Vibration test fixture shared by conformal antenna and radio frequency front end of conformal antenna

Abstract

The utility model discloses a vibration test fixture shared by a conformal antenna and a radio frequency front end thereof, and relates to the field of antenna production equipment, the vibration test fixture comprises a rotating mechanism and a fixing mechanism, the rotating mechanism comprises a base and a turntable, one end of the base is connected with a vibration test bench, and the other end of the base is rotatably connected with the turntable through a first cylindrical boss; the fixing mechanism comprises a conformal antenna mounting piece used for being matched and connected with the conformal antenna and a radio frequency front end mounting piece used for being matched and connected with the radio frequency front end, and the conformal antenna mounting piece and the radio frequency front end mounting piece are oppositely arranged and connected to the other end face of the rotary table; according to the utility model, the conformal antenna mounting piece and the radio frequency front end mounting piece are arranged on the same rotary table plane, and the rotary table plane can be fixed after being rotated by any angle, so that the problem that the conformal antenna and the radio frequency front end vibration test fixture cannot be shared and cannot rotate is solved.

Description

A vibration test fixture shared by a conformal antenna and its RF front end Technical Field

[0001] This utility model relates to the field of antenna manufacturing equipment, specifically to a vibration testing fixture shared by a conformal antenna and its radio frequency front end. Background Technology

[0002] Against the backdrop of rapid development in the era of information warfare, aviation technology continues to innovate. Conformal antennas, as special antennas conforming to the fuselage skin, have been widely used in various new airborne platforms due to their significant advantages, such as making full use of limited airborne installation space, possessing excellent electrical performance, light weight, and low air resistance. Conformal antennas are typical integrated airborne functional structures; in addition to meeting specific electrical performance indicators, they must also meet environmental adaptability requirements, among which vibration testing is a key aspect of environmental adaptability assessment.

[0003] Vibration test fixtures are crucial devices in vibration testing. Mounted on a vibration test bench, they secure the test piece according to actual installation conditions, simulating vibration conditions in real-world usage environments. However, in practical applications, conformal antennas and their RF front-ends often have significantly different installation conditions. For example, conformal antennas are typically mounted on curved fuselage skins, while the RF front-end is mounted on a flat area behind the antenna. Therefore, two different vibration test fixtures often need to be custom-designed. This separate design approach renders the vibration test fixtures non-common, extending the development cycle and significantly increasing design costs.

[0004] Furthermore, existing vibration test fixtures are typically custom-designed based on the installation position of the test piece, and cannot be rotated when used with a vibration test bench. However, different models of conformal antennas have different installation angles when installed, which makes it difficult for the currently customized conformal antenna and its RF front-end vibration test fixtures to be used for testing conformal antennas with different installation angles. This severely limits the reusability of the fixtures, resulting in resource waste and further increasing testing costs and technical barriers. Summary of the Invention

[0005] The purpose of this utility model is to provide a vibration test fixture for conformal antennas and their RF front-ends. This vibration test fixture solves the problem that conformal antenna mounting parts and RF front-end mounting parts cannot be shared and cannot be rotated by setting the conformal antenna mounting parts and RF front-end mounting parts together on the same turntable plane, and the turntable plane can be rotated at any angle and then fixed.

[0006] This utility model is achieved through the following technical solution:

[0007] A vibration test fixture shared by a conformal antenna and its RF front end includes:

[0008] A rotating mechanism, comprising a base and a turntable, wherein one end of the base is connected to a vibration test bench, and the other end of the base is rotatably connected to the turntable via a first cylindrical boss;

[0009] The fixing mechanism includes a conformal antenna mounting component for matching and connecting a conformal antenna and an RF front-end mounting component for matching and connecting an RF front-end. The conformal antenna mounting component and the RF front-end mounting component are arranged opposite to each other and connected to the other end face of the turntable.

[0010] In this design, the base of the rotating mechanism is connected to the vibration test bench, and the rotational connection with the turntable is achieved through the first cylindrical boss, providing a basis for adjusting the angle during testing. The fixing mechanism includes a conformal antenna mounting component and an RF front-end mounting component, which are positioned opposite each other on the other end face of the turntable. They can be matched and connected to the conformal antenna and the RF front-end respectively, allowing these two components to be vibrated on the same fixture. This solution comprehensively solves the problem that the vibration test fixtures for the conformal antenna and its RF front-end cannot be shared and cannot be rotated.

[0011] As a further embodiment of the vibration testing fixture, the upper end face of the first cylindrical boss is a circular flange, and a second cylindrical boss matching the circular flange is provided on the turntable.

[0012] The circular flange is provided with a plurality of equally spaced fixing hole groups, the fixing hole groups including a plurality of fixing holes arrayed along the axis of the circular flange, and a third slot hole matching the fixing hole groups is provided on the second cylindrical boss.

[0013] In this solution, a stable and precise rotating connection foundation is constructed by setting the upper surface of the first cylindrical boss as a circular flange and configuring a matching second cylindrical boss on the turntable. The multiple equally spaced fixing holes on the circular flange match the third slot on the second cylindrical boss. When the turntable rotates to different angles, it can be fixed by bolts passing through the fixing holes and the third slot. This not only ensures that the turntable can be stably locked at any rotation angle, meeting the testing requirements of different conformal antenna mounting angles, but also ensures the reliability of the connection between the turntable and the base during vibration testing, avoiding the impact of unstable connection on the accuracy of test results.

[0014] As a further embodiment of the vibration testing fixture, the third slot is a waist-shaped stepped slot.

[0015] In this design, the third slot is a waist-shaped stepped slot, which can better withstand various stresses generated by the test piece, prevent loosening or displacement between the turntable and the base, and ensure the accuracy and stability of the test. At the same time, this specially shaped slot also facilitates installation and disassembly, improving the ease of use of the fixture.

[0016] As a further embodiment of the vibration testing fixture, the outer flange surface of the first cylindrical boss is engraved with a first scale at 20° intervals, and the outer flange surface of the second cylindrical boss is engraved with a second scale at 1° intervals. When the turntable rotates, the rotation stops when the 0° position of the first scale is used as the rotation reference and the specified scale on the second scale is aligned with the 0° position of the base.

[0017] In this solution, the first scale is set at 20° intervals, which helps users quickly and roughly locate the rotation angle of the turntable. The second scale is set at 1° intervals, which allows for fine-tuning. Taking the 0° position of the first scale as the rotation reference, the rotation stops when the specified scale on the second scale aligns with the 0° position of the base during the turntable rotation. This allows the operator to accurately control the rotation angle of the turntable, thereby meeting the diverse testing needs of different conformal antennas due to different mounting angles.

[0018] As a further embodiment of the vibration testing fixture, a reinforcing rib is provided between the first cylindrical boss and the base.

[0019] In this design, the addition of reinforcing ribs greatly enhances the structural strength of the connection between the first cylindrical boss and the base, effectively dispersing and bearing these stresses, and reducing the risk of deformation and damage at the connection.

[0020] As a further embodiment of the vibration testing fixture, both the first cylindrical boss and the second cylindrical boss are hollow inside.

[0021] In this design, the hollow internal structure effectively reduces the weight of the entire fixture, making it more convenient to install and operate, reducing the load-bearing capacity requirements of the vibration test bench, reducing energy consumption, and improving testing efficiency.

[0022] As a further embodiment of the vibration test fixture, the fixing mechanism further includes a left fixing member and a right fixing member, with the two ends of the conformal antenna mounting member respectively connected to the left fixing member and the right fixing member.

[0023] In this design, due to the unique shape and installation requirements of the conformal antenna, a single connection method is insufficient to ensure its stability during testing. Therefore, the left and right fixing components are connected from both ends of the conformal antenna mounting component, forming a stable clamping structure. This effectively restricts the movement of the conformal antenna mounting component in both directions within the plane, greatly enhancing the fixation effect of the conformal antenna on the clamp.

[0024] As a further embodiment of the vibration testing fixture, the turntable is provided with a pair of first slots and second slots, which are arranged parallel to each other along the same horizontal plane.

[0025] Wherein, both ends of the radio frequency front-end mounting component are connected to the first slot through fasteners and can move along the length direction of the first slot;

[0026] The two ends of the conformal antenna mounting component are respectively connected to the second slot through fasteners and can move along the length direction of the second slot.

[0027] In this solution, the RF front-end mounting component and the conformal antenna mounting component can be connected to the corresponding slots via fasteners and can move along the length of the slots. This allows the mounting components to be adjusted in position according to their actual size, ensuring a better fit on the turntable and effectively improving the versatility of the fixture, so that it is no longer limited to test pieces of a specific size.

[0028] As a further embodiment of the vibration test fixture, the turntable is also provided with a fourth slot, which is spaced between the first slots, and the non-mounting end of the RF front-end mounting component is provided with a fifth fixing hole that matches the fourth slot.

[0029] In this design, the fourth slot array is spaced between the first slots, and together with the fifth fixing hole on the RF front-end mounting component, it adds an extra fixing point to the RF front-end mounting component. This not only enhances the stability of the RF front-end during the testing process, reduces displacement and shaking caused by vibration, and ensures the accuracy of the test results, but also better adapts to the installation requirements of RF front-ends of different specifications, improving the versatility of the fixture.

[0030] As a further embodiment of the vibration test fixture, a first support rib is provided between the outer ends of the left and right fixing members and the second slot, and a second support rib is provided between the non-installation end of the RF front-end mounting member and the first slot.

[0031] In this design, the support ribs greatly enhance the stability of the overall fixture structure. During vibration testing, the conformal antenna and RF front-end will experience significant forces due to vibration. The first support rib can effectively distribute the pressure at the connection between the left and right fixing parts and the conformal antenna mounting parts, preventing the connection parts from deforming or being damaged due to excessive force, and ensuring the conformal antenna is securely installed. The second support rib provides additional support for the RF front-end mounting parts, preventing them from shaking or shifting due to vibration during testing, and ensuring the positional accuracy of the RF front-end during testing.

[0032] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0033] 1. This utility model achieves the sharing of the same vibration test fixture between the conformal antenna mounting component and the RF front-end mounting component by setting the conformal antenna mounting component and the RF front-end component together on the same turntable plane, thereby reducing the design process and resource input and effectively reducing the design cost;

[0034] 2. This utility model, by setting a rotating mechanism, allows the turntable and the base to rotate at any angle and be precisely fixed, which can simulate the mounting angle of different conformal antennas and is suitable for testing various types of conformal antennas. It solves the problem that existing fixtures cannot rotate and are difficult to apply to testing conformal antennas with different mounting angles.

[0035] 3. The turntable of this utility model is provided with various slots, such as the first slot, the second slot, the fourth slot, etc., so that the RF front-end mounting component and the conformal antenna mounting component can move along the length direction of the slot, and the installation distance can be adjusted according to the size of different test components. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 is a frontal three-dimensional structural diagram of this utility model;

[0038] Figure 2 is a schematic diagram of the three-dimensional structure of the back of this utility model;

[0039] Figure 3 is a schematic diagram of the base structure of this utility model;

[0040] Figure 4 is a partial schematic diagram marked A in Figure 3;

[0041] Figure 5 is a front view schematic diagram of the turntable structure of this utility model;

[0042] Figure 6 is a schematic cross-sectional view of the structure marked AA in Figure 5;

[0043] Figure 7 is a top view of the turntable structure of this utility model;

[0044] Figure 8 is a schematic diagram of the conformal antenna mounting component of this utility model;

[0045] Figure 9 is a schematic diagram of the radio frequency front-end mounting component of this utility model.

[0046] The attached diagram shows the markings and corresponding component names:

[0047] 1-Base, 1.1-First cylindrical boss, 2-Turntable, 2.1-Second cylindrical boss, 3-First support rib, 4-Left side fixing component, 5-Conformal antenna mounting component, 6-RF front-end mounting component, 7-Conformal antenna, 8-Right side fixing component, 9-Second support rib, 10-Reinforcing rib, 11-Counterhead screw hole, 12-Fixing hole group, 13-First scale, 14-First slot, 15-Second slot, 16-Third slot, 17-Fourth slot, 18-First fixing hole, 19-Second fixing hole, 20-Third fixing hole, 21-Fourth fixing hole, 22-Fifth fixing hole, 23-Sixth fixing hole. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0049] Example 1

[0050] This embodiment 1 provides a vibration test fixture for a conformal antenna and its radio frequency front end, as shown in Figures 1-2, including a rotation mechanism and a fixing mechanism;

[0051] As shown in Figures 1-4, the rotating mechanism includes a base 1 and a turntable 2. The base 1 has countersunk screw holes 11 for fixing to the vibration test platform. The hole spacing of the countersunk screw holes 11 is consistent with that of the vibration test platform. A first cylindrical boss 1.1 is connected to one end of the base 1 away from the vibration test platform. To reduce weight, the first cylindrical boss 1.1 is hollow inside. Considering structural strength, a reinforcing rib 10 is connected between the outer side of the first cylindrical boss 1.1 and the base 1 to enhance structural strength. A circular flange is connected to the upper end face of the first cylindrical boss 1.1. The outer flange face of the circular flange is engraved with the first scale 13 at 20° intervals. Two sets of fixing holes 12 with the same interval are provided on the circular flange. Each set of fixing holes 12 contains multiple fixing holes arrayed along the axis of the circular flange for connection with the turntable 2.

[0052] Please refer to Figures 5-7. One end of the turntable 2 is connected to a second cylindrical boss 2.1 that matches a circular flange. To reduce weight, the second cylindrical boss 2.1 is also hollow inside. The outer flange surface of the second cylindrical boss 2.1 is engraved with a second scale at 1° intervals for precise control of the rotation angle. At the same time, the second cylindrical boss 2.1 is also provided with a third slot 16 that matches the fixing hole group 12. As shown in Figure 6, the third slot 16 is a waist-shaped stepped slot with a stepped cross-section. The third slot 16 is used to fix the second cylindrical boss 2.1 to the first cylindrical boss 1.1 and to cooperate with the fixing hole group 12. Using screws for fixing, the turntable 2 can be positioned at different angles. Specifically, when the turntable 2 needs to rotate, the 0° position of the first scale 13 is used as the rotation reference. When the specified scale on the second scale is aligned with the 0° position of the base, the rotation stops, and the third slot 16 and the fixing hole group 12 are locked with screws. Since the third slot 16 is an oblong stepped slot, the turntable 2 can rotate a maximum of 90° relative to the base 1 and be fixed. When the rotation angle is greater than 90°, the base 1 can be rotated as a whole by 90°, 180°, or 270° before rotating the turntable 2, thereby meeting the diverse testing needs of different conformal antennas due to different mounting angles.

[0053] As shown in Figures 1-2 and 8-9, the fixing mechanism includes a conformal antenna mounting component 5 and an RF front-end mounting component 6. The conformal antenna mounting component 5 and the RF front-end mounting component 6 are arranged opposite to each other and connected to the other end face of the turntable 2. The conformal antenna mounting component 5 is provided with a mounting surface that matches the conformal antenna. The mounting surface has a second fixing hole 19. The conformal antenna is connected and fastened to the screw through the second fixing hole 19. The RF front-end mounting component 6 is provided with a mounting surface that matches the RF front-end. The mounting surface is connected to an outward boss. A sixth fixing hole 23 is provided on the boss. The RF front-end is connected and fastened to the screw through the sixth fixing hole 23.

[0054] Due to the special shape and installation requirements of conformal antennas, it is difficult to ensure stability during testing by relying on a single connection method. Therefore, the above-mentioned fixing mechanism also includes a left fixing member 4 and a right fixing member 8. The two ends of the conformal antenna mounting member 5 are respectively provided with third fixing holes 20 for connecting the left fixing member 4 and the right fixing member 8, forming a stable clamping structure that can effectively restrict the movement of the conformal antenna mounting member 5 in two directions in the plane.

[0055] Example 2

[0056] To enable the mounting components to be positioned according to their actual dimensions, thus freeing them from being limited to test components of a specific size, this embodiment provides a vibration test fixture shared by a conformal antenna and its RF front-end, based on Embodiment 1. The difference is that, as shown in Figure 5, the turntable 2 has a pair of first slots 14 and second slots 15, which are arranged parallel to each other on the same horizontal plane. The two ends of the RF front-end mounting component 6 are respectively connected to the first slot 14 by fasteners and can move along the length direction of the first slot 14, with the range of movement depending on the length of the first slot 14; similarly, the two ends of the conformal antenna mounting component 5 are respectively connected to the second slot 15 by fasteners and can move along the length direction of the second slot 15, with the range of movement also depending on the length of the second slot 15.

[0057] Please refer to Figure 5. The turntable 2 is also provided with a fourth slot 17. The fourth slot 17 is arranged in a grid between the first slot 14 and the second slot 15. The non-installation end of the RF front-end mounting component 6 is provided with a fifth fixing hole 22 that matches the fourth slot. The non-installation end of the conformal antenna mounting component 5 is provided with a first fixing hole 18 that matches the fourth slot.

[0058] During vibration testing, the conformal antenna and RF front end will generate a large force due to vibration. In order to enhance the stability of the overall structure of the fixture, in this embodiment, the outer ends of the left fixing member 4 and the right fixing member 8 are connected to the second slot 15 with a first support rib 3. The non-installation end of the RF front end mounting member is provided with a fourth fixing hole 21. The fourth fixing hole 21 is connected to the first slot 14 with a second support rib 9. The support rib can effectively share the pressure at the connection and prevent the connection from deforming or being damaged due to excessive force.

[0059] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A vibration testing fixture shared by a conformal antenna and its radio frequency front-end, characterized in that, include: The rotating mechanism includes a base (1) and a turntable (2). One end of the base (1) is connected to the vibration test bench, and the other end of the base (1) is rotatably connected to the turntable (2) through a first cylindrical boss (1.1). The fixing mechanism includes a conformal antenna mounting component (5) for matching and connecting a conformal antenna and a radio frequency front-end mounting component (6) for matching and connecting a radio frequency front-end. The conformal antenna mounting component (5) and the radio frequency front-end mounting component (6) are arranged opposite to each other and connected to the other end face of the turntable (2).

2. The vibration test fixture for a conformal antenna and its RF front-end as described in claim 1, characterized in that, The upper end face of the first cylindrical boss (1.1) is a circular flange, and the turntable (2) is provided with a second cylindrical boss (2.1) that matches the circular flange; wherein, the circular flange is provided with a plurality of fixing hole groups (12) with the same spacing, the fixing hole group (12) includes a plurality of fixing holes arrayed along the axis of the circular flange, and the second cylindrical boss (2.1) is provided with a third slot (16) that matches the fixing hole group (12).

3. The vibration test fixture for a conformal antenna and its RF front-end as described in claim 2, characterized in that, The third slot (16) is a waist-shaped stepped slot.

4. The vibration test fixture for a conformal antenna and its RF front-end as described in claim 2, characterized in that, The outer flange surface of the first cylindrical boss (1.1) is engraved with a first scale (13) at 20° intervals, and the outer flange surface of the second cylindrical boss (2.1) is engraved with a second scale at 1° intervals. When the turntable (2) rotates, the rotation stops when the 0° position of the first scale (13) is used as the rotation reference and the specified scale on the second scale is aligned with the 0° position of the base.

5. A vibration test fixture for a conformal antenna and its RF front-end as described in claim 2, characterized in that, A reinforcing rib (10) is connected between the first cylindrical boss (1.1) and the base (1).

6. The vibration test fixture for a conformal antenna and its RF front-end as described in claim 2, characterized in that, Both the first cylindrical boss (1.1) and the second cylindrical boss (2.1) are hollow inside.

7. A vibration test fixture for a conformal antenna and its RF front-end shared by any one of claims 1-6, characterized in that, The fixing mechanism also includes a left fixing member (4) and a right fixing member (8), and the two ends of the conformal antenna mounting member (5) are respectively connected to the left fixing member (4) and the right fixing member (8).

8. A vibration test fixture for a conformal antenna and its RF front-end as described in claim 7, characterized in that, The turntable (2) is provided with a pair of first slots (14) and second slots (15), which are arranged parallel to each other along the same horizontal plane; wherein, the two ends of the radio frequency front-end mounting component (6) are respectively connected to the first slot (14) by fasteners and can move along the length direction of the first slot (14); wherein, the two ends of the conformal antenna mounting component (5) are respectively connected to the second slot (15) by fasteners and can move along the length direction of the second slot (15).

9. A vibration test fixture for a conformal antenna and its RF front-end as described in claim 8, characterized in that, The turntable (2) is also provided with a fourth slot (17), which is arranged in a spaced array between the first slots (14). The non-installation end of the radio frequency front-end mounting component (6) is provided with a fifth fixing hole (22) that matches the fourth slot (17).

10. A vibration testing fixture for a conformal antenna and its RF front-end as described in claim 8, characterized in that, A first support rib (3) is provided between the outer ends of the left fixing member (4) and the right fixing member (8) and the second slot (15), and a second support rib (9) is provided between the non-installation end of the radio frequency front-end mounting member (6) and the first slot (14).

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