A multi-band electromagnetic wave absorbing structure

Abstract

The application relates to the technical field of electromagnetic wave absorption, and discloses a multi-frequency-band electromagnetic wave absorption structure which comprises a bottom plate; a receiving unit which comprises a telescopic frequency adjusting mechanism and a pneumatic adjusting mechanism connected with the bottom plate; a protective layer connected with one end of the telescopic frequency adjusting mechanism and the pneumatic adjusting mechanism away from the bottom plate; wherein the pneumatic adjusting mechanism can push the protective layer to move in a first direction, so that the protective layer drives the telescopic frequency adjusting mechanism to telescope in the first direction, and the length of the telescopic frequency adjusting mechanism is changed; and the application can adapt to electromagnetic wave absorption requirements of different frequency bands.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic wave absorption, and in particular to a multi-band electromagnetic wave absorption structure. Background Art

[0002] The widespread use of modern electronic devices and aerospace systems has led to an increasingly prominent problem of electromagnetic interference. Frequent electromagnetic radiation in the 2-18 GHz frequency range, in particular, poses a threat to the normal operation of electronic devices and information transmission. Existing electromagnetic wave absorbing materials are typically made of metal or carbon-based materials. However, these materials are often heavy and rigid in structure, making them inadequate for absorbing electromagnetic waves across different frequency bands. Summary of the Invention

[0003] The object of the present invention is to provide a multi-band electromagnetic wave absorbing structure, aiming to solve or improve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a multi-band electromagnetic wave absorbing structure, comprising:

[0005] base plate;

[0006] A receiving unit, comprising a telescopic frequency modulation mechanism and a pneumatic adjustment mechanism connected to the base plate;

[0007] A protective layer connected to the telescopic frequency modulation mechanism and an end of the pneumatic adjustment mechanism away from the bottom plate;

[0008] The pneumatic adjustment mechanism can push the protective layer to move along the first direction, so that the protective layer drives the telescopic frequency modulation mechanism to expand and contract along the first direction, thereby changing the length of the telescopic frequency modulation mechanism itself.

[0009] Optionally, the telescopic frequency modulation mechanism includes multiple honeycomb layers, and two adjacent honeycomb layers are slidably fitted together via a guide mechanism, and the honeycomb layers at both ends are respectively connected to the bottom plate and the protective layer.

[0010] Optionally, the guide mechanism includes a connecting plate, which is connected to any one of the honeycomb layers. A sliding groove is provided on the connecting plate, and a slider is slidably fitted in the sliding groove. The slider is connected to another honeycomb layer.

[0011] Optionally, the pneumatic adjustment mechanism is an accordion-type airbag.

[0012] Optionally, also include:

[0013] foundation;

[0014] An air pump is arranged on the foundation and is connected to the pneumatic regulating mechanism through an air path mechanism.

[0015] Optionally, the gas circuit mechanism includes:

[0016] a pipeline, one end of which is connected to the air pump;

[0017] a one-way valve, arranged on the pipeline;

[0018] a first connector connected to an end of the pipeline away from the air pump;

[0019] a relief valve connected to the first connector;

[0020] The second joint is connected to the first joint, and the second joint is connected to the pneumatic adjustment mechanism.

[0021] Optionally, the honeycomb layer is a hollow structure, and multiple layers of the honeycomb layers are nested.

[0022] Optionally, the protective layer includes a wave-transparent layer connected to the telescopic frequency modulation mechanism and the pneumatic adjustment mechanism.

[0023] Optionally, the protective layer further includes a de-icing layer, which is arranged on the end surface of the wave-transmitting layer away from the bottom plate.

[0024] Optionally, there are multiple receiving units.

[0025] The present invention discloses the following technical effects:

[0026] 1. The protective layer is pushed to move by the pneumatic adjustment mechanism to cause the telescopic frequency modulation mechanism to deform, so that the telescopic frequency modulation mechanism can adapt to the electromagnetic wave absorption requirements of different frequency bands.

[0027] 2. When an external impact occurs, the pneumatic adjustment mechanism absorbs part of the impact energy, and the telescopic frequency modulation mechanism disperses the remaining impact force, providing additional anti-impact protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0029] Fig. 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Fig. 2 This is a structural diagram of the telescopic frequency modulation mechanism of the present invention;

[0031] Fig. 3 It is a schematic structural diagram of the pneumatic adjustment mechanism of the present invention.

[0032] In the figure: 1. Base plate; 2. Telescopic frequency modulation mechanism; 21. Honeycomb layer; 22. Connecting plate; 3. Pneumatic adjustment mechanism; 4. Foundation; 5. Air pump; 6. Pipeline; 7. One-way valve; 8. First joint; 9. Overflow valve; 10. Second joint; 11. Wave-transmitting layer; 12. De-icing layer. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Reference Figs. 1-3 The present invention provides a multi-band electromagnetic wave absorbing structure, comprising:

[0036] Base plate 1;

[0037] The receiving unit includes a telescopic frequency modulation mechanism 2 and a pneumatic adjustment mechanism 3 connected to the base plate 1;

[0038] The protective layer is connected to the end of the telescopic frequency modulation mechanism 2 and the pneumatic adjustment mechanism 3 away from the bottom plate 1;

[0039] The pneumatic adjustment mechanism 3 can push the protective layer to move along the first direction, so that the protective layer drives the telescopic frequency modulation mechanism 2 to expand and contract along the first direction, thereby changing the length of the telescopic frequency modulation mechanism 2 itself.

[0040] The protective layer is pushed to move by the pneumatic adjustment mechanism 3 so that the telescopic frequency modulation mechanism 2 is deformed, thereby enabling the telescopic frequency modulation mechanism 2 to adapt to the electromagnetic wave absorption requirements of different frequency bands.

[0041] When an external impact occurs, the pneumatic adjustment mechanism 3 absorbs part of the impact energy, and the telescopic frequency modulation mechanism 2 disperses the remaining impact force, providing additional anti-impact protection.

[0042] In one embodiment of the present invention, the telescopic frequency modulation mechanism 2 includes multiple honeycomb layers 21. Two adjacent honeycomb layers 21 are slidably fitted together through a guide mechanism. The honeycomb layers 21 at both ends are connected to the bottom plate 1 and the protective layer respectively.

[0043] The multi-layer honeycomb layer 21 is composed of a plurality of hexagonal or other geometric cells, and the geometric shape of each layer can be adjusted according to design requirements, such as cell size, thickness, and layer number. The honeycomb structure is printed layer by layer by FDM (Fused Deposition Modeling) technology with lightweight materials such as carbon fiber composite materials or resin materials. Each honeycomb layer 21 is parallel to each other in the vertical direction, forming a stable structural frame.

[0044] In an embodiment of the present application, the guide mechanism includes a connecting plate 22 connected to any honeycomb layer 21, and a sliding groove is formed on the connecting plate 22, and a sliding block is slidingly fitted in the sliding groove, and the sliding block is connected to another honeycomb layer 21.

[0045] The connecting plate 22, the sliding groove, and the sliding block can make the adjacent two honeycomb layers 21 form a sliding fit. When the sliding block slides to the end of the sliding groove, the next honeycomb layer 21 is pulled to move, so that the multi-layer honeycomb layer 21 forms a telescopic structure like a fishing rod.

[0046] In an embodiment of the present application, the pneumatic adjusting mechanism 3 is an accordion air bag.

[0047] The accordion air bag is located inside or wrapped outside the multi-layer honeycomb layer 21. The accordion air bag is inflated and expanded to push the protective layer, so that the multi-layer honeycomb layer 21 deforms, and can achieve high-efficiency absorption in the wideband electromagnetic wave (2-18 GHz) range. The multi-layer design cooperates with the accordion air bag to further enhance the impact resistance of the structure, can disperse external impact force, and make the overall structure have good mechanical bearing performance.

[0048] The accordion air bag is made of flexible material and has a wave-shaped folded shape, similar to the pleated structure of an organ. The air bag has a variable pressure air cavity inside, which can be filled or discharged by an external air pump.

[0049] In an embodiment of the present application, it further includes:

[0050] The foundation 4;

[0051] The air pump 5 is arranged on the foundation 4, and the air pump 5 is connected with the pneumatic adjusting mechanism through the air path mechanism.

[0052] In an embodiment of the present application, the air path mechanism includes:

[0053] The pipeline 6 is connected with the air pump 5 at one end;

[0054] The one-way valve 7 is arranged on the pipeline 6;

[0055] The first joint 8 is connected with the end of the pipeline 6 away from the air pump 5;

[0056] The overflow valve 9 is connected with the first joint 8.

[0057] The second joint 10 is connected to the first joint 8, and the second joint 10 is connected to the pneumatic adjusting mechanism 3.

[0058] The air pump 5 is a standard electric or manual air pump for providing an air pressure source for the accordion air bag. The air pump 5 is connected to the air inlet of the accordion air bag and realizes the expansion and contraction of the accordion air bag by controlling the inflation and deflation of the accordion air bag.

[0059] The one-way valve 7 prevents backflow of gas.

[0060] The overflow valve 9 is a safety valve for releasing excess air pressure to prevent the internal pressure of the accordion air bag from being too high.

[0061] In an embodiment of the present application, the honeycomb layer 21 is a hollow structure, and the multiple honeycomb layers 21 are nested.

[0062] In an embodiment of the present application, the protective layer includes a wave-transparent layer 11 connected to the telescopic frequency modulation mechanism 2 and the pneumatic adjusting mechanism 3.

[0063] The wave-transparent layer 11 is a film made of glass fiber or quartz fiber material, which has light-transmitting and wave-transmitting properties, can ensure electromagnetic wave penetration, and can prevent direct damage to the honeycomb layer 21 by the external environment. The thickness and surface properties of the wave-transparent layer 11 are adjusted according to application requirements to ensure electromagnetic wave penetration without affecting the wave-absorbing function of the honeycomb layer 21.

[0064] In an embodiment of the present application, the protective layer further includes a deicing layer 12 arranged on the end surface of the wave-transparent layer 11 away from the base plate 1.

[0065] The deicing layer 12 is coated with a PDMS coating, which is a sprayable or castable silicone rubber material that is tightly attached to the wave-transparent layer by spraying or casting. The main function of the deicing layer 12 is to prevent condensation and icing of water in the external environment, especially in low-temperature conditions, to prevent the formation of an ice layer, and to absorb and alleviate the physical impact from the external environment.

[0066] Compared with traditional electric heating or chemical deicing technology, the deicing layer 12 of the present application provides a low-energy and environmentally friendly deicing method, which not only ensures that the electromagnetic wave absorption performance is not affected, but also solves the problem of ice accumulation in extremely cold environments, greatly reducing the energy consumption and maintenance cost of the deicing process.

[0067] In an embodiment of the present application, the receiving unit is multiple.

[0068] This invention can be used in key areas such as the aircraft fuselage, wings, and radome to absorb electromagnetic waves from different frequency bands and reduce electromagnetic interference. Furthermore, the accordion-style airbags and de-icing layer 12 protect against external impacts and ice formation in low-temperature environments during high-altitude flight, ensuring the aircraft's structural integrity and flight safety. These impact-resistant and electromagnetic wave-absorbing features are particularly valuable in the design of stealth aircraft and drones.

[0069] This invention can be applied to military vehicles and equipment, such as radar system housings, electronic equipment casings, and protective armor. Its broadband electromagnetic wave absorption capability reduces detection by enemy radar and enhances stealth capabilities. Furthermore, the impact-resistant structure can be applied to armor or vehicle surfaces, providing an additional layer of protection against blast waves or other external impacts.

[0070] The invention can be applied to the surface of wind turbine blades to prevent blade icing while ensuring electromagnetic wave penetration, protecting the wind turbine's remote control signals from interference. Furthermore, the impact resistance function helps reduce damage to the wind turbine in severe weather (such as strong winds or hail).

[0071] This invention can be used for electromagnetic shielding, preventing electromagnetic interference between onboard electronic devices and ensuring the stable operation of autonomous driving sensors, radar, and communication systems. Furthermore, its impact resistance provides additional protection for the vehicle body, reducing the risk of damage in traffic accidents. Furthermore, the de-icing layer 12 can be applied to vehicle windows and bodies to prevent ice formation in low-temperature environments.

[0072] The present invention can be used in equipment requiring electromagnetic wave shielding, such as electronic device casings, 5G communication base stations, and radar stations. Through its adaptively adjustable structure, it effectively absorbs electromagnetic waves across a wide frequency band, preventing electromagnetic interference. Furthermore, the de-icing layer 12 can be used in outdoor base station equipment to prevent ice accumulation in cold or harsh environments, ensuring the normal operation of communication equipment.

[0073] Applying the present invention to the exterior walls or windows of intelligent buildings can effectively absorb external electromagnetic waves, reduce electromagnetic interference from indoor equipment, and improve indoor signal stability. Furthermore, in cold regions, the deicing layer 12 can be applied to building surfaces, bridges, power lines, or antennas to prevent equipment failure or structural damage caused by ice accumulation.

[0074] This invention can be applied to the body structure of high-speed trains, providing electromagnetic wave absorption to prevent interference with external signals during high-speed travel. The impact resistance of the accordion-style airbags helps improve the train's crash resistance and enhance safety. The deicing layer 12 can also be applied to train surfaces, tracks, and electrical equipment to prevent ice formation in low-temperature conditions.

[0075] The present application can be used for the shell, antenna and sensor module of the unmanned aerial vehicle, provides electromagnetic wave shielding and impact protection, improves the anti-interference ability of the unmanned aerial vehicle in complex electromagnetic environment, and enhances its adaptability to environmental impact. The deicing function of the deicing layer 12 is particularly important for the unmanned aerial vehicle performing tasks in cold regions or polar environments, which can ensure its normal operation in low temperature environment.

[0076] In satellites and spacecraft, the present application can be used for electromagnetic wave absorption and impact protection of external structures, reduce electromagnetic interference of satellites in space, and ensure the stability of signal transmission. At the same time, the deicing layer 12 can help the spacecraft avoid surface freezing in extremely low temperature space environment, so as to ensure the smooth progress of space mission.

[0077] The present application can be used for the shell of smart home devices or Internet of Things terminal devices, prevent electromagnetic interference between devices through broadband electromagnetic wave absorption function, and improve its working stability. The impact-resistant structure can provide physical protection for these devices and prolong their service life.

[0078] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present application.

[0079] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A multi-band electromagnetic wave absorbing structure, characterized in that: include: Bottom plate (1); A receiving unit comprising a telescopic frequency modulation mechanism (2) and a pneumatic adjustment mechanism (3) connected to the base plate (1); A protective layer connected to the telescopic frequency modulation mechanism (2) and the end of the pneumatic adjustment mechanism (3) away from the bottom plate (1); The pneumatic adjustment mechanism (3) is capable of pushing the protective layer to move along a first direction, so that the protective layer drives the telescopic frequency modulation mechanism (2) to expand and contract along the first direction, thereby changing the length of the telescopic frequency modulation mechanism (2); The telescopic frequency modulation mechanism (2) comprises multiple honeycomb layers (21), two adjacent honeycomb layers (21) are slidably matched via a guide mechanism, and the honeycomb layers (21) at both ends are respectively connected to the bottom plate (1) and the protective layer.

2. The multi-band electromagnetic wave absorbing structure according to claim 1, characterized in that: The guide mechanism comprises a connecting plate (22), the connecting plate (22) being connected to any one of the honeycomb layers (21), a sliding groove being provided on the connecting plate (22), a slider being slidably fitted in the sliding groove, and the slider being connected to another honeycomb layer (21).

3. The multi-band electromagnetic wave absorbing structure according to claim 1, characterized in that: The pneumatic adjustment mechanism (3) is an accordion-type airbag.

4. The multi-band electromagnetic wave absorbing structure according to claim 1, characterized in that: Also includes: foundation (4); An air pump (5) is arranged on the foundation (4), and the air pump (5) is connected to the pneumatic regulating mechanism via an air path mechanism.

5. The multi-band electromagnetic wave absorbing structure according to claim 4, characterized in that: The gas path mechanism comprises: A pipeline (6), one end of which is connected to the air pump (5); a one-way valve (7), arranged on the pipeline (6); A first connector (8) is connected to an end of the pipeline (6) away from the air pump (5); A relief valve (9) connected to the first connector (8); The second joint (10) is connected to the first joint (8), and the second joint (10) is connected to the pneumatic adjustment mechanism (3).

6. The multi-band electromagnetic wave absorbing structure according to claim 1, characterized in that: The honeycomb layer (21) is a hollow structure, and multiple layers of the honeycomb layers (21) are nested.

7. The multi-band electromagnetic wave absorbing structure according to claim 1, characterized in that: The protective layer comprises a wave-transmitting layer (11), which is connected to the telescopic frequency modulation mechanism (2) and the pneumatic adjustment mechanism (3).

8. The multi-band electromagnetic wave absorbing structure according to claim 7, characterized in that: The protective layer further comprises a deicing layer (12) which is arranged on the end surface of the wave-transmitting layer (11) away from the bottom plate (1).

9. The multi-band electromagnetic wave absorbing structure according to claim 1, characterized in that: There are multiple receiving units.

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