Title:
WATER INTRUSION DETECTION METHOD, WATER INTRUSION DETECTION DEVICE, AND PROGRAM FOR DEVICE USING LUBRICANT
Document Type and Number:
WIPO Patent Application WO/2024/019022
Kind Code:
A1
Abstract:
A water intrusion detection method for detecting intrusion of water into a lubricant in a device that is configured such that a plurality of portions thereof are lubricated with the lubricant, the method comprising: measuring the impedance of an electrical circuit formed of the plurality of portions by applying an alternating-current voltage to the electrical circuit while sweeping the frequency of the alternating-current voltage, and comparing characteristics indicated by the real and imaginary parts of the measured impedance with characteristics indicated by the real and imaginary parts of the impedance measured when water is not mixed with the lubricant, to detect the intrusion of water into the lubricant.
Inventors:
IWASE SHUNSUKE (JP)
KOSUGI DAICHI (JP)
MARUYAMA TAISUKE (JP)
KOSUGI DAICHI (JP)
MARUYAMA TAISUKE (JP)
Application Number:
PCT/JP2023/026157
Publication Date:
January 25, 2024
Filing Date:
July 14, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C19/04; F16C19/52; F16C41/00; G01M13/04
Domestic Patent References:
| WO2014094812A1 | 2014-06-26 |
Foreign References:
| JP7057868B1 | 2022-04-20 | |||
| JP2007502411A | 2007-02-08 | |||
| JP2002131188A | 2002-05-09 | |||
| US20180238851A1 | 2018-08-23 | |||
| JP6993652B1 | 2022-01-13 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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