Novel heat preservation shielding cover for optical fiber ring

Abstract

The utility model discloses a novel heat preservation shielding case for an optical fiber ring, which belongs to the technical field of heat preservation devices for important optical fiber rings of optical fiber gyroscopes, and comprises an upper shielding case and a lower shielding case, and the upper shielding case is welded above the lower shielding case; according to the utility model, the inner, outer, upper and lower shielding cases are made of solid ferro-nickel soft magnetic alloy materials, so that the shielding case has excellent magnetic conductivity and can effectively shield the interference of the external environment on the optical fiber ring, and the sandwich layer formed by the upper honeycomb core interlayer and the lower honeycomb core interlayer has the advantages of light weight, high strength, corrosion resistance and the like, so that the weight of the shielding case can be effectively reduced; the shielding cover is simple in structure and convenient to transport and install, meanwhile, the shielding effect is improved, the influence of temperature on the optical fiber ring can be effectively reduced, the precision of the gyroscope is improved, the shielding cover adopts a three-layer shielding structure, interference of the external environment on optical fibers can be effectively shielded, and the stability of optical fiber communication is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat preservation devices for optical fiber rings, which are key components of optical fiber gyroscopes, and particularly relates to a novel heat preservation shielding cover for optical fiber rings. Background Art

[0002] The fiber optic ring, a core component of a fiber optic gyroscope (FOG), is extremely sensitive to magnetic fields and temperature. When a temperature gradient varies with time and space along the fiber, the FOG produces a thermally induced nonreciprocal phase difference, known as the Shupe effect. To mitigate the low gyro precision caused by the Shupe effect, fiber optic rings typically employ eight- or sixteen-level symmetrical winding methods. However, these winding methods cannot guarantee ideal thermal symmetry. Therefore, current methods use modeling to predict the relationship between temperature and gyro output, thereby compensating for the gyro output. However, if the temperature distribution and variation differ significantly from the modeled one, the model's accuracy decreases, affecting the compensation effect. To reduce the magnetic sensitivity of FOGs, a new thermal shielding cover for fiber optic rings is needed to address this issue. Utility Model Content

[0003] The purpose of the present utility model is to provide a novel heat-insulating shielding cover for an optical fiber ring, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a novel heat-insulating shielding cover for an optical fiber ring, comprising an upper shielding cover and a lower shielding cover, wherein the upper shielding cover is welded above the lower shielding cover;

[0005] The upper shielding cover comprises an upper outer shielding cover, an upper inner shielding cover and an upper honeycomb core sandwich, the lower surface of the upper outer shielding cover is bonded to the upper honeycomb core sandwich, and the lower surface of the upper honeycomb core sandwich is bonded to the upper inner shielding cover;

[0006] The lower shielding cover includes a lower outer shielding cover, a lower inner shielding cover and a lower honeycomb core sandwich. The lower surface of the lower outer shielding cover is bonded to the lower honeycomb core sandwich, and the lower surface of the lower honeycomb core sandwich is bonded to the lower inner shielding cover.

[0007] By setting the above structure, the shield can achieve heat preservation effect without changing its magnetic shielding performance and strength, and the shape and size of the upper shield and the lower shield can be adjusted according to actual needs to achieve the best shielding effect and weight.

[0008] As a preferred solution, the upper outer shielding cover, the upper inner shielding cover, the lower outer shielding cover and the lower inner shielding cover are all made of iron-nickel soft magnetic alloy.

[0009] As a preferred solution, the thickness of the upper shielding cover and the lower shielding cover are both set to 2 mm.

[0010] As a preferred solution, the thickness of the upper honeycomb core interlayer and the lower honeycomb core interlayer are both set to 1 mm.

[0011] As a preferred solution, the upper outer shielding cover, the upper inner shielding cover, the lower outer shielding cover and the lower inner shielding cover are all set to be ring-shaped.

[0012] As a preferred solution, the upper honeycomb core interlayer and the lower honeycomb core interlayer are both ring-shaped.

[0013] As a preferred solution, an optical fiber ring is provided between the upper inner shielding cover and the lower inner shielding cover.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model has the advantages that the inner and outer upper and lower shielding covers are made of solid nickel-iron soft magnetic alloy material, which has excellent magnetic conductivity and can effectively shield the interference of the external environment on the optical fiber ring. The sandwich layer composed of the upper honeycomb core sandwich and the lower honeycomb core sandwich has the advantages of light weight, high strength, and corrosion resistance. It can effectively reduce the weight of the shielding cover, facilitate transportation and installation, and at the same time improve the shielding effect and effectively reduce the influence of temperature on the optical fiber ring, thereby improving the gyroscope accuracy. The shielding cover adopts a three-layer shielding structure to more effectively shield the interference of the external environment on the optical fiber and improve the stability of optical fiber communication.

[0016] In the utility model, the inner and outer shielding covers are fixed to the upper honeycomb core interlayer and the lower honeycomb core interlayer by using adhesive, thereby ensuring the integrity and stability of the shielding covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model in a frontal perspective;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the lower outer shielding cover of the utility model;

[0019] Figure 3 It is a schematic diagram of a three-dimensional cross-sectional structure of the utility model;

[0020] Figure 4 For this utility model Figure 3 Schematic diagram of the structure enlarged at point A.

[0021] In the figure: 1. upper shielding cover; 101. upper outer shielding cover; 102. upper inner shielding cover; 103. upper honeycomb core interlayer; 2. lower shielding cover; 201. lower outer shielding cover; 202. lower inner shielding cover; 203. lower honeycomb core interlayer; 3. optical fiber ring. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the embodiments.

[0023] The following examples are intended to illustrate the present invention and are not intended to limit the scope of protection of the present invention. The conditions in the examples may be further adjusted according to specific conditions. Simple improvements to the method of the present invention based on the concept of the present invention fall within the scope of protection claimed by the present invention.

[0024] See also Figure 1-4 The utility model provides a novel heat-insulating shielding cover for an optical fiber ring, comprising an upper shielding cover 1 and a lower shielding cover 2, wherein the upper shielding cover 1 is welded on top of the lower shielding cover 2;

[0025] The upper shielding cover 1 includes an upper outer shielding cover 101, an upper inner shielding cover 102 and an upper honeycomb core sandwich 103. The lower surface of the upper outer shielding cover 101 is bonded to the upper honeycomb core sandwich 103, and the lower surface of the upper honeycomb core sandwich 103 is bonded to the upper inner shielding cover 102.

[0026] The lower shielding cover 2 includes a lower outer shielding cover 201, a lower inner shielding cover 202 and a lower honeycomb core interlayer 203. The lower surface of the lower outer shielding cover 201 is bonded to the lower honeycomb core interlayer 203, and the lower surface of the lower honeycomb core interlayer 203 is bonded to the lower inner shielding cover 202. The upper outer shielding cover 101, the upper inner shielding cover 102, the lower outer shielding cover 201 and the lower inner shielding cover 202 are all made of an iron-nickel soft magnetic alloy. By arranging the upper inner shielding cover 102 and the lower inner shielding cover 202, the upper inner shielding cover 102 and the lower inner shielding cover 202 connected together can form an outer shielding cover structure.

[0027] The thickness of the upper shielding cover 1 and the lower shielding cover 2 is set to 2 mm, the thickness of the upper honeycomb core interlayer 103 and the lower honeycomb core interlayer 203 is set to 1 mm, the shape of the upper outer shielding cover 101, the upper inner shielding cover 102, the lower outer shielding cover 201 and the lower inner shielding cover 202 are all set to be annular, and the shape of the upper honeycomb core interlayer 103 and the lower honeycomb core interlayer 203 are both set to be annular. By arranging the upper honeycomb core interlayer 103 and the lower honeycomb core interlayer 203, the shape and size of the upper honeycomb core interlayer 103 and the lower honeycomb core interlayer 203 can also be flexibly designed and adjusted according to actual needs, and the upper honeycomb core interlayer 103 and the lower honeycomb core interlayer 203 connected together can form a sandwich layer structure with electromagnetic shielding and thermal insulation effects;

[0028] An optical fiber ring 3 is provided between the upper inner shielding cover 102 and the lower inner shielding cover 202 . By providing the upper outer shielding cover 101 and the upper inner shielding cover 102 , the upper outer shielding cover 101 and the upper inner shielding cover 102 connected together can form an outer shielding cover structure.

[0029] The working principle and use process of the present invention: When the shielding cover needs to be used, the upper outer shielding cover 101 is glued to the upper surface of the upper honeycomb core interlayer 103 using glue, and the upper inner shielding cover 102 is glued to the lower surface of the upper honeycomb core interlayer 103 using glue;

[0030] Move the lower honeycomb core interlayer 203 into the lower outer shielding cover 201 and glue them together, then move the lower inner shielding cover 202 into the lower honeycomb core interlayer 203 and glue them together, then place the optical fiber ring 3 between the upper inner shielding cover 102 and the lower inner shielding cover 202, and then weld the upper outer shielding cover 101 and the lower outer shielding cover 201 together.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel heat-insulating shielding cover for an optical fiber ring, comprising an upper shielding cover (1) and a lower shielding cover (2), characterized in that: The upper shielding cover (1) is welded above the lower shielding cover (2); The upper shielding cover (1) comprises an upper outer shielding cover (101), an upper inner shielding cover (102) and an upper honeycomb core sandwich (103); the lower surface of the upper outer shielding cover (101) is bonded to the upper honeycomb core sandwich (103); and the lower surface of the upper honeycomb core sandwich (103) is bonded to the upper inner shielding cover (102); The lower shielding cover (2) comprises a lower outer shielding cover (201), a lower inner shielding cover (202) and a lower honeycomb core interlayer (203); the lower surface of the lower outer shielding cover (201) is bonded to the lower honeycomb core interlayer (203); and the lower surface of the lower honeycomb core interlayer (203) is bonded to the lower inner shielding cover (202).

2. A novel heat-insulating shielding cover for an optical fiber ring according to claim 1, characterized in that: The upper outer shielding cover (101), the upper inner shielding cover (102), the lower outer shielding cover (201) and the lower inner shielding cover (202) are all made of an iron-nickel soft magnetic alloy.

3. The novel heat-insulating shielding cover for an optical fiber ring according to claim 1, characterized in that: The thickness of the upper shielding cover (1) and the lower shielding cover (2) are both set to 2 mm.

4. The novel heat-insulating shielding cover for an optical fiber ring according to claim 1, characterized in that: The thickness of the upper honeycomb core interlayer (103) and the lower honeycomb core interlayer (203) are both set to 1 mm.

5. The novel heat-insulating shielding cover for an optical fiber ring according to claim 1, characterized in that: The upper outer shielding cover (101), the upper inner shielding cover (102), the lower outer shielding cover (201) and the lower inner shielding cover (202) are all arranged in an annular shape.

6. The novel heat-insulating shielding cover for an optical fiber ring according to claim 1, characterized in that: The upper honeycomb core interlayer (103) and the lower honeycomb core interlayer (203) are both ring-shaped.

7. The novel heat-insulating shielding cover for an optical fiber ring according to claim 1, characterized in that: An optical fiber ring (3) is provided between the upper inner shielding cover (102) and the lower inner shielding cover (202).

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