CN109443341B - Circuit circuit detachable ultra-small volume photoelectric separation type optical fiber gyroscope - Google Patents
Circuit circuit detachable ultra-small volume photoelectric separation type optical fiber gyroscope Download PDFInfo
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- CN109443341B CN109443341B CN201811501353.4A CN201811501353A CN109443341B CN 109443341 B CN109443341 B CN 109443341B CN 201811501353 A CN201811501353 A CN 201811501353A CN 109443341 B CN109443341 B CN 109443341B
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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
- G01C19/721—Details
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Abstract
The invention relates to a circuit line detachable type ultra-small volume photoelectric separation type optical fiber gyroscope, and belongs to the technical field of optical fiber sensing. The optical fiber gyroscope mainly comprises an outer shell, a bracket and a functional element; the external shell mainly comprises a base, an upper ring cover, a lower ring cover and a bottom cover, the internal functional element mainly comprises an optical fiber ring, a coupler, a Y waveguide, an SLD light source and a detector, and the optical fiber ring is separated from other functional elements through a support; the fiber optic gyroscope realizes the separation of the gyroscope circuit control board and the fiber optic loop on the basis of compact structure and small volume, and can realize the visible operation of the device and the pin lead thereof on the basis of not disassembling the light path device, thereby playing a convenient role in positioning the gyroscope circuit fault and reducing the consumption cost of gyroscope batch production.
Description
Technical Field
The invention relates to a circuit line detachable type ultra-small volume photoelectric separation type optical fiber gyroscope, and belongs to the technical field of optical fiber sensing.
Background
The fiber optic gyroscope obtains angular velocity information by detecting the phase difference of two-beam interference signals caused by the Sagnac effect. Compared with the traditional electromechanical gyroscope, the fiber optic gyroscope has the characteristics of large dynamic range, strong environmental interference resistance, long service life, small volume, low cost and the like, and is widely applied to the fields of military, civil use and the like. In some special application fields, such as navigation control of aviation missiles, rocket missiles and the like, the size and the weight of the gyro are severely limited, and an ultra-small-size fiber optic gyro is required to measure the angular velocity of the carrier. In addition, the fiber optic gyroscope sensitive fiber ring is greatly influenced by temperature and magnetic field interference, nonreciprocal phase shift caused by a shupe effect and a Faraday effect of the fiber optic gyroscope sensitive fiber ring cannot be distinguished from Sagnac phase shift caused by rotation, and large offset error is generated to influence the gyroscope precision, so that the isolation of the heating device and the sensitive fiber ring and the realization of photoelectric separation become an important direction for the development of the miniaturized fiber optic gyroscope technology.
In the optical fiber gyroscope in the prior art, because the internal optical device and the tail optical fiber are in one space, the tail optical fiber is easy to damage when being disassembled after the installation is finished, so that the shell and the inside can not be disassembled, the consumption cost is high, and the later maintenance and repair are not convenient.
Disclosure of Invention
In order to overcome the defects in the prior art and expand the application field of the optical fiber gyroscope, the invention aims to provide a circuit line detachable type ultra-small volume photoelectric separation type optical fiber gyroscope. The fiber optic gyroscope realizes the separation of the gyroscope circuit control board and the fiber optic loop on the basis of compact structure and small volume, and can realize the visible operation of the device and the pin lead thereof on the basis of not disassembling the light path device, thereby playing a convenient role in positioning the gyroscope circuit fault and reducing the consumption cost of gyroscope batch production.
In order to achieve the purpose of the invention, the following technical scheme is provided.
A circuit line detachable type ultra-small volume photoelectric separation type optical fiber gyroscope mainly comprises an external shell, a bracket and functional elements.
The external shell mainly comprises a base, an upper ring cover, a lower ring cover and a bottom cover, and is made of magnetic shielding materials so as to isolate the influence of the geomagnetic field and the circuit device on the electronic interference of the optical fiber loop. The bottom surface of the base is provided with a mounting hole at the self position of the optical fiber gyroscope, two corners at the lower end of the base are provided with mounting holes for mounting a lower ring cover, the lower ring cover is fixed on the base, the top end of the upper ring cover is provided with a functional element lead wire outlet hole, the bottom of the lower ring cover is provided with a mounting hole for mounting a bottom cover, and the contact end between the upper ring cover and the lower ring cover is provided with a concave-convex platform which can be embedded with each other so as to be matched and connected.
The internal functional element mainly comprises an optical fiber ring, a coupler, a Y waveguide, an SLD (super luminescent diode) light source and a detector, and the optical fiber ring is separated from the rest functional elements by a bracket.
The upper part of the bracket is one end parallel to the base, is used for fixedly placing the coupler, the Y waveguide, the SLD light source and the detector, is provided with a pore channel made of a soldering lug and is used for fixedly connecting the output signal shielding wire of the optical fiber gyroscope; the lower part of the support is a circular end face which is vertical to the base and is provided with a center hole and used for placing an optical fiber ring so as to realize physical isolation of the optical fiber ring and the heating functional element, the side wall of the circular end face of the support is provided with a mounting hole for mounting an upper ring cover, and the upper ring cover is fixed on the side wall of the circular end face of the support.
The support is fixedly installed on the base through screws, the polarization maintaining optical fiber ring is adhered to the circular end face of the support through glue, the Y waveguide, the SLD light source, the detector and the coupler pressing plate are fixedly installed at one end, parallel to the base, of the support through screws, the detector is located above the SLD light source, the distance is kept to be more than 2.5mm, and the coupler is pressed and fixed through the coupler pressing plate.
The Y waveguide, the SLD light source and a pin lead of the detector, namely a circuit passes through a lead wire outlet hole on the upper ring cover and is connected with an external fiber optic gyroscope circuit control board through a connector with a magnetic shielding cable; the coupler, the Y waveguide, the SLD light source and the tail optical fiber of the detector, namely a light path penetrates through a central hole of the circular end face of the support and is coiled on the upper surface of the polarization-maintaining optical fiber ring;
in the invention, the mounting holes are connected by screws so as to realize the detachable and fixed connection of the external shell and the functional element.
Preferably, an isolation boss is provided on the support between the Y-waveguide and the SLD light source to dissipate heat.
The minimum size element is preferably selected as the functional element, and the functional element is compactly arranged to realize ultra-small volume.
Advantageous effects
The invention provides a circuit line detachable ultra-small volume photoelectric separation type optical fiber gyroscope; the optical fiber gyroscope is compact and reasonable in layout and simplified in structure through optical devices, and influences of the Shupe effect caused by uneven temperature distribution and the Faraday effect caused by geomagnetism and electronic circuit interference on the gyroscope precision are reduced. The heat radiation and the electromagnetic interference of the gyro circuit control board to the light path are reduced through the separation of the light path circuit; the magnetic shielding material shell and the 220m polarization maintaining optical fiber ring are adopted to reduce the Faraday effect of the geomagnetic field on the loop; the polarization-maintaining optical fiber ring is separated from the SLD light source, the Y waveguide, the coupler and the detector through the L-shaped support, and the tail optical fiber of the functional element penetrates through a central hole in the circular end face of the support and is wound on the upper surface of the optical fiber ring, so that the heat radiation effect of the light source and the detector on an optical fiber loop is greatly reduced; the SLD light source, the Y waveguide and the detector pin lead penetrate through a lead wire outlet hole on the upper ring cover and are connected with an external gyro circuit control panel through a plug, the assembling and disassembling operation process of an external shell is convenient, safe and reliable, functional elements and lines thereof are visible and operable, the debugging of gyro parameters and the positioning of faults are facilitated, the requirements of batch production and actual use of the fiber-optic gyro can be met, and the practicability is high; the space layout of each functional element is reasonable and compact, the occupied space volume is reduced, and the overall size of the fiber-optic gyroscope is greatly reduced.
Drawings
Fig. 1 is a perspective view of the exterior of the fiber-optic gyroscope according to embodiment 1.
Fig. 2 is a perspective view of the inside of the fiber-optic gyroscope of embodiment 1.
The device comprises a base 1, a support 2, a fiber ring 3, a coupler 4, a Y waveguide 5, an SLD light source 6, a detector 7, a coupler pressure plate 8, a soldering lug 9, a lower ring cover 10, a bottom cover 11, an upper ring cover 12, a lead wire outlet hole 13
Detailed Description
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Example 1
A circuit line detachable type ultra-small volume photoelectric separation type optical fiber gyroscope is shown in figures 1 and 2 and mainly comprises an outer shell, an L-shaped bracket 2 and functional elements.
The outer shell mainly comprises a square base 1, a semi-cylindrical upper ring cover 12, a semi-cylindrical lower ring cover 10 and a semi-cylindrical bottom cover 11, wherein magnetic shielding materials are adopted to isolate the influence of the earth magnetic field and electronic interference of circuit devices on an optical fiber loop. The bottom surface of the base 1 is provided with a mounting hole at the position of the optical fiber gyroscope, two corners at the lower end of the base 1 are provided with mounting holes for mounting the lower ring cover 10, the lower ring cover 10 is fixed on the base 1, the top end of the upper ring cover 12 is provided with a functional element lead wire outlet hole 13, the bottom of the lower ring cover 10 is provided with a mounting hole for mounting the bottom cover 11, and the contact end between the upper ring cover 12 and the lower ring cover 10 is provided with a concave-convex platform which can be embedded with each other so as to be matched and connected.
The internal functional elements mainly consist of a fiber ring 3, a coupler 4, a Y waveguide 5, an SLD light source 6 and a detector 7, and the fiber ring 3 is separated from the rest functional elements through a bracket 2.
The upper part of the bracket 2 is one end parallel to the base 1, is used for fixedly placing the coupler 4, the Y waveguide 5, the SLD light source 6 and the detector 7, is provided with a through hole made of a soldering lug 9 and is used for fixedly connecting the output signal shielding wire of the optical fiber gyroscope; the lower part of the support 2 is a circular end face which is vertical to the base 1 and is provided with a central hole and used for placing the optical fiber ring 3 so as to realize physical isolation of the optical fiber ring 3 and a heating functional element, a mounting hole for mounting the upper ring cover 12 is arranged on the side wall of the circular end face of the support 2, and the upper ring cover 12 is fixed on the side wall of the circular end face of the support 2.
The support 2 is fixedly installed on the base 1 through screws, the 220m long polarization maintaining optical fiber ring 3 is glued on the circular end face of the support 2, one end of the support 2 parallel to the base 1 is fixedly provided with a Y waveguide 5, an SLD light source 6, a detector 7 and a coupler pressing plate 8 through screws, the SLD light source 6 is located in the middle, the detector 7 is located above the SLD light source 6, the distance is kept to be more than 2.5mm, the Y waveguide 5 and the coupler 4 are respectively located on two sides of the SLD light source 6, and the coupler 4 is compressed and fixed through the coupler pressing plate 8.
The Y waveguide 5, the SLD light source 6 and a pin lead of the detector 7, namely a circuit passes through a lead wire outlet hole 13 on the upper ring cover 12 and is connected with an external optical fiber gyro circuit control board through a connector with a magnetic shielding cable; the coupler 4, the Y waveguide 5, the SLD light source 6 and the tail optical fiber of the detector 7, namely a light path penetrates through a central hole of the circular end face of the bracket 2 and is coiled on the upper surface of the polarization-maintaining optical fiber ring 3;
in the invention, the mounting holes are connected by screws so as to realize the detachable and fixed connection of the external shell and the functional element.
An isolation boss is provided on the support 2 between the Y waveguide 5 and the SLD light source 6 to dissipate heat. The functional elements are all selected from minimum-size elements, specifically: 1310nm polarization maintaining tail fiber SLD wide spectrum light source of the middle power 44, model GR 1349Q-13; 2 × 2 single-mode fiber coupler of Jiangsu optical pumping photoelectric type, model RC 1017-F; the working wavelength of the medium power 44 is Y waveguide of 1310nm polarization-maintaining tail fiber, model GC13YB 2010; the Wuhan long Yingtong 220m long polarization-maintaining optical fiber ring has the inner diameter of 15mm, the outer diameter of 12mm, the height of 18mm and the model PM 13-G-80-U13; the intermediate capacitor 44 is composed of a PIN-FET photoelectric detector with the working wavelength of 1310nm, model GD45215J-404BL-SB2, and is arranged compactly to realize ultra-small volume.
In the embodiment, the fiber-optic gyroscope is compact and reasonable in layout and simplified in structure through optical devices, so that the influence of the Shupe effect caused by uneven temperature distribution and the Faraday effect caused by geomagnetism and electronic circuit interference on the gyroscope precision is reduced, the circuits of the devices are visible and operable, and the debugging of gyroscope parameters and the positioning of faults are facilitated. According to the test method of the GJB 2426A-2004 optical fiber gyroscope, the zero-bias stability of the optical fiber gyroscope is not more than 0.8 DEG/h, the whole optical fiber gyroscope is semi-cylindrical, and the dimensions are 26X wide and 50X high (mm).
Claims (3)
1. The utility model provides a removable super small volume photoelectric separation type fiber optic gyroscope of circuit line which characterized in that: the fiber-optic gyroscope mainly comprises an external shell, a bracket (2) and a functional element;
the external shell mainly comprises a base (1), an upper ring cover (12), a lower ring cover (10) and a bottom cover (11), and all adopt magnetic shielding materials; the bottom surface of the base (1) is provided with a mounting hole at the self position of the optical fiber gyroscope, two corners at the lower end of the base (1) are provided with mounting holes for mounting a lower ring cover (10), the lower ring cover (10) is fixed on the base (1), the top end of an upper ring cover (12) is provided with a functional element lead wire outlet hole (13), the bottom of the lower ring cover (10) is provided with a mounting hole for mounting a bottom cover (11), and the contact end between the upper ring cover (12) and the lower ring cover (10) is provided with concave-convex tables which are embedded with each other for matching connection;
the internal functional element mainly comprises an optical fiber ring (3), a coupler (4), a Y waveguide (5), an SLD light source (6) and a detector (7), and the optical fiber ring (3) is separated from other functional elements through a support (2);
the upper part of the bracket (2) is one end parallel to the base (1) and is used for fixedly placing the coupler (4), the Y waveguide (5), the SLD light source (6) and the detector (7) and is provided with a pore channel made of a soldering lug (9); the lower part of the bracket (2) is a circular end face which is vertical to the base (1) and is provided with a central hole and used for placing the optical fiber ring (3), the side wall of the circular end face of the bracket (2) is provided with a mounting hole for mounting an upper ring cover (12), and the upper ring cover (12) is fixed on the side wall of the circular end face of the bracket (2);
the optical fiber ring optical fiber coupler is characterized in that a support (2) is fixedly arranged on a base (1), an optical fiber ring (3) is adhered to the circular end face of the support (2), a Y waveguide (5), an SLD light source (6), a detector (7) and a coupler pressing plate (8) are fixedly arranged at one end, parallel to the base (1), of the support (2), the detector (7) is located above the SLD light source (6), the distance is kept to be more than 2.5mm, and a coupler (4) is pressed and fixed through the coupler pressing plate (8);
the pin lead wires of the Y waveguide (5), the SLD light source (6) and the detector (7) penetrate through a lead wire outlet hole (13) on the upper ring cover (12) and are connected with an external optical fiber gyro circuit control board through a connector with a magnetic shielding cable; and tail optical fibers of the coupler (4), the Y waveguide (5), the SLD light source (6) and the detector (7) penetrate through a central hole of the circular end face of the support (2) and are coiled on the upper surface of the optical fiber ring (3).
2. The optical fiber gyro of claim 1, wherein the optical fiber gyro comprises: the mounting holes are connected through screws.
3. The circuit-line-detachable ultra-small-volume photoelectric separation type fiber-optic gyroscope according to claim 1 or 2, characterized in that: an isolation boss is arranged between the Y waveguide (5) and the SLD light source (6) on the bracket (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811501353.4A CN109443341B (en) | 2018-12-10 | 2018-12-10 | Circuit circuit detachable ultra-small volume photoelectric separation type optical fiber gyroscope |
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| CN201811501353.4A CN109443341B (en) | 2018-12-10 | 2018-12-10 | Circuit circuit detachable ultra-small volume photoelectric separation type optical fiber gyroscope |
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| CN109443341B true CN109443341B (en) | 2022-06-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033387A (en) * | 2020-07-31 | 2020-12-04 | 河北汉光重工有限责任公司 | Photoelectric separated subminiature optical fiber gyroscope |
| CN112097755A (en) * | 2020-09-16 | 2020-12-18 | 上海航天控制技术研究所 | Light path component structure for optical fiber gyroscope combined system |
| CN112097756A (en) * | 2020-09-16 | 2020-12-18 | 上海航天控制技术研究所 | Miniature optical fiber gyroscope combined system for satellite |
| CN112504282B (en) * | 2020-12-21 | 2023-07-14 | 北京控制工程研究所 | Single-shaft very high precision micrometer sensor |
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| CN206573125U (en) * | 2017-03-03 | 2017-10-20 | 何涛 | A kind of single shaft miniature fiber gyroscope |
| CN108931239A (en) * | 2018-04-27 | 2018-12-04 | 华中光电技术研究所（中国船舶重工集团有限公司第七七研究所） | A kind of embedded microminiature single axis fiber gyro |
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2018
- 2018-12-10 CN CN201811501353.4A patent/CN109443341B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6441366B1 (en) * | 1999-03-24 | 2002-08-27 | Bookham Technology Plc | Sealed fiber optic gyroscope assembly |
| CN1904554A (en) * | 2006-07-28 | 2007-01-31 | 北京航空航天大学 | Low power consumption optical fiber gyro unitized designing method for space application |
| CN101598554A (en) * | 2009-07-14 | 2009-12-09 | 北京航空航天大学 | A kind of fiber optic gyro framework of design according to sectorization |
| CN103389089A (en) * | 2013-07-25 | 2013-11-13 | 北京航空航天大学 | Six-redundancy-type optical fiber strapdown inertial navigation system (SINS) |
| CN106595629A (en) * | 2016-12-09 | 2017-04-26 | 上海新跃联汇电子科技有限公司 | Optical fiber gyroscope with sensitive axial direction parallel to mounting surface |
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