Multi-band electromagnetic wave absorption structure

Abstract

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

Description

Technical Field

[0001] The 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 equipment and aerospace systems has made electromagnetic interference an increasingly prominent problem, especially in the frequency range of 2-18GHz, where frequent electromagnetic wave radiation poses a threat to the normal operation of electronic equipment and information transmission. In the prior art, electromagnetic wave absorbing materials are usually made of metal or carbon-based materials, but these materials are usually thick and heavy, with fixed structures, and cannot meet the electromagnetic wave absorption requirements of 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 object, 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 bottom 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 extend and retract 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 matched via a guiding mechanism, and the honeycomb layers located at both ends are respectively connected to the bottom plate and the protective layer.

[0010] Optionally, the guiding mechanism comprises a connecting plate, the connecting plate is connected to any one of the honeycomb layers, a slide groove is provided on the connecting plate, a slider is slidably fitted in the slide groove, and 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 the air pump is connected with 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-transmitting layer connected to the telescopic frequency modulation mechanism and the pneumatic adjustment mechanism.

[0023] Optionally, the protective layer further includes a deicing 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 deform the telescopic frequency modulation mechanism, 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 drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

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

[0030] Figure 2 It is a structural schematic diagram of the telescopic frequency modulation mechanism of the present invention;

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

[0032] In the figure: 1. bottom 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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 Figure 1-Figure 3 The present invention provides a multi-band electromagnetic wave absorbing structure, comprising:

[0036] Bottom plate 1;

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

[0038] The protective layer is connected to the telescopic frequency modulation mechanism 2 and the end of 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 telescope 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 to cause the telescopic frequency modulation mechanism 2 to deform, so that the telescopic frequency modulation mechanism 2 can 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, and two adjacent honeycomb layers 21 are slidably matched through a guide mechanism. The honeycomb layers 21 at both ends are respectively connected to the bottom plate 1 and the protective layer.

[0043] The multi-layer honeycomb layer 21 is composed of a plurality of hexagonal or other geometrically shaped cells, and the geometry of each layer can be adjusted according to design requirements, such as cell size, thickness and number of layers. The honeycomb structure is printed layer by layer with a lightweight material (such as carbon fiber composite material or resin material) through FDM (fused deposition modeling) technology, and each layer of honeycomb layer 21 is parallel to each other in the vertical direction to form a stable structural frame.

[0044] In one embodiment of the present invention, the guide mechanism includes a connecting plate 22 connected to any honeycomb layer 21 , a slide groove is provided on the connecting plate 22 , a slider is slidably fitted in the slide groove, and the slider is connected to another honeycomb layer 21 .

[0045] The connecting plate 22, the slide groove and the slider can make two adjacent honeycomb layers 21 form a sliding fit. When the slider slides to the end in the slide groove, it pulls the next honeycomb layer 21 to move, so that the multi-layer honeycomb layers 21 form a fishing rod telescopic structure.

[0046] In one embodiment of the present invention, the pneumatic adjustment mechanism 3 is an accordion-type airbag.

[0047] The accordion-type airbag is located inside the multi-layer honeycomb layer 21 or wrapped outside. The inflation of the accordion-type airbag pushes the protective layer, causing the multi-layer honeycomb layer 21 to deform, and can achieve efficient absorption in the wide-band electromagnetic wave range (2-18GHz). Its multi-layer design combined with the accordion-type airbag also enhances the impact resistance of the structure, can disperse external impact force, and make the overall structure have good mechanical bearing performance.

[0048] The accordion-type airbag is made of flexible material and has a wave-like folded shape, similar to the pleated structure of an accordion. The airbag has a variable pressure air cavity inside, and air is injected or discharged through an external air pump.

[0049] In one embodiment of the present invention, it also includes:

[0050] Foundation 4;

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

[0052] In one embodiment of the present invention, the gas path mechanism comprises:

[0053] A pipeline 6, one end of which is connected to the air pump 5;

[0054] A one-way valve 7 is provided on the pipeline 6;

[0055] A first connector 8 is connected to an end of the pipeline 6 away from the air pump 5;

[0056] A relief valve 9 connected to the first connector 8;

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

[0058] The air pump 5 is a standard electric or manual air pump, which is used to provide an air pressure source for the accordion-type airbag. The air pump 5 is connected to the air inlet of the accordion-type airbag, and realizes its expansion and contraction by controlling the inflation and exhaust of the accordion-type airbag.

[0059] The one-way valve 7 prevents the gas from flowing back.

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

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

[0062] In one embodiment of the present invention, the protective layer includes a wave-transmitting layer 11 connected to the telescopic frequency modulation mechanism 2 and the pneumatic adjustment mechanism 3 .

[0063] The wave-transmitting layer 11 is a thin film made of glass fiber or quartz fiber material, which has light transmittance and wave transmittance, and can ensure the penetration of electromagnetic waves and prevent the external environment from directly damaging the honeycomb layer 21. The thickness and surface characteristics of the wave-transmitting layer 11 are adjusted according to application requirements to ensure the penetration of electromagnetic waves without affecting the wave absorbing function of the honeycomb layer 21.

[0064] In one embodiment of the present invention, the protective layer further includes a deicing layer 12 , which is disposed on the end surface of the wave-transmitting layer 11 away from the bottom plate 1 .

[0065] The de-icing layer 12 is coated with a PDMS coating, which is a silicone rubber material that can be sprayed or cast. It is tightly attached to the wave-transmitting layer by spraying or casting. Its main function is to prevent condensation and freezing of moisture in the external environment, especially under low temperature conditions, to prevent the formation of ice layers. It also has a certain absorption and mitigation effect on external physical impacts.

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

[0067] In one embodiment of the present invention, there are multiple receiving units.

[0068] The present invention can be used in key parts such as aircraft fuselage, wings, and radome to absorb electromagnetic waves from different frequency bands and reduce electromagnetic interference. At the same time, the accordion airbag and deicing layer 12 can prevent external impact and ice formation in low temperature environments when flying at high altitudes, ensuring the structural integrity and flight safety of the aircraft. The anti-impact and electromagnetic wave absorption functions are particularly valuable for the design of stealth aircraft and drones.

[0069] The invention can be applied to military vehicles and equipment, such as the outer cover of radar systems, the housing of electronic equipment, and protective armor. Through its broadband electromagnetic wave absorption function, it can reduce the possibility of being detected by enemy radar and enhance stealth capabilities. In addition, the impact-resistant structure can be used on the surface of armor or vehicles to provide an additional layer of protection to absorb explosion shock 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 and protecting the remote control signal of the wind turbine from interference. In addition, the anti-shock function helps reduce damage to the wind turbine in bad weather (such as strong winds or hail).

[0071] The present invention can be used for electromagnetic shielding to prevent electromagnetic interference between on-board electronic devices and ensure the stable operation of autonomous driving sensors, radars and communication systems. At the same time, the anti-impact function can provide additional protection for the vehicle body and reduce the risk of damage to the vehicle in traffic accidents. In addition, the deicing layer 12 can be applied to the windows and body of the vehicle to prevent ice formation in low temperature environments.

[0072] The present invention can be used in electronic equipment housings, 5G communication base stations, radar stations and other equipment that require electromagnetic wave shielding. Through the adaptive adjustment structure, it ensures effective absorption of electromagnetic waves in a wide frequency band to avoid electromagnetic interference. In addition, the deicing layer 12 can be used for outdoor base station equipment to prevent ice accumulation in cold or harsh environments and ensure the normal operation of communication equipment.

[0073] The present invention is applied to the exterior wall or window structure of a smart building to effectively absorb external electromagnetic waves, reduce electromagnetic interference of indoor equipment, and improve the stability of indoor signals. At the same time, in cold regions, the deicing layer 12 can be used on the surface of buildings, bridges, transmission lines or antennas to prevent equipment failure or structural damage caused by ice accumulation.

[0074] The present invention can be applied to the body structure of high-speed trains to provide electromagnetic wave absorption function to prevent the train from interfering with external signals during high-speed travel. The impact resistance of the accordion airbag helps to improve the anti-collision performance of the train and enhance safety. The deicing layer 12 can also be used on the surface of the train, tracks and power equipment to prevent ice from forming under low temperature conditions.

[0075] The present invention can be used for the shell, antenna and sensor module of the drone to provide electromagnetic wave shielding and anti-impact protection, improve the anti-interference ability of the drone in a complex electromagnetic environment, and enhance its adaptability to environmental impact. The anti-icing function of the deicing layer 12 is particularly important for drones performing missions in cold areas or polar environments, and can ensure their normal operation in low temperature environments.

[0076] In satellites and spacecraft, the present invention 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 spacecraft avoid surface freezing in extremely low temperature space environment, thereby ensuring the smooth progress of space missions.

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

[0078] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0079] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

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 telescope along the first direction, thereby changing the length of the telescopic frequency modulation mechanism (2).

2. The multi-band electromagnetic wave absorption structure according to claim 1, characterized in that: The telescopic frequency modulation mechanism (2) comprises a plurality of honeycomb layers (21), two adjacent honeycomb layers (21) are slidably matched via a guide mechanism, and the honeycomb layers (21) located at both ends are respectively connected to the bottom plate (1) and the protective layer.

3. The multi-band electromagnetic wave absorption structure according to claim 2, 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 sliding block being slidably fitted in the sliding groove, and the sliding block being connected to another of the honeycomb layers (21).

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

5. The multi-band electromagnetic wave absorption 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.

6. The multi-band electromagnetic wave absorption structure according to claim 5, 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) 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).

7. The multi-band electromagnetic wave absorption structure according to claim 2, characterized in that: The honeycomb layer (21) is a hollow structure, and multiple layers of the honeycomb layers (21) are nested.

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

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

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

Images