Patent ID: 9046000
Filing Date: 2015-06-02
Classification: F01D,F05D,G05B,Y02T

Abstract:
1. A system for identifying a change in turbomachinery blade fingerprint indicative of blade damage, the system comprising: one or more sensors for obtaining a signal representing a blade reflection profile from one or more blades passing by the sensors during one or more revolutions of a rotor comprising the blades; at least one computer-readable storage medium in operable communication with the sensors for storing the blade reflection profiles as test data; a processor in operable communication with the storage medium for obtaining corrected test data by: (a) preparing the test data for comparison with reference data; (b) aligning, by blade, the test data with the reference data; (c) differencing the reference data and the test data to obtain residuals; (d) and calculating total error from the residuals to identify a change in blade fingerprint indicative of blade damage; wherein the processor further comprises means for combining or comparing the corrected test data with reference data to identify a change in the blade reflection profile indicative of blade damage, the means comprising: (a) correlating the corrected test data against reference data to obtain a correlation coefficient R (b) further correcting the test data for blade offset to obtain blade-offset corrected test data by adjusting blade numbers of the test data to align with blade numbers of the reference data.