A three-axis fiber optic gyroscope

G - Physics – 01 – C

Patent

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G01C 19/72 (2006.01)

Patent

CA 2258628

A gyroscope having three fiber optic loops for sensing rates of rotation in three axes orthogonal to one another. The gyroscope has one or two detectors and one source that is shared among the three fiber optic sensing loop subsystems with a special multicoupler configuration. Also, portions of the rotation rate signal processing electronics, whether an open or closed loop configuration, are shared among the three sensing loops. The gyroscope may be a single mode optical fiber depolarized configuration or a polarization maintaining optical fiber configuration.

Gyroscope comportant trois boucles de fibres optiques, permettant de détecter la vitesse de rotation autour de trois axes perpendiculaires les uns aux autres. Le gyroscope comporte un ou deux détecteurs et une seule source qui est partagée entre les trois sous-systèmes de boucles de détection, avec une configuration de multicoupleur spéciale. Certaines parties du dispositif électronique de traitement des signaux de vitesse de rotation, ayant une configuration en boucle ouverte ou en boucle fermée, sont également partagées entre les trois boucles de détection. Le gyroscope peut avoir une configuration dépolarisée de fibre optique monomode ou une configuration de fibre optique conservant la polarisation.

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