Patent ID: 11867227
Assignee: MINEBEA MITSUMI IN.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 0:
1. A bearing monitoring apparatus comprising:
a rolling bearing including
an outer ring,
an inner ring disposed coaxially with the outer ring, the inner ring being on an inner peripheral side of the outer ring,
multiple rolling elements disposed between the outer ring and the inner ring, and
a strain gauge configured to detect strain of the outer ring or the inner ring, the strain gauge including at least two resistors, and the resistors being arranged in a same direction as an arrangement direction of the rolling elements so as to correspond to spacing between rolling elements that are next to each other;

a first circuit configured to generate a first distorted waveform based on an output of one resistor of the at least two resistors and to generate a second distorted waveform based on an output of another resistor of the at least two resistors; and
a second circuit configured to:
subtract the second distorted waveform from the first distorted waveform to generate a differential waveform; and
compare the differential waveform against a reference value to detect a wear state of the rolling bearing.