Signal device for turbo-engines using an optical probe with an e

Details Signal device for turbo-engines using an optical probe with an e Signal device for turbo-engines using an optical probe with an e

1994-12-27

1996-09-17

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25055914, 25055917, 73660, 73661, G01J 104

Patent

active

055570992

ABSTRACT:
A signal device for turbo-engines which, by way of moving blades arranged on a rotor, when passing through a defined circumferential position of the housing, generates signals which are precise with respect to time. The device includes a probe which has fiber optical waveguides for emitting and receiving light. An illuminating beam is emitted which is focussed in the direction of the rotor. The probe is arranged on the housing at a distance with respect to free end faces of the moving blades. The probe emits the illuminating beam with an elliptical cross-section, through which the moving blades travel, in such a manner that, on each corresponding free end face, an elliptical illumination spot is imaged whose large axis is aligned essentially in parallel to the delivery-side or suction-side edges of the free end faces. The signals are generated from the light reflected by the free end faces.

REFERENCES:
patent: 4049349 (1977-09-01), Wennerstrom
patent: 4080823 (1978-03-01), Stargardter
patent: 4593566 (1986-06-01), Ellis
patent: 4765742 (1988-08-01), Davinson
patent: 5201227 (1993-04-01), Iinuma et al.
patent: 5293040 (1994-03-01), Watanabe et al.
patent: 5390545 (1995-02-01), Doan

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