Patent ID: 6763312
Filing Date: 2004-07-13
Classification: G01H

Abstract:
A method of monitoring and analyzing vibrations in a rotating machine having rolling element bearings to determine machine bearing condition comprising the steps ofa. providing an accelerometer to detect an acceleration signal indicative of machine vibration; b. determining the RMS value of said acceleration signal to provide a first signal; c. filtering the acceleration signal for signal frequencies indicative of bearing surface defects, and converting the RMS value of said signal frequencies to a second signal; d. determining the peak value of the acceleration signal, determining the ratio of said peak value to the RMS value of the first acceleration signal and converting said ratio to a third signal; e. determining the square of the peak value of the acceleration signal, determining the ratio of said squared peak value to said first signal and converting said ratio to a fourth signal; f. detecting a signal at the resonant frequency of the accelerometer, demodulating said resonant frequency signal and converting the low frequency component energy of the demodulated components to a fifth signal; and g. combining said second through fifth signals in predetermined weights to obtain a voltage value indicative of the condition of the bearings in the rotating machine.