Patent ID: 7509862

Claim:
A system for providing blade vibration analysis of a turbine, wherein the turbine contains a series of blades, a rotor, and a shaft, the system comprising: a non-contacting sensor capable of determining a distance or velocity of a blade, of said series of blades, in relationship to said sensor, wherein said non-contacting sensor provides a non-contacting sensor signal; a tachometer capable of determining a speed of said shaft; and a computer comprising a memory and a processor, said processor configured by said memory to perform the steps of: processing calibration data of said turbine resulting in a processed calibration signal; processing actual condition data of said turbine, resulting in a processed actual condition signal; calculating a time dilation ratio between a calibration data tachometer window and an actual condition data tachometer window; time dilating either a calibration sensor signal or an actual condition sensor signal using said time dilation ratio, resulting in a time dilated sensor signal; rewindowing said time dilated sensor signal around a zero-crossing point of said time dilated sensor signal, resulting in a derived calibration or actual condition sensor signal; and subtracting said derived calibration or actual condition sensor signal from said processed calibration or actual condition signal.