CN110879061A - Damp-proof and vibration-proof off-skeleton fiber optic gyroscope - Google Patents
Damp-proof and vibration-proof off-skeleton fiber optic gyroscope Download PDFInfo
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- CN110879061A CN110879061A CN201911268871.0A CN201911268871A CN110879061A CN 110879061 A CN110879061 A CN 110879061A CN 201911268871 A CN201911268871 A CN 201911268871A CN 110879061 A CN110879061 A CN 110879061A
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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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- 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
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Abstract
The invention provides a moisture-proof and vibration-proof off-skeleton fiber optic gyroscope, which solves the problems of low fiber ring sealing property and poor vibration of the existing off-skeleton fiber optic gyroscope. The gyroscope comprises a gyroscope table body, a fiber ring module and an insulating rubber annular pad; the optical fiber ring module is arranged on the gyroscope table body, and a gap exists between the optical fiber ring module and the gyroscope table body; the insulating rubber annular pad is arranged at the gap; the optical fiber ring module comprises an optical fiber ring installation framework, an annular cover plate, a protective sleeve and an optical fiber ring; the optical fiber ring installation framework comprises an installation framework inner cylinder, an installation framework outer cylinder and an annular bottom plate, and an annular sealing cavity is formed by the optical fiber ring installation framework and the annular cover plate; the optical fiber ring is adhered in the annular sealing cavity through an adhesive, and a protective sleeve is sleeved on a tail fiber of the optical fiber ring and led out from the fiber passing channel to be connected with a tail fiber of an optical device on the gyroscope body; and sealant is filled in gaps between the tail fibers and the protective sleeve, between the protective sleeve and the annular cover plate, and between the protective sleeve and the inner cylinder of the mounting framework.
Description
Technical Field
The invention belongs to the field of fiber optic gyroscopes, and particularly relates to a moisture-proof and vibration-proof off-skeleton fiber optic gyroscope.
Background
The fiber-optic gyroscope has the advantages of high sensitivity, long service life, large dynamic range, short starting time and the like, and is widely applied to an inertial navigation system.
The deassemplated fiber optic gyroscope is a new fiber optic gyroscope produced in recent years, and the gyroscope is generally composed of a combination of a fiber optic ring module, a digital demodulation circuit, a light source driving circuit, an SLD light source, a 1 × 2 coupler and a PIN-FET component. The optical fiber ring module comprises an optical fiber ring, wherein the optical fiber ring is a core component of the optical fiber gyroscope and is used for sensing Sagnac (Sagnac) phase difference between two oppositely propagating light waves caused by input angular velocity. The external environment air pressure change, water vapor and salt fog all influence the performance of the optical fiber ring, and further influence the precision, reliability and long-term stability of the optical fiber gyroscope.
The sealing performance of the optical fiber ring is particularly important, the sealing performance of the traditional optical fiber ring mainly depends on the sealing performance of an optical fiber inertial measurement unit, the optical fiber inertial measurement unit usually adopts a static sealing structure with an O-shaped sealing rubber strip, but the optical fiber inertial measurement unit cannot perform good sealing on the optical fiber ring due to the fact that the optical fiber inertial measurement unit is complex in structure, multiple in external interface, large in size and difficult to achieve good air tightness, and further the environmental adaptability and long-term repeatability of the optical fiber gyroscope are influenced.
In addition, the problem of the out-of-tolerance of the vibration index of the off-skeleton fiber-optic gyroscope is one of the factors which beset the wide application of the gyroscope. At present, no better method exists for solving the problem, so that the off-skeleton fiber-optic gyroscope, especially the high-precision off-skeleton fiber-optic gyroscope, is only limited to be applied under the working condition of small-magnitude vibration.
Disclosure of Invention
The invention provides a moisture-proof and vibration-proof off-skeleton fiber optic gyroscope, aiming at solving the technical problems of low fiber ring sealing performance and poor vibration of the existing off-skeleton fiber optic gyroscope.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a moisture-proof and vibration-proof off-frame fiber optic gyroscope is characterized in that: the gyroscope comprises a gyroscope body, a fiber ring module and an insulating rubber annular pad; the optical fiber ring module is arranged on the gyroscope body, and a gap is formed between the optical fiber ring module and the gyroscope body; the insulating rubber annular pad is arranged at the gap, and the thickness of the insulating rubber annular pad is larger than the axial size of the gap;
the optical fiber ring module comprises an optical fiber ring mounting framework, an annular cover plate, a protective sleeve and an optical fiber ring;
the optical fiber ring installation framework comprises an installation framework inner cylinder, an installation framework outer cylinder and an annular bottom plate;
the mounting framework inner cylinder and the mounting framework outer cylinder are coaxially arranged, one end of each mounting framework inner cylinder and one end of each mounting framework outer cylinder are provided with the annular cover plate, and the other end of each mounting framework inner cylinder and the other end of each mounting framework outer cylinder are provided with the annular bottom plate; thereby forming an annular sealing cavity among the inner installation framework cylinder, the outer installation framework cylinder, the annular cover plate and the annular bottom plate;
the wall of the inner cylinder of the mounting framework is provided with a fiber passing channel which is used for communicating the annular sealing cavity with the outside;
the optical fiber ring is arranged in the annular sealing cavity, and a protective sleeve is sleeved on a tail fiber of the optical fiber ring and led out from the fiber passing channel to be connected with a tail fiber of an optical device on the gyroscope body;
the optical fiber ring is bonded in the annular sealing cavity through an adhesive; (ii) a
Sealant is filled in gaps between the tail fiber and the protective sleeve, between the protective sleeve and the annular cover plate and between the protective sleeve and the inner cylinder of the installation framework;
and the optical fiber at the outlet of the protective sleeve is fixed on the gyro table body through an adhesive after being fused with the tail fiber of the optical device on the gyro table body.
Further, the gap is 0.5 mm; the thickness of the insulating rubber annular pad is 0.7 mm.
Further, the adhesive is 353ND glue.
Furthermore, one end of the inner cylinder of the mounting framework, which is close to the annular cover plate, is provided with an annular folded edge bent towards the center; the bent part is provided with an annular gap matched with the inner side of the annular cover plate;
the fiber passing channel is arranged on the annular folded edge;
at least three first mounting holes are uniformly formed in the annular folded edge along the circumferential direction of the annular folded edge and are used for being connected with the gyro table body.
Further, the sealant comprises silicon rubber, light-cured rubber and epoxy rubber;
the silicon rubber is filled in the opening part at one side of the fiber passing channel communicated with the annular sealing cavity;
the light-cured adhesive is filled in a gap between the tail fiber and the protective sleeve;
the epoxy glue is filled in gaps among the protective sleeve, the annular cover plate and the mounting framework inner cylinder, and is filled in two arc-shaped gaps among the annular cover plate and the mounting framework inner cylinder, and the two arc-shaped gaps are distributed on two sides of the fiber passing channel.
Furthermore, laser welding is carried out between the annular cover plate and the outer cylinder of the mounting framework; the gaps between the annular cover plate and the annular gap except the arc-shaped gap are formed by laser welding.
Furthermore, the installation framework inner cylinder, the installation framework outer cylinder and the annular bottom plate are of an integral structure.
Furthermore, a fiber guide groove for accommodating the protective sleeve is arranged on the gyro body.
Compared with the prior art, the invention has the advantages that:
1. in the fiber optic gyroscope, an optical fiber ring is arranged in an annular sealing cavity formed by an annular cover plate and an optical fiber ring installation framework, a tail fiber of the optical fiber ring extends into a protective sleeve and is led out through a fiber channel, and sealing glue is filled in gaps between the tail fiber and the protective sleeve, between the protective sleeve and the annular cover plate and between the protective sleeve and an inner cylinder of the installation framework; thereby achieving sealing of the fiber ring; the optical fiber ring in the optical fiber ring module is independently sealed, the performance of the optical fiber ring is prevented from being influenced by external environment air pressure change, water vapor, salt mist and the like, the sealing performance of the optical fiber ring can be effectively improved, and the environmental adaptability and the long-term repeatability of the optical fiber gyroscope are further improved;
in the fiber-optic gyroscope, a gap (cantilever) is reserved between the gyroscope table body and the fiber-optic ring module and used for isolating the heat conduction effect, the thickness of the insulating rubber annular pad is designed to be larger than the size of the gap, and due to the existence of the cantilever, the heat of the gyroscope table body cannot be transferred into the fiber-optic ring in a conduction mode, so that the temperature performance of the gyroscope is improved; the cantilever is filled by an insulating rubber annular pad with the thickness larger than that of the cantilever, so that the buffer effect is achieved during vibration, and vibration errors caused by the cantilever are reduced; the optical fiber ring is bonded in the annular sealing cavity through the adhesive, so that the optical fiber ring is reliably fixed in the sealing cavity, the optical fiber ring tail fiber and the optical device tail fiber are protected through the protective sleeve after being welded, and the protective sleeve is fixed on the gyroscope table body through the adhesive, so that the vibration performance of the optical fiber gyroscope is improved.
2. The optical fiber ring uses three kinds of sealing gum, the optical curing gum fills the protective sleeve, and the silicon rubber is not easy to flow and is a flexible material, so that the silicon rubber is used for protecting the protective sleeve on one hand, and can be used for blocking a communication port between the fiber channel and the annular sealing cavity on the other hand, so that the phenomenon that the easy-flowing epoxy gum flows into the annular sealing cavity to influence the performance of the optical fiber ring is prevented; and because the epoxy glue has good adhesion, other gaps are finally adhered and sealed through the epoxy glue, and the sealing performance of the optical fiber ring module can be effectively improved.
3. The adhesive between the optical fiber ring and the inner wall of the optical fiber ring mounting framework is 353ND glue, and the adhesive strength is good.
4. According to the invention, the annular folded edge bent towards the center of the inner cylinder of the mounting framework is arranged at one end of the inner cylinder of the mounting framework, and the fiber passing channel is arranged on the annular folded edge, so that on one hand, the strength of the inner cylinder of the mounting framework can be increased by the annular folded edge; in the second aspect, the fiber passing channel is arranged on the annular folded edge, so that the tail fiber with the protective sleeve in the fiber passing channel is more stable; and the third annular folded edge is provided with a mounting hole, so that the optical fiber ring module is more conveniently connected with the gyroscope table body.
5. In the invention, laser welding is carried out between the annular cover plate and the optical fiber ring mounting framework except for two arc-shaped gaps at two sides of the fiber channel, so that the connection and sealing of the annular cover plate and the optical fiber ring mounting framework are more reliable by the laser welding; two arc gaps are reserved during welding, so that the optical fiber is prevented from being damaged by laser.
Drawings
FIG. 1 is a schematic structural view of a deassembing fiber optic gyroscope according to the present invention;
FIG. 2 is a bottom view of a fiber ring module of a deboned fiber optic gyroscope of the present invention;
FIG. 3 is a top view of a fiber optic ring module in a split-frame fiber optic gyroscope according to the present invention;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a schematic diagram of a composite structure of a fiber ring and a fiber ring module in the off-frame fiber optic gyroscope according to the present invention;
FIG. 6 is an enlarged view at A in FIG. 5;
FIG. 7 is a schematic diagram of the structure of an annular cover plate in a de-bone fiber optic gyroscope according to the present invention;
FIG. 8 is a schematic diagram of a fiber optic ring in a split-frame fiber optic gyroscope according to the present invention;
FIG. 9 is a schematic view of the protective sleeve of the off-frame fiber optic gyroscope of the present invention;
FIG. 10 is a top view of FIG. 1;
FIG. 11 is a schematic illustration of the assembly process of a split-frame fiber optic gyroscope according to the present invention;
FIG. 12 is a graphical representation of a random vibration test spectrum of a deboned fiber optic gyroscope according to the present invention;
wherein the reference numbers are as follows:
01-gyroscope table body, 02-optical fiber ring module, 03-insulating rubber annular pad, 1-optical fiber ring installation framework, 11-installation framework inner cylinder, 12-installation framework outer cylinder, 13-annular bottom plate, 14-annular folding edge, 141-annular gap, 16-installation hole, 2-annular cover plate, 3-protective sleeve, 4-optical fiber ring, 41-tail fiber, 5-annular sealing cavity, 51-epoxy glue, 6-fiber passing channel, 7-353ND glue and 8-optical device.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1 to 10, a fiber optic gyroscope with a framework removed comprises a gyroscope table body 01, a fiber optic ring module 02 and an insulating rubber annular pad 03; the optical fiber ring module 02 is arranged on the gyro table body 01, a gap exists between the optical fiber ring module 02 and the gyro table body 01, and the optical fiber ring module 02 is connected with the gyro table body 01 through screws; the insulating rubber annular pad 03 is arranged at the gap, and the thickness of the insulating rubber annular pad 03 is larger than the axial dimension of the gap. The gap between the gyro platform body 01 and the optical fiber ring module 02 is 0.5mm (cantilever), the thickness of the insulating rubber annular pad 03 is 0.7mm, the 0.7mm insulating rubber annular pad 03 is filled in the gap of 0.5mm, and due to the existence of the cantilever, the heat of the platform body cannot be transmitted into the optical fiber ring in a conduction mode, so that the temperature performance of the gyro is improved; the cantilever is filled by the insulating rubber pad with the thickness larger than that of the cantilever, so that the buffer effect is achieved during vibration, and vibration errors caused by the cantilever are reduced.
The optical fiber ring module 02 comprises an optical fiber ring installation framework 1, an annular cover plate 2, a protective sleeve 3 and an optical fiber ring 4; the optical fiber ring installation framework 1 comprises an installation framework inner cylinder 11, an installation framework outer cylinder 12 and an annular bottom plate 13; the annular bottom plate 13 is arranged at one end of the mounting framework inner cylinder 11 and one end of the mounting framework outer cylinder 12 to form a U-shaped groove, the mounting framework inner cylinder 11, the mounting framework outer cylinder 12 and the annular bottom plate 13 are of an integral structure, and the annular bottom plate 13 is arranged at an opening of the end face of the U-shaped groove, so that an annular sealing cavity 5 is formed among the mounting framework inner cylinder 11, the mounting framework outer cylinder 12, the annular cover plate 2 and the annular bottom plate 13; the other end of the mounting framework inner cylinder 11 is provided with an annular folded edge 14 which is bent towards the center of the mounting framework inner cylinder, the bent part of the mounting framework inner cylinder is provided with an annular notch 141 which is matched with the inner side of the annular cover plate 2, the annular folded edge 14 is provided with a fiber channel 6, and the annular folded edge 14 is uniformly provided with at least three mounting holes 16 along the circumferential direction of the annular folded edge so that the optical fiber ring module 02 is fixed with the gyroscope body; the optical device 8 is fixed on the top table body 01, a fiber guide groove is arranged on the top table body 01, the tail fiber of the optical device 8 is arranged in the fiber guide groove and is sealed and fixed by glue, and meanwhile, the optical fiber outside the outlet of the protective sleeve 3 is fixed on the fiber guide groove on the top table body 01 through adhesive after being welded with the tail fiber of the optical device 8 on the top table body 01.
The inner side of the annular cover plate 2 and the annular gap 141 are welded by laser, and two arc-shaped gaps at two sides of the fiber passing channel 6 are reserved without welding, so that the optical fiber is prevented from being damaged; the outer side of the annular cover plate 2 is welded with the other end of the mounting framework outer cylinder 12 by laser; therefore, an annular sealing cavity 5 is formed between the annular cover plate 2 and the optical fiber ring mounting framework 1; the fiber passing channel 6 enables the annular sealing cavity 5 to be communicated with the outside; the optical fiber ring 4 is bonded in the annular sealing cavity 5 through epoxy glue 51, and a protective sleeve 3 is sleeved on a tail fiber 41 of the optical fiber ring 4 and led out from the fiber passing channel 6 to be connected with a tail fiber of an optical device 8; filling light-curing glue in the gap between the tail fiber 41 and the protective sleeve 3; the fiber passing channel 6 is filled with silicon rubber at the opening part at one side communicated with the annular sealing cavity 5, and the epoxy glue 51 is filled in the gaps between the protective sleeve 3 and the annular cover plate 2 and the mounting framework inner cylinder 11 and is filled in the two arc-shaped gaps between the annular cover plate 2 and the mounting framework inner cylinder 11. Thereby achieving a seal against the fiber ring.
An adhesive is arranged between the optical fiber ring 4 and the inner wall of the optical fiber ring mounting framework 1, and is preferably bonded by 353ND glue 7, so that the bonding strength is enhanced. The protective sleeve 3 is fixed on the optical device 8 through an adhesive, so that the tail fiber of the optical fiber ring 4 is reliably fixed on the optical device 8, and the vibration performance of the optical fiber gyroscope is improved. High-strength glue is adopted during the bonding of the optical fiber ring, the distance between the glue and the root of the tail fiber is shortened during the treatment of the tail fiber of the optical device 8, a sealing rubber pad which is larger than a gap is added between the optical fiber ring mounting framework and the gyro platform body 01, and comprehensive measures are taken to improve the vibration effect of the off-framework optical fiber gyro.
As shown in fig. 11, the specific assembling steps of the skeleton-removed fiber-optic gyroscope of this embodiment are as follows:
step 1) enabling a tail fiber 41 of an optical fiber ring 4 to penetrate through a protective sleeve 3, and injecting light-curing glue into the protective sleeve 4 for curing and sealing;
step 2), bonding the optical fiber ring 4 on the annular bottom plate 13 of the optical fiber ring framework 1 through 353ND glue, and leading the tail fiber 41 with the protective sleeve 3 out of the fiber passing channel 6;
step 3) covering the annular cover plate 2 at the opening of the optical fiber ring framework 1, performing laser welding on the whole ring between the outer side of the annular cover plate 2 and the outer cylinder 12 of the installation framework, and performing laser welding on the gaps between the inner side of the annular cover plate 2 and the annular gap 141 except for arc-shaped gaps at two sides of the fiber passing channel 6;
step 4) coating silicon rubber in the fiber passing channel 6, and plugging a communication port of the fiber passing channel 6 and the annular sealing cavity 5 by the silicon rubber;
and step 5) coating epoxy glue in gaps among the protective sleeve 3, the annular cover plate 2 and the framework inner cylinder 11, and coating epoxy glue in two arc-shaped gaps between the inner side of the annular cover plate 2 and the annular notch 141 to finish the assembly of the optical fiber ring module.
Step 6), additionally arranging an insulating rubber annular pad on the gyro platform body, and tightly mounting the optical fiber ring module and the gyro platform body;
and 7) after the optical fiber ring and the optical device tail fiber are welded, the optical fiber ring is adhered to the gyroscope table body through an adhesive, and the assembly of the optical fiber gyroscope is completed.
The tightness detection needs to be performed on the assembled optical fiber ring module, and the tightness detection is performed on the optical fiber ring module by using a helium mass spectrum backpressure leak detection method in the embodiment, which specifically comprises the following steps:
firstly, putting the optical fiber ring module into a vacuum pressure box, vacuumizing the vacuum pressure box, and keeping for 1h after vacuumizing is finished; then filling high-pressure helium into the vacuum pressure tank under the vacuum condition, and if leak holes exist at the welding seam or the glue injection and gluing positions of the optical fiber ring framework and the cover plate, the helium enters an annular sealing cavity formed by the optical fiber ring framework and the annular cover plate through the leak holes; taking the optical fiber ring module out of the vacuum pressure tank after maintaining the pressure for 1h, standing in the air for 5 h-6 h, and allowing helium to completely diffuse from the outer surface of the optical fiber ring module until no helium exists on the outer surface; and then putting the fiber ring module pressed with helium into a leak detection box, vacuumizing the leak detection box by using a helium mass spectrometer leak detector, and testing the leak rate.
If the leakage rate meets the design requirement, the sealing performance of the optical fiber ring module is good; and if the leakage rate does not meet the design requirement, rechecking the laser welding seam and the positions for injecting and gluing, rechecking the positions of the leakage holes or the positions where the leakage holes possibly exist, carrying out glue injection and gluing sealing, and carrying out the repeated leakage detection method after sealing until the leakage rate meets the design requirement.
Meanwhile, a vibration resistance comparison test is carried out on the assembled fiber-optic gyroscope;
the test conditions are as follows: the random vibration acceptance test conditions are shown in table 1 below, and the data are shown in table 2.
TABLE 1 random vibration acceptance test conditions
TABLE 2 vibration test data
| Axial direction | Front (1s) | Middle (1s) | Rear (1s) | Variation of bias value |
| Bias value (·/h) | Bias value (·/h) | Bias value (·/h) | <0.2(·/h) | |
| X | -11.9646 | -12.059 | -11.9391 | 0.107 |
| Y | 9.1993 | 9.3445 | 9.1612 | 0.1642 |
| Z | 8.5424 | 8.4453 | 8.494 | 0.0729 |
From the vibration spectrum pattern of fig. 12, and tables 1 and 2, the vibration index of the off-frame fiber optic gyroscope provided in this embodiment can be derived: the deviation value changes are all less than 0.2 (DEG/h), and the index requirements are met.
The above description is only for the purpose of describing the preferred embodiments of the present invention and does not limit the technical solutions of the present invention, and any known modifications made by those skilled in the art based on the main technical concepts of the present invention fall within the technical scope of the present invention.
Claims (8)
1. A moisture-proof and vibration-proof off-frame fiber-optic gyroscope is characterized in that: comprises a gyroscope body (01), a fiber ring module (02) and an insulating rubber annular pad (03);
the optical fiber ring module (02) is arranged on the gyroscope table body (01), and a gap is formed between the optical fiber ring module and the gyroscope table body;
the insulating rubber annular pad (03) is arranged at the gap, and the thickness of the insulating rubber annular pad 03 is larger than the axial dimension of the gap;
the optical fiber ring module (02) comprises an optical fiber ring mounting framework (1), an annular cover plate (2), a protective sleeve (3) and an optical fiber ring (4);
the optical fiber ring mounting framework (1) comprises a mounting framework inner cylinder (11), a mounting framework outer cylinder (12) and an annular bottom plate (13);
the mounting framework inner cylinder (11) and the mounting framework outer cylinder (12) are coaxially arranged, one end of each mounting framework inner cylinder and one end of each mounting framework outer cylinder are provided with the annular cover plate (2), and the other end of each mounting framework inner cylinder and the other mounting framework outer cylinder are provided with the annular bottom plate (13); thereby forming an annular sealing cavity (5) among the installation framework inner cylinder (11), the installation framework outer cylinder (12), the annular cover plate (2) and the annular bottom plate (13);
the wall of the inner cylinder (11) of the mounting framework is provided with a fiber passing channel (6) which is used for communicating the annular sealing cavity (5) with the outside;
the optical fiber ring (4) is arranged in the annular sealing cavity (5), and a protective sleeve (3) is sleeved on a tail fiber (41) of the optical fiber ring (4) and led out from the fiber passing channel (6) to be connected with a tail fiber of an optical device on the gyroscope body (01);
the optical fiber ring (4) is bonded in the annular sealing cavity (5) through an adhesive;
sealing glue is filled in gaps between the tail fiber (41) and the protective sleeve (3), between the protective sleeve (3) and the annular cover plate (2) and between the protective sleeve (3) and the inner barrel (11) of the installation framework;
and the optical fiber outside the outlet of the protective sleeve (3) is fused with the tail fiber of the optical device (8) on the gyro table body (01) and then is fixed on the gyro table body (01) through an adhesive.
2. The moisture resistant, vibration resistant, off-bone fiber optic gyroscope of claim 1, further comprising: the gap is 0.5 mm; the thickness of the insulating rubber annular pad (03) is 0.7 mm.
3. The moisture resistant, vibration resistant, off-bone fiber optic gyroscope of claim 2, further comprising: the adhesive is 353ND glue.
4. The moisture resistant, vibration resistant, off-bone fiber optic gyroscope of claim 3, wherein: one end of the inner cylinder (11) of the mounting framework, which is close to the annular cover plate (2), is provided with an annular folded edge (14) which is bent towards the center of the annular folded edge; the bent part is provided with an annular gap (141) matched with the inner side of the annular cover plate (2);
the fiber passing channel (6) is arranged on the annular folded edge (14);
at least three first mounting holes (16) are uniformly formed in the annular folded edge (14) along the circumferential direction of the annular folded edge and are used for being connected with the gyro table body (01).
5. The moisture resistant, vibration resistant, off-bone fiber optic gyroscope of claim 4, wherein: the sealant comprises silicon rubber, light-cured glue and epoxy glue (51);
the silicon rubber is filled in the opening part at one side, communicated with the annular sealing cavity (5), of the fiber passing channel (6);
the light-cured adhesive is filled in a gap between the tail fiber (41) and the protective sleeve (3);
the epoxy glue (51) is filled in gaps among the protective sleeve (3), the annular cover plate (2) and the mounting framework inner cylinder (11) and is filled in two arc-shaped gaps among the annular cover plate (2) and the mounting framework inner cylinder (11), and the two arc-shaped gaps are distributed on two sides of the fiber passing channel (6).
6. The moisture resistant, vibration resistant, off-bone fiber optic gyroscope of claim 5, wherein: the annular cover plate (2) and the mounting framework outer cylinder (12) are welded by laser;
the gaps between the annular cover plate (2) and the annular notch (141) except for the arc-shaped gap are welded by laser.
7. The moisture resistant, vibration resistant, off-bone fiber optic gyroscope of claim 6, further comprising: the installation framework inner cylinder (11), the installation framework outer cylinder (12) and the annular bottom plate (13) are of an integral structure.
8. The moisture resistant, vibration resistant, off-bone fiber optic gyroscope of claim 1, further comprising: the gyroscope table body (01) is provided with a fiber guide groove for accommodating the protective sleeve (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911268871.0A CN110879061A (en) | 2019-12-11 | 2019-12-11 | Damp-proof and vibration-proof off-skeleton fiber optic gyroscope |
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| CN201911268871.0A CN110879061A (en) | 2019-12-11 | 2019-12-11 | Damp-proof and vibration-proof off-skeleton fiber optic gyroscope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124848A (en) * | 2021-03-23 | 2021-07-16 | 西安航天精密机电研究所 | Bonding device and bonding method for improving temperature performance of optical fiber ring |
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2019
- 2019-12-11 CN CN201911268871.0A patent/CN110879061A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124848A (en) * | 2021-03-23 | 2021-07-16 | 西安航天精密机电研究所 | Bonding device and bonding method for improving temperature performance of optical fiber ring |
| CN113124848B (en) * | 2021-03-23 | 2022-09-16 | 西安航天精密机电研究所 | Bonding device and bonding method for improving temperature performance of optical fiber ring |
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