公开(公告)号：US07746476B2

公开(公告)日：2010-06-29

申请号：US11776452

申请日：2007-07-11

申请人： Joseph R. Demers ,  Ka Kha Wong ,  Ronald T. Logan, Jr.

发明人： Joseph R. Demers ,  Ka Kha Wong ,  Ronald T. Logan, Jr.

IPC分类号： G01C19/72

CPC分类号： G01C19/728 ,  G01C19/725

摘要： A fiber optic gyroscope including an optical circulator in the path of said first and second beams for providing polarized first and second beams of identical polarization. A phase modulator couples the first and second beams to the first and second end respectively of the fiber loop, and couples for receiving the return first and second beams from the second and first ends respectively of the fiber loop. First and second photodiodes are coupled to the optical circulator for receiving the optical signal from the first and second return beams.

摘要翻译： 一种光纤陀螺仪，包括在所述第一和第二光束的路径中的光循环器，用于提供具有相同极化的偏振的第一和第二光束。 相位调制器将第一和第二光束分别耦合到光纤回路的第一和第二端，并且耦合用于从光纤回路的第二端和第一端分别接收返回的第一和第二光束。 第一和第二光电二极管被耦合到光循环器，用于从第一和第二返回光束接收光信号。

公开(公告)号：US5576534A

公开(公告)日：1996-11-19

申请号：US282754

申请日：1994-07-29

申请人： Juergen K. P. Flamm ,  Daniel A. Tazartes

发明人： Juergen K. P. Flamm ,  Daniel A. Tazartes

IPC分类号： G01C19/72 ,  G01B9/02

CPC分类号： G01C19/728

摘要： A digital controller produces control data signals for application to each of three fiber optic rotation sensors in a triaxial rotation sensing system. The digital controller also produces strobe signals corresponding to each fiber optic rotation sensor. The digital controller sequentially provides first, second and third strobe signals that activate the analog converters sequentially to apply modulating signals to the three fiber optic rotation sensors. The system further includes apparatus for providing modulation cycles to keep all three fiber optic rotation sensors active simultaneously. Sampling apparatus samples each sensor sequentially during a .tau. period and feedback modulation control data signals are applied sequentially to the three sensors during the .tau. period for each sensor when the sensor was sampled. Feedback modulation control data signals are isolated from each fiber optic rotation sensor except for the .tau. periods in which it is sampled.

摘要翻译： 数字控制器产生用于应用于三轴旋转感测系统中的三个光纤旋转传感器中的每一个的控制数据信号。 数字控制器还产生对应于每个光纤旋转传感器的选通信号。 数字控制器顺序提供第一，第二和第三选通信号，其顺序地激活模拟转换器以将调制信号施加到三个光纤旋转传感器。 该系统还包括用于提供调制周期以保持所有三个光纤旋转传感器同时有效的装置。 采样设备在tau周期期间依次对每个传感器进行采样，并且在传感器被采样时，每个传感器的τ周期期间，反馈调制控制数据信号被顺序地应用于三个传感器。 反馈调制控制数据信号与每个光纤旋转传感器隔离，除了其采样的τT周期。

公开(公告)号：US4815853A

公开(公告)日：1989-03-28

申请号：US105178

申请日：1987-10-05

申请人： Herve Lefevre

发明人： Herve Lefevre

IPC分类号： G01C19/64 ,  G01C19/72 ,  G01B9/02

CPC分类号： G01C19/728

摘要： A three-axis fiber-optic interferometer as applicable in particular to a gyrometer comprises three optical fibers forming rings disposed along three different axes. The three optical fibers are fed by a light beam emitted by a single source. A single interference photodetector receives the light beam after transit through the different fibers. Coupling devices couple the second fiber to the first fiber and the third fiber to the second fiber.

摘要翻译： 特别适用于陀螺仪的三轴光纤干涉仪包括沿着三个不同轴设置的形成环的三根光纤。 三根光纤由单个光源发射的光束进给。 单个干涉光电检测器在穿过不同的光纤后接收光束。 耦合装置将第二纤维与第一纤维和第三纤维耦合到第二纤维。

公开(公告)号：US09823076B2

公开(公告)日：2017-11-21

申请号：US15023747

申请日：2014-09-23

申请人： IXBLUE

发明人： Frederic Guattari ,  Cedric Molucon ,  Sebastien Ferrand ,  Eric Ducloux

IPC分类号： G01C19/72 ,  G02B6/293

CPC分类号： G01C19/728 ,  G01C19/721 ,  G02B6/29347

摘要： An interferometric system with multi-axis optical fiber and a method for processing an interferometric signal in such a system, the multi-axis interferometric system includes a light source (1); a plurality of N optical-fiber coils (11, 12), a first optical separation element (3) capable of splitting the source beam (100) into a first split beam (140) and a second split beam (240); shared phase-modulation element (4); a photodetector (2) and a signal-processing system (800). The N optical-fiber coils (11, 12) are connected in parallel, the coils having respective transit times T1, T2, . . . TN that all differ from one another, and the signal-processing system (800) is capable of processing the interferometric signal (720) detected by the shared photodetector (2) as a function of the respective transit times in the various coils.

公开(公告)号：US5854678A

公开(公告)日：1998-12-29

申请号：US672249

申请日：1996-06-28

申请人： Ren-Young Liu ,  Ralph A. Bergh

发明人： Ren-Young Liu ,  Ralph A. Bergh

IPC分类号： G01C19/72

CPC分类号： G01C19/728

摘要： A gyroscope having three fiber optic loops for sensing rates of rotation in three axes orthogonal to one another. The gyroscope has one or two detectors and one source that is shared among the three fiber optic sensing loop subsystems with a special multi-coupler configuration. Also, portions of the rotation rate signal processing electronics, whether an open or closed loop configuration, are shared among the three sensing loops. The gyroscope may be a single mode optical fiber depolarized configuration or a polarization maintaining optical fiber configuration.

摘要翻译： 具有三个光纤回路的陀螺仪，用于感测三个轴线之间的旋转速度。 陀螺仪具有一个或两个检测器和一个在具有特殊多耦合器配置的三个光纤感测环路子系统之间共享的检测器。 此外，旋转速率信号处理电子设备的部分，无论是开路还是闭环配置，都在三个感测回路中共享。 陀螺仪可以是单模光纤去极化配置或偏振保持光纤配置。

公开(公告)号：US5818589A

公开(公告)日：1998-10-06

申请号：US712194

申请日：1991-06-07

申请人： Joachim Scholz ,  Michael Oswald

发明人： Joachim Scholz ,  Michael Oswald

IPC分类号： G01C19/72 ,  G01C19/64

CPC分类号： G01C19/728

摘要： To measure absolute rotations in several directions in space with the aid of interferometers, one interferometer is required for each direction in space. According to the invention, it is proposed to supply a device consisting of several interferometers from a common light source and to switch only the phase modulation impressed on the light rather than the light paths, using time-division multiplexing. The output signals from the interferometers are detected and evaluated with a single detector and evaluating unit.

摘要翻译： 为了通过干涉仪测量空间中的几个方向的绝对旋转，空间中的每个方向都需要一个干涉仪。 根据本发明，提出了从公共光源提供由几个干涉仪组成的装置，并且仅使用时分多路复用仅切换照射在光而不是光路上的相位调制。 用单个检测器和评估单元检测和评估来自干涉仪的输出信号。

公开(公告)号：US5189488A

公开(公告)日：1993-02-23

申请号：US796868

申请日：1991-11-25

申请人： John G. Mark ,  George A. Pavlath ,  Daniel A. Tazartes

发明人： John G. Mark ,  George A. Pavlath ,  Daniel A. Tazartes

IPC分类号： G01C19/72

CPC分类号： G01C19/72 ,  G01C19/728

摘要： Single and multiple axis fiber optic gyroscope systems employ orthogonal sequences to minimize the effects of both intra and inter-axis crosstalk. Sequences for driving electro-optic modulators are derived by examination of underlying primary and secondary demodulation sequences. Such underlying sequences are examined for orthogonality in accordance with a number of selection rules. When the selection rules are satisfied, the corresponding modulation sequences for driving the gyro(s) are identified and applied. By selecting the modulation waveforms in accordance with orthogonality criteria, one is assured of mean-zero bias errors within a predetermined number of loop transit times.

摘要翻译： 单轴和多轴光纤陀螺仪系统采用正交序列来最小化内部和轴间串扰的影响。 用于驱动电光调制器的序列是通过检查潜在的主要和次要解调序列得出的。 根据多个选择规则检查这样的底层序列的正交性。 当满足选择规则时，识别并应用用于驱动陀螺仪的相应调制序列。 通过根据正交性标准选择调制波形，可以确定预定数量的循环传送时间内的平均零偏置误差。

公开(公告)号：US5033854A

公开(公告)日：1991-07-23

申请号：US447560

申请日：1989-12-06

申请人： Anthony Matthews ,  Guy T. Varty ,  J. Scott Darling

发明人： Anthony Matthews ,  Guy T. Varty ,  J. Scott Darling

IPC分类号： G01C19/72

CPC分类号： G01C19/728 ,  G01C19/721

摘要： Apparatus and methods are disclosed for the time division multiplexing of fiberoptic gyros to reduce the amount of control electronics required. Each of a plurality of gyros is sampled at a rate of n.tau., where .tau. is the gyro optical transit time and n is an integer. The sampled signal is fed to a digital signal processor (DSP) for processing and used to form a rate feedback signal. The rate feedback signal is converted to analog form to drive the phase modulator drive of each gyro. In preferred embodiments the multiplexed sample rate is at least ten times the bandwidth of the gyros. The rate data can be filtered and output by the DSP and the DSP can integrate the rate data to give angle data. The use of precision analog circuits is avoided.

摘要翻译： 公开了用于光纤陀螺仪的时分复用的装置和方法，以减少所需的控制电子设备的数量。 以n tau的速率对多个陀螺仪中的每一个进行采样，其中τ是陀螺仪光通过时间，n是整数。 采样信号被馈送到数字信号处理器（DSP）进行处理并用于形成速率反馈信号。 速率反馈信号被转换为模拟形式以驱动每个陀螺仪的相位调制器驱动。 在优选实施例中，多路复用采样率是陀螺仪带宽的至少十倍。 速率数据可以由DSP进行滤波和输出，DSP可以将速率数据集成到角度数据中。 避免使用精密模拟电路。

公开(公告)号：US08351046B2

公开(公告)日：2013-01-08

申请号：US12240574

申请日：2008-09-29

申请人： Joseph Eugene Justin

发明人： Joseph Eugene Justin

IPC分类号： G01C19/72

CPC分类号： G01C19/728

摘要： A multiple nested interferometric fiber optic gyroscope system having varying functions may include a first fiber optic coil, a second fiber optic coil which is smaller than the first fiber optical coil and nested within and transversely to the first fiber optic coil, and a third fiber optic coil which is smaller than the second fiber optical coil and nested within and transversely to the second fiber optic coil.

摘要翻译： 具有变化功能的多重嵌套干涉光纤陀螺仪系统可以包括第一光纤线圈，小于第一光纤线圈并嵌套在第一光纤线圈内并横向于第一光纤线圈的第二光纤线圈，以及第三光纤线圈 线圈，其小于第二光纤线圈并嵌套在第二光纤线圈内并横向于第二光纤线圈。

公开(公告)号：US5365337A

公开(公告)日：1994-11-15

申请号：US967795

申请日：1992-10-28

申请人： L. Jerry Page ,  David R. Bina ,  Daniel R. Lynch ,  William G. Otten

发明人： L. Jerry Page ,  David R. Bina ,  Daniel R. Lynch ,  William G. Otten

IPC分类号： G01C19/72 ,  G02B6/00 ,  H01S3/07 ,  H01S3/083 ,  G01B19/72

CPC分类号： G01C19/721 ,  G01C19/728

摘要： An interferometric fiber-optic gyro system includes a light source and a plurality of optical fiber rings employed to measure angular displacement along three axes. Optical circuit elements interposed between the source and the rings include an optical switch for periodically applying the optical signal to each of the rings individually along three separate optical transmission paths. Included in each of the optical transmission paths is a modal filter, including a polarizer, and a beam splitter which provides two separate beams to the optical ring for counter-propagation through the ring. Compensating birefringent devices are added in the optical circuits to compensate for a residual birefringence introduced by the various optical elements in the circuits. The characteristics of the compensating devices consist of predetermined lengths of polarization preserving, single-mode optical fiber. The birefringence of each of the optical devices is characterized in terms of a total number of beat lengths. A plus or minus sign is assigned to the value of the beat lengths, depending upon the optical axis of the optical device being measured. The birefringent compensating optical fiber is selected so as to cancel the net birefringent effect of the other optical elements in the optical circuit expressed in beat length. The compensating fiber may be distributed in the optical circuit subject to the requirement that each section of optical fiber has an minimum length to assure single-mode transmission.

摘要翻译： 干涉光纤陀螺系统包括光源和用于测量沿三个轴的角位移的多个光纤环。 介于源极和环之间的光电元件包括​​光开关，用于沿着三个单独的光传输路径将光信号周期性地施加到每个环。 包括在每个光传输路径中的是模式滤波器，包括偏振器，和分束器，其向光环提供两个单独的光束，用于通过环的反向传播。 补偿双折射器件被添加到光电路中以补偿由电路中的各种光学元件引入的残留双折射。 补偿装置的特性由预定长度的偏振保持单模光纤组成。 每个光学装置的双折射的特征在于拍子长度的总数。 取决于所测量的光学装置的光轴，加号或减号被分配给拍子长度的值。 选择双折射补偿光纤以抵消以节拍长度表示的光电路中的其它光学元件的净双折射效应。 补偿光纤可以分布在光电路中，要求光纤的每个部分具有最小长度以保证单模传输。