System and method for providing vibration detection in turbomachinery

A method of providing blade vibration analysis of a turbine, wherein the turbine contains a series of blades, a rotor, and a shaft, the method comprising 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 sensor signal.

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;
• a tachometer capable of determining a speed of said shaft;
• logic configured to process calibration data of said turbine resulting in a processed calibration signal;
• logic configured to process actual condition data of said turbine, resulting in a processed actual condition signal;
• logic configured to calculate a time dilation ratio between a calibration data tachometer window and an actual condition data tachometer window;
• logic configured to time dilate either a calibration sensor signal or an actual condition sensor signal using said time dilation ratio, resulting in a time dilated sensor signal;
• logic configured to rewindow 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
• logic configured to subtract said derived calibration or actual condition sensor signal from said processed calibration or actual condition sensor signal.