CN102506844A - Modulation-demodulation method of resonance type micro-optical gyro and device - Google Patents
Modulation-demodulation method of resonance type micro-optical gyro and device Download PDFInfo
- Publication number
- CN102506844A CN102506844A CN2011103356724A CN201110335672A CN102506844A CN 102506844 A CN102506844 A CN 102506844A CN 2011103356724 A CN2011103356724 A CN 2011103356724A CN 201110335672 A CN201110335672 A CN 201110335672A CN 102506844 A CN102506844 A CN 102506844A
- Authority
- CN
- China
- Prior art keywords
- digital
- signal
- modulation
- semiconductor laser
- ccw
- 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.)
- Pending
Links
Images
Landscapes
- Gyroscopes (AREA)
Abstract
The invention discloses a modulation-demodulation method of a resonance type micro-optical gyro and a device. The method adopts a rectangular wave current modulation and constant temperature control scheme. In term of signal modulation, the steps include first collecting simulation voltage signals output by a clockwise (CW) optical path detector and a counterclockwise (CCW) optical path detector in the resonance type micro-optical gyro; and then adjusting driving current of a semiconductor laser through a digital signal processor to enable the frequency of emitted light of the laser to be located at the resonance central frequency point of a CW path. At the moment, digital signals of a CCW path reflect the rotary angle speed of the optical gyro, and the closed loop control of the driving current of the semiconductor laser is achieved. The method has large modulation frequency difference, can easily achieve the largest point of the detection sensibility of the optical gyro, simultaneously can ensure high stability of power and frequency of a light source, reduce fluctuation noise and further improve the performance of the optical gyro.
Description
Technical field
The present invention relates to the optical gyroscope technical field, relate in particular to a kind of resonance type micro and learn gyro modulation-demo-demodulation method and device.
Background technology
At present; Advantages such as optical gyroscope is all solid state owing to its structure, dynamic range is big, start-up time is short, stability is high, the life-span is long obtain extensive studies and application; It is a kind of novel inertia angular-rate sensor that under microminaturization and high-precision requirement, grows up that resonance type micro is learned gyro, because its volume is little, in light weight and superior performance and receiving much concern.Obtain the angular velocity of rotation signal through detecting the difference on the frequency that transmits in opposite directions between the two-beam in the resonator cavity that the Sagnac effect causes; But because the Sagnac effect is a kind of very faint effect; Therefore resonance type micro is learned the characteristics that gyro output signal has very noisy, weak signal, is submerged in easily in the low-frequency disturbance and long term drift of fluctuation or signal deteching circuit of light source output intensity self; On the other hand, the corresponding light intensity variable quantity of same frequency offset also depends on the position of the corresponding tuning curve of laser original frequency.Therefore, the frequency offset that cause through the next directly measurement of the size gyro rotation of detection arrival detector light intensity is impossible basically, the suitable modulation-demo-demodulation method of necessary employing.
In the prior art; Resonance type micro is learned the gyro light channel structure and is adopted phase-modulator to carry out the phase place external modulation to realize the modulation to optical frequency mostly; But the technical scheme of phase-modulator factor such as intrinsic Modulation and Nonlinear, additional strength noise the performance of optical gyroscope is had a negative impact, reduced the performance of optical gyroscope.
Summary of the invention
The purpose of this invention is to provide a kind of resonance type micro and learn gyro modulation-demo-demodulation method and device; This method modulation frequency difference is big; Be easy to just can reach optical gyroscope detection sensitivity maximum point; Can guarantee simultaneously the high stability of light source power and frequency, reduce wave noise, further improve the optical gyroscope performance.
The objective of the invention is to realize that through following technical scheme a kind of resonance type micro learns the gyro modulation-demo-demodulation method, said method comprises step:
After the light intensity signal that resonance type micro is learned CW detector and the CCW detector output in the gyro converts electric signal to, respectively through prime amplifier amplify, analog to digital converter converts CW way word signal and CCW way word signal to;
Said CW way word signal is separated mediation PI controller digital processing after digital-to-analog conversion becomes analog quantity through digital filtering, signal; And after voltage amplification, get into totalizer first input end mouth; Produce square-wave signal inner processing of digital signal processor simultaneously, become analog quantity and after voltage amplification, get into totalizer second input port through digital-to-analog conversion through frequency division;
Said totalizer is carried out signal plus to two input signals, and converts the drive current end that current signal acts on the semiconductor laser in the said resonance type micro gyro to through voltage-controlled current source;
The size of regulating semiconductor laser drive current through digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road; Then this moment, CCW way word signal reflected the angular velocity of rotation of optical gyroscope, had realized the closed-loop control of semiconductor laser drive current.
Said size of regulating drive current through digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road, and then CCW way word signal reflected and specifically comprised the angular velocity of rotation of optical gyroscope this moment:
The size of regulating drive current through the PI controller in the digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road, and then the output square wave amplitude of CCW way word signal has reflected the angular velocity of rotation of optical gyroscope;
This CCW way word signal is exported as data after the digital processing of digital filtering, signal demodulation.
Said method also comprises:
In digital signal processor; Through the digital input amount of setting DA in the temperature conditioning unit is that constant makes and is output as constant voltage; Produce the temperature control end that steady current acts on said semiconductor laser through voltage amplification and voltage-to-current conversion, realize thermostatic control said semiconductor laser.
The embodiment of the invention also provides a kind of resonance type micro to learn the gyro modulation-demodulation device, and said device comprises sampling unit, modulation and closed-loop control unit and digital signal processor, wherein:
Said sampling unit, after being used for converting the light intensity signal that resonance type micro is learned CW detector and the CCW detector output of gyro to electric signal, respectively through prime amplifier amplify, analog to digital converter converts CW way word signal and CCW way word signal to;
Said modulation and closed-loop control unit; Be used for said CW way word signal is separated mediation PI controller digital processing after digital-to-analog conversion becomes analog quantity through digital filtering, signal; And after voltage amplification, get into totalizer first input end mouth; Produce square-wave signal inner processing of digital signal processor simultaneously, become analog quantity and after voltage amplification, get into totalizer second input port through digital-to-analog conversion through frequency division;
Said modulation and closed-loop control unit carry out signal plus through said totalizer to two input signals, and convert the drive current end that current signal acts on the semiconductor laser in the said resonance type micro gyro to through voltage-controlled current source;
The size that semiconductor laser drive current is regulated through digital signal processor in said modulation and closed-loop control unit makes the laser emitting light frequency be positioned at resonance paddy center, CW road; Then this moment, CCW way word signal reflected the angular velocity of rotation of optical gyroscope, had realized the closed-loop control of semiconductor laser drive current.
Said device also comprises temperature conditioning unit,
Said temperature conditioning unit converts the stationary digital amount to analog quantity through digital to analog converter through digital signal processor; Produce the temperature control end that steady current acts on said semiconductor laser through voltage amplification and voltage-to-current conversion, realize thermostatic control said semiconductor laser.
Technical scheme by the invention described above provides can find out, said method is at first gathered resonance type micro and learned CW way word signal and the CCW way word signal that CW detector and CCW detector in the gyro are exported; Size through digital signal processor adjusting semiconductor laser drive current makes the laser emitting light frequency be positioned at resonance paddy center, CW road again; Then this moment, CCW way word signal reflected the angular velocity of rotation of optical gyroscope, had realized the closed-loop control of semiconductor laser drive current.This method modulation frequency difference is big, is easy to just can reach optical gyroscope detection sensitivity maximum point, can guarantee the high stability of light source power and frequency simultaneously, has reduced wave noise, has further improved the optical gyroscope performance.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skill in the art; Under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 learns the schematic flow sheet of gyro modulation-demo-demodulation method for resonance type micro that the embodiment of the invention provides;
Fig. 2 is the structural representation of embodiment of the invention institute generator;
Fig. 3 is the structural representation of concrete scheme that the embodiment of the invention provides;
Modulation scheme schematic diagram in the instance that Fig. 4 enumerates for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills belong to protection scope of the present invention not making the every other embodiment that is obtained under the creative work prerequisite.
To combine accompanying drawing that the embodiment of the invention is done to describe in detail further below, and be illustrated in figure 1 as the schematic flow sheet that resonance type micro that the embodiment of the invention provides is learned the gyro modulation-demo-demodulation method, said method comprises:
Step 11: after the light intensity signal that resonance type micro is learned clockwise light path CW detector and counterclockwise light path CCW detector output in the gyro converts electric signal to, respectively through prime amplifier amplify, analog to digital converter converts CW way word signal and CCW way word signal to.
Step 12: said CW way word signal is separated mediation PI controller digital processing after digital-to-analog conversion becomes analog quantity through digital filtering, signal; And after voltage amplification, get into totalizer first input end mouth; Produce square-wave signal inner processing of digital signal processor simultaneously, become analog quantity and after voltage amplification, get into totalizer second input port through digital-to-analog conversion through frequency division.
Step 13: said totalizer is carried out signal plus to two input signals, and converts the drive current end that current signal acts on the semiconductor laser in the said resonance type micro gyro to through voltage-controlled current source.
Step 14: the size of regulating semiconductor laser drive current through digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road, has realized the closed-loop control of semiconductor laser drive current.
In this step; The size of regulating drive current through the PI controller in the digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road; Then this moment, CCW way word signal reflected the angular velocity of rotation of optical gyroscope, was exactly the angular velocity of rotation that the output square wave amplitude of CCW way word signal has reflected optical gyroscope specifically; Again this CCW way word signal is exported as data after the digital processing of digital filtering, signal demodulation.
In addition, said method can also realize the thermostatic control to said semiconductor laser, specifically:
In digital signal processor; Through the digital input amount of setting DA in the temperature conditioning unit is that constant makes and is output as constant voltage; Produce the temperature control end that steady current acts on said semiconductor laser through voltage amplification and voltage-to-current conversion, realize thermostatic control said semiconductor laser.
The embodiment of the invention also provides a kind of resonance type micro to learn the gyro modulation-demodulation device; Be illustrated in figure 2 as the structural representation of embodiment of the invention institute generator; Said device comprises sampling unit, modulation and closed-loop control unit and digital signal processor, wherein:
Said sampling unit; After the clockwise light path CW detector that is used for resonance type micro is learned gyro and the light intensity signal of light path CCW detector output counterclockwise convert electric signal to, respectively through prime amplifier amplify, analog to digital converter converts CW way word signal and CCW way word signal to;
Said modulation and closed-loop control unit; Be used for said CW way word signal is separated mediation PI controller digital processing after digital-to-analog conversion becomes analog quantity through digital filtering, signal; And after voltage amplification, get into totalizer first input end mouth; Produce square-wave signal inner processing of digital signal processor simultaneously, become analog quantity and after voltage amplification, get into totalizer second input port through digital-to-analog conversion through frequency division;
Said modulation and closed-loop control unit further are carried out signal plus through said totalizer to two input signals, and convert the drive current end that current signal acts on the semiconductor laser in the said resonance type micro gyro to through voltage-controlled current source;
The size that said modulation and closed-loop control unit further are regulated semiconductor laser drive current through digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road; Then this moment, CCW way word signal reflected the angular velocity of rotation of optical gyroscope, had realized the closed-loop control of semiconductor laser drive current.
In addition, said device also comprises temperature conditioning unit,
The digital input amount that said temperature conditioning unit is set DA in the temperature conditioning unit through digital signal processor is a constant; Make and be output as constant voltage; Produce the temperature control end that steady current acts on said semiconductor laser through voltage amplification and voltage-to-current conversion, realize thermostatic control said semiconductor laser.
Come scheme of the present invention is described with concrete instance below; Be illustrated in figure 3 as the structural representation of concrete scheme that the embodiment of the invention provides; Comprise among the figure: photoelectricity mixing module, sampling unit 1 and 2, digital signal processor, modulation and closed-loop control unit, temperature conditioning unit, wherein:
The photoelectricity mixing module is learned in the gyro at resonance type micro, comprises CW detector, CCW detector and semiconductor laser; Sampling unit 1 and 2 includes prime amplifier and analog to digital converter; Modulation and closed-loop control unit comprise digital to analog converter DA2, analogue amplifier 2, digital to analog converter DA3, analogue amplifier 3, totalizer and voltage-controlled current source 2, and concrete scheme is:
After converting the light intensity signal of CW detector and CCW detector output to electric signal, prime amplifier amplification, the analog to digital converter through sampling unit 1 and 2 converts CW way word signal and CCW way word signal to respectively;
Said CW way word signal is separated mediation PI controller digital processing after digital-to-analog conversion becomes analog quantity through digital filtering, signal; And after voltage amplification, get into totalizer first input end mouth 1; Produce square-wave signal inner processing of digital signal processor simultaneously, become analog quantity and after voltage amplification, get into totalizer second input port 2 through digital-to-analog conversion through frequency division;
Said totalizer is carried out signal plus to two input signals, and converts the drive current end that current signal acts on the semiconductor laser in the said resonance type micro gyro to through voltage-controlled current source 2;
The size of regulating semiconductor laser drive current through digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road; Then this moment, CCW way word signal reflected the angular velocity of rotation of optical gyroscope, had realized the closed-loop control of semiconductor laser drive current.Specifically, on the one hand,, semiconductor laser drive current also realized the frequency modulation (PFM) of semiconductor laser when being provided; On the other hand; The laser emitting light frequency is the resonance paddy center on the CW road not; PI controller in the digital signal processor will constantly be regulated drive current makes the laser emitting light frequency be positioned at resonance paddy center, CW road; What the CCW way word signal of this moment reflected is teetotum tarnsition velocity signal, after digital processings such as digital filtering, signal demodulation, exports as data.
Be illustrated in figure 4 as in the instance that the embodiment of the invention enumerates resonance type micro and learn gyro modulation scheme schematic diagram; Realized the ground growth of semiconductor laser output light frequency square waveform through apply one at the drive current end like the electric current frequency sweep square-wave signal shown under Fig. 4 left side, its principle is specifically:
When being positioned at resonance paddy left side, detector is output as the bigger square-wave signal of an amplitude, and the square wave amplitude has reflected the size at light frequency off-resonance paddy center; And when being positioned at resonance paddy right side, detector is exported the opposite square-wave signal of a phase place, and amplitude reflects the frequency difference size equally; When being positioned at resonance paddy center exactly, detector is exported a direct current signal, and the signal demodulation utilizes output square wave amplitude to realize the measurement to the frequency difference size just.
In native system; At first go out the frequency deviation size according to CW road light output square wave amplitude demodulation; Constantly regulate drive current through the PI controller then and make this road light frequency be positioned at resonance paddy center, the CCW road light output square wave amplitude of this moment has then reflected the teetotum tarnsition velocity.
This shows that owing in resonance type micro gyro, adopted semiconductor laser as light source, drive current and light source output frequency are linear in certain temperature range; Therefore through this modulation-demo-demodulation method; Make that the modulation frequency difference is big, be easy to just can reach optical gyroscope detection sensitivity maximum point, can guarantee the high stability of light source power and frequency simultaneously; Reduce wave noise, further improved the optical gyroscope performance.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. a resonance type micro is learned the gyro modulation-demo-demodulation method, it is characterized in that said method comprises step:
After the light intensity signal that resonance type micro is learned clockwise light path CW detector and counterclockwise light path CCW detector output in the gyro converts electric signal to, respectively through prime amplifier amplify, analog to digital converter converts CW way word signal and CCW way word signal to;
Said CW way word signal is separated mediation PI controller digital processing after digital-to-analog conversion becomes analog quantity through digital filtering, signal; And after voltage amplification, get into totalizer first input end mouth; Produce square-wave signal inner processing of digital signal processor simultaneously, become analog quantity and after voltage amplification, get into totalizer second input port through digital-to-analog conversion through frequency division;
Said totalizer is carried out signal plus to two input signals, and converts the drive current end that current signal acts on the semiconductor laser in the said resonance type micro gyro to through voltage-controlled current source;
The size of regulating semiconductor laser drive current through digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road; Then this moment, CCW way word signal reflected the angular velocity of rotation of optical gyroscope, had realized the closed-loop control of semiconductor laser drive current.
2. resonance type micro according to claim 1 is learned the gyro modulation-demo-demodulation method; It is characterized in that; Said size through digital signal processor adjusting semiconductor laser drive current makes the laser emitting light frequency be positioned at resonance paddy center, CW road; Then CCW way word signal reflected and specifically comprised the angular velocity of rotation of optical gyroscope this moment:
The size of regulating drive current through the PI controller in the digital signal processor makes the laser emitting light frequency be positioned at resonance paddy center, CW road, and then the output square wave amplitude of CCW way word signal has reflected the angular velocity of rotation of optical gyroscope;
This CCW way word signal is exported as data after the digital processing of digital filtering, signal demodulation.
3. resonance type micro according to claim 1 is learned the gyro modulation-demo-demodulation method, it is characterized in that said method also comprises:
In digital signal processor; Digital input amount through setting DA in the temperature conditioning unit is a constant; Make to be output as constant voltage, produce the temperature control end that steady current acts on said semiconductor laser, realize thermostatic control said semiconductor laser through voltage amplification and voltage-to-current conversion.
4. a resonance type micro is learned the gyro modulation-demodulation device, it is characterized in that said device comprises sampling unit, modulation and closed-loop control unit, digital signal processor, wherein:
Said sampling unit; After the clockwise light path CW detector that is used for resonance type micro is learned gyro and the light intensity signal of light path CCW detector output counterclockwise convert electric signal to, respectively through prime amplifier amplify, analog to digital converter converts CW way word signal and CCW way word signal to;
Said modulation and closed-loop control unit; Be used for said CW way word signal is separated mediation PI controller digital processing after digital-to-analog conversion becomes analog quantity through digital filtering, signal; And after voltage amplification, get into totalizer first input end mouth; Produce square-wave signal inner processing of digital signal processor simultaneously, become analog quantity and after voltage amplification, get into totalizer second input port through digital-to-analog conversion through frequency division;
Said modulation and closed-loop control unit carry out signal plus through said totalizer to two input signals, and convert the drive current end that current signal acts on the semiconductor laser in the said resonance type micro gyro to through voltage-controlled current source;
The size that semiconductor laser drive current is regulated through digital signal processor in said modulation and closed-loop control unit makes the laser emitting light frequency be positioned at resonance paddy center, CW road; Then this moment, CCW way word signal reflected the angular velocity of rotation of optical gyroscope, had realized the closed-loop control of semiconductor laser drive current.
5. resonance type micro according to claim 4 is learned the gyro modulation-demodulation device, it is characterized in that said device also comprises temperature conditioning unit,
The digital input amount that said temperature conditioning unit is set DA in the temperature conditioning unit through digital signal processor is a constant; Make and be output as constant voltage; Produce the temperature control end that steady current acts on said semiconductor laser through voltage amplification and voltage-to-current conversion, realize thermostatic control said semiconductor laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103356724A CN102506844A (en) | 2011-10-28 | 2011-10-28 | Modulation-demodulation method of resonance type micro-optical gyro and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103356724A CN102506844A (en) | 2011-10-28 | 2011-10-28 | Modulation-demodulation method of resonance type micro-optical gyro and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102506844A true CN102506844A (en) | 2012-06-20 |
Family
ID=46218951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103356724A Pending CN102506844A (en) | 2011-10-28 | 2011-10-28 | Modulation-demodulation method of resonance type micro-optical gyro and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102506844A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105953783A (en) * | 2016-04-29 | 2016-09-21 | 重庆华渝电气集团有限公司 | Fiber optic gyro modulation-demodulation method, system, extrinsic modulation method and device |
| CN109959372A (en) * | 2019-04-02 | 2019-07-02 | 浙江大学 | Implementation method and device based on sine-bipolarity serrasoid phase modulation two-way close loop resonance formula optical gyroscope |
| CN112928992A (en) * | 2019-12-05 | 2021-06-08 | 京信通信技术(广州)有限公司 | OOK modulation-demodulation circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042471A (en) * | 2007-01-22 | 2007-09-26 | 浙江大学 | Triangular wave phase modulation method of resonant cavity optical fiber gyroscope and apparatus thereof |
| 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 |
-
2011
- 2011-10-28 CN CN2011103356724A patent/CN102506844A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042471A (en) * | 2007-01-22 | 2007-09-26 | 浙江大学 | Triangular wave phase modulation method of resonant cavity optical fiber gyroscope and apparatus thereof |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 冯丽爽等: "《微光学陀螺双频率调制理论与实验研究》", 《传感技术学报》, vol. 21, no. 2, 28 February 2008 (2008-02-28), pages 341 - 345 * |
| 洪灵菲等: "《谐振式微光学陀螺频率跟踪与锁定技术研究》", 《中国激光》, vol. 38, no. 9, 30 September 2011 (2011-09-30) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103115628B (en) * | 2013-01-23 | 2015-10-21 | 北京航空航天大学 | A kind of resonant mode optical gyroscope scale factor method of testing |
| CN105953783A (en) * | 2016-04-29 | 2016-09-21 | 重庆华渝电气集团有限公司 | Fiber optic gyro modulation-demodulation method, system, extrinsic modulation method and device |
| CN105953783B (en) * | 2016-04-29 | 2018-08-17 | 重庆华渝电气集团有限公司 | Optical fibre gyro modulation-demo-demodulation method, system, extrinsic modulator approach and device |
| CN109959372A (en) * | 2019-04-02 | 2019-07-02 | 浙江大学 | Implementation method and device based on sine-bipolarity serrasoid phase modulation two-way close loop resonance formula optical gyroscope |
| CN112928992A (en) * | 2019-12-05 | 2021-06-08 | 京信通信技术(广州)有限公司 | OOK modulation-demodulation circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102109345B (en) | Digital signal processing method and device for micro-mechanical gyroscope | |
| CN101270991B (en) | System for measuring interfere type optic fiber gyroscope eigenfrequency and half-wave voltage adopting square wave modulation | |
| CN111174773B (en) | Multi-phase modulation and demodulation fiber-optic gyroscope multi-closed-loop algorithm | |
| CN109990773A (en) | A kind of detection of interference optical fiber top loop gain and closed-loop control system and control method | |
| CN102519445B (en) | Resonance optic gyro based on digital phase oblique wave frequency shift technology | |
| CN102722204B (en) | Control device of bias voltage of electro-optical intensity modulator and control method thereof | |
| CN103389084B (en) | Based on the resonance type optical fiber gyro of two coupled fiber ring resonator coherence effect | |
| CN104713539B (en) | A kind of long control system of laser gyro cavity and control method | |
| CN102353366B (en) | Closed loop detection apparatus for silicon micromachined/dynamically tuned hybrid gyroscope | |
| CN102445198B (en) | Alternating-current frequency stabilization system and method for four-frequency laser gyroscope | |
| CN110375727B (en) | Closed-loop fiber optic gyroscope signal modulation method | |
| CN102269590B (en) | Apparatus and method for inhibiting intensity noise in optical signal | |
| CN100458367C (en) | Four-state modulation and demodulation method for automatically tracking optical fiber gyro 2pai voltage | |
| CN103776469A (en) | Field programmable gate array (FPGA)-based temperature control and temperature compensation circuit device for silicon microgyroscope | |
| CN102506844A (en) | Modulation-demodulation method of resonance type micro-optical gyro and device | |
| CN106371230B (en) | A kind of light ball modulator modulation amplitude closed-loop control system and control method based on second harmonic | |
| CN109186581A (en) | It is a kind of that integrated optical fiber gyroscope is multiplexed without the microminiature of refrigeration light source based on 850nm | |
| CN111220139B (en) | Micro-electro-mechanical multi-ring gyro force balance mode measurement and control circuit system | |
| CN106979776B (en) | Digital closed-loop control method of fiber-optic gyroscope based on sigma-delta modulation | |
| CN101509772B (en) | Optical phase detecting high precision silicon microelectromechanical gyroscope | |
| CN114993281A (en) | Full-digital closed-loop angular velocity detection system and method based on low coherent light | |
| CN113310483B (en) | Real-time tracking device and method for eigenfrequency of digital closed-loop fiber-optic gyroscope | |
| CN102520209B (en) | Quartz flexible accelerometer based on laser self-mixing interference | |
| CN111026180A (en) | STM32+ FPGA-based SERF inertia measuring device high-stability laser electric control system | |
| CN113607150A (en) | Quartz gyro error suppression method of time division driving and orthogonal force feedback closed loop |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120620 |