CN109186581A - It is a kind of that integrated optical fiber gyroscope is multiplexed without the microminiature of refrigeration light source based on 850nm - Google Patents
It is a kind of that integrated optical fiber gyroscope is multiplexed without the microminiature of refrigeration light source based on 850nm Download PDFInfo
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- 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
- G01C19/728—Assemblies for measuring along different axes, e.g. triads
Abstract
Integrated optical fiber gyroscope is multiplexed without the microminiature of refrigeration light source based on 850nm the invention discloses a kind of, is related to interference type optical fiber gyroscope technical field.The device includes optical transceiver module, sensing ring module and signal processing module, and optical transceiver module includes 850nm light source, photodetector, light source driving circuit and preceding electric discharge road；Sensing ring module includes three Y waveguides and three fiber optic loops；Signal processing module includes A/D converter, field programmable gate array, three D/A converters and three driving circuits.The work of each axis of optical fibre gyro uses time division modulation mode.The transition time of three fiber optic loops and the working time of three axis are calculated separately according to the length of three axis fiber optic loops first；Then the working sequence for determining three fiber optic loops guarantees that the axis for there was only work at present in synchronization works in closed-loop control channel, other two axis works in depth modulation channel.It is light weight of the present invention, small in size, low in energy consumption, guarantee working shaft precision, axis minimizes the annoyance level of signal.
Description
Technical field
The present invention relates to interference type optical fiber gyroscope technical field, it is specifically a kind of based on 850nm without refrigeration light source it is small
Type is multiplexed integrated optical fiber gyroscope.
Background technique
Interference type optical fiber gyroscope is a kind of highly reliable, high-precision inertia angular-rate sensor, by fiber optic loop sensitivity to
Angular velocity, generation non-reciprocal phase is poor, has many advantages, such as big dynamic range, movement-less part and shock resistance, can be widely applied
It is the core devices for constituting inertia system in the attitude angle and angular speed of measurement carrier.
Optical fibre gyro is because its reliability is high, precision is high, advantages small in size and light-weight etc. have well in space tasks
Using and feasibility.As satellite system develops towards high-precision, small-sized and low-power consumption direction, to inertial measurement system
Small-sized and high integration requirement is proposed, and then sum aggregate small in size, light-weight, low in energy consumption is proposed to used gyro
At spending high requirement, in the case where also there is a big difference for the precision of micromechanical gyro (MEMS) and environmental suitability, optical fiber top
The micromation of spiral shell is inevitable choice.
In the practice of optical fibre gyro micromation, there are the following problems:
(1) it is miniaturized and reduces the performance indicator of optical fibre gyro.
(2) light source driving circuit includes constant current and temperature control, and temperature controlled light source scheme is complicated, and mainly temperature control scheme increases function
Consumption, complexity and cost.
(3) device integration is low, loosely organized, not compact, and reliability is low, while miniaturized design brings one to assembly
Fixed complexity.
Summary of the invention
For problem described above, the invention proposes a kind of microminiature multiplexing based on 850nm without refrigeration light source is integrated
Optical fibre gyro；By integrated, modularization and microminaturization, the weight, volume and power consumption of optical fibre gyro are effectively reduced, is met
Requirement of the microsatellite to optical fiber gyroscope precision, reliability, small size, low-power consumption and low cost.
The microminiature is multiplexed integrated optical fiber gyroscope, including optical transceiver module, sensing ring module and signal processing module,
Using TDM scheme, in each operation time, only one axis, which works normally, is in closed-loop control channel, carries out square wave
Modulation and staircase waveform closed loop feedback, other two axis are in depth modulation channel, are not operate at sensitizing range；Optical transceiver module uses
Light-operated principle forms closed-loop control system using the direct current signal of detector as feedback quantity, designs light source driving circuit.
Optical transceiver module as the module for shining and detecting optical signal, visit by 850nm light source, photoelectricity including integrating
Survey device, light source driving circuit and preceding electric discharge road；Light source and photodetector are separately connected light source driving circuit and preceding electric discharge road, mention
For optical signal and detection；Light source driving circuit one end is connected with light source provides constant current, and the other end connects photodetector,
The optical power signals DC component for obtaining detector adjusts the driving output of itself as feedback quantity；Photodetector connects simultaneously
Before put circuit on one side, using the AC compounent of detector as gyro signal, the other end and external signal on preceding electric discharge road handle mould
Block connection；
Pass through coupler connects sensing ring module to light source simultaneously with photodetector；Sensing ring module includes three Y waveguides
With three fiber optic loops；Three fiber optic loops include X- axis fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop；Each fiber optic loop connects respectively
Connect a Y waveguide；The respective driving circuit in connection signal processing module of three Y waveguides simultaneously；Three fiber optic loops are chosen
Central wavelength is the thin optic fibre of 850nm.
Signal processing module is by A/D converter (analog/digital converter), field programmable gate array (FPGA), and three
D/A (digital/analog converter) converter and three driving circuits integrate.
A/D converter draws a port and is used to be connected with the preceding electric discharge road of optical transceiver module, the connection of another port
Integrated FPGA, FPGA have been internally integrated closed-loop control channel, depth modulation channel and three it is double select that digital switch combines when
Sequence control channel.
Three pairs are selected digital switch to select Digital Logic setting, are connected one by one with three D/A conversion modules respectively, each
D/A conversion module respectively corresponds to a driving circuit, and each driving circuit respectively connects a Y waveguide, and then respectively drives X- axis
Fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop；
The gyro signal that preceding electric discharge road will be detected passes to A/D conversion module, is transmitted to FPGA after being converted to digital signal,
FPGA selects digital switch within the different duty cycles by double, makes X- axis fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop point
It does not work in different channels, in different working conditions so as to time-sharing work；
The principle of time-sharing multiplex is as follows:
Firstly, calculating separately X- axis fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop according to the length of three axis fiber optic loops
Transition time；
The transition time of X- axis fiber optic loop are as follows:
LxFor the length of X- axis fiber optic loop；C is the light velocity in vacuum, and n is the refractive index of optical fiber；
The transition time of Y- axis fiber optic loop are as follows:LyFor the length of Y- axis fiber optic loop；
The transition time of Z- axis fiber optic loop are as follows:LzFor the length of Z- axis fiber optic loop；
Then, the working time of three axis is calculated using the transition time of three axis fiber optic loops；
The working time of X- axis fiber optic loop are as follows: Tx=nx×Δτx；nxFor the modulation number of X- axis fiber optic loop.
The working time of Y- axis fiber optic loop are as follows: Ty=ny×Δτy；nyFor the modulation number of Y- axis fiber optic loop.
The working time of Z- axis fiber optic loop are as follows: Tz=nz×Δτz；nzFor the modulation number of Z- axis fiber optic loop.
Finally, determining X- axis fiber optic loop, the working sequence of Y- axis fiber optic loop and Z- axis fiber optic loop makes not according to working sequence
Same axis works in different channels, guarantees in closed-loop control channel, in addition the axis for there was only work at present in synchronization works
Two axis work are in depth modulation channel.
The present invention is used without refrigeration light source, is driven by the light source of analog closed-loop optical power control, and temperature control circuit is not necessarily to, permanent
The principle for flowing driving is as follows:
Firstly, light source driving circuit filtering obtains the DC component of detector output signal, transmission function Z-1, after feedback
DC component amplify to obtain K2, and compare to form error signal with given value PP；Amplification filtering and transmission function obtain Ka·
Z-1；Then output current signal I is obtained into K by voltage sampling1Feedback forms error signalI, and and Ka·Z-1It is integrated
Operation forms constant current signal KPConstant current as light source drives.
The present invention has the advantages that
1) a kind of that integrated optical fiber gyroscope is multiplexed without the microminiature of refrigeration light source based on 850nm, by three number of axle word closed-loop optical fibers
Gyroscope modules are divided into three optical transceiver module, signal processing module and sensing ring module modules；With light weight, volume and
The advantages of low in energy consumption etc..
2) a kind of that integrated optical fiber gyroscope is multiplexed without the microminiature of refrigeration light source based on 850nm, use wavelength for the light of 850nm
Source scheme can guarantee optical fiber gyroscope precision on the basis of reducing gyro volume and power consumption etc. again.
3) a kind of that integrated optical fiber gyroscope is multiplexed without the microminiature of refrigeration light source based on 850nm, using analog closed-loop control
Light source driving circuit, can be to avoid the design of a large amount of temperature control circuit, while the driving circuit relative to digital newspaper industry, knot
Structure is simple, saves the electronic components such as A/D and D/A converter.
4) a kind of that integrated optical fiber gyroscope, using time-division multiplex technology, three are multiplexed without the microminiature of refrigeration light source based on 850nm
A axis shares an optical transceiver module, a coupler and a signal processing module, gyro volume greatly reduces, structure more
Compact, component number reduction.
5) a kind of to be multiplexed integrated optical fiber gyroscope without the microminiature of refrigeration light source based on 850nm, FPGA is integrated with closed-loop control
Channel and depth modulation channel and three are double to select digital switch.By three switch can guarantee any time only one
Axis is in closed-loop control channel, other two axis is in depth modulation channel.While guaranteeing working shaft precision, pass through depth
Modulation channels minimize other two axis to the annoyance level of signal.
Detailed description of the invention
Fig. 1 is a kind of entire block diagram of the microminiature multiplexing integrated optical fiber gyroscope based on 850nm without refrigeration light source of the present invention；
Fig. 2, which is that the present invention is based on 850nm, is multiplexed the time-multiplexed work of integrated optical fiber gyroscope without the microminiature of refrigeration light source
Timing diagram；
Fig. 3, which is that the present invention is based on 850nm, is multiplexed integrated signal of fiber optical gyroscope processing module without the microminiature of refrigeration light source
Integrated figure；
Fig. 4 is the light source driving principle of the microminiature multiplexing integrated optical fiber gyroscope the present invention is based on 850nm without refrigeration light source
Figure.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
A kind of Microminiature time division Multiplexing module optical fibre gyro based on 850nm without refrigeration light source of the present invention, such as Fig. 1 institute
Show, use modularization and integrated technology, is divided by module and sub-module is integrated.Modular technology is embodied in: by optical fibre gyro
It is divided into three modules: optical transceiver module, sensing ring module and signal processing module.It is each it is modular integrated for volume it is small one
A little module, especially signal processing module integrate more multi-functional detection control technology；Modular optical fibre gyro
In the case where guaranteeing that optical fibre gyro is compact-sized, gyro assembly also can be convenient.
It is by integrated technology that the optical transceiver module of optical fibre gyro and signal processing module progress is highly integrated；Integrated skill
Art is embodied in: light source, detector, light source driving circuit and preceding electric discharge road are integrated into optical transceiver module；So that circuit noise drops
It is low and convenient for assembly；Y waveguide and fiber optic loop constitute sensing ring module；By A/D conversion module, FPGA, D/A conversion module and driving
Circuit integration is signal processing module；Wherein FPGA has been internally integrated closed-loop control channel and depth modulation channel and three
Double timing control channels for selecting digital switch to form.
In the optical transceiver module, light source uses wavelength for the SLD light source of 850nm, the advantage is that 850nm light source is managed
It is higher relative to common 1550nm and 1310nm light source by precision, it allows for guaranteeing optical fibre gyro miniaturization and integrating in this way
It can guarantee that the precision of optical fibre gyro is unaffected again on the basis of change；It reduces power consumption volume and saves cost.
Light source and photodetector are separately connected light source driving circuit and preceding electric discharge road, provide optical signal and detection；Light source
Driving circuit one end is connected with light source provides constant current, and the other end connects photodetector, and light source driving circuit, which obtains, to be visited
The optical power signals DC component for surveying device adjusts the driving output of itself as feedback quantity；Electric discharge before photodetector connects simultaneously
Road one end obtains the AC compounent of detector as gyro signal, and the other end and external signal processing module on preceding electric discharge road connect
It connects, the signal detected is handled in signal processing module.
Pass through coupler connects sensing ring module to light source simultaneously with detector；Sensing ring module includes three Y waveguides and three
A fiber optic loop；Three fiber optic loops include X- axis fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop；Each fiber optic loop is separately connected one
A Y waveguide；The respective driving circuit in connection signal processing module of three Y waveguides simultaneously.
Signal processing module is by A/D conversion module, integrated FPGA, three D/A conversion modules and three driving circuit collection
At together.A/D conversion module draws a port and is used to be connected with the preceding electric discharge road of optical transceiver module, another port connects
Integrated FPGA is met, FPGA has been internally integrated closed-loop control channel, and depth modulation channel and three pairs select digital switch to combine
Timing control channel.Three pairs are selected digital switch to select Digital Logic setting, are connected one by one with three D/A conversion modules respectively
It connects, each D/A conversion module respectively corresponds to a driving circuit, and each driving circuit respectively connects a Y waveguide, and then drives respectively
Dynamic X- axis fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop；The effect of switch is worked respectively for controlling three axis at which
Channel.
The gyro signal that preceding electric discharge road will be detected passes to A/D conversion module, is transmitted to FPGA after being converted to digital signal,
FPGA is arranged three pairs by Digital Logic and selects digital switch within the different duty cycles, makes X- axis fiber optic loop, Y- axis optical fiber
Ring and Z- axis fiber optic loop are worked respectively in different channels, and three axis is made to be in different working conditions so as to three axis time-sharing works；
It is as shown in Figure 3 that signal of fiber optical gyroscope processing module integrates block diagram.Channel 1 in Fig. 3 is closed-loop control channel, channel
2 be depth feedback channel, and channel 3 is working sequence control logic.In channel 1, be divided into the first closed-loop control 1. with the second closed loop
Control is 2..1. realizing signal demodulation process, and (its modulating frequency is the intrinsic frequency of fiber optic loop to Y waveguide progress square-wave frequency modulation
The 1/2 of rate), modulation error phase feedback.Square-wave frequency modulation and staircase waveform feedback signal are added on Y waveguide simultaneously realizes some top
The closed-loop control of spiral shell axial direction is 1..2. closed loop, which carries out 2 π to signal, resets detection, missed caused by half-wave voltage is unstable for realizing
Difference, to realize the second closed-loop control.Channel in Fig. 3, FPGA generate square wave and carry out depth tune to two axis in the channel
Make so that on Y waveguide generation ± π phase-modulation.The purpose in depth modulation channel is to export idle two axis
Optical power is minimized, and is reduced axial interference of the two axis to working condition, is improved the precision of gyro.
Optical fibre gyro Time Division Multiplexing Fabric, three axis share at an optical transceiver module, a coupler and a signal
Manage module.The use of photoelectric component can be effectively reduced, so that structure is more compact, reduces the weight of gyro to the full extent
Amount and volume, while saving cost.In order to realize the time division multiplexing of three axis, need to carry out timesharing control to signal processing module
System.For this purpose, it is double to be internally integrated closed-loop control channel, depth modulation channel, working sequence control logic and three in FPGA
Digital switch S1, S2, S3 is selected to control three axis work respectively in different channels, the flowchart of the working sequence of three axis such as Fig. 2
It is shown,
Firstly, calculating separately X- axis fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop according to the length of three axis fiber optic loops
Transition time；
The transition time of X- axis fiber optic loop are as follows:
LxFor the length of X- axis fiber optic loop；C is the light velocity in vacuum, and n is the refractive index of optical fiber；
The transition time of Y- axis fiber optic loop are as follows:LyFor the length of Y- axis fiber optic loop；
The transition time of Z- axis fiber optic loop are as follows:LzFor the length of Z- axis fiber optic loop；
Then, the working time of three axis is calculated using the transition time of three axis fiber optic loops；
The working time of X- axis fiber optic loop are as follows: Tx=nx×Δτx；nxFor the modulation number of X- axis fiber optic loop.
The working time of Y- axis fiber optic loop are as follows: Ty=ny×Δτy；nyFor the modulation number of Y- axis fiber optic loop.
The working time of Z- axis fiber optic loop are as follows: Tz=nz×Δτz；nzFor the modulation number of Z- axis fiber optic loop.
Finally, determining X- axis fiber optic loop, the working sequence of Y- axis fiber optic loop and Z- axis fiber optic loop makes not according to working sequence
With axis work in different channels, guarantee there was only the axis of work at present in closed-loop control channel in synchronization, other two
Axis works in depth modulation channel.
The present invention passes through mould using 850nm light source without solutions for refrigeration to further realize the microminaturization of optical fibre gyro
The light source driving of quasi- closed loop optical power control, is not necessarily to special temperature control circuit, and no solutions for refrigeration can be to avoid complicated light source temperature
Control circuit, it is only necessary to by the signal cut-off flow component feedback of detector to the input terminal of light source driving circuit, then pass through amplification
It filters with integral operation and controls the driving current of light source, and then guarantee the constant driving current of light source.Caused by temperature change
The variation of light source optical power finally its optical power can be made to tend towards stability by the control mode of this closed loop.Constant current driving
Principle as shown in figure 4, as follows:
First feedback control loop is the DC component (i.e. negative bias) by obtaining detector output signal, cut-off flow component side
Method is filtering, transmission function Z-1, DC component reacted the size of light source output power, thus by the component after the feedback into
Row amplification K2It compares to form error signal with given value P afterwardsP, then amplification filtering, transmission function Ka·Z-1；In order to solve reality
The closed loop concussion problem that control circuit is likely to occur in the application of border, passes through voltage sampling K for output current signal I1Feedback is formed
Error signalI, then with Ka·Z-1Integral operation is carried out, constant current signal K is formedPConstant current as light source drives.
Light source drive scheme without refrigeration will form corresponding negative when temperature change causes light source output power to change
Feedback loop may finally be by light power stabilising in setting value.When temperature rises, source device output optical power decline can thus draw
Play the error signal of Output optical power and given PPGeneration, the adjustable driving circuit of error signal increases driving circuit
Greatly, final optical power can be stablized in given value again.Similarly, finally light power stabilising can also be made to set upon a drop in temperature
Value.
By the formula (1) of Sagnac effect, it can be clearly seen that, in the certain situation of the optical fiber ring length of optical fibre gyro
Under, the precision of the optical fibre gyro of 850nm scheme can be higher.
In formula, L is fiber lengths；R is the radius of fiber optic loop；For the mean wavelength of light source；Ω is angular velocity of rotation；
φSFor Sagnac phase shift.
In other words, in the case where guaranteeing optical fiber gyroscope precision, optical fiber used in the optical fibre gyro of 850nm light source package
The length of ring is smaller, so can further reduce the volume of optical fibre gyro by 850nm light source package, reduces weight.
For the present invention compared with traditional time-sharing multiplexing technology, traditional time-sharing multiplexing technology mainly uses electronic switch or light
The method of switch realizes the switching between axial direction, and this method noise is big, and low precision, volume is big, and the timesharing that the present invention designs is multiple
With making three axis optical fibre gyro common sparing photoelectric component；By the way that closed-loop control channel, depth feedback channel are arranged in FPGA,
Different axis work are controlled according to working sequence and realize time division modulation in different channels, and the work of three axis passes through integrated
Digital switch control inside FPGA, wherein the effect of depth feedback channel is to inhibit the signal cross-talk of between centers, makes current
Moment, idle axial work reduced noise and crosstalk in insensitive region.At each moment, in closed-loop control channel
Axial, square-wave frequency modulation, staircase waveform closed loop feedback, other two axially carries out depth modulation, makes its work in immunity region.Together
When, by driving light source to optical power analog signal closed loop feedback technique conceptual design constant-current drive circuit；By using 850nm
Wavelength simplifies gyroscope structure simultaneously without refrigeration light source package and can guarantee Gyro Precision.
Claims (5)
1. a kind of be multiplexed integrated optical fiber gyroscope without the microminiature of refrigeration light source based on 850nm, which is characterized in that receive and dispatch mould including light
Block, sensing ring module and signal processing module, using TDM scheme, in each operation time, only one axis is normal
Work is in closed-loop control channel, carries out square-wave frequency modulation and staircase waveform closed loop feedback, other two axis are in depth modulation channel,
It is not operate at sensitizing range；Optical transceiver module uses light-operated principle, forms closed loop using the direct current signal of detector as feedback quantity
Control system designs light source driving circuit；
Optical transceiver module as shine and detection optical signal module, including integrate 850nm light source, photodetection
Device, light source driving circuit and preceding electric discharge road；Light source and photodetector are separately connected light source driving circuit and preceding electric discharge road, provide
Optical signal and detection；Light source driving circuit one end is connected with light source provides constant current, and the other end connects photodetector, obtains
The optical power signals DC component of detector is taken to adjust the driving output of itself as feedback quantity；Before photodetector connects simultaneously
Circuit on one side is put, using the AC compounent of detector as gyro signal, the other end and external signal processing module on preceding electric discharge road
Connection；
Pass through coupler connects sensing ring module to light source simultaneously with photodetector；Sensing ring module includes three Y waveguides and three
A fiber optic loop；Three fiber optic loops include X- axis fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop；Each fiber optic loop is separately connected one
A Y waveguide；
Signal processing module is by A/D converter, and field programmable gate array, three D/A converters and three driving circuits are integrated
Together；
A/D converter draws a port and is used to be connected with the preceding electric discharge road of optical transceiver module, and the connection of another port is integrated
FPGA, FPGA have been internally integrated closed-loop control channel, depth modulation channel and three double timing controls for selecting digital switch to combine
Channel processed；
Three pairs are selected digital switch to be connected one by one with three D/A conversion modules respectively, and each D/A conversion module respectively corresponds to one
A driving circuit, each driving circuit respectively connect a Y waveguide, and then respectively drive X- axis fiber optic loop, Y- axis fiber optic loop and Z-
Axis fiber optic loop；
The gyro signal that preceding electric discharge road will be detected passes to A/D conversion module, is transmitted to FPGA, FPGA after being converted to digital signal
It selects digital switch within the different duty cycles by double, makes X- axis fiber optic loop, Y- axis fiber optic loop and Z- axis fiber optic loop distinguish work
Make in different channels, in different working conditions so as to time-sharing work.
2. a kind of microminiature multiplexing integrated optical fiber gyroscope based on 850nm without refrigeration light source as described in claim 1, feature
It is, the respective driving circuit in connection signal processing module of three Y waveguides；Three fiber optic loop Selection Center waves
The thin optic fibre of a length of 850nm.
3. a kind of microminiature multiplexing integrated optical fiber gyroscope based on 850nm without refrigeration light source as described in claim 1, feature
It is, described three pairs are selected digital switch to select Digital Logic setting.
4. a kind of microminiature multiplexing integrated optical fiber gyroscope based on 850nm without refrigeration light source as described in claim 1, feature
It is, the principle of the time-sharing work are as follows:
Firstly, calculate separately X- axis fiber optic loop according to the length of three axis fiber optic loops, Y- axis fiber optic loop and Z- axis fiber optic loop are crossed
The more time；
The transition time of X- axis fiber optic loop are as follows:
LxFor the length of X- axis fiber optic loop；C is the light velocity in vacuum, and n is the refractive index of optical fiber；
The transition time of Y- axis fiber optic loop are as follows:LyFor the length of Y- axis fiber optic loop；
The transition time of Z- axis fiber optic loop are as follows:LzFor the length of Z- axis fiber optic loop；
Then, the working time of three axis is calculated using the transition time of three axis fiber optic loops；
The working time of X- axis fiber optic loop are as follows: Tx=nx×Δτx；nxFor the modulation number of X- axis fiber optic loop；
The working time of Y- axis fiber optic loop are as follows: Ty=ny×Δτy；nyFor the modulation number of Y- axis fiber optic loop；
The working time of Z- axis fiber optic loop are as follows: Tz=nz×Δτz；nzFor the modulation number of Z- axis fiber optic loop；
Finally, determining X- axis fiber optic loop, the working sequence of Y- axis fiber optic loop and Z- axis fiber optic loop makes different according to working sequence
Axis works in different channels, guarantees that the axis for there was only work at present in synchronization works in closed-loop control channel, other two
Axis works in depth modulation channel.
5. a kind of microminiature multiplexing integrated optical fiber gyroscope based on 850nm without refrigeration light source as described in claim 1, feature
It is, using without refrigeration light source, is driven by the light source of analog closed-loop optical power control, be not necessarily to temperature control circuit, constant current driving
Principle is as follows:
Firstly, light source driving circuit filtering obtains the DC component of detector output signal, transmission function Z-1, straight after feedback
Flow component amplifies to obtain K2, and compare to form error signal with given value PP；Amplification filtering and transmission function obtain Ka·Z-1；So
Output current signal I is obtained into K by voltage sampling afterwards1Feedback forms error signalI, and and Ka·Z-1Integral operation is carried out,
Form constant current signal KPConstant current as light source drives.
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| CN116045949A (en) * | 2023-03-31 | 2023-05-02 | 中国船舶集团有限公司第七〇七研究所 | High-precision high-reliability optical fiber gyroscope and working method thereof |
| CN116147601A (en) * | 2023-04-23 | 2023-05-23 | 成都量子时频科技有限公司 | Integrated triaxial nuclear magnetic resonance atomic gyroscope system |
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| CN110319827B (en) * | 2019-07-17 | 2020-01-31 | 北京航空航天大学 | light source relative intensity noise self-adaptive suppression device for fiber optic gyroscope |
| CN110440786A (en) * | 2019-08-09 | 2019-11-12 | 浙江大学 | Single light source double-shaft optical fiber gyroscope instrument and its twin shaft electric signal demodulation method |
| CN114322977A (en) * | 2022-03-15 | 2022-04-12 | 西安中科华芯测控有限公司 | Small three-axis optical fiber gyroscope with multiplexing structure |
| CN114322977B (en) * | 2022-03-15 | 2022-06-21 | 西安中科华芯测控有限公司 | Small three-axis optical fiber gyroscope with multiplexing structure |
| CN114777756A (en) * | 2022-06-20 | 2022-07-22 | 中国船舶重工集团公司第七0七研究所 | Resonance gyroscope based on closed-loop control and control method thereof |
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| CN116147601A (en) * | 2023-04-23 | 2023-05-23 | 成都量子时频科技有限公司 | Integrated triaxial nuclear magnetic resonance atomic gyroscope system |
| CN117168429A (en) * | 2023-07-27 | 2023-12-05 | 北京自动化控制设备研究所 | Triaxial optical transceiver integrated assembly, optical path balance compensation method thereof and fiber optic gyroscope |
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