Intelligent teenager ball training wall device, training system and training method

Abstract

The invention discloses an intelligent teenager ball training wall device which comprises a plurality of wall plate units capable of being spliced, and each wall plate unit comprises a wall plate body and a surface interaction thin plate. The surface interaction thin plate sequentially comprises a polycarbonate protective layer, an electrochromic display layer, a transparent electrode layer, a pressure sensing layer and a polyimide substrate layer from outside to inside. A dynamic deformation layer is arranged on the inner side of the surface interaction thin plate and comprises a shape memory alloy net, the edge of the shape memory alloy net is fixedly connected to the surface interaction thin plate, and a plurality of deformation sensors are distributed on the shape memory alloy net; an edge calculation processor is also integrated in the inner cavity of the wallboard main body; the multiple wallboard units are mechanically connected and electrically connected through the connecting pieces, and the extensible training wall face is formed. The device realizes leap-over upgrade from a fixed tool to an intelligent coach, and has the advantages of improving the training efficiency, reducing the professional threshold and realizing interesting exercise experience.

Description

Technical Field

[0001] The invention relates to the field of fitness training equipment, and in particular to an intelligent youth ball training wall device, a training system and a training method. Background Art

[0002] In the introductory training of ball sports, many beginners choose to practice hitting, catching and moving their feet facing a concrete wall. However, this training method has many limitations: the single horizontal facade of the concrete wall makes the rebound direction and route of the ball lack variation and easy to predict, which makes it easy for beginners to intercept and return the ball without quick reaction, making it difficult to effectively improve their reaction ability and exercise volume; the concrete wall cannot distinguish between the target area and the defense area, making it difficult to simulate the confrontation scene in real ball sports, which is not conducive to beginners mastering practical skills.

[0003] Chinese patent publication number CN111228765A discloses a training wall assembly unit and a training wall assembled using the assembly unit. The assembly unit comprises a square wall panel and two hinges. The wall panels are hinged horizontally and fixed vertically to form a training wall. The training wall rotates along the hinge to form several wall facades in different planes. The bottom edge of the wall forms a cross to be self-supporting. Multiple facades are conducive to the changing direction and route of the ball's hitting and returning, and are conducive to simulating confrontational training of receiving and serving. This technical solution realizes modular design, adjustable angle, and is easy to assemble and move. However, its single function and fixed mechanical characteristics make it a passive training, mainly used for ball rebound training, lack of interactivity and data feedback, and low degree of intelligence. Summary of the invention

[0004] In view of the shortcomings and deficiencies of the prior art, the present invention aims to provide an intelligent youth ball training wall device that improves training efficiency, lowers professional barriers and reshapes the sports experience.

[0005] The specific technical solutions of the present invention are as follows:

[0006] The present invention provides an intelligent youth ball training wall device, comprising a plurality of splicable wall panel units, the wall panel units are provided with connectors, each of the wall panel units comprises a wall panel body with a surface depression as a cavity structure and a surface interactive thin plate arranged on the surface of the wall panel body, the surface interactive thin plate comprises a polycarbonate protective layer, an electrochromic display layer, a transparent electrode layer, a pressure sensing layer and a polyimide base layer in sequence from the outside to the inside; a dynamic deformation layer is arranged on the inner side of the surface interactive thin plate, the dynamic deformation layer comprises a shape memory alloy mesh whose edge is fixed to the surface interactive thin plate, and a plurality of deformation sensors are distributed on the shape memory alloy mesh; an edge computing processor is also integrated in the inner cavity of the wall panel body; a conductive path is integrated in the alloy wire of the shape memory alloy mesh, and current input is controlled by the edge computing processor;

[0007] The plurality of wall panel units are mechanically connected and electrically interconnected via connectors to form an expandable training wall.

[0008] In a preferred technical solution, the connector is a truncated cone-shaped pivot and a limiting circular groove that can be plugged into each other at both sides of the wall panel body, and the truncated cone-shaped pivot and the limiting circular groove are both provided with a magnetic electronic interface that can be connected to each other, and the magnetic electronic interface has a power supply contact and a data communication contact. Preferably, an NFC identification chip is embedded in the truncated cone-shaped pivot of the connector.

[0009] Another preferred technical solution is that a connecting portion is protruding outwardly from the middle portion of the upper side of the wall panel main body, and plug-in grooves are dug at both ends of the connecting portion; a connecting groove is recessed inwardly from the middle portion of the lower side of the wall body, and transverse through holes are provided on the wall panel main body parts at both ends of the connecting groove, and a receiving groove with a larger aperture than that of the transverse through hole is dug at the outer end portion of the transverse through hole; the connecting portion cooperates with the connecting groove and is connected by a latch, and the outer end of the latch is provided with a latch head that cooperates with the receiving groove.

[0010] The second aspect of the present invention discloses a training system using the above-mentioned intelligent youth ball training wall device, the system comprising

[0011] A wall surface forming module is configured to drive the wall surface to be deformed into a target curvature according to target surface parameters;

[0012] A data acquisition module, configured to obtain the impact force, position and wall deformation data in real time through the pressure sensing layer and the deformation sensor;

[0013] An edge computing module, integrated inside the main wall panel unit, configured to process commands issued by the user or generate training feedback commands based on the collected data;

[0014] A multimodal feedback module, configured to display a thermal map of the striking force by partitioning the electrochromic display layer, and configured to partially concave the dynamic deformation layer to form a physical guiding surface when a continuous action error is detected;

[0015] The AR projection guidance module projects a virtual training scene on the wall through a short-throw laser projector installed in front of the training wall;

[0016] The user interaction interface is a touch panel integrated on the wall panel unit on one side of the training wall, which supports voice command input and touch operation.

[0017] In a further embodiment, the system further comprises:

[0018] The wall unit identification module authenticates the identity of the corresponding wall panel unit through the NFC identification chip of the connector, and realizes automatic topological networking and firmware synchronization of adjacent wall panel units;

[0019] Adaptive training plan module, dynamically adjusts training difficulty based on user's real-time performance;

[0020] The cloud synchronization unit uploads the training data to the server to generate a periodic posture change comparison model and customized training suggestions.

[0021] Based on the above training wall and training system, the present invention discloses a football training method, comprising the following steps:

[0022] Step S1: Activate the football training mode through the NFC chip, the user selects the target convex surface parameters, and the wall is deformed into the target convex surface;

[0023] Step S2: AR projection generates a dynamic target area, and a red restricted area warning band is displayed outside the target area. If the restricted area is hit, points will be deducted;

[0024] Step S3: Automatically adjust training parameters according to the shooting accuracy:

[0025] After hitting three times in a row, the target area diameter is reduced by 10% and the moving speed is increased by 0.2m / s;

[0026] After two consecutive mistakes, the electrochromic layer displays a yellow correction guide line, and the wall is partially concave to guide the ball path;

[0027] Step S4: After the training is completed, score and generate a training report.

[0028] Based on the above invention principle, the beneficial effects of the present invention are as follows:

[0029] The intelligent youth ball training wall device of the present invention quickly splices multiple wall panel units through magnetic connectors (truncated cone pivots and limiting circular grooves) to form an expandable training wall surface, which supports free horizontal and vertical combinations; walls of different sizes can be flexibly constructed according to training needs, such as a 5×5 meter football shooting wall or a 3×2 meter reaction training wall. It can be configured into multiple training modes such as football, basketball, boxing, etc., and one wall can be used for multiple purposes.

[0030] The training device uses a shape memory alloy mesh (SMA) to change the curvature through Joule heating, realizes dynamic adjustment of the wall curvature, and combines with deformation sensors for real-time calibration; it can be used to simulate the curvature of a human wall in football training and generate rebound slopes in tennis training. The device also detects the maximum force and position through the pressure sensing layer, and displays the hitting heat map and dynamic target area in real time through the electrochromic display layer, which can guide users to adjust the shooting angle and hitting force in real time. The wall panel has a built-in edge computing processor, which processes data locally and generates control instructions, which can analyze the trajectory of football shots, predict the rebound path, and adjust the wall deformation in real time.

[0031] The training device and system have achieved a leapfrog upgrade from fixed tools to smart coaches through four core technologies: modular design, dynamic deformation, multimodal feedback, and edge computing. It has the advantages of improving training efficiency, lowering professional barriers, and reshaping sports experience. Its game-like training method is very interesting and is particularly suitable for youth training. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a wall panel unit of an intelligent youth ball training wall device;

[0033] Figure 2 Schematic diagram of the multilayer structure of the surface interactive thin plate;

[0034] Figure 3 It is a connection diagram of the truncated cone-shaped pivot and the limiting circular groove for phase insertion;

[0035] Figure 4 It is a schematic diagram of the assembly of the connecting parts and connecting grooves of adjacent wall panel bodies;

[0036] Figure 5 It is a schematic diagram of an implementation in the state of splicing wall panel units;

[0037] Figure 6 The present invention is a schematic diagram of the functional module structure of a training system for an intelligent ball training wall. DETAILED DESCRIPTION

[0038] The present invention provides a modular intelligent ball training wall device and system, which is composed of a plurality of splicable wall panel units, each unit integrating five layers of composite interactive thin plates: polycarbonate protective layer / electrochromic display layer / transparent electrode layer / pressure sensing layer / substrate; and dynamic deformation layer: shape memory alloy mesh + deformation sensor. The wall panel units are connected by magnetic connectors to achieve rapid mechanical splicing and intelligent networking. The system includes surface control, multimodal feedback and cloud data analysis functions, which can dynamically adjust the wall curvature, target area size and rebound hardness according to football training needs, generate real-time mechanical reports such as hitting force and trajectory deviation, and enhance the fun of training through gamification interaction.

[0039] The following examples further illustrate the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and substance of the present invention, modifications or substitutions made to the method, steps or conditions of the present invention all fall within the scope of the present invention.

[0040] Example 1

[0041] Figure 1-2As shown, the intelligent youth ball training wall device includes a plurality of connectable wall panel units 1, each of which is provided with a connecting piece, and each of the wall panel units 1 includes a wall panel body 10 with a surface depression as a cavity structure and a surface interactive thin plate 2 arranged on the surface of the wall panel body 10, and the side of the surface interactive thin plate 2 is connected to the upper surface edge of the wall panel body 10 and can also be coated on the side edge of the wall panel body 10, and the surface interactive thin plate 2 includes, from the outside to the inside, a polycarbonate protective layer 20, an electrochromic display layer 21, a transparent electrode layer 22, a pressure sensing layer 23 and a polyimide base layer 24. A dynamic deformation layer 3 is arranged inside the surface interaction thin plate 2, and the dynamic deformation layer 3 includes a shape memory alloy mesh 30 whose edge is fixed to the surface interaction thin plate 2, and a plurality of deformation sensors 31 are distributed on the shape memory alloy mesh 30; an edge computing processor 4 is also integrated in the inner cavity of the wall panel body 10, and a conductive path is integrated in the alloy wire of the shape memory alloy mesh 30, and the current input is controlled by the edge computing processor; a plurality of the wall panel units 1 are mechanically connected and electrically interconnected through connectors to form an expandable training wall. In a specific scheme, the edge of the wall panel body 10 is provided with a slightly convex edge connected to the surface interaction thin plate 2, and the shape memory alloy mesh 30 is placed inside the edge. The characteristic of the shape memory alloy is that it will return to a preset shape after heating. When the current passes through, the alloy mesh shrinks or bends due to heat, driving the surface interaction thin plate to produce physical changes. The deformation sensors 31 are distributed on the alloy mesh, which are used to detect the degree of deformation and feed back to the edge computing processor 4. The processor 4 sends a signal according to the training program to control the current in different areas, thereby adjusting the deformation mode. The purpose of the dynamic deformation layer is to simulate the rebound effect of different ball sports, so the deformation is based on training needs, such as changing the hardness or concave and convex shape of the wall to adapt to different training scenarios.

[0042] The connection methods between the layers of the surface interactive thin plate include the following methods. The polycarbonate protective layer 20 is a transparent material, which is convenient for observing the color change of the electrochromic display layer. The electrochromic display layer 21 is attached to the inner side of the polycarbonate protective layer 20 by a sputtering film process. Sputtering is a physical vapor deposition method for forming a uniform electrochromic material film on the surface of polycarbonate. The transparent electrode layer 22 is coated on the inner side of the electrochromic display layer 21 by a graphene printing process. The electrode edge can be designed with a serpentine routing to ensure that the electrochromic display layer 21 and the transparent electrode layer 22 form an ohmic contact. The transparent electrode layer 22 and the pressure sensing layer 23 are bonded with an optically transparent adhesive. Silicon dioxide nanoparticles can be added to the adhesive layer to ensure electrical isolation and optical transmission. The pressure sensing layer 3 is evenly laid on the polyimide base layer 24 by inkjet printing technology; the core training area is densely packed, with 20 points per centimeter; the edge is sparsely packed, and the spacing gradually changes from 5 mm to 20 mm. The wiring of the pressure sensor 3 adopts row-column cross-matrix wiring, and converges to the edge flexible FPC interface after layered routing by silver paste jumpers. Among them, the polycarbonate protective layer adopts a polycarbonate-PU blend material with a thickness of 0.8mm and a certain elongation rate; the transparent electrode layer adopts graphene serpentine grid printing, with a line width of 5μm, a serpentine wavelength of 200μm, and a resistance change of <5% when the elongation rate is greater than 20%; the polyimide base layer has a stretching rate between 30% and 70%, which supports the deformation of the pressure sensor and withstands dynamic bending. When the base layer is deformed outward at 15° (corresponding to a surface tensile strain of about 12%), the stretching rate requirement is only 12%, which is far below the material limit, ensuring a safety margin.

[0043] The deformation sensor 31 is fixed to the shape memory alloy mesh 30 by UV glue dispensing. A plurality of the deformation sensors 31 are arranged in parallel with the alloy wire of the shape memory alloy mesh 30, and the spacing between adjacent deformation sensors 31 is 10 mm. The deformation sensor can be a fiber grating sensor, a resistive strain gauge or a MEMS sensor. The grid spacing of the shape memory alloy mesh 30 is preferably set to 10 mm to ensure high-precision control and monitoring. The deformation alloy mesh is made of pinched titanium alloy wire, has shape memory and resistance characteristics, and can be heated by Joule heat. The integration of the conductive path needs to ensure the effective transmission of current without affecting its mechanical properties. The specific scheme includes coating the surface of the alloy wire, embedding conductive materials or using composite materials. For example, a nano silver layer with a thickness of 200-500nm is sputtered on the surface of the SMA alloy wire as a low-resistance conductive path; an insulating groove is etched on the surface of the coating to divide an independent conductive channel; the coated SMA wire is woven into a 10mm spacing grid, and the intersection is fixed by micro-resistance welding; the grid electrodes converge to the edge flexible connector, and a multiplexer chip is integrated. The flexible circuit board interface is connected to the edge computing processor, and the processor side uses the Samtec Q series which is mechanically compatible with the flexible circuit board socket.

[0044] Figure 3 As shown, the connecting member is a truncated cone-shaped pivot 11 and a limiting circular groove 12 which are arranged on both sides of the wall panel body 10 and can be plugged in. The truncated cone-shaped pivot 11 and the limiting circular groove 12 are both provided with a magnetic electronic interface which can be connected to each other. Figure 4 As shown, reference numeral 111 is a pair of magnetic sheets, and the magnetic electronic interface has a power supply contact 112 and a data communication contact 113. The frustum-shaped pivot 11 and the limiting circular groove 12 of the adjacent wall panel bodies cooperate to achieve horizontal splicing. The power supply contact is connected through the copper foil bus embedded in the wall panel to: the dynamic deformation layer drive circuit: to provide driving current for the shape memory alloy mesh; to the edge computing module: to power the processor; and to the interactive thin plate system: to power the electrochromic display layer and the pressure sensing layer. The data communication contact is connected to the CAN bus network inside the wall panel, connecting the following components: edge computing module: to receive / send control instructions, such as deformation parameters, sensor data; deformation sensor FBG: to access the bus through the optical fiber demodulator and upload strain data; NFC identification chip: to transmit unit identity information and firmware version number.

[0045] The NFC chip is embedded in the truncated cone-shaped pivot 11 of the connector, or the NFC is directly set in the wall panel body. The distance between the NFC chip and the surface of the connector is no more than 2 mm. The NFC chip authenticates the identity of the corresponding wall panel unit and realizes automatic topological networking and firmware synchronization of adjacent wall panel units.

[0046] Figure 4 As shown, a connecting portion 14 is convexly provided at the middle of the upper side of the wall panel body 10, and plug-in grooves 15 are dug at both ends of the connecting portion 14; a connecting groove 16 is concavely provided at the middle of the lower side of the wall panel body 10, and a transverse through hole 17 is provided at the wall panel body 10 at both ends of the connecting groove 16, and a receiving groove 18 with a larger aperture than the transverse through hole 17 is dug at the outer end of the transverse through hole 17; the connecting portion 14 cooperates with the connecting groove 16 and is connected by a bolt 19, and a bolt head 190 is provided at the outer end of the bolt 19 to cooperate with the receiving groove 18. When connected, the connecting portions 14 of adjacent wall panel bodies cooperate with the connecting groove 16 and are longitudinally spliced ​​by the bolt.

[0047] The wall panel unit 1 can be adjusted in size according to actual needs. The preferred standard size is 600mm×600mm×50mm, taking into account both the convenience of transportation and the smoothness of splicing. In a specific embodiment, the thickness of the surface interactive thin plate is 2-4mm, the dynamic deformation layer is 5-8mm, and the thickness of the wall panel body is 15-20mm. The back of the wall panel body can be provided with air holes connected to the cavity to facilitate heat dissipation. When splicing, it can be formed into a training wall according to the required size, such as Figure 5 shown.

[0048] Example 2

[0049] like Figure 6 As shown, the present invention provides a training system for an intelligent ball training wall, the system comprising a wall surface forming module, a data acquisition module, an edge computing module, a multimodal feedback module, an AR projection guidance module and a user interaction interface.

[0050] The wall surface forming module is configured to drive the wall surface to deform into a target curvature according to the target surface parameters. It receives the target curvature parameters, such as a convex arc required for football training and a wavy surface required for boxing training, and drives the shape memory alloy mesh to deform through Joule heating according to the target parameters; the curvature range of the shape memory alloy mesh is ±15°. Its hardware uses an SMA drive circuit board to control the shape memory alloy mesh, which is responsible for power supply and control current to drive deformation; the SMA drive circuit board is set in the internal cavity of the wall panel body close to the dynamic deformation layer; in addition, the alloy mesh node can also be mounted with a temperature sensor.

[0051] The data acquisition module is configured to obtain the impact force, position and wall deformation data in real time through the pressure sensing layer and the deformation sensor. The pressure sensing layer detects the impact position and force, and uses a nano silver wire array embedded in the surface interactive thin plate base layer. The deformation sensor is arranged along the warp direction of the shape memory alloy mesh, and the local strain is measured by the fiber grating sensor.

[0052] The edge computing module is integrated inside the wall panel main unit to process sensor data in real time; it is configured to process instructions issued by the user or generate training feedback instructions based on the collected data;

[0053] The multimodal feedback module is configured to display the striking force heat map by partitioning the electrochromic display layer, and is configured to partially concave the dynamic deformation layer to form a physical guiding surface when a continuous action error is detected. It is also configured with an auditory feedback unit, which plays a hit prompt sound and voice guidance through a directional sound field technology provided on the touch panel side.

[0054] The AR projection guidance module projects a virtual training scene on the wall through a short-throw laser projector arranged in front of the training wall. The projector is independently installed on a bracket directly in front of the training wall, infrared tracking cameras are arranged on both sides of the projector, and high-reflective marking points are attached to the training wall.

[0055] The user interaction interface is integrated into a touch panel on the wall panel unit on one side of the training wall to support voice command input and touch operation. Microphones are arranged linearly above the panel, and LED lights can also be set on the edge.

[0056] The AR projection guidance module may also specifically include the following functions:

[0057] The virtual target generation unit generates dynamic virtual targets on the wall, and the targets automatically adjust their position and size as the training progresses; it uses SLAM spatial positioning technology and dynamic projection mapping technology of a short-throw laser projector;

[0058] The trajectory prediction and correction unit predicts the ball path based on the user's hitting trajectory and displays the recommended correction angle through optical flow arrows; its trajectory prediction uses Kalman filtering technology to predict the object's motion trajectory;

[0059] The scene simulation unit is configured to simulate real game scenes and project the movement trajectories of virtual defensive players to increase the confrontation; it uses existing machine learning toolkits to train players' defensive strategies, and its holographic projection system realizes multi-projection collaboration.

[0060] It should be noted that the AR projection guidance module is widely used in existing virtual game experiences, and its functions are realized based on existing mature projection technology. The present invention applies it to innovative wall panels.

[0061] The system also includes a wall unit identification module, an adaptive training plan module and a cloud synchronization unit.

[0062] The wall unit identification module authenticates the identity of the corresponding wall panel unit through the NFC identification chip of the connector, and realizes the automatic topological networking and firmware synchronization of adjacent wall panel units. The role of the NFC identification chip is to identify the identity of each wall panel unit, such as a football training board or a boxing board. When these units are spliced ​​together, the module will automatically network to form an overall system and synchronize the firmware version. After each wall panel unit is correctly identified and networked, the system knows the position and type of each unit, so that when the shape of the curved surface needs to be changed, all units can be coordinated to adjust together, such as making the middle unit convex and the edge units flat, so as to form the required overall curvature. For example, when playing football, 6 wall panels are assembled into an arc, and the system immediately knows that this is the "human wall simulation mode", making the two middle panels convex (simulating the chest of the defensive player) and the four left and right panels slightly concave (simulating the leg gap); at this time, when shooting, the ball will bounce back when it hits the convex area, and pass through the "human wall" when it hits the concave area.

[0063] The adaptive training plan module dynamically adjusts the training difficulty according to the user's real-time performance, such as the target area shrinkage speed and the wall deformation curvature.

[0064] The cloud synchronization unit uploads the training data to the server to generate a periodic body posture change comparison model and customized training suggestions.

[0065] Example 3

[0066] In another specific system application example, the football training method of the training system includes the following steps:

[0067] Step S1: Activate the football training mode through the NFC chip, the user selects the target convex surface parameters, and the wall is deformed into the target convex surface;

[0068] Step S2: AR projection generates a dynamic target area, and a red restricted area warning band is displayed outside the target area. If the restricted area is hit, points will be deducted;

[0069] Step S3: Automatically adjust training parameters according to the shooting accuracy:

[0070] After hitting three times in a row, the target area diameter is reduced by 10% and the moving speed is increased by 0.2m / s;

[0071] After two consecutive mistakes, the electrochromic layer displays a yellow correction guide line, and the wall is partially concave to guide the ball path;

[0072] Step S4: After the training is completed, score and generate a training report, which includes:

[0073] In step S1, the user selects the target convex surface parameters, and the wall surface is deformed into the target convex surface, specifically including:

[0074] Generate target surface parameters according to the training type selected by the user;

[0075] Applying current to the shape memory alloy mesh to raise its temperature to a preset temperature range, driving the wall surface to deform into a target curvature;

[0076] The actual curvature is monitored by deformation sensors, and the current parameters are dynamically adjusted to match the target deformation.

[0077] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0078] The above is only a specific embodiment of the present invention, but the protection scope of the present invention 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 by the present invention 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. An intelligent youth ball training wall device, comprising a plurality of connectable wall panel units, each of which is provided with a connecting piece, characterized in that: Each of the wall panel units comprises a wall panel body with a surface depression as a cavity structure and a surface interactive thin plate arranged on the surface of the wall panel body, wherein the surface interactive thin plate comprises a polycarbonate protective layer, an electrochromic display layer, a transparent electrode layer, a pressure sensing layer and a polyimide base layer from the outside to the inside; a dynamic deformation layer is arranged on the inner side of the surface interactive thin plate, wherein the dynamic deformation layer comprises a shape memory alloy mesh whose edge is fixed to the surface interactive thin plate, and a plurality of deformation sensors are distributed on the shape memory alloy mesh; an edge computing processor is also integrated in the inner cavity of the wall panel body; a conductive path is integrated in the alloy wire of the shape memory alloy mesh, and current input is controlled by the edge computing processor; The plurality of wall panel units are mechanically connected and electrically interconnected via connectors to form an expandable training wall.

2. The intelligent youth ball training wall device according to claim 1, characterized in that: The electrochromic display layer is attached to the inner side of the polycarbonate protective layer by using a sputtering film process, the transparent electrode layer is coated on the inner side of the electrochromic display layer by using a graphene printing process, the transparent electrode layer and the pressure sensing layer are bonded with an optically transparent adhesive, and the pressure sensing layer is combined with the polyimide base layer by inkjet printing.

3. The intelligent youth ball training wall device according to claim 1, characterized in that: The deformation sensor is fixed to the shape memory alloy mesh by using UV glue dispensing, and a plurality of the deformation sensors are arranged in parallel with the alloy wires of the shape memory alloy mesh, and the spacing between adjacent deformation sensors is 10 mm.

4. The intelligent youth ball training wall device according to claim 1, characterized in that: The connecting part is a frustoconical pivot and a limiting circular groove which are arranged on both sides of the wall panel body and can be plugged into each other. The docking positions of the frustoconical pivot and the limiting circular groove are provided with magnetic electronic interfaces that can dock with each other. The magnetic electronic interface has power supply contacts and data communication contacts.

5. The intelligent youth ball training wall device as claimed in claim 4, characterized in that: An NFC identification chip is embedded inside the truncated cone-shaped pivot of the connecting piece, and the distance between the NFC identification chip and the surface of the connecting piece is no more than 2 mm.

6. The intelligent youth ball training wall device according to claim 1, characterized in that: A connecting portion is protruding outwardly from the middle portion of the upper side of the wall panel main body, and plug-in grooves are dug at both ends of the connecting portion; a connecting groove is recessed inwardly from the middle portion of the lower side of the wall body main body, and transverse through holes are provided on the wall panel main body parts at both ends of the connecting groove, and a receiving groove with a larger aperture than that of the transverse through hole is dug at the outer end of the transverse through hole; the connecting portion cooperates with the connecting groove and is connected by a latch, and a latch head is provided at the outer end of the latch to cooperate with the receiving groove.

7. A training system for the intelligent youth ball training wall device according to any one of claims 1 to 5, characterized in that: The system comprises A wall surface forming module is configured to drive the wall surface to be deformed into a target curvature according to target surface parameters; A data acquisition module, configured to obtain the impact force, position and wall deformation data in real time through the pressure sensing layer and the deformation sensor; An edge computing module, integrated inside the main wall panel unit, configured to process commands issued by the user or generate training feedback commands based on the collected data; A multimodal feedback module, configured to display a thermal map of the striking force by partitioning the electrochromic display layer, and configured to partially concave the dynamic deformation layer to form a physical guiding surface when a continuous action error is detected; The AR projection guidance module projects a virtual training scene on the wall through a short-throw laser projector installed in front of the training wall; The user interaction interface is a touch panel integrated on the wall panel unit on one side of the training wall, which supports voice command input and touch operation.

8. The intelligent ball training wall system according to claim 7, characterized in that: The system further comprises: The wall unit identification module authenticates the identity of the corresponding wall panel unit through the NFC identification chip of the connector, and realizes automatic topological networking and firmware synchronization of adjacent wall panel units; Adaptive training plan module, dynamically adjusts training difficulty based on user's real-time performance; The cloud synchronization unit uploads the training data to the server to generate a periodic posture change comparison model and customized training suggestions.

9. A football training method using the training system according to claim 7, characterized in that: The following steps are involved: Step S1: Activate the football training mode through the NFC chip, the user selects the target convex surface parameters, and the wall is deformed into the target convex surface; Step S2: AR projection generates a dynamic target area, and a red restricted area warning band is displayed outside the target area. If the restricted area is hit, points will be deducted; Step S3: Automatically adjust training parameters according to the shooting accuracy: After hitting three times in a row, the target area diameter is reduced by 10% and the moving speed is increased by 0.2m / s; After two consecutive mistakes, the electrochromic layer displays a yellow correction guide line, and the wall is partially recessed to guide the ball path; Step S4: After the training is completed, score and generate a training report.

10. The football training method according to claim 9, characterized in that: In step S1, the user selects the target convex surface parameters, and the wall surface is deformed into the target convex surface, specifically including: Generate target surface parameters according to the training type selected by the user; Applying current to the shape memory alloy mesh to raise its temperature to a preset temperature range, driving the wall surface to deform into a target curvature; The actual curvature is monitored by deformation sensors, and the current parameters are dynamically adjusted to match the target deformation.

Images