Title:
ABNORMALITY DETECTION DEVICE AND ABNORMALITY DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/187454
Kind Code:
A1
Abstract:
This abnormality detection device detects abnormalities in a rotation mechanism 104 including a rotating shaft 101, a bearing 102 that supports the rotating shaft 101 in a rotatable manner, and a gear 103 that rotates integrally with the rotating shaft 101. The abnormality detection device compares an actual rotational fluctuation characteristic of the rotating shaft 101 when the rotating shaft 101 is rotating at a specific rotation speed with a normal rotational fluctuation characteristic, and detects an abnormality in the rotation mechanism 104 resulting from seizure of the bearing 102 if the amount of upward shift of the actual rotational fluctuation characteristic relative to the normal rotational fluctuation characteristic is greater than or equal to a bearing abnormality determination threshold and detects an abnormality in the rotation mechanism 104 resulting from wear of the gear 103 if the amount of increase in the amplitude of the actual rotational fluctuation characteristic relative to the normal rotational fluctuation characteristic is greater than or equal to a gear abnormality determination threshold.
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Inventors:
HAYASHI KENGO (JP)
Application Number:
PCT/JP2021/010516
Publication Date:
September 23, 2021
Filing Date:
March 16, 2021
Export Citation:
Assignee:
ISUZU MOTORS LTD (JP)
International Classes:
G01M99/00; G01M13/021; G01M13/04
Foreign References:
| JPS5754835A | 1982-04-01 | |||
| JP2017175775A | 2017-09-28 | |||
| JP2016008536A | 2016-01-18 |
Attorney, Agent or Firm:
HIBIYA Yukihiko et al. (JP)
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