Miniaturized double-shaft fiber-optic gyroscope

Abstract

The utility model provides a miniaturized double-shaft optical fiber gyroscope. In the light source assembly, a light source driving plate is contained in a base, and an SLD light source is embedded in the front wall of the base. In the optical path assembly, an X-axis optical fiber ring and a Y-axis optical fiber ring are embedded in the front wall and the right wall of a base respectively, a main coupler, an X-axis coupler and a Y-axis coupler are embedded in the left wall and the rear wall of the base respectively, and an X-axis waveguide and a Y-axis waveguide are embedded in the left wall and the rear wall of the base respectively. In the signal collecting and processing assembly, an X-axis detector and a Y-axis detector are welded to a front circuit board through pins respectively, the front circuit board is embedded in the bottom wall of the base, and a host circuit board is embedded in the top wall of the base. According to the optical fiber gyroscope, the frameless optical fiber ring is used, and layout optimization is carried out on the arrangement structure of each electronic component of the gyroscope on the base, so that the spatial layout of each component is reasonable, the overall structure of the gyroscope is compact, the size is small, and the high requirement of a control system for miniaturization can be met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of double-shaft fiber-optic gyroscope, and particularly relates to a miniaturized double-shaft fiber-optic gyroscope. BACKGROUND

[0002] The fiber-optic gyroscope is a full solid-state inertial measurement instrument based on the Sagnac effect, has the advantages of impact resistance, high sensitivity, long service life, large dynamic range, short start-up time and the like, and has been widely applied to various control systems.

[0003] The double-shaft fiber-optic gyroscope is widely applied to the fields of small inertial measurement units, inertial navigation, servo tracking and the like due to its small size, light weight and high stability. With the miniaturization demand of the control system, higher requirements are put forward for the miniaturization of the fiber-optic gyroscope. The existing double-shaft fiber-optic gyroscope has an outer dimension of 60mm x 64mm x 43mm, and the double-shaft fiber-optic gyroscope proposed in the Chinese patent with the application number 202010642911.X has a size of 60mm x 50mm x 45mm, but the double-shaft fiber-optic gyroscope with these sizes still cannot meet the high demand for miniaturization of some control systems. SUMMARY

[0004] The utility model aims at solving the problem that the size of the double-shaft fiber-optic gyroscope cannot meet the high miniaturization demand of the control system in the prior art, and provides a miniaturized double-shaft fiber-optic gyroscope, which realizes the miniaturization of the double-shaft fiber-optic gyroscope through structural design optimization and layout, and meets the demand of the control system.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the utility model is as follows:

[0006] A miniaturized double-shaft fiber-optic gyroscope, comprising a base, a light source assembly, an optical path assembly and a signal acquisition and processing assembly.

[0007] The base is used for supporting the light source assembly, the optical path assembly and the signal acquisition and processing assembly, and the base is in the shape of a hollow cuboid and comprises a top wall, a bottom wall, a front wall, a rear wall, a left wall and a right wall.

[0008] The light source assembly comprises a light source driving board and an SLD light source, the light source driving board is accommodated in the base, and the SLD light source is embedded on the front wall of the base.

[0009] The optical path assembly comprises X-axis and Y-axis fiber-optic rings which are both boneless, a main coupler, X-axis and Y-axis couplers and X-axis and Y-axis waveguides, the X-axis and Y-axis fiber-optic rings are respectively embedded on the front wall and the right wall of the base, the main coupler, the X-axis and Y-axis couplers are embedded on the left wall and the rear wall of the base, and the X-axis and Y-axis waveguides are respectively embedded on the left wall and the rear wall of the base.

[0010] The signal acquisition and processing assembly comprises an X-axis detector and a Y-axis detector, a preamplifier circuit board for amplifying and processing signals acquired by the detectors, and a host circuit board for signal processing and output, the X-axis detector and the Y-axis detector are welded on the preamplifier circuit board through pins, the preamplifier circuit board is embedded on the bottom wall of the base, and the host circuit board is embedded on the top wall of the base.

[0011] Further, the optical fiber gyroscope has an outer dimension of 46mm*46mm*32mm.

[0012] Further, the optical fiber gyroscope further comprises a shell comprising a top plate, a bottom plate, a front plate, a rear plate, a left plate and a right plate, which are used for being connected to the top wall, the bottom wall, the front wall, the rear wall, the left wall and the right wall of the base respectively to enclose the base.

[0013] Further, the X-axis optical fiber ring and the Y-axis optical fiber ring are respectively bonded in the recesses of the front wall and the right wall of the base.

[0014] Further, the X-axis waveguide and the Y-axis waveguide are respectively bonded in the recesses of the left wall and the rear wall of the base.

[0015] Further, the main coupler and the X-axis coupler are adjacently installed in the long groove on the left wall of the base, and the Y-axis coupler is adjacently installed in the long groove on the rear wall of the base.

[0016] Further, the preamplifier circuit board and the host circuit board are respectively installed on the bosses on the bottom wall and the top wall of the base.

[0017] Further, the front wall of the base is provided with a light source line outlet for connecting the SLD light source with the light source driving board.

[0018] Further, the left wall and the rear wall of the base are respectively provided with waveguide line outlets for connecting the X-axis waveguide and the Y-axis waveguide with the host circuit board.

[0019] Further, the bottom wall of the base is provided with a preamplifier board line outlet for connecting the preamplifier circuit board with the host circuit board.

[0020] The utility model discloses the advantages are:

[0021] 1, the utility model discloses a miniaturization double -axis optical fiber gyroscope, through using the skeletonless optical fiber ring, and the arrangement structure of each electronic component of gyroscope on base is laid out optimization, makes each device's spatial layout reasonable, and the compact structure of gyroscope whole, small, can satisfy control system to the high demand of miniaturization.

[0022] 2, the size of the utility model discloses double -axis optical fiber gyroscope can reach 46mm*46mm*32mm, and the overall size is small, satisfies the demand of control system to the installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or other features and advantages of the present invention will become more easily understood through the following description with reference to the accompanying drawings, which are not drawn to scale and in which some features are exaggerated or reduced to show details of specific components. In the accompanying drawings:

[0024] Figure 1 This is a partially exploded perspective view of the miniaturized dual-axis fiber optic gyroscope of the present invention, in which the host circuit board is omitted;

[0025] Figure 2 It is a partially exploded perspective view of the miniaturized dual-axis fiber optic gyroscope of the present invention, showing the housing;

[0026] Figure 3 It is the three-dimensional base of the utility model. Figure 1 ;

[0027] Figure 4 It is the three-dimensional base of the utility model. Figure 2 .

[0028] In the figure: 1-base, 11-top wall, 111-boss of the top wall, 12-bottom wall, 121-boss of the bottom wall, 122-front plate line outlet, 123-external mounting hole, 13-front wall, 131-first recess of the front wall, 132-second recess of the front wall, 133-light source line outlet, 14-rear wall, 141-rear wall recess, 142-waveguide line outlet of the rear wall, 15-left wall, 151-rear wall recess, 152-long groove of the left wall, 153-waveguide line outlet of the left wall, 16-right wall, 161-right wall The recess, 17-internal boss, 18-connector outlet hole, 19-fiber transition hole; 21-light source driving board, 22-SLD light source; 31-X-axis fiber ring, 32-Y-axis fiber ring, 33-main coupler, 34-X-axis coupler, 35-Y-axis coupler, 36-X-axis waveguide, 37-Y-axis waveguide; 41-X-axis detector, 42-Y-axis detector, 43-front amplifier circuit board, 44-host circuit board; 5-housing, 51-top plate, 52-bottom plate, 53-front plate, 54-rear plate, 55-left plate, 56-right plate. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings by means of exemplary embodiments of the present invention. It should be noted that the following detailed description of the present invention is only for the purpose of illustration and is not intended to limit the present invention.

[0030] The utility model provides a kind of miniaturization double-shaft fiber gyroscope, by the reasonable selection to its component and the reasonable configuration of the space layout of device, the overall size of gyroscope is reduced, thereby meet the small volume space demand of control system to gyroscope.

[0031] First overall reference Figure 1 And Figure 2 As the miniaturization double-shaft fiber gyroscope of the utility model exemplary embodiment can include base 1, light source assembly, optical path assembly and signal acquisition processing assembly. Base 1 is used to support light source assembly, optical path assembly and signal acquisition processing assembly. Light source assembly includes light source drive board 21 and SLD light source 22;Optical path assembly includes X-axis optical fiber ring 31 and Y-axis optical fiber ring 32, main coupler 33 and X-axis coupler 34 and Y-axis coupler 35, X-axis waveguide 36 and Y-axis waveguide 37, for saving space, X-axis optical fiber ring 31 and Y-axis optical fiber ring 32 are all selected without skeleton optical fiber ring;Signal acquisition processing assembly includes X-axis detector 41 and Y-axis detector 42, preamplifier circuit board 43 for amplifying and processing the signal collected by detector, and host circuit board 44 for signal processing and output.

[0032] In combination Figure 3 And Figure 4 Base 1 is hollow cuboid, and includes top wall 11, bottom wall 12, front wall 13, rear wall 14, left wall 15 and right wall 16, these orientation terms are only for easy description, and not to limit the utility model. In order to make the structure of gyroscope compact, size is as small as possible, after design layout, these side walls are arranged with recess, long slot, boss, through hole or threaded hole etc. for installing the components contained in gyroscope, the mounting mode of each component on base will be described below.

[0033] Light source drive board 21 is contained in base 1, especially mounted on internal boss 17 inside base, threaded hole can be provided on internal boss 17, bolt can pass through light source drive board 21 and threaded hole on internal boss 17, so as to realize the connection of light source drive board 21 and base 1.

[0034] SLD light source 22 is embedded on the front wall 13 of the base 1, especially fixed in the second recess 132 of the base 1 by screws, and the second recess 132 can be machined with a threaded hole for fixing the SLD light source on its bottom surface. It should be understood that the SLD light source 22 is installed on the front wall 13 without protruding outside the front wall 13, so as to reduce the volume of the gyroscope. The same applies to the other walls of the base 1. In addition, the front wall 13 of the base 1 is provided with a light source line outlet 133 for connecting the SLD light source 22 with the light source drive board 21, to ensure the normal operation of the SLD light source 22.

[0035] The X-axis fiber ring 31 and the Y-axis fiber ring 32 are respectively embedded on the front wall 13 and the right wall 16 of the base 1, and can be accommodated in the first recess 131 of the front wall 13 and the recess 161 of the right wall 16. Optionally, the X-axis fiber ring 31 and the Y-axis fiber ring 32 are respectively bonded on the bottom surface of the corresponding recess, and can be bonded by epoxy glue. The bottom surface can be sandblasted to ensure the bonding strength of the fiber ring.

[0036] The main coupler 33, the X-axis coupler 34 and the Y-axis coupler 35 are embedded on the left wall 15 and the rear wall 14 of the base 1, and can be accommodated in the long groove formed on the left wall 15 and the rear wall 14. The X-axis waveguide 36 and the Y-axis waveguide 37 are respectively embedded on the left wall 15 and the rear wall 14 of the base 1, and can be accommodated in the recess formed on the left wall 15 and the rear wall 14. Preferably, the left wall 15 and the rear wall 14 of the base 1 are respectively provided with waveguide line outlets 142 and 153 for connecting the X-axis waveguide 36 and the Y-axis waveguide 37 with the main circuit board 44.

[0037] In some embodiments, the X-axis waveguide 36 and the Y-axis waveguide 37 are respectively bonded in the recess 151 of the left wall 15 and the recess 141 of the rear wall 14 of the base, and can be bonded at the bottom surface of the corresponding recess by silicone rubber GD414. In addition, the main coupler 33 and the X-axis coupler 34 can be installed in the long groove 152 on the left wall 15 of the base 1 adjacent to the X-axis waveguide 36, and the main coupler 33 is parallel to the X-axis coupler 34. The Y-axis coupler 35 can be installed in the long groove on the rear wall 14 of the base 1 adjacent to the Y-axis waveguide 37.

[0038] The X-axis detector 41 and the Y-axis detector 42 are respectively soldered on the preamplifier circuit board 43 by pins. The preamplifier circuit board 43 is embedded on the bottom wall 12 of the base 1, and can be installed on the four bosses 121 of the bottom wall 12 and fixed by screws. The main circuit board 44 is embedded on the top wall 11 of the base 1, and can be installed on the four bosses 111 of the top wall 11. The bottom wall 12 of the base 1 can be provided with a preamplifier board line outlet 122 for connecting the preamplifier circuit board 43 with the main circuit board 44. The bottom of the base 1 can be uniformly provided with a plurality of external mounting holes 123 in the form of threaded holes for connecting the housing 5 which will be described later.

[0039] One of the top wall 11, the bottom wall 12, the front wall 13, the rear wall 14, the left wall 15 and the right wall 16 of the base 1 is provided with a connector outlet hole 18 for connecting the fiber-optic gyroscope with an electrical interface. The base 1 can be provided with fiber-optic transition holes 19 on each side wall for tail fiber connection between the optical devices installed on each wall.

[0040] Referring back to Figure 2The dual-axis fiber-optic gyroscope of the utility model can also include a shell 5, the shell 5 includes a top plate 51, a bottom plate 52, a front plate 53, a rear plate 54, a left plate 55 and a right plate 56, and is used for being connected to the top wall 11, the bottom wall 12, the front wall 13, the rear wall 14, the left wall 15 and the right wall 16 of the base 1 respectively to enclose the base 1, thereby protecting the optical device on the base.

[0041] With the above arrangement structure, the size of the fiber-optic gyroscope of the utility model can be reduced to 46mm*46mm*32mm, the overall size is small, and the demand of the control system for the installation space is met.

[0042] Therefore, as described above, the miniaturized dual-axis fiber-optic gyroscope of the utility model uses the skeleton-free fiber ring, and the arrangement structure of each electronic component of the gyroscope on the base is optimized, so that the spatial arrangement of each component is reasonable, the overall structure of the gyroscope is compact and small in size, and the high demand of the control system for miniaturization can be met.

[0043] Finally, it should be noted that the features mentioned and / or shown in the above description of the exemplary embodiments of the utility model can be combined in the same or similar manner into one or more other embodiments, combined with or replaced by the corresponding features in other embodiments. The technical solutions obtained by combining or replacing should also be considered to be included in the protection scope of the utility model.

Claims

1. A miniaturized dual-axis fiber optic gyroscope, characterized by: Including base, light source assembly, optical path assembly and signal acquisition and processing assembly; The base is used to support the light source assembly, the optical path assembly and the signal acquisition and processing assembly. The base is in the shape of a hollow cuboid and includes a top wall, a bottom wall, a front wall, a rear wall, a left wall and a right wall; The light source assembly includes a light source driving board and an SLD light source, the light source driving board is accommodated in the base, and the SLD light source is embedded on the front wall of the base; The optical path assembly includes an X-axis optical fiber ring and a Y-axis optical fiber ring, both of which are skeleton-less optical fiber rings, a main coupler, an X-axis coupler, a Y-axis coupler, and an X-axis waveguide and a Y-axis waveguide. The X-axis optical fiber ring and the Y-axis optical fiber ring are respectively embedded in the front wall and the right wall of the base, the main coupler, the X-axis coupler, and the Y-axis coupler are embedded in the left wall and the rear wall of the base, and the X-axis waveguide and the Y-axis waveguide are respectively embedded in the left wall and the rear wall of the base. The signal acquisition and processing component includes an X-axis detector and a Y-axis detector, a preamplifier circuit board for amplifying the signals collected by the detectors, and a host circuit board for signal processing and output. The X-axis detector and the Y-axis detector are respectively soldered to the preamplifier circuit board through pins. The preamplifier circuit board is embedded in the bottom wall of the base, and the host circuit board is embedded in the top wall of the base.

2. The miniaturized dual-axis fiber optic gyroscope according to claim 1, wherein: The outer dimensions of the fiber optic gyroscope are 46 mm×46 mm×32 mm.

3. The miniaturized dual-axis fiber optic gyroscope according to claim 1 or 2, characterized in that: It also includes a shell, which includes a top plate, a bottom plate, a front plate, a rear plate, a left plate and a right plate, which are used to be connected to the top wall, bottom wall, front wall, rear wall, left wall and right wall of the base respectively to enclose the base.

4. The miniaturized dual-axis fiber optic gyroscope according to claim 1 or 2, characterized in that: The X-axis optical fiber ring and the Y-axis optical fiber ring are respectively bonded to the recessed portions of the front wall and the right wall of the base.

5. The miniaturized dual-axis fiber optic gyroscope according to claim 1 or 2, characterized in that: The X-axis waveguide and the Y-axis waveguide are respectively bonded to the recesses of the left wall and the rear wall of the base.

6. The miniaturized dual-axis fiber optic gyroscope according to claim 5, characterized in that: The main coupler and the X-axis coupler are installed adjacent to the X-axis waveguide in the long slot on the left wall of the base, and the Y-axis coupler is installed adjacent to the Y-axis waveguide in the long slot on the rear wall of the base.

7. The miniaturized dual-axis fiber optic gyroscope according to claim 1 or 2, characterized in that: The front-end circuit board and the host circuit board are respectively mounted on bosses on the bottom wall and the top wall of the base.

8. The miniaturized dual-axis fiber optic gyroscope according to claim 1 or 2, characterized in that: A light source line outlet is provided on the front wall of the base for connecting the SLD light source to the light source driving board.

9. The miniaturized dual-axis fiber optic gyroscope according to claim 1 or 2, characterized in that: Waveguide wire outlets are respectively provided on the left wall and the rear wall of the base, which are used to connect the X-axis waveguide and the Y-axis waveguide to the host circuit board respectively.

10. The miniaturized dual-axis fiber optic gyroscope according to claim 1 or 2, characterized in that: A front-amplifier board line outlet is provided on the bottom wall of the base, which is used to connect the front-amplifier circuit board with the host circuit board.

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