Tool structure for impact vibration test of triaxial fiber-optic gyroscope and use method of tool structure

Abstract

The invention relates to a tool structure for an impact vibration test of a triaxial fiber-optic gyroscope, and the tool structure is an integrated processing molding structure, and comprises a chassis and a table body, a plurality of outer opening type waist-shaped holes are uniformly distributed in the outer edge part of the chassis along the circumferential direction, and the tool is fixed on a gyroscope test turntable by penetrating screws; the table body is arranged at the upper end of the chassis in a center alignment manner, and is a hollow cubic table body consisting of four side surfaces and a top surface; gyroscope positioning holes are formed in the centers of the top surface and two adjacent side surfaces of the table body, the axes of the gyroscope positioning holes in the three surfaces intersect at one point, and the aperture of each gyroscope positioning hole is consistent with the size of a positioning table of a triaxial fiber-optic gyroscope to be tested; screw through holes are formed in the peripheries of the gyroscope positioning holes in the three faces, and the three triaxial fiber-optic gyroscopes of the same model are fixedly installed on the three orthogonal faces by penetrating screws. According to the invention, one-time clamping of three triaxial fiber-optic gyroscopes can be realized, three-degree-of-freedom simultaneous output during shock vibration can be satisfied, and the test efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fiber optic gyroscope testing, and relates to a tooling structure for a three-axis fiber optic gyroscope shock vibration test and a use method thereof. Background Art

[0002] Fiber optic gyroscope is an optical gyroscope based on the Sagnac effect. As a typical representative of the new generation of all-solid-state gyroscopes, it has the advantages of high reliability, long life, small size, low power consumption, good linearity, etc. It is now widely used as an inertial sensitive element in various platform-type, strapdown-type and other inertial systems. The three-axis fiber optic gyroscope realizes three-degree-of-freedom sensitive output through device sharing, with a high degree of integration and wide application. Taking into account the system use environment requirements, in order to fully verify the output characteristics of the gyroscope in various environments, it is necessary to conduct a directional test on the working conditions of the system in an impact and vibration environment. The existing impact and vibration test tooling can only complete a single degree of freedom test in a single impact and vibration direction, and cannot achieve simultaneous testing of three degrees of freedom, so the test efficiency is low. Therefore, there is an urgent need for a tooling that can be used for simultaneous testing of three degrees of freedom of a three-axis fiber optic gyroscope under an impact and vibration state. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a tooling structure for a three-axis fiber optic gyroscope shock vibration test and a method for using the tooling structure for improving the test efficiency.

[0004] One of the above objects of the present invention is achieved by the following technical solution:

[0005] A tooling structure for shock vibration testing of a three-axis fiber optic gyroscope, the tooling is an integrally processed structure, including a chassis and a table body; the chassis adopts a circular chassis, and a plurality of externally open waist-shaped holes are evenly arranged along the circumferential direction on the outer edge of the circular chassis, and the tooling is fixed to a gyroscope test turntable by screws inserted into the plurality of externally open waist-shaped holes; the table body is arranged at the upper end of the chassis in a center-aligned manner, and the table body adopts a hollow cubic table body consisting of four side surfaces and a top surface; gyroscope positioning holes are arranged on the top surface of the table body and at the center positions of two adjacent side surfaces, the axes of the gyroscope positioning holes on the three surfaces intersect at one point, and the apertures of the gyroscope positioning holes are consistent with the size of the positioning table of the three-axis fiber optic gyroscope to be tested; screw through holes are arranged on the peripheries of the gyroscope positioning holes on the three surfaces, and three three-axis fiber optic gyroscopes of the same model are fixedly installed on three orthogonal surfaces by inserting screws.

[0006] Moreover, square holes for achieving weight reduction are arranged in the middle of the chassis and on the two side surfaces of the platform body where the gyro positioning holes are not arranged.

[0007] Moreover, the tooling is a structure that is a hard stainless steel block that is subjected to a tempering treatment after being milled.

[0008] The second objective of the present invention is achieved by the following technical solutions:

[0009] A method for using a tooling structure for a three-axis fiber optic gyroscope shock vibration test comprises the following steps:

[0010] Step 1: Support the tooling on the gyro test turntable through the chassis, and fix the tooling on the impact vibration test bench by screws passing through multiple waist-shaped holes on the tooling chassis;

[0011] Step 2, a No. 1 three-axis fiber optic gyroscope, a No. 2 three-axis fiber optic gyroscope, and a No. 3 three-axis fiber optic gyroscope of the same model are respectively arranged on the top surface of the platform body and the two side surfaces where the gyro positioning holes are arranged, and the gyro positioning holes are used to perform positioning matching with the corresponding positioning truncated table of the three-axis fiber optic gyroscope, and the three-axis fiber optic gyroscope is fixed to the corresponding surface by screws installed in the threaded through holes on the corresponding surface;

[0012] Step 3, setting the vibration direction of the vibration platform in the up-down direction, the Z-axis of the No. 1 three-axis fiber optic gyroscope fixed on the top of the tooling is consistent with the impulse vibration direction, the X-axis of the No. 2 three-axis fiber optic gyroscope fixed on one side is consistent with the impulse vibration direction, and the Y-axis of the No. 2 three-axis fiber optic gyroscope fixed on the other side is consistent with the impulse vibration direction;

[0013] Step 3, start the shock vibration test setting, and conduct the first shock vibration test. The three gyroscopes respectively perform sensitive output along different output axes. Among them, the X sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output: the Y sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output: the Z sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output;

[0014] Step 4, after the first shock vibration test is completed, the installation positions of the three three-axis fiber optic gyroscopes are replaced, and the No. 1 three-axis fiber optic gyroscope is installed at the installation position of the No. 2 three-axis fiber optic gyroscope during the first shock vibration test, and the No. 2 three-axis fiber optic gyroscope is installed at the installation position of the No. 3 three-axis fiber optic gyroscope during the first shock vibration test. The three three-axis fiber optic gyroscope is installed at the installation position of the No. 1 three-axis fiber optic gyroscope during the first shock vibration test; start the shock vibration test setting, and conduct the second shock vibration test. The three gyroscopes perform sensitive output along different output axes respectively, among which the Y sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the Z sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the X sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output;

[0015] Step 5, after the second shock vibration test, the installation positions of the three three-axis fiber optic gyroscopes are replaced, the No. 1 three-axis fiber optic gyroscope is installed at the installation position of the No. 3 three-axis fiber optic gyroscope during the first shock vibration test, the No. 2 three-axis fiber optic gyroscope is installed at the installation position of the No. 1 three-axis fiber optic gyroscope during the first shock vibration test, and the No. 3 three-axis fiber optic gyroscope is installed at the installation position of the No. 2 three-axis fiber optic gyroscope during the first shock vibration test; start the shock vibration test setting, and conduct the third shock vibration test. The three gyroscopes perform sensitive output along different output axes respectively, among which the Z sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the X sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the Y sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output.

[0016] The advantages and positive effects of the present invention are:

[0017] 1. The present invention designs three orthogonal mounting surfaces, which can realize one-time clamping of three three-axis fiber optic gyroscopes and meet the sensitive output of three degrees of freedom in a single impulse vibration direction, greatly improving the test efficiency and realizing the integrated test of the three-axis fiber optic gyroscope.

[0018] 2. The tooling of the present invention is a support structure similar to a table body made by milling high-strength hard stainless steel and then quenching and tempering. On the basis of ensuring the mechanical strength of the tooling, the volume and weight of the tooling are greatly reduced.

[0019] 3. The gyro mounting surface and the mounting surface of the test platform of the present invention can be adjusted in real time according to the size of the gyro and the pitch circle size of the reserved threaded hole of the test turntable, thereby realizing the impact vibration test of three-axis fiber optic gyroscopes of different volumes. That is, it is only necessary to adjust the gyro mounting interface to adapt to gyroscopes of different sizes. If the gyro size is large, the tooling size can be enlarged by a certain proportion on the basis of meeting the effective mounting requirements of the test platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the tooling structure for the impact vibration test of the three-axis fiber optic gyroscope of the present invention;

[0021] Figure 2 2a is a plan view of the tooling structure for the vibration test of the three-axis fiber optic gyroscope of the present invention, 2b is a schematic diagram of 2a in the direction of A; 2c is a schematic diagram of 2a in the direction of B;

[0022] Figure 3 It is a reference diagram of the use state of the tooling structure of the three-axis fiber optic gyroscope shock vibration test of the present invention;

[0023] Figure 4 yes Figure 3 3D exploded view of . DETAILED DESCRIPTION

[0024] The structure of the present invention is further described below with reference to the accompanying drawings and by way of examples. It should be noted that the present examples are descriptive rather than restrictive.

[0025] A tooling structure for shock vibration test of a three-axis fiber optic gyroscope, see Figure 1-Figure 4 The tooling is an integrally processed structure, including a chassis 1 and a table 2. The chassis adopts a circular chassis, and a plurality of externally open waist-shaped holes 1.1 are evenly distributed along the circumferential direction on the outer edge of the circular chassis, which are used to pass screws to fix the tooling on the gyro test turntable. Furthermore, a square hole 1.2 is provided in the middle of the chassis to reduce weight and facilitate testing. The table is arranged at the upper end of the chassis in a center-aligned manner, and the table adopts a hollow cubic table consisting of four side surfaces and a top surface. Gyro positioning holes 2.2 are provided at the center positions of the top surface of the table and two adjacent side surfaces. The axes of the positioning holes on the three surfaces intersect at one point, and the aperture of the positioning holes is consistent with the size of the positioning table punched on the fiber optic gyroscope to be tested. Screw through holes 2.3 are provided on the periphery of the positioning holes on the three surfaces, which are used to pass screws to fix the fiber optic gyroscope.

[0026] In order to reduce the weight of the tooling, square holes 2.1 are provided on the two side surfaces of the platform body where no gyro positioning holes are provided.

[0027] The tooling is made of hard stainless steel, which is milled according to the designed shape and size and then subjected to tempering. Specifically, the tooling processing process in the present invention is:

[0028] The bracket structure similar to the table shown in the figure is made by milling hard stainless steel. The upper end surface and the front and right sides are processed with Φd 陀螺 The gyro positioning hole has a height of h from the bottom surface. Each of the three mounting surfaces has four screw holes for screw locking. The intersection of the three mounting surfaces has an orthogonal mark (the intersection is in the attached Figure 1 The lower chassis is processed with a 腰孔 The four mounting waist holes of the width are formed by modulation after the final processing is completed.

[0029] The length, width and height of the platform 支架 The design is based on the external dimensions of the gyroscope being measured and should meet the following requirements: a. 支架 =a 陀螺 / 0.6, where a 陀螺 Refers to the maximum size of the gyro mounting surface.

[0030] a 腰孔 , Φd 外 , Φd 转台 is the key dimension for the connection between the fixture and the test turntable, where a 腰孔 , Φd 转台 Designed according to the threaded hole and threaded hole pitch circle reserved for the turntable, the outer circle size of the lower end face is Φd 外 Should satisfy: Φd 外 =1.25*Φd 转台。 Among them, Φd 外 Refers to the outer diameter of the chassis, Φd 转台 Refers to the pitch circle size of the waist hole used to connect the tooling and test platform.

[0031] The method for performing an impact vibration test on a three-axis fiber optic gyroscope of the same model using the tooling structure for the impact vibration test of the three-axis fiber optic gyroscope is as follows:

[0032] Step 1, support the tooling on the gyro test turntable 6 through the chassis, and fix the tooling on the impact vibration test bench by screws 7 passing through multiple waist-shaped holes on the tooling chassis;

[0033] Step 2, the first three-axis fiber optic gyroscope, the second three-axis fiber optic gyroscope, and the third three-axis fiber optic gyroscope of the same model are respectively arranged on the top surface of the platform body and the two side surfaces where the gyro positioning holes are arranged, and the gyro positioning holes are used to position and match with the corresponding positioning truncated table of the three-axis fiber optic gyroscope, and the three-axis fiber optic gyroscope is fixed to the corresponding surface by screws 8 installed in the threaded through holes on the corresponding surfaces;

[0034] Step 3, setting the vibration direction of the vibration platform in the up-down direction, the Z-axis of the No. 1 three-axis fiber optic gyroscope 3 fixed on the top of the tooling is consistent with the impulse vibration direction, the X-axis of the No. 2 three-axis fiber optic gyroscope 4 fixed on one side is consistent with the impulse vibration direction, and the Y-axis of the No. 2 three-axis fiber optic gyroscope 5 fixed on the other side is consistent with the impulse vibration direction;

[0035] Step 3, start the shock vibration test setting, and conduct the first shock vibration test. The three gyroscopes respectively perform sensitive output along different output axes. Among them, the X sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output: the Y sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output: the Z sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output;

[0036] Step 4, after the first shock vibration test is completed, the installation positions of the three three-axis fiber optic gyroscopes are replaced, and the No. 1 three-axis fiber optic gyroscope is installed at the installation position of the No. 2 three-axis fiber optic gyroscope during the first shock vibration test, and the No. 2 three-axis fiber optic gyroscope is installed at the installation position of the No. 3 three-axis fiber optic gyroscope during the first shock vibration test. The three three-axis fiber optic gyroscope is installed at the installation position of the No. 1 three-axis fiber optic gyroscope during the first shock vibration test; start the shock vibration test setting, and conduct the second shock vibration test. The three gyroscopes perform sensitive output along different output axes respectively, among which the Y sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the Z sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the X sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output);

[0037] Step 5, after the second shock vibration test is completed, the installation positions of the three three-axis fiber optic gyroscopes are replaced, and the No. 1 three-axis fiber optic gyroscope is installed at the installation position of the No. 3 three-axis fiber optic gyroscope during the first shock vibration test, and the No. 2 three-axis fiber optic gyroscope is installed at the installation position of the No. 1 three-axis fiber optic gyroscope during the first shock vibration test, and the No. 3 three-axis fiber optic gyroscope is installed at the installation position of the No. 2 three-axis fiber optic gyroscope during the first shock vibration test; start the shock vibration test setting, and conduct the third shock vibration test. The three gyroscopes perform sensitive output along different output axes respectively, among which the Z sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the X sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the Y sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output);

[0038] As required, each gyroscope must complete vibration tests in three directions, that is, each vibration direction is parallel to the gyroscope's sensitive axes X, Y, and Z respectively.

[0039] Through three disassembly and assembly and three vibrations, the three gyroscopes can be tested under vibration conditions at three positions (X, Y, and Z are parallel to the vibration direction, respectively). Compared with the general situation where three disassembly and assembly and three vibrations can only test one gyroscope in three positions, the efficiency can be greatly improved.

[0040] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A tooling structure for shock vibration testing of a three-axis fiber optic gyroscope, characterized in that: The tooling is an integrally processed structure, comprising a chassis and a table body; the chassis is a circular chassis, and a plurality of externally open waist-shaped holes are evenly distributed along the circumferential direction on the outer edge of the circular chassis, and the tooling is fixed to the gyro test turntable by screws inserted into the plurality of externally open waist-shaped holes; the table body is arranged at the upper end of the chassis in a center-aligned manner, and the table body is a hollow cubic table body consisting of four side surfaces and a top surface; gyro positioning holes are arranged on the top surface of the table body and at the center positions of two adjacent side surfaces, and the axes of the gyro positioning holes on the three surfaces intersect at one point, and the aperture of the gyro positioning holes is consistent with the size of the positioning table of the three-axis fiber optic gyroscope to be tested; screw through holes are arranged on the periphery of the gyro positioning holes on the three surfaces, and by inserting screws, three three-axis fiber optic gyroscopes of the same model can be fixedly installed on three orthogonal surfaces.

2. The tooling structure for shock vibration testing of a three-axis fiber optic gyroscope according to claim 1, characterized in that: Square holes for achieving weight reduction are arranged in the middle of the chassis and on the two side surfaces of the platform body where no gyro positioning holes are arranged.

3. The tooling structure for shock vibration testing of a three-axis fiber optic gyroscope according to claim 1, characterized in that: The tooling is a hard stainless steel block that is subjected to milling and then quenched and tempered.

4. A method for using the tooling structure for shock vibration testing of a three-axis fiber optic gyroscope according to any one of claims 1 to 3, characterized in that: The steps include: Step 1: Support the tooling on the gyro test turntable through the chassis, and fix the tooling on the impact vibration test bench by screws passing through multiple waist-shaped holes on the tooling chassis; Step 2, a No. 1 three-axis fiber optic gyroscope, a No. 2 three-axis fiber optic gyroscope, and a No. 3 three-axis fiber optic gyroscope of the same model are respectively arranged on the top surface of the platform body and the two side surfaces where the gyro positioning holes are arranged, and the gyro positioning holes are used to perform positioning matching with the corresponding positioning truncated table of the three-axis fiber optic gyroscope, and the three-axis fiber optic gyroscope is fixed to the corresponding surface by screws installed in the threaded through holes on the corresponding surface; Step 3, setting the vibration direction of the vibration platform in the up-down direction, the Z-axis of the No. 1 three-axis fiber optic gyroscope fixed on the top of the tooling is consistent with the impulse vibration direction, the X-axis of the No. 2 three-axis fiber optic gyroscope fixed on one side is consistent with the impulse vibration direction, and the Y-axis of the No. 2 three-axis fiber optic gyroscope fixed on the other side is consistent with the impulse vibration direction; Step 3, start the shock vibration test setting, and conduct the first shock vibration test. The three gyroscopes respectively perform sensitive output along different output axes. Among them, the X sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output: the Y sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output: the Z sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no inductive output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious inductive output; Step 4, after the first shock vibration test is completed, the installation positions of the three three-axis fiber optic gyroscopes are replaced, and the No. 1 three-axis fiber optic gyroscope is installed at the installation position of the No. 2 three-axis fiber optic gyroscope during the first shock vibration test, and the No. 2 three-axis fiber optic gyroscope is installed at the installation position of the No. 3 three-axis fiber optic gyroscope during the first shock vibration test. The three three-axis fiber optic gyroscope is installed at the installation position of the No. 1 three-axis fiber optic gyroscope during the first shock vibration test; start the shock vibration test setting, and conduct the second shock vibration test. The three gyroscopes perform sensitive output along different output axes respectively, among which the Y sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the Z sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the X sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; Step 5, after the second shock vibration test, the installation positions of the three three-axis fiber optic gyroscopes are replaced, the No. 1 three-axis fiber optic gyroscope is installed at the installation position of the No. 3 three-axis fiber optic gyroscope during the first shock vibration test, the No. 2 three-axis fiber optic gyroscope is installed at the installation position of the No. 1 three-axis fiber optic gyroscope during the first shock vibration test, and the No. 3 three-axis fiber optic gyroscope is installed at the installation position of the No. 2 three-axis fiber optic gyroscope during the first shock vibration test; start the shock vibration test setting, and conduct the third shock vibration test. The three gyroscopes perform sensitive output along different output axes respectively, among which the Z sensitive axis of the No. 1 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Y sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the X sensitive axis of the No. 2 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the Y and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output; the Y sensitive axis of the No. 3 three-axis fiber optic gyroscope is parallel to the vibration direction, and basically has no induced output, and the X and Z sensitive axes are perpendicular to the vibration direction, and both have obvious induced output.

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