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    • 54. 发明授权
    • Antenna with fixed and movable elements
    • 天线固定和可移动元件
    • US5818392A
    • 1998-10-06
    • US557808
    • 1995-11-14
    • Shinji OkaEiichi NakanishiTetsuo OnoderaHiroshi Shimizu
    • Shinji OkaEiichi NakanishiTetsuo OnoderaHiroshi Shimizu
    • H01Q21/28H01Q1/24H01Q1/27H01Q9/32H04B1/38
    • H01Q1/244
    • In a mobile radio transceiver, an antenna has a fixed element and a movable element. When the movable element is in an extended state, the movable element functions. On the other hand, when the movable element is in a retracted state, the fixed element functions. An impedance matching circuit preferentially performs impedance matching relative to the fixed element. A reactance element is further provided which is connected to the movable element when the movable element is in the extended state. On the other hand, the reactance element is out of connection to the movable element when the movable element is in the retracted state. With this arrangement, the impedance matching circuit and the reactance element cooperatively achieve impedance matching relative to the movable element when the movable element functions. Alternatively, if the impedance matching circuit preferentially performs impedance matching relative to the movable element, the reactance element is connected to the fixed element when the fixed element functions.
    • 在移动无线电收发机中,天线具有固定元件和可移动元件。 当可移动元件处于伸展状态时,可移动元件起作用。 另一方面,当可动元件处于缩回状态时,固定元件起作用。 阻抗匹配电路优先执行相对于固定元件的阻抗匹配。 还提供了一个电抗元件,当可移动元件处于伸出状态时,该电抗元件连接到可移动元件。 另一方面,当可移动元件处于缩回状态时,电抗元件与可移动元件不连接。 利用这种布置,当可移动元件起作用时,阻抗匹配电路和电抗元件协调地实现相对于可移动元件的阻抗匹配。 或者,如果阻抗匹配电路相对于可动元件优先进行阻抗匹配,则当固定元件起作用时,电抗元件连接到固定元件。
    • 57. 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。