Title:
LOOSE DETECTION DEVICE AND LOOSE DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/250382
Kind Code:
A1
Abstract:
A loose detection device 1 in this embodiment includes: a plurality of washers 10A and 10B, each comprising a hole 14 through which a bolt 100A or 100B pass and metals 12 and 13 isolated to each other; transmission lines 20B electrically connecting between metals 12 and between metals 13 of the washers 10A and 10B; and transmission lines 20A including a pair of terminals 21 at one ends thereof and the other ends electrically connected to the metals 12 and 13 of the washer 10A, the loose detection device 1 measuring resonance frequency from the pair of terminals 21 and detecting loose of the bolts 100A and 100B according to the change of the resonance frequency.
Inventors:
MINOTANI TADASHI (JP)
TSUDA MASAYUKI (JP)
MATSUNAGA ERI (JP)
NAKAMURA MASAHITO (JP)
TSUDA MASAYUKI (JP)
MATSUNAGA ERI (JP)
NAKAMURA MASAHITO (JP)
Application Number:
PCT/JP2019/023499
Publication Date:
December 17, 2020
Filing Date:
June 13, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01M13/00; F16B31/02
Foreign References:
| JP2015059819A | 2015-03-30 | |||
| JP2013122418A | 2013-06-20 | |||
| JPS5048518A | 1975-04-30 | |||
| JP2012052854A | 2012-03-15 | |||
| JPS6039523A | 1985-03-01 | |||
| CN106291716A | 2017-01-04 |
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
Download PDF:
Previous Patent: MULTILAYER CIRCUIT SUBSTRATE AND METHOD FOR MANUFACTURING THE SAME
Next Patent: COMPRESSOR, AND AIR CONDITIONING DEVICE
Next Patent: COMPRESSOR, AND AIR CONDITIONING DEVICE