Patent ID: 9404791
Filing Date: 2016-08-02
CPC Classification: G01H

Claim Text:
1. A method for determining vibration associated with a rotordynamic system having a rotating element, the method comprising: detecting passage of a phase reference mark on the rotating element as the phase reference mark rotates through a detection zone associated with a detection device; detecting passage of a plurality of additional marks on the rotating element, wherein the plurality of additional marks are distinguishable from the phase reference mark, as the plurality of additional marks rotate through the detection zone; generating a phase reference signal based on the detection of the phase reference mark and using the phase reference signal to determine a lateral vibration; generating a vibration reference signal based on the detection of the plurality of additional marks and using the vibration reference signal to measure an angular vibration; and applying a correction factor to an amplitude portion of the measured angular vibration to compensate the measured angular vibration.