Electromagnetic shielding structure between edge and surface gap of rotary table

Abstract

The utility model relates to an electromagnetic shielding structure between an edge and a surface gap of a rotary table, and belongs to the technical field of semi-anechoic chamber testing equipment. The electromagnetic shielding structure is formed by arranging and arranging the metal bending piece, the annular copper net, the metal connecting piece and the like between the edge and the surface gap of the rotary table, so that the problem of electrical continuity of the seam and the whole bottom surface is solved, and electromagnetic waves leaked from a pit are effectively shielded; electromagnetic waves radiated into the gap in a laboratory can be reflected. Besides, a double-layer metal rotary plate structure is further arranged on the rotary table, and electromagnetic waves of all wave bands are totally reflected to the maximum extent through the peak shifting design between the plates.

Description

Technical Field

[0001] This utility model relates to an electromagnetic shielding structure between the edge and surface gap of a rotary table, belonging to the technical field of semi-anechoic chamber testing equipment. Background Technology

[0002] Currently, radiation and immunity testing of advanced driver assistance systems (ADAS) in automobiles is mostly conducted in semi-anechoic chambers, according to relevant national standards. Semi-anechoic chambers provide a relatively clean electromagnetic environment, reducing the impact of external electromagnetic interference on test results. However, as automotive technology evolves towards more complex systems, current monitoring equipment for vehicle ADAS in both passenger and commercial vehicles, as well as existing monitoring equipment in semi-anechoic chambers, are showing shortcomings in meeting future testing requirements.

[0003] When the vehicle is tested in a semi-anechoic chamber, it not only needs to run at a certain speed but also needs to perform a 360-degree rotation. During this process, the gap between the turntable and the laboratory floor caused a series of thorny technical problems.

[0004] First, there's the issue of electrical continuity. Ensuring the electrical continuity of the equipment is crucial in electromagnetic radiation immunity testing. The gap between the turntable and the laboratory floor disrupts this electrical continuity, causing discontinuities in current flow. This not only affects the accurate acquisition and analysis of electromagnetic signals by the testing equipment but may also generate additional electromagnetic interference, leading to inaccurate test results. During vehicle rotation, the presence of the gap causes abrupt changes in current at the gap, generating electromagnetic noise and interfering with the testing system's assessment of the vehicle's driver assistance system's true electromagnetic radiation immunity.

[0005] Secondly, there is the issue of electrical leakage. During the rotation of the rotary table, the gap between it and the fixed floor is prone to leakage. This is because the insulation performance at the gap is difficult to guarantee; when the current generated by the vehicle's operation passes through the rotary table, some of the current may leak through the gap onto the laboratory floor. Electrical leakage not only damages the testing equipment but can also pose safety hazards. If the leakage is severe, it may cause a short circuit in the testing equipment, affecting the normal conduct of the test, and even threatening the personal safety of the testing personnel.

[0006] Finally, there's the issue of shielding. One of the main functions of a semi-anechoic chamber is to shield against external electromagnetic interference and prevent electromagnetic signals generated during internal testing from leaking out. However, the gap between the turntable and the laboratory floor becomes a weak point in the shielding. External electromagnetic interference can enter the anechoic chamber through these gaps, affecting the purity of the testing environment. Simultaneously, electromagnetic signals generated by the vehicle during testing may also leak out through these gaps, interfering with the normal operation of other surrounding electronic equipment and potentially leading to inaccurate test data. Furthermore, the presence of these gaps makes the electromagnetic environment inside the anechoic chamber more complex, difficult to control and measure precisely, posing a significant challenge for advanced driver assistance systems and complex automotive systems requiring high-precision testing.

[0007] In summary, current semi-anechoic chambers urgently need to address the aforementioned technical challenges in order to achieve more accurate and comprehensive testing and recording of vehicles in advanced driver assistance systems and complex system operation. Utility Model Content

[0008] To solve the above problems, this utility model provides an electromagnetic shielding structure between the edge of a rotary table and the surface gap, comprising:

[0009] A metal bending component is embedded in the laboratory floor on one side near the edge of the turntable, and a fixed metal plate is laid above the metal bending component and the laboratory floor;

[0010] A first metal rotating plate is set on the top of the rotating platform. A joint is left between the edge of the first metal rotating plate and the fixed metal plate laid above the laboratory floor. At least a portion of the edge of the first metal rotating plate has a gap space between it and the pit.

[0011] The ring-shaped copper mesh is elastic and is disposed in the gap space. The ring-shaped copper mesh is connected to the metal bending component through a metal connecting bracket.

[0012] Furthermore, a second metal rotating plate is provided between the first metal rotating plate and the rotating table.

[0013] Furthermore, the diameter of the second metal rotating plate is smaller than that of the first metal rotating plate, and the edge of the second metal rotating plate is misaligned with the edge of the first metal rotating plate, forming a gap space between them and the pit.

[0014] Furthermore, the annular copper mesh is disposed at the misalignment between the edge of the second metal rotating plate and the edge of the first metal rotating plate.

[0015] Furthermore, the top of the annular copper mesh is in close contact with the bottom edge of the first metal rotating plate and undergoes elastic deformation.

[0016] Furthermore, the metal bending member is a C-shaped metal member, embedded in the side of the laboratory floor near the edge of the turntable, and the metal bending member at least covers or fits a portion of the adjacent upper and lower surfaces of the side of the laboratory floor.

[0017] Furthermore, the metal connecting bracket is a Z-shaped metal component, with one end passing through an annular copper mesh and fixing the annular copper mesh to the side of the second metal rotating plate, and the other end connected to the bottom of the metal bending component.

[0018] Furthermore, the first metal rotating plate and the second metal rotating plate are made of carbon steel plate and stainless steel plate, respectively.

[0019] The beneficial effects of this utility model are:

[0020] This invention solves the problem of electrical continuity at the joints and on the overall bottom surface by setting and arranging metal bent parts, annular copper mesh, and metal connectors between the edges and surface gaps of the rotary table to form an electromagnetic shielding structure. This effectively shields electromagnetic waves leaking from the pit and reflects electromagnetic waves radiated from the laboratory into the gaps. Furthermore, this invention also features a double-layered metal rotating plate structure on the rotary table. Through the staggered design between the plates, it maximizes the total reflection of electromagnetic waves across all bands. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the connection between the rotary table and the laboratory floor in one embodiment of the present invention.

[0022] Figure 2 This is a cross-sectional schematic diagram of the connection between the rotary table and the laboratory floor in one embodiment of the present invention.

[0023] In the diagram: 1. First metal rotating plate; 2. Second metal rotating plate; 3. Fixed metal plate; 4. Metal bending component; 5. Joint; 6. Laboratory floor; 7. Metal connecting bracket; 8. Annular copper mesh; 9. Pit; 10. Rotary table. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 1 As shown, this utility model provides an electromagnetic shielding structure between the edge of the rotary table 10 and the surface gap of the laboratory floor 6 (with a fixed metal plate 3 on top), including a metal bending member 4, a first metal rotary plate 1, a second metal rotary plate 2, an annular copper mesh 8, and a metal connecting bracket 7.

[0028] exist Figure 2 In the example, the metal bending component 4 is a C-shaped metal component, embedded in the side of the laboratory floor 6 near the edge of the turntable. Because the C-shaped structure of the metal bending component 4 is a semi-enclosed structure, after being fixed, it can precisely cover the side of the laboratory floor 5 and fit a portion of the upper and lower surfaces adjacent to the side of the laboratory floor 6. The upper surface of the upper branch of the C-shaped structure can be flush with the upper surface of the laboratory floor 6. Furthermore, a fixing metal plate 3 is laid above the metal bending component 4 and the laboratory floor 5.

[0029] exist Figure 2In the example, a first metal rotating plate 1 is positioned on top of a rotating platform 10. A seam 5 is left between the edge of the first metal rotating plate 1 and the fixed metal plate 3 laid above the laboratory floor 6. A second metal rotating plate 2 is positioned between the first metal rotating plate and the rotating platform, effectively creating two layers of metal rotating plates on top of the rotating platform 10. The diameter of the second metal rotating plate is smaller than that of the first metal rotating plate. Therefore, a portion of the difference between the edge of the second metal rotating plate and the edge of the first metal rotating plate creates an L-shaped misalignment area. This L-shaped misalignment area forms a gap space with the edge of the pit below, which is used to accommodate the annular copper mesh 8. The annular copper mesh 8 is positioned in the L-shaped misalignment area between the edge of the second metal rotating plate 2 and the edge of the first metal rotating plate. Within this misalignment area, the top of the annular copper mesh 8 is in close contact with the bottom edge of the first metal rotating plate 1, and the top undergoes a certain elastic deformation. The sides and bottom of the annular copper mesh 8 may have a small gap with the edge of the misalignment area or the gap space.

[0030] In some embodiments of this utility model, the annular copper mesh 8 is an annular mesh supported by an elastic material, which can be compressed in any direction.

[0031] In some embodiments of this utility model, the metal connecting bracket 7 is a Z-shaped metal part, one end of which passes through the annular copper mesh 8 and fixes the annular copper mesh 8 to the side of the second metal rotating plate 2, and the other end is connected to the bottom of the metal bending part 7.

[0032] Preferably, the first metal rotating plate 1 and the second metal rotating plate 2 are made of carbon steel plate and stainless steel plate, respectively, and the two reflect electromagnetic wave frequencies differently.

[0033] The rotary table 10 is connected to the annular copper mesh 8, the metal connecting bracket 7, the metal bending piece 4, and the fixed metal plate 3 above the laboratory floor 6 in sequence through the first metal rotary plate 1 and the second metal rotary plate 2 to form an integrated conductor, thereby solving the problem of electrical continuity.

[0034] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. An electromagnetic shielding structure between the edge and surface gap of a rotary table, characterized in that, include: A metal bending component is embedded in the laboratory floor on one side near the edge of the turntable, and a fixed metal plate is laid above the metal bending component and the laboratory floor; A first metal rotating plate is set on the top of the rotating platform. A joint is left between the edge of the first metal rotating plate and the fixed metal plate laid above the laboratory floor. At least a portion of the edge of the first metal rotating plate has a gap space between it and the pit. The ring-shaped copper mesh is elastic and is disposed in the gap space. The ring-shaped copper mesh is connected to the metal bending component through a metal connecting bracket.

2. The electromagnetic shielding structure according to claim 1, characterized in that, A second metal rotating plate is provided between the first metal rotating plate and the rotating table.

3. The electromagnetic shielding structure according to claim 2, characterized in that, The diameter of the second metal rotating plate is smaller than that of the first metal rotating plate, and the edge of the second metal rotating plate is misaligned with the edge of the first metal rotating plate, forming a gap space between them and the pit.

4. The electromagnetic shielding structure according to claim 3, characterized in that, The annular copper mesh is positioned at the misalignment between the edge of the second metal rotating plate and the edge of the first metal rotating plate.

5. The electromagnetic shielding structure according to claim 4, characterized in that, The top of the annular copper mesh is in close contact with the bottom edge of the first metal rotating plate and undergoes elastic deformation.

6. The electromagnetic shielding structure according to claim 5, characterized in that, The metal bending component is a C-shaped metal component that is embedded in the side of the laboratory floor near the edge of the turntable. The metal bending component at least covers or fits a portion of the upper and lower surfaces adjacent to the side of the laboratory floor.

7. The electromagnetic shielding structure according to claim 6, characterized in that, The metal connecting bracket is a Z-shaped metal component, with one end passing through an annular copper mesh and fixing the annular copper mesh to the side of the second metal rotating plate, and the other end connected to the bottom of the metal bending component.

8. The electromagnetic shielding structure according to claim 7, characterized in that, The first metal rotating plate and the second metal rotating plate are made of carbon steel plate and stainless steel plate, respectively.

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