Laser gyroscope getter structure and laser gyroscope

Abstract

The utility model discloses a laser gyro getter structure and laser gyro, the getter structure comprises two compressed metal mesh layers and a getter body crimped between the two compressed metal mesh layers, the compressed metal mesh layers are formed by pressing a plurality of layers of metal meshes along the direction perpendicular to the mesh surfaces of the metal meshes, the getter body is crimped between the compressed metal mesh layers, and the getter body is crimped between the compressed metal mesh layers. Each layer of metal net is formed by weaving metal wires in a criss-cross mode, and first included angles between projections of the metal wires, arranged in the longitudinal direction, of different layers of metal nets on the bottom face of the compressed metal net layer from bottom to top and the longitudinal center line of the bottom face are evenly and gradually changed. A second included angle between the projection of the metal wires which are transversely arranged on the bottom surface of the compressed metal net layer and the transverse center line of the bottom surface of the metal net layer in different layers from bottom to top is also uniformly and gradually changed, so that the compressed metal net layer spatially forms a structure that the meshes of the multiple layers of metal nets are woven in a staggered manner. According to the utility model, the problems of getter fixation and dust falling are solved, the service life of the laser gyroscope is prolonged, and the performance quality of the laser gyroscope is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser gyroscope preparation, and specifically relates to a laser gyroscope getter structure and a laser gyroscope. Background Art

[0002] Laser gyroscopes are sensors used to detect angular motion and are devices with high vacuum requirements. Getters are devices installed inside laser gyroscopes that can absorb various active gases released from the inner wall of the laser gyroscope's optical cavity, such as water vapor, carbon dioxide, carbon monoxide, oxygen, hydrogen, etc., but will not absorb helium-neon gas.

[0003] The getter body 1 is generally made of evaporative powder sintered and pressed, which is easy to fall off during high-temperature activation or aging. The dust that falls into the optical cavity after falling off will greatly affect the accuracy of the laser gyroscope or even cause it to fail. In addition, the getter body 1 works in 500Hz jitter for a long time. The installation requires that the getter body 1 can be fixed reliably and cannot move in the face of external impact and vibration. Movement can easily cause friction of the getter body 1 to generate dust. Therefore, how to design the getter structure to avoid dust pollution and how to fix it in the cavity has always been a difficult problem to solve. Figure 1 As shown, the conventional getter structure includes a slot body formed by a nickel sheet 2, a getter body 1 installed in the slot body, and a mounting bracket 3 that supports the getter structure as a whole in the getter slot 4 of the laser gyroscope, as shown in FIG. Figure 2 As shown, the air intake groove 4 of the laser gyroscope is connected to the optical cavity 5 of the laser gyroscope. The groove body formed by the nickel sheet 2 mainly prevents the getter from falling into the cavity. In order to allow the gas in the optical cavity 5 to enter the groove body and contact the getter, a small hole needs to be opened on the side of the nickel sheet 2, so there is still a hidden danger of dust falling into the optical cavity. In addition, although the elastic mounting bracket 3 can cope with external shocks and vibrations in a short period of time and limit the activity of the getter structure, the existing mounting bracket 3 has low elasticity, a long time and a high risk of elastic failure after aging, and has not yet achieved a good effect. Moreover, the mounting bracket 3 is a bent part with an arc, and the arc is in point contact with the groove wall, which is extremely unstable. Not only does the mounting bracket 3 fall off at the welding position after vibration, but the installation gap is also difficult to grasp and can only be adjusted by experience. Therefore, how to design the getter structure to avoid dust pollution and how to fix it in the cavity for a long time have always been extremely difficult problems to solve. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a laser gyro getter structure to solve the getter fixation and dust shedding problems raised in the above background, thereby improving the service life and performance quality of the laser gyro.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A laser gyroscope getter structure comprises two layers of compressed metal mesh layers and a getter body crimped between the two layers of compressed metal mesh layers, wherein the compressed metal mesh layers are formed by pressing multiple layers of metal mesh in a direction perpendicular to the mesh surface of the metal mesh, and each layer of the metal mesh is formed by crisscrossing and weaving metal wires, and the first angle between the projection of the metal wires arranged longitudinally on the bottom surface of the compressed metal mesh layer from bottom to top and the longitudinal center line of the bottom surface is uniformly varied, and the second angle between the projection of the metal wires arranged transversely on the bottom surface of the compressed metal mesh layer from bottom to top and the transverse center line of the bottom surface is also uniformly varied, so that the compressed metal mesh layer forms a structure in which the mesh holes of the multiple layers of metal mesh are staggered in space.

[0007] Optionally, the diameter of the metal wire is 0.01-0.02 mm, and the mesh size of the metal mesh is ≤0.01 mm.

[0008] Optionally, the number of metal mesh layers of the compressed metal mesh layer is 50-300.

[0009] Optionally, the first angle and the second angle both vary in a gradient of 1.2°-7.2°.

[0010] Optionally, the metal wire is made of stainless steel.

[0011] Optionally, the getter body is formed by sintering and pressing barium aluminum nickel getter powder or barium aluminum getter powder.

[0012] The utility model also provides a laser gyroscope, comprising a laser gyroscope body and the above-mentioned laser gyroscope getter structure, wherein the laser gyroscope getter structure is installed in an air-intake groove of the laser gyroscope body.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] 1. The utility model presses the getter body between two layers of compressed metal mesh layers. The multiple layers of metal mesh constituting the compressed metal mesh layer are arranged in a staggered manner, thereby forming a structure in which mesh holes are staggered in space. This structure has poor permeability to dust and other particulates, but good permeability to small gas molecules, thereby effectively solving the problem of getter dust contaminating the inner cavity loop.

[0015] 2. The compressed metal mesh has good elasticity, and its multi-layer structure has good elasticity maintenance. At the same time, the symmetrical arrangement of the front and rear compressed metal meshes can effectively compensate for the problem of insufficient elasticity during the aging process.

[0016] 3. The getter body of the utility model is crimped between two layers of compressed metal mesh and entangled with the compressed metal wire. Facing external impact and vibration, it has good buffering and vibration reduction effects, and there is no hidden danger of friction of the getter body.

[0017] 4. The laser gyro getter structure of the utility model can be applied to gyro of different sizes, has good consistency and strong inheritability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the three-dimensional structure of a conventional laser gyroscope getter structure.

[0019] Figure 2 Schematic diagram of the structure of a conventional getter structure installed in a laser gyroscope.

[0020] Figure 3 It is a schematic cross-sectional structure diagram of the laser gyro getter structure of the utility model.

[0021] Figure 4 The utility model is a schematic structural diagram of the getter structure installed in the laser gyroscope. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0023] Embodiment 1:

[0024] like Figure 3 As shown, a laser gyro getter structure provided in this embodiment includes two layers of compressed metal mesh layers 6, and an getter body 1 crimped between the two layers of compressed metal mesh layers 6, the compressed metal mesh layer 6 is formed by pressing multiple layers of metal mesh in a direction perpendicular to the metal mesh, each layer of metal mesh is formed by crisscrossing and weaving metal wires, and the first angle between the projection of the metal wires arranged longitudinally of different layers of metal mesh on the bottom surface of the compressed metal mesh layer 6 and the longitudinal center line of the bottom surface from bottom to top is uniformly varied, and the second angle between the projection of the metal wires arranged transversely of different layers of metal mesh on the bottom surface of the compressed metal mesh layer 6 and the transverse center line of the bottom surface is also uniformly varied, so that the compressed metal mesh layer 6 forms a structure in which the mesh holes of multiple layers of metal mesh are staggered in space.

[0025] Therefore, the mesh interlaced woven structure has poor permeability to dust and other particulate matter, but good permeability to small gas molecules, thus effectively solving the problem of getter dust contaminating the inner cavity loop.

[0026] In addition, the compressed metal mesh has good elasticity, and its multi-layer structure can better maintain the elasticity. At the same time, the symmetrical arrangement of the front and rear compressed metal meshes can effectively compensate for the problem of insufficient elasticity during the aging process.

[0027] In addition, the getter body 1 is crimped between two layers of compressed metal mesh layers 6 and entangled with the compressed metal wires, which has good buffering and vibration reduction effects in the face of external impact and vibration, and there is no hidden danger of friction of the getter body.

[0028] In this embodiment, the metal wire is made of fine diameter high clean metal stainless steel 316, with a diameter of 0.01-0.02mm, and is precisely wound and woven into a mesh by layer, and the mesh aperture of the metal mesh is ≤0.01mm. At the same time, each layer of the woven mesh is laid at different rotation angles to form a multi-layer structure, and finally the multi-layer structure is pressed perpendicular to the direction of the metal mesh by a press. The pressing process can refer to the pressing process of the metal spring with the same diameter.

[0029] In this embodiment, the number of layers of the compressed metal mesh layer is 50-300. The first angle and the second angle are both gradually changed from 1.2° to 7.2° to meet the use requirements of gyroscopes of different sizes. The corresponding number of layers and angles are determined according to the size of the gyroscope.

[0030] Therefore, the laser gyro getter combination structure of this embodiment can be used in gyroscopes of different sizes, has good consistency, and is highly inheritable.

[0031] In this embodiment, the getter body is formed by sintering and pressing barium aluminum nickel getter powder or barium aluminum getter powder. The getter body adopts an evaporation type disc, which has a large amount of barium and a large amount of air after activation.

[0032] Embodiment 2:

[0033] like Figure 4 As shown, the utility model also provides a laser gyroscope, comprising a laser gyroscope body and the laser gyroscope getter structure of embodiment 1, wherein the laser gyroscope getter structure is installed in the getter groove of the laser gyroscope body.

[0034] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A laser gyro getter structure, characterized in that: The invention comprises two layers of compressed metal mesh layers (6), and an inhaler body (1) compressed between the two layers of compressed metal mesh layers (6), wherein the compressed metal mesh layer (6) is formed by pressing a plurality of layers of metal mesh in a direction perpendicular to the metal mesh surface, and each layer of metal mesh is formed by crisscrossing and weaving metal wires, and the first angle between the projection of the metal wires arranged in the longitudinal direction of the different layers of metal mesh on the bottom surface of the compressed metal mesh layer (6) and the longitudinal center line of the bottom surface from bottom to top is uniformly changed, and the second angle between the projection of the metal wires arranged in the transverse direction of the different layers of metal mesh on the bottom surface of the compressed metal mesh layer (6) and the transverse center line of the bottom surface is also uniformly changed, so that the compressed metal mesh layer (6) forms a structure in which the mesh holes of the plurality of layers of metal mesh are crisscrossed and woven in space.

2. The laser gyro getter structure according to claim 1, characterized in that: The diameter of the metal wire is 0.01-0.02 mm, and the mesh size of the metal mesh is ≤0.01 mm.

3. The laser gyro getter structure according to claim 1, characterized in that: The number of layers of the metal mesh of the compressed metal mesh layer is 50-300.

4. The laser gyro getter structure according to claim 1, characterized in that: The first angle and the second angle both vary in a gradient of 1.2°-7.2°.

5. The laser gyro getter structure according to claim 1, characterized in that: The metal wire is made of stainless steel.

6. A laser gyro, characterized in that: It comprises a laser gyro body and a laser gyro getter structure as claimed in any one of claims 1 to 5, wherein the laser gyro getter structure is installed in an air getter groove (4) of the laser gyro body.

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