distribution of effective values in the definite time period.
Inventors:
HASEBA TAKASHI (JP)
Application Number:
PCT/JP2018/001794
Publication Date:
August 09, 2018
Filing Date:
January 22, 2018
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
G01M99/00; F03D17/00; G01H17/00; G05B23/02
Domestic Patent References:
| WO2016026558A1 | 2016-02-25 |
Foreign References:
| JP2011252762A | 2011-12-15 | |||
| JP2013544366A | 2013-12-12 | |||
| JP2006161677A | 2006-06-22 | |||
| JP2012008030A | 2012-01-12 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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