Title:
LOOSENESS DETECTION SENSOR AND LOOSENESS DETECTION METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2021/149248
Kind Code:
A1
Abstract:
This looseness detection sensor, which detects the looseness of a bolt 3 that fixes a component 1, comprises: a resonant part 5 arranged on a head portion 3a of the bolt 3 and made of an insulating material that traps a high-frequency signal input from the outside; and a conductive member 4 that conducts the component 1 with the resonant part 5 interposed therebetween, wherein the conductive member 4 is a cap that covers the head portion 3a of the bolt 3 and includes a protrusion that is in contact with the surface of the component 1.
Inventors:
MATSUNAGA ERI (JP)
MINOTANI TADASHI (JP)
NAKAMURA MASAHITO (JP)
TSUDA MASAYUKI (JP)
MINOTANI TADASHI (JP)
NAKAMURA MASAHITO (JP)
TSUDA MASAYUKI (JP)
Application Number:
PCT/JP2020/002555
Publication Date:
July 29, 2021
Filing Date:
January 24, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
F16B31/02; G01L5/00
Domestic Patent References:
| WO2020090446A1 | 2020-05-07 |
Foreign References:
| US20140129158A1 | 2014-05-08 | |||
| JP2001159572A | 2001-06-12 | |||
| US4294122A | 1981-10-13 | |||
| US20140190267A1 | 2014-07-10 | |||
| US20050284231A1 | 2005-12-29 | |||
| JP2020091169A | 2020-06-11 |
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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