公开(公告)号：US5946097A

公开(公告)日：1999-08-31

申请号：US1967

申请日：1997-12-31

申请人： Glen A. Sanders ,  Rudolf C. Dankwort ,  Ralph A. Bergh

发明人： Glen A. Sanders ,  Rudolf C. Dankwort ,  Ralph A. Bergh

IPC分类号： G01C19/72

CPC分类号： G01C19/721

摘要： An apparatus for eliminating or reducing vibration-induced errors due to vibration rectification by applying a variable weighting function at the demodulator or analog-to-digital converter by changing the size of the demodulator reference signal or the converter gain, respectively. The changing is performed within the frequency spectrum of the vibration. Sampling of the detector output may be utilized and the samples are accumulated and processed to remove the variations due to vibration, and the rotation rate is recovered by digital demodulation.

摘要翻译： 一种用于通过分别通过改变解调器参考信号或转换器增益的大小在解调器或模数转换器上应用可变加权函数来消除或减少由于振动整流引起的振动引起的误差的装置。 在振动的频谱范围内进行变化。 可以利用检测器输出的采样，并且对样本进行累积和处理以消除由于振动引起的变化，并且通过数字解调来恢复旋转速率。

公开(公告)号：US5926275A

公开(公告)日：1999-07-20

申请号：US879901

申请日：1997-06-19

申请人： Glen A. Sanders ,  Rudolf C. Dankwort ,  Andrew W. Kaliszek ,  Clarence E. Laskoskie ,  Lee K. Strandjord ,  Daniel L. Sugarbaker ,  Jerry L. Page

发明人： Glen A. Sanders ,  Rudolf C. Dankwort ,  Andrew W. Kaliszek ,  Clarence E. Laskoskie ,  Lee K. Strandjord ,  Daniel L. Sugarbaker ,  Jerry L. Page

IPC分类号： G01C19/72

CPC分类号： G01C19/721 ,  G01C19/728

摘要： A rectification error reducer for a fiber optic gyroscope, which is an intensity servo or compensator for reducing vibration effects in the optical signals caused by modulation at vibration frequencies induced by the gyroscope operating environment. The vibration effects may be detected in signals from the photodiode output in amplitude form which is used in a control system to null out optical intensity variations at the frequencies of vibration.

摘要翻译： 一种用于光纤陀螺仪的整流误差减小器，其是用于减少由由陀螺仪操作环境引起的振动频率下的调制引起的光信号中的振动效应的强度伺服或补偿器。 可以在振幅形式的光电二极管输出的信号中检测振动效应，该控制系统用于消除振动频率处的光强度变化。

公开(公告)号：US5923424A

公开(公告)日：1999-07-13

申请号：US879902

申请日：1997-06-19

申请人： Glen A. Sanders ,  Rudolf C. Dankwort ,  Andrew W. Kaliszek ,  Clarence E. Laskoskie ,  Lee K. Strandjord ,  Daniel L. Sugarbaker ,  Jerry L. Page

发明人： Glen A. Sanders ,  Rudolf C. Dankwort ,  Andrew W. Kaliszek ,  Clarence E. Laskoskie ,  Lee K. Strandjord ,  Daniel L. Sugarbaker ,  Jerry L. Page

IPC分类号： G01C19/72

CPC分类号： G01C19/728 ,  G01C19/721

摘要： A rectification error reducer for a fiber optic gyroscope, which is an intensity servo or compensator for reducing vibration effects in the optical signals caused by modulation at vibration frequencies induced by the gyroscope operating environment. The vibration effects may be detected in signals from the photodiode output in amplitude form which is used in a control system to null out optical intensity variations at the frequencies of vibration.

摘要翻译： 一种用于光纤陀螺仪的整流误差减小器，其是用于减少由由陀螺仪操作环境引起的振动频率下的调制引起的光信号中的振动效应的强度伺服或补偿器。 可以在振幅形式的光电二极管输出的信号中检测振动效应，该控制系统用于消除振动频率处的光强度变化。

公开(公告)号：US6046810A

公开(公告)日：2000-04-04

申请号：US224587

申请日：1998-12-31

申请人： Glen A. Sanders ,  James N. Blake ,  Ralph A. Bergh

发明人： Glen A. Sanders ,  James N. Blake ,  Ralph A. Bergh

IPC分类号： G01C19/72

CPC分类号： G01C19/72

摘要： An interferometric fiber optic gyroscope having compensation electronics to virtually eliminate rotation rate sensing errors caused by Kerr effect in the IFOG due to differing intensities of the counter-propagating beams relative to each other. Compensation accounts for varying intensities of the beams due to all or some changes of: the light beam splitter ratio relative to temperature; fiber coil loss due to temperature and longevity; and the intensity of the light source because of age.

摘要翻译： 具有补偿电子装置的干涉光纤陀螺仪，以实质上消除由于反向传播光束相对于彼此的不同强度而在IFOG中由克尔效应引起的旋转速率检测误差。 由于光束分离器相对于温度的全部或一些变化，补偿考虑到梁的变化强度; 光纤线圈由于温度和寿命而损失; 以及由于年龄而导致的光源强度。

公开(公告)号：US5781300A

公开(公告)日：1998-07-14

申请号：US741464

申请日：1996-10-31

申请人： Lee K. Strandjord ,  Glen A. Sanders ,  Bogdan Szafraniec ,  Ralph A. Bergh

发明人： Lee K. Strandjord ,  Glen A. Sanders ,  Bogdan Szafraniec ,  Ralph A. Bergh

IPC分类号： G01C19/72

CPC分类号： G01C19/72

摘要： A backscatter or secondary wave error reducer for an interferometric fiber optic gyroscope having at least one phase modulator for receiving a square wave bias phase modulation signal and a sine wave carrier suppression modulation signal. The amplitude of the carrier suppression modulation signal is sufficient to greatly reduce the interference between two sets of backscattered or secondary waves of light originating in the Sagnac loop of the gyroscope. Reduction or elimination of the interference of the two sets of secondary waves reduces or eliminates the secondary wave induced rotation rate sensing error. The frequency of the carrier suppression signal is near or equal to an even harmonic of the proper frequency of the Sagnac loop to reduce the sinusoidal or periodic rotation rate sensing error caused by the carrier suppression modulation signal.

摘要翻译： 一种用于干涉光纤陀螺仪的后向散射或二次波衰减器，其具有用于接收方波偏置相位调制信号和正弦波载波抑制调制信号的至少一个相位调制器。 载波抑制调制信号的幅度足以大大减少源自陀螺仪的Sagnac回路的两组反向散射光或二次波之间的干扰。 减少或消除两组二次波的干扰减少或消除二次波感应的旋转速率感测误差。 载波抑制信号的频率接近或等于Sagnac环路的适当频率的偶次谐波，以减少由载波抑制调制信号引起的正弦或周期性转速检测误差。

公开(公告)号：US08908187B2

公开(公告)日：2014-12-09

申请号：US13287422

申请日：2011-11-02

申请人： Lee K. Strandjord ,  Tiequn Qiu ,  Glen A. Sanders

发明人： Lee K. Strandjord ,  Tiequn Qiu ,  Glen A. Sanders

IPC分类号： G01C19/64 ,  G01C19/72

CPC分类号： G01C19/727 ,  G01C19/722

摘要： An exemplary resonator fiber optic gyroscope comprises a resonator having an optical fiber loop; a light source configured to generate a light beam; and an intensity modulation circuit coupled between the light source and the resonator. The intensity modulation circuit is configured to modulate the intensity of the light beam from the light source to output an intensity modulated signal to the resonator. The intensity modulation circuit is configured to produce the intensity modulated signal such that harmonics of the intensity modulated signal which overlap a primary wave of a counter-propagating light beam in the resonator have an amplitude below a predetermined threshold. Amplitudes below the predetermined threshold are negligible.

摘要翻译： 一种示例性的谐振器光纤陀螺仪包括具有光纤回路的谐振器; 被配置为产生光束的光源; 以及耦合在光源和谐振器之间的强度调制电路。 强度调制电路被配置为调制来自光源的光束的强度，以将强度调制信号输出到谐振器。 强度调制电路被配置为产生强度调制信号，使得与谐振器中的相反传播光束的主波重叠的强度调制信号的谐波具有低于预定阈值的幅度。 低于预定阈值的幅度可以忽略不计。

公开(公告)号：US07855789B2

公开(公告)日：2010-12-21

申请号：US12167056

申请日：2008-07-02

申请人： Lee K. Strandjord ,  Glen A. Sanders

发明人： Lee K. Strandjord ,  Glen A. Sanders

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： Systems and methods for performing modulation error correction. An example system applies common phase/frequency modulation to first and second laser beams, a first intensity modulation to the first modulated beam, and a second intensity modulation to the second modulated beam. Signals outputted are demodulated according to the frequency of the common phase/frequency modulation. Then the first of these demodulated signals is demodulated based on the frequency of the intensity modulation of the first beam, and the second of these demodulated signals is demodulated based on the frequency of the intensity modulation of the second beam. Then, rate of rotation is determined based on demodulated signals. Frequencies of the intensity modulations are unequal and not harmonically related, and intensity modulation encodes each light beam with a unique signature.

摘要翻译： 用于执行调制误差校正的系统和方法。 示例性系统将共同相位/频率调制应用于第一和第二激光束，对第一调制光束进行第一强度调制，以及对第二调制光束进行第二强度调制。 输出的信号根据共同相位/频率调制的频率进行解调。 然后，基于第一光束的强度调制的频率对这些解调信号中的第一个进行解调，并且基于第二光束的强度调制的频率对这些解调信号中的第二个进行解调。 然后，基于解调信号确定旋转速率。 强度调制的频率是不相等的，而不是谐波相关的，强度调制对每个光束进行独特的签名编码。

公开(公告)号：US07844152B2

公开(公告)日：2010-11-30

申请号：US12167219

申请日：2008-07-02

申请人： Glen A. Sanders

发明人： Glen A. Sanders

IPC分类号： G02B6/00 ,  H01S3/08 ,  G02F1/01 ,  G01C19/64

CPC分类号： G01C19/727 ,  G02F1/3544 ,  G02F1/37 ,  G02F2203/15

摘要： Systems and methods for compensating for nonlinear phase shift accumulation in an optical ring resonator. An example method includes sending a first beam in a clockwise direction around the optical ring resonator and sending a second beam in a counterclockwise direction around the optical ring resonator. Then, nonlinear phase shift accumulation of the first and second beams is compensated for within the optical ring resonator. Compensating includes creating a negative Kerr effect phase shift for each beam based on an estimate of accumulated positive Kerr effect.

摘要翻译： 用于补偿光环谐振器中的非线性相移累积的系统和方法。 示例性方法包括围绕光环谐振器沿顺时针方向发送第一光束，并沿光环谐振器周围的逆时针方向发送第二光束。 然后，在光环谐振器内补偿第一和第二波束的非线性相移累积。 补偿包括基于积累的正克尔效应的估计为每个波束产生负的克尔效应相移。

公开(公告)号：US20100253948A1

公开(公告)日：2010-10-07

申请号：US12729660

申请日：2010-03-23

申请人： Lee K. Strandjord ,  Glen A. Sanders ,  Norman Gerard Tarleton

发明人： Lee K. Strandjord ,  Glen A. Sanders ,  Norman Gerard Tarleton

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： Systems and methods for improved resonator fiber optic gyroscope intensity modulation control are provided. In one embodiment, a resonant fiber optic gyroscope (RFOG) having a residual intensity modulation (RIM) controller comprises: an intensity modulator optically coupled to receive a light beam from a laser source modulated at a resonance detection modulation frequency; an optical tap device optically coupled to the intensity modulator; and a feedback servo coupled to the optical tap device and the intensity modulator, the demodulating feedback servo generating a sinusoidal feedback signal to the intensity modulator. The feedback servo adjusts an amplitude and phase of the sinusoidal feedback signal provided to intensity modulator based on a residual intensity modulation detected by the demodulating feedback servo.

摘要翻译： 提供了改进谐振器光纤陀螺仪强度调制控制的系统和方法。 在一个实施例中，具有残余强度调制（RIM）控制器的谐振光纤陀螺仪（RFOG）包括：光耦合的光强调制器，用于接收来自以谐振检测调制频率调制的激光源的光束; 与所述强度调制器光耦合的光学抽头装置; 以及耦合到光学抽头装置和强度调制器的反馈伺服器，解调反馈伺服器向强度调制器产生正弦反馈信号。 基于由解调反馈伺服检测到的残余强度调制，反馈伺服调节提供给强度调制器的正弦反馈信号的幅度和相位。

公开(公告)号：US20100033729A1

公开(公告)日：2010-02-11

申请号：US12187932

申请日：2008-08-07

申请人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

发明人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

IPC分类号： G01C19/72 ,  G06G7/48

CPC分类号： G01C19/64

摘要： A computer-implementable method of reducing bias instability in a fiber optic gyroscope includes receiving, with a computer, a first data set enabling the computer to generate a model of the gyroscope, including a light source, a photodetector, and a plurality of optical components and fiber sections coupling the light source to the photodetector, and a light signal to be propagated from the light source to the photodetector. The light signal has an associated wavelength spectrum. For each wavelength of the spectrum, the relative lightwave intensity reaching the photodetector is calculated. A signal-wave intensity and a spurious-wave intensity are determined from the calculated relative lightwave intensities. A scale factor is determined from the signal-wave intensity. The spurious-wave intensity is integrated over the wavelength spectrum of the light source to obtain a total spurious-wave intensity. A rate bias error is determined based on the total spurious-wave intensity and the scale factor.

摘要翻译： 一种降低光纤陀螺仪中的偏压不稳定性的计算机可实现的方法包括：利用计算机接收第一数据组，使得该计算机能够生成陀螺仪的模型，该模型包括光源，光电检测器和多个光学部件 以及将光源耦合到光电检测器的光纤部分，以及从光源传播到光电检测器的光信号。 光信号具有相关的波长谱。 对于光谱的每个波长，计算到达光电检测器的相对光波强度。 从计算的相对光波强度确定信号波强度和寄生波强度。 从信号波强度确定比例因子。 寄生波强度集成在光源的波长光谱上，以获得总的杂散波强度。 基于总杂散波强度和比例因子确定速率偏差误差。