Apparatus and method for monitoring turbine blading

Details Apparatus and method for monitoring turbine blading Apparatus and method for monitoring turbine blading

G - Physics

01

M

354/25

G01M 15/00 (2006.01) G01H 1/00 (2006.01)

Patent

CA 1199112

28 ABSTRACT OF THE DISCLOSURE A plurality of proximity sensors are disposed in a turbine flow guide to measure flow guide-to-turbine blade tip distance at various points around the flow guide. The sensor signals are detected and the peak-to- peak voltage of the detected signals provides an indica- tion of the desired distance measurement. The signals are also monitored and if ambient operating conditions causes the signals to exceed predetermined positive or negative thresholds, corrective signals are generated so as to bring the detected signal back into an acceptable range. A proximity sensor is also provided to measure axial movement of the rotor to which the blades are at- tached so that the other sensor signals can be modified as a function of the measured axial position.

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