公开(公告)号：US5608525A

公开(公告)日：1997-03-04

申请号：US404817

申请日：1995-03-14

申请人： Tatsuya Kumagai ,  Keiji Abe ,  Munehiro Akiyama ,  Hiroshi Kajioka ,  Hisao Sonobe ,  Shigeru Oho

发明人： Tatsuya Kumagai ,  Keiji Abe ,  Munehiro Akiyama ,  Hiroshi Kajioka ,  Hisao Sonobe ,  Shigeru Oho

IPC分类号： G01C19/72

CPC分类号： G01C19/72

摘要： A photodetector generates an electric signal by receiving a light signal which is obtained by coupling lights having propagated through an optical fiber sensing loop in clock-wise and counter clock-wise directions, and modulated in a phase modulator. The electric signal is detected in a synchronous detection circuit to generate a fundamental wave component of the phase modulation signal, a duplicate harmonic wave component, a quadruple harmonic wave component, and an orthogonal component which is obtained in accordance with a phase shift of the quadruple harmonic wave component by one quarter period.

摘要翻译： 光电检测器通过接收光信号来产生电信号，所述光信号是通过将在光纤传感环路中传播的光沿时钟方向和逆时针方向耦合而获得的，并在相位调制器中进行调制。 在同步检测电路中检测出电信号，生成相位调制信号的基波分量，重复谐波分量，四次谐波分量，以及根据四极的相移得到的正交分量 谐波分量四分之一。

公开(公告)号：US5701177A

公开(公告)日：1997-12-23

申请号：US795293

申请日：1997-02-04

申请人： Tatsuya Kumagai ,  Hiroshi Kajioka ,  Osamu Kobayashi ,  Munehiro Akiyama ,  Shigeru Oho ,  Hisao Sonobe

发明人： Tatsuya Kumagai ,  Hiroshi Kajioka ,  Osamu Kobayashi ,  Munehiro Akiyama ,  Shigeru Oho ,  Hisao Sonobe

IPC分类号： G01C25/00 ,  G01C19/72 ,  G01C19/64

CPC分类号： G01C19/721

摘要： A phase modulated light is propagated through an optical fiber sensing loop, from which a propagated light is obtained. The propagated light is converted to an electric signal, from which a fundamental wave component and even number harmonic wave components of a phase modulating signal for the phase modulated signal are detected. In accordance with the changes of the fundamental and even number harmonic wave components, fault is detected. On the other hand, the electric signal may be integrated to provide an integrated signal. In accordance with the comparison between the integrated signal and a fault reference voltage, the fault may be detected.

摘要翻译： 相位调制光通过光纤感测环路传播，从中获得传播的光。 传播的光被转换成电信号，从中检测相位调制信号的相位调制信号的基波分量和偶次谐波分量。 根据基波和偶次谐波成分的变化，检测到故障。 另一方面，电信号可以被集成以提供积分信号。 根据集成信号与故障参考电压的比较，可以检测到故障。

公开(公告)号：US5555235A

公开(公告)日：1996-09-10

申请号：US305490

申请日：1994-09-13

申请人： Tatsuya Kumagai ,  Hiroshi Kajioka ,  Munehiro Akiyama ,  Shigeru Oho ,  Hisao Sonobe

发明人： Tatsuya Kumagai ,  Hiroshi Kajioka ,  Munehiro Akiyama ,  Shigeru Oho ,  Hisao Sonobe

IPC分类号： G01C19/72

CPC分类号： G01C19/721

摘要： A signal processing circuit of an optical fiber gyro comprises a memory for storing data measured in the signal processing circuit in accordance with angular velocities applied to an optical fiber sensing loop at preparatory stage, and the applied angular velocities. In operation, the memory is accessed in accordance with data obtained in the signal processing circuit at an operation stage, so that an angular velocity is read from the memory without complicated calculation.

摘要翻译： 光纤陀螺仪的信号处理电路包括存储器，用于根据在准备阶段施加到光纤感测回路的角速度和所施加的角速度来存储在信号处理电路中测量的数据。 在操作中，根据在操作阶段在信号处理电路中获得的数据访问存储器，从而在没有复杂计算的情况下从存储器读取角速度。