Touch screen circuit board

Abstract

The invention relates to the technical field of industrial control equipment, and discloses a touch screen circuit board, which comprises an embedded main control chip used for touch signal processing and interface protocol scheduling; the touch screen display interface is connected with the touch screen and transmits a display signal; the industrial control communication interface module integrates at least two communication interfaces including any combination of a USB, a UART, an SPI and a CAN; the dynamic signal channel network constructs a signal path topological structure in real time based on the interface use state sensed by the embedded main control chip and dynamically adjusts path configuration; and the anti-interference optimization module is used for inhibiting path interference in the dynamic signal channel network through a disturbance prediction model and potential field coupling analysis. According to the method, the touch signal processing and transmission efficiency is improved, multiple communication protocols are supported, the signal path is dynamically constructed based on the interface state, the anti-interference performance is remarkably enhanced, and the method adapts to the complex and changeable industrial application environment.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial control equipment, and in particular to a touch screen circuit board. Background Art

[0002] In industrial automation, small-screen embedded touch terminals, as key components for human-machine interaction, are widely used in core processes such as equipment status monitoring, parameter setting, and process control. With increasing production line control precision requirements and limited on-site space, the hardware architecture of these terminals is evolving towards smaller size, lower power consumption, and higher integration.

[0003] Currently, embedded main control chips are gradually replacing traditional industrial host solutions. This is especially true in control platforms built with ARM cores or domestic SoCs (such as the CCM4201S), which can now implement basic display driver, touch acquisition, and communication interface adaptation functions. Thanks to the maturity of display driver technology and the optimization of touch algorithms, these systems have achieved high cost-effectiveness in lightweight industrial scenarios, and are particularly widely deployed in small-screen control systems such as intelligent manufacturing, portable control terminals, and on-board diagnostic equipment.

[0004] However, with the increasing density of communication links and the increasing complexity of electromagnetic environments, existing embedded solutions still face many limitations when it comes to multi-protocol collaboration, dynamic signal channel switching, and anti-interference requirements. Especially in industrial scenarios, there is often resource competition between touch signal sampling and communication interface access. Traditional chips mostly use interrupt response as the main scheduling method, which makes it difficult to ensure stability when multiple tasks are executed concurrently. In addition, although some SoCs already have hardware communication controllers, their protocol scheduling logic is mostly statically configured and lacks real-time perception of interface load, path fitness, and signal interference intensity, making it difficult to flexibly switch paths or adjust communication strategies based on actual operating conditions.

[0005] In terms of power management, existing technologies generally rely on periodic detection mechanisms at the software level to determine whether to enter low-power mode. However, such mechanisms are slow to respond, often maintaining high energy consumption even in low-communication load scenarios, making it difficult to meet the endurance requirements of portable or energy-constrained devices. More critically, in industrial electromagnetic environments where interference intensity fluctuates dramatically, traditional anti-interference solutions often rely on peripheral filtering or physical isolation, lacking dynamic optimization strategies based on the signal path structure itself, making it difficult to effectively prevent data corruption caused by signal distortion or path misdirection.

[0006] Therefore, the present invention proposes a touch screen circuit board to solve the deficiencies of the prior art. Summary of the Invention

[0007] In response to the deficiencies of the existing technology, the present invention provides a touch screen circuit board that solves the problems of low integration, weak anti-interference capability, and insufficient multi-protocol communication adaptability in existing embedded systems in small-size industrial control scenarios.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A touch screen circuit board, comprising: Embedded main control chip for touch signal processing and interface protocol scheduling; Touch screen display interface, connected to the touch screen and transmits display signals; Industrial control communication interface module, integrating at least two communication interfaces, including any combination of USB, UART, SPI, and CAN; A dynamic signal channel network builds a signal path topology in real time based on the interface usage status sensed by the embedded main control chip and dynamically adjusts the path configuration; The anti-interference optimization module suppresses path interference in the dynamic signal channel network through a disturbance prediction model and electric potential field coupling analysis.

[0009] Preferably, the embedded main control chip includes: A touch signal processing unit for analyzing capacitive or resistive touch input signals; A protocol scheduling unit, dynamically allocating the protocol type of the industrial control communication interface module; Hardware acceleration module, integrating hardware acceleration logic of display driver and communication protocol; The low-power control unit switches the chip operating mode according to the interface usage status.

[0010] Preferably, the touch screen display interface includes: Touch signal acquisition module, supporting capacitive or resistive touch technology; Display driver module, adapted to the timing control of LCD or OLED screens; Touch-display synchronization controller eliminates timing conflicts between touch sampling and display refresh; Anti-interference isolation circuit, integrated common-mode inductor and TVS diode.

[0011] Preferably, the dynamic signal channel network is constructed by a dynamic graph model, wherein the edge weight of each signal path is calculated by the following formula: w ij (t) = αR ij +βC ij +γσ ij (t); Among them, R ij is the path equivalent resistance, C ij is the coupling capacitance, σ ij(t) is the real-time crosstalk intensity, and α, β, and γ are normalized weight coefficients.

[0012] Preferably, the disturbance prediction model of the anti-interference optimization module describes the disturbance field distribution of the circuit board through a partial differential equation, and the disturbance field distribution equation is: Where S(x,y,t) is the disturbance intensity field, Q(x,y,t) is the interface driving signal source function, D is the diffusion coefficient, and γ is the absorption coefficient. is the second-order spatial derivative, which describes the diffusion behavior of the disturbance field in space.

[0013] Preferably, the interference threshold set in the disturbance field model satisfies: Among them, δ is the preset maximum allowable interference integral value, For the signal path.

[0014] Preferably, the anti-interference optimization module controls path interference by coupling analysis of an electric potential field, and the electric potential field satisfies the Poisson equation: Where φ(x,y) is the electric potential distribution, ρ(x,y) is the signal line charge density, and ∈ is the dielectric constant of the circuit board.

[0015] Preferably, the dynamic signal channel network divides the wiring area of the circuit board into multiple geometric sub-blocks, and the wiring priority of each sub-block is determined by the following formula: M(Ω i )=λ1L free (Ω i )-λ2Σ noise (Ω i ); Among them, M(Ω i ) is the routing priority of the i-th sub-block, L free (Ω i ) is the sub-block Ω i Available wiring length within Σnoise(Ω i ) is the sub-block Ω i The interference accumulation value within is λ1 and λ2 are weight coefficients.

[0016] Preferably, the path reconstruction triggering condition of the dynamic signal channel network is: Among them, U k (t) indicates whether to trigger path reconstruction, A k (t) is the current path fitness function, μ k(t) is the interface usage status, A threshold is the preset path fitness threshold.

[0017] The present invention provides a touch screen circuit board having the following beneficial effects: 1. This invention utilizes an integrated embedded main control chip and multifunctional module, achieving efficient adaptation to small screens and embedded systems at a low cost. Compared to the single-function chips commonly used in existing technologies, this solves the problems of complex system configuration and high hardware costs caused by incomplete functions or low integration.

[0018] 2. This invention achieves flexible multi-protocol switching in industrial control environments by deeply integrating a protocol scheduling mechanism with a dynamic signal channel network. Compared to traditional solutions, it can ensure stable data transmission under complex electromagnetic interference, avoiding common communication interruptions and data loss.

[0019] 3. The integrated low-power control unit in this invention intelligently switches operating modes based on interface usage, significantly improving the system's power efficiency. Compared to the high power consumption often seen in traditional designs, this solution effectively reduces power consumption during both standby and runtime, extending the device's operating time.

[0020] 4. This invention utilizes a collaborative design of a hardware acceleration module and a touch signal processing unit, achieving efficient response and real-time signal processing. Compared to existing technologies, it solves the problems of signal delay and insufficient processing power without increasing system complexity, making it particularly suitable for small-screen industrial control interface applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a touch screen circuit board of the present invention; Figure 2 This is a schematic diagram of the structure of the embedded main control chip of the present invention; Figure 3 It is a schematic diagram of the touch screen display interface structure of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Please see the attached Figure 1 -Attached Figure 3 , an embodiment of the present invention provides a touch screen circuit board, comprising: Embedded main control chip for touch signal processing and interface protocol scheduling; The embedded master control chip not only needs to be multi-protocol compatible and capable of scheduling, but also needs to work with a dynamic signal path network to enable real-time signal path construction and adjustment. Furthermore, to reduce power consumption and improve signal processing efficiency, the master control chip integrates multiple functional modules and establishes a data feedback and triggering mechanism with the anti-interference optimization module to achieve dynamic response to interference environments. The following describes the structure and functional implementation of this embedded master control chip, combining practical design solutions and technical details.

[0024] In this embodiment, the embedded main control chip integrates a touch signal processing unit, a protocol scheduling unit, a hardware acceleration module and a low-power control unit, which are used to implement touch signal analysis, dynamic scheduling of communication interface protocols, optimization of data processing performance and control of power consumption levels.

[0025] Specifically, the touch signal processing unit is adapted to analyze raw touch data from capacitive or resistive touch screens. Generally, to improve sampling accuracy and reduce drift errors, the processing unit integrates a multi-order filtering structure and uses a dynamic threshold adjustment algorithm to adapt to capacitance / resistance fluctuations under different screen materials. In practical applications, such as capacitive touch conditions, the processing unit calculates the touch point position based on the changing charge distribution in the screen sampled data, thereby generating a two-dimensional touch coordinate signal.

[0026] As an option, the touch processing unit can support 10-bit to 12-bit ADC resolution and a sampling frequency ranging from 200Hz to 1kHz, depending on the peripheral driving capability and anti-interference level requirements.

[0027] In this embodiment, the protocol scheduling unit is used to dynamically allocate communication interface resources. When multiple industrial communication interface modules, such as USB, UART, CAN, and SPI, are present, protocol switching is performed based on the real-time interface load, data priority strategy, and current path fitness. In a specific implementation, the protocol scheduling mechanism selects and switches protocols based on the real-time status of the communication path, ensuring stable data transmission even in the presence of significant interference.

[0028] In some embodiments, the protocol scheduling unit is equipped with a scheduling buffer register and a status monitor, which can perform handshake control on the signal switching process to avoid data packet loss or repeated transmission due to interrupt switching.

[0029] Furthermore, to improve data processing efficiency, the hardware acceleration module described in this embodiment integrates acceleration paths for display control and communication logic. Generally, this module employs a multi-state machine architecture, corresponding to driver control for protocols such as SPI, I2C, and CAN. By hardening the low-level protocols, the number of interrupts to the main control chip can be significantly reduced, lowering the load on the main CPU.

[0030] For example, when driving an LCD display, the hardware acceleration module refreshes the frame buffer at an independent clock frequency through the built-in display refresh controller to prevent the main control logic from entering a blocked state.

[0031] As an option, the module can support SPI high-speed communication with a driving frequency of more than 20MHz and a FIFO cascade structure to ensure stable transmission of high-speed data streams.

[0032] In one possible implementation, the hardware acceleration module coordinates timing with the touch sampling controller, eliminating timing conflicts between touch signal sampling and display signal updates through alternating operation, and effectively avoiding UI response delays.

[0033] Finally, the low power control unit in this embodiment is used to automatically switch the chip's operating mode according to the usage status of the communication interface. Specifically, when the usage status of all interfaces satisfies the following formula: When all interfaces are idle, the low-power control unit will trigger the chip to enter a low-power standby state, retaining only the protocol scheduling judgment module and the wake-up interrupt logic.

[0034] In some embodiments, the low power consumption unit uses a state holding register to record the protocol stack state before standby, so that it can be quickly restored when it wakes up next time without reinitializing the configuration of each module.

[0035] Furthermore, the low-power control unit can also work with the anti-interference optimization module to suspend non-critical communications when the interference intensity exceeds the set value, thereby improving overall power utilization efficiency and system stability.

[0036] In summary, through the integration of multiple functional modules inside the embedded main control chip, accurate analysis of touch signals is achieved, flexible adaptation capabilities for multi-protocol communications are built, and an efficient response mechanism is provided in terms of power consumption and interference control.

[0037] Touch screen display interface, connected to the touch screen and transmits display signals; To achieve efficient signal transmission between the embedded main control chip and the external touch display component, and to coordinate with the touch signal processing unit to complete input recognition and image output control, a dedicated touch screen display interface was incorporated into the system design. This interface not only bridges the gap between touch signal acquisition and display signal output, but also performs several key functions, including anti-interference processing, timing synchronization, and signal isolation. This provides stable signal-level support for the main control chip's touch response logic. Especially in industrial environments with high interference and complex power supply structures, the design of this display interface is a key factor in ensuring reliable operation of the entire board.

[0038] In this embodiment, the touch screen display interface includes a touch signal acquisition module, a display driver module, a touch-display synchronization controller and an anti-interference isolation circuit. Its functional logic cooperates with each other in the structural design and establishes a logical binding relationship with the touch signal processing unit in the main control chip.

[0039] Specifically, the touch signal acquisition module is used to collect user input signals from capacitive or resistive touch screen panels. Typically, this module employs a multi-channel analog sampling architecture with pull-up / pull-down control capabilities to accommodate various resistor networks. With capacitive technology, the user's touch location is determined by scanning the capacitance change point by point.

[0040] As an option, the acquisition module integrates a 10-bit resolution ADC array, supports simultaneous dual-channel sampling, and features oversampling to suppress interference noise. In some implementations, digital filtering and artifact cancellation mechanisms are also introduced to reduce edge drift.

[0041] In one possible implementation, the touch signal acquisition module is connected to the main control chip via SPI or I2C, and the sampling period ranges from 1ms to 5ms, depending on the response delay requirements in the application scenario.

[0042] In this embodiment, the display driver module is used to adapt and drive different types of display panels, supporting frame control logic for both LCD and OLED display devices. Generally, the display driver module includes a clock generator, a frame buffer register, and a grayscale control unit, and outputs data frame signals based on a customized timing table.

[0043] Specifically, when driving an LCD screen, the module needs to generate a horizontal synchronization signal (HSYNC), a vertical synchronization signal (VSYNC), a pixel clock (PCLK), and an RGB data stream. The corresponding relationships are as follows: Among them, f PCLK is the pixel clock frequency (unit: Hz); H total is the total number of clocks per row (including display pixels and blank areas); Vtotal is the total number of lines per frame; f frame is the frame refresh rate (unit: Hz), usually 60Hz.

[0044] As an option, if it is an OLED panel, the display driver module is adjusted to a row-by-row writing method based on a serial data structure to support PWM dimming control.

[0045] The touch-display synchronization controller is used to coordinate the interference conflicts between the touch sampling cycle and the display refresh cycle. Generally, because the touch and display share some power rails and clock resources, if the two are not properly synchronized, screen jitter or touch delay problems will occur.

[0046] In one possible implementation, the touch-display synchronization controller uses a dual-clock domain alternation mechanism, which pauses touch sampling during display refresh and freezes display output during touch sampling, minimizing interference by periodically staggering the clock.

[0047] In some embodiments, the controller determines a "display forbidden zone" through an external trigger flag, that is, inserts a touch scanning operation into the synchronization signal gap between display rows, thereby achieving synchronous sampling.

[0048] In this embodiment, the anti-interference isolation circuit is integrated between the touch signal and display signal output paths. Its main function is to suppress error signals introduced by common-mode interference, power supply pulses, and ground voltage drift.

[0049] Typically, the circuit includes a common-mode inductor (CMI) on the input side and a transient suppression diode (TVS) on the output side. Its principle is to filter out noise components through a magnetic flux cancellation mechanism when high-frequency interference occurs, while also quickly clamping the voltage waveform under the action of transient spike voltages.

[0050] In the specific structure, the common-mode inductor is designed as a symmetrical coil structure wound on a dual-core ferrite core, with an inductance range of 30μH to 100μH; the TVS selection is based on the interface operating voltage setting, and the commonly used value is a 5V / 10V bidirectional device.

[0051] As an option, an RC absorption network and power decoupling capacitors can be added to the anti-interference isolation circuit to attenuate interference energy within a wider frequency bandwidth and improve the overall stability of the system.

[0052] In some embodiments, the isolation circuit is linked with the low-power control unit of the main control chip to cut off the power supply path of the touch display interface in standby mode, thereby reducing static power consumption and enhancing anti-static capability.

[0053] In summary, the touch screen display interface in the present invention not only plays a basic bridging role between signal acquisition and output, but also improves the stability of touch response and the anti-interference ability of display output through a modular structure.

[0054] Industrial control communication interface module, integrating at least two communication interfaces, including any combination of USB, UART, SPI, and CAN; As a peripheral expansion of the embedded main control chip, the industrial control communication interface module not only handles the core communication tasks of uploading data and issuing control signals, but also collaborates with the protocol scheduling unit to achieve parallel scheduling and dynamic switching of multiple interfaces. In environments with complex electromagnetic interference, high-load transmission, or mixed use of multiple protocols, the communication interface module ensures the continuity and stability of the communication link through path weight calculation and fitness determination mechanisms.

[0055] In this embodiment, the industrial control communication interface module integrates at least two communication interfaces, any combination of which can be selected from USB (Universal Serial Bus), UART (Universal Asynchronous Receiver / Transmitter), SPI (Serial Peripheral Interface), and CAN (Controller Area Network). This module is logically bound to the main control chip through universal pin multiplexing technology, supporting dynamic switching between multiple protocols.

[0056] Typically, a protocol abstraction layer is built into the communication interface module, and different interface logic is accessed and dispatched through a unified register structure. For example, in actual deployment, you might configure UART for debug communication, CAN for controller communication, SPI for peripheral expansion, and USB for data upload.

[0057] Specifically, the allocation and switching of communication interfaces depends on the path fitness function defined in the protocol scheduling unit. When the quality of a communication link degrades and the link is in an active state, the system automatically switches the interface according to the configured trigger logic.

[0058] In one possible implementation, each interface corresponds to an independent interrupt service vector and DMA channel, which eliminates the need for the CPU to actively participate in context transfer when switching interfaces, thereby improving response speed.

[0059] In some embodiments, the CAN interface adopts the ISO#11898 protocol standard, the baud rate range is set between 125kbps and 1Mbps, and is combined with a hardware filter to shield irrelevant messages; the SPI interface supports master-slave mode switching, the maximum operating frequency is 20MHz, and a chip select line level flip recognition mechanism is introduced to support multiple peripheral access.

[0060] As an option, the USB interface is designed based on USB 2.0 full-speed mode, supporting two basic channels: bulk transfer and control transfer. During configuration, a dedicated clock source can be generated by the internal PLL of the main control chip to ensure stable USB timing. The UART interface supports a default rate configuration range of 9600bps to 115200bps, is compatible with the 9-bit data frame structure, and is suitable for half-duplex host-control dialogue devices.

[0061] In some embodiments, during the collaboration between the communication interface module and the dynamic signal channel network, the link selection is optimized through the fitness calculation function in the protocol scheduling unit to ensure the system stability when multiple protocols work simultaneously.

[0062] Furthermore, the communication interface module maintains a logical linkage with the anti-interference optimization module. This module determines the anti-interference capability of the current interface through real-time monitoring of the signal path and prioritizes interfaces with stronger anti-interference capabilities (such as CAN or SPI) to ensure communication reliability in complex environments.

[0063] To sum up, the industrial control communication interface module in the present invention not only undertakes the basic function of peripheral connection, but also constructs a dynamically reconfigurable and stably adaptable industrial-grade communication interface architecture through multiple collaborations with the protocol scheduling unit, dynamic signal channel network and anti-interference model.

[0064] A dynamic signal channel network builds a signal path topology in real time based on the interface usage status sensed by the embedded main control chip and dynamically adjusts the path configuration; The dynamic signal path network's role in the system is to intelligently construct signal path topology based on the real-time perception of interface usage by the embedded master control chip, and dynamically adjust path configuration based on this structure. This network efficiently manages signal transmission paths, enabling flexible resource scheduling and path selection across different communication interfaces. Through rational path selection and dynamic adjustment, this invention effectively improves system transmission efficiency, reduces signal interference, and optimizes overall system performance, ensuring stable and reliable signal transmission, particularly in complex environments.

[0065] In this embodiment, the dynamic signal channel network is constructed by a dynamic graph model, where the edge weight of each signal path is calculated by the following formula: w ij(t) = αR ij +βC ij +γσ ij (t); Among them, w ij (t) represents the path edge weight from node i to node j; R ij is the path equivalent resistance (unit: ohm); C ij is the coupling capacitance of the path (unit: pF); σ ij (t) is the crosstalk intensity of path i→j at time t (unit: volt); α, β, and γ are normalized weight coefficients, which are used to adjust the influence of different factors on the path weight.

[0066] Specifically, in practical applications, the equivalent resistance R ij It is closely related to the path layout and the electrical properties of the materials used, while the coupling capacitance C ij Mainly affected by the surrounding signal lines. Crosstalk intensity σ ij (t) reflects the intensity of mutual interference between signals, which usually fluctuates with system load or environmental changes.

[0067] Typically, a dynamic signal path network monitors the usage status of each communication interface in real time. When an interface is activated and under high load, the network prioritizes signal paths with strong anti-interference capabilities and high path quality for data transmission, avoiding signal conflicts and transmission delays.

[0068] In addition, in order to optimize the path configuration, this embodiment introduces the division and priority setting of the routing area. Specifically, the dynamic signal channel network divides the circuit board routing area into multiple geometric sub-blocks, and the routing priority of each sub-block is determined by the following formula: M(Ω i )=λ1L free (Ω i )-λ2Σ noise (Ω i ); Among them, M(Ω i ) is the routing priority of the i-th sub-block; L free (Ω i ) is the sub-block Ω i Available wiring length within Σnoise(Ω i ) is the sub-block Ω i The accumulated interference value within λ1 is λ2; λ1 and λ2 are weight coefficients used to balance the relationship between wiring length and interference factors.

[0069] As an option, the routing priority M(Ω i) optimization not only considers the available space in each area but also fully accounts for the impact of electromagnetic interference on path selection. In some embodiments, increasing the value of λ1 can make the system more inclined to select areas with greater available routing lengths; while in areas with greater interference, increasing λ2 can reduce the routing priority of these areas.

[0070] Furthermore, the dynamic signal channel network has the ability to reconfigure paths. When the fitness of a communication path decreases and reaches a preset threshold, the network automatically triggers path reconstruction. Specifically, the triggering conditions for path reconstruction are: Among them, U k (t) is the protocol path reconstruction trigger signal, which takes a value of 0 or 1, indicating whether the path needs to be switched; A k (t) is the fitness function of the current path, which represents the real-time stability or quality score of the communication link; μ k (t) is the interface usage status flag, which takes a value of 0 (idle) or 1 (activated); A threshold is the preset path quality threshold.

[0071] In practical applications, when the fitness of an interface is lower than the threshold A threshold When the interface is in the active state, the path reconstruction trigger will reschedule the signal to a line with higher path fitness, thereby ensuring the continuity and stability of data transmission.

[0072] In some embodiments, the path reconstruction strategy for a dynamic signal channel network is based not only on a fitness function but also on a comprehensive assessment and adjustment based on the system's current load and environmental interference factors. This strategy enables the system to adapt to external environmental changes in real time and avoid communication interruptions caused by path quality degradation.

[0073] In summary, the dynamic signal channel network in the present invention optimizes the path quality and stability during signal transmission through intelligent path selection and dynamic configuration adjustment, and improves the system's anti-interference ability and transmission efficiency in complex environments.

[0074] an anti-interference optimization module, which suppresses path interference in the dynamic signal channel network through a disturbance prediction model and electric potential field coupling analysis; The Anti-Interference Optimization module is primarily used to effectively suppress path interference in dynamic signal channel networks. To achieve this, the module combines a disturbance prediction model with electric potential field coupling analysis to monitor and adjust the interference intensity of signal paths in real time, thereby improving the system's anti-interference performance. This module not only considers the electromagnetic environment of the circuit board but also describes the dynamic changes in inter-path interference through precise mathematical models, making signal transmission more stable and reliable.

[0075] In this embodiment, the anti-interference optimization module uses partial differential equations to model the disturbance field of the circuit board. The change of the disturbance field is described by the following equation: Where S(x, y, t) is the disturbance intensity field, which indicates the intensity of the signal interference; Q(x, y, t) is the interface-driven signal source function, which describes the time-varying disturbance of the signal source; D is the diffusion coefficient, which reflects the rate at which the disturbance diffuses; γ is the absorption coefficient, which indicates the absorption rate of the interference energy. is the second-order spatial derivative, which describes the diffusion behavior of the disturbance field in space.

[0076] Through this model, the disturbance intensity at different locations and times on the circuit board can be predicted, thus providing a scientific basis for path interference suppression in practical applications.

[0077] Generally speaking, the disturbance prediction model can provide early warning of interference based on real-time signal status and environmental changes, and limit interference based on the set interference threshold. Specifically, the set interference threshold constrains the change of the disturbance field through the following integral relationship: Among them, δ is the preset maximum allowable interference integral value, For the signal path.

[0078] This setting can ensure that the interference level is always controlled within a reasonable range, avoiding excessive interference from having a negative impact on system stability.

[0079] Alternatively, the disturbance prediction model not only considers the distribution of the interference field but also incorporates a dynamic update mechanism. When the disturbance intensity exceeds a set threshold, the system automatically adjusts the path to prevent signal transmission along the path with the strongest interference, thereby reducing the impact of the interference on the system.

[0080] In addition, the anti-interference optimization module further suppresses path interference through electric potential field coupling analysis. The electric potential field plays a crucial role in the signal transmission process, and its distribution determines the degree of interference in the signal path. The electric potential field satisfies the following Poisson equation: Among them, φ(x,y) is the electric potential distribution, which represents the electric potential at different locations on the circuit board; ρ(x,y) is the signal line charge density, which reflects the charge distribution on the signal line; ∈ is the dielectric constant of the circuit board, which determines the propagation characteristics of the electric field.

[0081] By analyzing the coupled electric potential field, the distribution of interference along the path can be accurately calculated and optimized accordingly. Specifically, the module dynamically selects paths with less interference based on the electric potential distribution, avoiding signal degradation caused by excessive charge density.

[0082] In one possible implementation, the anti-interference optimization module implements a multi-level interference suppression strategy by jointly analyzing the electric potential field and disturbance prediction models. This strategy not only considers the interference intensity of each signal path but also dynamically adjusts path selection and configuration in real time, effectively improving the system's transmission stability in complex electromagnetic environments.

[0083] In summary, the anti-interference optimization module effectively suppresses path interference in the dynamic signal channel network through precise disturbance prediction and electric potential field coupling analysis, thereby improving the signal transmission quality and anti-interference capability of the system.

[0084] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A touch screen circuit board, characterized in that: include: Embedded main control chip for touch signal processing and interface protocol scheduling; Touch screen display interface, connected to the touch screen and transmits display signals; Industrial control communication interface module, integrating at least two communication interfaces, including any combination of USB, UART, SPI, and CAN; A dynamic signal channel network builds a signal path topology in real time based on the interface usage status sensed by the embedded main control chip and dynamically adjusts the path configuration; The anti-interference optimization module suppresses path interference in the dynamic signal channel network through a disturbance prediction model and electric potential field coupling analysis.

2. A touch screen circuit board according to claim 1, characterized in that: The embedded main control chip includes: A touch signal processing unit for analyzing capacitive or resistive touch input signals; A protocol scheduling unit, dynamically allocating the protocol type of the industrial control communication interface module; Hardware acceleration module, integrating hardware acceleration logic of display driver and communication protocol; The low-power control unit switches the chip operating mode according to the interface usage status.

3. The touch screen circuit board according to claim 1, characterized in that: The touch screen display interface includes: Touch signal acquisition module, supporting capacitive or resistive touch technology; Display driver module, adapted to the timing control of LCD or OLED screens; Touch-display synchronization controller eliminates timing conflicts between touch sampling and display refresh; Anti-interference isolation circuit, integrated common-mode inductor and TVS diode.

4. The touch screen circuit board according to claim 1, characterized in that: The dynamic signal channel network is constructed by a dynamic graph model, where the edge weight of each signal path is calculated by the following formula: w ij (t)=αR ij +βC ij +gs ij (t); Among them, R ij is the path equivalent resistance, C ij is the coupling capacitance, σ ij (t) is the real-time crosstalk intensity, and α, β, and γ are normalized weight coefficients.

5. The touch screen circuit board according to claim 1, characterized in that: The disturbance prediction model of the anti-interference optimization module describes the disturbance field distribution of the circuit board through a partial differential equation. The disturbance field distribution equation is: Where S(x,y,t) is the disturbance intensity field, Q(x,y,t) is the interface driving signal source function, D is the diffusion coefficient, and γ is the absorption coefficient. is the second-order spatial derivative, which describes the diffusion behavior of the disturbance field in space.

6. A touch screen circuit board according to claim 5, characterized in that: The interference threshold set in the disturbance field model satisfies: Among them, δ is the preset maximum allowable interference integral value, For the signal path.

7. The touch screen circuit board according to claim 1, characterized in that: The anti-interference optimization module controls the path interference by analyzing the electric potential field coupling, and the electric potential field satisfies the Poisson equation: Where φ(x,y) is the electric potential distribution, ρ(x,y) is the signal line charge density, and ∈ is the dielectric constant of the circuit board.

8. The touch screen circuit board according to claim 1, characterized in that: The dynamic signal channel network divides the circuit board routing area into multiple geometric sub-blocks, and the routing priority of each sub-block is determined by the following formula: M(Ω i )=λ1L free (Oh i )-λ2Σ noise (Oh i ); Among them, M(Ω i ) is the routing priority of the i-th sub-block, L free (Ω i ) is the sub-block Ω i Available wiring length within Σnoise(Ω i ) is the sub-block Ω i The interference accumulation value within is λ1 and λ2 are weight coefficients.

9. The touch screen circuit board according to claim 1, characterized in that: The path reconstruction triggering condition of the dynamic signal channel network is: Among them, U k (t) indicates whether to trigger path reconstruction, A k (t) is the current path fitness function, μ k (t) is the interface usage status, A threshold is the preset path fitness threshold.

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