Vibratory gyroscopic device for determining angular velocity

Details Vibratory gyroscopic device for determining angular velocity Vibratory gyroscopic device for determining angular velocity

G - Physics

01

C

G01C 19/56 (2006.01)

Patent

CA 2677860

A vibratory gyroscope comprising a substrate, a ring, at least one capaciti actuator and at least one capacitive sensor, a central support having a diameter smaller than the ring diameter and being coupled with the substrat and a plurality of support springs that are coupled with the ring, the at least one capacitive actuator being capacitively coupled with the ring, for applying an elliptic mode frequency to the ring, the capacitive sensor bein capacitively coupled with the ring, for sensing the changes in capacitance, the device further comprising a. latching assembly for decreasing the aspect ratio between the capacitive sensor and the ring, the assembly having a movable frame, coupled with the capacitive sensor, the movable frame latche from a manufacturing configuration to an operating configuration, in respon to a force applied thereto, wherein, the aspect ratio at the manufacturing configuration is lower than the aspect ratio at the operating configuration.

La présente invention concerne un gyroscope vibratoire qui comprend un substrat, une bague, au moins un actionneur capacitif et au moins un capteur capacitif. Un support central, qui présente un diamètre inférieur au diamètre de la bague, est raccordé au substrat,. Plusieurs ressorts de support sont raccordés à la bague, l'actionneur capacitif étant raccordé de manière capacitive à la bague afin d'appliquer une fréquence de mode elliptique sur la bague. Le capteur capacitif est raccordé de manière capacitive à la bague afin de détecter les changements de capacité. Le dispositif comprend en outre un ensemble de verrouillage servant à diminuer le rapport de forme entre le capteur capacitif et la bague. L'ensemble comprend un cadre mobile couplé au capteur capacitif qui se verrouille en passant d'une configuration de fabrication à une configuration de fonctionnement, en réponse à une force qui lui est appliquée, le rapport de forme dans la configuration de fabrication étant inférieur au rapport de forme dans la configuration de fonctionnement.

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