Title:
STATE DIAGNOSIS METHOD, STATE DIAGNOSIS DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/176603
Kind Code:
A1
Abstract:
Provided is a method for diagnosing the state of a bearing device including a plurality of electrically connected rolling bearings, the method comprising: measuring the impedance of the plurality of rolling bearings as a whole by applying a voltage to the plurality of rolling bearings while varying the frequency using an alternating-current power supply; deriving the impedance of each of the plurality of rolling bearings by fitting the measured impedance on the basis of an equivalent circuit in which the plurality of rolling bearings are connected in series; and diagnosing the state of each of the plurality of rolling bearings on the basis of the derived impedance of each of the plurality of rolling bearings.
Inventors:
KOSUGI DAICHI (JP)
IWASE SHUNSUKE (JP)
MARUYAMA TAISUKE (JP)
SHIMIZU YASUYUKI (JP)
IWASE SHUNSUKE (JP)
MARUYAMA TAISUKE (JP)
SHIMIZU YASUYUKI (JP)
Application Number:
PCT/JP2023/008685
Publication Date:
September 21, 2023
Filing Date:
March 07, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
G01M13/04; F16C19/52
Foreign References:
| JP2007239779A | 2007-09-20 | |||
| JP2020193968A | 2020-12-03 | |||
| JP2012237334A | 2012-12-06 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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