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Patent Searching and Data


Title:
STATE DIAGNOSIS METHOD, STATE DIAGNOSIS DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/071162
Kind Code:
A1
Abstract:
This state diagnosis method comprises a measurement step for measuring relative permittivities of a lubricant by applying a voltage to the lubricant using an AC power supply while changing the frequency, a derivation step for deriving a parameter expressing an electrical characteristic of the lubricant by applying the relative permittivities measured in the measurement step to a theoretical formula, and a diagnosis step for using the parameter to diagnose the state of the lubricant.

Inventors:
IWASE SHUNSUKE (JP)
MARUYAMA TAISUKE (JP)
Application Number:
PCT/JP2021/035203
Publication Date:
April 07, 2022
Filing Date:
September 24, 2021
Export Citation:
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Assignee:
NSK LTD (JP)
International Classes:
G01N33/30; G01N27/00; G01N27/02; G01N27/22
Domestic Patent References:
WO2011065340A12011-06-03
WO2014094813A12014-06-26
Foreign References:
JP2009198341A2009-09-03
JP2000338101A2000-12-08
JP2017211329A2017-11-30
JP2007192769A2007-08-02
JP2008215901A2008-09-18
JPH07239316A1995-09-12
JP2020163961A2020-10-08
JP2021137562A2021-09-16
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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