Double-position testing tool of optical fiber inertial measurement combination capable of being folded and stored

Abstract

The invention discloses an optical fiber inertial measurement combination double-position testing tool capable of being folded and stored. A tray is of a flat plate structure, and one side of the tray is rotationally connected with external monitoring equipment through a plurality of overturning hinges; the multiple tool supporting columns are rotationally connected with the lower end face of the flat plate structure and play a role in supporting the tray. The two product supporting columns are rotationally connected with the upper end face of the flat plate structure. The end, away from the flat plate structure, of the product supporting column is connected with the mounting flange through an overturning and limiting mechanism. The mounting flange is used for mounting a tested product; the overturning and limiting mechanism receives an instruction of external monitoring equipment and drives the tested product to rotate; when the testing tool is in a folded state, the tool supporting columns are folded to be parallel to the tray along the contact surfaces of the tool supporting columns and the tray; the product supporting columns are folded to be parallel to the tray along the contact faces of the product supporting columns and the tray. The overturning and limiting mechanism drives the mounting flange to rotate until the mounting flange is parallel to the tray; and the tray is vertical to the ground and is locked on external monitoring equipment.

Description

Technical Field

[0001] This invention relates to the field of aerospace equipment technology, and in particular to a dual-position test fixture for a foldable and retractable fiber optic inertial measurement unit. Background Technology

[0002] Existing fiber optic inertial measurement units typically employ two methods for position calibration testing: one involves placing the product in the test fixture and manually repositioning it, which is cumbersome and wastes manpower; the other involves placing the product on a turntable and controlling its movement to test different positions, which is simpler but requires a large turntable, occupies a significant area, is heavy, and is difficult to move, making it inconvenient to change test locations. The foldable fiber optic inertial measurement unit of this invention features a dual-position test fixture that is foldable and can be stored in a test cabinet, reducing floor space, enhancing the integration of the test equipment, and allowing the test cabinet to directly control the movement of the test fixture, simplifying the testing process. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a foldable and retractable dual-position test fixture for fiber optic inertial measurement units. This improves the structure of traditional test fixtures, giving them a foldable and retractable function for convenient test operation.

[0004] This invention discloses a foldable and retractable dual-position testing fixture for a fiber optic inertial measurement unit, comprising a flip hinge, a tray, a flipping and limiting mechanism, a mounting flange, a product support column, and a fixture support column; wherein,

[0005] The tray has a flat structure, and one side is rotatably connected to external monitoring equipment via multiple flip hinges.

[0006] Multiple tooling support columns are rotatably connected to the lower end face of the flat plate structure, providing support for the pallet;

[0007] Two product support columns are rotatably connected to the upper surface of the flat plate structure; the end of the product support column away from the flat plate structure is connected to the mounting flange through a flipping and limiting mechanism; the mounting flange is used to install the product under test; the flipping and limiting mechanism receives instructions from external monitoring equipment and drives the product under test to rotate.

[0008] When the test fixture is in the retracted state, the fixture support column folds along the contact surface with the pallet until it is parallel to the pallet; the product support column folds along the contact surface with the pallet until it is parallel to the pallet; the flipping and limiting mechanism drives the mounting flange to rotate until the mounting flange is parallel to the pallet; the pallet is perpendicular to the ground and locked to the external monitoring equipment.

[0009] Furthermore, in the above-mentioned tooling, the flipping and limiting mechanism includes: a rotating module and an operating rod. The rotating module is located at the top of the product support column and is connected to the mounting flange to drive the product under test to move together. The operating rod is located on both sides of the product support column and is used to control the movement of the rotating module.

[0010] Furthermore, in the above-mentioned tooling, the product support column is a groove structure, the bottom of the groove structure is fixedly connected to the tray, and the top of the groove structure is connected to the flipping and limiting mechanism.

[0011] Furthermore, in the above-mentioned tooling, the mounting flange is located above the rotating module, and moves the product under test together with the rotating module. The product under test is fixed to the mounting flange by bolts through the four screw holes provided on the mounting flange.

[0012] Furthermore, in the above-mentioned tooling, the tooling support column, the outer support part of the test bracket tooling, can be folded up and unfolded, and has a limiting mechanism to prevent the part from being accidentally folded up during use; the tooling support column is made using commercially available standard parts.

[0013] Furthermore, in the above-mentioned tooling, the operating steps are as follows:

[0014] Move the limit button of the tooling support column to unfold the tooling support column. After unfolding, return the limit button to its original position, and the tooling support column will enter the limit state.

[0015] Flip the tray downwards until it is parallel to the ground;

[0016] Product support column and mounting flange unfolding: unfold the product support column and mounting flange to a position perpendicular to the pallet, press down the operating levers on both sides of the product support column to put the mounting flange in the limit state;

[0017] The product to be tested is mounted on the mounting flange from top to bottom using bolts through the threaded holes on the mounting flange;

[0018] Connect the product under test to the test interface on the back panel of the health monitoring system via a test cable;

[0019] The product under test is rotated by a flipping and limiting mechanism. When the operating lever is pulled up, the flipping and limiting mechanism receives instructions from the external monitoring equipment to rotate the product under test to the designated position. When the operating lever is pressed, the product is limited.

[0020] The advantages of this invention compared to the prior art are:

[0021] (1) The present invention improves the structure of traditional test fixtures by adopting a flip hinge, which realizes the function of foldable storage of test fixtures, with small footprint and strong mobility;

[0022] (2) The present invention adopts a foldable test fixture, which is part of the test cabinet, enhances the integration of the test equipment, and solves the problem of cumbersome test process.

[0023] (3) The present invention adopts a joystick to control the movement of the test fixture, which solves the problem of inaccurate accuracy when the test fixture is moved manually.

[0024] (4) This invention designs a foldable and retractable dual-position test fixture for fiber optic inertial measurement units, improving the structure of traditional test fixtures and giving it a foldable and retractable function for convenient testing operations. Simultaneously, this invention designs a test fixture bracket, integrating the test fixture as part of the test cabinet, enhancing the integration of the testing equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the appearance of the test fixture of the present invention;

[0026] Figure 2 This is a schematic diagram of the flipping and limiting mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the tooling support column of the present invention;

[0028] Figure 4 The diagram shows the unfolding and retracting operation of the tooling support column of the present invention; (a) is a schematic diagram of the support column unfolding, and (b) is a schematic diagram of the support column retracting.

[0029] Figure 5 (a) is a schematic diagram of the tray unfolding operation of the present invention; (b) is a schematic diagram of the tray unfolding operation;

[0030] Figure 6 (a) is a schematic diagram of the unfolding operation of the support column and mounting flange of the present invention; (b) is a schematic diagram of the unfolding of the support column and mounting flange;

[0031] Figure 7 (a) is a schematic diagram of the installation of the product under test according to the present invention; (b) is a schematic diagram of the product under test after installation;

[0032] Figure 8 (a) is a schematic diagram of the wiring of the present invention; (b) is a schematic diagram after wiring and (c) is a schematic diagram before wiring.

[0033] Figure 9 (a) is a schematic diagram of the device flipping according to the present invention; (b) is a schematic diagram of the device before flipping;

[0034] Figure 10 This is a network partitioning diagram of the model of the present invention;

[0035] Figure 11 This is a diagram showing the fixed constraint loading of the model in this invention.

[0036] Figure 12 This is a force loading diagram of the simulation model of the present invention;

[0037] Figure 13 The figure shows the simulation results of this invention;

[0038] Figure 14 This is a cloud diagram showing the overall deformation of the present invention;

[0039] Figure 15 This is a diagram showing the maximum stress on the flip hinge shaft of the present invention.

[0040] Figure 16 This is a diagram showing the maximum deformation of the flip hinge shaft of the present invention. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0042] like Figure 1 As shown, this invention discloses a foldable and retractable dual-position testing fixture for an optical fiber inertial measurement unit, comprising a flip hinge 1, a tray 2, a flipping and limiting mechanism 3, a mounting flange 4, a product support column 5, and a fixture support column 6; wherein,

[0043] The tray 2 is a flat structure, and one side is rotatably connected to external monitoring equipment via multiple flip hinges 1;

[0044] Multiple tooling support columns 6 are rotatably connected to the lower end face of the flat plate structure, providing support for the pallet 2;

[0045] Two product support columns 5 are rotatably connected to the upper surface of the flat plate structure; the end of the product support column 5 away from the flat plate structure is connected to the mounting flange 4 through the flipping and limiting mechanism 3; the mounting flange 4 is used to install the product under test; the flipping and limiting mechanism 3 receives instructions from external monitoring equipment and drives the product under test to rotate.

[0046] When the test fixture is in the retracted state, the fixture support column 6 folds along the contact surface with the tray 2 until it is parallel to the tray 2; the product support column 5 folds along the contact surface with the tray 2 until it is parallel to the tray 2; the flipping and limiting mechanism 3 drives the mounting flange 4 to rotate until the mounting flange 4 is parallel to the tray 2; the tray 2 is perpendicular to the ground and locked to the external monitoring equipment.

[0047] Preferably, the flipping and limiting mechanism 3 includes: a rotating module 31 and an operating rod 32. The rotating module is located at the top of the product support column 5 and is connected to the mounting flange 4 to drive the product under test to move together. The operating rod 32 is located on both sides of the product support column 5 and is used to control the movement of the rotating module 31.

[0048] Preferably, the product support column 5 is a groove structure, the bottom of which is fixedly connected to the tray 2; the top of which is connected to the flipping and limiting mechanism 3.

[0049] Preferably, the mounting flange 4 is located above the rotating module 31, and moves the product under test together with the rotating module 31. The product under test is fixed to the mounting flange 4 by bolts through the four screw holes provided on the mounting flange 4.

[0050] Preferably, the tooling support column 6, the outer support part of the tooling of the test bracket, can be folded up and unfolded, and has a limiting mechanism to prevent the part from being accidentally folded up during use; the tooling support column is made using commercially available standard parts.

[0051] Preferably, the operation steps are as follows:

[0052] Move the limit button of the tooling support column 6 to unfold the tooling support column 6. After unfolding, return the limit button to its original position, and the tooling support column 6 will enter the limit state.

[0053] Flip tray 2 downwards until it is parallel to the ground;

[0054] Product support column 5 and mounting flange unfold: unfold product support column 5 and mounting flange 4 to a position perpendicular to tray 2, press down the operating levers 32 on both sides of product support column 5 to put mounting flange 4 in the limited position;

[0055] The product to be tested is mounted on the mounting flange 4 using bolts through the screw holes on the mounting flange 4 from top to bottom.

[0056] Connect the product under test to the test interface on the back panel of the health monitoring system via a test cable;

[0057] The product under test is rotated by the flipping and limiting mechanism 3. When the operating lever 32 is pulled up, the flipping and limiting mechanism 3 receives the instruction from the external monitoring equipment, rotates the product under test to the designated position, and presses the operating lever 32 to limit it.

[0058] Example

[0059] The test fixture is designed to facilitate the placement, fixation, and 90° rotation of the test piece. The test fixture is installed at the lower part of the rear panel of the test cabinet and can be folded for easy user operation and space saving. When folded, it can be transported as part of the equipment.

[0060] The schematic diagram of the test fixture is shown below. Figure 1 As shown.

[0061] The functions of each part and mechanism of the test bracket fixture are as follows:

[0062] (1) Flip hinge: The hinge is used to complete the installation of the test bracket fixture and the rear panel of the unit health monitoring equipment; the hinge is used to complete the 90° flip of the test bracket fixture (for the storage of the test bracket fixture); the hinge is used to support the load-bearing capacity of the support box at one end of the test bracket fixture.

[0063] (2) Pallet: The main structure of the test bracket fixture, the mechanism and parts of the test bracket fixture are installed on the pallet;

[0064] (3) Flipping and Limiting Mechanism: This mechanism operates by flipping the measured part from 0° to 90°. It consists of a rotating module and an operating lever. A schematic diagram of the flipping and limiting mechanism is shown below. Figure 2 As shown, the rotating module is located at the top of the product support column and connected to the mounting flange. The operating levers are located on both sides of the product support column and are used to control the movement of the rotating module. Pulling up the two operating levers outwards puts the product in a rotatable state. Rotating the operating levers rotates the product being tested. The product's rotation stroke is 0°-90°. Outside the stroke angle, the mechanism is in a limited state and cannot rotate. Pressing down the two operating levers puts the product in a limited state. During the product's rotation, the rotation angle direction is in a damped state to prevent accidental operation and falls during rotation.

[0065] (4) Mounting flange: Installed on the rotating module of the flipping and limiting mechanism, it is used for the installation of products and test bracket fixtures. The product to be tested is installed on the mounting flange through the four screw holes of the mounting flange with bolts.

[0066] (5) Product support column: The flipping and limiting mechanism and the rotating module are installed on the pallet through the product support column; the product support column can be folded up by the contact surface with the pallet.

[0067] (6) Fixture support column: The external support component of the test bracket fixture, which can be folded away and has a limiting mechanism to prevent accidental folding away during use; a schematic diagram of the fixture support column is shown below. Figure 3 As shown, rotating the limit button controls the tooling support column to either limit mode or motion mode.

[0068] The steps for using the test bracket fixture are as follows (starting from the unfolding step):

[0069] (1) Tooling support column deployment operation: Move the tooling support column limit button to deploy the tooling support column. After deployment, return the limit button to its original position, and the tooling support column will enter the limit position. Figure 4 As shown;

[0070] (2) Unfold the tray: Flip the tray downwards to a position of 0° with the ground, such as Figure 5 As shown;

[0071] (3) Supporting and installing the flange: Extend the supporting and installing flange to a 90° position relative to the pallet, press the operating lever to bring the installing flange to its limit position, such as... Figure 6 As shown;

[0072] (4) Installation of the product under test: The product under test is installed from top to bottom using bolts through the four screw holes on the mounting flange, such as... Figure 7 As shown;

[0073] (5) Wiring: Connect the test cable to the test interface on the rear panel of the critical health monitoring system, such as... Figure 8 As shown;

[0074] (6) Equipment Tilting: The test piece rotates via a tilting and limiting mechanism. Pulling up the operating levers at both ends of the tilting and limiting mechanism rotates the product to a 90° position. Pressing down the operating levers then limits the rotation. Figure 9 As shown;

[0075] Due to the significant weight of the product under test, the test tray fixture must ensure normal operation under the product's weight load and guarantee the product's safety during use. The project team conducted mechanical simulations of the test tray fixture, meshing the 3D model into sections for the test tray fixture itself, such as... Figure 10 As shown.

[0076] The constraints are as follows: the test bracket fixture provides a fixed constraint on the mounting position of the equipment's rear panel; the test bracket fixture also provides a fixed constraint on its contact surface with the ground. For example... Figure 11 As shown.

[0077] During the simulation, the tested component is assumed to weigh 60kg, and a force of 600N is applied to the load-bearing portion of the component. Figure 12 As shown.

[0078] The solution only provides a detailed analysis of a few key load-bearing components:

[0079] (1) Install flange:

[0080] The maximum stress occurred at the center of the mounting bracket of the test piece, at 97.887 MPa. Figure 13 and Figure 14 As shown.

[0081] The maximum deformation occurred at the edge of the mounting bracket of the tested part, which was 0.47737 mm.

[0082] Based on the above analysis, when the test piece is installed, the maximum stress value is 97.887 MPa, formed in the middle of the mounting bracket. The mounting bracket is made of stainless steel with a yield stress of 205 MPa. The maximum stress is less than the material's yield strength, and the safety factor is 2.09, which is greater than a safety factor of 1.5. The maximum deformation is 0.47737 mm at the edge of the mounting bracket.

[0083] Simulation analysis data shows that the equipment can meet the above usage requirements.

[0084] (2) Flip the hinge axis

[0085] The maximum stress of the flip hinge shaft is shown in the figure. Figure 15 The maximum stress is 4.7303 MPa.

[0086] The maximum deformation of the rotating shaft is shown in the figure. Figure 16 The maximum deformation is 0.00223 mm, which is negligible.

[0087] The maximum stress on the rotating shaft is 4.7303 MPa. The shaft is made of stainless steel and has a diameter of 8 mm, which is less than the allowable shear stress of approximately 14 MPa. The maximum deformation of the rotating shaft is 0.00223 mm, which is negligible.

[0088] Simulation analysis data shows that the equipment can meet the above usage requirements.

[0089] (3) Tooling support column

[0090] The tooling support column is a purchased standard component. The nominal load-bearing capacity of a single standard component is 108kg, which can meet the support strength requirements.

[0091] The contents not described in detail in the specification are common knowledge to those skilled in the art.

Claims

1. A foldable and retractable dual-position testing fixture for fiber optic inertial measurement units, characterized in that: Includes a flip hinge (1), a tray (2), a flipping and limiting mechanism (3), a mounting flange (4), a product support column (5), and a tooling support column (6); among which, The tray (2) is a flat plate structure, and one side is rotatably connected to an external monitoring device via multiple flip hinges (1); Multiple tooling support columns (6) are rotatably connected to the lower end face of the flat plate structure, providing support for the pallet (2); Two product support columns (5) are rotatably connected to the upper end of the flat plate structure; the end of the product support column (5) away from the flat plate structure is connected to the mounting flange (4) through a flipping and limiting mechanism (3); the mounting flange (4) is used to install the product under test; the flipping and limiting mechanism (3) receives instructions from external monitoring equipment and drives the product under test to rotate; When the test fixture is in the retracted state, the fixture support column (6) is folded along the contact surface with the tray (2) until it is parallel to the tray (2); the product support column (5) is folded along the contact surface with the tray (2) until it is parallel to the tray (2); the flipping and limiting mechanism (3) drives the mounting flange (4) to rotate until the mounting flange (4) is parallel to the tray (2); the tray (2) is perpendicular to the ground and locked to the external monitoring equipment.

2. The dual-position test fixture for a foldable and retractable fiber optic inertial measurement unit according to claim 1, characterized in that, The flipping and limiting mechanism (3) includes a rotating module (31) and an operating rod (32). The rotating module is located at the top of the product support column (5) and is connected to the mounting flange (4) to drive the product under test to move together. The operating rod (32) is located on both sides of the product support column (5) and is used to control the movement of the rotating module (31).

3. The dual-position test fixture for a foldable and retractable fiber optic inertial measurement unit according to claim 1, characterized in that, The product support column (5) is a groove structure, the bottom of which is fixedly connected to the tray (2); the top of which is connected to the flipping and limiting mechanism (3).

4. The dual-position test fixture for a foldable and retractable fiber optic inertial measurement unit according to claim 2, characterized in that, The mounting flange (4) is located above the rotating module (31). Together with the rotating module (31), it drives the product under test to move. Through the four screw holes provided on the mounting flange (4), the product under test is fixed to the mounting flange (4) by bolts.

5. The dual-position test fixture for a foldable and retractable fiber optic inertial measurement unit according to claim 1, characterized in that, The tooling support column (6) is the outer support part of the tooling of the test bracket. It can be folded up and unfolded. It has a limiting mechanism to prevent the part from being accidentally folded up during use. The tooling support column is made using commercially available standard parts.

6. The dual-position test fixture for a foldable and retractable fiber optic inertial measurement unit according to claim 2, characterized in that, The operating steps are as follows: Move the limit button of the tooling support column (6) to unfold the tooling support column (6). After unfolding, return the limit button to its original position and the tooling support column (6) will enter the limit state. Flip the tray (2) downwards until it is parallel to the ground; Product support column (5) and mounting flange unfold: unfold the product support column (5) and mounting flange (4) to a position perpendicular to the tray (2), press down the operating levers (32) on both sides of the product support column (5) to put the mounting flange (4) in a limited position; The product to be tested is mounted on the mounting flange (4) from top to bottom using bolts through the screw holes on the mounting flange (4); Connect the product under test to the test interface on the back panel of the health monitoring system via a test cable; The product under test is rotated by the flipping and limiting mechanism (3), the operating lever (32) is pulled up, the flipping and limiting mechanism (3) receives the instruction from the external monitoring equipment, rotates the product under test to the specified position, and presses the operating lever (32) to limit it.

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