Integrated Structure of Getter, Exhaust Pipe and Anode and Laser Gyro

Abstract

The present invention belongs to the technical field of laser gyroscopes, and discloses an integrated structure of a getter, an exhaust pipe and an anode, and a laser gyroscope. The integrated structure of the getter, the exhaust pipe and the anode includes: an exhaust terminal, two nickel strips, and a getter; the exhaust terminal is cylindrical, one end of the exhaust terminal is a hemispherical anode; the other end is provided with a blind hole as the exhaust pipe; an annular platform is provided on one side of the exhaust terminal close to the anode; the bottom of the blind hole extends between the annular platform and the anode, and the exhaust terminal is provided with a vent hole in the radial direction to communicate the bottom of the blind hole with the outer surface of the exhaust terminal; the getter is annular, sleeved on one side of the anode of the exhaust terminal, and is welded and fixed to the lower end surface of the annular platform through two nickel strips.

Description

Technical Field

[0001] The present invention belongs to the field of laser gyro technology, and particularly relates to an integrated structure of a getter, an exhaust pipe, and an anode, and a laser gyro. Background Art

[0002] A laser gyro is a ring-shaped helium-neon laser, which is composed of a microcrystalline glass cavity, a cathode, an anode, an exhaust pipe, a getter, and a mirror; the cathode, anode, and exhaust pipe are connected to the cavity by indium sealing, the mirror is connected to the cavity by optical cementing, and the getter is installed inside the cavity through a fixing device; the cathode and anode are the discharge mechanisms of the laser, forming a glow discharge inside the cavity, and the anode material is usually oxygen-free copper, titanium, etc.; the exhaust pipe is used for connecting the inside of the cavity with an external vacuum device to achieve the acquisition of an ultra-high vacuum environment inside the cavity and the injection of gain gas. The material of the exhaust pipe is usually oxygen-free copper or invar alloy, and is clamped and sealed by cold welding, only leaving a small section on the cavity; the material of the getter is usually a titanium-molybdenum alloy or a zirconium-based multi-element alloy, which is fixed inside the cavity through a fixing mechanism, and is heated and activated in a high-vacuum environment by high-frequency induction or laser irradiation to obtain the ability to absorb impurity gases and absorb the impurity gases that appear during the operation of the gyro.

[0003] There are mainly two configuration methods for the anode, exhaust pipe, and getter of traditional laser gyros: 1. The anode, exhaust pipe, and getter are independent of each other and are used for laser gyros with larger sizes and lower requirements for structural compactness. Usually, the getter is fixedly installed in the gas storage hole in the center of the cavity through an elastic support. There is contact and friction between the elastic support and the gas storage hole, which easily causes cracks and dust in the glass of the gas storage hole, bringing adverse effects to the laser gyro; 2. The anode and exhaust pipe are integrated into an exhaust anode, and the getter is independent, and is used for laser gyros with medium sizes and relatively compact structures. The anode and exhaust pipe are integrated together, that is, one anode is used both as the anode for discharging and as the pipeline for pumping and inflating gas, making the structures of the two anodes asymmetric, resulting in asymmetric discharge voltages of the double anodes and affecting the improvement of gyro accuracy. At the same time, the exhaust pipe discharges electricity together with the anode, and the tiny particles inside the exhaust pipe will move into the cavity under the action of the electrophoresis effect, affecting the accuracy stability of the gyro. At the same time, the getter and the wall of the gas storage hole generate cracks and dust, bringing adverse effects to the laser gyro. The above two schemes are not conducive to improving the performance and reliability of the laser gyro, and at the same time limit the development of the laser gyro towards miniaturization and high precision. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated mechanism of a getter, an exhaust pipe, and an anode that can effectively reduce the adverse effects of the getter installation and the exhaust pipe on the laser gyro, improve the cleanliness inside the laser gyro cavity, improve the discharge symmetry and overall reliability of the laser gyro.

[0005] An integrated structure of a getter, an exhaust pipe and an anode, comprising: an exhaust terminal, two nickel tapes, and a getter;

[0006] The exhaust terminal is cylindrical, one end of the exhaust terminal is a hemispherical anode; the other end is provided with a blind hole as the exhaust pipe;

[0007] There is an annular platform on one side of the exhaust terminal close to the anode;

[0008] The bottom of the blind hole extends between the annular platform and the anode, and the exhaust terminal is provided with a vent hole along the radial direction to communicate the bottom of the blind hole with the outer surface of the exhaust terminal;

[0009] The getter is annular and sleeved on the anode side of the exhaust terminal. One end of the nickel tape is welded to the getter, and the other end is welded to the lower end surface of the annular platform.

[0010] Furthermore, the lower surface of the getter does not exceed the bottom plane of the hemispherical anode, and the annular getter is concentrically assembled with the anode without contact.

[0011] Furthermore, the roughness of the lower end surface of the annular platform is not greater than 1.6 microns. The inner circle of the lower end surface is welded with a nickel tape, and the outer circle is indium-sealed with the laser gyroscope cavity.

[0012] Furthermore, the material of the exhaust terminal is TU1 or TU2 oxygen-free copper or 4J36 invar alloy, and the exhaust pipe is used for cold welding and clamping.

[0013] Furthermore, the getter is activated by laser irradiation after the structure is installed in the laser gyroscope.

[0014] A laser gyroscope, comprising: a laser gyroscope cavity, a cathode, two of the integrated structures of the getter, the exhaust pipe and the anode;

[0015] One end of the laser gyroscope cavity is connected to the cathode, and two stepped holes are symmetrically opened on the laser gyroscope cavity as chambers to connect the integrated structure of the getter, the exhaust pipe and the anode.

[0016] A laser gyroscope, comprising: a laser gyroscope cavity, a cathode, one of the integrated structures of the getter, the exhaust pipe and the anode, and a common anode;

[0017] The laser gyroscope cavity is connected to the cathode and the common anode, and a stepped hole is also opened on the laser gyroscope cavity as a chamber for connecting the integrated structure of the getter, the exhaust pipe and the anode, and the integrated structure of the getter, the exhaust pipe and the anode is symmetrical about the common anode.

[0018] A laser gyroscope, comprising: a laser gyroscope cavity, two cathodes, one of the integrated structures of the getter, the exhaust pipe and the anode;

[0019] One end of the laser gyroscope cavity is connected to the integrated structure of the getter, exhaust pipe, and anode;

[0020] Two cathodes are also symmetrically connected to the laser gyroscope cavity.

[0021] Advantages of the present invention: The functions of the getter, exhaust pipe, and anode of the laser gyroscope are integrated, avoiding the contact and friction of the getter fixedly installed in the laser gyroscope cavity, eliminating the adverse effects of dust brought into the cavity by the installation of the getter, and being beneficial to improving the reliability of the gyroscope; avoiding the exhaust pipe participating in gas discharge, eliminating the adverse effects of tiny particles in the exhaust pipe entering the cavity through discharge electrophoresis, and being beneficial to improving the reliability of the gyroscope; by setting two integrated mechanisms of the getter, exhaust pipe, and anode, the complete symmetry of the two anode structures of the laser gyroscope is achieved, improving the symmetry of anode discharge and being beneficial to improving the accuracy of the gyroscope; the integration of the getter, exhaust pipe, and anode is beneficial to the miniaturization of the laser gyroscope. Description of the Drawings

[0022] In order to more clearly illustrate the specific implementation of the present invention, the specific drawings of the solution will be described below.

[0023] Figure 1 It is a schematic diagram of the integrated mechanism of the getter, exhaust pipe, and anode;

[0024] Figure 2 It is a schematic diagram of the exhaust terminal;

[0025] Figure 3 It is a schematic diagram of the laser gyroscope structure in Embodiment 1;

[0026] Figure 4 It is a schematic diagram of the laser gyroscope structure in Embodiment 2;

[0027] Figure 5 It is a schematic diagram of the laser gyroscope structure in Embodiment 3;

[0028] In the figure, 1 - integrated laser gyroscope cavity of the getter, exhaust pipe, and anode, 2 - installation chamber of the integrated mechanism of the getter, exhaust pipe, and anode, 3 - integrated mechanism of the getter, exhaust pipe, and anode, 4 - exhaust terminal, 5 - nickel strip, 6 - nickel strip, 7 - getter, 8 - exhaust pipe, 9 - end face of the exhaust terminal, 10 - exhaust hole, 11 - anode. Detailed Embodiments

[0029] This part is an embodiment of the present invention, used to explain and illustrate the technical solution of the present invention.

[0030] Please refer to Figure 1, Schematic diagram of the integrated structure of the getter, exhaust pipe and anode of the present invention. The integrated mechanism of the getter, exhaust pipe and anode includes an exhaust terminal 4, a nickel strip 5, a nickel strip 6, and a getter 7. For the exhaust terminal 4, please refer to Figure 2 , the exhaust terminal 4 includes an exhaust pipe 8, an exhaust terminal end face 9, an exhaust hole 10, and an anode 11. First, one end of the nickel strip 5 is spot-welded to the getter 7, and one end of the nickel strip 6 is spot-welded to the getter 7. The welding points of the nickel strip 5 and the nickel strip 6 with the getter should be on the same diameter of the getter 7. The middle hole of the getter 7 passes through the anode 11. The other ends of the nickel strip 5 and the nickel strip 6 are welded to the exhaust terminal end face 9 by laser welding or spot welding, forming the integrated mechanism 3 of the getter, exhaust pipe and anode.

[0031] Embodiment 1

[0032] As Figure 3 shown, a ring laser gyro contains two of the above-mentioned integrated mechanisms of the getter, exhaust pipe and anode. The integrated mechanism of the getter, exhaust pipe and anode is installed in two special chambers 2 on the side of the ring laser gyro cavity 1. The chamber 2 is a stepped hole. The bottom of the chamber 2 communicates with the capillary hole of the cavity through a fine hole. The side wall and the bottom of the chamber need to be polished to facilitate the activation of the getter by an external laser beam. The exhaust terminal end face 9 of the integrated mechanism 3 of the getter, exhaust pipe and anode is hermetically connected to the cavity 1 through indium sealing on the chamber 2, and the installation of the integrated mechanism 3 of the getter, exhaust pipe and anode is completed. The installation of another integrated mechanism 3 of the getter, exhaust pipe and anode is completed in the same way.

[0033] For the ring laser gyro equipped with the integrated mechanism of the getter, exhaust pipe and anode, by connecting to an external vacuum device, it is possible to achieve the acquisition of an ultra-high vacuum environment in the ring laser gyro cavity and the injection of the gain medium. When the inside of the cavity is in an ultra-high vacuum environment, irradiating the getter 7 with an external laser beam can activate the getter by heating and degassing.

[0034] Embodiment 2

[0035] Please refer to Figure 4 , a ring laser gyro includes: an integrated structure of the getter, exhaust pipe and anode as described above and a spherical anode made of the same material as this mechanism. The integrated mechanism of the getter, exhaust pipe and anode is installed in two special chambers 2 on the side of the ring laser gyro cavity 1. The chamber 2 is a stepped hole. The bottom of the chamber 2 communicates with the capillary hole of the cavity through a fine hole. The side wall and the bottom of the chamber need to be polished to facilitate the activation of the getter by an external laser beam.

[0036] The exhaust terminal end face 9 of the integrated mechanism 3 of the getter, exhaust pipe and anode is hermetically connected to the cavity 1 through indium sealing on the chamber 2, and the installation of the integrated mechanism 3 of the getter, exhaust pipe and anode is completed. The anode on the other side is indium-sealed to another chamber 2.

[0037] For a ring laser gyroscope equipped with the integrated getter, exhaust pipe, and anode mechanism, by connecting to an external vacuum device, it is possible to achieve the acquisition of an ultra-high vacuum environment inside the ring laser gyroscope and the injection of the gain medium. When the inside of the cavity is in an ultra-high vacuum environment, irradiating the getter 7 with an external laser beam can activate the getter by heating and degassing.

[0038] Embodiment III

[0039] Please refer to Figure 5 , a ring laser gyroscope includes one integrated getter, exhaust pipe, and anode mechanism and two cathodes. The integrated getter, exhaust pipe, and anode mechanism is installed in two dedicated chambers 2 on the side of the ring laser gyroscope cavity 1. The chamber 2 is a stepped hole, and the bottom of the chamber 2 communicates with the capillary hole of the cavity through a fine hole. The side wall and the bottom of the chamber need to be polished to facilitate the activation of the getter by the external laser beam.

[0040] The exhaust terminal end face 9 of the integrated getter, exhaust pipe, and anode mechanism 3 is hermetically sealed to the cavity 1 through indium sealing on the chamber 2, thus completing the installation of the integrated getter, exhaust pipe, and anode mechanism 3.

[0041] For a ring laser gyroscope equipped with the integrated getter, exhaust pipe, and anode mechanism, by connecting to an external vacuum device, it is possible to achieve the acquisition of an ultra-high vacuum environment inside the ring laser gyroscope and the injection of the gain medium. When the inside of the cavity is in an ultra-high vacuum environment, irradiating the getter 7 with an external laser beam can activate the getter by heating and degassing.

Claims

1. An integrated structure of a getter, an exhaust pipe, and an anode, characterized in that: The structure includes: an exhaust terminal, two nickel strips, and a getter; The exhaust terminal is cylindrical, with one end being a hemispherical anode; the other end has a blind hole as an exhaust pipe; There is an annular platform on the side of the exhaust terminal close to the anode; The bottom of the blind hole extends between the annular platform and the anode, and the exhaust terminal is provided with a vent hole in the radial direction to communicate the bottom of the blind hole with the outer surface of the exhaust terminal; The getter is annular, sleeved on the anode side of the exhaust terminal, and is welded and fixed to the lower end surface of the annular platform through two nickel strips.

2. The getter, exhaust pipe and anode integrated structure according to claim 1, characterized in that: The lower surface of the getter does not exceed the bottom plane of the hemispherical anode.

3. The getter, exhaust pipe and anode integrated structure according to claim 2, characterized in that: The annular getter is concentrically assembled with the anode and has no contact.

4. The getter, exhaust pipe and anode integrated structure according to claim 2, characterized in that: The roughness of the lower end surface of the annular platform is not greater than 1.6 microns. The inner ring of the lower end surface is welded with a nickel strip, and the outer ring is indium-sealed with the laser gyro cavity.

5. The getter, exhaust pipe and anode integrated structure according to claim 2, characterized in that: The material of the exhaust terminal is TU1 or TU2 oxygen-free copper or 4J36 invar alloy, and the exhaust pipe is used for cold welding and clamping.

6. The getter, exhaust pipe and anode integrated structure according to claim 2, characterized in that: The getter is activated by laser irradiation after the structure is installed in the laser gyro.

7. A laser gyroscope, characterized in that: The laser gyro includes: a laser gyro cavity, a cathode, two getters as described in any one of claims 1-5, an integrated structure of an exhaust pipe and an anode; One end of the laser gyro cavity is connected to the cathode, and two stepped holes are symmetrically opened on the laser gyro cavity as chambers to connect the integrated structure of the getter, the exhaust pipe and the anode; 8. A laser gyroscope, characterized in that: The laser gyro includes: a laser gyro cavity, a cathode, a getter as described in any one of claims 1-5, an integrated structure of an exhaust pipe and an anode, and a common anode; The laser gyro cavity is connected to the cathode and the common anode, and a stepped hole is also opened on the laser gyro cavity as a chamber for connecting the integrated structure of the getter, the exhaust pipe and the anode, and the integrated structure of the getter, the exhaust pipe and the anode is symmetric about the common anode.

9. A laser gyroscope, characterized in that: The laser gyro includes: a laser gyro cavity, two cathodes, a getter as described in any one of claims 1-5, an integrated structure of an exhaust pipe and an anode; One end of the laser gyro cavity is connected to the integrated structure of the getter, the exhaust pipe and the anode; Two cathodes are also symmetrically connected to the laser gyro cavity.

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