Ultrahigh frequency signal generation and active undisturbed access system and method in strong interference environment

Abstract

The invention provides an ultrahigh-frequency signal generation and active undisturbed access system in a strong interference environment. The system comprises ultrahigh-speed sampling equipment, an impedance conversion unit and a general gain controllable amplifier, the ultra-high-speed sampling equipment is connected with the industrial network field bus and the general gain controllable amplifier, the ultra-high-speed sampling equipment comprises a physical layer signal acquisition module, and an ultra-high-frequency excitation signal generation module is integrated in the physical layer signal acquisition module. According to the invention, digital waveform information and a synchronous clock are sent to digital-analog continuous analog signals by using a physical layer signal integrated acquisition module and an ultrahigh frequency excitation signal generation module; a high-frequency excitation signal is generated and accessed on the premise that normal communication is not affected, so that reflection signal characteristics are amplified to lay a foundation for subsequent work such as subsequent reflection signal capturing and industrial field fault analysis and positioning, and the quality problem of an industrial field communication network is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of communication networks, and in particular provides a system and method for generating ultra-high frequency signals and actively accessing them without interference in a strong interference environment. Background Art

[0002] As a crucial component of modern industrial automation, industrial field communication networks play a vital role in achieving automated and intelligent industrial production. However, due to complex and variable environmental interference factors such as electromagnetic interference and signal reflections, industrial field communication networks are subject to numerous uncertainties, including irregular wiring, loose interfaces, aging cables, and improper grounding. These issues lead to frequent and difficult-to-locate communication anomalies and field failures. This is particularly true for reflected signals, which can cause crosstalk, noise, and other interference, severely impacting the transmission quality and performance of communication systems.

[0003] In order to solve the crosstalk and noise problems caused by the transmitted signal, existing technologies usually use methods such as reflection signal filtering and reflection signal elimination to reduce the impact of the reflected signal. However, these methods have some limitations. For example, they cannot completely eliminate the impact of the reflected signal and will have a certain impact on the normal communication signal. Therefore, how to effectively capture the reflected signal without affecting normal communication is of great significance to improving the quality of industrial field communication networks. Summary of the Invention

[0004] The present invention aims to provide a method for generating ultra-high frequency (UHF) signals and actively undisturbed access to industrial field communication networks in a strong interference environment. The method aims to generate and access high-frequency excitation signals without affecting normal communication, thereby amplifying the characteristics of reflected signals and paving the way for subsequent work such as capturing reflected signals and locating industrial field faults, thereby solving quality problems in industrial field communication networks.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The first aspect of the present invention provides a system for generating ultra-high frequency signals and actively undisturbed access in a strong interference environment, comprising an ultra-high-speed sampling device, an impedance conversion unit, and a universal gain-controllable amplifier;

[0007] The ultra-high-speed sampling device is connected to the industrial network field bus and the universal gain controllable amplifier, and is used to intercept the superimposed signal data portion of the distorted signal and the step signal, and perform signal processing based on the reflection signal generation principle. The ultra-high-speed sampling device includes a physical layer signal acquisition module, and the physical layer signal acquisition module is integrated with an ultra-high frequency excitation signal generation module;

[0008] The physical layer signal acquisition module is connected to the field bus, the universal gain controllable amplifier and the field local area network, and is used to collect industrial field communication signals, including a physical layer channel and a signal conditioning channel;

[0009] The UHF excitation signal generating module is connected to the physical layer channel and signal conditioning channel in the physical layer signal integration and acquisition module, and the output end is connected to the industrial field communication network, for generating UHF excitation signals and injecting them into field communications;

[0010] The impedance conversion unit, together with the universal gain controllable amplifier and the industrial field communication network, is used to adjust the input impedance;

[0011] The universal gain controllable amplifier is connected to the industrial field communication network and is used to increase bandwidth and perform signal modulation.

[0012] Preferably, the physical layer signal integration 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, wherein the signal conditioning channel accesses the normal signal transmitted in the industrial field network, the input clock generation circuit then integrates the clock signal and the digital signal and transmits it to 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 generating module includes an FPGA module, a DAC chip, and an analog output channel;

[0014] The FPGA module includes a PCIe communication interface, waveform search, waveform storage, DDS, clock control, and channel control. It is connected to the physical layer signal integration acquisition module and the DAC chip, receives the clock signal and waveform data from the physical layer signal integration acquisition module, and transmits the waveform data information to the industrial site LAN through the USB interface.

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

[0016] The analog output channel, consisting of a pre-amplifier, attenuator, buffer amplifier, and passive low-pass filter, connects the industrial field network and the DAC chip. It 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 conversion unit includes: a high / low frequency amplification circuit, a DC / AC coupling selection circuit, an offset adjustment circuit, and an impedance conversion circuit; the impedance conversion circuit is connected to the signal output to achieve impedance conversion;

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

[0019] The high / low frequency amplifier circuit is used to amplify the amplitude of the input signal. The DC / AC coupling circuit includes capacitors and switches for switching the signal coupling mode. In DC coupling mode, DC signals can be transmitted, while in AC coupling mode, only AC signals can pass.

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

[0021] Step 1: Use the physical layer signal integration 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 acquisition module and the ultra-high frequency excitation signal generation module to send digital waveform information and synchronous 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: Use the receiving port impedance conversion unit to achieve impedance matching with the signal test channel;

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

[0025] Step 5: Use a universal gain-controllable amplifier to achieve modulation with signal fidelity and high bandwidth.

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

[0027] Specifically, in step one, within the ultra-high frequency excitation signal generating module, the FPGA module receives the signal and sends the processed digital waveform information and synchronization clock to the high-speed DAC chip, and finally modulates and outputs the desired continuous analog signal through the buffer amplifier and low-pass filter.

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

[0029] Generally speaking, in strong interference environments, to avoid disrupting normal communication, a step signal is applied unidirectionally at the line terminal during the communication interval silence period. Alternatively, an ultra-high-speed sampling device can be used to capture the superimposed signal data portion of the distorted and step signals, allowing for signal processing based on the principle of reflected signal generation. Furthermore, considering the bandwidth characteristics of the existing fieldbus and industrial Ethernet physical layers, the ultra-high frequency excitation signal is set to the communication frequency of the field automation network (1-30MHz) to meet the physical layer requirements of existing industrial field communication networks. The physical layer signal integration and acquisition module then collects the industrial field communication signal and transmits it to the ultra-high frequency excitation signal generation module. Within the module, the FPGA receives the signal and transmits the processed digital waveform information and synchronization clock to the high-speed DAC chip. Finally, a buffer amplifier and low-pass filter are used to modulate the output of the desired continuous analog signal.

[0030] At this point, the generation of the ultra-high frequency excitation signal is completed.

[0031] In order to avoid the interference of the excitation signal on the normal communication signal, the present invention adopts the impedance conversion unit of 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;

[0032] Then, the 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 universal gain controllable amplifier is used to achieve modulation with signal fidelity and high bandwidth.

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

[0035] Beneficial effects:

[0036] 1. Helps to effectively capture reflected signals: This invention utilizes the reflection signal generation principle. By continuously generating an ultra-high frequency excitation square wave signal, it can apply an ultra-high frequency excitation signal in a single direction at the line terminal during the communication interval silence, thereby helping to intercept the superimposed signal data portion of the distorted signal and the ultra-high frequency excitation signal, so as to effectively capture the reflected signal and improve the collection efficiency and accuracy of the reflected signal.

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

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

[0039] 4. High-bandwidth modulation: A universal gain-controlled amplifier is connected to the impedance conversion unit to achieve high-bandwidth modulation. The universal gain-controlled amplifier includes a low-noise gain-controlled amplifier and a DC-coupled gain-controlled amplifier. The low-noise gain-controlled amplifier can increase the bandwidth. The DC-coupled gain-controlled amplifier includes functions such as DC offset adjustment, high-precision gain adjustment, 1-2-5 step-by-step gain control, and 4-way differential signal synchronous output. The universal gain-controlled amplifier can modulate a maximum bandwidth of 4.5GHz, making it suitable for different industrial field communication networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a flow chart of the main steps of signal generation and access of the present invention;

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

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

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

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

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

[0046] Figure 7 It is the bandwidth simulation curve of general gain controllable amplifier;

[0047] Figure 8 It is a schematic flow chart of the steps of the method of the present invention. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention and not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0049] The first aspect of the present invention provides a system for generating ultra-high frequency signals and actively undisturbed access in a strong interference environment, comprising an ultra-high-speed sampling device, an impedance conversion unit, and a universal gain-controllable amplifier;

[0050] The ultra-high-speed sampling device is connected to the industrial network field bus and the universal gain controllable amplifier, and is used to intercept the superimposed signal data portion of the distorted signal and the step signal, and perform signal processing based on the reflection signal generation principle. The ultra-high-speed sampling device includes a physical layer signal acquisition module, and the physical layer signal acquisition module is integrated with an ultra-high frequency excitation signal generation module;

[0051] like Figure 3 As shown, the physical layer signal acquisition module is connected to the field bus, the universal gain controllable amplifier and the field LAN, and is used to collect industrial field communication signals, including a physical layer channel and a signal conditioning channel;

[0052] The UHF excitation signal generating module is connected to the physical layer channel and signal conditioning channel in the physical layer signal integration and acquisition module, and the output end is connected to the industrial field communication network, for generating UHF excitation signals and injecting them into field communications;

[0053] The impedance conversion unit, together with the universal gain controllable amplifier and the industrial field communication network, is used to adjust the input impedance;

[0054] The universal gain controllable amplifier is connected to the impedance conversion unit and the industrial field communication network, and is used to increase bandwidth and perform signal modulation.

[0055] Furthermore, the physical layer signal integration 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, wherein the signal conditioning channel accesses the normal signal transmitted in the industrial field network, the input clock generation circuit then integrates the clock signal and the digital signal and transmits it to 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] Further, 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 search, waveform storage, DDS, clock control, and channel control. It is connected to the physical layer signal integration acquisition module and the DAC chip, receives the clock signal and waveform data from the physical layer signal integration acquisition module, and transmits the waveform data information to the industrial site LAN through the USB interface.

[0058] DAC chip, connected to the FPGA module and analog output channel for digital-to-analog conversion;

[0059] The analog output channel, consisting of a pre-amplifier, attenuator, buffer amplifier, and passive low-pass filter, connects the industrial field network and the DAC chip. It 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] Further, such as Figure 6 As shown, the impedance conversion unit includes: a high / low frequency amplification circuit, a DC / AC coupling selection circuit, an offset adjustment circuit, and an impedance conversion circuit; the impedance conversion circuit is connected to the signal output to achieve impedance conversion;

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

[0062] The high / low frequency amplifier circuit is used to amplify the amplitude of the input signal. The DC / AC coupling circuit includes a capacitor and a switch part, which is used to switch the coupling mode of the signal. That is, in the DC coupling mode, the DC signal can be transmitted, while in the AC coupling mode, only the AC signal can pass.

[0063] like Figure 8 As shown, based on the above system, the second aspect of the present invention proposes a method for generating an ultra-high frequency signal and actively undisturbed access in a strong interference environment, comprising the following steps:

[0064] Step 1: Use the physical layer signal integration 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 acquisition module and the ultra-high frequency excitation signal generation module to send digital waveform information and synchronous 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: Use the receiving port impedance conversion unit to achieve impedance matching with the signal test channel;

[0067] Step 4: Use port adapter technology to interface signal ( Figure 3 Rapid and synchronous extraction of physical layer signals and ultra-high frequency excitation signals in CH1 and CH2;

[0068] Step 5: Use a universal gain-controllable amplifier to achieve modulation with signal fidelity and high bandwidth.

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

[0070] Specifically, in step one, within the ultra-high frequency excitation signal generating module, the FPGA module receives the signal and sends the processed digital waveform information and synchronization clock to the high-speed DAC chip, and finally modulates and outputs the desired continuous analog signal through the buffer amplifier and low-pass filter.

[0071] Specifically, in step one, the bandwidth is increased by a low-noise gain controllable amplifier to ensure 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 disrupting normal communication, a unidirectional step signal is designed for line terminals based on the principle of reflected signal generation and utilizing the communication interval silence period. Alternatively, the communication system's inherent waveform is utilized, and ultra-high-speed sampling equipment is used to capture the superimposed signal data portion of the distorted signal (including reflected signals and various crosstalk) and the step signal. Furthermore, considering the bandwidth characteristics of the existing fieldbus and industrial Ethernet physical layers, the signal test channel probe is placed on the fieldbus to collect signals. Setting the ultra-high frequency excitation signal to 1-30MHz meets the physical layer requirements of existing industrial field communication networks. The physical layer signal integration acquisition module directly connects to the industrial fieldbus, providing signal acquisition capabilities and signal interface compatibility through port adaptation.

[0073] The ultra-high frequency excitation square wave signal is integrated into the physical layer signal integration and acquisition module of the industrial field communication network, including: Figure 3 As shown in the figure, 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 on the industrial field network. The clock generation circuit then integrates the clock signal and digital signals and transmits them to 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. The power management circuit is responsible for the overall power supply (including waveform generation, signal conditioning channel, FPGA, and ADC power supply).

[0074] Reference Figure 4The following is the overall system block diagram of the ultra-high frequency excitation signal generation module. The module consists of three components: an FPGA processing and control circuit, a digital-to-analog converter (DAC), and analog output channels. The FPGA, serving as the processing and control core for the excitation signal generation, receives data from the host computer via the USB interface via the USB communication module. It then populates a waveform lookup table or arbitrary waveform memory, implementing a DDS direct digital waveform synthesizer (DDS) and transmits 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 a DC bias. Finally, it outputs the desired continuous analog signal through a buffer amplifier and low-pass filter. The ultra-high frequency excitation signal (1-30MHz) generation module primarily generates ultra-high frequency excitation signals, producing predefined waveforms such as sine and pulse waves. Sine waves can be used to verify system linearity, frequency response, and noise, and can help detect reflections and some low-frequency crosstalk issues 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 problems in transmission lines. The generated ultra-high frequency excitation signal is as follows: Figure 5 As shown, the figure shows the predefined sine wave waveform.

[0075] At this point, the generation of the ultra-high frequency excitation signal is completed.

[0076] In order to avoid the interference of the excitation signal on the normal communication signal, the present invention first adopts the impedance conversion unit of 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 conversion unit includes: a high / low frequency amplification circuit, a DC / AC coupling selection circuit, an offset adjustment circuit, and an impedance conversion circuit. The impedance conversion circuit is connected to the signal output to achieve impedance conversion. It can adapt the impedance of the input signal to the impedance level required by the output signal to optimize the transmission and matching performance of the signal. The offset adjustment circuit is used in conjunction with the amplification circuit to adjust the DC offset of the signal. It can adjust the offset of the signal according to the characteristics and requirements of the input signal to make it meet a specific working range or target. The high / low frequency amplification circuit is represented by a rectangular symbol with a built-in amplification factor, which is used to amplify the amplitude of the input signal. The DC / AC coupling circuit is a capacitor and switch part that allows the coupling mode of the signal to be switched as needed. In DC coupling mode, DC signals can be transmitted, while in AC coupling mode, only AC signals can pass. This switching of coupling selection can be performed according to the requirements of a specific application to achieve the transmission of DC or AC signals. As Figure 6The impedance conversion unit can adjust the input impedance so that it can adapt to industrial field communication networks with different output impedances.

[0077] Secondly, port adaptation technology is used to ensure lossless connection between the industrial field communication network and the physical layer signal integration and acquisition module of the two. Port adaptation technology is to divide field buses such as PROFIBUSDP, PA, CC-LINK, MODBUS, CANOpen, FF H1, and industrial Ethernet such as PROFINET, POWERLINK, EtherCAT, FF HSE, MODBUS / TCP, EPA into four types of interface types through different types of bus interfaces, 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, and a low-noise gain-controlled amplifier is designed to increase bandwidth. The DC-coupled gain-controlled amplifier includes DC offset adjustment, high-precision gain adjustment, gain 1-2-5 step amplification control, and 4-channel differential signal synchronous output functions. The combination of the two forms a universal gain-controlled amplifier that can achieve bandwidth expansion and signal fidelity. By dynamically adjusting the gain (1-2-5 step-by-step amplification control) and DC offset, it ensures that the signal maintains a sharp waveform edge during transmission (such as optimizing the rise / fall time of a square wave) and reduces signal distortion. It supports a continuous frequency response from DC to 4.5GHz, adapting to the signal characteristics of different protocols to achieve signal fidelity and broadband coverage. The bandwidth simulation curve is as follows: Figure 7 As shown in the figure, this bandwidth simulation curve can be used to understand the signal transmission characteristics of a universal gain-controlled amplifier over different frequency ranges. It also provides information on transmission loss (represented by the S21 parameter). The bandwidth simulation curve can display the transmission loss (usually the S21 parameter) at different frequencies. Transmission loss indicates the degree of signal attenuation in the universal gain-controlled amplifier. The changes in the curve can show the amplifier's signal loss over different frequency ranges. Finally, the amplifier can be used to achieve high-bandwidth modulation. The universal gain-controlled amplifier can achieve a maximum modulation bandwidth of 4.5 GHz. The gain-controlled amplifier's low noise figure (e.g., <3 dB) suppresses external electromagnetic interference (EMI) and thermal noise, improving the signal-to-noise ratio (SNR).

[0078] At this point, lossless access of UHF signals is completed.

[0079] At this point, the overall technical solution has 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 present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall 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 in a strong interference environment, characterized in that: It includes an ultra-high-speed sampling device, an impedance conversion unit, and a universal gain-controllable amplifier; The ultra-high-speed sampling device is connected to the industrial network field bus and the universal gain controllable amplifier, and includes a physical layer signal acquisition module, in which an ultra-high frequency excitation signal generation module is integrated; The physical layer signal acquisition module is connected to the field bus, the universal gain controllable amplifier and the field local area network, and is used to collect industrial field communication signals, including a physical layer channel and a signal conditioning channel; The UHF excitation signal generating module is connected to the physical layer channel and signal conditioning channel in the physical layer signal integration and acquisition module, and the output end is connected to the industrial field communication network, for generating UHF excitation signals and injecting them into field communications; The impedance conversion unit is connected to the universal gain controllable amplifier and the industrial field communication network to adjust the input impedance; The universal gain controllable amplifier is connected to the industrial field communication network and is used to increase bandwidth and perform signal modulation.

2. The system for generating ultra-high frequency signals and providing active non-interference access in a strong interference environment according to claim 1, characterized in that: The physical layer signal integration 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 accesses the normal signal transmitted in the industrial field network, and the input clock generation circuit then integrates the clock signal and the digital signal and transmits them to 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 UHF signal generation and active non-interference access system in a strong interference environment according to claim 1, characterized in that: The ultra-high frequency excitation signal generating module includes an FPGA module, a DAC chip, and an analog output channel; The FPGA module includes a PCIe communication interface, waveform search, waveform storage, 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 site LAN through the USB interface. DAC chip, connected to the FPGA module and analog output channel for digital-to-analog conversion; The analog output channel, consisting of a pre-amplifier, attenuator, buffer amplifier, and passive low-pass filter, connects the industrial field network and the DAC chip. It is used to amplify, attenuate, bias, and filter the signal and inject the converted high-frequency excitation analog signal into the field communication network.

4. The system for generating ultra-high frequency signals and providing active non-interference access in a strong interference environment according to claim 1, wherein: The impedance conversion unit includes: a high / low frequency amplification circuit, a DC / AC coupling selection circuit, an offset adjustment circuit, and an impedance conversion circuit; The impedance conversion circuit is connected to the signal output to realize impedance conversion; The offset adjustment circuit is connected to the offset input and is used to adjust the DC offset of the signal; The high / low frequency amplifier circuit is used to amplify the amplitude of the input signal. The DC / AC coupling circuit includes a capacitor and a switch part, which is used to switch the coupling mode of the signal. That is, in the DC coupling mode, the DC signal can be transmitted, while in the AC coupling mode, only the AC signal can pass.

5. A method for generating ultra-high frequency signals and actively undisturbed access in a strong interference environment based on the system according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Use the physical layer signal integration 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 acquisition module and the ultra-high frequency excitation signal generation module to send digital waveform information and synchronization clock to the DAC chip; Step 2: Output a preset continuous analog signal through a buffer amplifier and a low-pass filter; Step 3: Use the receiving port impedance conversion unit to achieve impedance matching with the signal test channel; Step 4: Use port adaptation technology to quickly and synchronously extract the physical layer signal and the ultra-high frequency excitation signal from the interface signal; Step 5: Use a universal gain-controllable amplifier to achieve modulation with signal fidelity and high bandwidth.

6. The method for generating ultra-high frequency signals and performing active non-disturbance access in a strong interference environment according to claim 5, wherein: The frequency of the ultra-high frequency excitation signal is in the communication field automation network communication frequency range of 1-30 MHz.

7. The method for generating ultra-high frequency signals and performing active non-disturbance access in a strong interference environment according to claim 5, wherein: In step 1, within the ultra-high frequency excitation signal generation module, the FPGA module receives the signal and sends the processed digital waveform information and synchronization clock to the high-speed DAC chip, which is then modulated through a buffer amplifier and a low-pass filter to output the desired continuous analog signal.

8. The method for generating ultra-high frequency signals and performing active non-disturbance access in a strong interference environment according to claim 5, wherein: In step 1, the bandwidth is increased through a low-noise gain-controlled amplifier to ensure lossless connection between the ultra-high frequency excitation signal and the normal communication signal of the industrial network.

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