A magnetoelectric coupling balanced passive dual-mode synchronous recording device and design method
Patent Information
- Application Number
- CN202611498870.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-24
- Publication Date
- 2026-10-30
AI Technical Summary
[0004]本发明的目的在于克服上述技术不足，提出一种磁电耦合平衡无源双模同步记录装置及设计方法，解决现有技术中记录装置适用范围受限，通用性差的技术问题
[0015]与现有技术相比，本发明提供的一种磁电耦合平衡无源双模同步记录装置的设计方法，该设计方法依次制作磁性微珠板层、粘合胶层及柔性电容屏层，复合构成层状组件，搭配同步传输模块实现信号的采集、传输与存储。该设计方法组装简便，通过分层复合设计，将无源物理显影的磁性微珠与有源电子采集的柔性电容屏层集成一体，使同步记录装置同时具备物理留痕、电子数据同步双重功能，装置通用性强，应用范围广。
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Figure CN123011079A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electronic digital data processing technology, specifically to a magnetoelectric coupling balanced passive dual-mode synchronous recording device and its design method. Background Technology
[0002] Currently, recording devices in industrial and civilian fields are mainly divided into two categories: First, passive physical recording devices. These devices rely on magnetic fields to drive microbeads to flip and form images. They require no power supply and can be repeatedly erased and rewritten, but they cannot electronically archive or synchronously transmit the recorded content; they can only achieve physical information retention and cannot meet the needs of digital industry. Second, active electronic recording devices. These devices require an external power supply to operate. They can complete electronic information acquisition and data synchronization, but they cannot retain any visible handwriting when the power is off, limiting their use in special scenarios such as outdoor environments, power outages, and explosion-proof environments.
[0003] Therefore, current recording devices cannot simultaneously achieve passive physical development and active electronic synchronization, limiting their applicability and versatility. Summary of the Invention
[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a magnetoelectric coupling balanced passive dual-mode synchronous recording device and design method, thereby solving the technical problems of limited applicability and poor versatility of existing recording devices.
[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a design method for a magnetoelectric coupling balanced passive dual-mode synchronous recording device. The design method includes: filling a cavity in a substrate with magnetic microspheres; covering the substrate surface with a sealing layer to seal the cavity, forming a magnetic microsphere plate layer; uniformly coating the sealing layer surface of the magnetic microsphere plate layer with an adhesive layer; bonding a capacitor substrate and a conductive film to form a flexible capacitor screen layer; attaching the capacitor substrate of the flexible capacitor screen layer to the uncured adhesive layer surface and pressing it to bond the flexible capacitor screen layer to the magnetic microsphere plate layer, obtaining a layered composite component; and connecting a synchronous transmission module to the layered composite component for signal transmission. The synchronous transmission module is used to acquire handwriting coordinates and pressure signals, and for real-time signal transmission and storage.
[0006] In some embodiments, after attaching the capacitor substrate of the flexible capacitor screen layer to the surface of the uncured adhesive layer and pressing it to bond the flexible capacitor screen layer to the magnetic microbead layer and obtain a layered composite component, the design method further includes: wrapping the edge of the layered composite component with a frame.
[0007] In some embodiments, after filling the receiving cavity of the substrate with magnetic microspheres and covering the substrate surface with a sealing layer to seal the receiving cavity, forming a magnetic microsphere plate layer, the design method further includes: verifying the magnetic microsphere plate layer so that the gradient driving force applied by the magnetic field to the magnetic microspheres is greater than the sum of all resistances that impede the movement of the magnetic microspheres, i.e.: ; Substituting the physical expressions for each force, we obtain the complete development kinetic equation: ; in, Gradient driving force; This refers to sliding friction resistance; Viscosity resistance; For the elastic resistance of the sealing layer; The diameter of a single magnetic microsphere; The vacuum permeability; The magnetic susceptibility of the magnetic microspheres; The magnetic flux density gradient; The coefficient of kinetic friction; Density of magnetic microspheres; It is the acceleration due to gravity; To determine the viscosity of the filling medium; The velocity of the magnetic microspheres; This represents the maximum close-packed filling ratio. The volume fill rate of magnetic microspheres; The Young's modulus of the sealing layer; This represents the maximum deformation of the sealing layer; This refers to the thickness of the sealing layer.
[0008] In some embodiments, after bonding the capacitor substrate and the conductive film to form a flexible capacitor screen layer, the design method further includes: verifying the flexible capacitor screen layer, whereby the capacitance change is affected by pressure deformation, magnetoelectric effect, and circuit dynamic response, and the relative capacitance change can be expressed as: ; After expansion, the complete acquisition accuracy equation is obtained: ; ; ; in, This represents the relative change in ideal capacitance. This represents the actual change in capacitance. This is the correction factor for magneto-induced dielectric interference; This is the dynamic response correction factor; The base capacitance of the flexible capacitive screen layer; This is the minimum detectable relative capacitance change threshold for the capacitance acquisition circuit. The normal pressure applied by the pen tip to the flexible capacitive screen layer; for place Magnetic flux density over time y is the x-coordinate and y is the y-coordinate; To accommodate the compression deformation of the adhesive layer; The thickness of the adhesive layer; The Young's modulus of the adhesive layer; The thickness of the flexible capacitive touchscreen layer; This refers to the effective contact area of the pen tip. The magnetoelectric dielectric constant of the adhesive; This refers to the resistance of the electrode lines of a flexible capacitive touchscreen.
[0009] In some embodiments, after attaching the capacitor substrate of the flexible capacitor screen layer to the surface of the uncured adhesive layer and pressing it to bond the flexible capacitor screen layer to the magnetic microsphere layer and obtain a layered composite component, the design method further includes: jointly verifying the magnetic microsphere layer and the flexible capacitor screen layer, wherein the total interference error rate of the magnetic field on the capacitance acquisition is the sum of the two: ; Substituting the physical expressions for each error term, we obtain the critical condition for suppressing magneto-electric coupling interference: ; in, This is due to the error caused by the magnetoelectric effect. This is due to the polarization effect error of the magnetic microbeads; The relative permittivity of the capacitive touchscreen substrate is _____. The relative permittivity of the adhesive layer; It is the vacuum permittivity; The electric field strength driving the capacitive touchscreen; For driving voltage, ; This represents the local electric field intensity caused by the polarization of the magnetic microspheres.
[0010] Secondly, the present invention also provides a magnetoelectric coupling balanced passive dual-mode synchronous recording device, manufactured using the above-mentioned design method. The synchronous recording device includes a layered composite component and a synchronous transmission module. The layered composite component includes a magnetic microbead layer, a flexible capacitive screen layer, and an adhesive layer located between the flexible capacitive screen layer and the magnetic microbead layer. The flexible capacitive screen layer has wiring terminals on its side. The synchronous transmission module is connected to the wiring terminals and is used to receive the handwriting coordinates and pressure signals acquired by touch, and to transmit and archive them in real time.
[0011] In some embodiments, the synchronous recording device further includes a frame and an erasing module, wherein the frame is used to wrap the edge of the layered composite component; and the erasing module is used to disturb the arrangement of magnetic microbeads by means of a magnetic field.
[0012] In some embodiments, the magnetic microbead layer includes a substrate, magnetic microbeads, and a sealing layer; the substrate has uniformly distributed receiving cavities inside, the diameter of which is between 0.1 mm and 0.2 mm, and the depth of which is between 0.05 mm and 0.15 mm; the magnetic microbeads are located in the receiving cavities of the substrate, and the diameter of the magnetic microbeads is between 30 μm and 80 μm; the sealing layer is used to seal the receiving cavities, and the thickness of the sealing layer is between 0.05 mm and 0.1 mm.
[0013] In some embodiments, the flexible capacitive screen layer includes a capacitor substrate and a conductive film, the thickness of the flexible capacitive screen layer is between 0.1mm and 0.2mm, and the base capacitance of the flexible capacitive screen layer is between 100pF and 500pF.
[0014] In some embodiments, the adhesive layer is made of optically transparent adhesive, and the thickness of the adhesive layer is between 0.1 mm and 0.3 mm.
[0015] Compared with existing technologies, this invention provides a design method for a magnetoelectric coupling balanced passive dual-mode synchronous recording device. This method sequentially fabricates a magnetic microbead layer, an adhesive layer, and a flexible capacitive screen layer, assembling them into a layered assembly. This assembly, combined with a synchronous transmission module, enables signal acquisition, transmission, and storage. This design method is easy to assemble. Through layered composite design, it integrates passively physically developing magnetic microbeads with an active electronically acquired flexible capacitive screen layer, giving the synchronous recording device both physical tracking and electronic data synchronization functions. The device is highly versatile and has a wide range of applications. Attached Figure Description
[0016] Figure 1 This is a flowchart illustrating the design method of a magnetoelectric coupling balanced passive dual-mode synchronous recording device provided in an embodiment of the present invention. Figure 1 ; Figure 2 This is a flowchart illustrating the design method of a magnetoelectric coupling balanced passive dual-mode synchronous recording device provided in an embodiment of the present invention. Figure 2 ; Figure 3 This is a flowchart illustrating the design method of a magnetoelectric coupling balanced passive dual-mode synchronous recording device provided in an embodiment of the present invention. Figure 3 ; Figure 4 This is a flowchart illustrating the design method of a magnetoelectric coupling balanced passive dual-mode synchronous recording device provided in an embodiment of the present invention. Figure 4 ; Figure 5This is an exploded structural diagram of a magnetoelectric coupling balanced passive dual-mode synchronous recording device provided in an embodiment of the present invention; Figure 6 This is a front view of a magnetoelectric coupling balanced passive dual-mode synchronous recording device provided in an embodiment of the present invention; Figure 7 This is a partial cross-sectional view of a magnetoelectric coupling balanced passive dual-mode synchronous recording device provided in an embodiment of the present invention.
[0017] Explanation of reference numerals in the attached figures: 200. Synchronous recording device; 210. Magnetic microbead plate layer; 211. Magnetic microbeads; 212. Substrate; 213. Sealing layer; 220. Adhesive layer; 230. Flexible capacitive screen layer; 231. Capacitor substrate; 232. Conductive film. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0019] Currently, recording devices in industrial and civilian fields are mainly divided into two categories: passive physical recording devices, which cannot meet the needs of digital industry; and active electronic recording devices, which cannot retain any visible handwriting when power is off. Therefore, current recording devices suffer from technical problems such as limited applicability and poor versatility.
[0020] To address the technical problems of limited applicability and poor versatility of recording devices, this invention provides a design method for a magnetoelectric coupling balanced passive dual-mode synchronous recording device. The synchronous recording device obtained by this design method can realize passive physical development and active electronic synchronization functions, and has a wide range of applications and strong versatility.
[0021] It should be noted that the synchronous recording device made by the design method provided by the present invention is used in scenarios such as industrial robot writing and recording, extreme environment data acquisition, and passive on-site signature confirmation. For ease of explanation, this invention will only use the application of the synchronous recording device made by the design method in the scenario of industrial robot writing and recording as an example. The principle of the synchronous recording device made by the design method in other application scenarios is essentially the same as that in the scenario of industrial robot writing and recording, and will not be described in detail here.
[0022] In some embodiments, the present invention provides a design method for a magnetoelectrically coupled balanced passive dual-mode synchronous recording device, such as... Figure 1 As shown, the design method includes: Step S110: Fill the receiving cavity of the substrate with magnetic microbeads, and cover the substrate surface with a sealing layer to seal the receiving cavity, forming a magnetic microbead plate layer.
[0023] Specifically, the magnetic microbead layer includes a substrate, magnetic microbeads, and a sealing layer. The substrate is a flexible plastic substrate with uniformly distributed cavities inside. The magnetic microbeads are filled into the cavities, allowing them to move freely under the influence of a magnetic field. The sealing layer covers the surface of the substrate and is located on the side facing the adhesive layer. It is used to fix the magnetic microbeads and prevent them from falling off, thus forming the magnetic microbead layer. The magnetic microbead layer needs to meet the requirements for flatness when bonding with the flexible capacitive screen layer.
[0024] Step S120: Apply colloid evenly to the sealing layer surface of the magnetic microbead plate layer to form an adhesive layer.
[0025] Specifically, a transparent insulating optical adhesive with a low magneto-dielectric coefficient is uniformly coated on the sealing layer surface of the magnetic microbead layer to form an adhesive layer.
[0026] Step S130: The capacitor substrate and the conductive film are bonded together to form a flexible capacitor screen layer.
[0027] Specifically, the flexible capacitive screen layer includes a capacitor substrate and a conductive film. The conductive film is made of a flexible, transparent conductive film material, adapted to the shape and size of the magnetic microsphere layer. The capacitor substrate and the conductive film are bonded together to form the flexible capacitive screen layer. The conductive film is the sensing surface of the flexible capacitive screen layer, with the sensing surface facing outwards, i.e., the side away from the magnetic microsphere layer, to receive the capacitive sensing signal from the dedicated writing pen and collect the position and pressure information of the pen strokes.
[0028] Step S140: The capacitor substrate of the flexible capacitor screen layer is attached to the surface of the uncured adhesive layer and pressed to bond the flexible capacitor screen layer with the magnetic microbead layer, thereby obtaining a layered composite component.
[0029] Specifically, the device consists of a flexible capacitor screen layer, an adhesive layer, and a magnetic microsphere layer from top to bottom. The capacitor substrate is pressed against the surface of the uncured adhesive layer, and the flexible capacitor screen layer and the magnetic microsphere layer are tightly bonded together through the adhesive layer, so as to minimize any gaps between them, thus obtaining a layered composite component.
[0030] For example, after step S140, as Figure 4As shown, the design method also includes step S141, wrapping the edge of the layered composite component with a frame. Specifically, after obtaining the layered composite component, the frame is installed, and the process of wrapping the edge of the layered composite component with the frame is added. This step 141 can be before or after step S150, and there is no specific order between the two. The frame protects the edge of the composite layer, preventing interlayer delamination, colloid cracking, and the intrusion of dust and moisture, effectively improving the overall structural strength and service life of the device.
[0031] Step S150: Connect the synchronous transmission module to the layered composite component. The synchronous transmission module is used to collect handwriting coordinates and pressure signals, and is used for real-time transmission and storage of signals.
[0032] Specifically, the edge of the flexible capacitive screen layer is provided with wiring terminals, which connect the synchronous transmission module to the wiring terminals for signal connection.
[0033] In this embodiment, the design method sequentially fabricates a magnetic microbead layer, an adhesive layer, and a flexible capacitive screen layer, which are then combined to form a layered assembly. This assembly, along with a synchronous transmission module, enables signal acquisition, transmission, and storage. This design method is easy to assemble. Through a layered composite design, it integrates passively physically developing magnetic microbeads with an actively acquiring flexible capacitive screen layer, giving the synchronous recording device both physical tracking and electronic data synchronization functions. The device is highly versatile and has a wide range of applications.
[0034] In some embodiments, after the magnetic microsphere plate is prepared, based on the magnetic microsphere development kinetic equation, and according to the necessary and sufficient condition for the magnetic microsphere to flip and develop under the action of the pen tip magnetic field, the magnetic field driving force is limited to be greater than the various motion resistances experienced by the magnetic microsphere.
[0035] Specifically, in step S110, magnetic microspheres are filled into the receiving cavity of the substrate, and a sealing layer is placed on the substrate surface to seal the receiving cavity, forming a magnetic microsphere plate layer, as follows: Figure 2 As shown, the design method also includes: Step S111: Verify the magnetic microsphere layer. The gradient driving force applied by the magnetic field to the magnetic microspheres is greater than the sum of all resistances hindering the movement of the magnetic microspheres, that is: ; Substituting the physical expressions for each force, we obtain the complete development kinetic equation: ; in, The gradient driving force (the gradient driving force generated by the non-uniform magnetic field at the pen tip on the magnetic microspheres). This refers to the sliding friction resistance (the sliding friction resistance between the magnetic microspheres and the inner wall of the substrate); For viscosity resistance, where relative viscosity ; ( (where the maximum deformation of the sealing layer is the maximum elastic resistance of the sealing layer) The diameter of a single magnetic microsphere; The permeability of free space, ; The magnetic susceptibility of the magnetic microspheres; The magnetic flux density gradient (the magnetic flux density gradient of the pen tip at the location of the magnetic microbead). This is the coefficient of kinetic friction (the coefficient of kinetic friction between the magnet and the inner wall of the substrate). Density of magnetic microspheres; It is the acceleration due to gravity; To determine the viscosity of the filling medium; The velocity of the magnetic microspheres. ; This represents the maximum close-packed filling ratio. Magnetic microsphere volume fill rate ; The Young's modulus of the sealing layer; This represents the maximum deformation of the sealing layer; This refers to the thickness of the sealing layer.
[0036] In this embodiment, a quantitative mechanical judgment basis is constructed to accurately match the parameters of the magnetic field, microbeads, medium, and sealing layer, shorten the development cycle, ensure smooth movement of magnetic microbeads, and further enhance the stability and reliability of physical development effect.
[0037] In some embodiments, after the flexible capacitive screen layer is fabricated, based on the equation for the penetration and acquisition accuracy of the electric field of the capacitive screen, and according to the working principle of the capacitive sensor, when the conductor pen tip approaches the capacitive screen, it will cause a change in the capacitance between the electrodes, and the accuracy of the flexible capacitive screen layer is verified.
[0038] Specifically, after bonding the capacitor substrate and the conductive film in step S130 to form a flexible capacitor screen layer, as follows: Figure 3 As shown, the design method also includes: Step S131: Verify the flexible capacitor screen layer. The capacitance change is affected by pressure deformation, magnetoelectric effect, and circuit dynamic response. Its relative change can be expressed as: ; After expansion, the complete acquisition accuracy equation is obtained: ; ; ; in, This represents the relative change in ideal capacitance. This is the correction factor for magneto-induced dielectric interference; For dynamic response correction coefficients, time constant ; The base capacitance of the flexible capacitive screen layer; This is the minimum detectable relative capacitance change threshold for the capacitance acquisition circuit. The normal pressure applied by the pen tip to the flexible capacitive screen layer; To generate magnetic induction intensity, applicable The weak nonlinear region; express place The magnetic flux density over time; To accommodate the compression deformation of the adhesive layer; The thickness of the adhesive layer; The Young's modulus of the adhesive layer; The thickness of the flexible capacitive touchscreen layer; The effective contact area of the pen tip. ; The magnetoelectric dielectric constant of the adhesive; This refers to the resistance of the electrode lines of a flexible capacitive touchscreen.
[0039] In this embodiment, a data acquisition accuracy equation is constructed and a detection threshold is set by integrating pressure deformation, magnetoelectric effect, and circuit dynamic response. This quantifies the impact of multiple factors on the capacitive signal, ensuring the accuracy of handwriting and pressure data acquisition. Simultaneously, an interference correction coefficient is introduced to avoid signal distortion caused by magnetic fields and circuits. Standardized parameter design using thresholds improves the operational stability of the electronic data acquisition module.
[0040] In some embodiments, after obtaining the layered composite component, based on the core equation for suppressing magneto-electric coupling interference, the interference of the magnetic field on the capacitor acquisition originates from two independent physical mechanisms: first, the magnetic field causes a change in the dielectric constant of the adhesive and the capacitor substrate (magnetic dielectric effect); second, the magnetic microspheres, as high permeability materials, generate polarization charges in the electric field, leading to local electric field distortion, and the overall coupling is verified.
[0041] Specifically, in step S140, the capacitor substrate of the flexible capacitor screen layer is adhered to the surface of the uncured adhesive layer and pressed to bond the flexible capacitor screen layer with the magnetic microsphere layer, thus obtaining a layered composite component, as follows: Figure 4 As shown, the design method also includes: Step S142: Verify both the magnetic microbead layer and the flexible capacitor screen layer. The total interference error rate of the magnetic field on the capacitor acquisition is the sum of the two: ; Substituting the physical expressions for each error term and based on industrial application requirements (handwriting position error ≤ 0.1 mm, corresponding capacitance measurement error ≤ 1%), the critical condition for suppressing magneto-electric coupling interference is obtained: ; in, This is due to the error caused by the magnetoelectric effect. The relative permittivity of the capacitive touchscreen substrate; This is due to the polarization effect error of the magnetic microbeads; The relative permittivity of the adhesive layer; The relative permittivity of the capacitor substrate; The vacuum permittivity, ; The electric field strength driving the capacitive touchscreen; ; This represents the local electric field intensity caused by the polarization of the magnetic microspheres.
[0042] In this embodiment, joint verification of layered composite components is performed to establish critical conditions for suppressing magnetoelectric coupling interference and set an upper limit for the error rate. By constraining the overall interference error through quantitative formulas, the influence of magnetoelectric coupling is precisely weakened, solving the problem that dual-mode devices are difficult to adapt to magnetic microbead scenarios. Based on critical standards, the magnetic and electrical parameters are synergistically optimized to ensure that physical development and electronic acquisition do not interfere with each other, comprehensively improving the operational reliability of the device.
[0043] In some embodiments, multi-objective comprehensive performance optimization is further included after step S142.
[0044] Specifically, to balance the four interdependent performance indicators of development quality, acquisition accuracy, response speed, and service life, a weighted multi-objective optimization function was established to comprehensively evaluate the performance indicators. Maximize the design goal: ; The definitions, calculation formulas, and weights of each performance indicator are shown in the table below:
[0045] In the table, Divide the development contrast by the designed optimal development contrast, and convert to a dimensionless fraction between 0 and 1. To achieve the desired optimal contrast ratio in the design. To calculate the reciprocal of the acquisition accuracy divided by the reciprocal of the design-desired optimal acquisition accuracy, convert it to a dimensionless fraction between 0 and 1. To achieve the desired optimal acquisition accuracy. The response time is the reciprocal divided by the reciprocal of the design-expected response time, converted to a dimensionless fraction between 0 and 1. This is the minimum response time expected in the design. The actual number of lifetimes is divided by the designed maximum lifetime level, converted to a dimensionless fraction between 0 and 1. This is the highest expected lifespan level in the design.
[0046] The weighting coefficients are determined based on the core requirements of industrial robot recording applications. Development clarity and acquisition accuracy are given the highest priority, followed by response speed, and lifespan is given the lowest weight (100,000 erase / write cycles are sufficient for basic requirements in industrial scenarios).
[0047] In some embodiments, after the multi-objective comprehensive performance optimization step, the physical meaning and correlation verification of the custom coefficients are also included.
[0048] 1. Capacitance acquisition threshold coefficient This refers to the minimum detectable relative capacitance change threshold of the capacitance acquisition circuit.
[0049] Definition: ; Physical meaning: The smallest relative capacitance change that a capacitance acquisition circuit can stably detect is determined by the circuit's signal-to-noise ratio, gain, and parasitic parameters.
[0050] Parameter correlation: with circuit noise voltage Parasitic resistance It is positively correlated with the power supply voltage. Circuit gain Load resistance It shows a negative correlation.
[0051] Value range: When using a 12-bit ADC + low-noise operational amplifier, .
[0052] 2. Development efficiency coefficient
[0053] Definition: The equation can be rearranged from the development kinetics equation to obtain: ; in This is the combined coefficient of all resistance factors.
[0054] Physical meaning: The ratio of the minimum magnetic field gradient required to achieve stable development to the parameters of the microbeads.
[0055] Parameter correlation: with coefficient of kinetic friction , viscosity of filling medium Young's modulus of sealing layer It shows a positive correlation with the magnetic susceptibility of magnetic microspheres. Diameter of magnetic microspheres Magnetic microsphere volume filling rate Negative correlation This represents the maximum deformation of the sealing layer; Value range: For ferrite magnetic microspheres + PET substrate + silicone oil dielectric, .
[0056] This invention also provides a magnetoelectric coupling balanced passive dual-mode synchronous recording device 200, such as... Figures 5 to 7 As shown, the synchronous recording device 200, manufactured using the above design method, includes a layered composite component and a synchronous transmission module. The layered composite component includes a magnetic microbead layer 210, a flexible capacitive screen layer 230, and an adhesive layer 220 located between the flexible capacitive screen layer 230 and the magnetic microbead layer 210. The flexible capacitive screen layer 230 has wiring terminals on its side. The synchronous transmission module is connected to the wiring terminals and is used to receive the handwriting coordinates and pressure signals acquired by touch, and to transmit and archive them in real time.
[0057] The layered composite component is the core functional layer, consisting of a flexible capacitive screen layer 230, an adhesive layer 220, and a magnetic microbead layer 210 from top to bottom.
[0058] Exemplarily, the magnetic microbead layer 210 includes a substrate 212, magnetic microbeads 211, and a sealing layer 213. The substrate is a flexible plastic substrate, and the substrate 212 has uniformly distributed receiving cavities inside. The receiving cavities are cylindrical, with a diameter between 0.1 mm and 0.2 mm and a depth between 0.05 mm and 0.15 mm. The magnetic microbeads 211 are located within the receiving cavities of the substrate 212. The magnetic microbeads 211 are made of ferrite material, and their diameter is... The magnetic microspheres are between 30μm and 80μm in size; their saturation magnetic induction is between 0.3T and 0.5T; and their magnetic susceptibility is... Magnetic microsphere volume filling rate The cavity is filled with silicone oil medium, and the viscosity of the filling medium is... The sealing layer is a PET film, and the thickness of the sealing layer is... Young's modulus of the sealing layer .
[0059] For example, the adhesive layer 220 is made of optically transparent adhesive, and the thickness of the adhesive layer 220 is between 0.1 mm and 0.3 mm. Specifically, a transparent insulating optical adhesive (OCA) with a low magnetostrictive dielectric constant is used, and the thickness is... Young's modulus of the adhesive layer The magnetoelectric dielectric constant of the adhesive This ensures a strong bond between layers while minimizing the impact of the magnetic field on the dielectric constant.
[0060] Exemplarily, the flexible capacitive screen layer 230 includes a capacitor substrate 231 and a conductive film 232. The conductive film 232 is made of a flexible transparent conductive film material, such as ITO (Indium Tin Oxide), which is a transparent conductive oxide coating. The sensing surface faces outwards, i.e., the side away from the magnetic microbead layer, and is used to receive the capacitive sensing signal from the pen tip, collecting the position, pressure, and time information of the pen strokes. Terminals are provided at the edge for electrical connection to the synchronous transmission module. The thickness of the flexible capacitive screen layer... The substrate capacitance of the flexible capacitive screen layer .
[0061] The flexible capacitive screen layer 230 and the magnetic microbead plate layer 210 are tightly bonded together by the adhesive layer 220, with as few gaps as possible between them, which ensures a firm bond between the layers without affecting capacitive sensing and magnetic imaging.
[0062] The synchronous transmission module is the signal processing and data transmission unit of the device. It is used to acquire electronic signals such as handwriting and pressure generated by the capacitive touchscreen in real time, and after parsing and temporarily storing them, it synchronously transmits the data outward. The synchronous transmission module is connected to the side wiring terminals of the flexible capacitive touchscreen layer 230.
[0063] In some embodiments, the synchronous recording device 200 further includes a frame and an erasing module, the frame being used to wrap the edge of the layered composite component; the erasing module being used to disturb the arrangement of magnetic microbeads by means of a magnetic field.
[0064] To better understand this invention, the following is combined with... Figures 1 to 7 The technical solution of the present invention will be described in detail below: In some embodiments, the design method includes steps S110 to prepare a magnetic microsphere layer, step S111 to verify the magnetic microsphere layer, step S120 to prepare an adhesive layer, step S131 to prepare a flexible capacitive screen layer, step S131 to verify the flexible capacitive screen layer, step S140 to obtain a layered composite component, step S142 to jointly verify the magnetic microsphere layer and the flexible capacitive screen layer, as well as multi-objective comprehensive performance optimization and verification of the physical meaning and correlation of custom coefficients, thereby obtaining a synchronous recording device 200.
[0065] For example, by establishing a complete theoretical model of magneto-electric coupling balance, the parameter design of the synchronous recording device 200 is quantitatively guided by the core equations. The synchronous recording device 200 is calculated using a multi-objective optimization function, and its comprehensive performance indicators are obtained. .
[0066] Flexible capacitive screen layer: ; ; .
[0067] Adhesive layer: ; ; .
[0068] Magnetic microbead layer: ; ; ; ; ; .
[0069] In this embodiment, the provided magnetoelectric coupling balanced passive dual-mode synchronous recording device 200 can effectively solve the following problems: 1. Realize physical recording in the powerless state and electronic synchronous acquisition in the power-on state; 2. Suppress the interference of strong magnetic field microbead development on capacitance signal through quantitative derivation; 3. Construct a multi-objective comprehensive optimization model to provide theoretical support for the parameter design of the synchronous recording device; 4. Adapt to scenarios such as industrial robots and extreme environments, and greatly improve the stability and reliability of the equipment.
[0070] In this embodiment, the design method has the following beneficial effects: 1. It integrates passive physical development and active electron acquisition functions, resulting in excellent overall performance.
[0071] 2. Quantitative analysis is performed based on the theory of magnetoelectric coupling balance, which effectively eliminates magnetoelectric coupling interference and ensures high operational reliability.
[0072] 3. The use of a transparent insulating adhesive layer to achieve interlayer composite does not interfere with the operation of the magnetic and electrical systems, resulting in a stable structure and strong practicality.
[0073] 4. It has a wide range of applications and can meet the needs of industrial robots, explosion-proof sites, field operations, passive electronic tags, etc.
[0074] 5. The materials used are common, the preparation process is simple, the production cost is low, and it is conducive to large-scale production.
[0075] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. A design method for a magnetoelectric coupling balanced passive dual-mode synchronous recording device, characterized in that, The design method includes: Magnetic microspheres are filled into the receiving cavity of the substrate, and a sealing layer is covered on the surface of the substrate to seal the receiving cavity, forming a magnetic microsphere plate layer. A colloid is uniformly coated on the sealing layer surface of the magnetic microbead plate layer to form an adhesive layer. The capacitor substrate and the conductive film are bonded together to form a flexible capacitor screen layer; The capacitor substrate of the flexible capacitor screen layer is attached to the surface of the uncured adhesive layer and pressed to bond the flexible capacitor screen layer to the magnetic microbead layer, thereby obtaining a layered composite component. The synchronous transmission module is connected to the layered composite component via signal transmission. The synchronous transmission module is used to acquire handwriting coordinates and pressure signals, and is used for real-time transmission and storage of the signals.
2. The design method according to claim 1, characterized in that, After bonding the capacitor substrate of the flexible capacitor screen layer to the surface of the uncured adhesive layer and pressing it to bond the flexible capacitor screen layer to the magnetic microsphere layer to obtain a layered composite component, the design method further includes: The border wraps around the edge of the layered composite component.
3. The design method according to claim 1, characterized in that, After filling the receiving cavity of the substrate with magnetic microspheres and covering the substrate surface with a sealing layer to close the receiving cavity, forming a magnetic microsphere plate layer, the design method further includes: The magnetic microsphere plate layer was verified to have a gradient driving force exerted by the magnetic field on the magnetic microspheres that is greater than the sum of all resistances hindering the movement of the magnetic microspheres, i.e.: ； Substituting the physical expressions for each force, we obtain the complete development kinetic equation: ； in, Gradient driving force; This refers to sliding friction resistance; Viscosity resistance; For the elastic resistance of the sealing layer; The diameter of a single magnetic microsphere; The vacuum permeability; The magnetic susceptibility of the magnetic microspheres; The magnetic flux density gradient; The coefficient of kinetic friction; Density of magnetic microspheres; It is the acceleration due to gravity; To determine the viscosity of the filling medium; The velocity of the magnetic microspheres; This represents the maximum close-packed filling ratio. The volume fill rate of magnetic microspheres; The Young's modulus of the sealing layer; This represents the maximum deformation of the sealing layer; This refers to the thickness of the sealing layer.
4. The design method according to claim 3, characterized in that, After bonding the capacitor substrate and the conductive film to form a flexible capacitor screen layer, the design method further includes: The flexible capacitor screen layer was verified, and the capacitance change was affected by pressure deformation, magnetoelectric effect, and circuit dynamic response. The relative capacitance change can be expressed as: ； After expansion, the complete acquisition accuracy equation is obtained: ； ； ； in, This represents the relative change in ideal capacitance. This represents the actual change in capacitance. This is the correction factor for magneto-induced dielectric interference; This is the dynamic response correction factor; The base capacitance of the flexible capacitive screen layer; This is the minimum detectable relative capacitance change threshold for the capacitance acquisition circuit. The normal pressure applied by the pen tip to the flexible capacitive screen layer; for place Magnetic flux density over time y is the x-coordinate and y is the y-coordinate; To accommodate the compression deformation of the adhesive layer; The thickness of the adhesive layer; The Young's modulus of the adhesive layer; The thickness of the flexible capacitive touchscreen layer; This refers to the effective contact area of the pen tip. The magnetoelectric dielectric constant of the adhesive; This refers to the resistance of the electrode lines of a flexible capacitive touchscreen.
5. The design method according to claim 4, characterized in that, After bonding the capacitor substrate of the flexible capacitor screen layer to the surface of the uncured adhesive layer and pressing it to bond the flexible capacitor screen layer to the magnetic microsphere layer to obtain a layered composite component, the design method further includes: Both the magnetic microbead layer and the flexible capacitive screen layer are jointly verified, and the total interference error rate of the magnetic field on the capacitance acquisition is the sum of the two: ； Substituting the physical expressions for each error term, we obtain the critical condition for suppressing magneto-electric coupling interference: ； in, This is due to the error caused by the magnetoelectric effect. This is due to the polarization effect error of the magnetic microbeads; The relative permittivity of the capacitive touchscreen substrate is _____. The relative permittivity of the adhesive layer; It is the vacuum permittivity; The electric field strength driving the capacitive touchscreen; For driving voltage, ; This represents the local electric field intensity caused by the polarization of the magnetic microspheres.
6. A magnetoelectric coupled balanced passive dual-mode synchronous recording device, manufactured using the design method described in any one of claims 1-5, characterized in that, include: A layered composite component includes a magnetic microbead layer, a flexible capacitive screen layer, and an adhesive layer between the flexible capacitive screen layer and the magnetic microbead layer. The flexible capacitive screen layer has wiring terminals on its side. A synchronous transmission module is connected to the terminal block. The synchronous transmission module is used to receive the handwriting coordinates and pressure signals collected by touch, and to transmit and archive them in real time.
7. The recording device according to claim 6, characterized in that, The synchronous recording device also includes a frame and an erasing module. The frame is used to wrap the edge of the layered composite component. The erasing module is used to disturb the arrangement of magnetic microbeads by relying on a magnetic field.
8. The synchronous recording device according to claim 6, characterized in that, The magnetic microbead plate layer includes a substrate, magnetic microbeads, and a sealing layer; The substrate has uniformly distributed receiving cavities inside, the diameter of which is between 0.1 mm and 0.2 mm, and the depth of which is between 0.05 mm and 0.15 mm. The magnetic microspheres are located within the receiving cavity of the substrate, and the diameter of the magnetic microspheres is between 30μm and 80μm. The sealing layer is used to seal the receiving cavity, and the thickness of the sealing layer is between 0.05mm and 0.1mm.
9. The synchronous recording device according to claim 6, characterized in that, The flexible capacitive screen layer includes a capacitor substrate and a conductive film. The thickness of the flexible capacitive screen layer is between 0.1mm and 0.2mm, and the base capacitance of the flexible capacitive screen layer is between 100pF and 500pF.
10. The synchronous recording device according to claim 6, characterized in that, The adhesive layer is made of optically transparent adhesive, and the thickness of the adhesive layer is between 0.1mm and 0.3mm.