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    Position detecting apparatus using a magnetic sensor and a closed magnetic circuit with non-uniform magnetic flux distribution
    1.
    发明授权
    Position detecting apparatus using a magnetic sensor and a closed magnetic circuit with non-uniform magnetic flux distribution 失效
    位置检测装置使用磁传感器和具有不均匀磁通分布的封闭磁路

    公开(公告)号：US4810965A

    公开(公告)日：1989-03-07

    申请号：US906027

    申请日：1986-09-11

    申请人： Yoshiro Fujiwara ,  Michiko Endo ,  Yuji Kojima ,  Noboru Wakatsuki ,  Akira Hirano ,  Kazunari Komenou

    发明人： Yoshiro Fujiwara ,  Michiko Endo ,  Yuji Kojima ,  Noboru Wakatsuki ,  Akira Hirano ,  Kazunari Komenou

    IPC分类号： G01D5/20 ,  G01B7/14 ,  G01R33/04 ,  H01L43/08

    CPC分类号： G01D5/20

    摘要： A position detector having a magnetic sensor for measuring linear or angular displacement, or detecting a position of a body without contact thereto. The detector has a closed circuit including magnets and yokes. The magnetic leakage flux which emanates from the inside surfaces of the yokes is utilized to detect the position of the body. The magnetic sensor is transferred along the inside surfaces of the yokes by a transferring circuit, which senses the magnetic field intensity of the leakage flux distributed thereon. This enables the detector to have a longer measuring range than that of a prior art detectors. An output signal is stable due to the shielding effect of the yokes. The magnetic closed circuit has many magnetic and mechanical configurations. For example, for the magnet, a permanent magnet and an electromagnet can be used. Further, improvements are proposed for enhancing the linearity of the output signal voltage with respect to the transferring distance of the sensing element and for compensating the offset drift of an amplifier or changing the coercive force of permanent magnets.

    摘要翻译： 一种位置检测器，具有用于测量线性或角位移的磁传感器，或者检测身体的位置而不与其接触。 检测器具有包括磁体和轭的封闭电路。 利用从轭的内表面发出的漏磁通来检测身体的位置。 磁传感器通过传递电路沿着轭的内表面传递，传输电路感测分布在其上的漏磁通的磁场强度。 这使得检测器具有比现有技术的检测器更长的测量范围。 输出信号由于磁轭的屏蔽效应而稳定。 磁闭环具有许多磁力和机械结构。 例如，对于磁体，可以使用永磁体和电磁体。 此外，提出了相对于感测元件的传送距离来增强输出信号电压的线性度并且用于补偿放大器的偏移漂移或改变永磁体的矫顽力的改进。

    Piezoelectric resonator using 165.degree. Y-cut LiNbO.sub.3
    2.
    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
    4.
    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。

    Method for producing a piezoelectric resonator
    6.
    发明授权
    Method for producing a piezoelectric resonator 失效
    压电谐振器的制造方法

    公开(公告)号：US4757581A

    公开(公告)日：1988-07-19

    申请号：US938457

    申请日：1986-12-05

    申请人： Sumio Yamada ,  Yoshiro Fujiwara ,  Yuji Kojima ,  Hiroshi Hoshino

    发明人： Sumio Yamada ,  Yoshiro Fujiwara ,  Yuji Kojima ,  Hiroshi Hoshino

    IPC分类号： H03H3/02 ,  H03H9/10 ,  H03H9/17 ,  H01L41/08

    CPC分类号： H03H9/177 ,  H03H3/02 ,  H03H9/1014 ,  Y10T29/42 ,  Y10T29/49144

    摘要： A piezoelectric resonator includes a base plate and a strip-type, energy trapping piezoelectric resonator chip mounted on the base plate. The piezoelectric resonator chip includes a piezoelectric chip plate and a pair of electrode patterns formed on the opposed main surfaces of the piezoelectric chip plate. One main surface of the piezoelectric chip plate faces the base plate and is parallel therewith, and a conductive layer is formed on each end of the main surface facing the base plate. The thickness of the conductive layer is greater than that of the electrode pattern so that the electrode pattern is separated from the base plate. The conductive layer is directly mounted onto a conductive portion of the base plate, so as to electrically connect the electrode pattern and the conductive portion of the base plate.

    摘要翻译： 压电谐振器包括安装在基板上的基板和带式能量捕获压电谐振器芯片。 压电谐振器芯片包括压电芯片板和形成在压电芯片板的相对主表面上的一对电极图案。 压电片片的一个主表面面向基板并与其平行，并且在主表面的与底板相对的每个端部上形成导电层。 导电层的厚度大于电极图案的厚度，使得电极图案与基板分离。 导电层直接安装在基板的导电部分上，以将电极图案和基板的导电部分电连接。