326results about "Camouflage devices" patented technology

The invention discloses a sweating and cooling composite thermal protection structure based on a porous metamaterial, which belongs to the technical field of active thermal protection of aircrafts and comprises a layered metamaterial composite structure body. The layered metamaterial composite structure body sequentially comprises a spectrum stealth porous superstructure layer, an infrared thermal stealth porous superstructure layer and a hydrogel filling layer from top to bottom. The infrared thermal stealth superstructure porous material is used as a core, the anisotropic thermal conductivity characteristic of the infrared thermal stealth porous superstructure layer is achieved through the micro-nano structure design and different porosity distribution, transfer of surface heat flow in the horizontal direction and transfer of heat to the coolant phase change layer in the vertical direction can be accelerated, a sweating cooling mechanism is triggered, and the heat transfer efficiency is improved. Local high temperature of the surface is effectively eliminated, the average temperature of the surface is rapidly reduced, and the heat radiation amount is reduced, so that efficient thermal protection is achieved, the infrared thermal stealth function is achieved, and the spectrum stealth requirement is also met by combining the surface spectrum stealth porous superstructure layer.

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 relates to the technical field of military camouflage, and provides a rock-imitating camouflage apparatus based on multispectral matching and a design method thereof. The equipment comprises a camouflage surface layer, a first structural layer, a second structural layer and a third structural layer, the camouflage surface layer comprises an electromagnetic loss material, a binding material and a pigment body; phase change microcapsules are arranged in the first structural layer, the second structural layer and the third structural layer, and the content of electromagnetic loss substances is increased layer by layer; the design method is mainly a design method for disguising surface layer color matching. According to the invention, by constructing a layered impedance matching structure, a dynamic temperature field regulation and control system and a composite spectral feature cooperation mechanism, global spectral feature matching of an artificial structure and a natural rock mass in a millimeter wave / centimeter wave radar detection wave band, a middle and far infrared thermal imaging wave band and a visible light reconnaissance wave band is realized; and the concealment efficiency of strategic engineering under multi-spectrum reconnaissance can be obviously improved.

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.

A multi-layer radar-absorbing element (10) with adaptable properties for microwave absorption for vehicle components (20) is provided. The element (10) comprises a core layer (11) with a first layer thickness, an insulating layer (12) with a second layer thickness, and an outer absorption layer with a third layer thickness. The core layer (11) is made of a magnetically absorbent material. The insulating layer (12) is made of a material that is both electrically insulating and magnetically permeable. The outer absorption layer (13) is made of a material that is both electrically conductive and magnetically permeable. The insulating layer (12) is arranged between the core layer (11) and the outer absorption layer (13). Furthermore, a vehicle component (20) having a plurality of such radar-absorbing elements (10) and a method (40) for producing such a vehicle component (20) are provided.

A camouflage system, comprising at least one camouflage element which consists of at least one partial surface and which is controlled to display at least one camouflage pattern in order to achieve improved camouflage of vehicles and other objects. For this purpose, the partial surface of interest consists of at least one e-paper film.

The invention relates to the technical field of military stealth materials, in particular to a multiband infrared stealth composite material and a preparation method thereof.The multiband infrared stealth composite material comprises an outer layer and an inner layer, each of the outer layer and the inner layer comprises a base material layer and a functional plating layer which are sequentially arranged from outside to inside, the base material layer is formed by blending aramid fibers and conductive fibers, and the functional plating layer is formed by blending the aramid fibers and the conductive fibers. The surface of the base material layer is provided with an infrared regulation and control printing layer, the infrared regulation and control printing layer is made of ITO / ATO composite oxide, the functional plating layer comprises a first aluminum plating layer and a first boron nitride layer which are sequentially arranged from outside to inside, and the first boron nitride layer on the outer layer and the first boron nitride layer on the inner layer are in composite connection through an adhesive layer. The first aluminum plating layer and the first boron nitride layer are combined in a sequential plating manner; the aramid fibers and the conductive fibers are blended, the mechanical property of the material is guaranteed, the base material layer is matched with the synergistic effect of the infrared regulation and control printing layer and the functional plating layer, the emissivity of the whole material is reduced, and effective regulation and control in a broadband are achieved.

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 discloses a functional fabric capable of synchronously achieving electric heating and infrared stealth and a preparation method and application thereof.The fabric is of a sandwich structure, the outer layer is an infrared stealth layer, cellulose is used for modifying the fabric, the porosity is reduced, the capillary action is improved, a low-emissivity material and the fabric are tightly combined, the surface is smooth, the problem that inorganic materials fall off is solved, and the fabric has the function of infrared stealth. The infrared stealth effect is enhanced; the interlayer is a heat insulation layer, the aerogel is subjected to silanization modification, rigid chain segments are introduced to form a rigid-flexible physical cross-linked network, the hydrogen bond strength and mechanical performance are improved, heat loss of the inner layer is slowed down, collaborative stealth is achieved, and infrared stealth of the thin aerogel under heating is achieved; the inner layer is an electric heating layer, PEDOT: PSS and CF are compounded, and the pi-pi conjugation action of the PEDOT: PSS and the CF changes the arrangement of macromolecular chains, reduces the contact resistance of the CF, improves the conductivity of the PEDOT: PSS and enhances the electric heating performance.

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 relates to the technical field of battlefield vehicle protection, and discloses a battlefield vehicle protection device capable of resisting attack of an unmanned aerial vehicle and a manufacturing method of the battlefield vehicle protection device. The protective layer plate sequentially comprises a camouflage coating, a top bullet shielding layer, a middle energy absorption core layer and a bottom anti-collapse layer from outside to inside, and the camouflage coating is used for camouflage; the top bullet shielding layer is used for absorbing radar waves to stealth and resisting armor penetrating bullets; the middle energy absorption core layer is used for reducing explosive shock waves to achieve anti-explosion energy consumption and interference jet flow. And the bottom anti-seismic collapse layer is used for preventing the middle energy-absorbing core layer from collapsing under the explosive load and holding concrete blasting fragments. According to the protection device provided by the invention, through a laminate structure formed by combining the top bullet shielding layer, the middle energy absorption core layer and the bottom anti-collapse layer, the anti-penetration performance is greatly improved, and the protection device has a relatively strong protection function on battlefield vehicles such as tanks and armored cars which are resistant to radar stealth and attack of small unmanned aerial vehicles.

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 multi-functional modularization integration camouflage net relates to camouflage net technical field, including camouflage net body, connecting cloth, connector, ground nail and connecting piece, the upper end face of connecting cloth is equipped with connecting column, the upper end face of connecting cloth is connected with elastic connecting strip, the left end face of connecting cloth that is arranged symmetrically is equipped with through hole, and the connecting piece is connected with the elastic connecting strip. The connector is provided with a plurality of fixing holes, the fixing holes are matched with the connecting blocks, limiting pieces are arranged in the fixing holes, and the limiting pieces are used for fixing the connecting blocks. The camouflage net body can be spliced by arranging the connector and the connecting blocks, so that the camouflage net body is modularized, and after part of the camouflage net is damaged, the camouflage net body can be conveniently replaced; the novel stretcher is simple in structure and convenient to use, only the damaged part needs to be replaced, so that the replacement cost is reduced, the elastic connecting strips and the through holes are arranged, a simple stretcher can be formed after the stick bodies penetrate through the through holes, emergency use is facilitated, and the bearing capacity and the tensile capacity can be improved through the elastic connecting strips with elasticity.

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 invention relates to a conductive metal organic framework-based self-supporting wave-absorbing block with a Jaumann structure as well as a preparation method and application of the conductive metal organic framework-based self-supporting wave-absorbing block. The wave-absorbing block is constructed by a two-dimensional conductive metal organic framework and an insulating high polymer in a layer-by-layer alternate stacking manner. The wave-absorbing block prepared by the invention can realize broadband and strong absorption of electromagnetic waves under the condition of low filler loading capacity, is simple in preparation process and low in cost, has the potential of realizing large-scale and large-batch production, and has wide application potential and market prospect in the field of electromagnetic safety protection.

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 tunable infrared selective thermal emitter based on a cylindrical structure array belongs to the field of micro-nano optoelectronic technology; it is composed of multiple tunable structural units arranged periodically. Sunlight is incident in the form of a plane wave. Each tunable structural unit includes a substrate layer, a buffer layer, and an antenna from bottom to top. The substrate layer and the buffer layer are square in shape, and the antenna is a three-layer cylindrical structure. The structure of the present invention is simple. In the atmospheric windows of 3-5μm and 8-14μm, the average emissivities are about 0.20 and 0.18 respectively, and the average emissivity in the non-atmospheric window of 5-8μm is about 0.80. Moreover, it is not affected by the polarization of the light source and has good emission effects within the incident angle range of 0°-60°. The addition of GST enables the thermal emitter to not only meet the requirements of low emissivity in the atmospheric window and radiative heat dissipation in the non-atmospheric window, but also tune the infrared emissivity spectrum to achieve switching between the infrared "stealth" and "non-stealth" states.

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 invention provides an intelligent inflatable false target supporting device with a variable structure and a quick connection module. The intelligent inflatable false target supporting device comprises an inflatable outer layer, an upper body supporting framework and a lower body supporting framework, the upper body supporting framework is arranged on the lower body supporting framework, and the inflatable outer layer covers the outer sides of the upper body supporting framework and the lower body supporting framework; the upper body supporting framework comprises two sets of telescopic combined rod pieces which correspond to each other up and down, each telescopic combined rod piece comprises a rectangular frame defined by a first telescopic rod, a first horizontal rod, a second telescopic rod and a second horizontal rod, and the opposite faces of the horizontal rods corresponding to the two sets of telescopic combined rod pieces are connected through a rotatable X-shaped folding frame. The lower body supporting framework comprises a supporting main body and a plurality of supporting parts capable of being contained in the supporting main body. According to the intelligent inflation false target supporting device, flexible change of an internal supporting structure can be achieved, different modules can be rapidly assembled, and intelligent regulation and control of integration of inflation and internal supporting are achieved.

The invention discloses a crystal-amorphous composite Zr-Si-O barrier layer material and a preparation method and application thereof, and belongs to the technical field of functional coating materials. The material of the crystal-amorphous composite Zr-Si-O barrier layer comprises zirconium oxide crystal grains and amorphous SiO2, and the amorphous SiO2 covers the surfaces of the zirconium oxide crystal grains to form a coating layer. The crystal-amorphous composite Zr-Si-O barrier layer material can make up for the defects of phase change, cracking, poor surface compactness and the like of the existing barrier layer material at high temperature, and has high-temperature stability and low emissivity performance at the same time. The crystal-amorphous composite Zr-Si-O barrier layer material provided by the invention adopts an electron beam evaporation process, and has the advantages of high oxide deposition rate, uniform prepared surface layer, high compactness, low process temperature, simple method, short period, low cost and the like.

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.