公开(公告)号：US09772189B2

公开(公告)日：2017-09-26

申请号：US14708928

申请日：2015-05-11

Applicant: Honeywell International Inc.

Inventor： Lee K. Strandjord ,  Glen A. Sanders ,  Waymon Ho

IPC: G01C19/72 ,  G01C19/66 ,  G02B6/293

CPC classification number: G01C19/662 ,  G01C19/727 ,  G02B6/2934

Abstract: Systems and methods for resonance switching RFOGs with feed-forward processing are provided. In one embodiment, a system comprises: a fiber optic resonator; first and second laser sources coupled to the resonator, wherein the first source launches a first beam into the resonator and the second source launches a second beam into the resonator in an opposite direction; a first servo loop that locks the first beam to a first resonant mode of the resonator during a first state and to a second resonant mode of the resonator during a second state; a second servo loop that locks the second beam to the second resonant mode during the first state and to the first resonant mode during the second state; a feed-forward rate processor coupled to the servo loops that calculates a FSR average across a prior resonance switching cycle of resonant frequency measurements and applies the average to current measurements.

公开(公告)号：US09267799B2

公开(公告)日：2016-02-23

申请号：US14187589

申请日：2014-02-24

Applicant: Honeywell International Inc.

Inventor： Tiequn Qiu ,  Waymon Ho

IPC: G01C19/72 ,  G01C21/00 ,  G02F2/00

CPC classification number: G01C19/722 ,  G01C19/72 ,  G01C19/727 ,  G01C21/00 ,  G02F2/00

Abstract: A method of measuring beat frequency comprises modulating a first optical signal and a second optical signal, wherein the first modulated optical signal includes a first carrier frequency and a first plurality of sideband frequencies and the second modulated optical signal includes a second carrier frequency and a second plurality of sideband frequencies. The method also comprises combining a fraction of the first modulated optical signal with a fraction of the second modulated optical signal into a combined signal and determining a carrier beat frequency. The method further comprises selecting a frequency range from the combined signal; performing a fast Fourier transform (FFT) on an electrical signal representing the selected frequency range; tracking the carrier beat frequency based on the FFT; and outputting a rate signal based on the tracked carrier beat frequency, the rate signal indicating a rotation rate of the resonator fiber optic gyroscope.

Abstract translation: 测量拍频的方法包括调制第一光信号和第二光信号，其中第一调制光信号包括第一载波频率和第一多个边带频率，第二调制光信号包括第二载波频率和第二载波频率 多个边带频率。 该方法还包括将第一调制光信号的一部分与第二调制光信号的一部分组合成组合信号并确定载波搏动频率。 该方法还包括从组合信号中选择频率范围; 对表示所选择的频率范围的电信号执行快速傅里叶变换（FFT）; 基于FFT跟踪载波拍频; 以及基于跟踪的载波搏动频率输出速率信号，所述速率信号指示所述谐振器光纤陀螺仪的旋转速率。

公开(公告)号：US09683846B2

公开(公告)日：2017-06-20

申请号：US14949552

申请日：2015-11-23

Applicant: Honeywell International Inc.

Inventor： Lee K. Strandjord ,  Waymon Ho ,  Chuck Croker

IPC: G01C19/72

CPC classification number: G01C19/727 ,  G01C19/721 ,  G01C19/726

Abstract: A RFOG, comprising: a master laser emitting a reference optical signal; first and second slave lasers emitting first and second optical signals; an optical resonator ring cavity coupled to the lasers, the first and second optical signals propagating in first and second directions through the optical resonator ring cavity; one or more signal generators to inject first and second modulation signals at first and second frequencies on both optical signals; first and second photodetectors that generate first and second signals; first and second demodulators to demodulate the first and second signals using first and second reference signals and the first and second frequencies; a differencing function to output the difference between resonance frequencies of the first and second signals; at least a third demodulator to detect reference phase errors; and at least one phase servo to adjust the phase of at least one of the first and second reference signals.

公开(公告)号：US20170146346A1

公开(公告)日：2017-05-25

申请号：US14949552

申请日：2015-11-23

Applicant: Honeywell International Inc.

Inventor： Lee K. Strandjord ,  Waymon Ho ,  Chuck Croker

IPC: G01C19/72

CPC classification number: G01C19/727 ,  G01C19/721 ,  G01C19/726

Abstract: A RFOG, comprising: a master laser emitting a reference optical signal; first and second slave lasers emitting first and second optical signals; an optical resonator ring cavity coupled to the lasers, the first and second optical signals propagating in first and second directions through the optical resonator ring cavity; one or more signal generators to inject first and second modulation signals at first and second frequencies on both optical signals; first and second photodetectors that generate first and second signals; first and second demodulators to demodulate the first and second signals using first and second reference signals and the first and second frequencies; a differencing function to output the difference between resonance frequencies of the first and second signals; at least a third demodulator to detect reference phase errors; and at least one phase servo to adjust the phase of at least one of the first and second reference signals.

公开(公告)号：US20160334217A1

公开(公告)日：2016-11-17

申请号：US14708928

申请日：2015-05-11

Applicant: Honeywell International Inc.

Inventor： Lee K. Strandjord ,  Glen A. Sanders ,  Waymon Ho

IPC: G01C19/66

CPC classification number: G01C19/662 ,  G01C19/727 ,  G02B6/2934

Abstract: Systems and methods for resonance switching RFOGs with feed-forward processing are provided. In one embodiment, a system comprises: a fiber optic resonator; first and second laser sources coupled to the resonator, wherein the first source launches a first beam into the resonator and the second source launches a second beam into the resonator in an opposite direction; a first servo loop that locks the first beam to a first resonant mode of the resonator during a first state and to a second resonant mode of the resonator during a second state; a second servo loop that locks the second beam to the second resonant mode during the first state and to the first resonant mode during the second state; a feed-forward rate processor coupled to the servo loops that calculates a FSR average across a prior resonance switching cycle of resonant frequency measurements and applies the average to current measurements.

Abstract translation: 提供了具有前馈处理的共振切换RFOG的系统和方法。 在一个实施例中，系统包括：光纤谐振器; 耦合到所述谐振器的第一和第二激光源，其中所述第一源将第一光束发射到所述谐振器中，并且所述第二光源以相反的方向将第二光束发射到所述谐振器中; 第一伺服回路，在第二状态期间，在所述谐振器的第一状态期间和所述谐振器的第二谐振模式下，将所述第一波束锁定到所述谐振器的第一谐振模式; 第二伺服环路，其在所述第一状态期间将所述第二光束锁定到所述第二谐振模式，并且在所述第二状态期间将所述第二光束锁定到所述第一谐振模式; 耦合到伺服环路的前馈速率处理器，其计算谐振频率测量的先前共振切换周期内的FSR平均值，并将平均值应用于电流测量。

公开(公告)号：US20150241218A1

公开(公告)日：2015-08-27

申请号：US14187589

申请日：2014-02-24

Applicant: Honeywell International Inc.

Inventor： Tiequn Qiu ,  Waymon Ho

IPC: G01C19/72 ,  G01C21/00

CPC classification number: G01C19/722 ,  G01C19/72 ,  G01C19/727 ,  G01C21/00 ,  G02F2/00

Abstract: A method of measuring beat frequency comprises modulating a first optical signal and a second optical signal, wherein the first modulated optical signal includes a first carrier frequency and a first plurality of sideband frequencies and the second modulated optical signal includes a second carrier frequency and a second plurality of sideband frequencies. The method also comprises combining a fraction of the first modulated optical signal with a fraction of the second modulated optical signal into a combined signal and determining a carrier beat frequency. The method further comprises selecting a frequency range from the combined signal; performing a fast Fourier transform (FFT) on an electrical signal representing the selected frequency range; tracking the carrier beat frequency based on the FFT; and outputting a rate signal based on the tracked carrier beat frequency, the rate signal indicating a rotation rate of the resonator fiber optic gyroscope.

Abstract translation: 测量拍频的方法包括调制第一光信号和第二光信号，其中第一调制光信号包括第一载波频率和第一多个边带频率，第二调制光信号包括第二载波频率和第二载波频率 多个边带频率。 该方法还包括将第一调制光信号的一部分与第二调制光信号的一部分组合成组合信号并确定载波搏动频率。 该方法还包括从组合信号中选择频率范围; 对表示所选择的频率范围的电信号执行快速傅里叶变换（FFT）; 基于FFT跟踪载波拍频; 以及基于跟踪的载波搏动频率输出速率信号，所述速率信号指示所述谐振器光纤陀螺仪的旋转速率。