An antenna spherical screen support system

Abstract

This invention provides an antenna spherical screen support system, belonging to the field of antenna technology. It includes a support structure, a connecting block, multiple push-pull mechanisms, an axial drive end, and a circumferential drive end. The support structure has a working cavity and a rotating ring. The connecting block is mounted on the rotating ring and has a sliding part and a fixing part. The center of the back surface of the spherical screen is fixedly connected to the fixing part. The push-pull mechanism is arranged around the spherical screen, with one end connected to the rotating ring and the other end connected to the back surface of the spherical screen. The axial drive end is mounted on the support structure and connected to the sliding part, used to drive the sliding part and the spherical screen to move linearly. The circumferential drive end is mounted on the support structure and connected to the rotating ring, used to drive the rotating ring and the spherical screen to rotate. The antenna spherical screen support system provided by this invention enables full-dimensional, real-time control of the spherical screen's position (axial and circumferential) and angle (elevation angle, polarization angle), improving experimental efficiency and data reliability.

Description

Technical Field

[0001] This invention belongs to the field of antenna technology, and more specifically, relates to an antenna spherical screen support system. Background Technology

[0002] In modern radio physics, deep space exploration, and electronic warfare, radio simulation systems serve as core experimental platforms, undertaking the crucial mission of simulating complex electromagnetic environments, verifying antenna performance, and optimizing signal processing algorithms. Among these components, the antenna spherical screen, as the core supporting component, is primarily used to simulate the electromagnetic characteristics of space radiation sources such as celestial targets and artificial satellites. The stability of its supporting structure and the adjustability of its position and angle directly determine the accuracy, repeatability, and scene coverage of the simulation experiments, having a decisive impact on the reliability of subsequent scientific data and the effectiveness of engineering applications.

[0003] Currently, the antenna spherical screen support structure in radio simulation systems mostly adopts a fixed design. This design concept originated from the early needs of radio simulation scenarios for simulating single targets, and it was applicable to certain scenarios with low structural complexity and fixed experimental parameters. However, with the expansion of radio simulation applications, experimenters not only need to simulate the electromagnetic characteristics of a single fixed target, but also need to construct complex scenarios such as multi-target cooperation and target trajectory motion. Therefore, real-time adjustment of the spatial position and angular attitude of the antenna spherical screen is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide an antenna spherical screen support system to solve the technical problem in the prior art that the spatial position and angular attitude of the antenna spherical screen cannot be adjusted in real time.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an antenna spherical screen support system, comprising:

[0006] A support structure is provided for installation on the ground; one side of the support structure is provided with a working cavity and a rotating ring installed in the working cavity, the rotating ring being rotatably connected to the support structure; a spherical screen is installed in the working cavity and located inside the rotating ring; there is an installation gap between the spherical screen and the inner wall of the rotating ring;

[0007] A connecting block is mounted on the rotating ring and has a sliding part that moves along the axial direction of the rotating ring and a fixed part that is ball-jointed with the sliding part; the center of the back of the spherical screen is fixedly connected to the fixed part.

[0008] Multiple push-pull mechanisms are installed within the installation spacing and arranged around the spherical screen; one end of each push-pull mechanism is connected to the rotating ring, and the other end is connected to the back of the spherical screen.

[0009] An axial drive end is mounted on the support structure and connected to the sliding part, used to drive the sliding part and the spherical screen to move linearly;

[0010] The circumferential drive end is mounted on the support structure and connected to the rotating ring, and is used to drive the rotating ring and the spherical screen to rotate.

[0011] In one possible implementation, the connecting block has a through hole that is collinear with the axis of the rotating ring; the sliding part is slidably connected to the through hole, and one end of the sliding part has a ball hole; one end of the fixing part has a spherical body that mates with the ball hole, and the other end has a flange for connecting to the spherical screen.

[0012] In one possible implementation, the connecting block is located at the center of the rotating ring, and a plurality of radially arranged connecting plates are provided on the outer side of the connecting block, with the end of the connecting plate away from the connecting block being fixedly connected to the inner wall of the rotating ring; the width of the connecting plate gradually increases from the center outward.

[0013] In one possible implementation, the connecting block and the sliding part are provided with a radially extending sliding opening and a locking plate slidably connected within the sliding opening, the locking plate moving radially along the sliding opening to lock the spherical body.

[0014] In one possible implementation, the end of the sliding part away from the fixed part is provided with a rotating groove and a limiting plate located in the rotating groove, and the free end of the axial driving end is rotatably connected to the rotating groove and abuts against the limiting plate.

[0015] In one possible implementation, the push-pull mechanism includes at least two spaced linear actuators, one end of which is hinged to the inside of the rotating ring; the back of the spherical screen is provided with a plurality of mounting seats corresponding one-to-one with the push-pull mechanism, and the other end of the linear actuator is hinged to the mounting seat.

[0016] In one possible implementation, each of the push-pull mechanisms includes two linear actuators; the mounting base is provided with an elongated groove and a rotating rod rotatably connected within the elongated groove; the rotating rod is provided with two threaded sections with opposite directions of rotation and two sliding blocks respectively threaded onto the two threaded sections; the outer surface of the sliding blocks is slidably engaged with the inner wall of the elongated groove; the other ends of the two linear actuators are respectively hinged to the corresponding sliding blocks.

[0017] In one possible implementation, the support structure has an opening communicating with the working cavity, and the outer side of the rotating ring has a first transmission part corresponding to the opening; the circumferential driving end has a second transmission part located in the opening, and the first transmission part is connected to the second transmission part for driving the rotating ring to rotate.

[0018] In one possible implementation, the support structure includes a truss and four load-bearing plates arranged around the truss. The inner walls of the load-bearing plates are provided with arc-shaped surfaces, and one end of each of the four load-bearing plates extends outward to form the working cavity. The axial drive end is mounted on the truss, and the circumferential drive end is mounted on the load-bearing plate. The spherical screen has a wave-absorbing material on the side near the working cavity.

[0019] In one possible implementation, the antenna spherical screen support system further includes a buffer groove formed on the ground, and the lower end of the supporting plate located below is provided with a support leg located in the buffer groove, and the buffer groove is filled with vibration isolation material.

[0020] The beneficial effects of the antenna spherical screen support system provided by this invention are as follows: Compared with the prior art, the antenna spherical screen support system of this invention, during use, firstly, determines the initial position and angle parameters required for the spherical screen according to the target scenario simulated in the experiment (simulation of a single target fixed attitude, simulation of multiple targets cooperative motion, etc.); if it is necessary to adjust the circumferential position of the spherical screen (simulating the azimuth angle change of the target around the observation point), the circumferential drive end is activated, driving the rotating ring to rotate the spherical screen around the central axis of the support structure until the preset azimuth angle is reached. During the process, the deviation can be monitored and corrected in real time by the system's built-in position sensor; when it is necessary to adjust the axial position of the spherical screen (simulating the distance change between the target and the observation point), the axial drive end is activated, pushing or pulling the sliding part along the rotating ring axis. The system moves the spherical screen in a straight line until it meets the preset axial position requirements. If the angle and attitude of the spherical screen need to be adjusted (simulating the pitch angle shift and polarization direction change of the target), multiple push-pull mechanisms are controlled to extend and retract differently according to the required angle parameters (adjusting the upper push-pull mechanism to extend and the lower push-pull mechanism to shorten to increase the pitch angle). Utilizing the ball joint characteristics of the connecting block's fixed part and sliding part, the spherical screen rotates around the ball joint until the angle sensor feedback reaches the preset value. In dynamic simulation scenarios (satellite trajectory motion simulation), the system can control the preset position and angle change trajectory, and synchronously or stepwise start the circumferential drive end, axial drive end, and push-pull mechanism to achieve real-time and continuous adjustment of the spherical screen's position and angle without interrupting the experimental process. In this way, by combining the axial drive end, the circumferential drive end and the push-pull mechanism, the position (axial and circumferential) and angle (pitch angle, polarization angle, etc.) of the spherical screen can be controlled in real time and in all dimensions. This not only meets the simulation of a single fixed target, but also accurately constructs complex dynamic scenarios such as multi-target collaboration and target trajectory motion, which greatly expands the scene coverage capability of the radio simulation system and thus significantly improves experimental efficiency and data reliability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the internal structure of the antenna spherical screen support system provided in an embodiment of the present invention;

[0023] Figure 2 A connection diagram of the support structure, axial drive end, and connecting block provided in an embodiment of the present invention;

[0024] Figure 3Schematic diagram of the internal structure of the connecting block provided in the embodiment of the present invention Figure 1 ;

[0025] Figure 4 This is a partial schematic diagram of the connecting block provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the partial structure of the mounting base provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram showing the connection between the circumferential drive end and the rotating ring provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection between the support plate and the buffer groove provided in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the antenna spherical screen support system provided in an embodiment of the present invention.

[0030] The following are the labeling elements in the figure:

[0031] 10. Support structure; 11. Working chamber; 12. Rotary ring; 13. Installation spacing; 14. Connecting plate; 15. Opening; 16. First transmission part; 17. Truss; 18. Bearing plate; 19. Support leg; 20. Connecting block; 21. Sliding part; 22. Fixing part; 23. Through hole; 24. Ball hole; 25. Spherical body; 26. Flange; 27. Sliding port; 28. Clamping plate; 30. Push-pull mechanism; 31. Linear actuator; 32. Mounting base; 33. Long slot; 34. Rotating rod; 35. Threaded section; 36. Sliding block; 40. Axial drive end; 50. Circumferential drive end; 51. Second transmission part; 52. Housing; 53. Bearing; 60. Rotating groove; 61. Limiting plate; 70. Buffer groove; 71. Vibration isolation material; 72. Flange; 80. Antenna; 81. Spherical screen. Detailed Implementation

[0032] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] Please see Figures 1 to 8 The antenna spherical screen support system provided by the present invention will now be described. An antenna spherical screen support system includes a support frame 10, a connecting block 20, a push-pull mechanism 30, an axial drive end 40, and a circumferential drive end 50. The support frame 10 is used for installation on the ground. A working cavity 11 and a rotating ring 12 installed in the working cavity 11 are provided on one side of the support frame 10, and the rotating ring 12 is rotatably connected to the support frame 10. A spherical screen 81 is installed in the working cavity 11 and located within the rotating ring 12. An installation gap 13 exists between the spherical screen 81 and the inner wall of the rotating ring 12. The connecting block 20 is installed on the rotating ring 12 and has a sliding part 21 that moves axially along the rotating ring 12 and a fixing part that spherically engages with the sliding part 21. 22; The center of the back of the spherical screen 81 is fixedly connected to the fixing part 22; There are multiple push-pull mechanisms 30, all installed within the installation spacing 13 and arranged around the spherical screen 81; One end of the push-pull mechanism 30 is connected to the rotating ring 12, and the other end is connected to the back of the spherical screen 81; The push-pull mechanism 30 is used to adjust the angle of the spherical screen 81; The axial drive end 40 is installed on the support structure 10 and connected to the sliding part 21, and is used to drive the sliding part 21 and the spherical screen 81 to move linearly; The circumferential drive end 50 is installed on the support structure 10 and connected to the rotating ring 12, and is used to drive the rotating ring 12 and the spherical screen 81 to rotate.

[0037] Compared with the prior art, the antenna spherical screen support system provided by this invention has the following features: The support structure 10, as a basic load-bearing component, is installed on the ground. A working cavity 11 on one side provides installation space for the rotating ring 12 and the spherical screen 81. The rotating ring 12 is rotatably connected to the support structure 10, providing a basis for the circumferential rotation of the spherical screen 81 and creating conditions for the installation and operation of the push-pull mechanism 30 through the pre-reserved installation gap 13 between it and the spherical screen 81. The connecting block 20 moves along the axial direction of the rotating ring 12 through the cooperation of the sliding part 21 and the rotating ring 12, while simultaneously being connected to the back of the spherical screen 81 by the fixing part 22. The fixed connection at the center of the surface and the ball joint design of the sliding part 21 and the fixed part 22 ensure a stable connection of the spherical screen 81 while providing a flexible rotational basis for its angle adjustment. Multiple push-pull mechanisms 30 arranged around the spherical screen 81 within the installation spacing 13, one end connected to the rotating ring 12 and the other end connected to the back of the spherical screen 81, can precisely change the pitch angle, polarization angle and other angular attitude of the spherical screen 81 through synchronous or differentiated extension and retraction. The axial drive end 40 is installed on the support structure 10 and connected to the sliding part 21, which can drive the sliding part 21 to move the spherical screen 81 linearly along the axis of the rotating ring 12 to achieve position adjustment in the X-axis or Y-axis direction. The circumferential drive end 50 is also installed on the support structure 10 and connected to the rotating ring 12, which can drive the rotating ring 12 to rotate the spherical screen 81 circumferentially around the central axis of the support structure 10 to complete the position change in the azimuth direction.

[0038] During use, firstly, based on the target scenario of the experiment (simulation of a single target in a fixed posture, simulation of multiple targets co-movement, etc.), the initial position and angle parameters required for the spherical screen 81 are determined. If it is necessary to adjust the circumferential position of the spherical screen 81 (simulating the change of the azimuth angle of the target around the observation point), the circumferential drive end 50 is activated, driving the rotating ring 12 to rotate the spherical screen 81 around the central axis of the support structure 10 until the preset azimuth angle is reached. During this process, the deviation can be monitored and corrected in real time by the system's built-in position sensor. When it is necessary to adjust the axial position of the spherical screen 81 (simulating the change of distance between the target and the observation point), the axial drive end 40 is activated, pushing or pulling the sliding part 21 to move along the axial direction of the rotating ring 12, thereby driving the spherical screen 81 to make linear motion until the preset azimuth angle is met. The axial position requirement; if it is necessary to adjust the angle attitude of the spherical screen 81 (simulating the pitch angle shift and polarization direction change of the target), according to the required angle parameters, control multiple push-pull mechanisms 30 to perform differentiated extension and retraction (adjust the upper push-pull mechanism 30 to extend and the lower push-pull mechanism 30 to shorten to increase the pitch angle), and use the ball joint characteristics of the fixed part 22 and the sliding part 21 of the connecting block 20 to make the spherical screen 81 rotate around the ball joint until the angle sensor feedback reaches the preset value; in the dynamic simulation scenario (satellite trajectory motion simulation), the circumferential drive end 50, the axial drive end 40 and the push-pull mechanism 30 can be started synchronously or stepwise by controlling the system preset position and angle change trajectory, so as to realize the real-time and continuous adjustment of the position and angle of the spherical screen 81 without interrupting the experimental process. In this way, by combining the axial drive end 40, the circumferential drive end 50 and the push-pull mechanism 30, the position (axial and circumferential) and angle (pitch angle, polarization angle, etc.) of the spherical screen 81 can be controlled in real time and in all dimensions. This not only meets the simulation of a single fixed target, but also accurately constructs complex dynamic scenarios such as multi-target collaboration and target trajectory motion, which greatly expands the scene coverage capability of the radio simulation system and thus significantly improves experimental efficiency and data reliability.

[0039] The control system is connected to the push-pull mechanism 30, the circumferential drive end 50, and the axial drive end 40, enabling accurate and rapid operation. A feedback adjustment system is formed by arranging position sensors, displacement sensors, and a camera detection antenna 80.

[0040] Please see Figures 1 to 4As a specific embodiment of the antenna spherical screen support system provided by the present invention, the connecting block 20 is provided with a through hole 23 that is collinear with the axis of the rotating ring 12; the sliding part 21 is slidably connected in the through hole 23, and one end of the sliding part 21 is provided with a ball hole 24; one end of the fixing part 22 has a spherical body 25 that is fitted and installed with the ball hole 24, and the other end is provided with a flange 26 for connecting with the spherical screen 81; the through hole 23 is collinear with the axis of the rotating ring 12, ensuring that the sliding part 21 drives the spherical screen 81 to move axially and always maintains a precise trajectory to avoid deviation; the sliding part 21 is slidably connected with the through hole 23 to provide stable guidance for axial position adjustment; the fit between the ball hole 24 and the spherical body 25 and the setting of the flange 26 constitute a multifunctional connection structure. This ball joint design grants the spherical screen 81 multiple degrees of freedom for rotation, perfectly complementing the push-pull mechanism 30 to achieve angle adjustment. The tight fit between the ball hole 24 and the spherical body 25 reduces wobbling and ensures support stability. The flange 26 connection facilitates the installation and disassembly of the spherical screen 81, reducing maintenance difficulty while ensuring connection strength and preventing the spherical screen 81 from falling off during adjustment or operation. This provides a reliable structural foundation for the axial movement and angle adjustment of the spherical screen 81, ensuring the accuracy and stability of the adjustment process, and further enhances the practicality and reliability of the overall support system.

[0041] Please see Figures 1 to 4 As a specific embodiment of the antenna spherical screen support system provided by the present invention, the connecting block 20 is located at the center of the rotating ring 12. Multiple radially arranged connecting plates 14 are provided on the outer surface of the connecting block 20, and the end of each connecting plate 14 away from the connecting block 20 is fixedly connected to the inner wall of the rotating ring 12. The width of the connecting plate 14 gradually increases from the center outwards. The connecting block 20 is precisely located at the center of the rotating ring 12, ensuring a symmetrical distribution of the supporting force on the spherical screen 81. Multiple radially and uniformly arranged connecting plates 14 are provided on the outer surface, and the width of each connecting plate 14 gradually increases from the center towards the inner wall of the rotating ring 12. Central positioning ensures balanced force on the spherical screen 81, avoiding deformation or displacement caused by support point offset. The radially arranged connecting plates 14 form a multi-point uniform force transmission structure, significantly improving the connection stiffness between the connecting block 20 and the rotating ring 12, reducing relative swaying during dynamic adjustment. The gradually changing width design conforms to the laws of mechanical transmission, effectively dispersing the stress generated when the rotating ring 12 rotates and moves axially, avoiding the risk of breakage due to stress concentration at the root of the connecting plate 14. This structure enhances the overall stability of the support structure, reduces the interference of system vibration on the spherical screen 81, and ensures the accuracy requirements of millimeter-wave and submillimeter-wave frequency band simulation.

[0042] Please see Figure 2 and Figure 4As a specific embodiment of the antenna spherical screen support system provided by the present invention, the connecting block 20 and the sliding part 21 are provided with a radially extending sliding port 27 and a locking plate 28 slidably connected in the sliding port 27. The locking plate 28 moves radially along the sliding port 27 to lock the spherical body 25. Both the connecting block 20 and the sliding part 21 are provided with a radially extending sliding port 27. The locking plate 28 is slidably assembled in the sliding port 27. By moving radially along the sliding port 27, the locking or loosening of the spherical body 25 can be achieved. This not only retains the multi-angle rotation characteristics of the spherical body 25 and the ball hole 24, which meets the needs of the push-pull mechanism 30 to adjust the angle of the spherical screen 81, but also allows for precise control of the tightness of the ball joint through the locking plate 28. After the angle is adjusted to the correct position, pushing the locking plate 28 to move radially locks the spherical body 25, which can eliminate the slight shaking of the spherical screen 81 caused by the ball joint gap. When the angle needs to be readjusted, the ball joint flexibility can be restored by moving the locking plate 28 in the opposite direction without disassembling the parts. This also ensures that the sphere 25 and the spherical screen 81 rotate stably together with the rotating ring 12. This method solves the problem of loosening in traditional ball joints, ensures positional stability after angle adjustment, reduces angular deviation in simulation experiments, and improves data accuracy. A drive mechanism is provided on the outer surface of the connecting block 20 to move the clamping plate 28 within the sliding opening 27. The drive mechanism can be a hydraulic cylinder, pneumatic cylinder, etc.

[0043] Please see Figures 1 to 3 As a specific embodiment of the antenna spherical screen support system provided by the present invention, the sliding part 21 is provided with a rotating groove 60 and a limiting plate 61 located in the rotating groove 60 at one end away from the fixed part 22. The free end of the axial driving end 40 is rotatably connected in the rotating groove 60 and abuts against the limiting plate 61. The rotating groove 60 is opened at one end of the sliding part 21 away from the fixed part 22, and the limiting plate 61 is built in to form a T-shaped groove. The free end of the axial driving end 40 is set as a T-shaped structure. The T-shaped structure is rotatably connected in the T-shaped groove and abuts against the limiting plate 61. The relative rotational freedom between the driving end and the sliding part 21 is retained through the rotating connection, and the driving force is accurately transmitted through the limiting plate 61 to avoid the jamming problem caused by motion interference in traditional rigid connections. At the same time, it ensures that the rotating ring 12, the connecting block 20 and the spherical screen 81 rotate stably and smoothly without being obstructed by the axial driving end 40.

[0044] Please see Figure 1 and Figure 8As a specific embodiment of the antenna spherical screen support system provided by the present invention, the push-pull mechanism 30 includes at least two spaced linear actuators 31, one end of which is hinged to the inside of the rotating ring 12; the back of the spherical screen 81 is provided with a plurality of mounting seats 32 corresponding to the push-pull mechanism 30, and the other end of the linear actuator 31 is hinged to the mounting seat 32; the spaced linear actuators 31 can form multi-directional force support, and through differentiated extension and contraction (one side extends and the other side shortens), the pitch angle, polarization angle and other multi-dimensional angle adjustment of the spherical screen 81 can be realized, avoiding the limitation of single actuator angle adjustment; the hinged design at both ends can eliminate stress concentration caused by hard connection, adapt to the small displacement and angle change when the spherical screen 81 is adjusted, and prevent the components from being damaged by rigid tension; the linear actuator 31 itself has high-precision displacement control capability, and with the corresponding mounting seats 32, it can ensure that the driving force is evenly transmitted to the spherical screen 81, avoiding screen deformation caused by uneven local force.

[0045] Please see Figure 1 and Figure 5 As a specific embodiment of the antenna spherical screen support system provided by the present invention, each push-pull mechanism 30 includes two linear actuators 31; the mounting base 32 is provided with an elongated groove 33 and a rotating rod 34 rotatably connected in the elongated groove 33, the rotating rod 34 is provided with two threaded sections 35 with opposite directions of rotation and two sliding blocks 36 respectively threadedly connected to the two threaded sections 35, the outer side of the sliding block 36 is slidably connected to the inner wall of the elongated groove 33; the other end of the two linear actuators 31 is respectively hinged to the corresponding sliding block 36. The configuration of dual linear actuators 31 not only strengthens the support for the spherical screen 81, avoiding the wobbling problem that easily occurs when supported by a single actuator, but also improves the flexibility of angle adjustment. The reverse threaded section 35 of the rotating rod 34 can drive the two sliding blocks 36 to move synchronously in opposite directions or in the same direction, which can precisely adjust the distance and force angle of the two linear actuators 31, ensuring that the driving force is evenly transmitted to the spherical screen 81 and preventing local force imbalance. The elongated groove 33 provides stable guidance for the sliding block 36, avoiding lateral displacement during adjustment. The hinged structure of the actuator and the sliding block 36 can adapt to the posture adjustment when the angle of the spherical screen 81 changes, eliminating stress concentration caused by hard connection and effectively protecting the linear actuators 31 and the spherical screen 81 components. This approach allows for more precise control over the angle changes of the spherical screen 81, enabling accurate simulation of subtle attitude adjustments of celestial targets, satellites, and other radiation sources, thus meeting the stringent requirements of high-precision radio simulation for angle control. Simultaneously, the balanced force design prevents deformation of the spherical screen 81 due to excessive local forces, ensuring the accuracy of electromagnetic characteristic simulation.

[0046] Please see Figure 1 and Figure 6As a specific embodiment of the antenna spherical screen support system provided by the present invention, the support structure 10 is provided with an opening 15 communicating with the working cavity 11, and the outer side of the rotating ring 12 is provided with a first transmission part 16 corresponding to the opening 15; the circumferential drive end 50 is provided with a second transmission part 51 located in the opening 15, and the first transmission part 16 is connected to the second transmission part 51 for driving the rotating ring 12 to rotate. The design of the opening 15 does not need to destroy the overall rigidity of the support structure 10, providing a channel for the installation and power transmission of the transmission components, and avoiding weakening the load-bearing capacity of the structure due to additional openings or structural modifications; the first transmission part 16 and the second transmission part 51 are connected at the corresponding positions of the opening 15, shortening the power transmission path and reducing intermediate losses, and the opening 15 can form a certain limit on the transmission part to prevent transmission misalignment during operation; at the same time, the opening 15 provides an intuitive operating space for the installation and maintenance of the transmission components, and maintenance can be completed without disassembling the support structure 10, reducing the complexity of operation. In this way, firstly, transmission accuracy is ensured. The precisely connected transmission unit ensures that the power of the circumferential drive end 50 is stably transmitted to the rotating ring 12, resulting in minimal displacement deviation when the spherical screen 81 rotates in the circumferential direction. This meets the requirements for precise adjustment of the target azimuth angle in radio simulation, and is especially suitable for dynamic scenarios such as multi-target cooperative motion. Secondly, support stability is enhanced. The overall rigidity of the support structure 10 is not affected, which can better resist internal vibrations and external environmental interference, reduce the shaking when the rotating ring 12 rotates, further ensure the positional stability of the spherical screen 81, and improve the accuracy of simulation data.

[0047] A housing 52 for sealing the circumferential drive end 50 and the second transmission part 51 is installed on the support plate 18; a bearing 53 is installed on the inner wall of the working cavity 11, and the rotating ring 12 is fitted on the bearing 53 for smoother rotation.

[0048] Please see Figure 1As a specific embodiment of the antenna spherical screen support system provided by the present invention, the support structure 10 includes a truss 17 and four support plates 18 arranged around the truss 17. The inner wall of the support plate 18 is provided with an arc-shaped surface, and one end of the four support plates 18 extends outward to form a working cavity 11. An axial drive end 40 is installed on the truss 17, and a circumferential drive end 50 is installed on the support plate 18. The spherical screen 81 is provided with a wave-absorbing material on the side near the working cavity 11. The support structure 10 takes the truss 17 as the core skeleton, and is equipped with four support plates 18 arranged around the truss 17. The inner wall of the support plate 18 is provided with an arc-shaped surface and one end extends outward to form a working cavity 11. The working cavity 11 and truss 17 structure combine lightweight design with high rigidity, reducing overall weight while ensuring support strength and preventing excessive structural weight from increasing the load on the drive end. The arc-shaped inner wall of the bearing plate 18 can adapt to the rotation trajectory of the rotating ring 12, reducing frictional losses during the rotation of the rotating ring 12. The enclosed layout of the four bearing plates 18 also enhances the structural stability of the working cavity 11. The drive ends are installed separately (axial drive end 40 is located on truss 17, and circumferential drive end 50 is located on bearing plate 18), which meets the respective drive force transmission requirements and improves the control precision. The absorbing material can absorb stray electromagnetic waves in the working cavity 11 and avoid electromagnetic interference. Through this structure, it provides stable support for the circumferential rotation of the spherical screen 81 driven by the rotating ring 12, preventing positional deviations caused by structural deformation and ensuring simulation accuracy. At the same time, the absorbing material weakens electromagnetic interference and improves the accuracy of radio signal simulation.

[0049] Please see Figure 1 and Figure 7 As a specific embodiment of the antenna spherical screen support system provided by the present invention, the antenna spherical screen support system also includes a buffer groove 70 opened on the ground. The lower end of the supporting plate 18 located below is provided with a support leg 19 located in the buffer groove 70, and the buffer groove 70 is filled with vibration isolation material 71. By opening the buffer groove 70 on the ground, the support leg 19 at the lower end of the supporting plate 18 is embedded in the groove, and the buffer groove 70 is filled with vibration isolation material 71 (such as high damping rubber, polyurethane damping block, etc.), a passive vibration isolation structure is constructed. The cooperation between the support leg 19 and the buffer groove 70 can limit the lateral displacement of the supporting plate 18 and prevent the support structure 10 from horizontal displacement due to ground disturbance; the vibration isolation material 71 can passively absorb the ground vibration energy and block the transmission path of vibration to the support structure 10, the rotating ring 12 and the spherical screen 81. Compared with the traditional non-vibration isolation design, it can weaken the impact of vibration on the system from the source, and no additional power drive is required, making the structure simple and reliable. This approach effectively reduces the slight displacement of the spherical screen 81 caused by vibration, and ensures the angle and position accuracy of high-precision simulation experiments in the millimeter-wave and submillimeter-wave frequency bands, avoiding simulation data deviations caused by vibration. An outwardly extending flange 72 is provided on the support leg 19 to increase the contact area between the vibration isolation material 71 and the support leg 19, enhancing the buffering effect.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antenna spherical screen support system, characterized by, The application relates to a support structure for installation on the ground, one side of the support structure being provided with a working cavity and a rotating ring installed in the working cavity, the rotating ring being rotationally connected with the support structure; a spherical screen is installed in the working cavity and located in the rotating ring; the spherical screen and the inner wall of the rotating ring have an installation spacing therebetween; a connecting block is installed on the rotating ring and has a sliding part moving along the axial direction of the rotating ring and a fixed part in spherical connection with the sliding part; the central part of the back surface of the spherical screen is fixedly connected with the fixed part; a plurality of push-pull mechanisms are installed in the installation spacing and arranged around the spherical screen, one end of the push-pull mechanism being connected with the rotating ring and the other end being connected with the back surface of the spherical screen; an axial driving end is installed on the support structure and connected with the sliding part, and is used for driving the linear movement of the sliding part and the spherical screen; a ring driving end is installed on the support structure and connected with the rotating ring, and is used for driving the rotation of the rotating ring and the spherical screen; the push-pull mechanism comprises two linear drivers arranged at intervals, one end of the linear driver being hingedly connected with the inner part of the rotating ring; the back surface of the spherical screen is provided with a plurality of mounting seats corresponding to the push-pull mechanisms one by one, the other end of the linear driver being hingedly connected with the mounting seat; the mounting seat is provided with a long slot and a rotating rod rotationally connected in the long slot, the rotating rod being provided with two thread sections with opposite rotation directions and two sliding blocks threadedly connected with the two thread sections respectively, the outer side surface of the sliding block being in sliding fit connection with the inner wall of the long slot; the other end of the two linear drivers is hingedly connected with the corresponding sliding blocks respectively. The connecting block is provided with a through hole in line with the axis of the rotating ring; the sliding part is slidingly connected in the through hole, and one end of the sliding part is provided with a ball hole; one end of the fixed part is provided with a spherical body matched with the ball hole, and the other end is provided with a flange plate connected with the spherical screen. The connecting block is located at the central position of the rotating ring, the outer side surface of the connecting block is provided with a plurality of connection plates arranged in a radial manner, and one end of the connection plate away from the connecting block is fixedly connected with the inner wall of the rotating ring; the width of the connection plate gradually increases from the center to the outside. The connecting block and the sliding part are provided with a sliding opening extending in the radial direction and a clamping plate slidingly connected in the sliding opening, the clamping plate moving along the radial direction of the sliding opening to clamp the spherical body. One end of the sliding part away from the fixed part is provided with a rotating slot and a limiting plate in the rotating slot, the free end of the axial driving end being rotationally connected in the rotating slot and abutting against the limiting plate. The support structure is provided with an opening in communication with the working cavity, the outer side of the rotating ring is provided with a first transmission part corresponding to the opening; the ring driving end is provided with a second transmission part located in the opening, and the first transmission part is connected with the second transmission part, and is used for driving the rotation of the rotating ring. ​ ​ 2. The antenna spherical screen support system of claim 1, wherein, ​ 3. The antenna spherical screen support system of claim 2, wherein, ​ 4. The antenna spherical screen support system of claim 2, wherein, ​ 5. The antenna spherical screen support system of claim 1, wherein, ​ 6. The antenna spherical screen support system of claim 1, wherein, ​ 7. The antenna spherical screen support system of claim 1, wherein, The support structure comprises a truss and four load-bearing plates arranged around the truss, inner walls of the load-bearing plates are provided with arc surfaces, one end of the four load-bearing plates extends outward to form the working cavity; the axial driving end is installed on the truss, and the annular driving end is installed on the load-bearing plate; the spherical screen is provided with a wave-absorbing material on the side close to the working cavity.

8. The antenna spherical screen support system of claim 7, wherein, The antenna spherical screen support system further comprises a buffer groove opened on the ground, the lower end of the load-bearing plate located below is provided with a supporting leg located in the buffer groove, and the buffer groove is filled with a vibration isolation material.

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