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    • 9. 发明申请
    • VIBRATING GYROSCOPE INCLUDING PIEZOELECTRIC FILM
    • 振动胶片包括压电薄膜
    • US20120125100A1
    • 2012-05-24
    • US13387165
    • 2010-05-13
    • Ryuta ArakiTakafumi MoriguchiTakashi IkedaHiroshi NishidaYasuyuki Hirata
    • Ryuta ArakiTakafumi MoriguchiTakashi IkedaHiroshi NishidaYasuyuki Hirata
    • G01C19/56
    • G01C19/5684
    • A vibrating gyroscope according to this invention includes a ring-shaped vibrating body 11 having a uniform plane, leg portions 15 flexibly supporting the ring-shaped vibrating body, a plurality of electrodes 13a, 13b, . . . , 13h that are disposed on the plane of or above the ring-shaped vibrating body and are formed with one of an upper-layer metallic film and a lower-layer metallic film, and a piezoelectric film being sandwiched between the upper-layer metallic film and the lower-layer metallic film in a thickness direction thereof. When one of the driving electrodes 13a for exciting a primary vibration of the ring-shaped vibrating body 11 in a vibration mode of cos Nθ is referred to as a reference driving electrode, the remaining plurality of electrodes 13b, . . . , 13h are disposed at specific positions. Such disposition allows this vibrating gyroscope to detect a secondary vibration inclusive of an out-of-plane vibration mode. A voltage for suppressing the secondary vibration is applied to a suppression electrode 13j.
    • 根据本发明的振动陀螺仪包括具有均匀平面的环形振动体11,柔性地支撑环形振动体的腿部15,多个电极13a,13b。 。 。 ,13h,其设置在环状振动体的平面上方,形成有上层金属膜和下层金属膜中的一层,压电膜夹在上层金属膜 和下层金属膜的厚度方向。 在振动模式为cos N& t s的情况下激励环状振动体11的主振动的驱动电极13a之一; 被称为参考驱动电极,剩余的多个电极13b,。 。 。 ,13h处于特定位置。 这种配置允许该振动陀螺仪检测包括平面内振动模式的二次振动。 用于抑制二次振动的电压被施加到抑制电极13j。