Patent ID: 9476318
Filing Date: 2016-10-25
CPC Classification: F01D,G01B,G01M

Claim Text:
1. A method, comprising receiving clearance signals representative of clearances between a rotating component and a stationary casing surrounding the rotating component from at least one sensing device; selecting a first window of signals and a second window of signals from the clearance signals; determining a first signed average power value corresponding to the first window of signals, and a second signed average power value corresponding to the second window of signals, wherein the first signed average power value is an average of products of sign of instantaneous voltage values of the first window of signals and squares of the instantaneous voltage values of the first window of signals and wherein the second signed average power value is an average of products of sign of instantaneous voltage values of the second window of signals and squares of the instantaneous voltage values of the second window of signals; determining a resultant value based upon the first signed average power value and the second signed average power value; determining one or more defects or potential defects in the rotating component based upon the resultant value; and planning maintenance of the rotating component based on the determined one or more defects or the potential defects.