CN219055609U - Stealth device for unmanned aerial vehicle - Google Patents
Stealth device for unmanned aerial vehicle Download PDFInfo
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- CN219055609U CN219055609U CN202221315426.2U CN202221315426U CN219055609U CN 219055609 U CN219055609 U CN 219055609U CN 202221315426 U CN202221315426 U CN 202221315426U CN 219055609 U CN219055609 U CN 219055609U
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- 238000002679 ablation Methods 0.000 claims abstract description 16
- 239000006260 foam Substances 0.000 claims abstract description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 12
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 38
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 36
- 239000004964 aerogel Substances 0.000 claims description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 21
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 12
- 239000011148 porous material Substances 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 5
- 238000005229 chemical vapour deposition Methods 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract 1
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- 230000008569 process Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
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- 239000002103 nanocoating Substances 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- DGXAGETVRDOQFP-UHFFFAOYSA-N 2,6-dihydroxybenzaldehyde Chemical compound OC1=CC=CC(O)=C1C=O DGXAGETVRDOQFP-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- DWAWYEUJUWLESO-UHFFFAOYSA-N trichloromethylsilane Chemical compound [SiH3]C(Cl)(Cl)Cl DWAWYEUJUWLESO-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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Abstract
The application discloses stealth device for unmanned aerial vehicle, including aluminum alloy base plate, aluminum alloy base plate's exposure face is provided with thermal-insulated wave-absorbing layer, thermal-insulated wave-absorbing layer is porous foam structure, thermal-insulated wave-absorbing layer's exposure face is provided with the enhancement layer, the exposure face of enhancement layer is provided with the ablation resistant layer. The application is simple and practical, through porous foam structure, extension heat transmission way has promoted the reflection absorption of electromagnetic wave simultaneously, realizes unmanned aerial vehicle's stealthy.
Description
Technical Field
The application relates to the technical field of composite materials, in particular to a stealth device for an unmanned aerial vehicle.
Background
Unmanned aerial vehicles, abbreviated as "unmanned aerial vehicles", abbreviated as "UAVs", are unmanned aerial vehicles that are operated by means of radio remote control devices and self-contained programmed control devices, or are operated autonomously, either entirely or intermittently, by an onboard computer. Unmanned aerial vehicles can be classified into military and civil according to application fields; in the aspect of military use, unmanned aerial vehicle is divided into a reconnaissance plane and a target plane, along with the development of wireless detection technology and ultra-high speed accurate guided weapon, unmanned aerial vehicle urgent need have excellent electromagnetic wave stealth characteristic, compare with surface coating material, high temperature structure formula heat insulation wave absorbing material collects and bears, resistance to compression, heat protection, wave absorbing in an organic whole, not only can alleviate unmanned aerial vehicle dead weight, but also structural designability is strong, can realize infrared and radar dual stealth.
At present, heat-insulating wave-absorbing materials are various in types, but few in application to key parts such as a stealth unmanned aerial vehicle wing front edge or a missile tail nozzle with service temperature reaching 700 ℃ or even more than 1000 ℃, and in view of requirements on high-temperature oxidation resistance and ablation resistance, research on carbon materials, silicon carbide materials and composite structures thereof in the field of high-temperature heat-insulating wave-absorbing is mainly carried out at home and abroad. However, the conductivity of the carbon material is greatly changed, the impedance matching degree with free space is not high, the incidence of surface electromagnetic waves is difficult to realize, the absorption of the surface electromagnetic waves to the electromagnetic waves is weak, and the structural stability of the carbon material is poor under a high-temperature aerobic environment. The silicon carbide material has excellent performances of chemical stability, high strength, corrosion resistance, oxidation resistance and the like, but the pure silicon carbide material has lower electrical conductivity, mainly has single polarization, has poorer electromagnetic wave absorption capability when being singly used, and has higher thermal conductivity and is generally used as a heat conducting material. Accordingly, improvements are needed.
Disclosure of Invention
The utility model aims to provide a stealth device for an unmanned aerial vehicle, which aims to overcome the defects in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the embodiment of the application discloses stealth device for unmanned aerial vehicle, including aluminum alloy base plate, aluminum alloy base plate's exposure face is provided with thermal-insulated wave-absorbing layer, thermal-insulated wave-absorbing layer is porous foam structure, thermal-insulated wave-absorbing layer's exposure face is provided with the enhancement layer, the exposure face of enhancement layer is provided with the ablation resistant layer.
Further, in the stealth device for the unmanned aerial vehicle, the heat insulation wave-absorbing layer comprises a carbon foam substrate and aerogel particles filled in pores of the carbon foam substrate, wherein the pore diameter of the carbon foam substrate is 20-40 μm.
Further, in the stealth device for an unmanned aerial vehicle, the skeleton surface of the carbon foam substrate is provided with the reinforcing coating by chemical vapor deposition.
Further, in the stealth device for the unmanned aerial vehicle, the strengthening coating is a silicon carbide coating, and the thickness of the strengthening coating is 1-3 μm.
Further, in the stealth device for an unmanned aerial vehicle, the aerogel particles are silicon carbide aerogel particles, the pore diameter is 1-30nm, the porosity is 80-90%, and the specific surface area of the filling is 1000-1400m 2 /g。
Further, in the stealth device for the unmanned aerial vehicle, the thickness of the aluminum alloy base plate is 1-2mm.
Further, in the stealth device for the unmanned aerial vehicle, the thickness of the heat insulation wave-absorbing layer is 4-8mm.
Further, in the stealth device for the unmanned aerial vehicle, the reinforcing layer is a carbon fiber reinforced resin matrix composite skin, and the thickness of the reinforcing layer is 2-4mm.
Further, in the stealth device for the unmanned aerial vehicle, the ablation-resistant layer is a carbon fiber reinforced phenolic carbon ablation-resistant coating, and the thickness of the ablation-resistant layer is 20-50 μm.
Compared with the prior art, the utility model has the advantages that: the stealth device for the unmanned aerial vehicle is simple in structure, the silicon carbide coating is arranged on the surface of the skeleton of the carbon foam substrate, the mechanical property of the carbon foam substrate is obviously improved, as the reinforced skeleton of aerogel particles, the silicon carbide aerogel particles with low thermal conductivity can obviously reduce the thermal conductivity of the device, and the silicon carbide aerogel particles have a nano-pore structure, so that the device has excellent properties of low density, low thermal conductivity and the like; meanwhile, under the action of an electromagnetic field, the crystal phase of the silicon carbide forms polarization relaxation, so that the back and forth reflection, absorption and dissipation of electromagnetic waves in the device are promoted, and the dissipation and absorption of the electromagnetic waves are further increased.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a stealth device for a drone according to an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of a heat insulating and absorbing layer according to an embodiment of the utility model.
Detailed Description
The following detailed description of the technical solutions according to the embodiments of the present utility model will be given with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 and 2, a stealth device for an unmanned aerial vehicle comprises an aluminum alloy base plate 1, wherein an exposed surface of the aluminum alloy base plate 1 is provided with a heat insulation wave-absorbing layer 2, the heat insulation wave-absorbing layer 2 is of a porous foam structure, the exposed surface of the heat insulation wave-absorbing layer 2 is provided with a reinforcing layer 3, and the exposed surface of the reinforcing layer 3 is provided with an ablation-resistant layer 4.
According to the technical scheme, the exposed surface is the side surface close to the outside air, the device is directly used as a shell of the unmanned aerial vehicle, the heat-insulating wave-absorbing layer can obviously reduce the heat conductivity coefficient of the device, meanwhile, electromagnetic waves are reflected, absorbed and dissipated back and forth in the device, the dissipation and absorption of the electromagnetic waves are increased, and the device can be applied to key parts such as the front edge of the stealth unmanned aerial vehicle wing or the missile tail nozzle with the service temperature reaching 700 ℃ or even more than 1000 ℃ by combining the effect of the ablation-resistant layer.
Illustratively, referring to FIG. 2, the insulating and wave-absorbing layer 2 comprises a carbon foam substrate 21 and aerogel particles 22 filled in pores of the carbon foam substrate 21, wherein the pores of the carbon foam substrate 21 have a diameter of 20 to 40. Mu.m.
In the technical scheme, the porous structure of the carbon foam substrate is light in weight, dead weight of the unmanned aerial vehicle is reduced, aerogel particles are filled in the gaps, the heat conductivity of the device can be remarkably reduced by the aerogel particles with low heat conductivity, and convection heat conduction of gas in the framework holes of the carbon foam substrate can be inhibited, so that the heat insulation performance is further improved.
Illustratively, referring to FIG. 2, the skeletal surface of the carbon foam substrate 21 is provided with a strengthening coating 23 by chemical vapor deposition, wherein the strengthening coating 23 is a silicon carbide coating having a thickness of 1-3 μm.
In the technical scheme, before filling aerogel particles, melamine foam is placed in a high-temperature tube furnace, under the protection of inert atmosphere, high-temperature decomposition is carried out to obtain a carbon foam substrate, then trichloromethylsilane is used as a silicon carbide gas source, and a silicon carbide coating is deposited on the surface of a foam skeleton of the carbon foam substrate by a chemical vapor deposition method to obtain carbon/silicon carbide foam, wherein the density of the carbon/silicon carbide foam is only 20.25mg/cm 3 The maximum compressive strength of 1.02MPa is achieved at the strain of 8.88%, the compression modulus is up to 11.49MPa, the mechanical properties of the carbon/silicon carbide foam are obviously improved compared with those of a pure carbon foam substrate, and the reflection loss is reduced to-29.74 dB from the original-4.20 dB through test; the unique network structure of the carbon/silicon carbide foam can effectively avoid aggregation and accumulation of aerogel particles, and the high ratio of the nano material is reserved to the greatest extentThe advantages of the surface area meet the requirements of light weight, high strength and uniform texture.
Illustratively, referring to FIG. 2, the aerogel particles 22 are silicon carbide aerogel particles 22 having a pore size of 1-30nm, a porosity of 80-90%, and a specific surface area of 1000-1400m 2 /g。
According to the technical scheme, tetraethoxysilane and gamma-aminopropyl triethoxysilane are used as silicon sources of a gel reaction, resorcinol-formaldehyde resin is used as a carbon source of the gel reaction, sol gel is adopted and a carbothermal reduction technology is combined to prepare silicon carbide aerogel particles in pores of a carbon/silicon carbide foam skeleton, a large number of dislocation nodes, heterostructures and reflecting interfaces are formed in the preparation process of the silicon carbide aerogel particles, the characteristic dielectric property of the silicon carbide aerogel particles can effectively improve the impedance matching characteristic of the material surface and free space, the incidence of electromagnetic waves on the material surface is ensured, meanwhile, the specific surface area of the internal space is greatly increased, and the absorption and dissipation of the incident electromagnetic waves are further promoted; in addition, the unique network structure of the aerogel divides pores of the carbon/silicon carbide foam skeleton, so that a solid phase heat transfer path is prolonged, air convection conduction is greatly inhibited, meanwhile, the silicon carbide aerogel is an infrared absorption material with excellent performance, radiation heat transfer can be effectively controlled, the heat conductivity coefficient of the device is reduced, before aerogel particles are prepared, in order to improve the interface bonding strength of a silicon carbide coating on the surface of the foam skeleton and the silicon carbide aerogel, a silicon dioxide nano coating (not shown) is prepared on the surface of the silicon carbide coating in a low-temperature oxidation mode, the foam skeleton can be further strengthened, the silicon carbide nano coating can be used as a transition interface, can also react with residual pyrolytic carbon in the silicon carbide aerogel, the interface bonding force of the silicon carbide aerogel and the silicon carbide coating is improved, the problem that the thermal expansion coefficient of the silicon carbide aerogel is not matched in a high-temperature service environment is solved, and meanwhile, the silicon carbide material is extremely high-temperature resistant and high in chemical stability.
Illustratively, referring to FIG. 1, the aluminum alloy base plate 1 has a thickness of 1-2mm.
In the technical scheme, the aluminum alloy has low density, is favorable for reducing the dead weight of the unmanned aerial vehicle, has enough strength at the same time, and ensures the integral strength of the unmanned aerial vehicle.
Illustratively, referring to FIG. 1, the thickness of the insulating and wave-absorbing layer 2 is 4-8mm.
In the technical scheme, the heat-insulating wave-absorbing layer can obviously reduce the heat conductivity coefficient of the device, and meanwhile, electromagnetic waves are reflected, absorbed and dissipated back and forth in the device, so that the dissipation and absorption of the electromagnetic waves are increased.
Illustratively, referring to fig. 1, the reinforcing layer 3 is a carbon fiber reinforced resin matrix composite skin and has a thickness of 2-4mm.
In the technical scheme, the structural quality of the unmanned aerial vehicle is effectively reduced, and the bearing and transmitting pneumatic load is increased while the cost is reduced.
Illustratively, as shown in FIG. 1, the ablation resistant layer 4 is a carbon fiber reinforced phenolic carbon ablation resistant coating and has a thickness of 20-50 μm.
In the technical scheme, the ablation-resistant layer is used as an ultra-high temperature protective coating, improves the oxidation resistance, ablation resistance and thermal shock resistance of the surface of the device, and can be applied to key parts such as the front edge of the stealth unmanned aerial vehicle wing or the missile tail nozzle with the service temperature reaching 700 ℃ or even more than 1000 ℃.
In summary, the stealth device for the unmanned aerial vehicle has a simple structure, the silicon carbide coating is arranged on the surface of the skeleton of the carbon foam substrate, the mechanical property of the carbon foam substrate is obviously improved, as the reinforced skeleton of the aerogel particles, the silicon carbide aerogel particles with low thermal conductivity can obviously reduce the thermal conductivity of the device, and the silicon carbide aerogel particles have a nano-pore structure, so that the device has excellent properties such as low density, low thermal conductivity and the like; meanwhile, under the action of an electromagnetic field, the crystal phase of the silicon carbide forms polarization relaxation, so that the back and forth reflection, absorption and dissipation of electromagnetic waves in the device are promoted, and the dissipation and absorption of the electromagnetic waves are further increased.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely exemplary of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be comprehended within the scope of the application.
Claims (7)
1. The stealth device for the unmanned aerial vehicle is characterized by comprising an aluminum alloy base plate, wherein an exposed surface of the aluminum alloy base plate is provided with a heat insulation wave-absorbing layer, the heat insulation wave-absorbing layer is of a porous foam structure, an exposed surface of the heat insulation wave-absorbing layer is provided with a reinforcing layer, an exposed surface of the reinforcing layer is provided with an ablation-resistant layer, the heat insulation wave-absorbing layer comprises a carbon foam substrate of a porous structure and aerogel particles filled in pores of the carbon foam substrate, wherein the pore diameter of the carbon foam substrate is 20-40 mu m, and the aerogel particles are silicon carbide aerogel particles.
2. The cloaking device for a drone of claim 1, wherein: the surface of the skeleton of the carbon foam substrate is provided with a strengthening coating in a chemical vapor deposition mode.
3. The stealth device for a drone of claim 2, wherein: the reinforced coating is a silicon carbide coating, and the thickness of the reinforced coating is 1-3 mu m.
4. The cloaking device for a drone of claim 1, wherein: the thickness of the aluminum alloy base plate is 1-2mm.
5. The cloaking device for a drone of claim 1, wherein: the thickness of the heat insulation wave-absorbing layer is 4-8mm.
6. The cloaking device for a drone of claim 1, wherein: the reinforcing layer is a carbon fiber reinforced resin matrix composite material skin, and the thickness of the reinforcing layer is 2-4mm.
7. The cloaking device for a drone of claim 1, wherein: the ablation-resistant layer is a carbon fiber reinforced phenolic carbon ablation-resistant coating, and the thickness of the carbon fiber reinforced phenolic carbon ablation-resistant coating is 20-50 mu m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221315426.2U CN219055609U (en) | 2022-05-27 | 2022-05-27 | Stealth device for unmanned aerial vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221315426.2U CN219055609U (en) | 2022-05-27 | 2022-05-27 | Stealth device for unmanned aerial vehicle |
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| CN219055609U true CN219055609U (en) | 2023-05-23 |
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