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    • 1. 发明申请
    • ANGULAR VELOCITY SENSOR
    • 角速度传感器
    • US20100050769A1
    • 2010-03-04
    • US12539841
    • 2009-08-12
    • Kosuke WatanabeKeiichi Okano
    • Kosuke WatanabeKeiichi Okano
    • G01C19/56H01L41/04
    • G01C19/5628
    • An angular velocity sensor includes vibrators, an internal circuit that drives the vibrators to detect an angular velocity signal, a circuit substrate on which components such as an IC and a passive component defining the internal circuit are disposed, and electrically connects the vibrators and the components, and a cap that covers a surface of the circuit substrate and encloses the vibrators and internal circuit. An output signal processed by the internal circuit is output from an external electrode provided on the back surface of the circuit substrate. Vibrator inspection electrodes are provided on the back surface of the circuit substrate, and the vibrator inspection electrodes are electrically connected to surface electrodes of the vibrators. Thus, electrical characteristics of the vibrators can be directly measured after assembly.
    • 角速度传感器包括振动器,驱动振动器以检测角速度信号的内部电路,其上设置有诸如IC和限定内部电路的无源部件的部件的电路基板,并将振动器和部件 以及覆盖电路基板的表面并包围振动器和内部电路的盖。 由内部电路处理的输出信号从设置在电路基板背面的外部电极输出。 振动检查电极设置在电路基板的背面,振子检查电极与振动器的表面电极电连接。 因此,可以在组装之后直接测量振动器的电特性。
    • 2. 发明授权
    • Vibrating gyro
    • 振动陀螺仪
    • US08225659B2
    • 2012-07-24
    • US12540387
    • 2009-08-13
    • Hideaki SugibayashiKeiichi Okano
    • Hideaki SugibayashiKeiichi Okano
    • G01P9/04
    • H01L41/107G01C19/5607
    • A piezoelectric vibrator of a vibration gyro vibrates in response to a drive voltage Vdrv input into a drive electrode, and when deformed by a Coriolis force, generates detection voltages Vagc, between which a potential difference corresponds to the deformation, at detection electrodes. An AGC circuit outputs a drive voltage Vdrv while performing automatic gain control so that the detection voltages Vagc have a given amplitude. A phase inversion circuit and a BTL amplifier circuit output a BTL voltage Vbtl, whose phase is opposite to the detection voltage Vagc and whose amplitude has been increased, to the detection electrodes via detection resistances. The AGC circuit reduces the detection voltages Vagc in order to prevent the drive voltage Vdrv from exceeding a design upper limit value V′drv.
    • 振动陀螺仪的压电振动器响应于输入到驱动电极的驱动电压Vdrv振动,并且当由科里奥利力变形时,在检测电极处产生检测电压Vagc,其间的电位差对应于变形。 AGC电路在执行自动增益控制时输出驱动电压Vdrv,使得检测电压Vagc具有给定的幅度。 相位反转电路和BTL放大电路通过检测电阻向检测电极输出与检测电压Vagc相反且振幅增大的BTL电压Vbt1。 AGC电路减小检测电压Vagc,以防止驱动电压Vdrv超过设计上限值V'drv。
    • 6. 发明申请
    • VIBRATING GYRO
    • 振动陀螺仪
    • US20100058862A1
    • 2010-03-11
    • US12540387
    • 2009-08-13
    • Hideaki SUGIBAYASHIKeiichi Okano
    • Hideaki SUGIBAYASHIKeiichi Okano
    • G01C19/56H01L41/107
    • H01L41/107G01C19/5607
    • A piezoelectric vibrator of a vibration gyro vibrates in response to a drive voltage Vdrv input into a drive electrode, and when deformed by a Coriolis force, generates detection voltages Vagc, between which a potential difference corresponds to the deformation, at detection electrodes. An AGC circuit outputs a drive voltage Vdrv while performing automatic gain control so that the detection voltages Vagc have a given amplitude. A phase inversion circuit and a BTL amplifier circuit output a BTL voltage Vbtl, whose phase is opposite to the detection voltage Vagc and whose amplitude has been increased, to the detection electrodes via detection resistances. The AGC circuit reduces the detection voltages Vagc in order to prevent the drive voltage Vdrv from exceeding a design upper limit value Vdrv.
    • 振动陀螺仪的压电振动器响应于输入到驱动电极的驱动电压Vdrv振动,并且当由科里奥利力变形时,在检测电极处产生检测电压Vagc,其间的电位差对应于变形。 AGC电路在执行自动增益控制时输出驱动电压Vdrv,使得检测电压Vagc具有给定的幅度。 相位反转电路和BTL放大电路通过检测电阻向检测电极输出与检测电压Vagc相反且振幅增大的BTL电压Vbt1。 AGC电路减小检测电压Vagc,以防止驱动电压Vdrv超过设计上限值Vdrv。
    • 8. 发明授权
    • Vibrating gyroscope
    • 振动陀螺仪
    • US08342026B2
    • 2013-01-01
    • US12479935
    • 2009-06-08
    • Hideaki SugibayashiKeiichi Okano
    • Hideaki SugibayashiKeiichi Okano
    • G01C19/56
    • G01C19/5607G01C19/5649
    • A vibrating gyroscope includes two input buffers each arranged to input voltage signals appearing at respective detection electrodes of one of two piezoelectric vibrators. An adding circuit adds up output voltages of the respective input buffers. An amplitude control circuit automatically controls a loop gain such that an output voltage of the adding circuit has a substantially constant amplitude. A phase-shift circuit controls the phase of a drive voltage supplied to the piezoelectric vibrators such that the piezoelectric vibrators oscillate by positive feedback. Two differential amplifier circuits each amplify a voltage difference corresponding to an angular velocity about an axis. Two synchronous detection circuits each perform detection using a synchronizing signal generated from an oscillation signal, and detect a voltage signal corresponding to the angular velocity.
    • 振动陀螺仪包括两个输入缓冲器,每个输入缓冲器被布置成输入出现在两个压电振动器之一的相应检测电极处的电压信号。 加法电路将各个输入缓冲器的输出电压相加。 幅度控制电路自动控制环路增益,使得加法电路的输出电压具有基本恒定的振幅。 相移电路控制提供给压电振动器的驱动电压的相位,使得压电振动器通过正反馈振荡。 两个差分放大器电路各自放大对应于围绕轴的角速度的电压差。 两个同步检测电路各自使用从振荡信号产生的同步信号进行检测,并且检测与角速度对应的电压信号。