Shaft rotation rate sensor for turbine engines

Details Shaft rotation rate sensor for turbine engines Shaft rotation rate sensor for turbine engines

G - Physics

01

P

G01P 3/40 (2006.01) G01D 5/38 (2006.01) G01P 3/486 (2006.01) G02B 5/18 (2006.01)

Patent

CA 2053943

SHAFT ROTATION RATE SENSOR FOR TURBINE ENGINES ABSTRACT OF THE DISCLOSURE A shaft rotation rate sensor for turbine engines. A reflective radial grating on the surface of the turbine shaft is employed in conjunction with an electromagnetic wave source and beam combining elements to mix two beams of frequency f and f ? .DELTA.f, where .DELTA.f is proportional to the rotation rate of the grating. The source energy is re- flected off the grating, and the zero-th and first order transmission from the grating are mixed to give the beat frequency proportional to the rotation rate. The sensor has no moving parts.

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