Pixelized thermally-driven environment self-adaptive camouflage system and application thereof

Abstract

The invention relates to a pixelated thermally-driven environment adaptive camouflage system and application, the system comprises an environment identification module and an adaptive camouflage module, the environment identification module is used for collecting an environment background image and generating a camouflage control signal, and the adaptive camouflage module realizes dynamic camouflage by controlling a driving unit and a basic working unit. The basic working unit is composed of an infrared shielding skin, a radar absorption skin, an environment camouflage skin and other hierarchical structures and can cope with infrared detection, radar detection and visible light remote sensing at the same time, and the hiding effect is enhanced. The environment camouflage skin of the system is prepared by mixing a functional polymer material and a thermochromic capsule, and has excellent thermal stability and adaptability. The infrared shielding film and the radar absorbing film which are prepared by adopting a magnetron sputtering process and a photoetching process respectively have optimized square resistance, and effective infrared wave shielding performance and effective radar wave absorbing performance are ensured. Through the technical scheme of the invention, the whole camouflage system can realize rapid color change and environment adaptability in a complex environment, and the concealment and dynamic response capability are greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of multi-band compatible stealth technology, and in particular to a pixelated thermally driven environment adaptive camouflage system and applications thereof. Background Art

[0002] With the rapid development of satellite remote sensing technology, modern military and security fields have put forward higher requirements for camouflage technology. Traditional camouflage methods, such as camouflage paint or static camouflage jackets, mainly rely on colors and patterns to simulate natural backgrounds to conceal targets. However, these static camouflages are limited in effectiveness in the face of multi-band monitoring and complex background environments, especially in dealing with multi-spectral detection such as infrared, visible light and radar. Satellite remote sensing technology is able to monitor the surface at extremely high resolution and a wide spectrum range (from visible light to infrared bands). Traditional camouflage methods are difficult to effectively confuse modern multi-band detection systems due to their single band adaptability.

[0003] Existing technologies have made breakthroughs in dynamic camouflage, usually using LED lights, multi-color liquids, or liquid crystal materials to achieve multi-spectrum camouflage. However, these methods still have significant defects. First, most traditional dynamic camouflage systems perform large-area color changes in the visible light band, and can only simulate one color at a time. They lack sufficient flexibility and are difficult to fully blend into the background in environments with complex or mottled background colors. Secondly, many existing camouflage methods fail to take into account infrared stealth or radar stealth effects, making them easily detected in modern multi-spectral detection systems.

[0004] There are already some technical solutions that attempt to solve the problem of multi-spectral stealth. For example, Chinese patent application with publication number CN118258266A discloses a composite metasurface based on optoelectronic coordinated regulation, but it is mainly used for infrared camouflage and cannot achieve visible light and radar stealth. Chinese patent CN118517961A controls the fusion of liquid colors through microfluidics. Although it achieves visible light camouflage, the system is complex and difficult to recycle, and radar stealth cannot be achieved. Chinese patent applications with publication numbers CN114322663A and CN117471404A respectively disclose visible-infrared compatible camouflage systems and adaptive stealth systems, but the implementation of these methods mostly relies on liquid crystal materials, and the color change temperature range of liquid crystal materials is narrow, easily affected by external temperature, and large-area color change cannot cope with changes in complex background environments.

[0005] Based on the above shortcomings, the existing camouflage technology still has great deficiencies in the flexibility and environmental adaptability to cope with multiple detection bands. At present, there is an urgent need for an adaptive camouflage system that can adapt to complex environmental backgrounds and has multi-spectral stealth effects, especially under multi-band and multi-angle monitoring, which can achieve an integrated solution of visible light, infrared and radar stealth, so as to better cope with the challenges of modern satellite remote sensing and multi-spectral detection. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a pixelated thermally driven environmental adaptive camouflage system to solve the problems of poor stealth effect, insufficient dynamic adaptability and poor environmental adaptability existing in conventional camouflage systems in the prior art under multi-band detection conditions.

[0007] In order to solve the above technical problems, the present invention provides a pixelated thermally driven environment adaptive camouflage system, comprising an environment recognition module and an adaptive camouflage module, wherein the environment recognition module is used to collect an environment background image and generate a camouflage control signal; the adaptive camouflage module comprises a control drive unit and a basic working unit, wherein the control drive unit is used to receive the camouflage control signal generated by the environment recognition module and process the control signal;

[0008] The basic working unit comprises an infrared shielding skin, a first medium, a radar absorbing skin, a second medium, an environmental camouflage skin, a heating sheet and a temperature sensor which are stacked in sequence from top to bottom;

[0009] The environmental camouflage skin is prepared by mixing functional polymer materials with thermochromic capsules.

[0010] Compared with the prior art, the pixelated heat-driven environment adaptive camouflage system in the present application has the following advantages: strong dynamic adaptability: the present invention adopts an environmental recognition module, which can analyze the background environment in real time and generate corresponding camouflage control signals, ensuring that the system can quickly adjust according to different environmental changes and achieve effective dynamic camouflage; excellent multi-band stealth effect: through the combination of the infrared shielding skin and the radar absorption skin designed by the stacking design, it can effectively shield infrared and radar detection at the same time, and improve the stealth performance of the system under multi-band detection; pixelated thermal drive technology: the environmental camouflage skin combined with the thermochromic capsule can achieve color changes under different temperature conditions, enhance environmental adaptability, and enable the system to achieve better mimicry effect under complex backgrounds; modular design: the functions of each module are clear, which is convenient for system integration and maintenance, and can also be flexibly adjusted according to actual needs. Through the implementation of the above technical solutions of the present application, the limitations of the camouflage system mentioned in the background technology in complex environments can be effectively solved, and a more efficient stealth effect can be achieved, which not only improves the dynamic adaptability of the camouflage system, but also enhances its concealment in a multi-band detection environment, thereby requiring high requirements for camouflage technology.

[0011] As a preferred solution, the functional polymer material includes one or more of polydimethylsiloxane, polyurethane resin, fluorocarbon resin and epoxy resin.

[0012] Compared with the existing technology, the functional polymer materials selected by the above technical scheme have good thermal stability, weather resistance and excellent chemical stability. These characteristics enable the environmental camouflage skin to maintain its function under extreme environmental conditions. Polydimethylsiloxane (PDMS) has good flexibility and transparency, which enables it to better imitate the surrounding environment in visual camouflage; polyurethane resin provides good mechanical strength and wear resistance; fluorocarbon resin has excellent corrosion resistance and can resist the erosion of various chemical substances; and epoxy resin helps to enhance the overall structural strength of the material; by selecting a variety of functional polymer materials and their combinations, the stealth effect of the environmental camouflage skin in different bands (such as visible light, infrared and radar bands) can be significantly improved, and good adhesion and stability can be maintained under different temperatures and environments.

[0013] As a preferred solution, the infrared shielding skin and the radar absorbing skin are both composed of one or more materials selected from indium tin oxide, antimony tin oxide or aluminum-doped zinc oxide, and the square resistance of the infrared shielding skin is 5-15Ω / sq, and the square resistance of the radar absorbing skin is 50-150Ω / sq.

[0014] Compared with the prior art, the above technical solution can effectively cope with both infrared detection and radar detection by integrating the materials of the infrared shielding skin and the radar absorbing skin, so that the camouflage system can maintain concealment in a variety of environments, overcoming the limitations of traditional camouflage technology; by setting the square resistance of the infrared shielding skin in the range of 5-15Ω / sq, it can effectively shield infrared radiation, and the square resistance of the radar absorbing skin is set in the range of 50-150Ω / sq, ensuring that it can effectively absorb radar waves and reduce echo signals, thereby improving the stealth effect; through the precise selection and design of the materials and square resistance of the infrared shielding skin and the radar absorbing skin, the pixelated thermally driven environmental adaptive camouflage system in the present invention can achieve multi-band stealth effects.

[0015] As a preferred solution, the thickness of the first medium and the second medium is 0.5-3 mm, and the first medium and the second medium are made of one or more materials selected from the group consisting of polyethylene terephthalate, polymethyl methacrylate, polyimide, polydimethylsiloxane and sodium lime glass.

[0016] Compared with the prior art, the above technical solution can effectively adjust the absorption and reflection characteristics of the material to electromagnetic waves of different wavelengths through appropriate thickness design (0.5-3mm), thereby optimizing the stealth effect, and ensuring that the material maintains good light transmittance and wave absorption ability while minimizing the weight, thereby improving the flexibility and practicality of the system; through the material selection of the first medium and the second medium (such as polyethylene terephthalate, polymethyl methacrylate, etc.) with good optical transmittance, high temperature resistance and good mechanical strength, these characteristics ensure the stability of the dielectric layer under various environmental conditions, and ensure that it has excellent stealth effects under optical, infrared and radar detection.

[0017] As a preferred solution, the heating plate is made of one or more materials selected from graphene, silica gel, semiconductor and ceramic.

[0018] As a preferred solution, the temperature sensor is one of a thermocouple, a resistance temperature detector and a thermistor.

[0019] Compared with the existing technology, the above technical solution can adapt to different application scenarios by flexibly selecting the material of the heating sheet. The graphene heating sheet has an ultra-thin thickness and good thermal conductivity, and is used in application scenarios where the installation space is small and requires rapid response; the silicone heating sheet provides good flexibility to ensure the fit of complex curved surfaces; the semiconductor heating sheet has the ability to heat up and cool down at the same time, making it suitable for environments with drastic changes in ambient temperature; and the ceramic heating sheet helps to enhance the overall strength to resist strong external impacts. By designing corresponding heating systems for different background environments, the environmental adaptability of the pixelated thermally driven environmental adaptive camouflage system can be significantly improved, and sufficient robustness can be maintained.

[0020] As a preferred solution, the method for preparing the environmental camouflage skin includes:

[0021] S1. Select the color type and color change temperature of the thermochromic capsule according to the background environment and actual temperature to be simulated;

[0022] S2. The polydimethylsiloxane and SE1700 curing agent are stirred in a mass ratio of 10:1 to prepare a glue, and the glue is mixed with the thermochromic capsules to obtain a mixture, wherein the mass ratio of the thermochromic capsules to the glue is (5-10): 1;

[0023] S3. The mixture in step S2 is placed in a vacuum environment, and the vacuum degree of the vacuum environment is less than 3.0×10 -3 Pa, let it stand to remove bubbles and then take it out to obtain ink;

[0024] S4. Fixing the heating sheet on the screen printer, then pouring the ink in step S3 on one end of the screen, and then applying it to the heating sheet;

[0025] S5. After the coating in step S4 is completed, the heating sheet is vacuum cured to solidify the ink, and the environmental camouflage skin is obtained after cutting.

[0026] Compared with the prior art, the above technical solution can significantly improve the performance and adaptability of the environmental camouflage skin. The specific advantages include: efficient color change ability: through the combination of thermochromic capsules and polydimethylsiloxane, the environmental camouflage skin can respond quickly at different temperatures and quickly change color to adapt to the environmental background, thereby improving the effectiveness of camouflage; excellent adhesion and durability: the preparation method of the glue ensures good adhesion between the thermochromic material and the substrate, enhances the durability and anti-peeling performance of the skin, and adapts to a variety of complex environments; application of vacuum treatment: by removing bubbles in a vacuum environment, the uniformity and stability of the ink are ensured, and the bubble defects that may occur during subsequent use are avoided, further improving the product quality; through the above preparation method, the environmental camouflage skin of the present invention can maintain excellent camouflage performance under variable environmental conditions. Specifically, the rapid color change and high environmental adaptability enable the camouflage system to effectively hide the target under a complex background and enhance its concealment. Compared with the prior art, it has achieved significant improvements in camouflage effect and material performance, meeting the high requirements for concealment technology.

[0027] As a preferred solution, in step S3, the standing time is more than 30 minutes; in step S5, the curing condition is: curing at 80° C. for more than 3 hours.

[0028] Compared with the existing technology, the above-mentioned technical scheme ensures that the surface of the environmental camouflage skin is smooth and uniform through sufficient standing time and appropriate curing conditions, and has good visual effects and performance stability. The enhanced bonding strength and material stability enable the environmental camouflage skin to maintain efficient camouflage effects under various temperatures and humidity, adapt to various complex environments, and greatly enhance its practicality and reliability in complex environments.

[0029] As a preferred solution, the method for preparing the infrared shielding skin and the radar absorbing skin comprises:

[0030] A1: Prepare a first medium and a second medium, and deposit ITO thin films on the first medium and the second medium respectively by using a magnetron sputtering process to prepare infrared shielding films with a square resistance of 5-15Ω / sq and radar absorbing films with a square resistance of 50-150Ω / sq, and prepare infrared shielding skins and radar absorbing skins respectively;

[0031] A2: bonding the infrared shielding film and the radar absorbing film processed in step A1 to the glass substrate respectively, and spin coating photoresist on the corresponding ITO film;

[0032] A3: After installing the mask, the ITO film treated in step A2 is exposed to light, and then developed to form a desired pattern;

[0033] A4: performing a vertical film process and wet etching on the ITO film processed in step A3 to form a pattern of a specific shape, wherein the pattern includes a square and a circle;

[0034] A5: removing the excess photoresist on the surface of the ITO film after the treatment in step A4, removing the treated ITO film from the glass substrate, cleaning and drying it, cutting and splicing the ITO film according to the required size, and respectively preparing an infrared shielding film and a radar absorbing film.

[0035] Compared with the prior art, the above technical scheme can significantly improve the performance and manufacturing efficiency of infrared shielding skin and radar absorbing skin. By depositing ITO films with different square resistances on the same substrate through magnetron sputtering process, the dual functions of infrared shielding and radar absorption can be realized simultaneously, meeting the requirements of modern concealment technology for multi-spectral performance. By combining the preparation steps of infrared shielding film and radar absorbing film, the manufacturing process is simplified, the required equipment and time are reduced, and the production efficiency is improved. The prepared infrared shielding film and radar absorbing film have suitable square resistances (5-15Ω / sq and 50-150Ω / sq), respectively, ensuring that they provide excellent absorption and reflection properties within the corresponding frequency range. Through the development and wet etching steps, the obtained pattern is precise, which can effectively improve the performance and adaptability of the material in application.

[0036] Another technical problem to be solved by the present invention is to provide an application of the pixelated thermally driven environment adaptive camouflage system to solve the problems of poor multi-spectral camouflage effect and poor adaptability in the prior art. Traditional camouflage systems often rely on fixed colors and patterns and cannot quickly adapt to changing environments, resulting in limited camouflage effects, especially in complex backgrounds.

[0037] The present invention also provides an application of the pixelated thermally driven environment adaptive camouflage system, and the application includes using the pixelated thermally driven environment adaptive camouflage system for adaptive camouflage.

[0038] Compared with the prior art, the application of a pixelated thermally driven environmental adaptive camouflage system in the present application has the following advantages: the static camouflage method in the prior art is changed to a dynamic adaptive camouflage method, and through the real-time feedback and control of the system, it can effectively cope with changing environmental conditions and improve the concealment effect; the background information is obtained through the environmental recognition module, and the precise control of the heating plate and the environmental camouflage skin by the control drive unit is combined to ensure that its color and temperature changes match the environment; the system in the present invention can achieve fast and flexible environmental adaptability, so that the camouflaged object always maintains good concealment in a complex environment; at the same time, the technical problems mentioned in the background technology part are solved, especially in the face of the increasing challenges of modern military and monitoring technologies, providing a more effective camouflage method to meet the high requirements in practical applications. The pixelated thermally driven environmental adaptive camouflage system provided by the present invention can show better performance in practical applications, improve the safety of operators and the success rate of tasks, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The working principle and structural diagram of the pixelated thermally driven environment adaptive camouflage system;

[0040] Figure 2 This is the module framework diagram of FPGA;

[0041] Figure 3 It is the working flow diagram of the heat drive system;

[0042] Figure 4 The structural dimensions of the infrared shielding skin, radar absorbing skin, heating sheet and environmental camouflage skin;

[0043] Figure 5 The color comparison diagram of the temperature-changing capsule in Example 1 before and after color adjustment;

[0044] Figure 6 This is a diagram of the preparation process of the infrared shielding skin;

[0045] Figure 7 This is a diagram showing the stealth effect of the adaptive camouflage system in Example 1 in a complex background environment;

[0046] Figure 8 This is a diagram showing the infrared shielding effect of the adaptive camouflage system in Example 1;

[0047] Fig. 9 This is a diagram of the radar absorption performance of the adaptive camouflage system in Example 1. DETAILED DESCRIPTION

[0048] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0049] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0050] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] The present invention provides a pixelated thermally driven environment adaptive camouflage system, comprising an environment recognition module and an adaptive camouflage module, wherein the environment recognition module is used to collect an environment background image and generate a camouflage control signal; the adaptive camouflage module comprises a control drive unit and a basic working unit, wherein the control drive unit is used to receive the camouflage control signal generated by the environment recognition module and process the control signal;

[0052] The basic working unit comprises an infrared shielding skin, a first medium, a radar absorbing skin, a second medium, an environmental camouflage skin, a heating sheet and a temperature sensor which are stacked in sequence from top to bottom;

[0053] The environmental camouflage skin is prepared by mixing functional polymer materials with thermochromic capsules.

[0054] As a preferred solution, the functional polymer material includes one or more of polydimethylsiloxane, polyurethane resin, fluorocarbon resin and epoxy resin.

[0055] As a preferred solution, the infrared shielding skin and the radar absorbing skin are both composed of one or more materials selected from indium tin oxide, antimony tin oxide or aluminum-doped zinc oxide, and the square resistance of the infrared shielding skin is 5-15Ω / sq, and the square resistance of the radar absorbing skin is 50-150Ω / sq.

[0056] As a preferred solution, the thickness of the first medium and the second medium is 0.5-3 mm, and the first medium and the second medium are made of one or more materials selected from the group consisting of polyethylene terephthalate, polymethyl methacrylate, polyimide, polydimethylsiloxane and sodium lime glass.

[0057] As a preferred solution, the heating plate is made of one or more materials selected from graphene, silica gel, semiconductor and ceramic.

[0058] As a preferred solution, the temperature sensor is one of a thermocouple, a resistance temperature detector and a thermistor.

[0059] As a preferred solution, the method for preparing the environmental camouflage skin includes:

[0060] S1. Select the color type and color change temperature of the thermochromic capsule according to the background environment and actual temperature to be simulated;

[0061] S2. The polydimethylsiloxane and SE1700 curing agent are stirred in a mass ratio of 10:1 to prepare a glue, and the glue is mixed with the thermochromic capsules to obtain a mixture, wherein the mass ratio of the thermochromic capsules to the glue is (5-10): 1;

[0062] S3. The mixture in step S2 is placed in a vacuum environment, and the vacuum degree of the vacuum environment is less than 3.0×10 -3 Pa, let it stand to remove bubbles and then take it out to obtain ink;

[0063] S4. Fixing the heating sheet on the screen printer, then pouring the ink in step S3 on one end of the screen, and then applying it to the heating sheet;

[0064] S5. After the coating in step S4 is completed, the heating sheet is vacuum cured to solidify the ink, and the environmental camouflage skin is obtained after cutting.

[0065] As a preferred solution, in step S3, the standing time is more than 30 minutes; in step S5, the curing condition is: curing at 80° C. for more than 3 hours.

[0066] As a preferred solution, the method for preparing the infrared shielding skin and the radar absorbing skin comprises:

[0067] A1: Prepare a first medium and a second medium, and deposit ITO thin films on the first medium and the second medium respectively by using a magnetron sputtering process to prepare infrared shielding films with a square resistance of 5-15Ω / sq and radar absorbing films with a square resistance of 50-150Ω / sq, and prepare infrared shielding skins and radar absorbing skins respectively;

[0068] A2: bonding the infrared shielding film and the radar absorbing film processed in step A1 to the glass substrate respectively, and spin coating photoresist on the corresponding ITO film;

[0069] A3: After installing the mask, the ITO film treated in step A2 is exposed to light, and then developed to form a desired pattern;

[0070] A4: performing a vertical film process and wet etching on the ITO film processed in step A3 to form a pattern of a specific shape, wherein the pattern includes a square and a circle;

[0071] A5: removing the excess photoresist on the surface of the ITO film after the treatment in step A4, removing the treated ITO film from the glass substrate, cleaning and drying it, cutting and splicing the ITO film according to the required size, and respectively preparing an infrared shielding film and a radar absorbing film.

[0072] The present invention also provides an application of the pixelated thermally driven environment adaptive camouflage system, and the application includes using the pixelated thermally driven environment adaptive camouflage system for adaptive camouflage.

[0073] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0074] Embodiment 1:

[0075] Embodiment 1 provides a set of embodiments including specific equipment and working processes to more comprehensively expand and explain the above-summarized technical solution of the present invention:

[0076] The pixelated heat-driven environment adaptive camouflage system proposed in this embodiment refers to Figure 1 As shown, the pixelated thermally driven environment adaptive camouflage system includes an environment recognition module and an adaptive camouflage module.

[0077] The environment recognition module is composed of a CMOS camera and a Linux development board, wherein the CMOS camera is Daheng MER2-503-36U3C, and the Linux development board is ASUS tinkerboard 2s.

[0078] The workflow of the environment recognition module includes:

[0079] Use a Linux operating system-based development board as the main control of the system, connect and call the CMOS camera, adjust the camera parameters and obtain real-time images; process the image, convert the RGB image into a "0-1" logic matrix, and encode the logic matrix and convert it into a byte stream; call the serial port, establish communication with the lower computer, and transmit the byte stream to the lower computer.

[0080] The adaptive camouflage module is composed of FPGA, 74HC595, power supply, voltage reducer and a basic working unit.

[0081] The FPGA mainly realizes the temperature data readback function, serial port 485 function, control logic function and shift register function. Its module framework diagram is shown in the attached figure. Figure 2 shown.

[0082] The temperature data readback function uses the IIC (integrated circuit bus) interface to implement a communication protocol in the format of device address + register address + data. First, the device address is set to poll from 0 to 31 to ensure that the device communicating with the register can be correctly found, and the read-back data address is added by 1; secondly, data is written to the 01 register of the temperature sensor to implement the function of configuring the temperature sensor mode, including measurement accuracy, power consumption mode, alarm threshold, etc., to ensure that the sensor operates in the expected working mode; finally, the data in the 00 register is read. This data is the current temperature value, expressed in the form of binary complement.

[0083] The serial port 485 function uses UART (Universal Asynchronous Receiver / Transmitter) to achieve reliable data transmission between FPGA and the host Linux development board, defines the data frame format: device address + temperature threshold + 576-way switch, and clarifies the structure and sequence of data transmission between FPGA and the host computer. Its workflow is that the host computer sends a data frame, the FPGA segment implements the data acquisition and storage function, writes values ​​to the corresponding registers, and then the FPGA can perform corresponding actions according to the values ​​in these registers.

[0084] The control logic function is to compare the data sent by the host computer with the data read back by the IIC to determine whether the temperature data of the current corresponding path reaches the set temperature threshold. If it reaches, the switch is closed, and if it does not reach, the switch is opened.

[0085] The shift register function is to realize the shift function of 32-bit data through 4 shift registers. The specific process is as follows: receiving the 32-bit data and enable signal input by the software, outputting the 32-bit data bit by bit according to the shift clock (shift_clk), the shift register sequentially transfers the input data bit by bit to the next level register according to the clock signal, until the shift transmission of the 32-bit data is completed, when the 32-bit data is shifted, the data is latched to the output register through the latch clock (latch_clk), ensuring that the data can be stably stored and subsequently processed after the shift is completed, and finally realizing the conversion of 32-bit serial data to parallel data.

[0086] The power supply is 24V. Due to the large current, three 35V direct-plug aluminum electrolytic capacitors are used to filter the ripple, and a transient voltage suppression diode (TVS) is added to offset the impact of surges. At the same time, two buck modules convert to 3.3V respectively, one 3.3V for FPGA and the other 3.3V for the temperature sensor.

[0087] The basic working unit includes, from top to bottom, an infrared shielding skin, a first medium, a radar absorbing skin, a first medium, an environmental camouflage skin, a heating plate, and a temperature sensor at the bottom.

[0088] The structural dimensions of the infrared shielding skin, radar absorbing skin, heating plate and environmental camouflage skin are as shown in the attached Figure 4 As shown, the infrared shielding skin uses a square resistance of 5Ω / sq, and the specific dimensions are as follows: m=0.23mm, n=0.02mm; the radar absorbing skin uses a square resistance of 80Ω / sq, and the specific dimensions are as follows: R=11.4mm, c=0.6mm; the dimensions of the heating plate are as follows: d=20mm, a=6mm, b=1mm; the light-colored area in the heating plate image is the electrode, and the size of the environmental camouflage skin is equal to the dark-colored area in the heating plate, and the thickness is 0.2mm.

[0089] The preparation process of the environmental camouflage skin is as follows:

[0090] S1. Select the color type and color change temperature of the thermochromic capsule according to the background environment and actual temperature to be simulated;

[0091] S2. The polydimethylsiloxane PDMS and SE1700 curing agent were mixed in a mass ratio of 10:1 to form a glue, and then the glue and the thermochromic capsule were mixed in a mass ratio of 9:1;

[0092] S3. Place the ink in S2 in an internal vacuum machine, and then evacuate the vacuum chamber to a vacuum degree of <3.0×10-3Pa, let it stand for 30 minutes to remove bubbles, and then take it out;

[0093] S4. Fix the whole heating sheet on the screen printer, then install the screen plate on the frame of the printer, and align the alignment marks; adjust the angle and pressure of the scraper, pour the ink in S3 evenly on one end of the screen, and then use the scraper to evenly scrape;

[0094] S5. After printing is completed, take out the entire heating sheet and put it into a vacuum drying oven, cure it at 80°C for 3 hours and then take it out; cut the heating sheet covered with the thermochromic layer into small pieces of 1 cm×1 cm, and the preparation is completed.

[0095] The preparation process of the infrared shielding skin is as shown in the attached Figure 6 As shown:

[0096] The preparation method of the infrared shielding skin and the radar absorbing skin comprises:

[0097] A1. ITO was deposited on a PET substrate using a magnetron sputtering process to prepare ITO films with a square resistance of 5Ω / sq and 80Ω / sq, wherein the 80Ω / sq ITO film was the raw material for the radar absorbing skin, and the 5Ω / sq ITO film was the raw material for the infrared shielding skin;

[0098] A2. Temporarily bond the ITO film to a glass substrate slightly larger than the film size to ensure surface flatness during the photolithography process; spin-coat positive resist EPI680 on the ITO film at a speed of 1200r / min;

[0099] A3. After installing the mask, expose the ITO film and develop it after exposure;

[0100] A4. After the ITO film is subjected to a vertical film process, TE-100 is used for wet etching to obtain a square pattern and a circle pattern;

[0101] A5. Use acetone solution to remove excess photoresist on the surface, remove the ITO film from the glass, and clean and dry it; cut and splice it according to the required size; and obtain infrared shielding film and radar absorbing film respectively.

[0102] In Example 1, the simulated environment is a dark green forest scene and a khaki desert scene. The selection and quality ratio of the temperature-changing capsules are as follows: 45°C changes from turquoise to bright yellow capsules: 45°C changes from black to pure white capsules: 45°C changes from pure white to red capsules: 45°C changes from pure white to black capsules = 10:6:6:1. The color comparison before and after color adjustment is shown in the figure below. Figure 5 shown.

[0103] In Example 1, the overall workflow of the pixelated thermally driven environment adaptive camouflage system is as follows:

[0104] The basic working unit of this embodiment adopts a vertical stacking structure, which includes, from top to bottom, an infrared shielding skin, a first medium, a radar absorbing skin, a second medium, an environmental camouflage skin, a heating plate, and a temperature sensor at the bottom;

[0105] Among them, the infrared shielding layer realizes infrared camouflage by suppressing the emission of its own infrared waves and the input of external infrared waves;

[0106] The radar absorption layer uses a wave-absorbing metasurface to achieve radar camouflage;

[0107] The environmental camouflage skin uses a heating plate to drive the thermochromic material to fit the background environment to achieve visual camouflage.

[0108] The working process of the heat drive system in the entire embodiment 1 is as shown in the attached figure. Figure 3 As shown: First, the camera is materialized, the camera parameters and serial port are initialized, and then the background image is obtained through the camera and transmitted to the Linux development board for image processing and segmentation and reorganization of the logic matrix, and the byte stream is transmitted to the lower computer FPGA. FPGA uses 74HC595 to control the power supply of the heating plate according to the instructions and the real-time temperature of each unit, thereby adjusting the color change of the environmental camouflage skin.

[0109] The pixelated heat-driven environment adaptive camouflage system of the above embodiment of the present invention was tested for adaptive camouflage performance of visible light stealth performance, infrared shielding performance and radar absorbing performance. The test results are as follows:

[0110] Visible light stealth performance:

[0111] The stealth effects of pixel adaptive camouflage system and large area camouflage system in complex background environment are shown in the attached figure. Figure 7 As shown, it can be observed that the pixelated adaptive camouflage system has better stealth effect in complex background environments.

[0112] Infrared shielding performance:

[0113] The infrared shielding performance is measured by an infrared thermal imager, and it can maintain excellent infrared shielding effect for a long time at high temperature. Figure 8 shown.

[0114] Radar absorbing performance:

[0115] The radar absorption performance is measured using the bow method, and the absorption rate is more than 90% in the range of 8.21 to 31.76 GHz. Fig. 9 shown.

[0116] Embodiment 2:

[0117] Embodiment 2 provides an expanded description of the above-mentioned general technical solution of the present invention, including:

[0118] A pixelated thermally driven environment adaptive camouflage system, comprising an environment recognition module and an adaptive camouflage module, wherein the environment recognition module is used to collect an environment background image and generate a camouflage control signal; the adaptive camouflage module comprises a control drive unit and a basic working unit, wherein the control drive unit is used to receive the camouflage control signal generated by the environment recognition module and process the control signal;

[0119] The basic working unit comprises an infrared shielding skin, a first medium, a radar absorbing skin, a second medium, an environmental camouflage skin, a heating sheet and a temperature sensor which are stacked in sequence from top to bottom;

[0120] The environmental camouflage skin is prepared by mixing a functional polymer material with a thermochromic capsule, wherein the functional polymer material is polydimethylsiloxane;

[0121] The infrared shielding skin and the radar absorbing skin are both made of indium tin oxide, and the square resistance of the infrared shielding skin is 5Ω / sq, and the square resistance of the radar absorbing skin is 50Ω / sq.

[0122] The thickness of the first medium and the second medium is 0.5 mm, and the material of the first medium and the second medium is polyethylene terephthalate;

[0123] The heating plate is made of graphene material; the temperature sensor is a thermocouple;

[0124] The method for preparing the environmental camouflage skin comprises:

[0125] S1. Select the color type and color change temperature of the thermochromic capsule according to the background environment and actual temperature to be simulated;

[0126] S2. The polydimethylsiloxane and SE1700 curing agent are stirred in a mass ratio of 10:1 to prepare a glue, and the glue is mixed with the thermochromic capsules to obtain a mixture, wherein the mass ratio of the thermochromic capsules to the glue is 5:1;

[0127] S3. The mixture in step S2 is placed in a vacuum environment, and the vacuum degree of the vacuum environment is less than 3.0×10 -3 Pa, let it stand for more than 30 minutes to remove bubbles, then take it out to obtain ink;

[0128] S4. Fixing the heating sheet on the screen printer, then pouring the ink in step S3 on one end of the screen, and then applying it to the heating sheet;

[0129] S5. After the coating in step S4 is completed, the heating plate is vacuum cured to solidify the ink, and the curing is performed at 80° C. for more than 3 hours. After cutting, the environmental camouflage skin is obtained.

[0130] The preparation method of the infrared shielding skin and the radar absorbing skin comprises:

[0131] A1: Prepare a first medium and a second medium, and deposit ITO thin films on the first medium and the second medium respectively by using a magnetron sputtering process to prepare an infrared shielding film with a square resistance of 5Ω / sq and a radar absorbing film with a square resistance of 70Ω / sq, and prepare an infrared shielding skin and a radar absorbing skin respectively;

[0132] A2: bonding the infrared shielding film and the radar absorbing film processed in step A1 to the glass substrate respectively, and spin coating photoresist on the corresponding ITO film;

[0133] A3: After installing the mask, the ITO film treated in step A2 is exposed to light, and then developed to form a desired pattern;

[0134] A4: performing a vertical film process and wet etching on the ITO film processed in step A3 to form a pattern of a specific shape, wherein the pattern includes a square and a circle;

[0135] A5: removing the excess photoresist on the surface of the ITO film after the treatment in step A4, removing the treated ITO film from the glass substrate, cleaning and drying it, cutting and splicing the ITO film according to the required size, and respectively preparing an infrared shielding film and a radar absorbing film.

[0136] This embodiment also provides an application of a pixelated thermally driven environment adaptive camouflage system, and the application includes using the pixelated thermally driven environment adaptive camouflage system for adaptive camouflage.

[0137] Embodiment 3:

[0138] Embodiment 3 provides an expanded description of the above-mentioned general technical solution of the present invention, including:

[0139] A pixelated thermally driven environment adaptive camouflage system, comprising an environment recognition module and an adaptive camouflage module, wherein the environment recognition module is used to collect an environment background image and generate a camouflage control signal; the adaptive camouflage module comprises a control drive unit and a basic working unit, wherein the control drive unit is used to receive the camouflage control signal generated by the environment recognition module and process the control signal;

[0140] The basic working unit comprises an infrared shielding skin, a first medium, a radar absorbing skin, a second medium, an environmental camouflage skin, a heating sheet and a temperature sensor which are stacked in sequence from top to bottom;

[0141] The environmental camouflage skin is made by mixing functional polymer materials and thermochromic capsules, and the functional polymer materials are made by mixing polydimethylsiloxane, polyurethane resin, fluorocarbon resin and epoxy resin;

[0142] The infrared shielding skin and the radar absorbing skin are both made of one or more materials selected from indium tin oxide, antimony tin oxide or aluminum-doped zinc oxide, and the square resistance of the infrared shielding skin is 15Ω / sq, and the square resistance of the radar absorbing skin is 150Ω / sq.

[0143] The thickness of the first medium and the second medium is 3 mm, and the first medium and the second medium are made of a material mixed with polyethylene terephthalate, polymethyl methacrylate, polyimide, polydimethylsiloxane and sodium lime glass;

[0144] The heating sheet is made of a mixed material of graphene, silica gel, semiconductor and ceramic; the temperature sensor is a thermistor;

[0145] The method for preparing the environmental camouflage skin comprises:

[0146] S1. Select the color type and color change temperature of the thermochromic capsule according to the background environment and actual temperature to be simulated;

[0147] S2. The polydimethylsiloxane and SE1700 curing agent are stirred in a mass ratio of 10:1 to prepare a glue, and the glue is mixed with the thermochromic capsules to obtain a mixture, wherein the mass ratio of the thermochromic capsules to the glue is 10:1;

[0148] S3. The mixture in step S2 is placed in a vacuum environment, and the vacuum degree of the vacuum environment is less than 3.0×10 -3 Pa, let it stand for more than 30 minutes to remove bubbles, then take it out to obtain ink;

[0149] S4. Fixing the heating sheet on the screen printer, then pouring the ink in step S3 on one end of the screen, and then applying it to the heating sheet;

[0150] S5. After the coating in step S4 is completed, the heating plate is vacuum cured to solidify the ink, and the curing is performed at 80° C. for more than 3 hours. After cutting, the environmental camouflage skin is obtained.

[0151] The preparation method of the infrared shielding skin and the radar absorbing skin comprises:

[0152] A1: Prepare a first medium and a second medium, and deposit ITO thin films on the first medium and the second medium respectively by using a magnetron sputtering process to prepare an infrared shielding film with a square resistance of 15Ω / sq and a radar absorbing film with a square resistance of 90Ω / sq, and prepare an infrared shielding skin and a radar absorbing skin respectively;

[0153] A2: bonding the infrared shielding film and the radar absorbing film processed in step A1 to the glass substrate respectively, and spin coating photoresist on the corresponding ITO film;

[0154] A3: After installing the mask, the ITO film treated in step A2 is exposed to light, and then developed to form a desired pattern;

[0155] A4: performing a vertical film process and wet etching on the ITO film processed in step A3 to form a pattern of a specific shape, wherein the pattern includes a square and a circle;

[0156] A5: removing the excess photoresist on the surface of the ITO film after the treatment in step A4, removing the treated ITO film from the glass substrate, cleaning and drying it, cutting and splicing the ITO film according to the required size, and respectively preparing an infrared shielding film and a radar absorbing film.

[0157] This embodiment also provides an application of a pixelated thermally driven environment adaptive camouflage system, and the application includes using the pixelated thermally driven environment adaptive camouflage system for adaptive camouflage.

[0158] Embodiment 4:

[0159] Embodiment 4 provides an expanded description of the above-mentioned general technical solution of the present invention, including:

[0160] A pixelated thermally driven environment adaptive camouflage system, comprising an environment recognition module and an adaptive camouflage module, wherein the environment recognition module is used to collect an environment background image and generate a camouflage control signal; the adaptive camouflage module comprises a control drive unit and a basic working unit, wherein the control drive unit is used to receive the camouflage control signal generated by the environment recognition module and process the control signal;

[0161] The basic working unit comprises an infrared shielding skin, a first medium, a radar absorbing skin, a second medium, an environmental camouflage skin, a heating sheet and a temperature sensor which are stacked in sequence from top to bottom;

[0162] The environmental camouflage skin is prepared by mixing a functional polymer material with a thermochromic capsule, wherein the functional polymer material is an epoxy resin;

[0163] The infrared shielding skin and the radar absorbing skin are both made of aluminum-doped zinc oxide, and the square resistance of the infrared shielding skin is 10Ω / sq, and the square resistance of the radar absorbing skin is 100Ω / sq.

[0164] The thickness of the first medium and the second medium is 2 mm, and the first medium and the second medium are made of sodium-lime glass;

[0165] The heating plate is made of ceramic material; the temperature sensor is a resistance temperature detector;

[0166] The method for preparing the environmental camouflage skin comprises:

[0167] S1. Select the color type and color change temperature of the thermochromic capsule according to the background environment and actual temperature to be simulated;

[0168] S2. The polydimethylsiloxane and SE1700 curing agent are stirred at a mass ratio of 10:1 to prepare glue, and the glue is mixed with the thermochromic capsules to obtain a mixture, wherein the mass ratio of the thermochromic capsules to the glue is 7.5:1;

[0169] S3. The mixture in step S2 is placed in a vacuum environment, and the vacuum degree of the vacuum environment is less than 3.0×10 -3 Pa, let it stand for more than 30 minutes to remove bubbles, then take it out to obtain ink;

[0170] S4. Fixing the heating sheet on the screen printer, then pouring the ink in step S3 on one end of the screen, and then applying it to the heating sheet;

[0171] S5. After the coating in step S4 is completed, the heating plate is vacuum cured to solidify the ink, and the curing is performed at 80° C. for more than 3 hours. After cutting, the environmental camouflage skin is obtained.

[0172] The preparation method of the infrared shielding skin and the radar absorbing skin comprises:

[0173] A1: Prepare a first medium and a second medium, and deposit ITO thin films on the first medium and the second medium respectively by using a magnetron sputtering process to prepare infrared shielding films with a square resistance of 5-15Ω / sq and radar absorbing films with a square resistance of 70-90Ω / sq, and prepare infrared shielding skins and radar absorbing skins respectively;

[0174] A2: bonding the infrared shielding film and the radar absorbing film processed in step A1 to the glass substrate respectively, and spin coating photoresist on the corresponding ITO film;

[0175] A3: After installing the mask, the ITO film treated in step A2 is exposed to light, and then developed to form a desired pattern;

[0176] A4: performing a vertical film process and wet etching on the ITO film processed in step A3 to form a pattern of a specific shape, wherein the pattern includes a square and a circle;

[0177] A5: removing the excess photoresist on the surface of the ITO film after the treatment in step A4, removing the treated ITO film from the glass substrate, cleaning and drying it, cutting and splicing the ITO film according to the required size, and respectively preparing an infrared shielding film and a radar absorbing film.

[0178] This embodiment also provides an application of a pixelated thermally driven environment adaptive camouflage system, and the application includes using the pixelated thermally driven environment adaptive camouflage system for adaptive camouflage.

[0179] Through the above embodiments and the technical scheme of the present invention, it is further explained that the present invention provides a pixelated thermally driven environment adaptive camouflage system and its application. The creativity of the system lies in that it integrates an environment recognition module and an adaptive camouflage module, which can monitor the environmental background in real time and automatically adjust the camouflage effect, thereby significantly improving the dynamic adaptability and concealment performance of the camouflage system; the present invention achieves multiple technical advantages. First, the system is modularly designed to make each functional unit clear and easy to integrate and maintain, and at the same time, it can be flexibly adjusted according to actual needs. Secondly, the infrared shielding skin and radar absorption skin materials used, by optimizing the square resistance design, effectively improve the concealment of the system under multi-band detection, and solve the problem that traditional camouflage technology is not adaptable enough to complex background environments; in addition, the environmental camouflage skin combines thermochromic capsules with polymer materials to ensure rapid response color changes at different ambient temperatures, further improving the realism and reliability of the camouflage effect. The overall design of the system not only meets the high requirements of modern military for concealment technology, but also provides new ideas and directions for the development of future camouflage technology. Through the implementation of the present invention, it can effectively cope with the challenges brought by modern monitoring technology and show a wide range of application potential.

[0180] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0181] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0182] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A pixelated thermally driven environment-adaptive camouflage system, characterized in that: It includes an environment recognition module and an adaptive camouflage module, wherein the environment recognition module is used to collect an environment background image and generate a camouflage control signal; the adaptive camouflage module includes a control drive unit and a basic working unit, wherein the control drive unit is used to receive the camouflage control signal generated by the environment recognition module and process the control signal; The basic working unit comprises an infrared shielding skin, a first medium, a radar absorbing skin, a second medium, an environmental camouflage skin, a heating sheet and a temperature sensor which are stacked in sequence from top to bottom; The environmental camouflage skin is prepared by mixing functional polymer materials with thermochromic capsules.

2. The pixelated thermally driven environment adaptive camouflage system according to claim 1, characterized in that: The functional polymer material includes one or more of polydimethylsiloxane, polyurethane resin, fluorocarbon resin and epoxy resin.

3. The pixelated thermally driven environment adaptive camouflage system according to claim 1, characterized in that: The infrared shielding skin and the radar absorbing skin are both made of one or more materials selected from indium tin oxide, antimony tin oxide or aluminum-doped zinc oxide, and the square resistance of the infrared shielding skin is 5-15Ω / sq, and the square resistance of the radar absorbing skin is 50-150Ω / sq.

4. The pixelated thermally driven environment adaptive camouflage system according to claim 1, characterized in that: The thickness of the first medium and the second medium is 0.5-3 mm, and the first medium and the second medium are made of one or more materials selected from the group consisting of polyethylene terephthalate, polymethyl methacrylate, polyimide, polydimethylsiloxane and sodium lime glass.

5. The pixelated thermally driven environment adaptive camouflage system according to claim 1, characterized in that: The heating plate is made of one or more materials selected from graphene, silica gel, semiconductor and ceramic.

6. The pixelated thermally driven environment adaptive camouflage system according to claim 1, characterized in that: The temperature sensor is one of a thermocouple, a resistance temperature detector and a thermistor.

7. The pixelated thermally driven environment adaptive camouflage system according to claim 1, characterized in that: The method for preparing the environmental camouflage skin comprises: S1. Select the color type and color change temperature of the thermochromic capsule according to the background environment and actual temperature to be simulated; S2. The polydimethylsiloxane and SE1700 curing agent are stirred in a mass ratio of 10:1 to prepare a glue, and the glue is mixed with the thermochromic capsules to obtain a mixture, wherein the mass ratio of the thermochromic capsules to the glue is (5-10): 1; S3. The mixture in step S2 is placed in a vacuum environment, and the vacuum degree of the vacuum environment is less than 3.0×10 -3 Pa, let it stand to remove bubbles and then take it out to obtain ink; S4. Fixing the heating sheet on the screen printer, then pouring the ink in step S3 on one end of the screen, and then applying it to the heating sheet; S5. After the coating in step S4 is completed, the heating sheet is vacuum cured to solidify the ink, and the environmental camouflage skin is obtained after cutting.

8. The pixelated thermally driven environment adaptive camouflage system according to claim 7, characterized in that: In the step S3, the standing time is more than 30 minutes; in the step S5, the curing condition is: curing at 80° C. for more than 3 hours.

9. The pixelated thermally driven environment adaptive camouflage system according to claim 1, characterized in that: The preparation method of the infrared shielding skin and the radar absorbing skin comprises: A1: Prepare a first medium and a second medium, and deposit ITO thin films on the first medium and the second medium respectively by using a magnetron sputtering process to prepare infrared shielding films with a square resistance of 5-15Ω / sq and radar absorbing films with a square resistance of 50-150Ω / sq, and prepare infrared shielding skins and radar absorbing skins respectively; A2: bonding the infrared shielding film and the radar absorbing film processed in step A1 to the glass substrate respectively, and spin coating photoresist on the corresponding ITO film; A3: After installing the mask, the ITO film treated in step A2 is exposed to light, and then developed to form a desired pattern; A4: performing a vertical film process and wet etching on the ITO film processed in step A3 to form a pattern of a specific shape, wherein the pattern includes a square and a circle; A5: removing the excess photoresist on the surface of the ITO film after the treatment in step A4, removing the treated ITO film from the glass substrate, cleaning and drying it, cutting and splicing the ITO film according to the required size, and respectively preparing an infrared shielding film and a radar absorbing film.

10. An application of a pixelated thermally driven environment adaptive camouflage system according to any one of claims 1 to 9, characterized in that: The application includes using the pixelated thermally driven environment adaptive camouflage system for adaptive camouflage.

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