Rapid color-changing chameleon-imitating device

Abstract

The invention provides a fast color-changing chameleon-imitating device. The device comprises a color sensor, a control unit, a voltage and current monitoring module, a PWM-to-voltage module and a color-changing layer. The color sensor is used for detecting the RGB value of the surrounding environment in real time, determining the target voltage corresponding to the RGB value and sending the target voltage to the control unit. The voltage and current monitoring module is used for monitoring the real-time voltage of the device in real time and sending the real-time voltage to the control unit; the control unit is used for adjusting the output voltage of the PWM-to-voltage module based on the difference value between the received target voltage and the actual voltage; the PWM-to-voltage module is used for adjusting the output voltage of the color changing layer in response to a control instruction sent by the control unit so as to maintain the balance between the target voltage and the real-time voltage; the color changing layer comprises tungsten oxide with the particle size not exceeding 100 nm and a lithium ion doping agent.

Description

Technical Field

[0001] The invention relates to the field of bionic devices, and in particular to, but not limited to, a fast color-changing chameleon-like device. Background Art

[0002] In the existing technology, the color-changing effect of bionic devices is often not ideal, lacking intelligence and automation, unable to adjust the color-changing strategy in real time according to environmental changes, and difficult to achieve rapid color changes, resulting in poor results. Electrochromic materials can quickly change color when voltage is applied, have good optical properties and response speed, and have become important materials for dynamic camouflage and environmental adaptation. They are widely used in smart windows, wearable devices, automotive interiors and other fields and are receiving more and more attention.

[0003] Therefore, there is a need for a new type of electrochromic device and its control method, which can effectively improve the color change speed and stability, and at the same time have intelligent control capabilities to meet the needs of modern society for intelligent and convenient products. Summary of the invention

[0004] Based on the problems in the related art, an embodiment of the present invention provides a fast color-changing chameleon-like device, which can quickly respond to environmental changes and achieve dynamic and reversible comprehensive adjustment of color.

[0005] The technical solution of the embodiment of the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present invention provides a fast color-changing chameleon-like device, the device comprising a color sensor, a control unit, a voltage and current monitoring module, a PWM-to-voltage module, and a color-changing layer;

[0007] The color sensor is used to detect the RGB value of the surrounding environment in real time, determine the target voltage corresponding to the RGB value, and send the target voltage to the control unit;

[0008] The voltage and current monitoring module is used to monitor the real-time voltage of the device in real time and send the real-time voltage to the control unit;

[0009] The control unit is used to adjust the output voltage of the PWM-to-voltage module based on the difference between the received target voltage and the actual voltage;

[0010] The PWM-to-voltage module is used to adjust the output voltage of the color-changing layer in response to the control instruction sent by the control unit to maintain a balance between the target voltage and the real-time voltage;

[0011] The color-changing layer includes tungsten oxide with a particle size not exceeding 100 nm and a lithium ion dopant.

[0012] In some possible implementations, the device further includes a relay;

[0013] The relay is used to receive the switch control signal sent by the control unit, switch the circuit state of the device, and increase the voltage increase or decrease speed.

[0014] In some possible implementations, the device further includes a wireless communication module;

[0015] The wireless communication module can exchange data with external devices to achieve remote monitoring and control.

[0016] In some possible implementations, the mass ratio of the tungsten oxide to the lithium ion dopant is 19:1.

[0017] In some possible implementations, the lithium ion dopant is at least one of lithium fluoride or lithium chlorate.

[0018] In some possible implementations, the color-changing layer is prepared by the following method: 95 g of tungsten oxide and 5 g of lithium ion dopant are evenly ground, deionized water is added and stirred to form a slurry, and the viscosity of the slurry is adjusted to obtain the color-changing layer.

[0019] The fast color-changing chameleon-like device provided by the present invention can detect the color of the environment in real time and automatically and quickly adjust the skin color of the chameleon-like device to make it consistent with the main color of the surrounding environment by simulating the active color-changing principle of the chameleon and utilizing the characteristics of the electrochromic material, thereby achieving an effective camouflage effect. The present invention uses a current power supply monitoring module to provide real-time feedback on the voltage input of the device in the circuit, thereby ensuring the efficiency and stability of the voltage control, making the color-changing effect more accurate and more adaptable. Through the relay on-off mode, the switching speed of the two-pole color-changing voltage of the system is accelerated.

[0020] The fast color-changing chameleon-like device provided by the present invention has the characteristics of fast response, high contrast, precise control and intelligent operation, and is widely used in the fields of camouflage, decoration and intelligent equipment, and has the advantages of energy saving, environmental protection and easy integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the fast color-changing chameleon-like device provided by the present invention;

[0022] Figure 2 It is a logical flow diagram of the fast color-changing chameleon-like device provided by the present invention;

[0023] Figure 3 It is a schematic diagram of the voltage-color H value change curve provided by the present invention;

[0024] Figure 4 This is the voltage distribution diagram of the color changing layer provided by the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0026] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict. Unless otherwise defined, all technical and scientific terms used in the embodiments of the present invention have the same meaning as those commonly understood by those skilled in the art to which the embodiments of the present invention pertain. The terms used in the embodiments of the present invention are only for the purpose of describing the embodiments of the present invention and are not intended to limit the present invention.

[0027] In the following description of the present embodiment, the terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "an" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0028] Those skilled in the art should understand that in the following description of the embodiments of the present invention, the order of serial numbers does not mean the order of execution, some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0029] It will be appreciated by those skilled in the art that the numerical ranges in the embodiments of the present invention are to be understood as each intermediate value between the upper and lower limits of the scope being specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the range is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded in the scope.

[0030] Unless otherwise specified, the technical / scientific terms used herein have the same meanings as those generally understood by those skilled in the art to which the invention belongs. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe methods and / or materials related to the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0031] The embodiment of the present invention provides a fast color-changing chameleon-like device, such as Figure 1 As shown, the device includes a color sensor, a control unit, a voltage and current monitoring module, a PWM voltage conversion module and a color changing layer;

[0032] The color sensor is used to detect the RGB value of the surrounding environment in real time, determine the target voltage corresponding to the RGB value, and send the target voltage to the control unit;

[0033] The voltage and current monitoring module is used to monitor the real-time voltage of the device in real time and send the real-time voltage to the control unit;

[0034] The control unit is used to adjust the output voltage of the PWM-to-voltage module based on the difference between the received target voltage and the actual voltage;

[0035] The PWM-to-voltage module is used to adjust the output voltage of the color-changing layer in response to the control instruction sent by the control unit to maintain a balance between the target voltage and the real-time voltage;

[0036] The color-changing layer includes tungsten oxide with a particle size not exceeding 100 nm and a lithium ion dopant.

[0037] The fast color-changing chameleon-like device provided by the present invention can detect the color of the environment in real time and automatically and quickly adjust the skin color of the chameleon-like device to make it consistent with the main color of the surrounding environment by simulating the active color-changing principle of the chameleon and utilizing the characteristics of the electrochromic material, thereby achieving an effective camouflage effect. The present invention uses a current power supply monitoring module to provide real-time feedback on the voltage input of the device in the circuit, thereby ensuring the efficiency and stability of the voltage control, making the color-changing effect more accurate and more adaptable. Through the relay on-off mode, the switching speed of the two-pole color-changing voltage of the system is accelerated.

[0038] In the embodiment of the present invention, the color sensor can detect the ambient color in real time and convert the detection result into an electrical signal for processing by the microcontroller.

[0039] In an embodiment of the present invention, the control unit is an STM32 microcontroller for receiving signals from a color sensor and performing data processing; the feedback control algorithm is used to dynamically adjust the output of the PWM-to-voltage module according to the difference between the target voltage and the actual voltage.

[0040] In an embodiment of the present invention, the voltage and current monitoring module is used to monitor the device voltage value in real time as the feedback adjustment data of the system. After being transmitted to the microcontroller, the target voltage value and the actual voltage value are calculated, thereby correcting the received signal of the PWM to voltage module; it can monitor the voltage and current of the device in real time, and feed back the monitoring data to the microcontroller for further adjustment.

[0041] In the embodiment of the present invention, the relay is used to switch the circuit state and increase the speed of voltage increase or voltage reduction. The electrical switch device receives the switch signal from the microcontroller and is responsible for quickly realizing the 5V voltage increase and 0V voltage disconnection required for the device to change color, thereby increasing the speed of the device to change color under high voltage and zero voltage conditions.

[0042] In the embodiment of the present invention, the control unit can exchange data with external devices through the wireless communication module to achieve remote monitoring and control. The design of the control unit enables it to adapt to different electrochromic materials and application scenarios, and has good versatility and flexibility.

[0043] In the embodiment of the present invention, the PWM-to-voltage module adjusts the voltage according to the voltage control signal sent by the microcontroller, and then outputs it to the chameleon device.

[0044] In the embodiment of the present invention, the color-changing layer is an electrochromic material, and the electrochromic material is tungsten oxide WO3 powder, and the particle size does not exceed 100nm. The electrochromic material is doped with lithium salt, and the lithium salt is lithium fluoride LiF or lithium chlorate LiClO4. Among them, the ratio of WO3 and lithium ion dopant is: 95g WO3, 5g lithium ion dopant.

[0045] In the embodiment of the present invention, the color-changing layer is prepared by the following method: 95 g of tungsten oxide and 5 g of lithium ion dopant are evenly ground, deionized water is added and stirred to form a slurry, and the viscosity of the slurry is adjusted.

[0046] In the embodiment of the present invention, the slurry can be coated on a flexible substrate, and the flexible substrate is polyimide PI. It should be noted that before the slurry is coated on the flexible substrate, it needs to be cleaned with deionized water and ethanol to remove surface impurities and grease, and dried with nitrogen.

[0047] In the embodiment of the present invention, the slurry can be evenly coated on the flexible substrate by a doctor blade coating method to ensure uniform coating and moderate thickness. The coated substrate is placed in a low-temperature oven to dry to remove the solvent, and heat treated as needed to enhance the adhesion and electrochromic performance of the material.

[0048] In the embodiment of the present invention, conductive electrodes are added to both sides of the electrochromic layer, and low-temperature welding is performed by ultrasonic welding technology to weld the external circuit wires to both ends of the electrodes. Ultrasonic waves are used for low-temperature welding to increase the electrode contact area, thereby increasing the charge transfer rate and accelerating the color change of the system. At the same time, the low temperature also reduces the heat generated during the welding process, reducing the thermal impact on the surrounding materials and avoiding thermal damage and deformation.

[0049] The technical method of the present invention will be further described below in conjunction with specific embodiments.

[0050] Material preparation: Choose tungsten oxide (WO3) powder as the electrochromic material, and ensure that its particle size does not exceed 100nm. Mix 95g of WO3 powder with 5g of lithium salt (such as lithium fluoride (LiF) or lithium chlorate (LiClO4)) to ensure uniform distribution. At the same time, prepare an appropriate amount of deionized water or ethanol to dissolve the lithium salt to form an electrolyte solution.

[0051] Prepare slurry; combine the mixed WO3 and lithium salt solution, stir evenly to form slurry.

[0052] Substrate preparation: Choose polyimide (PI) as the flexible substrate to ensure it has good flexibility and durability. Use deionized water and ethanol to clean the PI substrate to remove surface impurities and grease, and dry it with nitrogen or air after cleaning.

[0053] Coating slurry: Use blade coating, spray coating or spin coating to evenly coat the prepared slurry on the PI substrate, ensuring that the coating is uniform and the thickness is 20 μm (usually between a few μm and tens of μm).

[0054] Drying and curing: Place the coated substrate in a well-ventilated environment or dry it in a low-temperature oven to remove the solvent. Of course, heat treatment can also be performed at an appropriate temperature to enhance the adhesion and electrochromic properties of the material.

[0055] Adding conductive electrodes: Add conductive electrodes on both sides of the electrochromic layer, using indium tin oxide (ITO) electrodes. The ITO film can be evenly deposited on both sides of the PI substrate by sputtering to form electrodes. Add lead electrodes at the edge or specific location of the electrode, and use metal wires to weld to the electrode through ultrasonic low temperature to ensure good connection between the electrode and the external circuit.

[0056] Control unit: TCS230 sensor is installed at the appropriate position of the device to detect the color of the environment in real time. STM32 microcontroller is used as the core control unit, connecting the color sensor, voltage and current monitoring module (INA226), PWM voltage conversion module and relay. The voltage and current monitoring module monitors the voltage and current of the device in real time and feeds the monitoring data back to the microcontroller for further adjustment. The logic flow chart during this period is as follows: Figure 2 shown.

[0057] System debugging: After the assembly of the fast color-changing chameleon-like device is completed, the system debugging is carried out. The microcontroller receives the signal from the color sensor and adjusts the output of the PWM to voltage module to achieve precise control of the electrochromic layer. The color-changing effect of the system under different environmental conditions is tested to ensure that it can respond quickly and adapt to environmental changes.

[0058] This embodiment 1 provides a fast color-changing chameleon-like device based on an electrochromic material, and tests its reversible color change effect under a reversible voltage.

[0059] The color tone value of the chameleon-like device under different voltages is tested in the voltage range of 0-5V, and the change curve is drawn as follows: Figure 3 As shown in the figure, the horizontal axis is voltage (0-5V) and the vertical axis is H (0-240).

[0060] Example 2: Using a relay to conduct on / off tests on the lowest color-changing voltage 0V and the highest color-changing voltage 5V, the results show that the device is faster than an ordinary buck-boost module.

[0061] Modules 5v 5v - Relay Color change time 1.8s 1s Modules 0v 0v-Relay Color change time 1.8s 1s

[0062] Relays can respond quickly to control signals and switch circuit states directly, especially when dealing with high voltage and high current. Compared with other modules, relays have less delay when switching and can switch voltage faster.

[0063] Example 3: Controlling the Graphics of Voltage Distribution

[0064] The voltage distribution test of the chameleon-like device is carried out, and a laser etching device is used on the color-changing material layer to etch according to the designed distribution pattern.

[0065] Lasers can be precisely controlled to form complex shapes.

[0066] A laser power of 20 W was selected to ensure that the color-changing material could be effectively etched without causing overheating.

[0067] The scanning speed was set to 300 mm / s to balance the etching speed and etching quality.

[0068] Adjust the focal length to 3mm to ensure that the laser beam is well focused on the material surface.

[0069] A repetition frequency of 50 kHz was selected to improve the etching accuracy and efficiency.

[0070] The etching depth was set to 30 μm to ensure the desired color change effect.

[0071] Depending on the different distribution of voltage, the color change speed is different, such as Figure 4 shown.

[0072] Example 4: Controlling the color change speed of voltage distribution

[0073] Graphics No Graphics Figure 1 Figure 2 Figure 3 Figure 4 Color change time 2s 3.4s 2.7s 0.8s 0.5s

[0074] In the present invention, the design of the grid shape makes the device change color fastest, and the current is evenly distributed throughout the color-changing layer, avoiding local overheating or uneven color change caused by current concentration in certain areas. This uniform current distribution helps to speed up the migration speed of ions, thereby improving the response speed of color change. At the same time, the design of the grid shape helps to better dissipate heat and avoid the degradation of material performance due to local overheating. Good thermal management can keep the material at the optimal operating temperature, thereby improving the color change speed.

[0075] In summary, the present invention provides a fast color-changing chameleon-like device, which realizes fast color change by combining electrochromic materials and silver nanowire networks, and has broad application prospects.

[0076] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0077] The above is only an embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fast color-changing chameleon-like device, characterized in that: The device includes a color sensor, a control unit, a voltage and current monitoring module, a PWM to voltage module and a color changing layer; The color sensor is used to detect the RGB value of the surrounding environment in real time, determine the target voltage corresponding to the RGB value, and send the target voltage to the control unit; The voltage and current monitoring module is used to monitor the real-time voltage of the device in real time and send the real-time voltage to the control unit; The control unit is used to adjust the output voltage of the PWM-to-voltage module based on the difference between the received target voltage and the actual voltage; The PWM-to-voltage module is used to adjust the output voltage of the color-changing layer in response to the control instruction sent by the control unit to maintain a balance between the target voltage and the real-time voltage; The color-changing layer includes tungsten oxide with a particle size not exceeding 100 nm and a lithium ion dopant.

2. The fast color-changing chameleon-like device according to claim 1, characterized in that: The device also includes a relay; The relay is used to receive the switch control signal sent by the control unit, switch the circuit state of the device, and increase the voltage increase or decrease speed.

3. The fast color-changing chameleon-like device according to claim 1, characterized in that: The device also includes a wireless communication module; The wireless communication module can exchange data with external devices to achieve remote monitoring and control.

4. The fast color-changing chameleon-like device according to claim 1, characterized in that: The mass ratio of the tungsten oxide to the lithium ion dopant is 19:

1.

5. The fast color-changing chameleon-like device according to claim 1, characterized in that: The lithium ion dopant is at least one of lithium fluoride and lithium chlorate.

6. The fast color-changing chameleon-like device according to claim 1, characterized in that: The color-changing layer is prepared in the following manner: 95 g of tungsten oxide and 5 g of lithium ion dopant are evenly ground, deionized water is added and stirred to form a slurry, and the viscosity of the slurry is adjusted to obtain the color-changing layer.

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