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26 条记录 (耗时 0.018 秒)

    Piezoelectric gyro and method of driving the piezoelectric gyro
    1.
    发明授权
    Piezoelectric gyro and method of driving the piezoelectric gyro 失效
    压电陀螺仪和驱动压电陀螺仪的方法

    公开(公告)号：US06177756B1

    公开(公告)日：2001-01-23

    申请号：US09223282

    申请日：1998-12-30

    申请人： Masanori Yachi ,  Noboru Wakatsuki ,  Sumio Yamada

    发明人： Masanori Yachi ,  Noboru Wakatsuki ,  Sumio Yamada

    IPC分类号： H01L4108

    CPC分类号： G01C19/5607

    摘要： In a piezoelectric gyro, an amplifier 42 receives and amplifies a detected signal from detecting electrodes 19 through 26, and a bandpass filter 43 extracts only a detection-side resonant frequency component from the amplified signal. The extracted resonant frequency component is phase-shifted by a phase-shifting circuit 44, and the resultant signal is passed through a limiting resistor 45 to prepare a constant-current drive signal, and the drive signal is inputted to drive electrodes 11 through 18. As a result, the piezoelectric gyro oscillates self-excitedly at the detection-side resonant frequency. The present invention provides a piezoelectric gyro capable of maintaining a high sensitivity with respect to a change in temperature by improving detection sensitivity.

    摘要翻译： 在压电陀螺仪中，放大器42接收并放大来自检测电极19至26的检测信号，带通滤波器43仅从放大信号中提取检测侧谐振频率分量。 所提取的谐振频率分量被移相电路44相移，并且所得到的信号通过限制电阻器45以制备恒流驱动信号，并且驱动信号被输入到驱动电极11至18。 结果，压电陀螺以检测侧共振频率自激振荡。 本发明提供一种能够通过提高检测灵敏度来维持相对于温度变化的高灵敏度的压电陀螺仪。

    Piezoelectric actuator
    2.
    发明授权
    Piezoelectric actuator 失效
    压电执行器

    公开(公告)号：US06404108B1

    公开(公告)日：2002-06-11

    申请号：US09219367

    申请日：1998-12-23

    申请人： Masanori Yachi ,  Noboru Wakatsuki ,  Sumio Yamada

    发明人： Masanori Yachi ,  Noboru Wakatsuki ,  Sumio Yamada

    IPC分类号： H01L4108

    CPC分类号： H01L41/042 ,  F04D33/00 ,  H01H57/00 ,  H01L41/0825

    摘要： A piezoelectric actuator includes a main driver electrode 4 and a sensor electrode 5. A feedback signal is generated from the sensor electrode 5 in order to eliminate a primary vibration mode due to a primary resonance frequency. The main driver electrode extends to a fixture portion of the actuator, the fixture portion being fitted into a support member 11. The extending portion of the main driver electrode eliminates the electromechanical coupling against a secondary vibration mode due to a second resonance frequency. Features of the piezoelectric actuator suppress the resonance phenomenon, thus improving the response characteristics of the actuator.

    摘要翻译： 压电致动器包括主驱动电极4和传感器电极5.从传感器电极5产生反馈信号，以消除由初级共振频率引起的主振动模式。 主驱动器电极延伸到致动器的固定部分，固定部分装配到支撑构件11中。由于第二共振频率，主驱动器电极的延伸部分消除了针对二次振动模式的机电耦合。 压电致动器的特征抑制共振现象，从而提高致动器的响应特性。

    Piezoelectric resonator using 165.degree. Y-cut LiNbO.sub.3
    8.
    发明授权
    Piezoelectric resonator using 165.degree. Y-cut LiNbO.sub.3 失效
    使用165°Y切割LiNbO3的压电谐振器

    公开(公告)号：US4583019A

    公开(公告)日：1986-04-15

    申请号：US613187

    申请日：1984-05-23

    申请人： Sumio Yamada ,  Yoshiro Fujiwara ,  Noboru Wakatsuki ,  Yuji Kojima

    发明人： Sumio Yamada ,  Yoshiro Fujiwara ,  Noboru Wakatsuki ,  Yuji Kojima

    IPC分类号： H03H9/05 ,  H03H9/10 ,  H03H9/17 ,  H01L41/08

    CPC分类号： H03H9/177 ,  H03H9/02031 ,  H03H9/0547 ,  H03H9/1014

    摘要： A piezoelectric resonator with a rectangular parallelepiped resonator. A lithium niobate single crystal is used as the resonator chip material. Each of the opposed main surfaces of the resonator chip is arranged to be a surface of a rotated Y-cut plate which is rotated 165.+-.5 degrees about an X-axis. The angle of the longitudinal direction of the resonator chip is arranged to be 90.+-.5 degrees with respect to the X-axis of the rotated Y-cut plate.

    摘要翻译： 一种具有矩形平行六面体谐振器的压电谐振器。 使用铌酸锂单晶作为谐振器芯片材料。 谐振器芯片的相对的主表面中的每一个被布置为旋转的Y切割板的表面，其相对于X轴旋转165 +/- 5度。 谐振器芯片的纵向方向的角度相对于旋转的Y切割板的X轴设置为90 +/- 5度。

    LiTaO.sub.3 Piezoelectric resonator
    10.
    发明授权
    LiTaO.sub.3 Piezoelectric resonator 失效
    LiTaO3压电谐振器

    公开(公告)号：US4454444A

    公开(公告)日：1984-06-12

    申请号：US467810

    申请日：1983-02-18

    申请人： Yoshiro Fujiwara ,  Sumio Yamada ,  Hiroshi Hoshino ,  Noboru Wakatsuki

    发明人： Yoshiro Fujiwara ,  Sumio Yamada ,  Hiroshi Hoshino ,  Noboru Wakatsuki

    IPC分类号： H03H9/02 ,  H03H9/05 ,  H03H9/17 ,  H01L41/08

    CPC分类号： H03H9/02031 ,  H03H9/02157 ,  H03H9/177

    摘要： A piezoelectric resonator which resonates in thickness shear mode. The piezoelectric resonator includes a strip shaped resonance chip made of an X-cut plate of lithium tantalate crystal and having a rectangular cross-section. Electrodes are formed at the center portion with respect to the longitudinal direction of the resonance chip on each of two X-plane surfaces. The width of the electrodes is equal to the width of the resonance chip. The longitudinal direction of the resonance chip inclines with respect to the Y-axis by an angle of 50.degree..+-.2' in the clockwise direction in the X-plane so as to make the longitudinal direction of the resonance chip coincide with the displacement direction of primary oscillation of the crystal. Optimal ratios of the dimensions of the resonance chip and terminal connectors at the ends of the resonance chip are given to reduce spurious response. The temperature characteristic is optimized by selecting rotation angles about the Y-and Z-axes in relation to the amount of trapped energy.

    摘要翻译： 一种在厚度剪切模式下谐振的压电谐振器。 压电谐振器包括由钽酸锂晶体的X切割板制成并具有矩形横截面的带状共振芯片。 在两个X平面中的每一个上，相对于谐振芯片的纵向的中心部形成电极。 电极的宽度等于谐振芯片的宽度。 谐振芯片的纵向方向在X平面中沿着顺时针方向相对于Y轴倾斜50度+/- 2'的角度，以使谐振芯片的纵向方向与位移一致 晶体主振荡方向。 谐振芯片端部的谐振芯片和端子连接器的尺寸的最佳比例被给出以减少杂散响应。 通过相对于被捕获能量的量选择关于Y轴和Z轴的旋转角来优化温度特性。