Ultra-high frequency signal generation and active interference-free access system and method in a strong interference environment

Abstract

The application provides an ultrahigh frequency signal generation and active non-interference access system in a strong interference environment, which comprises an ultrahigh speed sampling device, an impedance conversion unit and a general gain controllable amplifier; the ultrahigh speed sampling device is connected with an industrial network field bus and the general gain controllable amplifier, and the ultrahigh speed sampling device comprises a physical layer signal acquisition module, and an ultrahigh frequency excitation signal generation module is integrated in the physical layer signal acquisition module; based on the system, the ultrahigh frequency excitation signal generation module and the physical layer signal integrated acquisition module are used to send digital waveform information and a synchronous clock to a digital-analog continuous analog signal; the high frequency excitation signal is generated and accessed without affecting normal communication, so that the characteristics of the amplified reflected signal are laid for subsequent work such as capturing reflected signals, industrial field fault analysis positioning and the like, thereby solving the quality problem of the industrial field communication network.

Description

Technical Field

[0001] This invention belongs to the field of communication network technology, and in particular provides a system and method for generating ultra-high frequency signals and active interference-free access under strong interference environment. Background Technology

[0002] Industrial field communication networks, as a crucial component of modern industrial automation, play a vital role in achieving automation and intelligence in industrial production. However, in the complex and ever-changing industrial environment, due to factors such as electromagnetic interference and signal reflection, industrial field communication networks suffer from various uncertainties, including non-standard wiring, loose interfaces, aging cables, and improper grounding. This leads to frequent communication anomalies and difficult-to-locate communication faults. Particularly concerning is the issue of reflected signals, which themselves can cause crosstalk, noise, and other interference problems, severely impacting the transmission quality and performance of the communication system.

[0003] To address crosstalk and noise issues caused by transmitted signals, existing technologies typically employ methods such as reflected signal filtering and reflection signal cancellation to reduce their impact. However, these methods have limitations; for example, they cannot completely eliminate the influence of reflected signals, and they can still affect normal communication signals. Therefore, effectively capturing reflected signals without disrupting normal communication is of great significance for improving the quality of industrial field communication networks. Summary of the Invention

[0004] This invention aims to provide a method for generating and actively accessing ultra-high frequency signals in industrial field communication networks under strong interference environments. Its purpose is to generate and access high-frequency excitation signals without affecting normal communication, thereby amplifying the characteristics of reflected signals and laying the groundwork for subsequent work such as capturing reflected signals and analyzing and locating faults in industrial fields, thus solving the quality problems of industrial field communication networks.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The first aspect of this invention proposes an ultra-high frequency signal generation and active interference-free access system under strong interference environment, including an ultra-high speed sampling device, an impedance transformation unit and a universal gain controllable amplifier;

[0007] The ultra-high-speed sampling device is connected to an industrial network fieldbus and a general-purpose gain controllable amplifier. It is used to extract the superimposed signal data of distorted signals and step signals, and to perform signal processing based on the principle of reflected signal generation. The ultra-high-speed sampling device includes a physical layer signal acquisition module, which integrates an ultra-high frequency excitation signal generation module.

[0008] The physical layer signal acquisition module is connected to the fieldbus, the general-purpose gain controllable amplifier and the field local area network, and is used to acquire industrial field communication signals, including physical layer channels and signal conditioning channels;

[0009] The ultra-high frequency excitation signal generation module is connected to the physical layer channel and signal conditioning channel in the physical layer signal integration and acquisition module, and its output end is connected to the industrial field communication network to generate ultra-high frequency excitation signals and inject them into field communication.

[0010] The impedance transformation unit, along with a general-purpose gain-controllable amplifier and an industrial field communication network, is used for adjusting the input impedance.

[0011] The general-purpose gain-controllable amplifier is connected to an industrial field communication network to increase bandwidth and modulate signals.

[0012] Preferably, the physical layer signal integration and acquisition module includes a signal conditioning channel, a physical layer signal acquisition channel, a clock generation circuit, an ultra-high frequency excitation signal generation circuit module, a USB interface, a DDR memory unit, and a power management module. The signal conditioning channel receives normal signals transmitted in the industrial field network, which are then fed into the clock generation circuit. The clock signal and digital signal are then integrated and fed into the ultra-high frequency excitation signal generation circuit module. The USB interface is responsible for the data output of the FPGA, and the power management circuit is responsible for the overall power supply.

[0013] Preferably, the ultra-high frequency excitation signal generation module includes an FPGA module, a DAC chip, and an analog output channel;

[0014] The FPGA module includes a PCIe communication interface, waveform lookup, waveform storage, DDS, clock control, and channel control. It connects to the physical layer signal integration acquisition module and the DAC chip, receives clock signals and waveform data from the physical layer signal integration acquisition module, and transmits the waveform data information to the industrial field local area network via the USB interface.

[0015] The DAC chip connects to the FPGA module and analog output channel for digital-to-analog conversion;

[0016] The analog output channel consists of a preamplifier, attenuator, buffer amplifier, and passive low-pass filter. It connects to the industrial field network and DAC chip, and is used to amplify, attenuate, bias, and filter the signal, and inject the converted high-frequency excitation analog signal into the field communication network.

[0017] Preferably, the impedance transformation unit includes: a high / low frequency amplifier circuit, a DC / AC coupling selection circuit, an offset adjustment circuit, and an impedance transformation circuit; the impedance transformation circuit is connected to the signal output and is used to realize impedance transformation.

[0018] The offset adjustment circuit is connected to the offset input and used in conjunction with the amplifier circuit to adjust the DC offset of the signal.

[0019] High / low frequency amplifier circuits are used to amplify the amplitude of the input signal. DC / AC coupling circuits include capacitors and switches to switch the signal coupling mode; in DC coupling mode, DC signals can be transmitted, while in AC coupling mode, only AC signals can pass through.

[0020] Based on the above system, a second aspect of the present invention proposes a method for generating ultra-high frequency signals and actively bypassing interference in a strong interference environment, comprising the following steps:

[0021] Step 1: Use the physical layer signal integration and acquisition module to collect industrial field communication signals and send them to the ultra-high frequency excitation signal generation module. Use the physical layer signal integration and acquisition module and the ultra-high frequency excitation signal generation module to send digital waveform information and synchronization clock to the DAC chip.

[0022] Step 2: Output a preset continuous analog signal through a buffer amplifier and a low-pass filter;

[0023] Step 3: Achieve impedance matching with the signal test channel through the receiver port impedance transformation unit;

[0024] Step 4: Employ port adaptation technology to quickly and synchronously extract physical layer signals and ultra-high frequency excitation signals from interface signals;

[0025] Step 5: Use a general-purpose gain-controlled amplifier to achieve high-fidelity and high-bandwidth modulation of the signal.

[0026] Specifically, the frequency of the ultra-high frequency excitation signal is within the communication frequency range of the field automation network, which is 1-30MHz, with a preferred value of 25MHz.

[0027] Specifically, in step one, within the ultra-high frequency excitation signal generation module, the FPGA module receives the signal and sends the processed digital waveform information and synchronous clock to the high-speed DAC chip. Finally, the desired continuous analog signal is modulated and output through a buffer amplifier and a low-pass filter.

[0028] Specifically, in step one, the bandwidth is increased by using a low-noise gain controllable amplifier to ensure a lossless connection between the ultra-high frequency excitation signal and the normal communication signal of the industrial network.

[0029] In general, firstly, in environments with strong interference, to avoid affecting normal communication, a step signal is applied unidirectionally at the line terminal during the communication interval silence time. Alternatively, the superimposed signal data of the distorted signal and the step signal is captured using an ultra-high-speed sampling device, and signal processing is performed based on the principle of reflected signal generation. Furthermore, considering the bandwidth characteristics of the physical layer of existing fieldbuses and industrial Ethernet, setting the ultra-high frequency excitation signal to the communication frequency (1-30MHz) of the communication field automation network can meet the physical layer requirements of existing industrial field communication networks. Next, the industrial field communication signal is acquired using the physical layer signal integration acquisition module and sent to the ultra-high frequency excitation signal generation module. Within the ultra-high frequency excitation signal generation module, the FPGA receives the signal and sends the processed digital waveform information and synchronous clock to the high-speed DAC chip. Finally, the desired continuous analog signal is modulated and output through a buffer amplifier and a low-pass filter.

[0030] This completes the generation of the ultra-high frequency excitation signal.

[0031] To avoid interference from excitation signals to normal communication signals, this invention employs an impedance transformation unit at the receiving port to achieve impedance matching with the signal test channel, thereby reducing the impact of the physical layer signal integrated acquisition circuit module on the communication quality of industrial field communication networks.

[0032] Then, port adaptation technology is used to quickly and synchronously extract the physical layer signal and the ultra-high frequency excitation signal from the interface signal, and a low-noise gain controllable amplifier is designed to increase the bandwidth, ensuring a lossless connection between the ultra-high frequency excitation signal and the normal communication signal of the industrial network.

[0033] Finally, a general-purpose gain-controlled amplifier is used to achieve high-fidelity and high-bandwidth modulation of the signal.

[0034] This completes the connection of the ultra-high frequency excitation signal.

[0035] Beneficial effects:

[0036] 1. Facilitates effective capture of reflected signals: This invention utilizes the principle of reflected signal generation. By continuously generating ultra-high frequency excitation square wave signals, ultra-high frequency excitation signals can be applied in one direction at the line terminal during the silent period of the communication interval. This helps to intercept the superimposed signal data of distorted signals and ultra-high frequency excitation signals, thereby effectively capturing reflected signals and improving the acquisition efficiency and accuracy of reflected signals.

[0037] 2. Avoid interference with normal communication signals: This invention uses a receiving port impedance transformation unit to achieve impedance matching with the signal test channel, and uses port adapter technology to ensure a lossless connection between the two, which can avoid interference of the excitation signal with the normal communication signal and ensure the quality of the normal communication process.

[0038] 3. Adapting to the physical layer requirements of industrial field communication networks: This invention takes into account the bandwidth characteristics of the physical layer of existing fieldbus and industrial Ethernet. The ultra-high frequency excitation signal is set to 25MHz (the communication frequency of field automation network is 1~30MHz, with 25MHz being the preferred value), which can meet the physical layer requirements of existing industrial field communication networks and meet the needs of practical applications.

[0039] 4. High-bandwidth modulation: A general-purpose gain-controlled amplifier is connected after the impedance transformation unit to achieve high-bandwidth modulation. This general-purpose gain-controlled amplifier includes a low-noise gain-controlled amplifier and a DC-coupled gain-controlled amplifier. The low-noise gain-controlled amplifier increases the bandwidth, while the DC-coupled gain-controlled amplifier features DC offset adjustment, high-precision gain adjustment, 1-2-5 step gain control, and synchronous output of 4 differential signals. The general-purpose gain-controlled amplifier can modulate a maximum bandwidth of 4.5GHz, making it adaptable to various industrial field communication networks. Attached Figure Description

[0040] Figure 1 This is a flowchart of the main steps of signal generation and access in this invention;

[0041] Figure 2 This is a schematic diagram of the system and bus connection of the present invention;

[0042] Figure 3 This is a schematic diagram of the physical layer signal integrated acquisition circuit module of the present invention;

[0043] Figure 4 This is a schematic diagram of the ultra-high frequency excitation signal generation circuit module of the present invention;

[0044] Figure 5 This is a schematic diagram of the predefined waveform for generating a sine wave from the high-frequency excitation signal of the present invention;

[0045] Figure 6 This is a schematic diagram of the impedance transformation unit module of the present invention;

[0046] Figure 7 This is a simulation curve of the bandwidth of a general-purpose gain-controllable amplifier;

[0047] Figure 8 This is a schematic diagram of the method steps of the present invention. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] The first aspect of this invention proposes an ultra-high frequency signal generation and active interference-free access system under strong interference environment, including an ultra-high speed sampling device, an impedance transformation unit and a universal gain controllable amplifier;

[0050] The ultra-high-speed sampling device is connected to an industrial network fieldbus and a general-purpose gain controllable amplifier. It is used to extract the superimposed signal data of distorted signals and step signals, and to perform signal processing based on the principle of reflected signal generation. The ultra-high-speed sampling device includes a physical layer signal acquisition module, which integrates an ultra-high frequency excitation signal generation module.

[0051] like Figure 3 As shown, the physical layer signal acquisition module is connected to the fieldbus, the general-purpose gain controllable amplifier and the field local area network, and is used to acquire industrial field communication signals, including physical layer channels and signal conditioning channels;

[0052] The ultra-high frequency excitation signal generation module is connected to the physical layer channel and signal conditioning channel in the physical layer signal integration and acquisition module, and its output end is connected to the industrial field communication network to generate ultra-high frequency excitation signals and inject them into field communication.

[0053] The impedance transformation unit, along with a general-purpose gain-controllable amplifier and an industrial field communication network, is used for adjusting the input impedance.

[0054] The general-purpose gain controllable amplifier is connected to the impedance transformation unit and the industrial field communication network to improve bandwidth and perform signal modulation.

[0055] Furthermore, the physical layer signal integration and acquisition module includes a signal conditioning channel, a physical layer signal acquisition channel, a clock generation circuit, an ultra-high frequency excitation signal generation circuit module, a USB interface, a DDR memory unit, and a power management module. The signal conditioning channel receives normal signals transmitted in the industrial field network, which are then fed into the clock generation circuit. The clock signal and digital signal are then integrated and fed into the ultra-high frequency excitation signal generation circuit module. The USB interface is responsible for the data output of the FPGA, and the power management circuit is responsible for the overall power supply.

[0056] Furthermore, such as Figure 4 As shown, the ultra-high frequency excitation signal generation module includes an FPGA module, a DAC chip, and an analog output channel;

[0057] The FPGA module includes a PCIe communication interface, waveform lookup, waveform storage, DDS, clock control, and channel control. It connects to the physical layer signal integration acquisition module and the DAC chip, receives clock signals and waveform data from the physical layer signal integration acquisition module, and transmits the waveform data information to the industrial field local area network via the USB interface.

[0058] The DAC chip connects to the FPGA module and analog output channels for digital-to-analog conversion;

[0059] The analog output channel consists of a preamplifier, attenuator, buffer amplifier, and passive low-pass filter. It connects to the industrial field network and DAC chip, and is used to amplify, attenuate, bias, and filter the signal, and inject the converted high-frequency excitation analog signal into the field communication network.

[0060] Furthermore, such as Figure 6 As shown, the impedance transformation unit includes: a high / low frequency amplifier circuit, a DC / AC coupling selection circuit, an offset adjustment circuit, and an impedance transformation circuit; the impedance transformation circuit is connected to the signal output and is used to realize impedance transformation.

[0061] The offset adjustment circuit is used in conjunction with the amplifier circuit to adjust the DC offset of the signal;

[0062] High / low frequency amplifier circuits are used to amplify the amplitude of input signals. DC / AC coupling circuits include capacitors and switches to switch the coupling mode of the signal. In DC coupling mode, DC signals can be transmitted, while in AC coupling mode, only AC signals can be transmitted.

[0063] like Figure 8 As shown, based on the above system, the second aspect of this invention proposes a method for generating ultra-high frequency signals and active interference-free access under strong interference environments, comprising the following steps:

[0064] Step 1: Use the physical layer signal integration and acquisition module to collect industrial field communication signals and send them to the ultra-high frequency excitation signal generation module. Use the physical layer signal integration and acquisition module and the ultra-high frequency excitation signal generation module to send digital waveform information and synchronization clock to the DAC chip.

[0065] Step 2: Output a preset continuous analog signal through a buffer amplifier and a low-pass filter;

[0066] Step 3: Achieve impedance matching with the signal test channel through the receiver port impedance transformation unit;

[0067] Step 4: Employ port adaptation technology in interface signals ( Figure 3 Rapidly and synchronously extract physical layer signals and ultra-high frequency excitation signals from CH1 and CH2.

[0068] Step 5: Use a general-purpose gain-controlled amplifier to achieve high-fidelity and high-bandwidth modulation of the signal.

[0069] Specifically, the frequency of the ultra-high frequency excitation signal is within the communication frequency range of 1-30MHz for the field automation network.

[0070] Specifically, in step one, within the ultra-high frequency excitation signal generation module, the FPGA module receives the signal and sends the processed digital waveform information and synchronous clock to the high-speed DAC chip. Finally, the desired continuous analog signal is modulated and output through a buffer amplifier and a low-pass filter.

[0071] Specifically, in step one, the bandwidth is increased by using a low-noise gain controllable amplifier to ensure a lossless connection between the ultra-high frequency excitation signal and the normal communication signal of the industrial network.

[0072] like Figure 1 As shown, in a strong interference environment, to avoid affecting normal communication, based on the principle of reflected signal generation, a step signal applied unidirectionally to the line terminal is designed using the communication interval silence time; or, using the communication system's own waveform, the superimposed signal data of the distorted signal (including reflected signals and various crosstalk) and the step signal is extracted through ultra-high-speed sampling equipment. Furthermore, considering the bandwidth characteristics of the existing fieldbus and industrial Ethernet physical layer, the probe of the signal test channel is placed on the fieldbus to acquire signals. The ultra-high frequency excitation signal is set to 1-30MHz to meet the physical layer requirements of existing industrial field communication networks. The physical layer signal integrated acquisition module is directly connected to the industrial fieldbus, possessing signal acquisition capabilities, and has signal interface compatibility through port adapters.

[0073] The physical layer signal acquisition module for integrating ultra-high frequency excitation square wave signals into industrial field communication networks includes: a reference... Figure 3 As shown, the physical layer signal integration and acquisition module includes a signal conditioning channel, a physical layer signal acquisition channel, a clock generation circuit, an ultra-high frequency excitation signal generation circuit module, a USB interface, a DDR memory unit, and a power management module. The signal conditioning channel receives normal signals transmitted in the industrial field network, which are then fed into the clock generation circuit. The clock signal and digital signal are then integrated and fed into the ultra-high frequency excitation signal generation circuit module. The USB interface is responsible for the FPGA's data output to the local area network, and the power management circuit is responsible for the overall power supply (including waveform generation, signal conditioning channel, FPGA, and ADC power).

[0074] Reference Figure 4The diagram shows the overall system block diagram of the UHF excitation signal generation module. The UHF excitation signal generation module consists of three parts: an FPGA processing and control circuit, a digital-to-analog converter (DAC) chip, and an analog output channel. The FPGA, as the core of excitation signal processing and control, receives data sent from the host computer via the USB interface through a USB communication module. It then fills the waveform lookup table or arbitrary waveform memory, thereby realizing a DDS direct digital waveform synthesizer and sending the digital waveform information and synchronization clock to the high-speed DAC chip. The DAC chip converts the digital waveform into an analog waveform. Through the analog output channel, it performs analog signal conditioning such as transformation, amplification, attenuation, and adding DC bias. Finally, it outputs the desired continuous analog signal through a buffer amplifier and a low-pass filter. The UHF excitation signal (1-30MHz) generation module mainly generates UHF excitation signals, producing predefined waveforms such as sine waves and pulse waves. Sine waves can be used to verify the system's linearity, frequency response, and noise, and can help detect reflections and some low-frequency crosstalk problems in transmission lines. Pulse waves are used to evaluate propagation delay, time-domain response, and impulse response in signal transmission lines. Pulse waves can also provide more information for detecting reflections, crosstalk, and timing issues in transmission lines. The generated UHF excitation signal, such as... Figure 5 As shown in the figure, the diagram represents a predefined waveform of a sine wave.

[0075] This completes the generation of the ultra-high frequency excitation signal.

[0076] To avoid interference from excitation signals to normal communication signals, this invention first employs an impedance transformation unit at the receiving port to achieve impedance matching with the signal test channel, thereby reducing the impact of the physical layer signal integrated acquisition circuit module on the communication quality of the industrial field communication network. The impedance transformation unit includes: a high / low frequency amplifier circuit, a DC / AC coupling selection circuit, an offset adjustment circuit, and an impedance transformation circuit. The impedance transformation circuit is connected to the signal output and is used to transform the impedance. It can adapt the impedance of the input signal to the required impedance level of the output signal to optimize signal transmission and matching performance. The offset adjustment circuit is used in conjunction with the amplifier circuit to adjust the DC offset of the signal. It can adjust the signal offset according to the characteristics and requirements of the input signal to conform to a specific operating range or target. The high / low frequency amplifier circuit is represented by a rectangular symbol with a built-in amplification factor and is used to amplify the amplitude of the input signal. The DC / AC coupling circuit is a capacitor and switch section that allows switching the signal coupling mode as needed. In DC coupling mode, DC signals can be transmitted, while in AC coupling mode, only AC signals can be transmitted. This coupling selection switching can be performed according to the requirements of specific applications to achieve the transmission of DC or AC signals. Figure 6As shown, the impedance transformation unit can adjust the input impedance to adapt to industrial field communication networks with different output impedances.

[0077] Secondly, port adaptation technology is adopted to ensure a lossless connection between the industrial field communication network and the physical layer signal integration acquisition module. The port adaptation technology divides fieldbuses such as PROFIBUSDP, PA, CC-LINK, MODBUS, CANOpen, and FF H1, and industrial Ethernet such as PROFINET, POWERLINK, EtherCAT, FF HSE, MODBUS / TCP, and EPA into four interface types, including RJ45, DB9, 3.81-2, and 3.81-3 interface types. The specific implementation of the physical layer of the industrial field communication network protocol is not discussed. The physical layer signal and ultra-high frequency excitation signal are quickly and synchronously extracted from the above four types of interface signals. A low-noise gain controllable amplifier is designed to improve bandwidth. The DC-coupled gain controllable amplifier includes functions such as DC offset adjustment, high-precision gain adjustment, 1-2-5 step amplification control, and synchronous output of 4 differential signals. The combination of these two components forms a general-purpose gain-controlled amplifier, enabling bandwidth expansion and signal fidelity. By dynamically adjusting the gain (1-2-5 step amplification control) and DC offset, it ensures that the signal maintains steep waveform edges during transmission (e.g., optimized rise / fall times for square waves), reducing signal distortion. It supports continuous frequency response from DC to 4.5 GHz, adapting to the signal characteristics of different protocols to achieve signal fidelity and wideband coverage. Bandwidth simulation curves are shown below. Figure 7 As shown, this bandwidth simulation curve reveals the signal transmission characteristics of a general-purpose gain-controlled amplifier (GPCA) across different frequency ranges, providing information including transmission loss (represented by the S21 parameter). The bandwidth simulation curve displays the transmission loss (typically the S21 parameter) at different frequencies. Transmission loss represents the degree of signal attenuation within the GPCA. Changes in the curve show the signal loss across different frequency ranges. Finally, the amplifier is used to achieve high-bandwidth modulation; the GPCA modulation bandwidth can reach up to 4.5 GHz. The low noise figure (e.g., <3 dB) of the gain-controlled amplifier suppresses external electromagnetic interference (EMI) and thermal noise, improving the signal-to-noise ratio (SNR).

[0078] This completes the lossless access to UHF signals.

[0079] The overall technical solution has now been fully implemented.

[0080] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A system for generating ultra-high frequency signals and actively undisturbed access under strong interference environments, characterized in that, This includes ultra-high-speed sampling equipment, impedance transformation units, and general-purpose gain-controllable amplifiers; The ultra-high-speed sampling equipment is connected to the industrial network fieldbus, impedance transformation unit, and industrial network field LAN. It includes a physical layer signal acquisition module, which integrates an ultra-high frequency excitation signal generation module. The physical layer signal acquisition module is connected to the industrial network fieldbus, impedance transformation unit, and industrial network field LAN to acquire industrial field communication signals, including physical layer channels and signal conditioning channels. The ultra-high frequency excitation signal generation module has its input end connected to the physical layer channel and signal conditioning channel in the physical layer signal integrated acquisition module, and its output end connected to the impedance transformation unit, which is used to generate ultra-high frequency excitation signals and inject them into the industrial network fieldbus. The impedance transformation unit is connected to the physical layer signal acquisition module and the general-purpose gain controllable amplifier, and is used for adjusting the input impedance. The general-purpose gain controllable amplifier is connected to the impedance transformation unit and the industrial network fieldbus to improve bandwidth and perform signal modulation.

2. The UHF signal generation and active interference-free access system under strong interference environment according to claim 1, characterized in that, The physical layer signal integration and acquisition module includes a signal conditioning channel, a physical layer channel, a clock generation circuit, an ultra-high frequency excitation signal generation circuit module, a USB interface, a DDR memory unit, and a power management module. The signal conditioning channel receives normal signals transmitted in the industrial network fieldbus and sends them to the clock generation circuit. Then, the clock signal and digital signal are integrated and sent to the FPGA in the ultra-high frequency excitation signal generation circuit module. The USB interface is responsible for the data output of the FPGA, and the power management circuit is responsible for the overall power supply.

3. The ultra-high frequency signal generation and active interference-free access system under strong interference environment according to claim 1, characterized in that, The ultra-high frequency excitation signal generation module includes an FPGA module, a DAC chip, and an analog output channel; The FPGA module includes a PCIe communication interface, waveform lookup table, arbitrary waveform memory, DDS, clock control, and channel control. It connects to the physical layer signal integration acquisition module and DAC chip, receives clock signals and waveform data from the physical layer signal integration acquisition module, and transmits waveform data information to the industrial network local area network via USB interface. The DAC chip connects to the FPGA module and analog output channel for digital-to-analog conversion; The analog output channel consists of a preamplifier, attenuator, buffer amplifier, and passive low-pass filter. It connects to the industrial field network and DAC chip to amplify, attenuate, bias, and filter the signal, and injects the converted high-frequency excitation analog signal into the industrial network fieldbus.

4. The UHF signal generation and active interference-free access system under strong interference environment according to claim 1, characterized in that, The impedance transformation unit includes: a high / low frequency amplifier circuit, a DC / AC coupling selection circuit, an offset adjustment circuit, and an impedance transformation circuit; Impedance transformation circuits are connected to signal outputs and are used to transform impedance. The offset adjustment circuit is connected to the offset input and is used to adjust the DC offset of the signal; High / low frequency amplifier circuits are used to amplify the amplitude of input signals. DC / AC coupling circuits include capacitors and switches to switch the coupling mode of the signal. In DC coupling mode, DC signals can be transmitted, while in AC coupling mode, only AC signals can be transmitted.

5. A method for generating and actively accessing ultra-high frequency signals under strong interference conditions based on the system described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Use the physical layer signal acquisition module to acquire industrial field communication signals and send them to the ultra-high frequency excitation signal generation module. The ultra-high frequency excitation signal generation module then sends the digital waveform information and synchronization clock to the DAC chip. Step 2: Output a preset continuous analog signal through a buffer amplifier and a passive low-pass filter; Step 3: Achieve impedance matching with the signal test channel through the receiver port impedance transformation unit; Step 4: Employ port adaptation technology to quickly and synchronously extract physical layer signals and ultra-high frequency excitation signals from interface signals; Step 5: Use a general-purpose gain-controlled amplifier to achieve high-fidelity and high-bandwidth modulation of the signal.

6. The method for generating and actively accessing ultra-high frequency signals under strong interference environments according to claim 5, characterized in that, The frequency of the ultra-high frequency excitation signal is the communication frequency of the field automation network, ranging from 1 to 30 MHz.

7. The method for generating and actively accessing ultra-high frequency signals under strong interference environments according to claim 5, characterized in that, In step one, within the ultra-high frequency excitation signal generation module, the FPGA module receives the signal and sends the processed digital waveform information and synchronous clock to the high-speed DAC chip. Finally, the desired continuous analog signal is modulated and output through a buffer amplifier and a passive low-pass filter.

8. The method for generating and actively accessing ultra-high frequency signals under strong interference environments according to claim 5, characterized in that, In step five, the bandwidth is increased by a gain-controllable amplifier to ensure a lossless connection between the ultra-high frequency excitation signal and the normal communication signal of the industrial network.

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