Wedge assembly and wave absorbing device

Abstract

The utility model discloses a wedge assembly and a wave absorbing device. The wedge assembly comprises a wedge substrate and further comprises a first wedge unit and a second wedge unit, the second wedge unit comprises a plurality of wedge pieces, the wedge pieces are sequentially connected to the wedge substrate in the annular direction and define a cavity, and the first wedge unit is arranged on the wedge substrate and located in the cavity. According to the wedge assembly provided by the utility model, the first wedge unit and the second wedge unit are arranged on the wedge substrate, the second wedge unit comprises the plurality of wedge sheets, the contact area of the wedge and air can be increased through the first wedge unit and the plurality of wedge sheets, and the absorption efficiency of electromagnetic waves is improved.

Description

Technical Field

[0001] This utility model relates to the field of anechoic chamber technology, and in particular to a wedge assembly and a wave-absorbing device. Background Technology

[0002] An absorbing wedge is a special structure used to absorb electromagnetic wave energy. It is commonly used in microwave anechoic chambers, electromagnetic compatibility testing, and radar absorbing materials to reduce electromagnetic wave reflection and interference. Absorbing wedges are typically conical or pyramidal in shape, with their cross-section gradually increasing from the tip to the base. This structure helps electromagnetic waves to be gradually absorbed during propagation, reducing reflection. The shape design of the absorbing wedge causes its impedance to gradually change, matching the air impedance and reducing electromagnetic wave reflection at the interface.

[0003] Existing absorbing wedges are generally composed of several conical structures arranged in an array on the base. This structure has the following problems: (1) the contact area between the wedge and the air is small, and (2) the area of ​​the base is limited, so the number of conical structures can be limited, thus limiting the absorption of electromagnetic waves. Therefore, there is an urgent need for a wedge assembly and absorbing device to solve the above problems. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a wedge assembly, comprising a wedge substrate, a first wedge unit, and a second wedge unit. The second wedge unit comprises a plurality of wedges, each of which is sequentially connected to the wedge substrate in a circumferential direction and encloses a cavity. The first wedge unit is disposed on the wedge substrate and located within the cavity.

[0005] Furthermore, there are multiple first wedge units, and the multiple first wedge units are arranged in an array on the wedge substrate.

[0006] Furthermore, the angle between the surface of each wedge and the surface of the wedge substrate is an acute angle, the cavity is conical and the cross-sectional area of ​​one end near the wedge substrate is larger than the cross-sectional area of ​​the other end, and a portion of the surface of each wedge is located outside the cavity.

[0007] Furthermore, each of the wedges has a first latch on its sidewall and a first slot on its surface, wherein the first latch on the wedge engages with the first slot on the adjacent wedges.

[0008] Furthermore, the mounting area of ​​the wedge substrate is provided with a plurality of second slots, and each wedge has a second latch at one end near the wedge substrate, and each second latch is engaged with a second slot in a one-to-one manner.

[0009] Furthermore, it also includes a decorative panel, which is disposed at one end of the wedge away from the wedge substrate, and the decorative panel is provided with a mounting portion, on which each of the wedges is connected.

[0010] Furthermore, the mounting portion of the decorative panel is provided with a plurality of third slots, and each of the wedges is provided with a third tongue at one end facing the decorative panel, and each of the third tongues is engaged with each of the third slots in a corresponding manner.

[0011] Furthermore, the decorative panel is glued and fixed to each of the wedges.

[0012] On the other hand, the present invention also provides a wave absorbing device, including a plurality of wedge components, wherein the plurality of wedge components are arranged in an array, and the wedge components are wedge components as described above.

[0013] Furthermore, it also includes a substrate assembly and a first absorbing layer, wherein the first absorbing layer is disposed on the substrate assembly, and each of the wedge assemblies is disposed on the first absorbing layer.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0015] 1) The wedge assembly provided by this utility model has a first wedge unit and a second wedge unit on the wedge substrate. The second wedge unit includes multiple wedge blades. The contact area between the wedge and the air can be increased by the first wedge unit and the multiple wedge blades, thereby improving the absorption efficiency of electromagnetic waves.

[0016] 2) The wedge assembly provided by this utility model uses the same specifications to manufacture each wedge, which facilitates the use of spare parts and saves mold opening costs. The wedges are snapped and fixed to the wedge base plate and to adjacent wedges, with reliable connection strength and convenient assembly and disassembly.

[0017] 3) The absorbing device provided by this utility model adopts a gradient design of substrate component-reflective surface layer-first absorbing layer-second absorbing layer to achieve full-band absorption from low frequency to high frequency, optimize electromagnetic performance, and achieve good reflection loss effect.

[0018] 4) The wave-absorbing device provided by this utility model adopts a layered installation process, and each layer can be constructed independently without interference, which improves construction efficiency and shortens the construction period. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Explosion of the wedge assembly provided in Embodiment 1 Figure 1 ;

[0021] Figure 2 Explosion of the wedge assembly provided in Embodiment 1 Figure 2 ;

[0022] Figure 3 This is a side view of the second wedge unit in the wedge assembly provided in Embodiment 1;

[0023] Figure 4 This is a schematic diagram of the structure of the decorative panel in the wedge assembly provided in Embodiment 1;

[0024] Figure 5 This is a schematic diagram of the structure of the microwave absorbing device provided in Embodiment 2.

[0025] 1-Shielding layer; 2-Reinforcing rib layer; 3-Keel layer; 4-Mounting plane layer; 5-Reflective surface layer; 6-First absorbing layer; 7-Wedge substrate layer; 70-Wedge substrate; 71-Second slot; 72-Wedge unit; 8-Second wedge unit layer; 80-Second wedge unit; 81-First wedge; 82-Second wedge; 83-Third wedge; 84-Fourth wedge; 85-First latch; 86-First slot; 87-Second latch; 88-Third latch; 9-Decorative panel layer; 90-Decorative panel; 91-Third slot; 92-Toothed protrusion structure. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] In the description of this utility model, the terms "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, 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.

[0029] Furthermore, in the description of this utility model, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0030] Example 1: As per the instruction manual Figure 1 and 2 As shown, the present invention provides a wedge assembly, including a wedge substrate 70, a first wedge unit 72 and a second wedge unit 80. The second wedge unit 80 includes a plurality of wedges, each of which is sequentially connected to the wedge substrate 70 in a circumferential direction and surrounds a cavity. The first wedge unit 72 is disposed on the wedge substrate 70 and located in the cavity.

[0031] In an optimized implementation, the number of first wedge units 72 is multiple, and these multiple first wedge units 72 are arranged in an array on the wedge substrate 70. Furthermore, the wedge substrate 70 is also provided with second wedge units 80 composed of multiple wedge plates, which increases the reflective area. Electromagnetic signals emitted from inside the electromagnetic compatibility testing laboratory to the wall or ceiling undergo multiple signal reflections, thus weakening the electromagnetic signal.

[0032] Optimized implementation methods, as shown in the appendix to the instruction manual. Figure 1 and 2The diagram shows a schematic of the wedge assembly. The second wedge unit 80 includes multiple wedges, each of which is sequentially distributed circumferentially on the wedge substrate 70. The angle between the surface of each wedge and the surface of the wedge substrate 70 is acute, and the middle of each pair of adjacent wedges is engaged. In this embodiment, the wedges are molded from expanded polystyrene foam, and the wedges are connected to the wedge substrate 70 to form a gradient impedance structure.

[0033] Specifically, the wedge substrate 70 is square, and a single second wedge unit 80 includes four wedges, respectively designated as the first wedge 81, the second wedge 82, the third wedge 83, and the fourth wedge 84. In this embodiment, all wedges are manufactured to the same specifications, which effectively reduces production costs and facilitates the production of spare parts. Of course, the four wedges of the same second wedge unit 80 can be manufactured to different specifications to meet different usage requirements. The wedges are connected to the wedge substrate 70 and adjacent wedges by snap-fit ​​connections, facilitating assembly and disassembly, as well as repair and replacement in case of damage. The first wedge 81 is connected to the upper part of the wedge substrate 70, the second wedge 82 is connected to the left part of the wedge substrate 70, the third wedge 83 is connected to the lower part of the wedge substrate 70, and the fourth wedge 84 is connected to the right part of the wedge substrate 70, with the wedges connected sequentially. The included angle between each wedge and the wedge substrate 70 is an acute angle, meaning each wedge is inclined inwards. The wedges sequentially enclose a cavity, which is conical with a larger cross-sectional area at one end near the wedge substrate 70 than at the other end. A portion of each wedge's surface is located outside the cavity. At the end furthest from the wedge substrate 70, the wedges are assembled to form a small square cavity, as shown in the attached specification. Figure 3 As shown.

[0034] In an optimized implementation, each of the wedges is a trapezoidal wedge, wherein the length of the bottom edge of the trapezoidal wedge near the wedge substrate 70 is greater than the length of the bottom edge of the other end.

[0035] In an optimized implementation, each wedge has a first latch 85 on its sidewall and a first slot 86 on its surface. The first slot 86 is adapted to the first latch 85 and is located on the side of the wedge away from the first latch 85. The first latch 85 on the wedge engages with the first slot 86 on the adjacent wedges. The four wedges of a single second wedge unit 80 are assembled to form a square pyramidal cavity, with the cross-sectional area near the wedge substrate 70 being larger than the cross-sectional area at the other end. Each wedge has a portion of its surface located outside the square pyramidal cavity, forming a wedge shape. The wedges are connected by a snap-fit ​​mechanism, which is simple to assemble and has good connection reliability. A single second wedge unit 80 can form multiple wedge shapes, resulting in excellent wave absorption and sound absorption effects.

[0036] In an optimized implementation, the wedge substrate 70 is provided with a second slot 71. A set of two second slots 71 are provided on the wedge substrate 70 corresponding to each wedge. In this embodiment, the wedge substrate 70 has eight second slots 71, with two slots on each side. The distance between the second slot 71 and the corresponding sidewall is the same. The ends of the first wedge 81, second wedge 82, third wedge 83, and fourth wedge 84 are each provided with two second latches 87, which engage with the corresponding second slots 71. Preferably, the second slot is a dovetail groove. The wedge substrate 70 and the wedges achieve a glue-free mechanical connection through the dovetail groove, avoiding the influence of adhesive on the wave absorption performance.

[0037] The optimized implementation also includes a decorative panel 90, which is disposed at the end of the wedges away from the wedge substrate 70. The decorative panel 90 has a mounting portion, and each of the wedges is connected to the mounting portion. The decorative panel 90 has weak wave absorption capability, allowing electromagnetic signals to pass through it and enter the square pyramidal cavity, thus weakening the signal.

[0038] Optimized implementation methods, as shown in the appendix to the instruction manual. Figure 4 As shown, the decorative panel 90 has a third slot 91 on its surface facing the second wedge unit 80. The decorative panel 90 has four third slots 91, each corresponding to a third latch 88 of one of the four wedges. Each wedge has a third latch 88 at its end facing the decorative panel 90. The third latch 88 includes multiple protrusions with gaps between adjacent protrusions. The protrusions can be inserted into the third slot 91 for a limiting effect.

[0039] Preferably, to improve the connection strength between the decorative panel and the wedge, the decorative panel 90 is glued to the wedge. In this embodiment, TDK special adhesive is used, and the adhesive is applied inside the third groove 91. The decorative panel 90 is connected using a flexible adhesive to adapt to the deformation requirements of the wedge assembly.

[0040] In an optimized implementation, the decorative panel 90 has toothed protrusions 92 on both surfaces to reduce noise. The decorative panel 90 is white, which effectively improves indoor brightness. The decorative panel 90 also serves as a surface decoration and protection unit.

[0041] In this embodiment, the wedges of the second wedge unit 80 are fixed together, between the wedges and the wedge substrate 70, and between the wedges and the decorative panel 90 by snap-fit. The base assembly is connected by non-reflective screws. The layered installation process allows each layer to be installed independently without interference, which can effectively shorten the construction period. It also supports single-layer replacement and maintenance, avoiding overall dismantling and reducing maintenance costs.

[0042] Example 2: As per the instruction manual Figure 5 As shown, this utility model also provides a microwave absorbing device, including multiple wedge components arranged in an array, wherein the wedge components are the wedge components described in Embodiment 1. The array of multiple wedge components forms a second microwave absorbing layer.

[0043] Preferably, it further includes a substrate component and a first absorbing layer 6. The first absorbing layer 6 and the second absorbing layer are sequentially disposed on the substrate component. The second absorbing layer includes a plurality of wedge components. The wedge components are the wedge components described in Embodiment 1. Each of the wedge components is arranged in an array on the first absorbing layer 6.

[0044] Preferably, the base assembly is further provided with a reflective surface layer 5.

[0045] Specifically, the composite absorbing structure is based on a base component, on which a reflective surface layer 5, a first absorbing layer 6, and a second absorbing layer are sequentially arranged. The size of the base component can be set according to requirements. The reflective surface layer 5 is laid flat on the base component, the first absorbing layer 6 is laid flat on the reflective surface layer 5, and several wedge components are arranged in an array on the first absorbing layer 6.

[0046] In an optimized implementation, the base assembly includes, from the inside out, a shielding layer 1, a reinforcing rib layer 2, a keel layer 3, and a mounting plane layer 4, with the reflective surface layer 5 disposed on the mounting plane layer 4. Here, "from the inside out" refers to the direction from the steel structure frame to the interior.

[0047] Preferably, the shielding layer 1 is made of steel plate and is fixed to the steel structure frame of the laboratory by connecting bolts, serving as the basic layer for electromagnetic shielding. In this embodiment, the shielding layer 1 is made of 1.5-2.5 mm thick metal-plated steel plate, and its length and width can be adjusted according to requirements.

[0048] Preferably, the reinforcing rib layer 2 comprises multiple angle steels, which are arranged sequentially at intervals along the first direction, with a rib spacing of 400-600 mm. The angle steels are connected to the shielding layer 1 by welding or high-strength bolts to enhance the overall structural strength. In this embodiment, the angle steel is preferably 100×100×10 mm galvanized angle steel.

[0049] Preferably, the keel layer 3 comprises multiple light steel keels, which are arranged sequentially at intervals along a second direction, perpendicular to the first direction. The light steel keels are connected to angle steel, and vibration-damping rubber pads are installed at the connection nodes to reduce the impact of vibration on the upper structure. In this embodiment, the light steel keels are arranged at 600 mm intervals, where the first direction refers to the vertical direction and the second direction refers to the horizontal direction. The composite support system of the reinforcing rib layer 2 and the keel layer 3 improves the overall structure's resistance to deformation by more than 40%.

[0050] Preferably, the mounting surface layer 4 is made of plywood, with a 3-5 mm expansion joint reserved between adjacent boards. The plywood is fixed to the light steel keel with self-tapping screws to form a flat mounting base. In this embodiment, the plywood is 10 mm thick eucalyptus core machine-spliced ​​double-laminated Okoume plywood.

[0051] Preferably, the reflective surface layer 5 includes a dielectric layer and a metal thin film layer. The dielectric layer is disposed on the mounting plane layer 4, and the metal thin film layer is disposed on the dielectric layer. In this embodiment, the dielectric layer is an epoxy resin-based dielectric layer with a preferred thickness of 2-4 mm, and the metal thin film layer has a preferred thickness of 0.2-0.5 mm. The reflective surface layer 5 can achieve electromagnetic wave reflection phase cancellation.

[0052] In an optimized implementation, the first absorbing layer 6 is a ferrite layer, comprising several ferrite sheets arranged in a checkerboard pattern on the reflective surface layer 5. The spacing between adjacent ferrite sheets is 0.5-1 mm. This checkerboard arrangement maximizes the magnetic loss surface area. The ferrite layer is connected to the mounting plane layer 4 by screws, providing mid-frequency magnetic loss. In this embodiment, the screws are preferably non-reflective screws.

[0053] Preferably, the ferrite sheet has a size of 100×100×5.5 mm.

[0054] In an optimized implementation, a second absorbing layer formed by several wedge components is provided on the first absorbing layer 6. To facilitate the assembly of the composite absorbing structure, a layered installation process is adopted, allowing each layer to be constructed independently without interference, thus improving construction efficiency and shortening the construction period. After the construction of the shielding layer 1, reinforcing rib layer 2, keel layer 3, mounting plane layer 4, reflective surface layer 5, and first absorbing layer 6 is completed, the second absorbing layer can be assembled in two ways. The first method is to assemble each wedge component and then place it on the first absorbing layer 6. The second method is to first arrange several wedge substrates 70 in an array on the first absorbing layer 6 to form a wedge substrate layer 7, then place each assembled second wedge unit 80 on the wedge substrate 70 one by one to form a second wedge unit layer 8, and finally assemble each decorative panel 90 on the second wedge unit 80 one by one to form a decorative panel layer 9.

[0055] Preferably, the wedge substrate 70 is fixed to the mounting plane layer 4 by screws penetrating the ferrite layer. In this embodiment, the wedge substrate 70 is preferably a expanded polystyrene substrate with dimensions of 600×600×50 mm. Multiple wedge substrates 70 are laid flat on the ferrite layer, and the second wedge unit 80 is mounted on the wedge substrate 70. The specific structure of the wedge assembly is described in Embodiment 1 and will not be repeated here.

[0056] Example 3: This utility model also provides an anechoic chamber, including side walls and a top plate, both of which are assembled using the composite absorbing structure described in Example 2.

[0057] The 10 m semi-anechoic chamber assembled using the above-mentioned composite absorbing structure was tested and found to have a voltage standing wave ratio (VSWR) ≤1.5 in the 1-40 GHz frequency band, fully meeting the requirements of CISPR 16-1-4 standard. The side walls and top plate of the anechoic chamber are installed as follows:

[0058] 1. Basic installation: Install shielding layer 1 on the steel structure frame, and fix shielding layer 1 with bolts;

[0059] 2. Reinforced structure: Galvanized angle steel reinforcing ribs are welded vertically along the shielding layer 1, with adjacent reinforcing ribs spaced apart;

[0060] 3. Vibration-damping keel: Install light steel keel on the reinforcing ribs, and add vibration-damping pads at the connection nodes. The vibration-damping pads can be made of neoprene rubber with a thickness of 5 mm.

[0061] 4. Base surface treatment: Lay plywood on the light steel keel, leaving expansion joints between adjacent plywood boards, and fix the plywood to the light steel keel with screws.

[0062] 5. Reflective surface layer construction: Apply the dielectric layer and metal film layer to the plywood;

[0063] 6. Construction of the first absorbing layer: Install ferrite sheets in a checkerboard pattern on the reflective surface layer 5. The ferrite sheets can be fixed to the plywood with screws.

[0064] 7. Installation of the second absorbing layer: After the screws at the bottom of the wedge substrate 70 penetrate the first absorbing layer, tighten them with a torque wrench, and then install the second wedge unit 80 on the wedge substrate 70.

[0065] 8. Installation of decorative panel layer: Apply adhesive evenly with a scraper and then stick the decorative panel. The decorative panel is clipped onto the second wedge unit 80. The construction is completed after curing.

[0066] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0067] Those skilled in the art will understand that this invention can be implemented in many other specific forms without departing from its spirit and scope. Although embodiments of this invention have been described, it should be understood that this invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of this invention as defined in the appended claims.

Claims

1. A wedge assembly comprising a wedge substrate, characterized by, It also includes a first wedge unit and a second wedge unit. The second wedge unit includes a plurality of wedges, each of which is sequentially connected to the wedge substrate in a circumferential direction and surrounds a cavity. The first wedge unit is disposed on the wedge substrate and located within the cavity.

2. The wedge assembly of claim 1, wherein The number of the first wedge units is multiple, and the multiple first wedge units are arranged in an array on the wedge substrate.

3. The wedge assembly of claim 1, wherein The angle between the surface of each wedge and the surface of the wedge substrate is an acute angle. The cavity is conical and the cross-sectional area of ​​one end near the wedge substrate is larger than the cross-sectional area of ​​the other end. A portion of the surface of each wedge is located outside the cavity.

4. The wedge assembly of claim 1, wherein, Each of the wedges has a first latch on its sidewall and a first slot on its surface. The first latch on the wedge engages with the first slot on the adjacent wedges.

5. The wedge assembly of claim 1, wherein, The mounting area of ​​the wedge substrate is provided with a plurality of second slots, and each wedge has a second latch at one end near the wedge substrate, and each second latch is engaged with a second slot in a one-to-one manner.

6. The wedge assembly of claim 1, wherein, It also includes a decorative panel, which is disposed at the end of the wedge away from the wedge substrate, and the decorative panel is provided with a mounting part, on which each of the wedges is connected.

7. The wedge assembly of claim 6, wherein, The mounting part of the decorative panel is provided with a plurality of third slots, and each of the wedges is provided with a third tongue at the end facing the decorative panel, and each of the third tongues is engaged with each of the third slots in a one-to-one manner.

8. The wedge assembly of claim 6, wherein, The decorative panel is glued and fixed to each of the wedges.

9. A wave-absorbing device comprising a plurality of wedge components, the plurality of wedge components being distributed in an array, characterized in that, The wedge assembly is the wedge assembly according to any one of claims 1-8.

10. The wave-absorbing device according to claim 9, wherein It also includes a substrate assembly and a first absorbing layer, wherein the first absorbing layer is disposed on the substrate assembly and each of the wedge assemblies is disposed on the first absorbing layer.

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