Patent ID: 9008997
Filing Date: 2015-04-14
Classification: G01H

Abstract:
1. A vibration analysis system comprising: a tachometer, a diagnostic engine, and a logic device, wherein the tachometer monitors revolutions of a rotating shaft coupled to a variable frequency drive (VFD) and generates a tachometer signal, the logic device determines speed parameters of the rotating shaft from tachometer signal data collected over a period of time, wherein the logic device selects a maximum revolution, a minimum revolution, and an average revolution of the rotating shaft as the speed parameters, and then, the diagnostic engine correlates the speed parameters with peaks in a vibration spectrum of the VFD to identify faults in a machine coupled to the rotating shaft, and the diagnostic engine derives a conclusion of energy distribution at different frequencies by selecting correlations of the maximum revolution, the minimum revolution, and the average revolution with the peaks from the vibration spectrum of the VFD.