Double-layer heat preservation optical fiber ring shielding cover

Abstract

The utility model discloses a double-layer heat preservation optical fiber ring shielding case, which belongs to the technical field of optical fiber gyroscope important piece optical fiber rings, and comprises a shielding assembly, a heat insulation assembly and an optical fiber gyroscope important piece optical fiber ring, the shielding assembly comprises a lower shielding case, and an upper shielding case is arranged on the lower shielding case. The heat insulation assembly comprises a first heat insulation ring, a second heat insulation ring and a heat insulation plate, and the first heat insulation ring and the second heat insulation ring are bonded in the lower shielding case; according to the utility model, the upper shielding case, the lower shielding case and the heat insulation layer are arranged, the shielding case made of soft magnetic alloy materials has a magnetic shielding effect and can effectively reduce electromagnetic interference, and the heat insulation layer is arranged in the shielding case, so that heat can be effectively preserved, the working efficiency of the optical fiber ring which is a key part of the optical fiber gyroscope is improved, and the shielding case is compact in structure and convenient to manufacture. And the requirements on low weight and low volume of the gyroscope in the market are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fiber optic gyroscope key element fiber coil, concretely relates to double -deck heat preservation fiber ring shield case. BACKGROUND

[0002] Nickel iron soft magnetic alloy shield case as the protection cover of fiber optic gyroscope key element fiber ring, has the effect of magnetic shielding, but its heat preservation performance is poor. At present, the commonly used fiber optic gyroscope key element fiber ring shield case is used at -60 DEG C to 85 DEG C. With the development of fiber optic gyroscope, the temperature range of fiber optic gyroscope is also expanding. Fiber optic gyroscope key element fiber ring as the core key component of fiber optic gyroscope, is greatly influenced by temperature, especially when using fiber optic gyroscope in harsh environment, since the shield case of prior art cannot play the heat preservation effect, the measurement accuracy of fiber optic gyroscope will also be greatly reduced. In order to reduce the fiber optic gyroscope Shup error and photoelastic effect caused by temperature, the heat preservation device of fiber optic gyroscope key element fiber ring is essential, therefore, double -deck heat preservation fiber ring shield case is needed to solve the above problems. SUMMARY

[0003] The utility model discloses a double -deck heat preservation fiber ring shield case to solve the problem in the background art.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: double -deck heat preservation fiber ring shield case, including shield component, heat insulating component and fiber optic gyroscope key element fiber ring, the shield component includes lower shield case, is equipped with upper shield case on the lower shield case, the heat insulating component includes first heat insulating ring, second heat insulating ring and heat insulating plate, the first heat insulating ring and second heat insulating ring are bonded in the lower shield case, the heat insulating plate is bonded in the lower surface of upper shield case, the heat insulating layer is bonded in the bottom of lower shield case, the heat insulating plate is located the upper surface of first heat insulating ring and second heat insulating ring, the fiber optic gyroscope key element fiber ring is bonded in the upper surface of heat insulating layer.

[0005] By setting up above -mentioned structure, this shield case provides a kind of compact structure, performance stable heat preservation structure, can improve the environmental temperature range of fiber optic gyroscope key element fiber ring and the measurement accuracy of fiber optic gyroscope.

[0006] As a preferred scheme, the upper shield case and the lower shield case are made of iron-nickel soft magnetic alloy material, which can magnetically shield the fiber optic gyroscope key element fiber ring.

[0007] As a preferred scheme, the heat insulating layer is made of porous vacuum silicon or polyurethane hard foam insulation material, which not only has heat insulation effect but also has certain hardness to prevent the fiber from shaking slightly after being placed.

[0008] As a preferred scheme, the upper shielding cover and the lower shielding cover are connected by welding.

[0009] As a preferred scheme, the second heat insulation ring is arranged in the first heat insulation ring, and the fiber-optic gyroscope key component fiber-optic ring is arranged between the first heat insulation ring and the second heat insulation ring.

[0010] As a preferred scheme, the fiber-optic gyroscope key component fiber-optic ring is arranged below the heat insulation plate, and the fiber-optic gyroscope key component fiber-optic ring is arranged between the lower shielding cover and the upper shielding cover.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] The utility model discloses a shielding cover is arranged with upper, lower shielding cover, heat insulation layer, and this shielding cover adopts the shielding cover of soft magnetic alloy material and has the magnetic shielding effect, can effectively reduce electromagnetic interference, and the heat insulation layer is equipped in this shielding cover, can effectively keep warm, improve the working efficiency of fiber-optic gyroscope key component fiber-optic ring, and the shielding cover structure is compact, satisfies the requirement of low weight and low volume of gyroscope on the market. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the structure schematic diagram of the utility model's front view solid;

[0014] Fig. 2 It is the sectional structure schematic diagram of the utility model's front view solid;

[0015] Fig. 3 It is the structure schematic diagram of the utility model's solid explosion.

[0016] In the drawing: 1, shielding assembly;101, lower shielding cover;102, upper shielding cover;2, heat insulation assembly;201, first heat insulation ring;202, second heat insulation ring;203, heat insulation plate;3, heat insulation layer;4, fiber-optic gyroscope key component fiber-optic ring. DETAILED DESCRIPTION

[0017] The utility model will be further described below in combination with examples.

[0018] The following examples are used to illustrate the utility model, but can not be used to limit the protection scope of the utility model. The conditions in the examples can be further adjusted according to specific conditions, and the simple improvement of the method of the utility model under the concept of the utility model belongs to the range of the utility model required protection.

[0019] Please refer to Figs. 1-3The utility model provides a double -deck heat preservation optical fiber ring shield case, including shielding subassembly 1, heat insulating component 2 and optical fiber gyro key element optical fiber ring 4, shielding subassembly 1 includes lower shield 101, be equipped with upper shield 102 on lower shield 101, heat insulating component 2 includes first heat insulating ring 201, second heat insulating ring 202 and heat insulating plate 203, and first heat insulating ring 201 and second heat insulating ring 202 are bonded in lower shield 101, and heat insulating plate 203 is bonded in the lower surface of upper shield 102, and heat insulating layer 3 is bonded in the bottom in lower shield 101, and heat insulating plate 203 is equipped on the upper surface of first heat insulating ring 201 and second heat insulating ring 202, and optical fiber gyro key element optical fiber ring 4 is bonded in the upper surface of heat insulating layer 3, and upper shield 102 and lower shield 101 all adopt iron nickel soft magnetic alloy material, can carry out magnetic shielding to optical fiber gyro key element optical fiber ring 4, and heat insulating layer 3 selects porous vacuum silicon or polyurethane hard bubble heat preservation material quality, not only has heat insulating effect, still has certain hardness, avoids the emergence of small amplitude shaking after optical fiber placement, and upper shield 102 and lower shield 101 are connected through welding, and second heat insulating ring 202 is equipped in first heat insulating ring 201, and optical fiber gyro key element optical fiber ring 4 is equipped between first heat insulating ring 201 and second heat insulating ring 202, and optical fiber gyro key element optical fiber ring 4 is equipped below heat insulating plate 203, and optical fiber gyro key element optical fiber ring 4 is equipped between lower shield 101 and upper shield 102.

[0020] The magnetic shielding size in the shield, the size and material of the heat insulating layer 3, the size and material of the heat insulating pad, the bonding method of the heat insulating layer 3 and the shield, and the bonding method of the heat insulating pad and the shield can be adjusted according to actual needs.

[0021] The working principle and use process of the utility model are as follows: the double-layer optical fiber gyro key element optical fiber ring 4 heat preservation shield has better heat preservation effect than ordinary shields under the same temperature and time.

[0022] When the shield is in use, the heat insulating layer 3 is bonded to the bottom of the inner wall of the lower shield 101, the first heat insulating ring 201 is bonded to the outer side of the inner wall of the lower shield 101, the second heat insulating ring 202 is bonded to the inner side of the inner wall of the lower shield 101, the first heat insulating ring 201 and the second heat insulating ring 202 are bonded to the upper surface of the heat insulating layer 3, the optical fiber gyro key element optical fiber ring 4 is bonded to the upper surface of the heat insulating layer 3, the optical fiber gyro key element optical fiber ring 4 is arranged between the first heat insulating ring 201 and the second heat insulating ring 202, the heat insulating plate 203 is bonded to the lower surface of the upper shield 102, the upper shield 102 is moved, the moving upper shield 102 drives the heat insulating plate 203 to be bonded to the upper surfaces of the first heat insulating ring 201 and the second heat insulating ring 202, and then the upper shield 102 and the lower shield 101 are welded together by laser.

[0023] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Double-layer thermal insulation optical fiber ring shield cover, comprising a shield assembly (1), a thermal insulation assembly (2) and an optical fiber ring (4) of an optical fiber gyroscope key component, characterized in that: The shielding assembly (1) comprises a lower shielding cover (101) provided with an upper shielding cover (102), the heat insulation assembly (2) comprises a first heat insulation ring (201), a second heat insulation ring (202) and a heat insulation plate (203), the first heat insulation ring (201) and the second heat insulation ring (202) are both bonded in the lower shielding cover (101), the heat insulation plate (203) is bonded to the lower surface of the upper shielding cover (102), a heat insulation layer (3) is bonded to the bottom in the lower shielding cover (101), the heat insulation plate (203) is arranged on the upper surface of the first heat insulation ring (201) and the second heat insulation ring (202), and an optical fiber gyro key component optical fiber ring (4) is bonded to the upper surface of the heat insulation layer (3).

2. The dual layer thermal optical fiber loop shield according to claim 1, wherein: The upper shielding cover (102) and the lower shielding cover (101) are both made of iron-nickel soft magnetic alloy material, and can magnetically shield the optical fiber gyro key component optical fiber ring (4).

3. The dual layer thermal optical fiber loop shield according to claim 1, wherein: The heat insulation layer (3) is made of porous vacuum silicon or polyurethane hard foam heat preservation material.

4. The dual layer thermal optical fiber loop shield according to claim 1, wherein: The upper shielding cover (102) and the lower shielding cover (101) are connected by welding.

5. The dual layer thermal optical fiber loop shield according to claim 1, wherein: The second heat insulation ring (202) is arranged in the first heat insulation ring (201), and the optical fiber gyro key component optical fiber ring (4) is arranged between the first heat insulation ring (201) and the second heat insulation ring (202).

6. The dual layer thermal optical fiber loop shield according to claim 1, wherein: The optical fiber gyro key component optical fiber ring (4) is arranged below the heat insulation plate (203), and the optical fiber gyro key component optical fiber ring (4) is arranged between the lower shielding cover (101) and the upper shielding cover (102). The optical fiber gyro key component optical fiber ring (4) is arranged below the heat insulation plate (203), and the optical fiber gyro key component optical fiber ring (4) is arranged between the lower shielding cover (101) and the upper shielding cover (102).

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