CN203719665U - Small-sized closed-loop fiber optic gyroscope - Google Patents
Small-sized closed-loop fiber optic gyroscope Download PDFInfo
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- CN203719665U CN203719665U CN201320865039.0U CN201320865039U CN203719665U CN 203719665 U CN203719665 U CN 203719665U CN 201320865039 U CN201320865039 U CN 201320865039U CN 203719665 U CN203719665 U CN 203719665U
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- 239000000835 fiber Substances 0.000 title claims abstract description 27
- 238000009434 installation Methods 0.000 claims abstract description 5
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract 2
- 239000013307 optical fiber Substances 0.000 description 7
- 101150090425 SLD1 gene Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model relates to a small-sized closed-loop fiber optic gyroscope, comprising a shell, and a light source plate and a detection plate which are arranged in the shell, wherein an SLD (Super Luminescent Diode), a coupler, a Y waveguide, an optic fiber ring and a detector are arranged on the light source plate; a preamplifier circuit, an A/D (Analog to Digital) converter, an FPGA (Field Programmable Gate Array), a D/A (Digital to Analog) converter, a post-amplifier circuit and an interface circuit are arranged on the detection plate; the SLD, the coupler, the Y waveguide and the optic fiber ring are connected in sequence; the detector is connected with the coupler and the preamplifier circuit respectively; the preamplifier circuit, the A/D converter, the FPGA, the D/A converter and the post-amplifier circuit are connected in sequence; the FPGA is connected with the interface circuit; the post-amplifier circuit is connected with the Y waveguide. Compared with the prior art, the small-sized closed-loop fiber optic gyroscope has the advantages of high generality, replaceability, small size, high accuracy, convenience in installation and the like, and can replace conventional mechanical gyroscope and open-loop fiber optic gyroscope.
Description
Technical field
The utility model relates to a kind of optical fibre gyro, especially relates to a kind of miniaturization closed-loop fiber optic gyroscope.
Background technology
Gyroscope is a kind of angular rate sensor, is the device of responsive relative inertness Space Angle motion, is current for determining the main sensors of movable body spatial movement attitude, is widely used in the field such as Aeronautics and Astronautics and navigation.Along with improving constantly of arm precision prescribed, traditional mechanical gyro because manufacturing complexity, expensive and poor-performing is eliminated gradually, and open-loop optical fiber gyro and MEMS Gyro Precision are poor, cannot meet its performance index.Closed-loop fiber optic gyroscope, because precision is high, reliability is high and technique is simple, is used to substitute traditional mechanical gyro and open-loop optical fiber gyro.But due to the high request of the aspects such as volume, weight, mounting means, existing closed-loop fiber optic gyroscope cannot meet, in addition, optical fibre gyro important development direction is to low cost miniaturization now.Therefore be extremely necessary to design and develop a kind of above small-sized closed-loop fiber optic gyroscope requiring that meets.
Utility model content
The purpose of this utility model is exactly to provide a kind of miniaturization closed-loop fiber optic gyroscope in order to overcome the defect that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions: a kind of miniaturization closed-loop fiber optic gyroscope, it is characterized in that, comprise housing and be located at light source board and the detecting plate in housing, described light source board is provided with SLD, coupling mechanism, Y waveguide, fiber optic loop and detector, described detecting plate is provided with pre-amplification circuit, A/D converter, FPGA, D/A converter, rearmounted amplifying circuit and interface circuit, described SLD, coupling mechanism, Y waveguide and fiber optic loop connect successively, described detector is connected with coupling mechanism and pre-amplification circuit respectively, described pre-amplification circuit, A/D converter, FPGA, D/A converter and rearmounted amplifying circuit connect successively, described FPGA is connected with interface circuit, described rearmounted amplifying circuit is connected with Y waveguide.
Described housing is rectangular structure, and four seamed edges of this rectangular structure are chamfering structure.
Described shell dimension is 60mm × 35mm × 30mm, and error is ± 0.1mm.
In described housing sidewall, offer the perforate for connecting plug-in unit.
Described housing bottom is provided with installation screw.
Described coupling mechanism is 2*2 optical coupler.
Compared with prior art, the utlity model has highly versatile and replaceability, can substitute traditional mechanical gyro and open-loop optical fiber gyro, have that volume is little, precision is high and the advantage such as easy for installation.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the structural representation of the utility model housing;
Fig. 3 is the structural representation of the utility model housing bottom:
Fig. 4 is the utility model fundamental diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
As Figure 1-3, a kind of miniaturization closed-loop fiber optic gyroscope, it is characterized in that, comprise housing and be located at light source board A and the detecting plate B in housing, described housing is rectangular structure, and shell dimension is 60mm × 35mm × 30mm, error is ± 0.1mm, four seamed edges of rectangular structure are chamfering structure, and to avoid operating personnel to damage, housing bottom is provided with the mounting hole for installing, described light source board A is provided with SLD1, coupling mechanism 2, Y waveguide 3, fiber optic loop 4 and detector 5, described detecting plate B is provided with pre-amplification circuit 6, A/D converter 7, FPGA8, D/A converter 9, rearmounted amplifying circuit 10 and interface circuit 11, described SLD1, coupling mechanism 2, Y waveguide 3 and fiber optic loop 4 connect successively, described detector 5 is connected with coupling mechanism 2 and pre-amplification circuit 6 respectively, described pre-amplification circuit 6, A/D converter 7, FPGA8, D/A converter 9 and rearmounted amplifying circuit 10 connect successively, described FPGA8 is connected with interface circuit 11, described rearmounted amplifying circuit 10 is connected with Y waveguide 3.
The light that described SLD1 sends passes through coupling mechanism 2 successively, the rear arrival fiber optic loop 4 of Y waveguide 3, after oppositely arriving Y waveguide 3 afterwards, interfere, arrive detector 5 finally by overcoupling device 2, described detector 5 is sent to pre-amplification circuit 6 after light signal is converted to electric signal, described pre-amplification circuit 6 carries out sending to A/D converter 7 after filtering to the electric signal receiving, after converting thereof into digital signal, described A/D converter 7 sends to FPGA8, described FPGA8 separates mediation Integral Processing to the digital signal receiving, then drive Y waveguide 3 to carry out photoelectric control by D/A converter 9 and rearmounted amplifying circuit 10 successively, complete whole working cycle, the rate signal that FPGA8 obtains processing is simultaneously delivered to interface circuit 11 and is exported.
Optical fibre gyro is based on Sagnac effect, and the pass of interference light light intensity and Sagnac phase shift is cosine function.The method that detects Sagnac phase differential is to introduce the modulation of one ± pi/2.In the time that gyro is static, pi/2 phase place light intensity equates with-pi/2 light intensity; In the time that gyro rotates, pi/2 phase place light intensity with-pi/2 light intensity is just unequal, now introduce feedback phase poor, until pi/2 phase place light intensity just equates with-pi/2 light intensity, just obtain the Sagnac phase differential being directly proportional to angular speed, thereby calculate angular speed, export by serial ports, as shown in Figure 4.
Compared with prior art, the utlity model has highly versatile and replaceability, can substitute traditional mechanical gyro and open-loop optical fiber gyro, have that volume is little, precision is high and the advantage such as easy for installation.
Claims (6)
1. a miniaturization closed-loop fiber optic gyroscope, it is characterized in that, comprise housing and be located at light source board and the detecting plate in housing, described light source board is provided with SLD, coupling mechanism, Y waveguide, fiber optic loop and detector, described detecting plate is provided with pre-amplification circuit, A/D converter, FPGA, D/A converter, rearmounted amplifying circuit and interface circuit, described SLD, coupling mechanism, Y waveguide and fiber optic loop connect successively, described detector is connected with coupling mechanism and pre-amplification circuit respectively, described pre-amplification circuit, A/D converter, FPGA, D/A converter and rearmounted amplifying circuit connect successively, described FPGA is connected with interface circuit, described rearmounted amplifying circuit is connected with Y waveguide.
2. a kind of miniaturization closed-loop fiber optic gyroscope according to claim 1, is characterized in that, described housing is rectangular structure, and four seamed edges of this rectangular structure are chamfering structure.
3. a kind of miniaturization closed-loop fiber optic gyroscope according to claim 2, is characterized in that, described shell dimension is 60mm × 35mm × 30mm, and error is ± 0.1mm.
4. a kind of miniaturization closed-loop fiber optic gyroscope according to claim 1, is characterized in that, offers the perforate for connecting plug-in unit in described housing sidewall.
5. a kind of miniaturization closed-loop fiber optic gyroscope according to claim 1, is characterized in that, described housing bottom is provided with installation screw.
6. a kind of miniaturization closed-loop fiber optic gyroscope according to claim 1, is characterized in that, described coupling mechanism is 2*2 optical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320865039.0U CN203719665U (en) | 2013-12-25 | 2013-12-25 | Small-sized closed-loop fiber optic gyroscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320865039.0U CN203719665U (en) | 2013-12-25 | 2013-12-25 | Small-sized closed-loop fiber optic gyroscope |
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| Publication Number | Publication Date |
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| CN203719665U true CN203719665U (en) | 2014-07-16 |
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| CN201320865039.0U Expired - Lifetime CN203719665U (en) | 2013-12-25 | 2013-12-25 | Small-sized closed-loop fiber optic gyroscope |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457731A (en) * | 2014-12-10 | 2015-03-25 | 西安中科华芯测控有限公司 | Biaxial optical fiber gyroscope |
| CN104613955A (en) * | 2015-02-12 | 2015-05-13 | 重庆华渝电气集团有限公司 | Fiber-optic gyroscope with high angular rate and high precision simultaneously |
| CN106323339A (en) * | 2016-08-23 | 2017-01-11 | 中国航空工业集团公司西安飞行自动控制研究所 | Manufacturing method for low intensity and tiny noise closed-loop fiber-optic gyroscope |
| CN106908050A (en) * | 2015-12-22 | 2017-06-30 | 上海亨通光电科技有限公司 | A kind of fibre optic gyroscope at exportable attitude orientation angle |
| CN110502764A (en) * | 2018-05-17 | 2019-11-26 | 上海亨通光电科技有限公司 | A kind of method for predicting reliability of optical fibre gyro |
-
2013
- 2013-12-25 CN CN201320865039.0U patent/CN203719665U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457731A (en) * | 2014-12-10 | 2015-03-25 | 西安中科华芯测控有限公司 | Biaxial optical fiber gyroscope |
| CN104613955A (en) * | 2015-02-12 | 2015-05-13 | 重庆华渝电气集团有限公司 | Fiber-optic gyroscope with high angular rate and high precision simultaneously |
| CN104613955B (en) * | 2015-02-12 | 2017-06-06 | 重庆华渝电气集团有限公司 | One kind takes into account larger velocity gauge and high-precision optical fibre gyro |
| CN106908050A (en) * | 2015-12-22 | 2017-06-30 | 上海亨通光电科技有限公司 | A kind of fibre optic gyroscope at exportable attitude orientation angle |
| CN106323339A (en) * | 2016-08-23 | 2017-01-11 | 中国航空工业集团公司西安飞行自动控制研究所 | Manufacturing method for low intensity and tiny noise closed-loop fiber-optic gyroscope |
| CN110502764A (en) * | 2018-05-17 | 2019-11-26 | 上海亨通光电科技有限公司 | A kind of method for predicting reliability of optical fibre gyro |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200436 No. 555 West Road, Zhabei District, Shanghai Patentee after: Shanghai Aoshi Control Technology Co.,Ltd. Address before: 200436 No. 555 West Road, Zhabei District, Shanghai Patentee before: SHANGHAI HENGTONG PHOTOELECTRIC TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |
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| CX01 | Expiry of patent term |