CN108168537A - The detecting system and method for resonance type optical gyroscope based on quadrature demodulation - Google Patents
The detecting system and method for resonance type optical gyroscope based on quadrature demodulation Download PDFInfo
- Publication number
- CN108168537A CN108168537A CN201810119508.1A CN201810119508A CN108168537A CN 108168537 A CN108168537 A CN 108168537A CN 201810119508 A CN201810119508 A CN 201810119508A CN 108168537 A CN108168537 A CN 108168537A
- Authority
- CN
- China
- Prior art keywords
- signal
- module
- optical
- phase
- modulation
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers 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
- G01C19/721—Details
Abstract
The invention discloses a kind of detecting systems and method of the resonance type optical gyroscope based on quadrature demodulation.The present invention carries out phase-modulation to the laser for being input to optics ring resonator first, and quadrature demodulation is synchronized to the output signal clockwise and anticlockwise for going out chamber, wherein quadrature demodulated signal goes control laser frequency as error signal by servo loop after signal processing all the way so that laser output light frequency-tracking is locked on this all the way resonant frequency；In addition quadrature demodulated signal exports after signal processing as gyro signal all the way.The detection method of resonance type optical gyroscope provided by the invention is conducive to automatically adjust demodulation phase to sensitivity maximum point；The phase noise of the device in system circuit is inhibited, improves the signal-to-noise ratio of system.
Description
Technical field
The present invention relates to signal detection technique field more particularly to a kind of detections of the resonance type optical gyroscope of quadrature demodulation
System and method.Resonant mode gyro is included using fiber annular resonant cavity as the resonance type optical fiber gyro of sensing element and with optical waveguide
Resonator is the resonance type integrated optical gyroscope of core sensing element.
Background technology
Resonance type optical gyroscope (Resonator Optic Gyro, ROG) is to be realized using optics Sagnac effects to turning
A kind of high-precision mini inertial sensor of dynamic detection.The resonance type optical gyroscope of component without friction has miniaturization, precision
The advantages that height, anti-vibration.Compared to micromechanical gyro (Micro Electro Mechanical Systems, MEMS) and interference formula
Optical fibre gyro (Interferometric Fiber Optical Gyroscope, IFOG), ROG is by the advantage with bigger.
Since Sagnac effects are a kind of very faint effects, and the optical noise of resonance type optical gyroscope is again very
By force, therefore in resonance type optical gyroscope system, signal modulation is occupied very importantly with detection and noise reduction techniques
Position.When system signal demodulates, need to manually adjust the sensitivity maximum that phase causes system, this is unfavorable for the industry of gyro system
Metaplasia is produced.And there are phase noises for the instrument in system, this can be impacted to the output of gyro.
Invention content
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of resonance type optical gyroscopes based on quadrature demodulation
Detecting system and method.
The purpose of the present invention is achieved through the following technical solutions：
A kind of detecting system of the resonance type optical gyroscope based on quadrature demodulation, it include tunable laser, optics every
The light formed from device, optical splitters, first phase modulator, second phase modulator, optical resonator, photoelectric conversion module
System and by the modulation /demodulation module of signal, feedback lock module, the first signal processing module, second signal processing module
The signal processing system of composition；
Tunable laser, optical isolator and optical splitters are sequentially connected, optical splitters respectively with first phase
Modulator, second phase modulator are connected, and first phase modulator is connected with optical resonator, second phase modulator and optics
Resonator is connected, and optical resonator, photoelectric conversion module and modulating and demodulating signal module are sequentially connected, modulating and demodulating signal module
It is connected with first phase modulation module, modulating and demodulating signal module is connected with second phase modulation module, modulating and demodulating signal mould
Block, the first signal processing module, feedback lock module and tunable laser are sequentially connected, modulating and demodulating signal module and second
Signal processing module is connected.
The detection method of said detecting system, includes the following steps：
(1) phase-modulation：The laser sent out by tunable laser passes through optical splitters point after optical isolator
Two identical beams of success rate, then respectively by first phase modulator and second phase modulators modulate, specifically：Signal tune
Demodulation module processed generates carrier suppressed modulation signal U1(t) and U2(t) first phase modulator and second phase modulation are respectively driven
Device completes phase-modulation, and this completes the phase-modulations and carrier wave of the light counterclockwise and clockwise to entering optical resonator
Inhibit；
(2) quadrature demodulation of signal：By the two-beam of phase-modulation, optical resonator is inputted, is formed counterclockwise and suitable
Two resonance light beams of hour hands, this two-beam respectively enter photodetector and are converted into electric signal, the production of modulating and demodulating signal module
The raw electric signal being converted into respectively to light beam clockwise with frequency orthogonal signalling is demodulated, and generates demodulated signal U3(t) and U4(t)；
The electric signal that the generation of modulating and demodulating signal module is respectively converted into light beam counterclockwise with frequency orthogonal signalling is demodulated, and generates solution
Adjust signal U5(t) and U6(t)；
(3) signal processing of quadrature demodulated signal：In second signal processing module, the clockwise orthogonal solution of two-way
Adjust signal U3(t) and U4(t), respectively square after be added, then open radical sign and obtain non-negative even function signal U7(t), according to therein
The positive negativity of quadrature demodulated signal is come to U all the way7(t) overturn (can judge, such as U according to the parameter setting of system3(t) for just
When, enable U7(t) it is just U3(t) to bear when, U is enabled7(t) it is negative), finally obtain odd function signal U8(t)；In the first signal processing
In module, anticlockwise two-way quadrature demodulated signal U5(t) and U6(t), respectively square after be added, then open radical sign and obtain
Non-negative even function signal U9(t), according to the positive negativity of quadrature demodulated signal all the way therein come to U9(t) being overturn (can basis
The parameter setting judgement of system, such as U5(t) it is timing, enables U9(t) it is just U5(t) to bear when, U is enabled9(t) it is negative), it finally obtains
Odd function signal U10(t)；
(4) gyro signal exports：Inverse time needle path signal transmits after the processing of the first signal processing module as error signal
To feedback lock module, feedback lock module carries out it feedback control tunable laser after ratio and integral operation processing；
Up time needle path signal after the processing of second signal processing module, as resonance type optical gyroscope signal, is exported to data record
Instrument.
A kind of detecting system of the resonance type optical gyroscope based on quadrature demodulation, which is characterized in that it includes tunable sharp
Light device, optical isolator, optical splitters, first phase modulator, second phase modulator, third phase modulator, optics
The optical system and believed by the modulation /demodulation module of signal, feedback lock module, first that resonator, photoelectric conversion module are formed
The signal processing system that number processing module, second signal processing module, servo shift frequency module are formed；
Tunable laser, optical isolator and optical splitters are sequentially connected, optical splitters respectively with first phase
Modulator, second phase modulator are connected, and first phase modulator, third phase modulator and optical resonator are sequentially connected,
Second phase modulator is connected with optical resonator, and optical resonator, photoelectric conversion module and modulating and demodulating signal module are successively
It is connected, modulating and demodulating signal module is connected with first phase modulator, modulating and demodulating signal module and second phase modulator phase
Even, modulating and demodulating signal module, the first signal processing module, feedback lock module and tunable laser are sequentially connected, signal
Modulation /demodulation module, second signal processing module, servo shift frequency module and third phase modulator are sequentially connected.
The detection method of said detecting system, includes the following steps：
(1) phase-modulation：The laser sent out by tunable laser passes through optical splitters point after optical isolator
Two identical beams of success rate, then respectively by first phase modulator and second phase modulators modulate, specifically：Signal tune
Demodulation module processed generates carrier suppressed modulation signal U1(t) and U2(t) first phase modulator and second phase modulation are respectively driven
Device completes phase-modulation, and this completes the phase-modulations and carrier wave of the light counterclockwise and clockwise to entering optical resonator
Inhibit；
(2) quadrature demodulation of signal：By the two-beam of phase-modulation, optical resonator is inputted, is formed counterclockwise and suitable
Two resonance light beams of hour hands, this two-beam respectively enter photodetector and are converted into electric signal；Modulating and demodulating signal module is produced
The raw electric signal being converted into respectively to light beam clockwise with frequency orthogonal signalling is demodulated, and generates demodulated signal U3(t) and U4(t)；
The electric signal that the generation of modulating and demodulating signal module is respectively converted into light beam counterclockwise with frequency orthogonal signalling is demodulated, and generates solution
Adjust signal U5(t) and U6(t)；
(3) signal processing of quadrature demodulated signal：In second signal processing module, the clockwise orthogonal solution of two-way
Adjust signal U3(t) and U4(t), respectively square after be added, then open radical sign and obtain non-negative even function signal U7(t), according to therein
The positive negativity of quadrature demodulated signal is come to U all the way7(t) overturn (can judge, such as U according to the parameter setting of system3(t) for just
When, enable U7(t) it is just U3(t) to bear when, U is enabled7(t) it is negative), finally obtain odd function signal U8(t)；In the first signal processing
In module, anticlockwise two-way quadrature demodulated signal U5(t) and U6(t), respectively square after be added, then open radical sign and obtain
Non-negative even function signal U9(t), according to the positive negativity of quadrature demodulated signal all the way therein come to U9(t) being overturn (can basis
The parameter setting judgement of system, such as U5(t) it is timing, enables U9(t) it is just U5(t) to bear when, U is enabled9(t) it is negative), it finally obtains
Odd function signal U10(t)。
(4) gyro signal exports：Inverse time needle path signal, is transmitted to instead after the first signal processing module as error signal
Locking module is presented, feedback lock module carries out it feedback control tunable laser after ratio and integral operation processing, up time
Needle path signal after second signal processing module, is transmitted to servo shift frequency module, finally acts on third phase modulator, make
It obtains up time needle path to be also operated on resonant frequency point, shift frequency amount is the rotation output signal of gyro.
The device have the advantages that：
1. the detection method of resonance type optical gyroscope provided by the invention is conducive to automatically adjust demodulation phase to sensitivity
Maximum point.
2. the detection method of resonance type optical gyroscope provided by the invention inhibits the system device of resonance type optical gyroscope
Phase noise, improve the signal-to-noise ratio of system.
3. the detection method of resonance type optical gyroscope provided by the invention can inhibit the back of the body to dissipate while phase noise is inhibited
Noise improves the stability of system.
Description of the drawings
Fig. 1 is the structure diagram of the detecting system of the resonance type optical gyroscope of the first quadrature demodulation of the present invention.
Fig. 2 is the structure diagram of the detecting system of the resonance type optical gyroscope of second of quadrature demodulation of the present invention.
Fig. 3 is the curve synoptic diagram that quadrature demodulation exports after signal processing.
Resonant frequency is illustrated with laser frequency relationship clockwise and anticlockwise when Fig. 4 is resonance type optical gyroscope rotation
Figure.
Fig. 5 is the specific implementation case schematic diagram of the detecting system of the resonance type optical gyroscope based on quadrature demodulation.
In figure：1st, tunable laser, 2, isolator, 3, optical splitters, 4, first phase modulator 5, second phase
Modulator, 6, first annular device, the 7, second circulator, 8, optical resonator, the 9, first photodetector, the 10, second photoelectricity is visited
Survey device, 11, modulating and demodulating signal module, the 12, first signal processing module, 13, feedback lock module, 14, second signal processing
Module, 15, data logger.
Specific embodiment
With reference to embodiment and attached drawing, the present invention will be described in detail, but the present invention is not limited only to this.
As shown in Figure 1, a kind of detecting system of the resonance type optical gyroscope based on quadrature demodulation, which is characterized in that it is wrapped
Include tunable laser, optical isolator, optical splitters, first phase modulator, second phase modulator, optical resonance
The optical system and the modulation /demodulation module, feedback lock module, the first signal by signal that chamber, photoelectric conversion module are formed
Manage module, the signal processing system that second signal processing module is formed；
Tunable laser, optical isolator and optical splitters are sequentially connected, optical splitters respectively with first phase
Modulator, second phase modulator are connected, and first phase modulator is connected with optical resonator, second phase modulator and optics
Resonator is connected, and optical resonator, photoelectric conversion module and modulating and demodulating signal module are sequentially connected, modulating and demodulating signal module
It is connected with first phase modulation module, modulating and demodulating signal module is connected with second phase modulation module, modulating and demodulating signal mould
Block, the first signal processing module, feedback lock module and tunable laser are sequentially connected, modulating and demodulating signal module and second
Signal processing module is connected.
The detection method of said detecting system, includes the following steps：
(1) phase-modulation：The laser sent out by tunable laser passes through optical splitters point after optical isolator
Two identical beams of success rate, then respectively by first phase modulator and second phase modulators modulate, specifically：Signal tune
Demodulation module processed generates carrier suppressed modulation signal U1(t) and U2(t) first phase modulator and second phase modulation are respectively driven
Device completes phase-modulation, and this completes the phase-modulations and carrier wave of the light counterclockwise and clockwise to entering optical resonator
Inhibit；
(2) quadrature demodulation of signal：By the two-beam of phase-modulation, optical resonator is inputted, is formed counterclockwise and suitable
Two resonance light beams of hour hands, this two-beam respectively enter photodetector and are converted into electric signal, the production of modulating and demodulating signal module
The raw electric signal being converted into respectively to light beam clockwise with frequency orthogonal signalling is demodulated, and generates demodulated signal U3(t) and U4(t)；
The electric signal that the generation of modulating and demodulating signal module is respectively converted into light beam counterclockwise with frequency orthogonal signalling is demodulated, and generates solution
Adjust signal U5(t) and U6(t)；
(3) signal processing of quadrature demodulated signal：In second signal processing module, the clockwise orthogonal solution of two-way
Adjust signal U3(t) and U4(t), respectively square after be added, then open radical sign and obtain non-negative even function signal U7(t), according to therein
The positive negativity of quadrature demodulated signal is come to U all the way7(t) overturn (can judge, such as the present embodiment according to the parameter setting of system
In, U3(t) it is timing, enables U7(t) it is just U3(t) to bear when, U is enabled7(t) it is negative), finally obtain odd function signal U8(t)；
In first signal processing module, anticlockwise two-way quadrature demodulated signal U5(t) and U6(t), respectively square after be added, so
After open radical sign and obtain non-negative even function signal U9(t), according to the positive negativity of quadrature demodulated signal all the way therein come to U9(t) into
Row overturning, (it can be judged according to the parameter setting of system, in the present embodiment, U5(t) it is timing, enables U9(t) it is just U5(t) it is
When negative, U is enabled9(t) it is negative), finally obtain odd function signal U10(t)；
(4) gyro signal exports：Inverse time needle path signal transmits after the processing of the first signal processing module as error signal
To feedback lock module, feedback lock module carries out it feedback control tunable laser after ratio and integral operation processing；
Up time needle path signal after the processing of second signal processing module, as resonance type optical gyroscope signal, is exported to data record
Instrument.
As shown in Fig. 2, a kind of detecting system of the resonance type optical gyroscope based on quadrature demodulation, which is characterized in that it is wrapped
Include tunable laser, optical isolator, optical splitters, first phase modulator, second phase modulator, third phase tune
Device processed, optical resonator, the optical system that photoelectric conversion module is formed and modulation /demodulation module by signal, feedback lock mould
The signal processing system that block, the first signal processing module, second signal processing module, servo shift frequency module are formed；
Tunable laser, optical isolator and optical splitters are sequentially connected, optical splitters respectively with first phase
Modulator, second phase modulator are connected, and first phase modulator, third phase modulator and optical resonator are sequentially connected,
Second phase modulator is connected with optical resonator, and optical resonator, photoelectric conversion module and modulating and demodulating signal module are successively
It is connected, modulating and demodulating signal module is connected with first phase modulator, modulating and demodulating signal module and second phase modulator phase
Even, modulating and demodulating signal module, the first signal processing module, feedback lock module and tunable laser are sequentially connected, signal
Modulation /demodulation module, second signal processing module, servo shift frequency module and third phase modulator are sequentially connected.
The detection method of said detecting system, includes the following steps：
(1) phase-modulation：The laser sent out by tunable laser passes through optical splitters point after optical isolator
Two identical beams of success rate, then respectively by first phase modulator and second phase modulators modulate, specifically：Signal tune
Demodulation module processed generates carrier suppressed modulation signal U1(t) and U2(t) first phase modulator and second phase modulation are respectively driven
Device completes phase-modulation, and this completes the phase-modulations and carrier wave of the light counterclockwise and clockwise to entering optical resonator
Inhibit；
(2) quadrature demodulation of signal：By the two-beam of phase-modulation, optical resonator is inputted, is formed counterclockwise and suitable
Two resonance light beams of hour hands, this two-beam respectively enter photodetector and are converted into electric signal；Modulating and demodulating signal module is produced
The raw electric signal being converted into respectively to light beam clockwise with frequency orthogonal signalling is demodulated, and generates demodulated signal U3(t) and U4(t)；
The electric signal that the generation of modulating and demodulating signal module is respectively converted into light beam counterclockwise with frequency orthogonal signalling is demodulated, and generates solution
Adjust signal U5(t) and U6(t)；
(3) signal processing of quadrature demodulated signal：In second signal processing module, the clockwise orthogonal solution of two-way
Adjust signal U3(t) and U4(t), respectively square after be added, then open radical sign and obtain non-negative even function signal U7(t), according to therein
The positive negativity of quadrature demodulated signal is come to U all the way7(t) overturn (can judge, such as the present embodiment according to the parameter setting of system
In, U3(t) it is timing, enables U7(t) it is just U3(t) to bear when, U is enabled7(t) it is negative), finally obtain odd function signal U8(t)；
In first signal processing module, anticlockwise two-way quadrature demodulated signal U5(t) and U6(t), respectively square after be added, so
After open radical sign and obtain non-negative even function signal U9(t), according to the positive negativity of quadrature demodulated signal all the way therein come to U9(t) into
Row overturning (it can be judged according to the parameter setting of system, in the present embodiment, U5(t) it is timing, enables U9(t) it is just U5(t) it is negative
When, enable U9(t) it is negative), finally obtain odd function signal U10(t)。
(4) gyro signal exports：Inverse time needle path signal, is transmitted to instead after the first signal processing module as error signal
Locking module is presented, feedback lock module carries out it feedback control tunable laser after ratio and integral operation processing, up time
Needle path signal after second signal processing module, is transmitted to servo shift frequency module, finally acts on third phase modulator, make
It obtains up time needle path to be also operated on resonant frequency point, shift frequency amount is the rotation output signal of gyro.
As shown in figure 3, give the output demodulation curve of the resonance type optical gyroscope based on quadrature demodulation.It is anti-to demodulate curve
Resonant frequency difference has been answered with solving the relationship of modulation.Intermediate linear zone is the working range of gyro, when gyro rotates,
It is poor that resonant frequency can be generated, demodulation value is not just 0 yet.Pass through calibration coefficient, you can calculate the rotational angular velocity of gyro.
As shown in figure 4, resonant frequency and laser frequency clockwise and anticlockwise when giving resonance type optical gyroscope rotation
Rate relation schematic diagram.Laser frequency all-the-time stable is in the resonant frequency of light beam counterclockwise, and light beam is humorous clockwise and anticlockwise
Vibration frequency difference is the turn signal of resonance type optical gyroscope.
As shown in figure 5, being a kind of real-time case of the resonance type optical gyroscope based on quadrature demodulation, the present invention is used and is partly led
Body tunable laser is as tunable laser, and Y-branch makees optical splitters, and optical phase modulator is as modulator, light
Electric explorer is write in the enterprising line code of development platform based on FPGA as photoelectric conversion module and realizes modulating and demodulating signal mould
Block, signal processing module, feedback lock module, using digital multimeter or PC as data logger.
Claims (8)
1. a kind of detecting system of the resonance type optical gyroscope based on quadrature demodulation, which is characterized in that it includes tunable laser
Device, optical isolator, optical splitters, first phase modulator, second phase modulator, optical resonator, opto-electronic conversion mould
The optical system and believed by the modulation /demodulation module of signal, feedback lock module, the first signal processing module, second that block is formed
The signal processing system that number processing module is formed；
Tunable laser, optical isolator and optical splitters are sequentially connected, and optical splitters are modulated respectively with first phase
Device, second phase modulator are connected, and first phase modulator is connected with optical resonator, second phase modulator and optical resonance
Chamber is connected, and optical resonator, photoelectric conversion module and modulating and demodulating signal module are sequentially connected, modulating and demodulating signal module and the
One phase modulation module is connected, and modulating and demodulating signal module is connected with second phase modulation module, modulating and demodulating signal module,
One signal processing module, feedback lock module and tunable laser are sequentially connected, modulating and demodulating signal module and second signal
Processing module is connected.
2. the detecting system of the resonance type optical gyroscope based on quadrature demodulation as described in claim 1, it is characterised in that described
Optical resonator be optical fibre device or integrated optical device.
3. the detecting system of the resonance type optical gyroscope based on quadrature demodulation as claimed in claim 1 or 2, it is characterised in that institute
The structure for the optical resonator stated is transmitted light resonator or reflective optic resonator.
4. a kind of detection method using detecting system described in claim 1, which is characterized in that include the following steps：
(1) phase-modulation：The laser sent out by tunable laser is divided into work(after optical isolator, by optical splitters
Two identical beams of rate, then respectively by first phase modulator and second phase modulators modulate, specifically：Signal modulation solution
Mode transfer block generates carrier suppressed modulation signal U1(t) and U2(t) it respectively drives first phase modulator and second phase modulator is complete
Into phase-modulation, phase-modulation and carrier wave this completes the light counterclockwise and clockwise to entering optical resonator press down
System；
(2) quadrature demodulation of signal：By the two-beam of phase-modulation, optical resonator is inputted, is formed counterclockwise and clockwise
Two resonance light beams, this two-beam respectively enters photodetector and is converted into electric signal, and modulating and demodulating signal module generates same
The electric signal that frequency orthogonal signalling are respectively converted into light beam clockwise is demodulated, and generates demodulated signal U3(t) and U4(t)；Signal
The electric signal that the generation of modulation /demodulation module is respectively converted into light beam counterclockwise with frequency orthogonal signalling is demodulated, and generates demodulation letter
Number U5(t) and U6(t)；
(3) signal processing of quadrature demodulated signal：In second signal processing module, clockwise two-way quadrature demodulation letter
Number U3(t) and U4(t), respectively square after be added, then open radical sign and obtain non-negative even function signal U7(t), according to it is therein all the way
The positive negativity of quadrature demodulated signal is come to U7(t) it is overturn, finally obtains odd function signal U8(t)；In the first signal processing mould
In block, anticlockwise two-way quadrature demodulated signal U5(t) and U6(t), respectively square after be added, then open radical sign obtain it is non-
Negative even function signal U9(t), according to the positive negativity of quadrature demodulated signal all the way therein come to U9(t) it is overturn, is finally obtained
Odd function signal U10(t)；
(4) gyro signal exports：Inverse time needle path signal is transmitted to instead after the processing of the first signal processing module as error signal
Locking module is presented, feedback lock module carries out it feedback control tunable laser after ratio and integral operation processing；Up time
Needle path signal after the processing of second signal processing module, as resonance type optical gyroscope signal, is exported to data logger.
5. a kind of detecting system of the resonance type optical gyroscope based on quadrature demodulation, which is characterized in that it includes tunable laser
Device, optical isolator, optical splitters, first phase modulator, second phase modulator, third phase modulator, optics are humorous
Shake chamber, photoelectric conversion module form optical system and the modulation /demodulation module, feedback lock module, the first signal by signal
The signal processing system that processing module, second signal processing module, servo shift frequency module are formed；
Tunable laser, optical isolator and optical splitters are sequentially connected, and optical splitters are modulated respectively with first phase
Device, second phase modulator are connected, and first phase modulator, third phase modulator and optical resonator are sequentially connected, and second
Phase-modulator is connected with optical resonator, and optical resonator, photoelectric conversion module and modulating and demodulating signal module are sequentially connected,
Modulating and demodulating signal module is connected with first phase modulator, and modulating and demodulating signal module is connected with second phase modulator, letter
Number modulation /demodulation module, the first signal processing module, feedback lock module and tunable laser are sequentially connected, signal modulation solution
Mode transfer block, second signal processing module, servo shift frequency module and third phase modulator are sequentially connected.
6. the detecting system of the resonance type optical gyroscope based on quadrature demodulation as claimed in claim 5, it is characterised in that described
Optical resonator be optical fibre device or integrated optical device.
7. the detecting system of the resonance type optical gyroscope based on quadrature demodulation as claimed in claim 5, it is characterised in that described
Optical resonator structure be transmitted light resonator or reflective optic resonator.
8. a kind of detection method using detecting system described in claim 4, which is characterized in that include the following steps：
(1) phase-modulation：The laser sent out by tunable laser is divided into work(after optical isolator, by optical splitters
Two identical beams of rate, then respectively by first phase modulator and second phase modulators modulate, specifically：Signal modulation solution
Mode transfer block generates carrier suppressed modulation signal U1(t) and U2(t) it respectively drives first phase modulator and second phase modulator is complete
Into phase-modulation, phase-modulation and carrier wave this completes the light counterclockwise and clockwise to entering optical resonator press down
System；
(2) quadrature demodulation of signal：By the two-beam of phase-modulation, optical resonator is inputted, is formed counterclockwise and clockwise
Two resonance light beams, this two-beam respectively enters photodetector and is converted into electric signal；Modulating and demodulating signal module generates same
The electric signal that frequency orthogonal signalling are respectively converted into light beam clockwise is demodulated, and generates demodulated signal U3(t) and U4(t)；Signal
The electric signal that the generation of modulation /demodulation module is respectively converted into light beam counterclockwise with frequency orthogonal signalling is demodulated, and generates demodulation letter
Number U5(t) and U6(t)；
(3) signal processing of quadrature demodulated signal：In second signal processing module, clockwise two-way quadrature demodulation letter
Number U3(t) and U4(t), respectively square after be added, then open radical sign and obtain non-negative even function signal U7(t), according to it is therein all the way
The positive negativity of quadrature demodulated signal is come to U7(t) it is overturn, finally obtains odd function signal U8(t)；In the first signal processing mould
In block, anticlockwise two-way quadrature demodulated signal U5(t) and U6(t), respectively square after be added, then open radical sign obtain it is non-
Negative even function signal U9(t), according to the positive negativity of quadrature demodulated signal all the way therein come to U9(t) it is overturn, is finally obtained
Odd function signal U10(t)。
(4) gyro signal exports：Inverse time needle path signal is transmitted to feedback lock after the first signal processing module as error signal
Cover half block, feedback lock module carry out it feedback control tunable laser after ratio and integral operation processing, up time needle path
Signal after second signal processing module, is transmitted to servo shift frequency module, finally acts on third phase modulator so that suitable
When needle path be also operated on resonant frequency point, shift frequency amount is the rotation output signal of gyro.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810119508.1A CN108168537B (en) | 2018-02-06 | 2018-02-06 | Detection system and method of resonant optical gyroscope based on orthogonal demodulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810119508.1A CN108168537B (en) | 2018-02-06 | 2018-02-06 | Detection system and method of resonant optical gyroscope based on orthogonal demodulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108168537A true CN108168537A (en) | 2018-06-15 |
| CN108168537B CN108168537B (en) | 2020-04-24 |
Family
ID=62513421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810119508.1A Active CN108168537B (en) | 2018-02-06 | 2018-02-06 | Detection system and method of resonant optical gyroscope based on orthogonal demodulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108168537B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360997A (en) * | 2019-06-28 | 2019-10-22 | 浙江大学 | A kind of detection system and method for time-multiplexed resonance type optical gyroscope |
| CN110360998A (en) * | 2019-06-28 | 2019-10-22 | 浙江大学 | A kind of detection system and method for the resonance type optical gyroscope based on pulse optical detection |
| CN111238464A (en) * | 2020-01-19 | 2020-06-05 | 浙江大学 | Detection system and method of resonant optical gyroscope based on combination of reciprocity modulation and time division switching |
| CN112697124A (en) * | 2020-12-22 | 2021-04-23 | 浙江大学 | Square wave quadrature demodulation implementation method and device of closed-loop resonant optical gyroscope |
| CN113465630A (en) * | 2021-07-02 | 2021-10-01 | 浙江大学 | Optical resonant cavity free spectral line width online test system and method based on coherent demodulation |
| CN113587914A (en) * | 2021-07-28 | 2021-11-02 | 北京航空航天大学 | Frequency spectrum separation method for restraining back reflection error of resonant integrated optical gyroscope |
| CN114280321A (en) * | 2021-12-24 | 2022-04-05 | 浙江大学 | Low-coherent-light three-piece hybrid integrated angular velocity detection system and method |
| CN114459457A (en) * | 2022-02-10 | 2022-05-10 | 浙江大学 | Resonant fiber-optic gyroscope system and method based on reciprocal modulation secondary demodulation |
| CN115112113A (en) * | 2022-07-18 | 2022-09-27 | 哈尔滨工业大学 | Device and method for compensating relative intensity noise error of resonant fiber-optic gyroscope |
| US11656081B2 (en) * | 2019-10-18 | 2023-05-23 | Anello Photonics, Inc. | Integrated photonics optical gyroscopes optimized for autonomous terrestrial and aerial vehicles |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464151A (en) * | 2009-01-05 | 2009-06-24 | 浙江大学 | Detection apparatus and method for miniature resonance type optical gyroscope with double-signal combined modulation |
| CN102331258A (en) * | 2011-07-12 | 2012-01-25 | 浙江大学 | Two-path loop-locked resonant mode optical gyro |
| CN102519445A (en) * | 2011-12-07 | 2012-06-27 | 浙江大学 | Resonance optic gyro based on digital phase oblique wave frequency shift technology |
| CN102636187A (en) * | 2012-04-19 | 2012-08-15 | 浙江大学 | Highly reciprocal resonant mode fiber-optic gyroscope detection device and method |
| CN103115628A (en) * | 2013-01-23 | 2013-05-22 | 北京航空航天大学 | Testing device and method for resonant mode optical gyroscope scale factor |
| CN104006809A (en) * | 2013-02-22 | 2014-08-27 | 霍尼韦尔国际公司 | Method and system for detecting optical ring resonator resonance frequencies and free spectral range |
| US20160003619A1 (en) * | 2014-07-07 | 2016-01-07 | Honeywell International Inc. | Resonator fiber optic gyroscope employing common cavity length modulation along with high bandwidth laser stabilization |
-
2018
- 2018-02-06 CN CN201810119508.1A patent/CN108168537B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464151A (en) * | 2009-01-05 | 2009-06-24 | 浙江大学 | Detection apparatus and method for miniature resonance type optical gyroscope with double-signal combined modulation |
| CN102331258A (en) * | 2011-07-12 | 2012-01-25 | 浙江大学 | Two-path loop-locked resonant mode optical gyro |
| CN102519445A (en) * | 2011-12-07 | 2012-06-27 | 浙江大学 | Resonance optic gyro based on digital phase oblique wave frequency shift technology |
| CN102636187A (en) * | 2012-04-19 | 2012-08-15 | 浙江大学 | Highly reciprocal resonant mode fiber-optic gyroscope detection device and method |
| CN103115628A (en) * | 2013-01-23 | 2013-05-22 | 北京航空航天大学 | Testing device and method for resonant mode optical gyroscope scale factor |
| CN104006809A (en) * | 2013-02-22 | 2014-08-27 | 霍尼韦尔国际公司 | Method and system for detecting optical ring resonator resonance frequencies and free spectral range |
| US20160003619A1 (en) * | 2014-07-07 | 2016-01-07 | Honeywell International Inc. | Resonator fiber optic gyroscope employing common cavity length modulation along with high bandwidth laser stabilization |
Non-Patent Citations (2)
| Title |
|---|
| CHUANBIN WU,ET AL.: "Synchronous in-phase and quadrature demodulation technique for resonant micro-optic gyroscope", 《APPLIED OPTICS》 * |
| 郭丽君等: "谐振式集成光学陀螺解调特性分析", 《中国光学》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360998A (en) * | 2019-06-28 | 2019-10-22 | 浙江大学 | A kind of detection system and method for the resonance type optical gyroscope based on pulse optical detection |
| CN110360998B (en) * | 2019-06-28 | 2021-05-18 | 浙江大学 | Detection system and method of resonant optical gyroscope based on pulse light detection |
| CN110360997A (en) * | 2019-06-28 | 2019-10-22 | 浙江大学 | A kind of detection system and method for time-multiplexed resonance type optical gyroscope |
| US11656081B2 (en) * | 2019-10-18 | 2023-05-23 | Anello Photonics, Inc. | Integrated photonics optical gyroscopes optimized for autonomous terrestrial and aerial vehicles |
| CN111238464A (en) * | 2020-01-19 | 2020-06-05 | 浙江大学 | Detection system and method of resonant optical gyroscope based on combination of reciprocity modulation and time division switching |
| CN111238464B (en) * | 2020-01-19 | 2021-11-09 | 浙江大学 | Detection method of resonant optical gyroscope based on reciprocity modulation and time division switching |
| CN112697124A (en) * | 2020-12-22 | 2021-04-23 | 浙江大学 | Square wave quadrature demodulation implementation method and device of closed-loop resonant optical gyroscope |
| CN112697124B (en) * | 2020-12-22 | 2022-04-26 | 浙江大学 | Square wave quadrature demodulation implementation method and device of closed-loop resonant optical gyroscope |
| CN113465630A (en) * | 2021-07-02 | 2021-10-01 | 浙江大学 | Optical resonant cavity free spectral line width online test system and method based on coherent demodulation |
| CN113465630B (en) * | 2021-07-02 | 2023-09-22 | 浙江大学 | Optical resonant cavity free spectral line width online test system and method based on coherent demodulation |
| CN113587914B (en) * | 2021-07-28 | 2023-05-16 | 北京航空航天大学 | Spectrum separation method for inhibiting back reflection error of resonant integrated optical gyroscope |
| CN113587914A (en) * | 2021-07-28 | 2021-11-02 | 北京航空航天大学 | Frequency spectrum separation method for restraining back reflection error of resonant integrated optical gyroscope |
| CN114280321A (en) * | 2021-12-24 | 2022-04-05 | 浙江大学 | Low-coherent-light three-piece hybrid integrated angular velocity detection system and method |
| CN114459457A (en) * | 2022-02-10 | 2022-05-10 | 浙江大学 | Resonant fiber-optic gyroscope system and method based on reciprocal modulation secondary demodulation |
| CN115112113B (en) * | 2022-07-18 | 2023-03-03 | 哈尔滨工业大学 | Device and method for compensating relative intensity noise error of resonant fiber-optic gyroscope |
| CN115112113A (en) * | 2022-07-18 | 2022-09-27 | 哈尔滨工业大学 | Device and method for compensating relative intensity noise error of resonant fiber-optic gyroscope |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108168537B (en) | 2020-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108168537A (en) | The detecting system and method for resonance type optical gyroscope based on quadrature demodulation | |
| CN110360997A (en) | A kind of detection system and method for time-multiplexed resonance type optical gyroscope | |
| CN110360998A (en) | A kind of detection system and method for the resonance type optical gyroscope based on pulse optical detection | |
| CN102636187B (en) | Highly reciprocal resonant mode fiber-optic gyroscope detection device and method | |
| JP6404656B2 (en) | Method and apparatus for tracking / rocking the free spectral range of a resonator and its application to a resonator fiber optic gyroscope | |
| US5420684A (en) | Resonant interferometer fiber optic gyroscope | |
| CN103411601B (en) | A kind of double; two interferometric fiber optic gyroscope modulation-demo-demodulation methods realizing light path difference | |
| CN111238464B (en) | Detection method of resonant optical gyroscope based on reciprocity modulation and time division switching | |
| CN103438882B (en) | A kind of optical fibre gyro of low scale factor error | |
| CN102331258B (en) | Two-path loop-locked resonant mode optical gyro | |
| JP2007132941A (en) | Asynchronous demodulation in optical fiber gyroscope | |
| US7777890B2 (en) | Method and power-assisted optic-fiber measuring device and gyro | |
| CN103712615B (en) | The single channel close loop resonance formula optical gyroscope of optical power feedback | |
| CN114993281A (en) | Full-digital closed-loop angular velocity detection system and method based on low coherent light | |
| CN103267522B (en) | The two-way frequency locking switching method of microwave gyroscope irreplaceable error is carried for eliminating light | |
| US4717256A (en) | Fiber optic rate sensor | |
| Sanders et al. | Improvements of compact resonator fiber optic gyroscopes | |
| CN106247930A (en) | The residual compensation method of phase carrier formula laser interferometer closed loop demodulating algorithm | |
| CN101793997B (en) | Ring resonator | |
| CN114280321B (en) | Low-coherent-light three-piece hybrid integrated angular velocity detection system and method | |
| CN102519446A (en) | Resonant optical gyroscope based on fast-speed high-precision frequency tracking and locking technology | |
| CN104296740A (en) | Fiber-optic gyroscope main control panel crystal oscillator selecting method based on anti-fuse FPGA | |
| Babu et al. | Digital signal processing scheme for open loop and closed loop IFOG using MATLAB/SIMULINK | |
| Li et al. | IFOG Based on Rhombic Optical Path Difference Bias Configuration for High-Frequency Angular Vibration Measurement | |
| CN209764109U (en) | optical fiber gyroscope |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |