Patent ID: 7761256
Filing Date: 2010-07-20
Classification: G01H,G01M

Abstract:
1. A method for analyzing vibrations of a variable speed rotating body, said method comprising: producing a signal that is proportional to an acceleration of the rotating body; producing a plurality of pulses using a tachometer, wherein each pulse represents a revolution of the rotating body and is indicative of a vibration sample at a rotational position of the rotating body; converting the signal to a numeric value that is indicative of a vibrational amplitude of the rotating body; converting the plurality of pulses to revolution time periods indicative of a rotational rate of the rotating body; calculating an angular position of the rotating body between each pulse of the tachometer to produce a harmonic vibrational amplitude at a harmonic of the rotational rate of the rotating body; and representing a phase of the harmonic vibrational amplitude relative to the rotational position of the rotating body.