公开(公告)号：US06201923B1

公开(公告)日：2001-03-13

申请号：US09272116

申请日：1999-03-19

申请人： Toshiya Yuhara ,  Hirokazu Soekawa ,  Toshiyuki Tetsu ,  Wataru Ohnuki ,  Shuhei Toyoda ,  Takenori Ichigi

发明人： Toshiya Yuhara ,  Hirokazu Soekawa ,  Toshiyuki Tetsu ,  Wataru Ohnuki ,  Shuhei Toyoda ,  Takenori Ichigi

IPC分类号： G02B600

CPC分类号： G02B6/4457 ,  G01C19/722

摘要： Disclosed is an optical fiber gyroscope comprising a fiber coil composed of a lengthy optical fiber wound therearound in a predetermined number of turns, a coupler for optically coupling an optical fiber led from a light source and an optical fiber led to a photodetector, and an optical IC chip arranged between the fiber coil and the coupler and provided with a phase modulator and a polarizer mounted on an optical waveguide, the optical fiber gyroscope further comprising a fiber coil reel around which the lengthy optical fiber for constructing the fiber coil is wound in the predetermined number of turns, a coupler reel around which the optical fibers led in both directions from the coupler are wound in a predetermined number of turns, and a housing member including a plurality of compartments (reel-placing region, frame, frame) for accommodating at least the both reels, the light source, and the optical IC chip. Accordingly, the optical fiber gyroscope can be easily assembled in unit, and it is possible to effectively reduce the production cost of the optical fiber gyroscope.

摘要翻译： 本发明公开了一种光纤陀螺仪，其特征在于，包括：光纤线圈，其以预定匝数卷绕在其周围的长条光纤构成;光耦合从光源引出的光纤和光纤到光电检测器;光学陀螺仪， IC芯片布置在光纤线圈和耦合器之间，并且设置有安装在光波导上的相位调制器和偏振器，该光纤陀螺仪还包括光纤线圈卷轴，用于构建光纤线圈的冗余光纤围绕其缠绕在 预定匝数，耦合器卷绕在耦合器上的两个方向上的光纤被卷绕成预定匝数;以及壳体构件，其包括多个隔间（卷轴放置区域，框架，框架），用于容纳 至少两个卷轴，光源和光IC芯片。 因此，可以容易地组装光纤陀螺仪，并且可以有效地降低光纤陀螺仪的生产成本。

公开(公告)号：US5471301A

公开(公告)日：1995-11-28

申请号：US223711

申请日：1994-04-05

申请人： Tatsuya Kumagai ,  Hisao Iitsuka ,  Hiroshi Kajioka ,  Wataru Ohnuki ,  Toshiyuki Tetsu

发明人： Tatsuya Kumagai ,  Hisao Iitsuka ,  Hiroshi Kajioka ,  Wataru Ohnuki ,  Toshiyuki Tetsu

IPC分类号： G01C19/72 ,  G01C19/64

CPC分类号： G01C19/721

摘要： In an optical fiber gyro for detecting a rotation angular velocity by Sagnac phase difference of light signals propagated through an optical fiber sensing loop, no polarizer is used, and a light source having a difference in attenuation or amplification factor between two orthogonally polarized lights is used. Alternatively, a light source is optically coupled to an optical coupler for supplying two divided light signals to the sensing loop and receiving the two light signals propagated through sensing loop by an optical fiber of a predetermined length which is set to meet a relation in which a distance difference determined by the predetermined length and a phase difference of two orthogonally polarized lights propagated through the optical fiber is greater than an interference distance of the light source.

摘要翻译： 在用于通过光纤传感回路传播的光信号的Sagnac相位差检测旋转角速度的光纤陀螺仪中，不使用偏振器，并且使用具有两个正交偏振光之间的衰减或放大系数差的光源 。 或者，光源光学耦合到光耦合器，用于向感测环路提供两个分开的光信号，并且通过预定长度的光纤接收通过感测环路传播的两个光信号，该光纤设置为满足以下关系： 通过预定长度确定的距离差和通过光纤传播的两个正交偏振光的相位差大于光源的干涉距离。