BEARING MONITORING DEVICE AND BEARING MONITORING METHOD

Title:

BEARING MONITORING DEVICE AND BEARING MONITORING METHOD

Document Type and Number:

WIPO Patent Application WO/2020/255860

Kind Code:

A1

Abstract:

This bearing monitoring device has: an outer ring; an inner ring arranged coaxially with the outer ring on the inner peripheral side of the outer ring; a plurality of rolling elements arranged between the outer ring and the inner ring; and a strain gauge that detects a strain on the outer ring or the inner ring, the strain gauge comprising at least two resistors, the resistors each having: a rolling bearing including two resistors arranged in the same direction as the arrangement direction of the rolling element according to the interval between the adjacent rolling elements; a waveform generator that generates a first strain waveform on the basis of the output of one of the resistors and generates a second strain waveform on the basis of the output of the other resistor; a subtraction unit that subtracts the second strain waveform from the first strain waveform and generates a difference waveform; and a comparison unit that compares the difference waveform with a reference value and detects the wear state of the rolling bearing.

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Inventors:

FUJIURA HIDEO (JP)
HIRAI YUKINORI (JP)
TAKATA SHINTARO (JP)

Application Number:

PCT/JP2020/023073

Publication Date:

December 24, 2020

Filing Date:

June 11, 2020

Export Citation:

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Assignee:

MINEBEA MITSUMI INC (JP)

International Classes:

F16C19/06; F16C41/00; G01M13/04

Domestic Patent References:

WO2017203868A1

2017-11-30

Foreign References:

JP2019070570A	2019-05-09
JP2017219469A	2017-12-14
JPH028017B2	1990-02-22
JP2017026445A	2017-02-02
JP2008164448A	2008-07-17
JP4181842B2	2008-11-19
JP2019115681A	2019-07-18

Other References: