Error reduction by quasi non-multiplexed signal processing in a

Details Error reduction by quasi non-multiplexed signal processing in a Error reduction by quasi non-multiplexed signal processing in a

1994-07-29

1996-11-19

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356350, G01B 902, G01C 1972

Patent

active

055765343

ABSTRACT:
A digital controller produces control data signals for application to each of three fiber optic rotation sensors in a triaxial rotation sensing system. The digital controller also produces strobe signals corresponding to each fiber optic rotation sensor. The digital controller sequentially provides first, second and third strobe signals that activate the analog converters sequentially to apply modulating signals to the three fiber optic rotation sensors. The system further includes apparatus for providing modulation cycles to keep all three fiber optic rotation sensors active simultaneously. Sampling apparatus samples each sensor sequentially during a .tau. period and feedback modulation control data signals are applied sequentially to the three sensors during the .tau. period for each sensor when the sensor was sampled. Feedback modulation control data signals are isolated from each fiber optic rotation sensor except for the .tau. periods in which it is sampled.

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