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    • 34. 发明授权
    • Capacitive torque sensor and method of detecting torque
    • 电容式扭矩传感器和扭矩检测方法
    • US06601462B1
    • 2003-08-05
    • US09831486
    • 2001-05-09
    • Toru UenoNaoki WakoTetsuo Yoshida
    • Toru UenoNaoki WakoTetsuo Yoshida
    • G01L314
    • G01L3/106G01M3/103
    • A dielectric layer 32 variable in dielectric constant in dependence upon the strain is formed on at least a part of an outer peripheral surface of a bar 31 having a circular cross section. Interdigital electrodes are faced to the dielectric layer to thereby form a single capacitor. The interdigital electrodes have a plurality of linear electrodes 34a and 34b inclined at a predetermined inclination angle with respect to a center axis of the bar. Preferably, the dielectric layer is provided with a cylindrical insulator 33 faced thereto with a small gap kept therebetween, and the linear electrodes are formed on the peripheral surface of the cylindrical insulator. The linear electrodes may be formed directly on the surface of the dielectric layer.
    • 在具有圆形横截面的条31的外周表面的至少一部分上形成根据应变可变介电常数的介电层32。 叉指电极面对电介质层,从而形成单个电容器。 叉指电极具有相对于条的中心轴以预定倾斜角倾斜的多个线状电极34a和34b。 优选地,电介质层设置有面对其的圆柱形绝缘体33,其间保持有小的间隙,并且线状电极形成在圆柱形绝缘体的外周表面上。 线状电极可以直接形成在电介质层的表面上。
    • 40. 发明授权
    • Gyroscope using circular rod type piezoelectric vibrator
    • 陀螺仪采用圆杆式压电振动器
    • US5336960A
    • 1994-08-09
    • US53963
    • 1993-04-27
    • Hiroshi ShimizuTetsuo YoshidaChikara Mashiko
    • Hiroshi ShimizuTetsuo YoshidaChikara Mashiko
    • G01C19/5642H01L41/08
    • G01C19/5642
    • In a piezoelectric gyroscope system wherein a vibrating body is vibrated in a specific direction by a piezoelectric actuator and is subjected to another vibration in a direction perpendicular to the specific direction due to the Coriolis' force upon being subjected to a rotation of a rotational speed, the perpendicular vibration being detected as an electric signal representative of the rotational speed by a piezoelectric transducer, the vibrating body is made of a circular rod of a piezoelectric material having a plurality of elongated electrodes on the outer surface of the rod, in order to resolve difficulty for mounting piezoelectric transducers onto the vibrating body. A driving signal is applied to predetermined ones of the electrodes to vibrate the rod in a particular diametric direction and an output signal is detected from specific ones of the electrodes according to the vibration due to the Coriolis' force. When an even number of electrodes are provided, those electrodes are formed at equiangularly spaced positions on the outer surface of the rod. When an odd number of electrodes are provided, those electrodes are formed at equiangularly spaced positions within an angular region of (360 angular degrees.times.2/3) on the outer surface of the rod.
    • 在压电陀螺仪系统中,振动体通过压电致动器在特定方向上振动,并且由于受到旋转速度旋转时的科里奥利力而在与特定方向垂直的方向上受到另一振动, 通过压电换能器将垂直振动检测为表示转速的电信号,该振动体由在杆的外表面上具有多个细长电极的压电材料的圆形棒制成,以便分解 将压电换能器安装在振动体上的困难。 将驱动信号施加到预定的电极中以使杆在特定的直径方向上振动,并且根据由科里奥利力产生的振动,从特定的电极检测输出信号。 当设置偶数个电极时,这些电极在杆的外表面上以等角间隔的位置形成。 当提供奇数个电极时,这些电极在杆的外表面上的(360°角度×2/3)的角度区域内以等角间隔的位置形成。