×

Abnormality diagnostic device for rolling bearing, wind turbine generation apparatus and abnormality diagnostic system

  • US 9,423,290 B2
  • Filed: 12/24/2010
  • Issued: 08/23/2016
  • Est. Priority Date: 01/04/2010
  • Status: Active Grant
First Claim
Patent Images

1. An abnormality diagnostic device for a rolling bearing, comprising:

  • a vibration sensor for measuring a vibration waveform of the rolling bearing; and

    a processing unit for diagnosing an abnormality of said rolling bearing,said processing unit including;

    a first operation unit calculating an effective value of said vibration waveform measured by using said vibration sensor,an envelope processing unit generating an envelope waveform of said vibration waveform by performing envelope processing on said vibration waveform measured by using said vibration sensor,a filter extracting an AC component of said envelope waveform generated by said envelope processing unit,a second operation unit calculating an effective value of the AC component of said envelope waveform extracted by said filter, anda diagnostic unit diagnosing the abnormality of said rolling bearing based on transition of time changes in the effective value of said vibration waveform calculated by said first operation unit and the effective value of the AC component of said envelope waveform calculated by said second operation unit.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×