High-speed radar reflector suitable for low-altitude detection radar

Abstract

The invention provides a high-speed radar reflector suitable for a low-altitude detection radar, and belongs to the technical field of radar reflectors, the high-speed radar reflector comprises a horizontal metal plate, the top and the bottom of the horizontal metal plate are each symmetrically provided with four fixing tables, and a rotating groove is formed in the center of the top of each fixing table; a connecting hole is formed in the inner side wall of the rotating groove, a rotating rod is rotationally embedded in the connecting hole, a rotating block is arranged on the outer circumferential surface of the rotating rod, a vertical metal plate is integrally formed on the outer wall of one side of the rotating block, and a gear is arranged at one end of the rotating rod; the radar reflector has folding and unfolding capabilities by adjusting the angle between the horizontal metal plate and the vertical metal plate, so that the radar reflector is in a plate-shaped structure in a folding state, the size and the occupied space are greatly reduced, and the radar reflector of the plate-shaped structure is convenient to store, transport and install.

Description

Technical Field

[0001] This invention belongs to the field of radar reflector technology, and specifically relates to a high-speed radar reflector suitable for low-altitude detection radar. Background Technology

[0002] A high-speed radar reflector is a radar signal enhancement device specifically designed for high-speed moving targets (such as missiles and fighter jets). It uses a special structure to efficiently reflect radar waves back to the source, thereby significantly improving the display intensity of the target on the radar screen. It is usually composed of three mutually perpendicular metal surfaces, which can concentrate the reflection of radar waves from different directions to form a strong echo signal. When radar waves encounter the reflector, they will undergo multiple refractions, reflections, or diffractions, ultimately forming a stronger echo signal. For example, common corner reflectors are composed of three mutually perpendicular metal surfaces, which can concentrate the reflection of radar waves from different directions, making the target display clearer on the radar screen.

[0003] Some existing high-speed radar reflectors use metal plates as the radar wave reflecting surface. Since multiple metal plates need to be perpendicular to each other, the high-speed radar reflector is large in size, occupies a lot of space, and is inconvenient to transport. The conical radar reflector is also inconvenient to install. The edges of its metal plates can easily scratch the installers. Moreover, the joints between adjacent metal plates lack limiting supports, making them prone to deformation under external impact, which reduces the radar reflection area.

[0004] Therefore, a high-speed radar reflector suitable for low-altitude detection radar is proposed. Summary of the Invention

[0005] This invention provides a high-speed radar reflector suitable for low-altitude detection radar, with the aim of solving the problems mentioned above.

[0006] This invention provides a high-speed radar reflector suitable for low-altitude detection radar, comprising a horizontal metal plate. Four fixed platforms are symmetrically arranged at the top and bottom of the horizontal metal plate. A rotating groove is formed at the center of the top of each fixed platform. A connecting hole is formed on the inner wall of the rotating groove. A rotating rod is embedded inside the connecting hole. A rotating block is provided on the outer circumference of the rotating rod. A vertical metal plate is integrally formed on one outer wall of the rotating block. A gear is provided at one end of the rotating rod. A metal plate folding assembly is provided on the horizontal metal plate. The metal plate folding assembly includes a frustum fixed to the center of the top of the horizontal metal plate. An inner cavity is formed at the center of the inner cavity. The rotating rod passes through the frustum, with one end located inside the inner cavity. A disc is located at the lower part of the interior of the truncated cone. A toothed plate is located on the top of the disc. A limit ring is located at the bottom of the interior cavity. A lower threaded groove is located at the center of the top of the truncated cone. The interior cavity and the lower threaded groove are connected. An upper threaded groove is located at the center of the bottom of the truncated cone. A metal plate support assembly is located on the truncated cone. The metal plate support assembly includes a threaded head that is screwed into the lower threaded groove. A support column is located at the end of the threaded head away from the truncated cone. A threaded hole is located at the center of the bottom of the support column. A threaded rod is screwed into the threaded hole. A handwheel is located at the bottom of the threaded rod. A through hole is located at the center of the top of the threaded head for the threaded rod to pass through. An external thread is located on the outer circumference of the support column.

[0007] Furthermore, a second metal plate support assembly is also provided on the circular platform. The second metal plate support assembly includes a second threaded head that is screwed into the upper threaded groove by a thread. A second support column is provided at one end of the second threaded head away from the circular platform. A flange is provided at the top of the second support column, and an external thread is provided on the outer circumferential surface of the second support column.

[0008] Furthermore, four threaded posts are symmetrically arranged on the outer side wall of the horizontal metal plate, and a metal plate limiting component is provided on the threaded posts. The metal plate limiting component includes a threaded sleeve that is screwed onto the threaded posts by threads. One end of the threaded sleeve is rotatably connected to a limiting cover, and a limiting groove is formed on the outer wall of the limiting cover on the side away from the threaded sleeve.

[0009] Furthermore, both the first and second support columns are provided with a metal plate limiting component 2. The metal plate limiting component 2 includes a threaded sleeve 2 that is screwed onto the first and second support columns by threads. Both the first and second external threads are screwed onto the threaded sleeve 2. One end of the threaded sleeve 2 is rotatably connected to a rotating ring. On the outer wall of the rotating ring away from the threaded sleeve 2, four limiting plates 1 and four limiting plates 2 are respectively provided at equal intervals in the circumferential direction. The limiting plates 1 and the limiting plates 2 are parallel to each other.

[0010] Furthermore, the horizontal metal plate has a square cross-section, and the horizontal metal plate is perpendicular to the fixed platform. When the fixed platform and the vertical metal plate are in the same plane, they form an isosceles right triangle, which coincides with one-quarter of the area of ​​the horizontal metal plate. By adopting the above technical solution, four horizontal regions with cross-sections of isosceles right triangles can be formed by a horizontal metal plate with a square cross-section, thereby forming a corner reflector perpendicular to two vertical metal plates. By using a fixed platform perpendicular to the horizontal metal plate, after the vertical metal plate is rotated 90 degrees and coincides with the fixed platform, the vertical metal plate can be perpendicular to the horizontal metal plate.

[0011] Furthermore, the outer wall of the disk fits against the inner wall of the inner cavity, the threaded rod can pass through the limiting ring and abut against the bottom of the disk, and the gear and the gear plate are connected by gear teeth meshing. By adopting the above technical solution, the inner cavity can limit the lifting and moving of the disc, ensuring stable movement of the disc within the inner cavity. During the rotation of the threaded rod, one end moves upward, which in turn pushes the disc upward. This causes the toothed plate on top of the disc to move upward synchronously. Utilizing the meshing transmission between the toothed plate and the gear, the gear can be rotated while the toothed plate is moving linearly, thereby causing the horizontal metal plate to rotate. This enables the horizontal metal plate to unfold and fold, reducing the size of the high-speed radar reflector and facilitating transportation, storage, and installation.

[0012] Furthermore, one side wall of the vertical metal plate abuts against the outer peripheral surfaces of support column one and support column two; By adopting the above technical solution, support column one and support column two can be used to support the vertical metal plate that is perpendicular to the horizontal metal plate, ensuring the structural strength of the vertical metal plate when it is in a vertical state and preventing the vertical metal plate from being bent by external forces.

[0013] Furthermore, anti-slip grooves are provided on the outer circumferential surfaces of the threaded sleeve one and the threaded sleeve two; By adopting the above technical solution, the anti-slip groove can increase the frictional resistance when the threaded sleeve 1 and threaded sleeve 2 come into contact with the hand, thereby facilitating the rotation of the threaded sleeve 1 and threaded sleeve 2.

[0014] Furthermore, the inner wall of the limiting slot is in contact with the outer wall of the vertical metal plate and the outer wall of the fixing platform, and the cross-section of the limiting cover is "+" shaped. By adopting the above technical solution, the "+" shaped limiting cover can be fitted onto both sides of the horizontal metal plate and one side of the two vertical metal plates using its limiting slots, forming a fastening limiting structure. This ensures a firm connection at the corners of the horizontal and vertical metal plates, keeping the vertical and horizontal metal plates perpendicular and preventing changes in angle from affecting the all-round reflection of the signal.

[0015] Furthermore, the space formed between the first limiting plate and the second limiting plate is fitted over the outside of the vertical metal plate in a vertical state; By adopting the above technical solution, four such spaces can be used to limit one side of the four vertical metal plates, ensuring that the adjacent vertical metal plates are perpendicular to each other, and avoiding changes in angle that would affect the all-round reflection of the signal.

[0016] The beneficial effects of this invention are as follows: 1. This invention enables the radar reflector to be folded and unfolded by adjusting the angle between the horizontal and vertical metal plates. In the folded state, the radar reflector is in a plate-like structure, which not only greatly reduces the volume and space occupied, but also makes the plate-like structure of the radar reflector easier to store, transport and install. In the unfolded state, it can form a radar reflector with multi-directional signal reflection. Furthermore, it effectively avoids contact between the metal plates and the hands of the installers during installation and unfolding operations, thus preventing injuries. 2. This invention, through the "+" shaped limiting cover and the combined limiting plate one and limiting plate two, can not only limit the two ends of the horizontal metal plate and one end of the two vertical metal plates, ensuring a firm connection at the corners of the horizontal and vertical metal plates, and keeping the vertical and horizontal metal plates perpendicular, thus avoiding changes in angle after being impacted by external forces that affect the all-round reflection of the signal, but also limit one end of the four vertical metal plates, ensuring that adjacent vertical metal plates are perpendicular to each other, further avoiding changes in angle that affect the all-round reflection of the signal.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2This is a schematic diagram of the cooperation between the horizontal and vertical metal plates in an embodiment of the present invention; Figure 3 This is a schematic diagram of the cooperation between the horizontal metal plate and the metal plate folding assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the vertical metal plate structure according to an embodiment of the present invention; Figure 5 This is a three-dimensional cross-sectional schematic diagram of a frustum according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a metal plate support assembly according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the second metal plate support assembly according to an embodiment of the present invention; Figure 8 This is a schematic diagram of a metal plate limiting assembly according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the second metal plate limiting component according to an embodiment of the present invention; Reference numerals: 1. Horizontal metal plate; 11. Fixed platform; 111. Rotating groove; 112. Connecting hole; 12. Rotating rod; 121. Rotating block; 122. Vertical metal plate; 123. Gear; 13. Threaded column; 2. Metal plate folding assembly; 21. Frustum; 22. Inner cavity; 23. Disc; 24. Toothed plate; 25. Limiting ring; 26. Lower threaded groove; 27. Upper threaded groove; 3. Metal plate support assembly one; 31. Support column one; 3 2. Threaded head one; 33. Threaded hole; 34. Threaded rod; 35. Handwheel; 36. External thread one; 4. Metal plate support assembly two; 41. Support column two; 42. Threaded head two; 43. Flange; 44. External thread two; 5. Metal plate limiting assembly one; 51. Threaded sleeve one; 52. Limiting cover; 53. Limiting slot; 6. Metal plate limiting assembly two; 61. Threaded sleeve two; 62. Rotating ring; 63. Limiting plate one; 64. Limiting plate two. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1 Reference Figure 1-6This invention proposes a high-speed radar reflector suitable for low-altitude detection radar, comprising a horizontal metal plate 1. Four fixed platforms 11 are symmetrically arranged at the top and bottom of the horizontal metal plate 1. A rotating groove 111 is formed at the center of the top of each fixed platform 11. A connecting hole 112 is formed on the inner wall of the rotating groove 111. A rotating rod 12 is embedded inside the connecting hole 112. A rotating block 121 is arranged on the outer circumference of the rotating rod 12. A vertical metal plate 122 is integrally formed on one outer wall of the rotating block 121. The horizontal metal plate 1 has a square cross-section, and the horizontal metal plate 1 is perpendicular to the fixed platforms 11. After the vertical metal plate 122 is in the same plane, it forms an isosceles right triangle and coincides with one-quarter of the area of ​​the horizontal metal plate 1. The horizontal metal plate 1 with a square cross-section can form four horizontal areas with cross-sections of isosceles right triangles, thus forming corner reflectors perpendicular to each other with the two vertical metal plates 122. The fixed platform 11 is perpendicular to the horizontal metal plate 1. After the vertical metal plate 122 is rotated 90 degrees and coincides with the fixed platform 11, the vertical metal plate 122 can be perpendicular to the horizontal metal plate 1. A gear 123 is provided at one end of the rotating rod 12, and a metal plate folding assembly 2 is provided on the horizontal metal plate 1. The metal plate folding assembly 2 includes a frustum 21 that is fixed to the center of the top of a horizontal metal plate 1. An inner cavity 22 is formed at the center of the frustum 21. A rotating rod 12 passes through the frustum 21 and one end of the rotating rod 12 is located inside the inner cavity 22. A gear 123 at one end of the rotating rod 12 is located inside the inner cavity 22. By rotating the gear 123, the rotating rod 12 can be rotated, thereby rotating the horizontal metal plate 1 and changing the horizontal metal plate 1 from a folded state to a vertical state, thus forming a high-speed radar reflector. A disc 23 is provided at the lower part of the inner cavity 22. A toothed plate 24 is provided on the top of the disc 23. A limit ring 25 is provided at the bottom of the inner cavity 22. A lower threaded groove 26 is formed at the center of the top of the frustum 21. The inner cavity 22 and the lower threaded groove 26 are connected, allowing the disc 23 to be pushed and move upward in the inner cavity 22. An upper threaded groove 27 is formed at the center of the bottom of the frustum 21. A metal plate support assembly 3 is provided on the frustum 21. The metal plate support assembly 3 includes a threaded head 32 screwed into the lower threaded groove 26. A support column 31 is located at the end of the threaded head 32 furthest from the frustum 21. A threaded hole 33 is located at the center of the bottom end of the support column 31. A threaded rod 34 is screwed into the threaded hole 33. The outer wall of the disc 23 fits against the inner wall of the cavity 22. The threaded rod 34 passes through the limiting ring 25 and abuts against the bottom of the disc 23. The gear 123 and the gear plate 24 are connected by meshing teeth. The inner cavity 22 limits the lifting and lowering movement of the disc 23, ensuring stable movement of the disc 23 within the cavity 22. During the rotation of the threaded rod 34, one end moves upward, thereby pushing the disc. 23 moves upward, thereby causing the toothed plate 24 on the top of the disk 23 to move upward synchronously. Utilizing the meshing transmission between the toothed plate 24 and the gear 123, the gear 123 can be driven to rotate when the toothed plate 24 moves linearly, thereby causing the horizontal metal plate 1 to rotate, realizing the unfolding and folding of the horizontal metal plate 1, reducing the volume of the high-speed radar reflector, and facilitating transportation, storage and installation. A handwheel 35 is provided at the bottom end of the threaded rod 34, and a through hole is provided at the top center of the threaded head 32 for the threaded rod 34 to pass through, allowing the threaded rod 34 to pass through the threaded head 32 and one end of the threaded rod 34 to pass through the limiting ring 25 and contact the disk 23, thereby pushing the disk 23 to move linearly. An external thread 36 is provided on the outer circumferential surface of the support column 31. To facilitate the folding and unfolding of the high-speed radar reflector, this embodiment adjusts the angle between the horizontal metal plate 1 and the vertical metal plate 122 to enable the radar reflector to fold and unfold. This reduces the volume of the radar reflector in the folded state, minimizing space occupation and facilitating transportation and installation. Specifically, the initial state of the high-speed radar reflector after processing is as follows: the vertical metal plate 122 is stacked on the horizontal metal plate 1, with a 0-degree angle between them. At this point, the entire high-speed radar reflector is a plate-like structure, which not only significantly reduces volume but also facilitates storage and transportation. After the high-speed radar reflector is transported to the required installation location, support columns 31 and 41 are fixed to both ends of the frustum 21. The threaded head 42 is screwed into the upper threaded groove 27, and the threaded head 32 is screwed into the lower threaded groove 26, thus achieving a fixed connection between support columns 31 and 41 and the frustum 21. Then, the flange... 43 is docked and fixed to the required installation location. After the initial installation of the high-speed radar reflector is completed, the handwheel 35 is turned. The threaded rod 34 on the handwheel 35 rotates synchronously. Through the threaded connection between the threaded rod 34 and the support column 31, the threaded rod 34 passes through the limiting ring 25 and abuts against the disc 23. Since one end of the threaded rod 34 moves, the threaded rod 34 can push the disc 23 to move. At this time, the toothed plate 24 on the disc 23 moves synchronously. Utilizing the meshing transmission between the toothed plate 24 and the gear 123, the gear 123 can be pulled to rotate when the toothed plate 24 moves linearly. The rotating rod 12, which is fixed to the gear 123, rotates synchronously, thereby causing the horizontal metal plate 1 to rotate. When the toothed plate 24 moves to the maximum position (the toothed plate 24 is limited after contacting one inner end of the inner cavity 22 and cannot continue to move), the rotating rod 12 rotates 90 degrees. The vertical metal plate 122 is perpendicular to the horizontal metal plate 1, realizing the deployment of the high-speed radar reflector and completing the installation of the high-speed radar reflector.

[0021] Example 2 Reference Figure 1 , Figure 7-9Based on the above embodiments, this embodiment of the invention also proposes a frustum 21, on which a metal plate support assembly 24 is also provided. The metal plate support assembly 24 includes a threaded head 242 screwed into the upper threaded groove 27. A support column 241 is provided at the end of the threaded head 242 away from the frustum 21. One side wall of the vertical metal plate 122 abuts against the outer peripheral surfaces of the support column 1 31 and the support column 2 41. The support column 1 31 and the support column 2 41 can support the vertical metal plate 122 which is perpendicular to the horizontal metal plate 1, ensuring the structural strength of the vertical metal plate 122 when it is in a vertical state and preventing the vertical metal plate 122 from being bent by external forces. A flange 43 is provided at the top of the support column 2 41, and an external thread 2 44 is provided on the outer peripheral surface of the support column 2 41. Four threaded columns 13 are symmetrically arranged on the outer side wall of the horizontal metal plate 1. A metal plate limiting assembly 5 is provided. The metal plate limiting assembly 5 includes a threaded sleeve 51 that is screwed onto a threaded post 13. One end of the threaded sleeve 51 is rotatably connected to a limiting cover 52. A limiting groove 53 is provided on the outer wall of the limiting cover 52 away from the threaded sleeve 51. The inner wall of the limiting groove 53 fits against the outer wall of the vertical metal plate 122 and the outer wall of the fixing platform 11. The cross-section of the limiting cover 52 is "+" shaped. The "+" shaped limiting cover 52 can be fitted onto both ends of the horizontal metal plate 1 and one end of the two vertical metal plates 122 through the limiting groove 53, forming a fastening limiting structure. This ensures that the connection between the horizontal metal plate 1 and the vertical metal plate 122 at the corners is firm, so that the vertical metal plate 122 and the horizontal metal plate 1 remain vertical, avoiding changes in angle that affect the all-round reflection of the signal. Both support column 1 (31) and support column 2 (41) are equipped with metal plate limiting components 2 (6). Each metal plate limiting component 2 (6) includes a threaded sleeve 2 (61) screwed onto support column 1 (31) and support column 2 (41). Anti-slip grooves are formed on the outer circumferential surfaces of threaded sleeve 1 (51) and threaded sleeve 2 (61). These anti-slip grooves increase the frictional resistance when threaded sleeve 1 (51) and threaded sleeve 2 (61) come into contact with the hand, thus facilitating the rotation of threaded sleeve 1 (51) and threaded sleeve 2 (61). External threads 1 (36) and 2 (44) are screwed onto threaded sleeve 2 (61). One end of threaded sleeve 2 (61)... A rotating ring 62 is rotatably connected. On the outer wall of the rotating ring 62 away from the threaded sleeve 61, four limiting plates 63 and four limiting plates 64 are circumferentially spaced at equal intervals. The limiting plates 63 and 64 are parallel to each other. The space formed between the limiting plates 63 and 64 is fitted over the outside of the vertical metal plate 122. The four sets of such spaces can limit one end of the four vertical metal plates 122, ensuring that the adjacent vertical metal plates 122 are perpendicular to each other, and avoiding changes in angle that affect the all-round reflection of the signal. To limit the horizontal metal plate 1 and vertical metal plate 122 on the deployed high-speed radar reflector, ensuring structural strength when the horizontal and vertical metal plates 122 are in a vertical state and preventing deformation from external impacts, this embodiment uses a cross-shaped limiting cover 52 and combined limiting plates 63 and 64 to limit both ends of the horizontal metal plate 1 and one end of the two vertical metal plates 122, ensuring a firm connection at the corners of the horizontal and vertical metal plates 122, and making the vertical... The metal plate 122 and the horizontal metal plate 1 remain perpendicular to each other to prevent changes in angle caused by external impact from affecting the omnidirectional reflection of the signal. Furthermore, one end of each of the four vertical metal plates 122 can be limited to ensure that adjacent vertical metal plates 122 are perpendicular to each other, further preventing changes in angle from affecting the omnidirectional reflection of the signal. Specifically, when the high-speed radar reflector is deployed, the threaded sleeve 51 is screwed onto the threaded post 13. As the threaded sleeve 51 rotates, it pushes the limiting cover 52 towards the horizontal. As the metal plate 1 and the vertical metal plate 122 move, when the threaded sleeve 51 is about to contact, the limiting cover 52 is held so that the limiting groove 53 on the limiting cover 52 coincides with the horizontal metal plate 1 and the vertical metal plate 122. Then, the threaded sleeve 51 continues to rotate. With the pushing of the threaded sleeve 51, the limiting groove 53 on the limiting cover 52 can fit onto both sides of the horizontal metal plate 1 and one side of the two vertical metal plates 122, forming a fastening limiting structure, thereby ensuring that the corners of the horizontal metal plate 1 and the vertical metal plate 122 are connected. After the connection is secure, finally, rotate the threaded sleeve 61 on the support column 31 and the support column 41. As the threaded sleeve 61 rotates, it pushes the rotating ring 62 toward the vertical metal plate 122. When they are about to make contact, hold the rotating ring 62 and make the space formed between the limiting plate 63 and the limiting plate 64 fit over the outside of the vertical metal plate 122. By using four such spaces, one side of the four vertical metal plates 122 can be limited to ensure that the adjacent vertical metal plates 122 are perpendicular to each other.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed radar reflector suitable for low-altitude detection radar, characterized in that: The system includes a horizontal metal plate (1), on which four fixed platforms (11) are symmetrically arranged at the top and bottom. A rotating groove (111) is provided at the center of the top of each fixed platform (11). A connecting hole (112) is provided on the inner side wall of the rotating groove (111). A rotating rod (12) is embedded in the connecting hole (112). A rotating block (121) is provided on the outer circumference of the rotating rod (12). A vertical metal plate (122) is integrally formed on one side outer wall of the rotating block (121). A gear (123) is provided at one end of the rotating rod (12). A metal plate folding assembly (2) is provided on the horizontal metal plate (1). The metal plate folding assembly (2) includes a frustum (21) that is fixed to the center of the top of the horizontal metal plate (1). An inner cavity (22) is provided at the center of the inside of the frustum (21). The rotating rod (12) passes through the frustum (21) and one end of it is located inside the inner cavity (22). A disc (23) is provided at the lower part of the inside of the inner cavity (22). A toothed plate (24) is provided at the top of the disc (23). A limit ring (25) is provided at the bottom of the inside of the inner cavity (22). A lower threaded groove (26) is provided at the center of the top of the frustum (21). The inner cavity (22) and the lower threaded groove (26) are connected. An upper threaded groove (27) is provided at the center of the bottom of the frustum (21). A metal plate support assembly (3) is provided on the frustum (21). The metal plate support assembly (3) includes a threaded head (32) screwed into the lower threaded groove (26). A support column (31) is provided at one end of the threaded head (32) away from the frustum (21). A threaded hole (33) is provided at the center of the bottom end of the support column (31). A threaded rod (34) is screwed into the threaded hole (33). A handwheel (35) is provided at the bottom end of the threaded rod (34). A through hole is provided at the center of the top of the threaded head (32) for the threaded rod (34) to pass through. An external thread (36) is provided on the outer circumferential surface of the support column (31).

2. A high-speed radar reflector suitable for low-altitude detection radar according to claim 1, characterized in that: The truncated cone (21) is also provided with a metal plate support assembly two (4). The metal plate support assembly two (4) includes a threaded head two (42) that is screwed into the upper threaded groove (27). A support column two (41) is provided at one end of the threaded head two (42) away from the truncated cone (21). A flange (43) is provided at the top of the support column two (41), and an external thread two (44) is provided on the outer circumferential surface of the support column two (41).

3. A high-speed radar reflector suitable for low-altitude detection radar according to claim 1, characterized in that: Four threaded posts (13) are symmetrically arranged on the outer wall of the horizontal metal plate (1). A metal plate limiting component (5) is provided on the threaded post (13). The metal plate limiting component (5) includes a threaded sleeve (51) screwed onto the threaded post (13). One end of the threaded sleeve (51) is rotatably connected to a limiting cover (52). A limiting groove (53) is opened on the outer wall of the limiting cover (52) away from the threaded sleeve (51).

4. A high-speed radar reflector suitable for low-altitude detection radar according to claim 2, characterized in that: Metal plate limiting component 2 (6) is provided on both support column 1 (31) and support column 2 (41). Metal plate limiting component 2 (6) includes threaded sleeve 2 (61) screwed onto support column 1 (31) and support column 2 (41) by thread. External thread 1 (36) and external thread 2 (44) are screwed onto threaded sleeve 2 (61). One end of threaded sleeve 2 (61) is rotatably connected to a rotating ring (62). On the outer wall of the rotating ring (62) away from threaded sleeve 2 (61), four limiting plates 1 (63) and four limiting plates 2 (64) are provided circumferentially at equal intervals. The limiting plates 1 (63) and limiting plates 2 (64) are parallel to each other.

5. A high-speed radar reflector suitable for low-altitude detection radar according to claim 1, characterized in that: The horizontal metal plate (1) has a square cross-section and is perpendicular to the fixed platform (11). When the fixed platform (11) and the vertical metal plate (122) are in the same plane, they form an isosceles right triangle and coincide with one-quarter of the area of ​​the horizontal metal plate (1).

6. A high-speed radar reflector suitable for low-altitude detection radar according to claim 1, characterized in that: The outer wall of the disc (23) fits against the inner wall of the inner cavity (22), the threaded rod (34) can pass through the limiting ring (25) and abut against the bottom of the disc (23), and the gear (123) and the toothed plate (24) are connected by gear teeth meshing.

7. A high-speed radar reflector suitable for low-altitude detection radar according to claim 2, characterized in that: One side wall of the vertical metal plate (122) abuts against the outer periphery of support column one (31) and support column two (41).

8. A high-speed radar reflector suitable for low-altitude detection radar according to claim 4, characterized in that: Anti-slip grooves are provided on the outer circumferential surfaces of threaded sleeve one (51) and threaded sleeve two (61).

9. A high-speed radar reflector suitable for low-altitude detection radar according to claim 3, characterized in that: The inner wall of the limiting slot (53) is in contact with the outer wall of the vertical metal plate (122) and the outer wall of the fixing platform (11), and the cross-section of the limiting cover (52) is "+".

10. A high-speed radar reflector suitable for low-altitude detection radar according to claim 4, characterized in that: The space formed between the first limiting plate (63) and the second limiting plate (64) is fitted over the outside of the vertical metal plate (122) which is in a vertical state.

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