Implementation method and system of anti-metal NFC antenna module

Abstract

The invention relates to the technical field of near field communication, and discloses an implementation method and system of an anti-metal NFC antenna module, and the anti-metal NFC antenna module comprises a Touch metal sensor network, an NFC antenna coil and a soft magnetic material sheet which are arranged from top to bottom. The method comprises the following steps: configuring the NFC antenna coil below the Touch metal sensor net at a preset interval, and attaching the soft magnetic material sheet to one side, deviating from the Touch metal sensor net, of the NFC antenna coil; establishing an electromagnetic simulation model, carrying out collaborative optimization on a grid pattern of the Touch metal sensor net and wiring of the NFC antenna coil, and enhancing metal interference resistance through magnetic field focusing; performance consistency testing and grading are carried out on the anti-metal NFC antenna module in the production process of the anti-metal NFC antenna module, real-time performance monitoring is carried out on the anti-metal NFC antenna module in the use and operation process, dynamic calibration of module parameters is achieved, and the problem that NFC signals are interfered by the metal environment is basically solved.

Description

Technical Field

[0001] This invention relates to the field of near-field communication technology, and in particular to a method and system for implementing an anti-metal NFC antenna module. Background Technology

[0002] With the widespread application of Near Field Communication (NFC) technology in mobile payments, identity verification, device pairing, and the Internet of Things (IoT), the requirements for the integration and structural design of electronic devices are becoming increasingly stringent. NFC technology, based on the principle of magnetic field coupling, achieves short-range data exchange through antenna coils. Its communication performance is closely related to parameters such as the antenna's inductance, resistance, and quality factor, and is highly susceptible to the influence of the surrounding metallic environment. Metallic materials generate eddy currents in alternating magnetic fields, leading to magnetic energy dissipation, reduced antenna efficiency, and resonant frequency shifts; in severe cases, it can even cause complete communication failure. This "metal interference" problem has become a key bottleneck restricting the widespread adoption of NFC technology in modern electronic products that pursue a metallic feel and integrated appearance.

[0003] In existing technologies, to avoid interference from metal, the conventional approach is to place the NFC antenna in a non-metallic area within the device, such as a plastic frame, glass back cover, or a dedicated "clearance area" beneath the screen. While this method ensures antenna performance to some extent, it severely restricts the freedom of industrial design, resulting in a disjointed appearance and occupying valuable internal space. Meanwhile, as users' demands for device interaction experience increase, touch-sensing components with metallic surfaces (such as the metal decorative rings or casings of some devices) are being given touch control functions to achieve more intuitive operation. However, if the goal is to integrate NFC functionality under such metallic touch areas, the inherent electromagnetic incompatibility between the metal material required for touch sensing and the NFC antenna becomes apparent.

[0004] Currently, although some studies have attempted to suppress eddy currents by adding soft magnetic shielding sheets such as ferrite between the antenna and the metal, single-material shielding solutions are often ineffective when dealing with metal mesh panels that also have touch sensing capabilities. This is because while simple shielding layers can reduce the negative impact of the metal on the antenna, they struggle to accurately balance the magnetic field transmission efficiency required for NFC communication with the capacitive sensing sensitivity relied upon by the touch sensor. There is an inherent conflict between the two requirements regarding the electromagnetic properties of the metallic environment: NFC requires the magnetic field to penetrate the metal without loss, while the touch sensor needs a stable capacitive field distribution for accurate detection.

[0005] Therefore, there is an urgent need in this field for an integrated solution that can fundamentally and synergistically resolve the aforementioned contradictions. The ideal solution should not be a compromise of functionality or performance, but rather a high-performance coexistence of NFC communication and touch control functions within the limited physical space of a metal touch panel through novel structural design and electromagnetic optimization methods. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an anti-metal NFC antenna module. By arranging NFC antenna coils at intervals below the Touch metal sensor network and attaching them with a soft magnetic material sheet, the interference problem of the metal environment on NFC signals is solved, and high-performance integration of touch sensing and NFC communication on the metal surface is achieved.

[0007] On one hand, a method for implementing an anti-metal NFC antenna module is provided. The anti-metal NFC antenna module includes a Touch metal sensor network, an NFC antenna coil, and a soft magnetic material sheet arranged from top to bottom. The method includes the following steps: S1: The NFC antenna coil is arranged at a preset interval below the Touch metal sensor network. The soft magnetic material sheet is attached to the side of the NFC antenna coil opposite to the Touch metal sensor network. The NFC antenna coil is electrically connected to an external NFC function module through a first conductive connection line, and the Touch metal sensor network is electrically connected to the whole device sensor electronic module through a second conductive connection line. S2: Establish an electromagnetic simulation model including the Touch metal sensor network, the NFC antenna coil, and the soft magnetic material sheet. Within the electromagnetic simulation model, optimize the mesh pattern of the Touch metal sensor network and the routing of the NFC antenna coil in a coordinated manner, and enhance the anti-metal interference capability by focusing the magnetic field. S3: The anti-metal NFC antenna module is subjected to performance consistency testing and grading during the production process, and the anti-metal NFC antenna module is monitored in real time during use and operation to achieve dynamic calibration of module parameters.

[0008] Further, in step S1, the method for determining the preset interval includes: The electromagnetic simulation model simulates the magnetic field distribution intensity of the NFC antenna coil and the capacitive sensing sensitivity of the Touch metal sensor network under different interval distances. With the common goals of maximizing NFC card reading distance and optimizing Touch sensor sensitivity, a multi-objective optimization algorithm is used to determine the optimal interval distance value.

[0009] Preferably, the method for selecting and configuring the soft magnetic material sheet includes: According to the target operating frequency of the NFC antenna coil Selecting a frequency with high permeability With low loss tangent Soft magnetic materials; Based on the metal mesh density of the Touch metal sensor network and the preset interval, the minimum theoretical thickness of the required soft magnetic material sheet is calculated using the following formula. To effectively guide the magnetic field: in, The permeability of free space, The electrical conductivity of the metal material in the Touch metal sensor network is given. This is a correction factor related to the mesh aperture ratio.

[0010] Furthermore, in step S2, the mesh pattern of the Touch metal sensor network and the routing of the NFC antenna coil are optimized in a coordinated manner: Obtain the baseline capacitance value of the Touch sensor and the initial inductance value of the NFC antenna under the initial grid pattern; The metal coverage of the grid pattern and the turn spacing of the NFC antenna coil are used as collaborative design variables; The design variables are iteratively adjusted in the electromagnetic simulation software until the following conditions are met simultaneously: the capacitance change of the touch sensor is greater than the action threshold, and the actual resonant frequency of the NFC antenna falls within the permissible range.

[0011] Further, in step S2, the magnetic field focusing includes: The weak areas of the magnetic field generated by the NFC antenna coil under the influence of the metal mesh of the Touch metal sensor network were determined by electromagnetic simulation model. Based on the magnetic field distribution, the shape and area of ​​the soft magnetic material sheet are customized so that its outline extends beyond the outer edge of the NFC antenna coil by a certain width. ,in satisfy: in, The outer perimeter of the NFC antenna coil is given. This is a focusing factor related to the permeability of soft magnetic materials, which is used to converge magnetic field lines and increase the strength of the positive magnetic field.

[0012] Further, in step S3, the dynamic calibration of the module parameters includes: During device operation, the bit error rate (BER) of NFC communication and the signal-to-noise ratio (SNR) of the touch sensor are periodically collected. If the BER exceeds the first threshold or the SNR is lower than the second threshold, the module performance is determined to be degraded, and the calibration process is initiated. The variable capacitor in the matching circuit connected to the NFC antenna coil is fine-tuned according to the following relationship. To compensate for frequency drift: in, For negative feedback coefficients, The target bit error rate.

[0013] Further, in step S3, the performance consistency test and grading includes: The module's card reading success rate was tested using a standard NFC card reader at a fixed distance and orientation, and its maximum effective communication distance was recorded. The response accuracy and linearity of the Touch metal sensor network were tested using an automated touch simulation device. The maximum effective communication distance, response accuracy, and linearity are used as test results and compared with the preset performance benchmark range to classify the modules into different performance levels for use in products of different grades.

[0014] Preferably, in step S2, the establishment of the electromagnetic simulation model further includes: Analyze the impact of other metal components in the electromagnetic simulation model on the performance of the anti-metal NFC antenna module; Based on the simulation results, the internal layout of the whole machine and the installation position of the module were adjusted in a coordinated manner to ensure that the card reading distance of the NFC antenna coil and the sensitivity of the Touch metal sensor network in the final product both meet the design requirements.

[0015] More preferably, in step S1, the whole-machine sensor electronic module is used to receive and process signals from the Touch metal sensor network to realize the recognition and response to metal touch actions; The Touch metal sensor network is configured as an external environmental metal component of the anti-metal NFC antenna module, providing an integrated metal mesh panel for the NFC antenna while detecting trigger events.

[0016] On the other hand, a system for implementing an anti-metal NFC antenna module is provided. The anti-metal NFC antenna module includes a Touch metal sensor network, an NFC antenna coil, and a soft magnetic material sheet arranged from top to bottom. The system includes: The hardware design module is used to arrange the NFC antenna coil at a preset interval below the Touch metal sensor network, attach the soft magnetic material sheet to the side of the NFC antenna coil opposite to the Touch metal sensor network, electrically connect the NFC antenna coil to an external NFC function module through a first conductive connection line, and electrically connect the Touch metal sensor network to the whole device sensor electronic module through a second conductive connection line. The simulation design optimization module is used to establish an electromagnetic simulation model including the Touch metal sensor network, the NFC antenna coil, and the soft magnetic material sheet. Within the electromagnetic simulation model, the grid pattern of the Touch metal sensor network and the routing of the NFC antenna coil are optimized in a coordinated manner, and the anti-metal interference capability is enhanced by magnetic field focusing. The production operation optimization module is used to perform performance consistency testing and grading on the anti-metal NFC antenna module during the production process, and to perform real-time performance monitoring on the anti-metal NFC antenna module during use and operation, so as to realize dynamic calibration of module parameters.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention integrates NFC antenna coils at preset intervals below the Touch metal sensor network and attaches a soft magnetic material sheet to the back of the coil, thus constructing a multi-layer module that works in concert. This allows NFC functionality to be stably integrated under the metal surface, fundamentally solving the problem of shielding and interfering with the NFC magnetic field in the metal environment, and achieving high-performance coexistence of touch control and NFC communication in a metal environment. This invention uses electromagnetic simulation to accurately determine the optimal spacing between the NFC antenna and the metal mesh plate. At the same time, the coordinated design of the metal mesh pattern and the antenna wiring ensures that the requirements of NFC antenna resonant frequency and card reading distance are met without sacrificing the capacitance change and response accuracy of the touch sensor, thus achieving the optimal balance between the two functional parameters. This invention uses a dynamic calibration algorithm to enable the module to automatically fine-tune the matching circuit parameters based on the monitored NFC bit error rate and Touch signal-to-noise ratio during actual operation. This allows the module to compensate for performance drift caused by factors such as component aging and temperature changes, significantly improving the reliability and stability of the product throughout its entire life cycle. This invention, through performance consistency testing and grading methods, can effectively screen out defective products and accurately grade modules during the production stage, ensuring the yield and quality stability of the final product. In addition, the module itself has a simple structure, mainly fixed by adhesive or simple structural components, which reduces assembly complexity and production costs. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart illustrating the implementation method of an anti-metal NFC antenna module according to the present invention. Figure 2 This is a schematic diagram of the disassembled structure of a metal NFC antenna module according to the present invention; Figure 3 This is a schematic diagram of the finished structure of a metal NFC antenna module according to the present invention; Figure 4 This is a schematic diagram of a Touch metal sensor network structure according to the present invention; Figure 5 This is a schematic diagram of an NFC antenna coil structure according to the present invention; Figure 6 This is a schematic diagram of the structure of a soft magnetic material sheet according to the present invention.

[0019] Figure Labels 1: Touch metal sensor network; 2: NFC antenna coil; 3: Soft magnetic material sheet. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] This invention constructs a multi-layered collaborative structure by spaced NFC antenna coils beneath a Touch metal sensor network and attaching them to a soft magnetic material sheet. This effectively suppresses metal eddy currents, guides magnetic field penetration, and simultaneously ensures NFC communication distance and touch sensing sensitivity. This integrated solution overcomes the challenge of NFC signal shielding in metallic environments, achieving high-performance fusion of touch and wireless communication on metal surfaces. It boasts advantages such as compact structure, high reliability, and suitability for mass production.

[0022] The specific embodiments of the present invention will be described below with reference to the accompanying drawings and examples.

[0023] Example 1 Please see Figure 1 This embodiment provides a technical solution for implementing an anti-metal NFC antenna module. The anti-metal NFC antenna module includes a Touch metal sensor network 1, an NFC antenna coil 2, and a soft magnetic material sheet 3 arranged from top to bottom. The method includes the following steps: S1: The NFC antenna coil 2 is arranged below the Touch metal sensor network 1 at a preset interval. The soft magnetic material sheet 3 is attached to the side of the NFC antenna coil 2 that is away from the Touch metal sensor network. The NFC antenna coil 2 is electrically connected to the external NFC function module through the first conductive connection line, and the Touch metal sensor network 1 is electrically connected to the whole device sensor electronic module through the second conductive connection line. S2: Establish an electromagnetic simulation model including the Touch metal sensor network 1, the NFC antenna coil 2 and the soft magnetic material sheet 3. In the electromagnetic simulation model, the mesh pattern of the Touch metal sensor network 1 and the routing of the NFC antenna coil 2 are optimized in a coordinated manner, and the anti-metal interference capability is enhanced by magnetic field focusing. S3: The anti-metal NFC antenna module is subjected to performance consistency testing and grading during the production process, and the anti-metal NFC antenna module is monitored in real time during use and operation to achieve dynamic calibration of module parameters.

[0024] Specifically, such as Figure 2 As shown, the present invention provides an anti-metal NFC antenna module, comprising: a Touch metal sensor network 1, an NFC antenna coil 2, and a soft magnetic material sheet 3, wherein... The Touch metal sensor network 1 is configured as an external metal component of the anti-metal NFC antenna module and is fixed to the NFC coil 2 using double-sided adhesive or a mechanism. A soft magnetic material 3 is also fixed to the NFC coil 2 using double-sided adhesive or a mechanism, ensuring the positional stability and signal integrity of the NFC antenna coil 2 during use. A preset gap is maintained between the NFC antenna coil 2 and the Touch metal sensor network 1. This gap allows for functional independence and structural separation, effectively improving the penetration of electromagnetic waves generated by the NFC coil 2.

[0025] The whole-machine sensor electronic module is used to receive and process signals from the Touch metal sensor network 1 to realize the recognition and response to metal touch actions; The Touch metal sensor network 1 is configured as an external environmental metal component of the anti-metal NFC antenna module, providing an integrated metal mesh panel for the NFC antenna while detecting trigger events.

[0026] The assembled anti-metal NFC antenna module, such as Figure 3 As shown.

[0027] The NFC antenna coil 2 and the Touch metal sensor network 1 maintain a preset interval, and the method for determining the preset interval includes: The electromagnetic simulation model simulates the magnetic field distribution intensity of the NFC antenna coil 2 and the capacitive sensing sensitivity of the Touch metal sensor network 1 under different interval distances. With the common goals of maximizing NFC card reading distance and optimizing Touch sensor sensitivity, a multi-objective optimization algorithm is used to determine the optimal interval distance value.

[0028] Secondly, in step S2, the mesh pattern of the Touch metal sensor network 1 and the routing of the NFC antenna coil 2 are optimized in a coordinated manner: Obtain the baseline capacitance value of the Touch sensor and the initial inductance value of the NFC antenna under the initial grid pattern; The metal coverage of the grid pattern and the turn spacing of the NFC antenna coil 2 are used as collaborative design variables; The design variables are iteratively adjusted in the electromagnetic simulation software until the following conditions are met simultaneously: the capacitance change of the touch sensor is greater than the action threshold, and the actual resonant frequency of the NFC antenna falls within the permissible range.

[0029] In this embodiment, the structure of the Touch metal sensor network 1 is as follows: Figure 4 As shown, the structure of the NFC antenna coil 2 is as follows: Figure 5 As shown.

[0030] Furthermore, the selection and configuration method of the soft magnetic material sheet 3 includes: According to the target operating frequency of the NFC antenna coil 2 Selecting a frequency with high permeability With low loss tangent Soft magnetic materials; Based on the metal mesh density of the Touch metal sensor network 1 and the preset interval, the minimum theoretical thickness of the required soft magnetic material sheet is calculated using the following formula. To effectively guide the magnetic field: in, The permeability of free space, The electrical conductivity of the metal material in the Touch metal sensor network is given. This is a correction factor related to the mesh aperture ratio.

[0031] Simultaneously, magnetic field focusing is achieved through a soft magnetic material sheet 3 with customized shape and size, enhancing the ability to resist metal interference. The magnetic field focusing includes: The weak areas of the magnetic field generated by the NFC antenna coil under the influence of the metal mesh of the Touch metal sensor network 1 were determined by electromagnetic simulation model. Based on the magnetic field distribution, the shape and area of ​​the soft magnetic material sheet 3 are customized so that its outline extends beyond the outer edge of the NFC antenna coil by a certain width. ,in satisfy: in, The outer perimeter of the NFC antenna coil is given. This is a focusing factor related to the permeability of soft magnetic materials, which is used to converge magnetic field lines and increase the strength of the positive magnetic field.

[0032] In this embodiment, the structure of the soft magnetic material sheet 3 is as follows: Figure 6 As shown.

[0033] The aforementioned optimization of the Touch metal sensor network 1 and the NFC antenna coil 2, as well as the magnetic field focusing, were all achieved during the design phase by constructing an electromagnetic simulation model in step S2, further including: Analyze the impact of other metal components in the electromagnetic simulation model on the performance of the anti-metal NFC antenna module; Based on the simulation results, the internal layout of the whole machine and the installation position of the module were adjusted in a coordinated manner to ensure that the card reading distance of the NFC antenna coil 2 and the sensitivity of the Touch metal sensor network 1 both meet the design requirements in the final product.

[0034] During the design and production process, we conducted performance consistency testing and grading on the anti-metal NFC antenna module, including: The module's card reading success rate was tested using a standard NFC card reader at a fixed distance and orientation, and its maximum effective communication distance was recorded. The response accuracy and linearity of the Touch metal sensor network 1 were tested using an automated touch simulation device. The maximum effective communication distance, response accuracy, and linearity are used as test results and compared with the preset performance benchmark range to classify the modules into different performance levels for use in products of different grades.

[0035] In the simulation tests conducted in this embodiment, the following key parameters were obtained for the designed coil or inductor device: NFC tag type Maximum effective communication distance Tag1 23mm Tag2 20mm Tag3 22mm Tag4A 13mm Tag4B 9mm Tag5 41mm Even in a metallic environment such as Touch Metal Sensor Network 1, the antenna module of this invention can still effectively read different protocol tags, thus quantitatively demonstrating its excellent "anti-metal" performance and communication reliability. When applied to portable devices, the coil can efficiently transfer energy without occupying excessive space, making it suitable for portable electronic devices requiring space-saving and high-efficiency transmission.

[0036] In actual use and operation, we can continuously perform parameter calibration, as described in step S3, specifically including: During device operation, the bit error rate (BER) of NFC communication and the signal-to-noise ratio (SNR) of the touch sensor are periodically collected. If the BER exceeds the first threshold or the SNR is lower than the second threshold, the module performance is determined to be degraded, and the calibration process is initiated. The variable capacitor in the matching circuit connected to the NFC antenna coil is fine-tuned according to the following relationship. To compensate for frequency drift: in, For negative feedback coefficients, The target bit error rate.

[0037] Through the methods described above, the low heat loss and high-efficiency transmission characteristics give our coils a significant advantage in the field of wireless charging. This not only improves charging efficiency but also helps ensure the safe and stable operation of the device.

[0038] Based on this, this embodiment provides a system for implementing an anti-metal NFC antenna module. The anti-metal NFC antenna module includes a Touch metal sensor network, an NFC antenna coil, and a soft magnetic material sheet arranged from top to bottom. The system includes: The hardware design module is used to arrange the NFC antenna coil at a preset interval below the Touch metal sensor network, attach the soft magnetic material sheet to the side of the NFC antenna coil opposite to the Touch metal sensor network, electrically connect the NFC antenna coil to an external NFC function module through a first conductive connection line, and electrically connect the Touch metal sensor network to the whole device sensor electronic module through a second conductive connection line. The simulation design optimization module is used to establish an electromagnetic simulation model including the Touch metal sensor network, the NFC antenna coil, and the soft magnetic material sheet. Within the electromagnetic simulation model, the grid pattern of the Touch metal sensor network and the routing of the NFC antenna coil are optimized in a coordinated manner, and the anti-metal interference capability is enhanced by magnetic field focusing. The production operation optimization module is used to perform performance consistency testing and grading on the anti-metal NFC antenna module during the production process, and to perform real-time performance monitoring on the anti-metal NFC antenna module during use and operation, so as to realize dynamic calibration of module parameters.

[0039] It should be noted that the steps in the implementation method of the anti-metal NFC antenna module provided in this embodiment can be implemented based on the corresponding modules in the implementation system of the anti-metal NFC antenna module. Those skilled in the art can refer to the technical solution of the system to implement the steps of the method. That is, the embodiment in the system can be understood as a preferred example of implementing the method, and will not be elaborated here.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, such as replacing the current Touch metal sensor network 1 with a metal mesh structure such as an LED screen, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the scope of protection of the present invention. For those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A method for implementing an anti-metal NFC antenna module, characterized in that, The anti-metal NFC antenna module includes a Touch metal sensor network, an NFC antenna coil, and a soft magnetic material sheet arranged from top to bottom. The method includes the following steps: S1: The NFC antenna coil is arranged at a preset interval below the Touch metal sensor network. The soft magnetic material sheet is attached to the side of the NFC antenna coil opposite to the Touch metal sensor network. The NFC antenna coil is electrically connected to an external NFC function module through a first conductive connection line, and the Touch metal sensor network is electrically connected to the whole device sensor electronic module through a second conductive connection line. S2: Establish an electromagnetic simulation model including the Touch metal sensor network, the NFC antenna coil, and the soft magnetic material sheet. Within the electromagnetic simulation model, optimize the mesh pattern of the Touch metal sensor network and the routing of the NFC antenna coil in a coordinated manner, and enhance the anti-metal interference capability by focusing the magnetic field. S3: The anti-metal NFC antenna module is subjected to performance consistency testing and grading during the production process, and the anti-metal NFC antenna module is monitored in real time during use and operation to achieve dynamic calibration of module parameters.

2. The method for implementing the anti-metal NFC antenna module according to claim 1, characterized in that, In step S1, the method for determining the preset interval includes: The electromagnetic simulation model simulates the magnetic field distribution intensity of the NFC antenna coil and the capacitive sensing sensitivity of the Touch metal sensor network under different interval distances. With the common goals of maximizing NFC card reading distance and optimizing Touch sensor sensitivity, a multi-objective optimization algorithm is used to determine the optimal interval distance value.

3. The method for implementing the anti-metal NFC antenna module according to claim 1, characterized in that, The selection and configuration method of the soft magnetic material sheet includes: According to the target operating frequency of the NFC antenna coil Selecting a frequency with high permeability With low loss tangent Soft magnetic materials; Based on the metal mesh density of the Touch metal sensor network and the preset interval, the minimum theoretical thickness of the required soft magnetic material sheet is calculated using the following formula. To effectively guide the magnetic field: in, The permeability of free space, The electrical conductivity of the metal material in the Touch metal sensor network is given. This is a correction factor related to the mesh aperture ratio.

4. The method for implementing the anti-metal NFC antenna module according to claim 1, characterized in that, In step S2, the mesh pattern of the Touch metal sensor network and the routing of the NFC antenna coil are optimized in a coordinated manner: Obtain the baseline capacitance value of the Touch sensor and the initial inductance value of the NFC antenna under the initial grid pattern; The metal coverage of the grid pattern and the turn spacing of the NFC antenna coil are used as collaborative design variables; The design variables are iteratively adjusted in the electromagnetic simulation software until the following conditions are met simultaneously: the capacitance change of the touch sensor is greater than the action threshold, and the actual resonant frequency of the NFC antenna falls within the permissible range.

5. The method for implementing the anti-metal NFC antenna module according to claim 3, characterized in that, In step S2, the magnetic field focusing includes: The weak areas of the magnetic field generated by the NFC antenna coil under the influence of the metal mesh of the Touch metal sensor network were determined by electromagnetic simulation model. Based on the magnetic field distribution, the shape and area of ​​the soft magnetic material sheet are customized so that its outline extends beyond the outer edge of the NFC antenna coil by a certain width. ,in satisfy: in, The outer perimeter of the NFC antenna coil is given. This is a focusing factor related to the permeability of soft magnetic materials, which is used to converge magnetic field lines and increase the strength of the positive magnetic field.

6. The method for implementing the anti-metal NFC antenna module according to claim 1, characterized in that, In step S3, the dynamic calibration of the module parameters includes: During device operation, the bit error rate (BER) of NFC communication and the signal-to-noise ratio (SNR) of the touch sensor are periodically collected. If the BER exceeds the first threshold or the SNR is lower than the second threshold, the module performance is determined to be degraded, and the calibration process is initiated. The variable capacitor in the matching circuit connected to the NFC antenna coil is fine-tuned according to the following relationship. To compensate for frequency drift: in, For negative feedback coefficients, The target bit error rate.

7. The method for implementing the anti-metal NFC antenna module according to claim 1, characterized in that, In step S3, the performance consistency test and grading includes: The module's card reading success rate was tested using a standard NFC card reader at a fixed distance and orientation, and its maximum effective communication distance was recorded. The response accuracy and linearity of the Touch metal sensor network were tested using an automated touch simulation device. The maximum effective communication distance, response accuracy, and linearity are used as test results and compared with the preset performance benchmark range to classify the modules into different performance levels for use in products of different grades.

8. The method for implementing the anti-metal NFC antenna module according to claim 1, characterized in that, In step S2, the establishment of the electromagnetic simulation model further includes: Analyze the impact of other metal components in the electromagnetic simulation model on the performance of the anti-metal NFC antenna module; Based on the simulation results, the internal layout of the whole machine and the installation position of the module were adjusted in a coordinated manner to ensure that the card reading distance of the NFC antenna coil and the sensitivity of the Touch metal sensor network in the final product both meet the design requirements.

9. The method for implementing the anti-metal NFC antenna module according to claim 1, characterized in that, In step S1, the whole-machine sensor electronic module is used to receive and process signals from the Touch metal sensor network to realize the recognition and response to metal touch actions; The Touch metal sensor network is configured as an external environmental metal component of the anti-metal NFC antenna module, providing an integrated metal mesh panel for the NFC antenna while detecting trigger events.

10. A system for implementing an anti-metal NFC antenna module, characterized in that, The anti-metal NFC antenna module includes a Touch metal sensor network, an NFC antenna coil, and a soft magnetic material sheet arranged from top to bottom. The system includes: The hardware design module is used to arrange the NFC antenna coil at a preset interval below the Touch metal sensor network, attach the soft magnetic material sheet to the side of the NFC antenna coil opposite to the Touch metal sensor network, electrically connect the NFC antenna coil to an external NFC function module through a first conductive connection line, and electrically connect the Touch metal sensor network to the whole device sensor electronic module through a second conductive connection line. The simulation design optimization module is used to establish an electromagnetic simulation model including the Touch metal sensor network, the NFC antenna coil, and the soft magnetic material sheet. Within the electromagnetic simulation model, the grid pattern of the Touch metal sensor network and the routing of the NFC antenna coil are optimized in a coordinated manner, and the anti-metal interference capability is enhanced by magnetic field focusing. The production operation optimization module is used to perform performance consistency testing and grading on the anti-metal NFC antenna module during the production process, and to perform real-time performance monitoring on the anti-metal NFC antenna module during use and operation, so as to realize dynamic calibration of module parameters.

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