222results about "Camouflage devices" patented technology

The invention belongs to the field of protective materials, and particularly relates to a 3D printing high-performance porous silicon carbide ceramic wave-absorbing material and a preparation method and application thereof. The extrusion type 3D printing technology is combined with the reaction sintering and impregnation technology, the complex structure forming and the high-performance wave absorbing effect are achieved, the material prepared through the method has excellent mechanical performance and wave absorbing performance at the same time (the bending strength is larger than 15 MPa, the reflection loss minimum value at the frequency band of 2-18 GHz is larger than-25 dB, and the absorption bandwidth is larger than 3 GHz), and the material has the good application prospect. The method is suitable for military stealth engineering and other fields.

The invention provides a visible and infrared dual-band stealth material and a preparation method thereof. The visible and infrared dual-band stealth material comprises a thermochromic ink layer, a transparent conductive layer, a quartz glass substrate and a phase change material layer which are sequentially arranged, wherein the phase change material layer is arranged in a grid shape; and the material of the phase change material layer is selected from VO2 or sulfur germanium antimony tellurium. The surface phase-change material layer of the stealth material is arranged in a grid shape, the color-changing ink layer at the bottom can be directly seen by naked eyes, camouflage patterns are formed on the color-changing ink layer through printing, and the dynamic visible light camouflage function is achieved; when the top layer VO2 or chalcogenide germanium antimony tellurium is in a phase transformation state, the infrared reflectivity of the top layer VO2 or chalcogenide germanium antimony tellurium becomes high, the emissivity becomes low, and therefore the dynamic infrared camouflage function is achieved. Joule heat can be generated when voltage is applied to the transparent conductive layer, and the heat enables the color of the color-changing ink layer to change, so that the visible light camouflage function can be adapted to various scenes. Visible and infrared dual-band stealth can be achieved, dynamic stealth can also be achieved, and the application requirements of multiple spectrums and multiple scenes are met.

The invention is suitable for the technical field of multifunctional textile materials, and provides a wave-absorbing type flame-retardant electromagnetic shielding fabric and a preparation method and application thereof.The wave-absorbing type flame-retardant electromagnetic shielding fabric takes aramid fiber / stainless steel blended fabric as a base material, and the surface of the base material is coated with a functional coating; the functional coating is composed of a waterborne polyurethane matrix, a NiZnFe2O4 and MnO2 / GA composite wave absorbing agent dispersed in the waterborne polyurethane matrix, an ammonium polyphosphate flame retardant and a catalyst p-toluenesulfonic acid; under the catalysis of p-toluenesulfonic acid, carrying out esterification reaction on ammonium polyphosphate, the waterborne polyurethane matrix and oxygen-containing functional groups in the graphene aerogel to form a phosphorus-oxygen-carbon covalent cross-linked network; the invention successfully solves the technical problem of collaborative integration of wave-absorbing and flame-retardant properties, has the characteristics of light weight, flexibility, environmental friendliness and the like, and is suitable for the field of high-end flexible electromagnetic protection and fireproof safety.

The invention belongs to the technical field of textile materials, and relates to an environment-adaptive multi-spectrum camouflage cloak and a preparation method thereof. Comprising a cloak body, the cloak body is made of composite fabric, the composite fabric sequentially comprises a wear-resistant layer, a waterproof layer and a close-fitting layer from outside to inside, and the surface of the wear-resistant layer is sequentially coated with a thermochromic dye layer, a far infrared plating layer and a visible light hiding layer from bottom to top; the thermochromic dye layer is formed by compounding disperse dye and bistable thermochromic microcapsules, and the visible light stealth layer is prepared from photonic crystal gel; and the far infrared plating layer is prepared from an indium tin oxide film. The desert camouflage is switched below 5 DEG C, the woodland camouflage is switched above 60 DEG C, and different regional environments are matched; according to efficient multi-spectrum camouflage, the color difference between the visible light band and the background is smaller than or equal to 1.95, three emissivity levels are formed in the infrared band, and the thermal imaging detection probability is reduced.

The invention discloses a multispectral compatible camouflage and radiant heat management device and a multispectral camouflage system based on the same, relates to the field of multispectral camouflage materials and heat management, and aims to solve the problems of poor spectrum compatibility, narrow bandwidth, insufficient heat management and high angle sensitivity in the prior art. A phase change material layer is arranged on the metal substrate layer, and a phase regulation and control layer of a chessboard structure is arranged on the phase change material layer. According to the invention, the radar scattering cross section is large, the specular reflectance is very low, the performance can still be maintained in the incidence angle range of 0-30 degrees, the reflectance is not sensitive to the incidence angle and the polarization state, laser stealth, radar stealth and infrared camouflage can be realized, the spectrum compatibility is good, the bandwidth is wide, dynamic heat dissipation in a non-window can be realized, and the performance is stable. And the heat management effect is achieved.

An infrared cloaking material includes a copper-coated fabric and a layer of zinc oxide. The copper-coated fabric includes an inner layer of copper, a layer of fabric, and an outer layer of copper as the layer of fabric is composed of an inner fabric surface and an outer fabric surface. The inner fabric surface and the outer fabric surface being positioned opposite of each other about the layer of fabric. The inner layer of copper is superimposed onto and across the inner fabric surface. The outer layer of copper is superimposed onto and across the outer fabric surface. The layer of zinc oxide is positioned adjacent to the inner layer of copper, opposite of the layer of fabric as the layer of zinc oxide is superimposed onto and across the inner layer of copper.

A method for making a reversible or adaptable camouflage scheme on a vehicle comprises first, second and third steps. The first step is to apply a first, base, coat of paint of a first colour on the m

The invention is a covering device that acts as both a visual camouflage and as a thermal blocker to cover people and equipment (e.g., vehicles). Specifically, the covering device effectively reduces and / or prevents thermal, infrared, and visual detection of any subject (e.g., person or equipment) positioned under the device. The covering device includes a unique arrangement of apertures that has been surprisingly shown to reduce and diffuse both the heat and visual signature of the subject.

The utility model discloses a camouflage net stretching device. The camouflage net stretching device comprises a top support, four bottom supports, four pull ropes and four ground nails. According to the camouflage net stretching device, the top support is detachable, and the bottom support and the supporting stand columns are detachable, so that the net stretching device can be detached and stored, the occupied space of the net stretching device in the stored state is small, and the net stretching device is convenient to store or transport and move; the camouflage net can be supported through the pull ropes and the ground nails, and positioning and fixing of the camouflage net are facilitated.

Camouflage coating systems, apparatuses, and methods described herein may include a coating deposited and bonded to a region of an external surface of an object to be camouflaged. The coating may include a plurality of stacked material arrangements deposited and bonded sequentially onto the region of the external surface and arranged to define a laterally distributed plurality of independent camouflage profiles. The coating may be configured to adjust coating emissivity at visual and IR wavelengths and to block or adjust infrared (IR) emitted by the object, thereby concealing the region of the external surface of the object from detection by a detection method in the visual, infrared, and electromagnetic regimes.

The present invention discloses a method for preparing a multilayer gradient absorbing material. The preparation method comprises the following steps: 1) preparing a quartz fiber dispersion; 2) preparing quartz fibers; 3) preparing a quartz fiber composite aerogel; 4) preparing a carbon fiber composite aerogel; and 5) assembling the material. The present invention proposes a green, convenient, and low-cost process for preparing a multilayer gradient absorbing material with excellent absorbing properties. Flexible quartz fiber aerogel, quartz fiber composite aerogel, and carbon fiber composite aerogel are prepared separately. By combining these materials, a gradient impedance design is achieved, thereby enhancing the material's absorbing properties. This solves the problem of poor absorbing performance of a single material or structure. The proposed method for preparing an ultra-light, flexible multilayer absorbing material has low production costs, short processing time, and strong operability, making it suitable for mass production. Importantly, this material exhibits excellent flexibility, electromagnetic wave absorption, and thermal insulation properties, and is expected to be used in various fields, including next-generation stealth aircraft and portable electronic devices.

The invention provides a miniature aircraft skin with energy collection and multispectral stealth functions, and belongs to the technical field of energy collection and spectral stealth, the miniature aircraft skin is composed of a periodic Al2O3-W multi-layer structure, and the multi-layer structure is formed by stacking a top oxidation film layer and N unit layers; each unit layer comprises a W layer and an Al2O3 layer, energy collection and multispectral camouflage are combined, the skin not only shows efficient photothermal conversion performance, but also meets visible light, laser and infrared compatible camouflage requirements, and the performance of a miniature aircraft in a complex environment is effectively improved; the problems that energy supply of a micro aircraft is limited and unstable, and a traditional camouflage structure is difficult to be compatible with visible light, infrared camouflage and laser camouflage multispectral stealth requirements are solved, and the manufacturing cost is reduced.

The invention relates to a method and a system (10) for displaying a viewing direction-dependent view for a predetermined location. The predetermined location, including its surroundings, is captured from one or more viewing directions (15), with or without one or more objects (12) at the location. One or more objects (12) at the predetermined location are then obscured by a three-dimensional display device (20). Based on the images captured in the preparation phase (200), a display model is calculated. This model allows the predetermined location, including its surroundings, to be displayed using the light-activated elements (22) of the display device (20) for each of the one or more predetermined viewing directions (15) or for each viewing direction (15) within the one or more predetermined solid angles. In the absence of one or more objects (12), the location can be displayed from the respective viewing direction (15). In an application phase (206) a momentary viewing direction (15) is determined, a representation of the predetermined location together with its surroundings in the absence of one or more objects (12) is determined from the momentary viewing direction (15) by means of the display model and is displayed by means of the light-active elements (22) of the display device (20) in relation to the momentary viewing direction.

The invention discloses a lotus leaf carbon-based iron-cobalt composite hollow broadband wave-absorbing material and a preparation method and application thereof.The lotus leaf carbon-based iron-cobalt composite hollow broadband wave-absorbing material is prepared by the steps that lotus leaves serve as a framework material, lotus leaf biochar is prepared after high-temperature treatment, then the lotus leaf biochar reacts with ferric acetylacetonate and cobalt acetylacetonate, and then the CoFe-coated CoFe2O4 / C composite material is prepared after high-temperature treatment. The preparation process is relatively simple to operate, required equipment is common, and reaction conditions are easy to control; raw materials are low in cost, energy consumption is low, and large-scale production and wide application are facilitated; the prepared composite wave-absorbing material has the advantages of being high in absorbing capacity and wide in effective absorbing frequency band, and can be applied to absorption of electromagnetic waves.

The application relates to the technical field of intelligent camouflage, and provides a flexible electrochromic bionic structure and a preparation method thereof, which comprises the following steps: preparing a reflective resonant cavity composed of a reflective metal layer and an electrochromic layer on a flexible microporous substrate. The reflective resonant cavity forms an initial camouflage color, then the optical constant of the electrochromic layer is changed by applying a voltage to change the camouflage color, visible light camouflage is realized, and the infrared emissivity is adjusted to eliminate / reduce the difference in infrared radiation characteristics between the target and the background, so that infrared camouflage is realized. Therefore, the electrochromic effect is improved.

An article includes a substrate with a surface, a coating disposed over the surface, and a subtractive colorant which absorbs electromagnetic radiation according to a specified absorption spectrum. The coating includes a binder material and a plurality of porous polymer particles having pores with a distribution of pore sizes adapted to scatter electromagnetic radiation in one or more specified wavelength bands, wherein the porous polymer particles have a shell which is impermeable to a liquid.

The utility model relates to the technical field of camouflage nets, and discloses a sandy soil camouflage toggle clip camouflage net structure which comprises a bottom net, a color strip layer is arranged at the top of the bottom net, a plurality of groups of camouflage strips are arranged on the color strip layer, a plurality of groups of toggle clips are arranged at the top of the bottom net, and the toggle clips are used for limiting and fixing the camouflage strips. According to the sandy soil camouflage toggle clip camouflage net structure, the camouflage strips on the colored strip layer can be fixed through the toggle clip piece, stable supporting and fixing points are provided for the camouflage strips, the toggle clip can tightly grasp the camouflage strips under various complex environment conditions no matter whether the camouflage strips are lightly fished by breeze or attacked by strong wind, the camouflage strips are effectively prevented from flying around, and the camouflage net structure is simple in structure and convenient to use. In this way, the camouflage net always keeps complete and stable appearance in the long-time use process, and the reliability and durability of the camouflage effect are greatly improved.

Provided in the present invention are an electromagnetic wave unidirectional cloaking apparatus and a preparation method, relating to the technical field of electromagnetic wave cloaking. The apparatus comprises a type I photonic crystal doped with loss impurities, a type II photonic crystal containing a cloaking substance, and a type I photonic crystal doped with gain impurities; the type I photonic crystal doped with loss impurities, the type II photonic crystal containing a cloaking susbtance, and the type I photonic crystal doped with gain impurities are arranged in sequence; the type I photonic crystals have Dirac-like dispersion and the type II photonic crystal has a photonic band gap, and the Dirac-like point frequency of the type I photonic crystal is the same as the band edge frequency of the photonic band gap of the type II photonic crystal; the loss impurities doped into the type I photonic crystal and the gain impurities doped into the type I photonic crystal satisfy the following conditions: the relative dielectric constants thereof satisfy complex conjugation, and the relative magnetic permeability thereof is 1. The cloaking effect of the apparatus of the present invention is unidirectional, and the cloaking electromagnetic wave frequency is tunable.

The application relates to the technical field of camouflage smoke discharging, and discloses a gas-spraying type smoke camouflage device which comprises a storage tank and a smoke spraying pipe, an activity cavity is arranged in the storage tank, a transmission gear wheel is rotationally connected to the inner side wall of the activity cavity, a first driven gear wheel and a second driven gear wheel are also rotationally connected to the inner side wall of the activity cavity, the first driven gear wheel and the second driven gear wheel are connected in mesh with the transmission gear wheel, a first driven rod and a second driven rod are fixedly connected to one end of the first driven gear wheel and the second driven gear wheel respectively, and helical blades are fixedly connected to the surfaces of the first driven rod and the second driven rod. The device can rapidly stir and mix the smoke agent, avoids stratification of the smoke agent, guarantees full combustion of the smoke agent, avoids backflow of the smoke agent, rapidly forms a smoke screen, forms camouflage for a transport vehicle, and guarantees safety of the transport vehicle.

The invention discloses a crawler-type remote control camouflage protection smoke screen vehicle and a working method, the crawler-type remote control camouflage protection smoke screen vehicle comprises a chassis, a smoke generating device and a box body, the chassis is a crawler-type mobile vehicle, the smoke generating device and the box body are both arranged on the chassis, and the smoke generating device is arranged in front of the box body; the fuming device is installed on the chassis through a left-right rotating head driving device and an up-down rotating head driving device, a turbojet engine and a spraying pipe are arranged in the fuming device, and the spraying pipe is arranged at the front end of the turbojet engine; a left-right rotating head limiting switch is arranged on the left-right rotating head driving device, and an up-down rotating head limiting switch is arranged on the up-down rotating head driving device; a smoke master control system is arranged in the box body, and the smoke generating device, the moving mechanism, the left-right rotating head driving device and the up-down rotating head driving device are all connected with the smoke master control system. The problems that an existing smoke screen vehicle is low in rapid transfer capacity on complex terrains and cannot rapidly adapt to environmental changes are solved.

A yarn structure (14) is provided for use in a camouflage net. It comprises first (3), second (4) and third (5) yarn elements comprising, respectively, polymer, metal and carbon- or graphene-based material. The yarn elements are combined to form the yarn structure. The second yarn element (4) is present in an amount sufficient to provide radar scattering capabilities. The third yarn element (5) is present in an amount sufficient to reduce radar reflectivity of the yarn structure, compared to a yarn structure without the third yarn element.

The present invention discloses an array-type infrared stealth device based on semiconductor refrigeration sheets, which belongs to the field of infrared stealth equipment. The present invention uses a focal plane sensor to scan and obtain the ambient temperature field around the object to be hidden, and then maps it to the semiconductor refrigeration sheet array as the target temperature. The temperature field captured by the infrared focal plane sensor is accurately reflected in the array through the PID control of the semiconductor refrigeration sheet. The present invention can well simulate the infrared characteristics of the environment around the object to be hidden, and has good realism and accuracy. At the same time, the device can be used in scenes where the subject moves. Through the continuous measurement and update of the temperature data by the focal plane sensor, the thermal field pattern of the array subject will also change accordingly, and can be used in scenes of dynamic infrared stealth.

This invention relates to the field of patrol camouflage technology. It discloses a dynamic cloak camouflage control system for patrol unmanned vehicles, comprising a main compartment rotatably connected above a drive unit and a collection compartment fixedly connected above the main compartment. Multiple dynamic camouflage modules are arranged from the inside out on the top of the main compartment, located outside the collection compartment. Each dynamic camouflage module includes a main camouflage layer covering the outside of the main compartment and a collection camouflage layer covering the outside of the collection compartment. The multiple dynamic camouflage modules can be retracted and switched. The dynamic camouflage modules achieve complete coverage through the outer enclosure of the main camouflage layer combined with the inner enclosure of the collection camouflage layer. Simultaneously, the collection camouflage layer and the main camouflage layer can be used to enclose unused dynamic camouflage modules, increasing concealment and allowing multiple dynamic camouflage modules to be selectively replaced based on location information and environmental conditions.

The utility model discloses a flexible shielding protection structure which comprises a lifting support assembly, a plurality of supporting assemblies and an intercepting net. The lifting support assembly is fixed to a vehicle in a bolting or welding mode, the upper ends of the supporting assemblies are fixedly installed at the top end of the lifting support assembly, the lower ends of the supporting assemblies can move in the vertical direction to achieve folding of the supporting assemblies, and the intercepting net is installed on the intercepting net supporting assembly. According to the utility model, the structure of the conventional flexible shielding protection device is changed, the deformation and expansion of the vehicle protection function are facilitated, the structure is compact, the weight is light, the rapid expansion can be realized, the attack of an aircraft can be effectively intercepted, the explosion height of explosives is changed, and the device is convenient to carry and applicable.

This invention discloses a modular full-spectrum high-efficiency electromagnetic shielding flexible fabric and its preparation method, belonging to the field of electromagnetic shielding material design and preparation. The preparation method of this invention includes the following steps: (1) using a magnetron sputtering system to perform metal deposition treatment on the fabric to obtain a flexible conductive fabric A; (2) using vacuum coating technology to perform metal deposition treatment on the surface of a polymer film to obtain a high-toughness conductive film B; (3) mixing carbon-based microwave absorbing material and polymer with solvent uniformly and curing to obtain a microwave absorbing layer C of a certain thickness; (4) arranging and encapsulating the functional modules obtained in steps (1), (2), and (3) in a specific arrangement to obtain the modular full-spectrum electromagnetic shielding flexible composite fabric.

The application discloses a lotus leaf carbon-based iron-cobalt composite hollow broadband wave-absorbing material and a preparation method and application thereof. The composite material takes lotus leaves as a skeleton material, and lotus leaf biochar is prepared after high-temperature treatment. Then, the lotus leaf biochar is reacted with acetylacetone iron and acetylacetone cobalt, and then high-temperature treatment is carried out to prepare a CoFe@CoFe2O4 / C composite material. The preparation process is relatively simple, common equipment is required, and the reaction condition is easy to control. The raw material cost is low, the energy consumption is low, and the large-scale production and wide application are facilitated. The prepared composite wave-absorbing material has the advantages of strong absorption capacity and wide effective absorption frequency band, and can be applied to the absorption of electromagnetic waves.

The invention discloses a hyperspectral camouflage fiber fabric based on a flocking technology. The hyperspectral camouflage fiber fabric comprises an ultra-black fluff layer, an adhesive layer, a near-infrared absorption layer and an ultra-black base cloth layer which are sequentially arranged from top to bottom. Through a multi-layer synergistic structure, the fitting degree of the material and an ocean background spectrum at the wave band of 400-2500nm reaches 0.91 or above, the characteristics of weak reflection of visible light and strong absorption of near infrared light are reproduced, the problem of poor matching precision is solved, hyperspectral reconnaissance is avoided, and the concealment of ocean equipment is improved. The invention has the advantages of strong environmental adaptability, easy mass production, humidity and heat resistance of grade 1, no abnormity at-20 DEG C to 50 DEG C, and color fastness to sunlight of grade 5, and adapts to complex marine environment; based on a mature flocking technology, complex equipment is not needed, large-scale production can be achieved, and stability and economical efficiency are both considered.

A building is disclosed and may include a truss-framed building structure, at least one of an internal shell and an external shell, and a suspended netting system disposed above and coupled to the truss-framed building structure. The at least one of the internal shell and the external shell may be coupled to the truss-framed building structure.

The application discloses graphene-MXene composite aerogel as well as a preparation method and application thereof. The preparation method of the graphene-MXene composite aerogel comprises the following steps: 1) preparing an oxidized graphene-MXene water dispersion; 2) preparing an oxidized graphene-MXene frozen block; 3) preparing an oxidized graphene-MXene composite aerogel; and 4) annealing the oxidized graphene-MXene composite aerogel. The graphene-MXene composite aerogel has a multi-layer gradient structure, excellent compression resilience, dynamic infrared stealth and wide-band microwave absorption dual functions, and the preparation method is simple, so that the graphene-MXene composite aerogel can be widely applied in the fields of electronic communication, aerospace and the like.

The invention discloses a beetle elytra-imitated interlocking structure, a metamaterial plate comprising the beetle elytra-imitated interlocking structure and a composite armor system, and belongs to the field of multifunctional advanced protective materials. The interlocking structure comprises a plurality of functional elements arranged in a planar array, the adjacent functional elements are mechanically connected through geometric interlocking interfaces, the contact surfaces of the geometric interlocking interfaces are in a non-chemical bonding state and can generate relative dislocation under an impact load, and the geometric interlocking interfaces are in a non-chemical bonding state. Each functional element is integrally prepared from a polymer-based composite material dispersed with an electromagnetic loss filler, the interior of each functional element is of a three-dimensional porous micro-lattice structure with a negative Poisson's ratio effect, and the porosity and / or cell size of each three-dimensional porous micro-lattice structure are / is changed in a gradient manner in the thickness direction of the corresponding functional element. The metamaterial plate and the composite armor system using the interlocking structure can effectively inhibit structural layering under an impact load, can actively improve anti-penetration capability, and also have an excellent broadband electromagnetic wave absorption function.