Title:
ABNORMALITY DIAGNOSTIC DEVICE FOR ROLLING BEARING
Document Type and Number:
Japanese Patent JPH03221818
Kind Code:
A
Abstract:
PURPOSE:To correct diagnose abnormal vibration by detecting the vibration of a bearing part in a rotating machine by a vibration-type acceleration sensor, discriminating a detection signal by plural BPFs, executing envelope processing, comparing the processed signal with a signal outputted from a double integration circuit, and estimating the existence and cause of abnormality based upon the correlation of respective signals. CONSTITUTION:A signal generated from the vibration-type acceleration sensor 3 fixed to a bearing housing 2 for the rotating machine 1 is amplified by an amplifier 4 and supplied to the BPFs 5A to 5D and the double integrator 16. The outputs of the BPFs 5A to 5D are converted into their frequency through envelope circuits 6A to 6D and the converted outputs are supplied to a computer 17. An output signal from the integrator 16 is also supplied to the computer 17. The computer 17 compares the output signals of the circuits 6A to 6D with the output signal of the integrator 16 and estimates the existence and cause of abnormality based upon the correlation of respective input signals.
Inventors:
WATANABE SHUNZO
Application Number:
JP1603390A
Publication Date:
September 30, 1991
Filing Date:
January 29, 1990
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G01M13/04; G01H17/00; (IPC1-7): G01H17/00; G01M13/04
Attorney, Agent or Firm:
Shoko Inomata (1 person outside)