CN101033969A - Bandwidth evaluation system of fiber optic gyroscope - Google Patents
Bandwidth evaluation system of fiber optic gyroscope Download PDFInfo
- Publication number
- CN101033969A CN101033969A CN 200710066969 CN200710066969A CN101033969A CN 101033969 A CN101033969 A CN 101033969A CN 200710066969 CN200710066969 CN 200710066969 CN 200710066969 A CN200710066969 A CN 200710066969A CN 101033969 A CN101033969 A CN 101033969A
- Authority
- CN
- China
- Prior art keywords
- circuit
- sensitive detector
- position sensitive
- semiconductor laser
- tilter
- 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
- 238000011156 evaluation Methods 0.000 title claims description 11
- 239000000835 fiber Substances 0.000 title claims description 10
- 239000004065 semiconductor Substances 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 4
- 230000003760 hair shine Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 238000000691 measurement method Methods 0.000 abstract description 2
- 239000013307 optical fiber Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Gyroscopes (AREA)
Abstract
This invention relates to a kind of fiber-optic gyro band width measuring and commenting system. First semiconductor laser driver circuit power the semiconductor laser to produce laser that is sinusoidal variation intensity; the laser with entrance angle thet beat down on reflector fixed on tilter; the reflection ray take turns past focusing lens, cylinder mirror, at last beat down on position sensitive detector; position sensitive detector generate feebleness electric current signal and transit processing circuit, Analog-Digital Conversion circuit, then be picked to calculator; at the same time fix gyroscope on tilter. This system adopts alternating-current measurement method, owing to 1 / f noise and stray light disturb, through modulation demodulation to removal noise to carrier frequency, then past upper limiting filter, flit the noise; so this system has strong interference-free feature, high accuracy , could precisely detect fiber-optic gyro's band width.
Description
Technical field
The present invention relates to measuring system, a kind of specifically bandwidth evaluation system of fiber optic gyroscope of position-based sensitive detector
Background technology
In the high-precision optical fiber gyro R﹠D process, lack the system of measurement for Evaluation optical fibre gyro bandwidth, and internal optical fiber gyro technology develop rapidly at present, technology is ripe gradually, is badly in need of the bandwidth that a cover system comes the measurement for Evaluation fibre optic gyroscope.
Summary of the invention
The object of the present invention is to provide a kind of bandwidth evaluation system of fiber optic gyroscope.
The technical solution used in the present invention is: comprise tilter, gyroscope, catoptron, semiconductor laser, condenser lens, cylindrical mirror, position sensitive detector, driving circuit and data processing circuit and analog to digital conversion circuit.Semiconductor laser device driving circuit drives semiconductor laser and produces the laser that intensity is sinusoidal variations, shines on the catoptron that is fixed on the tilter with incident angle θ, and by condenser lens, cylindrical mirror shines on the position sensitive detector reflection ray successively; The low current signal that position sensitive detector produces is through data processing circuit, and analog to digital conversion circuit collects computing machine; Gyroscope is fixed on the tilter.
Described modulation circuit adopts the method for modulation injection current to obtain the laser that intensity is sinusoidal variations; Sinusoidal signal generation circuit produces sine voltage signal, through inclined to one side value and amplification and voltage-current converter circuit, drives semiconductor laser and obtains the laser that intensity is sinusoidal variations; Sine wave provides reference signal for detection in the data processing circuit.
Described data processing circuit adopts the mode of demodulation, low-pass filtering; The low current signal that position sensitive detector produces is changed through current/voltage successively and is amplified, separates the mediation low-pass filter circuit, then by plus-minus method and division circuit, obtain the position signalling of light,, collect computing machine by analog to digital conversion circuit on the position sensitive detector surface.
The beneficial effect that the present invention has is: native system adopts AC measurement method, because 1/f noise, interference of stray light etc. are the low frequency additive noise, by modulation noise are moved carrier frequency, by low-pass filter, noise filtering is fallen then; So the native system antijamming capability is strong, the precision height can be measured the bandwidth of optical fibre gyro accurately.
Description of drawings
Fig. 1 is the structural principle block diagram of bandwidth evaluation system of fiber optic gyroscope;
Fig. 2 is the semiconductor laser device driving circuit and the position sensitive detector signal processing circuit block diagram of bandwidth evaluation system of fiber optic gyroscope;
Among the figure: 1. tilter, 2. gyroscope, 3. catoptron, 4. semiconductor laser, 5. condenser lens, 6. cylindrical mirror, 7. position sensitive detector, 8. driving circuit and data processing circuit, 9 analog to digital conversion circuits.
Embodiment
In Fig. 1, tilter 1, gyroscope 2 and catoptron 3 are solidified as a whole, driving circuit drives semiconductor laser 4, produce the light that intensity becomes sinusoidal variations, shine on the catoptron with angle θ, reflected light by condenser lens 5, cylindrical mirror 6, shines on the position sensitive detector 7 successively, the low current signal that position sensitive detector 7 produces is through data processing circuit 8, and analog to digital conversion circuit 9 collects computing machine; Know that by geometrical optics knowledge when the tilter angle changed θ, reflection ray changed with 2 θ, the angular transformation of tilter is converted to the variation of flare on position sensitive detector; Position sensitive detector changes light signal into faint current signal, this current signal both had been the position signalling of hot spot on position sensitive detector through data processing circuit, pass through analog to digital conversion circuit 9 again, collect computing machine, promptly can obtain the angular velocity of tilter by follow-up calculus of differences; The output data of synchronous record gyroscope 2 by the data comparative analysis, can obtain the bandwidth of optical fibre gyro.
In Fig. 2, be light source with semiconductor laser 4, adopt the method for modulation injection current to obtain the light that intensity is sinusoidal variations; The sinusoidal circuit generation sine voltage signal that takes place, through inclined to one side value and amplification, the electric current and voltage conversion, driving semiconductor laser 4 obtains the light that intensity is sinusoidal variations; The low current signal that position sensitive detector 7 produces is successively through current/voltage conversion and amplification, demodulation, low-pass filtering, then by plus-minus method and division circuit, obtain the position signalling of light on the position sensitive detector surface, by analog to digital conversion, collect computing machine again, obtain the angular velocity of tilter by follow-up data processing; Wherein low-pass filter circuit adopts the Butterworth mode filter on 4 rank, and effectively filtering low-frequency noise and extraneous interference of stray light guarantee measuring accuracy; Analog to digital conversion circuit is bought the AD8201H of Rui Bo company, and other circuit are universal circuit.
Claims (3)
1. bandwidth evaluation system of fiber optic gyroscope is characterized in that: comprise tilter (1), gyroscope (2), catoptron (3), semiconductor laser (4), condenser lens (5), cylindrical mirror (6), position sensitive detector (7), driving circuit and data processing circuit (8) and analog to digital conversion circuit (9); Semiconductor laser device driving circuit (8) drives semiconductor laser (4) and produces the laser that intensity is sinusoidal variations, shine on the catoptron (3) that is fixed on the tilter with incident angle θ, reflection ray is successively by condenser lens (5), cylindrical mirror (6) shines on the position sensitive detector (7); The low current signal that position sensitive detector (7) produces is through data processing circuit (8), and analog to digital conversion circuit (9) collects computing machine; Gyroscope (2) is fixed on the tilter.
2. bandwidth evaluation system of fiber optic gyroscope according to claim 1 is characterized in that described driving circuit, and described modulation circuit adopts the method for modulation injection current to obtain the laser that intensity is sinusoidal variations; Sinusoidal signal generation circuit produces sine voltage signal, through inclined to one side value and amplification and voltage-current converter circuit, drives semiconductor laser (4) and obtains the laser that intensity is sinusoidal variations; Sine wave provides reference signal for detection in the data processing circuit.
3. bandwidth evaluation system of fiber optic gyroscope according to claim 1 is characterized in that described data processing circuit, and described data processing circuit adopts the mode of demodulation, low-pass filtering; The low current signal that position sensitive detector produces is changed through current/voltage successively and is amplified, separates the mediation low-pass filter circuit, then by plus-minus method and division circuit, obtain the position signalling of light,, collect computing machine by analog to digital conversion circuit (9) on the position sensitive detector surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710066969 CN101033969A (en) | 2007-01-29 | 2007-01-29 | Bandwidth evaluation system of fiber optic gyroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710066969 CN101033969A (en) | 2007-01-29 | 2007-01-29 | Bandwidth evaluation system of fiber optic gyroscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101033969A true CN101033969A (en) | 2007-09-12 |
Family
ID=38730629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710066969 Pending CN101033969A (en) | 2007-01-29 | 2007-01-29 | Bandwidth evaluation system of fiber optic gyroscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101033969A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175264A (en) * | 2011-01-23 | 2011-09-07 | 浙江大学 | Method for measuring bandwidth of optical fiber gyroscope |
| CN102506847A (en) * | 2011-10-28 | 2012-06-20 | 北京航空航天大学 | Resonance type fiber optic gyro |
| CN104457791A (en) * | 2014-11-27 | 2015-03-25 | 北京航天时代光电科技有限公司 | Method for measuring fiber-optic gyroscope bandwidth under static condition |
| CN113654574A (en) * | 2021-10-19 | 2021-11-16 | 深圳奥斯诺导航科技有限公司 | High-frequency high-thrust dynamic test swing platform and test method thereof |
-
2007
- 2007-01-29 CN CN 200710066969 patent/CN101033969A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175264A (en) * | 2011-01-23 | 2011-09-07 | 浙江大学 | Method for measuring bandwidth of optical fiber gyroscope |
| CN102506847A (en) * | 2011-10-28 | 2012-06-20 | 北京航空航天大学 | Resonance type fiber optic gyro |
| CN104457791A (en) * | 2014-11-27 | 2015-03-25 | 北京航天时代光电科技有限公司 | Method for measuring fiber-optic gyroscope bandwidth under static condition |
| CN104457791B (en) * | 2014-11-27 | 2017-05-10 | 北京航天时代光电科技有限公司 | Method for measuring fiber-optic gyroscope bandwidth under static condition |
| CN113654574A (en) * | 2021-10-19 | 2021-11-16 | 深圳奥斯诺导航科技有限公司 | High-frequency high-thrust dynamic test swing platform and test method thereof |
| CN113654574B (en) * | 2021-10-19 | 2022-01-25 | 深圳奥斯诺导航科技有限公司 | High-frequency high-thrust dynamic test swing platform and test method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101270991B (en) | System for measuring interfere type optic fiber gyroscope eigenfrequency and half-wave voltage adopting square wave modulation | |
| FR3085071B1 (en) | OPTICAL FIBER DISTRIBUTED CONTROL SYSTEM AND METHOD | |
| CN102095538A (en) | Data demodulation method for polarization maintaining fiber stress sensing | |
| JPS58182524A (en) | System for detecting change in light frequency | |
| CN101033969A (en) | Bandwidth evaluation system of fiber optic gyroscope | |
| CN103712960A (en) | Photo-thermal detection device employing cascaded phase-locked detection mode and detection method for detection device | |
| JPH10103914A (en) | Apparatus for inspecting high-speed defect analysis | |
| CN104634986A (en) | Infrared photoelectric revolving speed meter | |
| CN111897274A (en) | FPGA-based weak signal detection device and method | |
| CN205373652U (en) | Simple and easy CCD measures fiber diameter device | |
| CN102221356B (en) | Device and method for measuring laser incident angle by sinusoidally modulating multi-beam laser heterodyne secondary harmonics with Doppler galvanometer | |
| CN201318936Y (en) | Contour measuring projection device | |
| CN202709996U (en) | Device capable of measuring film thickness accurately | |
| CN103983341A (en) | High-precision laser speckle micro-vibration measurement system and measurement method | |
| CN116202631A (en) | Device and method for rapidly positioning initial wavelength of tunable laser source | |
| CN214372307U (en) | Digital sphere diameter instrument | |
| CN102183491A (en) | Detecting device for internal structure of jewelry | |
| CN204807044U (en) | Great -scale displacement sensor | |
| CN208254426U (en) | Portable two-dimensional dynamic photoelectric self-collimater device | |
| CN113358205A (en) | Measuring device and measuring method for synchronously detecting blade vibration and blade tip clearance | |
| CN106840370B (en) | Device and method for measuring resonant frequency of optical fiber interference detector | |
| CN203572835U (en) | Infrared photoelectric rotational speed measuring instrument | |
| CN208551769U (en) | A kind of optical coherence tomography system | |
| JPS6280507A (en) | Measuring method for cracking on road surface | |
| CN111857043A (en) | Synchronous acquisition system and acquisition method for three-axis five-degree-of-freedom measuring head data of machine tool |
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 |