Vibratory sensor operating as a rate gyro about two axes and...

G - Physics – 01 – C

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G01C 19/56 (2006.01) G01P 9/04 (2006.01)

Patent

CA 2398325

A vibrating structure gyroscope comprises a resonant body, drive transducer means for driving resonant motion of the body, pick-off means for producing signals representative of the resonant motion, and signal processing means for extracting z-axis orientation information and x- and y-axis rate information from the signals. The resonant body is planar and the resonant motion takes place in a vibration mode pattern whose orientation angle with respect to the body varies in accordance with z-axis orientation of the body and couples energy into an out-of-plane response mode motion in accordance with rotation of the body about the x- or y-axis. Signal processing means resolves the out- of-plane response mode motion with reference to a z-axis orientation signal to extract the x- and y-axis rate information.

L'invention concerne un gyroscope à structure vibratoire comprenant un corps résonant, un dispositif transducteur de commande destiné à commander le mouvement de résonance du corps, un dispositif capteur destiné à produire des signaux représentatifs du mouvement de résonance, et un dispositif de traitement du signal destiné à obtenir à partir des signaux des informations relatives à l'orientation de l'axe Z et des informations de mesure relatives aux axes X et Y. Le corps résonant est planaire et le mouvement de résonance s'effectue selon un schéma de mode de vibration dont l'angle d'orientation par rapport au corps varie en fonction de l'orientation de l'axe Z du corps et couple l'énergie sous forme d'un mouvement de mode de réponse hors plan correspondant à la rotation du corps autour des axes X ou Y. Le dispositif de traitement du signal résout le mouvement de mode de réponse hors plan à l'aide du signal d'orientation de l'axe Z afin d'obtenir les informations de mesure des axes X et Y.

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