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CA2084502A1 - Modulation frequency control in a fiber optic rotation sensor - Google Patents

Modulation frequency control in a fiber optic rotation sensor

Info

Publication number
CA2084502A1
CA2084502A1 CA 2084502 CA2084502A CA2084502A1 CA 2084502 A1 CA2084502 A1 CA 2084502A1 CA 2084502 CA2084502 CA 2084502 CA 2084502 A CA2084502 A CA 2084502A CA 2084502 A1 CA2084502 A1 CA 2084502A1
Authority
CA
Grant status
Application
Patent type
Prior art keywords
loop
component
signal
frequency
eigenfrequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2084502
Other languages
French (fr)
Other versions
CA2084502C (en )
Inventor
Carl M. Ferrar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell Inc
Original Assignee
Carl M. Ferrar
United Technologies Corporation
Honeywell Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58Turn-sensitive devices without moving masses
    • G01C19/64Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/72Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers

Abstract

In a fiber optic rotation sensor having a pair of light waves counter-propagating in an optical waveguide loop, a phase modulator is driven by a modulating signal at the loop eigenfrequency. Upon exiting the loop the waves are combined into a light intensity signal which is sensed, the sensed signal including a component in quadrature with a desired rotation rate component, the magnitude of the quadrature component being proportional to any deviations in the frequency of the modulating signal from the loop eigenfrequency. The phase modulator is servo-controlled so as to drive the quadrature component to zero, thereby compensating for any deviations in the modulator frequency from the loop eigenfrequency.
CA 2084502 1990-06-04 1991-05-24 Modulation frequency control in a fiber optic rotation sensor Expired - Fee Related CA2084502C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US07533196 US5090809A (en) 1990-06-04 1990-06-04 Modulation frequency control in a fiber optic rotation sensor
US07/533,196 1990-06-04
PCT/US1991/003701 WO1991019167A1 (en) 1990-06-04 1991-05-24 Modulation frequency control in a fiber optic rotation sensor

Publications (2)

Publication Number Publication Date
CA2084502A1 true true CA2084502A1 (en) 1991-12-05
CA2084502C CA2084502C (en) 2001-03-20

Family

ID=24124906

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2084502 Expired - Fee Related CA2084502C (en) 1990-06-04 1991-05-24 Modulation frequency control in a fiber optic rotation sensor

Country Status (6)

Country Link
US (1) US5090809A (en)
EP (1) EP0532679B1 (en)
JP (1) JP2769924B2 (en)
CA (1) CA2084502C (en)
DE (2) DE69103147T2 (en)
WO (1) WO1991019167A1 (en)

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US5473945A (en) * 1990-02-14 1995-12-12 The Charles Stark Draper Laboratory, Inc. Micromechanical angular accelerometer with auxiliary linear accelerometer
US5357817A (en) * 1990-04-19 1994-10-25 Charles Stark Draper Laboratory, Inc. Wide bandwidth stable member without angular accelerometers
US5605598A (en) * 1990-10-17 1997-02-25 The Charles Stark Draper Laboratory Inc. Monolithic micromechanical vibrating beam accelerometer with trimmable resonant frequency
US5408119A (en) * 1990-10-17 1995-04-18 The Charles Stark Draper Laboratory, Inc. Monolithic micromechanical vibrating string accelerometer with trimmable resonant frequency
US5170225A (en) * 1991-02-22 1992-12-08 Ferrar Carl M Determining optical signal transit delay time in an optical interferometer
US5635639A (en) * 1991-09-11 1997-06-03 The Charles Stark Draper Laboratory, Inc. Micromechanical tuning fork angular rate sensor
US5331852A (en) * 1991-09-11 1994-07-26 The Charles Stark Draper Laboratory, Inc. Electromagnetic rebalanced micromechanical transducer
US5408877A (en) * 1992-03-16 1995-04-25 The Charles Stark Draper Laboratory, Inc. Micromechanical gyroscopic transducer with improved drive and sense capabilities
US5767405A (en) * 1992-04-07 1998-06-16 The Charles Stark Draper Laboratory, Inc. Comb-drive micromechanical tuning fork gyroscope with piezoelectric readout
US5349855A (en) * 1992-04-07 1994-09-27 The Charles Stark Draper Laboratory, Inc. Comb drive micromechanical tuning fork gyro
US5388458A (en) * 1992-11-24 1995-02-14 The Charles Stark Draper Laboratory, Inc. Quartz resonant gyroscope or quartz resonant tuning fork gyroscope
US5555765A (en) * 1993-02-10 1996-09-17 The Charles Stark Draper Laboratory, Inc. Gimballed vibrating wheel gyroscope
US5650568A (en) 1993-02-10 1997-07-22 The Charles Stark Draper Laboratory, Inc. Gimballed vibrating wheel gyroscope having strain relief features
US5646348A (en) 1994-08-29 1997-07-08 The Charles Stark Draper Laboratory, Inc. Micromechanical sensor with a guard band electrode and fabrication technique therefor
US5581035A (en) 1994-08-29 1996-12-03 The Charles Stark Draper Laboratory, Inc. Micromechanical sensor with a guard band electrode
US5725729A (en) * 1994-09-26 1998-03-10 The Charles Stark Draper Laboratory, Inc. Process for micromechanical fabrication
DE69614532D1 (en) * 1995-06-07 2001-09-20 Honeywell Inc Natural frequency of follow-up means for fiber optic sensor coil
US5817942A (en) * 1996-02-28 1998-10-06 The Charles Stark Draper Laboratory, Inc. Capacitive in-plane accelerometer
US5892153A (en) * 1996-11-21 1999-04-06 The Charles Stark Draper Laboratory, Inc. Guard bands which control out-of-plane sensitivities in tuning fork gyroscopes and other sensors
US5783973A (en) 1997-02-24 1998-07-21 The Charles Stark Draper Laboratory, Inc. Temperature insensitive silicon oscillator and precision voltage reference formed therefrom
US5911156A (en) * 1997-02-24 1999-06-08 The Charles Stark Draper Laboratory, Inc. Split electrode to minimize charge transients, motor amplitude mismatch errors, and sensitivity to vertical translation in tuning fork gyros and other devices
US5952574A (en) * 1997-04-29 1999-09-14 The Charles Stark Draper Laboratory, Inc. Trenches to reduce charging effects and to control out-of-plane sensitivities in tuning fork gyroscopes and other sensors
EP1490699A1 (en) * 2002-03-26 2004-12-29 The Charles Stark Draper Laboratory, INC. Microelectromechanical sensors having reduced signal bias errors and methods of manufacturing the same
US6823733B2 (en) * 2002-11-04 2004-11-30 Matsushita Electric Industrial Co., Ltd. Z-axis vibration gyroscope
US7038783B2 (en) * 2003-05-23 2006-05-02 Honeywell International Inc. Eigen frequency detector for Sagnac interferometers
US7872758B2 (en) * 2007-01-22 2011-01-18 The Charles Stark Draper Laboratory, Inc. Determining and compensating for modulator dynamics in interferometric fiber-optic gyroscopes
US7855789B2 (en) * 2007-07-06 2010-12-21 Honeywell International Inc. RFOG modulation error correction
US7817284B2 (en) * 2007-08-08 2010-10-19 The Charles Stark Draper Laboratory, Inc. Interferometric fiber optic gyroscope with off-frequency modulation signals
US8187902B2 (en) * 2008-07-09 2012-05-29 The Charles Stark Draper Laboratory, Inc. High performance sensors and methods for forming the same
US7973938B2 (en) * 2008-09-24 2011-07-05 Honeywell International Inc. Bias-reduced fiber optic gyroscope with polarizing fibers
US8446589B2 (en) * 2009-03-06 2013-05-21 Honeywell International Inc. Residual intensity modulation (RIM) control loop in a resonator fiber-optic gyroscope (RFOG)
US8294900B2 (en) 2009-04-01 2012-10-23 Honeywell International Inc. Systems and methods for resonator fiber optic gyroscope intensity modulation control
US8223341B2 (en) 2010-05-28 2012-07-17 Honeywell International Inc. System and method for enhancing signal-to-noise ratio of a resonator fiber optic gyroscope
US8213019B2 (en) 2010-09-07 2012-07-03 Honeywell International Inc. RFOG with optical heterodyning for optical signal discrimination
KR101262174B1 (en) * 2011-05-19 2013-05-15 광주과학기술원 An optical fiber probe is two-dimensionally scanned with the magnetic drive means consist of a single solenoid capable
US8717575B2 (en) 2011-08-17 2014-05-06 Honeywell International Inc. Systems and methods for environmentally insensitive high-performance fiber-optic gyroscopes
US8908187B2 (en) 2011-11-02 2014-12-09 Honeywell International Inc. System and method for reducing errors in a resonator fiber optic gyroscope
US8947671B2 (en) 2013-02-22 2015-02-03 Honeywell International Inc. Method and system for detecting optical ring resonator resonance frequencies and free spectral range to reduce the number of lasers in a resonator fiber optic gyroscope
US9157741B2 (en) * 2013-03-14 2015-10-13 Raytheon Company Simulator for simulating the operation of a fiber optic gyroscope
US9008221B2 (en) 2013-04-01 2015-04-14 Honeywell International Inc. Spurious frequency attenuation servo
US9001336B1 (en) 2013-10-07 2015-04-07 Honeywell International Inc. Methods and apparatus of tracking/locking resonator free spectral range and its application in resonator fiber optic gyroscope
CN104359491B (en) * 2014-11-02 2017-05-10 中国航天科工集团第二研究院七〇六所 Screening test light source apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157425B (en) * 1984-03-29 1987-08-12 British Aerospace Fibre interferometric sensors
DE3436249A1 (en) * 1984-10-03 1986-04-03 Licentia Gmbh Method for measuring absolute rotations and arrangement for carrying out the method
GB8611394D0 (en) * 1986-05-08 1986-10-29 British Aerospace Fibre optic gyroscopes
US4883358A (en) * 1987-09-02 1989-11-28 Japan Aviation Electronics Industry Limited Fiber optic gyro stabilized by harmonic components of detected signal

Also Published As

Publication number Publication date Type
DE69103147D1 (en) 1994-09-01 grant
WO1991019167A1 (en) 1991-12-12 application
US5090809A (en) 1992-02-25 grant
JPH05507560A (en) 1993-10-28 application
DE69103147T2 (en) 1994-12-08 grant
EP0532679A1 (en) 1993-03-24 application
JP2769924B2 (en) 1998-06-25 grant
CA2084502C (en) 2001-03-20 grant
EP0532679B1 (en) 1994-07-27 grant

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