Title:
STATE-MONITORING DEVICE AND STATE-MONITORING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/044575
Kind Code:
A1
Abstract:
A data computation unit (150) performs a high-speed Fourier transform on measurement waveform data at least once, generates a converted waveform, calculates a first feature amount from a partial waveform of the converted waveform in at least three feature amount calculation ranges centered about peaks at at least three locations in the converted waveform, calculates a second feature amount from the entirety of the converted waveform, and uses the first feature amount and the second feature amount to determine whether an abnormality in a rolling bearing was produced due to damage of the bearing or due to a change in the state of a lubricant that lubricates the bearing. This makes it possible to provide a state-monitoring device and a state-monitoring method with which it is possible to determine the origin of an abnormality in a rotary machine.
Inventors:
TSUTSUI HIDEYUKI (JP)
Application Number:
PCT/JP2018/030737
Publication Date:
March 07, 2019
Filing Date:
August 21, 2018
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
G01M13/04; F16C41/00
Domestic Patent References:
| WO2011108391A1 | 2011-09-09 |
Foreign References:
| JP2017119285A | 2017-07-06 | |||
| JP2012008030A | 2012-01-12 | |||
| JP2012242336A | 2012-12-10 | |||
| JP2016109647A | 2016-06-20 | |||
| US7421349B1 | 2008-09-02 | |||
| US20170059449A1 | 2017-03-02 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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