Title:
ABNORMALITY DIAGNOSING DEVICE AND SENSOR DETACHMENT DETECTING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/018112
Kind Code:
A1
Abstract:
Provided is an abnormality diagnosing device capable of detecting detachment of a vibration sensor from an object to be measured. The abnormality diagnosing device is provided with a vibration sensor and a control device. The vibration sensor is attached to an object to be measured and measures vibration of the object to be measured. The control device determines whether the vibration sensor has been detached from the object to be measured, on the basis of data received from the vibration sensor. The control device calculates a first partial overall value in a first frequency band. The control device calculates a second partial overall value in a second frequency band that is higher than the first frequency band. The control device calculates an index value that is correlated with the ratio of the first partial overall value and the second partial overall value. The control device determines whether the vibration sensor has been detached from the object to be measured, on the basis of the index value.
Inventors:
IKEDA HIROSHI (JP)
TAKAHASHI TORU (JP)
TAKAHASHI TORU (JP)
Application Number:
PCT/JP2016/069017
Publication Date:
February 02, 2017
Filing Date:
June 27, 2016
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
G01M99/00; F03D7/04; F03D80/00; G01H17/00
Foreign References:
| JPH0280925A | 1990-03-22 | |||
| JP2005083752A | 2005-03-31 | |||
| JPS62235560A | 1987-10-15 | |||
| JPH0980033A | 1997-03-28 | |||
| JP2015042867A | 2015-03-05 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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