Patent ID: 8810173
Filing Date: 2014-08-19
Classification: H02P

Abstract:
1. A system for monitoring at least one operating signal of a rotating machine having an angular position sensing device, the angular position sensing device generating a waveform, the monitoring system comprising: a processor; a memory device in communication with the processor; a detection circuit configured to receive the waveform generated by the angular position sensing device, to detect a feature of the waveform that is repeated at a fixed interval of angular position during each revolution of the machine, and to generate a trigger each time the feature is detected; and a series of instructions executable on the processor to: receive the trigger from the detection circuit; store a plurality of values of the operating signal, wherein one of the plurality of values is stored responsive to receiving each trigger, defining a series of values stored at the fixed interval of angular position; determine a spectral content of the operating signal from the series of values, wherein the spectral content identifies a plurality of components present in the operating signal and each of the plurality of components has a magnitude and a frequency; identify at least one of the plurality of components present in the spectral content of the operating signal as a function of the frequency; and generate an indication of the condition of the rotating machine responsive to the identified component.