CN111412909A - Optical fiber gyroscope supporting framework and optical fiber gyroscope - Google Patents
Optical fiber gyroscope supporting framework and optical fiber gyroscope Download PDFInfo
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- CN111412909A CN111412909A CN202010418972.8A CN202010418972A CN111412909A CN 111412909 A CN111412909 A CN 111412909A CN 202010418972 A CN202010418972 A CN 202010418972A CN 111412909 A CN111412909 A CN 111412909A
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- ring
- buffer layer
- optical fiber
- expansion coefficient
- fiber optic
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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
- G01C19/722—Details of the mechanical construction
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- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The invention provides a supporting framework of a fiber-optic gyroscope, which comprises: the supporting ring is of a cylindrical structure, the order of magnitude of the radial expansion coefficient of the supporting ring is the same as that of the optical fiber ring, a flexible buffer layer is arranged on the outer circumferential side wall of the supporting ring, the order of magnitude of the radial expansion coefficient of the buffer layer is the same as that of the radial expansion coefficient of the supporting ring, and the order of magnitude of the axial expansion coefficient of the buffer layer is the same as that of the optical fiber ring. So set up, the expansion coefficient of buffer layer and the expansion coefficient of optic fibre ring differ less, and when the temperature variation, the deformation volume between support skeleton and the optic fibre ring differs less to can reduce the stress between support skeleton and the optic fibre ring, and the buffer layer has toughness, and the buffer layer is located as a transition between support ring and the optic fibre ring, can further cushion because optic fibre ring and the big and stress that introduces of support ring axial expansion coefficient difference.
Description
Technical Field
The invention relates to the technical field of optical fiber gyroscope gyros, in particular to an optical fiber gyroscope supporting framework and an optical fiber gyroscope.
Background
The optical fiber gyroscope is mainly used in military fields such as aviation, aerospace and land weapons as a mainstream inertial instrument in the field of inertial navigation. The fiber optic gyroscope is a core component of the fiber optic gyroscope and mainly comprises a support framework, a polarization maintaining fiber and curing glue, wherein the polarization maintaining fiber is wound on the support framework and is fixed by the curing glue, and the polarization maintaining fiber wound into a ring is called a fiber ring. In the prior art, the fiber optic gyroscope mostly adopts metal materials (such as aluminum alloy or titanium alloy) as a framework, a fiber optic ring is arranged on an annular supporting framework and is performed by curing glueThe optical fiber gyroscope is fixed and has better anti-seismic performance due to the supporting framework. However, there are also some drawbacks in that the expansion coefficient of the optical fiber ring is not generally matched to that of the supporting framework, for example, the expansion coefficient of the optical fiber ring is different radially and axially, and the axial expansion coefficient of the optical fiber ring is generally 10-4Order of magnitude, radial expansion coefficient of 10-5The axial expansion coefficient and the radial expansion coefficient of the aluminum alloy material are both approximately 2.5-3.0 × 10-5Which does not match the axial expansion coefficient of the fiber optic ring. When the temperature changes greatly, the deformation amount of the optical fiber ring and the supporting framework has a large difference, and because the optical fiber ring is fixedly connected with the supporting framework in an adhering manner, large stress can be generated between the optical fiber ring and the supporting framework, so that curing adhesive between the optical fiber ring and the supporting framework is cracked to destroy the symmetry of the optical fiber ring or cause large deformation of the optical fiber ring, and therefore variable-temperature zero-shift drift is introduced, and finally the precision of the optical fiber gyroscope is reduced. Therefore, how to solve the problem that the expansion coefficient of the supporting framework of the fiber-optic gyroscope in the prior art is not matched with the expansion coefficient of the fiber-optic ring needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a fiber optic gyroscope support framework capable of being matched with the expansion coefficient of a fiber optic ring and a fiber optic gyroscope.
In order to solve the above problems, the present invention provides a supporting framework of a fiber optic gyroscope, comprising: the supporting ring is used for mounting the optical fiber ring and is of a cylindrical structure, the order of magnitude of the radial expansion coefficient of the supporting ring is the same as that of the radial expansion coefficient of the optical fiber ring, a flexible buffer layer is arranged on the outer circumferential side wall of the supporting ring, the order of magnitude of the radial expansion coefficient of the buffer layer is the same as that of the radial expansion coefficient of the supporting ring, and the order of magnitude of the axial expansion coefficient of the buffer layer is the same as that of the axial expansion coefficient of the optical fiber ring.
Preferably, the support ring is a stainless steel support ring.
Preferably, the buffer layer is an epoxy buffer layer.
Preferably, the buffer layer is a silicone rubber buffer layer.
Preferably, the buffer layer is a carbon fiber composite buffer layer.
Preferably, the outer circumferential surface of the support ring is provided with an anti-slip structure.
Preferably, the buffer layer is connected with the support ring by bonding.
Preferably, the anti-slip structure is an anti-slip pattern.
The invention also provides an optical fiber gyroscope, which comprises an optical fiber gyroscope supporting framework and an optical fiber ring, wherein the optical fiber gyroscope supporting framework is the optical fiber gyroscope supporting framework, and the optical fiber ring is sleeved on the buffer layer.
Preferably, the optical fiber ring is bonded to the buffer layer by a cured adhesive.
In the technical scheme provided by the invention, the optical fiber gyroscope supporting framework comprises: the supporting ring is used for mounting the optical fiber ring and is of a cylindrical structure, the order of magnitude of the radial expansion coefficient of the supporting ring is the same as that of the radial expansion coefficient of the optical fiber ring, a flexible buffer layer is arranged on the outer circumferential side wall of the supporting ring, the order of magnitude of the radial expansion coefficient of the buffer layer is the same as that of the radial expansion coefficient of the supporting ring, and the order of magnitude of the axial expansion coefficient of the buffer layer is the same as that of the axial expansion coefficient of the optical fiber ring. Compared with the prior art that the support ring and the optical fiber ring have an order of magnitude difference, the optical fiber gyroscope support framework has the advantages that the axial expansion coefficient and the radial expansion coefficient of the buffer layer are respectively the same as the order of magnitude of the axial expansion coefficient and the radial expansion coefficient of the optical fiber ring, namely the expansion coefficient of the buffer layer has a smaller difference with the expansion coefficient of the optical fiber ring, when the temperature changes, the deformation amount difference between the support framework and the optical fiber ring is smaller, so that the stress between the support framework and the optical fiber ring can be reduced, the buffer layer has toughness, the buffer layer is positioned between the support ring and the optical fiber ring to serve as a transition, namely, an elastic cushion is added in front of the support ring and the optical fiber ring, the buffer layer is stretched when the support ring deforms greatly, the buffer layer deforms, the optical fiber ring cannot be directly hard-pulled, and the stress caused, therefore, the problem that in the prior art, due to temperature change, stress can be generated between the optical fiber ring and the supporting framework, so that curing glue between the optical fiber ring and the supporting framework is cracked to damage the symmetry of the optical fiber ring or cause the optical fiber ring to generate large deformation, temperature-changing zero-bias drift is introduced, and finally the precision of the optical fiber gyroscope is reduced is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a supporting framework of a fiber-optic gyroscope according to an embodiment of the invention.
In fig. 1:
1. a support ring; 2. a buffer layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The embodiment provides a fiber-optic gyroscope supporting framework capable of being matched with the expansion coefficient of a fiber-optic ring and a fiber-optic gyroscope.
Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the invention recited in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1, the supporting framework of the fiber optic gyroscope provided by the embodiment of the invention comprises a supporting ring 1 for mounting a fiber optic ring, the supporting ring 1 is of a cylindrical structure as a whole, and the radial expansion coefficient of the supporting ring 1 is the same as the radial expansion coefficient of the fiber optic ring in order, optionally, the supporting ring 1 is a stainless steel supporting ring 1, and the measured radial expansion coefficient of the fiber optic ring is about 1.2-1.4 × 10-5The stainless steel support ring 1 has a measured radial expansion coefficient of 1.44 × 10-5～1.60×10-5The radial expansion coefficient of the optical fiber ring is the same as the radial expansion coefficient of the optical fiber ring, and the difference between the base numbers of the two expansion coefficients is small. The outer circumferential side wall of the support ring 1 is provided with a layer of flexible buffer layer 2, the order of magnitude of the radial expansion coefficient of the buffer layer 2 is the same as that of the support ring 1, and the order of magnitude of the axial expansion coefficient of the buffer layer 2 is the same as that of the optical fiber ring.
Compared with the prior art that the support ring 1 and the optical fiber ring have an order of magnitude difference, the optical fiber gyroscope support framework has the advantages that the axial expansion coefficient and the radial expansion coefficient of the buffer layer 2 are respectively the same as the axial expansion coefficient and the radial expansion coefficient of the optical fiber ring, namely the expansion coefficient of the buffer layer 2 has a smaller difference with the expansion coefficient of the optical fiber ring, so that the difference of the deformation amount between the support framework and the optical fiber ring is smaller when the temperature changes, the stress between the support framework and the optical fiber ring can be reduced, the buffer layer 2 has toughness, the buffer layer 2 is positioned between the support ring 1 and the optical fiber ring to form a transition, namely, an elastic pad is added in front of the support ring and the optical fiber ring, the buffer layer is stretched when the deformation of the support ring is larger, the buffer layer is deformed, the optical fiber ring cannot be directly hard-pulled, and the stress caused by the large difference, therefore, the problem that in the prior art, due to temperature change, stress can be generated between the optical fiber ring and the supporting framework, so that curing glue between the optical fiber ring and the supporting framework is cracked to damage the symmetry of the optical fiber ring or cause the optical fiber ring to generate large deformation, temperature-changing zero-bias drift is introduced, and finally the precision of the optical fiber gyroscope is reduced is solved.
In some embodiments, buffer layer 2 is an epoxy buffer layer, or buffer layer 2 is a silicon rubber buffer layer, or buffer layer 2 is a carbon fiber composite buffer layer. The following table shows the measured expansion coefficients of the epoxy resin buffer layer, the silicone rubber buffer layer and the carbon fiber composite material buffer layer.
The data in the table can show that the radial expansion coefficient and the axial expansion coefficient of the buffer layer 2 made of the epoxy resin, the silicon rubber and the carbon fiber composite material can be well matched with the radial expansion coefficient and the axial expansion coefficient of the optical fiber ring, so that the effect of reducing the temperature stress between the optical fiber ring and the optical fiber gyroscope supporting framework can be achieved. It should be noted that epoxy resin, silicone rubber and carbon fiber composite material are all materials in the prior art.
In some embodiments, the cushioning layer 2 is attached to the support ring 1 by bonding. Specifically, when the buffer layer 2 is mounted on the support ring 1, the support ring 1 may be fixed and then bonded to the buffer layer 2 at a high temperature (100 ℃ or higher). However, due to the reasons of uneven shrinkage and solidification of the glue and the like, the outer circumferential surface of the buffer layer 2 may become extremely irregular, the cylindricity of the outer circle of the support framework after the glue coating cannot meet the precision requirement of winding the optical fiber ring, the support framework needs to be subjected to complementary processing, a numerical control milling machine tool can be adopted, the support framework is clamped on a three-jaw chuck, the circle center of the inner circle of the support ring 1 is found out through a laser measuring probe, and then the outer circle is subjected to interpolation processing to the required processing precision.
In some embodiments, in order to increase the friction force between the buffer layer 2 and the support ring 1 and prevent the buffer layer 2 from falling off from the support ring 1, the outer circumferential surface of the support ring 1 is provided with an anti-slip structure. For example, the anti-slip structure may be an anti-slip pattern formed by knurling.
The embodiment of the invention also provides the optical fiber gyroscope, which comprises an optical fiber gyroscope supporting framework and an optical fiber ring, wherein the optical fiber gyroscope supporting framework is the optical fiber gyroscope supporting framework in any one embodiment, and the optical fiber ring is sleeved on the buffer layer 2. In particular, the ring of optical fibers is glued to the buffer layer 2 by means of a cured glue. The optical fiber gyroscope has the advantages by adopting the optical fiber gyroscope supporting framework, so the advantages of the optical fiber gyroscope are not described again.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A fiber optic gyroscope support frame, comprising: the supporting ring (1) is used for mounting the optical fiber ring and is of a cylindrical structure, the order of magnitude of the radial expansion coefficient of the supporting ring (1) is the same as that of the optical fiber ring, a layer of buffer layer (2) with toughness is arranged on the outer circumferential side wall of the supporting ring (1), the order of magnitude of the radial expansion coefficient of the buffer layer (2) is the same as that of the radial expansion coefficient of the supporting ring (1), and the order of magnitude of the axial expansion coefficient of the buffer layer (2) is the same as that of the axial expansion coefficient of the optical fiber ring.
2. The fiber optic gyroscope support backbone of claim 1, characterized in that the support ring (1) is a stainless steel support ring (1).
3. A fiber optic gyroscope support frame according to claim 2, characterized in that the buffer layer (2) is an epoxy buffer layer.
4. A fiber optic gyroscope support frame according to claim 2, characterized in that the buffer layer (2) is a silicone rubber buffer layer.
5. The fiber optic gyroscope support backbone of claim 2, characterized in that the buffer layer (2) is a carbon fiber composite buffer layer.
6. The fiber optic gyroscope support frame according to claim 1, characterized in that the outer circumferential surface of the support ring (1) is provided with an anti-slip structure.
7. A fiber optic gyroscope support frame according to claim 1, characterized in that the buffer layer (2) is connected to the support ring (1) by gluing.
8. The fiber optic gyroscope support backbone of claim 6, wherein the anti-slip structure is an anti-slip texture.
9. A fiber optic gyroscope, comprising a fiber optic gyroscope support frame and a fiber optic ring, wherein the fiber optic gyroscope support frame is the fiber optic gyroscope support frame according to any one of claims 1 to 8, and the fiber optic ring is sleeved on the buffer layer (2).
10. A fiber optic gyroscope according to claim 9, characterized in that the fiber ring is glued to the buffer layer (2) by means of a cured glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010418972.8A CN111412909A (en) | 2020-05-18 | 2020-05-18 | Optical fiber gyroscope supporting framework and optical fiber gyroscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010418972.8A CN111412909A (en) | 2020-05-18 | 2020-05-18 | Optical fiber gyroscope supporting framework and optical fiber gyroscope |
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| CN111412909A true CN111412909A (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010418972.8A Pending CN111412909A (en) | 2020-05-18 | 2020-05-18 | Optical fiber gyroscope supporting framework and optical fiber gyroscope |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136302A (en) * | 2021-11-26 | 2022-03-04 | 重庆华渝电气集团有限公司 | Optical fiber ring capable of improving zero-bias symmetry in optical fiber gyroscope and testing and evaluating method thereof |
| CN115855120A (en) * | 2023-02-27 | 2023-03-28 | 中国船舶集团有限公司第七〇七研究所 | Optical fiber coil, manufacturing method thereof and optical fiber gyroscope |
| CN116045955A (en) * | 2023-03-31 | 2023-05-02 | 中国船舶集团有限公司第七〇七研究所 | Optical fiber ring and optical fiber gyro for reducing temperature rise expansion stress based on intermediate layer |
-
2020
- 2020-05-18 CN CN202010418972.8A patent/CN111412909A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136302A (en) * | 2021-11-26 | 2022-03-04 | 重庆华渝电气集团有限公司 | Optical fiber ring capable of improving zero-bias symmetry in optical fiber gyroscope and testing and evaluating method thereof |
| CN115855120A (en) * | 2023-02-27 | 2023-03-28 | 中国船舶集团有限公司第七〇七研究所 | Optical fiber coil, manufacturing method thereof and optical fiber gyroscope |
| CN116045955A (en) * | 2023-03-31 | 2023-05-02 | 中国船舶集团有限公司第七〇七研究所 | Optical fiber ring and optical fiber gyro for reducing temperature rise expansion stress based on intermediate layer |
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