US 2013/0096848 A1 · METHODS AND SYSTEMS FOR AUTOMATIC ROLLING-ELEMENT BEARING FAULT DETECTION

Abstract

A method of automatically detecting a rolling-element bearing fault in a rotating machine is provided. The method includes receiving, from at least one sensor, a sensor signal that includes at least one frequency, converting the sensor signal to a digital vibration signal, modifying the vibration signal to generate an envelope signal, and applying a transform to the enveloped signal to generate an envelope spectrum. The method uses certain relationships among envelope spectral line amplitudes and their harmonics to detect bearing faults. As such, the method detects a bearing fault without reference to predefined fault frequencies. Systems for implementing the method are also provided.

Claims20

Dependent claims

A monitoring system comprising:

at least one sensor configured to detect a frequency of at least one rotating component being monitored;
and
a processor programmed to:
receive, from the at least one sensor, a sensor signal that includes at least one frequency indicative of a predetermined condition;
convert the sensor signal to a digital vibration signal;
generate an envelope spectrum from the digital vibration signal;
and
detect a bearing fault based on a fundamental frequency of the envelope spectrum and a first detection threshold.

5 more elements

Dependencies are inferred from the claim text.

Methods and systems for automatic rolling-element bearing fault detection

Life of this patent

Methods and systems for automatic rolling-element bearing fault detection

Life of this patent

Abstract

Claims20