Method and device for recording and simulating trackside space electromagnetic environment of high-speed railway

Abstract

The embodiment of the invention discloses a high-speed railway trackside space electromagnetic environment recording and simulating method and device. A high-speed railway system comprises a field acquisition test subsystem and a signal reconstruction test subsystem. Comprising the following steps: collecting field electromagnetic field intensity data externally generated by an electromagnetic interference source of the high-speed railway system through the field collecting and testing subsystem; obtaining related design parameters of the high-speed railway system and external area parameters of the simulation position; reconstructing the field electromagnetic field intensity data, the design parameters and the external area parameters through the signal reconstruction test subsystem to obtain a field electromagnetic interference field intensity signal; and inputting the field electromagnetic interference field intensity signal to the electromagnetic sensitive equipment to enable the electromagnetic sensitive equipment to perform operation simulation so as to obtain whether the electromagnetic sensitive equipment operates normally based on the field electromagnetic interference field intensity signal.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a method and device for recording and simulating the electromagnetic environment of the trackside space of a high-speed railway. Background Art

[0002] With the rapid development of high-speed railways, which use electric traction EMUs for operation, the traction power supply system of the trains will generate electromagnetic interference, causing electromagnetic impact on the related equipment of the high-speed railway system (mainly related equipment that is sensitive to electromagnetics). At the same time, the increase in the operating speed of high-speed railways, the update of EMU models, and the increase in train traction power have made the electromagnetic environment of the related equipment of the high-speed railway system more complex.

[0003] In order to ensure the safety, reliability and stability of the relevant equipment of the high-speed railway system in use, it is necessary to conduct electromagnetic compatibility certification tests. Most of the existing certification tests use single-item immunity tests. The standards based on single-item immunity tests are mostly fixed interference signals formed by comprehensive consideration of multiple factors, and the test process adopts the method of testing and inspecting each item separately. This method has the following problems:

[0004] 1. Fixed interference signals cannot truly reflect the actual electromagnetic interference situation on site, which may lead to inaccurate test results;

[0005] 2. The method of conducting inspections and tests item by item is inefficient and cannot meet the needs of the rapidly developing high-speed railway system. Summary of the invention

[0006] One or more embodiments of the present specification provide a method and device for recording and simulating the electromagnetic environment of the trackside space of a high-speed railway, which is used to solve the technical problems raised by the background technology.

[0007] One or more embodiments of this specification adopt the following technical solutions:

[0008] One or more embodiments of this specification provide a method for recording and simulating the electromagnetic environment of the space beside the high-speed railway track, the method is applied to the high-speed railway system, the high-speed railway system includes: a field acquisition test subsystem and a signal reconstruction test subsystem; the method includes:

[0009] The on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system is collected by the on-site collection test subsystem;

[0010] Obtaining relevant design parameters of the high-speed railway system and external area parameters of the simulation location;

[0011] The signal reconstruction test subsystem reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters to obtain an on-site electromagnetic interference field strength signal;

[0012] The on-site electromagnetic interference field strength signal is input into the electromagnetic sensitive device so that the electromagnetic sensitive device performs operation simulation, thereby obtaining whether the electromagnetic sensitive device operates normally based on the on-site electromagnetic interference field strength signal.

[0013] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0014] Improve the accuracy of test results: Collecting on-site electromagnetic field strength data can truly reflect the actual electromagnetic interference situation and avoid the limitations of fixed interference signals. By reconstructing on-site data with design parameters and external area parameters, the obtained on-site electromagnetic interference field strength signal is closer to the actual situation, thereby improving the accuracy of test results.

[0015] Improve test efficiency: reconstruct the on-site electromagnetic field strength data, design parameters and external area parameters to obtain the on-site electromagnetic interference field strength signal, and test multiple electromagnetic sensitive devices at one time, avoiding the inefficient way of testing and inspecting each item separately. This can greatly improve the test efficiency and meet the needs of the rapid development of high-speed railway systems.

[0016] Discover problems in advance and take measures: By inputting the on-site electromagnetic interference field strength signal into the electromagnetic sensitive equipment for operation simulation, problems that may occur in the actual operation of the equipment can be discovered in advance. In this way, measures can be taken in time to improve and optimize, thereby improving the reliability and stability of the equipment.

[0017] Improve the safety and reliability of the system: Ensuring the normal operation of electromagnetic sensitive equipment in a complex electromagnetic environment helps improve the safety and reliability of the high-speed railway system. Reducing the impact of electromagnetic interference on equipment can reduce the probability of failure and ensure the normal operation of the train.

[0018] Furthermore, the field acquisition test subsystem includes an acquisition receiving module and an electromagnetic field strength analysis module;

[0019] The collecting of on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system through the on-site collection test subsystem includes:

[0020] Based on a preset high-speed railway line structure, the on-site electromagnetic emission data generated by the electromagnetic interference source of the high-speed railway system is collected by the collection and receiving module;

[0021] The on-site electromagnetic emission data is processed by the electromagnetic field strength analysis module to obtain the on-site electromagnetic field strength data.

[0022] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0023] Improve the accuracy of data collection: Through the pre-set high-speed railway line structure, the acquisition and receiving module can more specifically collect the on-site electromagnetic emission data generated by the electromagnetic interference source, reduce the interference of irrelevant data, and improve the accuracy of data collection.

[0024] Improve the efficiency of data analysis: The electromagnetic field strength analysis module can quickly process the collected on-site electromagnetic emission data to obtain on-site electromagnetic field strength data, thereby improving the efficiency of data analysis.

[0025] Provide reliable data support for subsequent electromagnetic compatibility certification tests: By collecting on-site electromagnetic field strength data, it provides reliable data support for subsequent electromagnetic compatibility certification tests, which helps to ensure the safety, reliability and stability of related equipment in the high-speed railway system during operation.

[0026] Furthermore, the pre-set high-speed railway line structure includes a first line structure for collecting the on-site electromagnetic emission data by fixing a designated sensor at a trackside position, and a second line structure for collecting the on-site electromagnetic emission data by installing the designated sensor on a drone. The first line structure includes a line structure that is convenient for installation at a trackside position, and the second line structure includes a line structure that is not convenient for installation at a trackside position.

[0027] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0028] Improve the flexibility of data collection: By setting different high-speed railway line structures, including the first line structure that is easy to install at the trackside and the second line structure that is not easy to install at the trackside, the appropriate line structure can be selected according to the actual situation to collect electromagnetic emission data on site. This improves the flexibility of data collection and can adapt to different collection environments and needs.

[0029] Ensure the comprehensiveness of data collection: The combination of the first line structure and the second line structure can cover more collection locations and scenarios. The first line structure is suitable for collection at trackside locations, while the second line structure can collect data that is not convenient to install at trackside locations by installing designated sensors on drones. This ensures the comprehensiveness of data collection and more accurately reflects the electromagnetic interference of the high-speed railway system.

[0030] Adapt to different line conditions: Different high-speed railway lines may have different characteristics and conditions. By presetting different line structures, the most suitable data collection method can be selected according to the specific conditions of the line. This helps to improve the accuracy and reliability of data collection and better meet the requirements of electromagnetic compatibility certification tests.

[0031] Improve the efficiency of data collection: According to the characteristics of the line structure and the collection requirements, the first line structure or the second line structure can be reasonably selected to improve the efficiency of data collection. For example, when it is convenient to install at the trackside, the first line structure can complete data collection more quickly; and when it is not convenient to install at the trackside, the second line structure can collect data more flexibly.

[0032] Furthermore, the electromagnetic field strength analysis module includes a frequency conversion submodule, a real-time spectrum analysis submodule, a digital fluorescent display submodule, a signal capture submodule and a high-speed transmission storage submodule;

[0033] The step of processing the on-site electromagnetic emission data by the electromagnetic field strength analysis module to obtain the on-site electromagnetic field strength data includes:

[0034] The signal input port of the frequency conversion submodule is connected to the acquisition receiving module to convert the on-site electromagnetic emission data into a voltage signal, and the voltage signal is attenuated, frequency-selective filtered and multi-order mixed to achieve frequency change of the voltage signal;

[0035] The real-time spectrum analysis submodule digitizes and corrects the frequency-changing voltage signal through high-speed sampling, and performs calculation and output of the on-site electromagnetic field strength data through digital down-conversion and a combination of multiple Fourier transforms, and the on-site electromagnetic field strength data is a real-time spectrum transformation;

[0036] The input port of the signal capture submodule is connected to the signal output port of the real-time spectrum analysis submodule to receive the on-site electromagnetic field strength data, and store the on-site electromagnetic field strength data in the high-speed transmission storage submodule;

[0037] The frequency domain waveform output by the on-site electromagnetic field strength data is rasterized by the digital fluorescent display submodule, and a frequency signal is output through superposition accumulation, bitmap database update, color coding and curve mapping, and the frequency signal is displayed on the display screen built into the digital fluorescent display submodule.

[0038] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0039] Realize signal frequency conversion: The frequency conversion submodule converts the on-site electromagnetic emission data into a voltage signal, and performs attenuation, frequency selection filtering and multi-order mixing to realize the frequency change of the voltage signal, providing a basis for subsequent spectrum analysis.

[0040] Real-time spectrum analysis: The real-time spectrum analysis submodule digitizes and corrects the frequency-changing voltage signal through high-speed sampling, performs calculations through digital down-conversion and a combination of multiple Fourier transforms, and realizes real-time spectrum conversion output of on-site electromagnetic field strength data. This helps to obtain the spectrum characteristics of electromagnetic signals in a timely manner, which is convenient for analysis and processing.

[0041] Signal capture and storage: The signal capture submodule receives the on-site electromagnetic field strength data and stores it in the high-speed transmission storage submodule to facilitate subsequent data processing and analysis. This helps to retain the original data for more in-depth research and comparison.

[0042] Digital fluorescent display: The digital fluorescent display submodule rasterizes the frequency domain waveform output by the on-site electromagnetic field strength data, outputs the frequency signal and displays it on the display screen through superposition accumulation, bitmap database update, color coding and curve mapping. This provides an intuitive visualization effect, allowing operators to more intuitively understand the characteristics and changes of electromagnetic signals.

[0043] Improve analysis efficiency: Through real-time spectrum analysis and digital fluorescence display, operators can quickly obtain spectrum information of electromagnetic signals, which improves analysis efficiency. This helps to find problems in time and take corresponding measures.

[0044] Enhanced data reliability: Signal capture and storage functions ensure data integrity and reliability, avoiding data loss or corruption. This is of great significance for subsequent data analysis and decision-making.

[0045] Easy fault diagnosis: Intuitive spectrum display and frequency signal output facilitate rapid diagnosis of electromagnetic interference problems, help technicians locate the source of the fault, and improve system reliability and stability.

[0046] Adaptable to various application scenarios: The electromagnetic field strength analysis module has multiple functional sub-modules, which can adapt to different electromagnetic environments and application requirements and has wide applicability.

[0047] Furthermore, the signal reconstruction test subsystem includes a signal reconstruction module, an interference signal application module and a monitoring correction module;

[0048] The signal reconstruction test subsystem reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters to obtain an on-site electromagnetic interference field strength signal, including:

[0049] The signal reconstruction module filters and reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters to obtain reconstructed on-site electromagnetic field strength data;

[0050] The reconstructed on-site electromagnetic field strength data is amplified by the interference signal applying module to obtain amplified on-site electromagnetic field strength data;

[0051] The amplified on-site electromagnetic field strength data is corrected by the monitoring correction module to obtain the on-site electromagnetic interference field strength signal.

[0052] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0053] Improve the accuracy of signal reconstruction: By filtering and reconstructing the on-site electromagnetic field strength data, design parameters and external area parameters through the signal reconstruction module, the on-site electromagnetic interference field strength signal can be restored more accurately.

[0054] Ensure the reliability of test results: The monitoring correction module corrects the amplified on-site electromagnetic field strength data, further improving the accuracy and reliability of the test results.

[0055] Provide a basis for electromagnetic compatibility design: The reconstructed on-site electromagnetic interference field strength signal can provide an important basis for the electromagnetic compatibility design of the high-speed railway system, which helps to optimize the system design and reduce the impact of electromagnetic interference.

[0056] Improve the system's anti-interference ability: By analyzing and evaluating the on-site electromagnetic interference field strength signal, corresponding measures can be taken to improve the system's anti-interference ability and ensure the normal operation of the system.

[0057] Facilitates fault diagnosis and location: Reconstruction of on-site electromagnetic interference field strength signals can help technicians diagnose and locate electromagnetic interference problems more accurately and improve troubleshooting efficiency.

[0058] Optimizing electromagnetic environment monitoring: The signal reconstruction test subsystem can provide more accurate data for electromagnetic environment monitoring, which helps to optimize the monitoring plan and improve the monitoring effect.

[0059] Further, the signal reconstruction module includes a high-speed digital-to-analog conversion submodule and a reconstruction filter submodule;

[0060] The filtering and reconstructing of the on-site electromagnetic field strength data, the design parameters and the external area parameters by the signal reconstruction module to obtain the reconstructed on-site electromagnetic field strength data includes:

[0061] The on-site electromagnetic field strength data, the design parameters and the external area parameters are imported into the input end of the signal reconstruction module, the on-site electromagnetic field strength data, the design parameters and the external area parameters are modulated by the digital composite modulator and the digitally controlled oscillator of the signal reconstruction module, and the conversion is completed in the high-speed digital-to-analog conversion submodule in combination with multi-rate digital interpolation, and the amplitude and phase distortion caused by the frequency response of the converted on-site electromagnetic field strength data, design parameters and external area parameters are compensated by the reconstruction filter submodule at the output end of the signal reconstruction module to obtain reconstructed on-site electromagnetic field strength data.

[0062] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0063] Improve data conversion accuracy: The high-speed digital-to-analog conversion submodule combined with multi-rate digital interpolation technology can more accurately convert on-site electromagnetic field strength data, design parameters and external area parameters from digital signals to analog signals, reducing conversion errors.

[0064] Compensation for frequency response distortion: The reconstruction filter submodule compensates the converted signal, which can effectively correct the amplitude and phase distortion caused by the frequency response and improve the accuracy of the reconstructed on-site electromagnetic field strength data.

[0065] Enhance the adaptability of signal reconstruction: By modulating the input parameters through a digital composite modulator and a digitally controlled oscillator, the signal reconstruction module can adapt to different signal characteristics and frequency requirements, thereby improving the versatility of the system.

[0066] Improve system performance: Accurate signal reconstruction helps improve the performance of the entire system, such as improving the accuracy of electromagnetic compatibility analysis and optimizing system design.

[0067] Provide reliable data for subsequent analysis: The reconstructed on-site electromagnetic field strength data is closer to the actual situation, providing a more reliable basis for subsequent electromagnetic interference analysis, fault diagnosis, etc.

[0068] Further, the reconstructed on-site electromagnetic field strength data is amplified by the interference signal applying module to obtain amplified on-site electromagnetic field strength data, including:

[0069] If the electromagnetic sensitive device is located at the trackside, the reconstructed on-site electromagnetic field strength data is amplified according to preset requirements by the power amplification component of the interference signal application module to obtain amplified on-site electromagnetic field strength data;

[0070] The amplified on-site electromagnetic field strength data is transmitted to the transmitting component of the interference signal applying module through the transmission component of the interference signal applying module, and the transmitting component is a transmitting antenna;

[0071] The amplified on-site electromagnetic field strength data is sent to the monitoring correction module through the transmitting component;

[0072] If the electromagnetic sensitive device is located at a non-trackside position, the processed on-site electromagnetic field strength data is amplified by the power amplification component according to preset requirements to obtain the amplified on-site electromagnetic field strength data;

[0073] The amplified on-site electromagnetic field strength data is transmitted to the inductive emission component of the interference signal application module through the transmission component, and the inductive emission component uses a coupling injection clamp to inject the amplified on-site electromagnetic field strength data into the equivalent loop antenna;

[0074] The amplified on-site electromagnetic field strength data is sent to the monitoring and correction module through the induction emission component.

[0075] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0076] Adapt to electromagnetic sensitive devices in different locations: According to the location of electromagnetic sensitive devices (trackside or non-trackside), different methods are used to apply interference signals, ensuring effective testing of devices in different locations.

[0077] Accurately amplify interference signals: The power amplifier component can amplify the reconstructed on-site electromagnetic field strength data according to preset requirements to ensure that the intensity of the interference signal meets the test requirements.

[0078] Efficient transmission of interference signals: The transmission component accurately transmits the amplified on-site electromagnetic field strength data to the transmitting component or the inductive transmitting component, reducing signal loss.

[0079] Simulate real interference environment: Send interference signals to the monitoring and correction module through transmitting components or inductive transmitting components, which can more realistically simulate the impact of electromagnetic interference on the equipment.

[0080] Improve test accuracy: Accurate interference signal application helps improve the accuracy of electromagnetic compatibility testing and ensure the reliability of equipment in actual working environments.

[0081] Facilitates fault diagnosis and optimization: By testing equipment in different locations, we can gain a more comprehensive understanding of the electromagnetic compatibility of the system, facilitate diagnosis of potential problems and optimization.

[0082] Reduce system risks: Discover and solve electromagnetic interference problems in advance, reduce the risk of system failure in actual operation, and improve system stability and safety.

[0083] Save test costs: Select the appropriate interference signal application method according to the device location to avoid unnecessary waste of test equipment and resources and reduce test costs.

[0084] Promoting the development of electromagnetic compatibility technology: It provides practical experience and data support for the research and development of electromagnetic compatibility technology, and promotes the continuous advancement of related technologies.

[0085] Further, the monitoring and correction module includes a monitoring and correction submodule, a receiving component and a feedback transmission component;

[0086] The amplified on-site electromagnetic field strength data is corrected by the monitoring correction module to obtain the on-site electromagnetic interference field strength signal, including:

[0087] receiving the amplified on-site electromagnetic field strength data through the receiving component;

[0088] The amplified on-site electromagnetic field strength data is sent to the power divider of the monitoring and correction submodule, and the amplified on-site electromagnetic field strength data is digitized and corrected through high-speed sampling by the monitor of the monitoring and correction submodule, and the on-site electromagnetic interference field strength signal is output by performing calculations through digital down-conversion and a combination of multiple Fourier transforms, and the on-site electromagnetic interference field strength signal is a real-time spectrum transformation;

[0089] The on-site electromagnetic interference field strength signal is compared and analyzed with the on-site electromagnetic field strength data by the corrector of the monitoring correction submodule, and each frequency component in the on-site electromagnetic interference field strength signal is corrected to obtain the on-site electromagnetic interference field strength signal.

[0090] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0091] Accurately correct the interference field strength signal: By monitoring the correction submodule to perform digital correction and multiple Fourier transform combination calculations on the amplified on-site electromagnetic field strength data, the on-site electromagnetic interference field strength signal can be obtained more accurately.

[0092] Real-time spectrum conversion: Real-time spectrum conversion enables technicians to observe and analyze the spectrum characteristics of electromagnetic interference in real time and discover potential problems in time.

[0093] Comparative analysis and correction: Compare and analyze the on-site electromagnetic interference field strength signal with the on-site electromagnetic field strength data, and correct each frequency component to improve the accuracy and reliability of the signal.

[0094] Improve system stability: Accurate correction helps reduce the impact of electromagnetic interference on the system and improve system stability and reliability.

[0095] Optimize system performance: Based on the corrected on-site electromagnetic interference field strength signal, the system can be optimized to improve system performance and anti-interference capabilities.

[0096] Facilitates fault diagnosis: Real-time spectrum conversion and precise correction help technicians diagnose electromagnetic interference faults more accurately and improve troubleshooting efficiency.

[0097] Promote technological development: The application of this advanced monitoring and correction technology provides practical experience and technical support for the technological development in the field of electromagnetic compatibility.

[0098] Furthermore, the design parameters include one or more of the train running speed, the number of pantographs raised for train operation to draw power, the opening direction of the pantograph, the material of the contact wire, the contact network tension and the dynamic contact pressure of the pantograph and the network; the external area parameters include one or more of the weather conditions, geological conditions and terrain conditions.

[0099] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0100] More accurate simulation of on-site electromagnetic interference: By considering design parameters such as train speed, number of pantographs and opening direction, as well as external area parameters such as weather, geology and topography, the on-site electromagnetic interference field strength signal can be reconstructed more realistically, thereby more accurately simulating the electromagnetic interference situation in the actual operating environment.

[0101] Improve the accuracy of electromagnetic compatibility testing: Accurate simulation of on-site electromagnetic interference helps improve the accuracy of electromagnetic compatibility testing of electromagnetic sensitive equipment and better evaluate the anti-interference ability of the equipment in the actual operating environment.

[0102] Optimize system design: Understanding the impact of different design parameters and external area parameters on electromagnetic interference can provide a basis for the optimal design of high-speed railway systems and reduce the generation of electromagnetic interference.

[0103] Improve test efficiency: Compared with a single immunity test, this method that comprehensively considers multiple parameters can more comprehensively evaluate the electromagnetic compatibility of the equipment, reduce the number of tests, and improve test efficiency.

[0104] Adapting to complex electromagnetic environments: With the development of high-speed railway systems, the electromagnetic environment has become increasingly complex. This method can adapt to this change and better evaluate the performance of equipment in complex electromagnetic environments.

[0105] Ensure the safety and reliability of equipment operation: Accurate electromagnetic compatibility testing can detect problems that may occur in equipment under electromagnetic interference in advance, and take corresponding measures to ensure the safety and reliability of equipment operation.

[0106] Reduce the risk of system failure: Through optimized design and accurate testing, the risk of equipment failure due to electromagnetic interference is reduced and the overall stability of the system is improved.

[0107] Furthermore, if the electromagnetic sensitive device cannot operate normally based on the on-site electromagnetic interference field strength signal, the method further includes:

[0108] Based on the design parameters and the external area parameters, determining the variation of the on-site electromagnetic field strength data in different areas;

[0109] Obtaining anti-interference parameters of the electromagnetic sensitive device;

[0110] Determine the area suitable for installing the electromagnetic sensitive device according to the variation of the on-site electromagnetic field strength data in different areas and the anti-interference parameters of the electromagnetic sensitive device;

[0111] The installation location of the electromagnetic sensitive device is adjusted based on the domain range.

[0112] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0113] Improve equipment operation stability: By determining the area suitable for installing electromagnetic sensitive equipment and adjusting the equipment installation location based on the area, the impact of electromagnetic interference on the equipment can be reduced and the stability of equipment operation can be improved.

[0114] Enhanced system reliability: Optimizing the installation location of electromagnetically sensitive equipment can help reduce the risk of equipment failure and enhance the reliability of high-speed railway systems.

[0115] Improve electromagnetic compatibility performance: Selecting the installation area based on on-site electromagnetic field strength data and equipment anti-interference parameters can better meet electromagnetic compatibility requirements and improve the overall electromagnetic compatibility performance of the system.

[0116] Adapting to complex electromagnetic environments: With the development of high-speed railway systems, the electromagnetic environment has become increasingly complex. This method can adapt to this change and better ensure the normal operation of equipment in complex electromagnetic environments.

[0117] Improve operational efficiency: Reducing equipment failures and maintenance time will help improve the operational efficiency of high-speed railways.

[0118] Reduce maintenance costs: Optimizing the equipment installation location can reduce the equipment maintenance cost and extend the service life of the equipment.

[0119] One or more embodiments of this specification provide a device for recording and simulating the electromagnetic environment of the space beside the high-speed railway track. The high-speed railway system includes: a field acquisition test subsystem and a signal reconstruction test subsystem; the device includes:

[0120] An on-site electromagnetic field strength data acquisition unit, which acquires on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system through the on-site acquisition test subsystem;

[0121] A parameter acquisition unit, which acquires relevant design parameters of the high-speed railway system and external area parameters of the simulated location;

[0122] A reconstruction unit, which reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters through the signal reconstruction test subsystem to obtain an on-site electromagnetic interference field strength signal;

[0123] The operation simulation unit inputs the on-site electromagnetic interference field strength signal into the electromagnetic sensitive device, so that the electromagnetic sensitive device performs an operation simulation, thereby obtaining whether the electromagnetic sensitive device operates normally based on the on-site electromagnetic interference field strength signal.

[0124] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:

[0125] Improve the accuracy of test results: Collecting on-site electromagnetic field strength data can truly reflect the actual electromagnetic interference situation and avoid the limitations of fixed interference signals. By reconstructing on-site data with design parameters and external area parameters, the obtained on-site electromagnetic interference field strength signal is closer to the actual situation, thereby improving the accuracy of test results.

[0126] Improve test efficiency: reconstruct the on-site electromagnetic field strength data, design parameters and external area parameters to obtain the on-site electromagnetic interference field strength signal, and test multiple electromagnetic sensitive devices at one time, avoiding the inefficient way of testing and inspecting each item separately. This can greatly improve the test efficiency and meet the needs of the rapid development of high-speed railway systems.

[0127] Discover problems in advance and take measures: By inputting the on-site electromagnetic interference field strength signal into the electromagnetic sensitive equipment for operation simulation, problems that may occur in the actual operation of the equipment can be discovered in advance. In this way, measures can be taken in time to improve and optimize, thereby improving the reliability and stability of the equipment.

[0128] Improve the safety and reliability of the system: Ensuring the normal operation of electromagnetic sensitive equipment in a complex electromagnetic environment helps improve the safety and reliability of the high-speed railway system. Reducing the impact of electromagnetic interference on equipment can reduce the probability of failure and ensure the normal operation of the train. BRIEF DESCRIPTION OF THE DRAWINGS

[0129] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0130] Figure 1 A flowchart of a method for recording and simulating the electromagnetic environment of a high-speed railway trackside space provided in one or more embodiments of this specification;

[0131] Figure 2 A schematic diagram of the structure of a high-speed railway trackside spatial electromagnetic environment recording and simulation system provided for one or more embodiments of this specification;

[0132] Figure 3 A schematic diagram of the structure of an electromagnetic radiation field strength test and analysis module provided for one or more embodiments of this specification;

[0133] Figure 4 A schematic diagram of the structure of a conversion correction module provided in one or more embodiments of this specification;

[0134] Figure 5 A schematic diagram of the structure of a signal reconstruction module provided in one or more embodiments of this specification;

[0135] Figure 6 A schematic diagram of the structure of a monitoring and correction module provided in one or more embodiments of this specification;

[0136] Figure 7 A schematic diagram of the structure of a device for recording and simulating the electromagnetic environment of the trackside space of a high-speed railway provided in one or more embodiments of this specification. DETAILED DESCRIPTION

[0137] The embodiments of this specification provide a method, device, equipment and medium for recording and simulating the electromagnetic environment of the trackside space of a high-speed railway.

[0138] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0139] Figure 1A flowchart of a method for recording and simulating the electromagnetic environment of a high-speed railway trackside space provided in one or more embodiments of this specification, the process can be executed by an electromagnetic sensitive device operation simulation system, the method is applied to a high-speed railway system, and the high-speed railway system includes: a field acquisition test subsystem and a signal reconstruction test subsystem. Certain input parameters or intermediate results in the process allow manual intervention and adjustment to help improve accuracy.

[0140] The method steps of the embodiment of this specification are as follows:

[0141] S102, collecting on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system through the on-site collection test subsystem.

[0142] In the embodiments of this specification, the above-mentioned collection of on-site electromagnetic field strength data can be implemented by the following specific implementation scheme:

[0143] Select a suitable sensor: For example, the acquisition test subsystem can be an interference field strength sensor, which can be selected according to the frequency band and intensity of the electromagnetic field to be measured.

[0144] Install sensors: Select suitable locations to install sensors near the electromagnetic interference sources of the high-speed railway system to ensure that the on-site electromagnetic field strength data can be accurately measured.

[0145] Set acquisition parameters: According to measurement requirements, set the sampling frequency, resolution and other parameters of the data acquisition test subsystem.

[0146] Conduct on-site data collection: When the high-speed railway system is in operation, start the on-site data collection test subsystem to begin collecting on-site electromagnetic field strength data.

[0147] S104, obtaining relevant design parameters of the high-speed railway system and external area parameters of the simulation location.

[0148] In the embodiments of this specification, the design parameters may include the train speed, the number of pantographs raised when the train is running to draw power, the direction of the pantograph opening, the material of the contact wire, the contact network tension and the dynamic contact pressure of the pantograph and the network; the external area parameters may include weather conditions, geological conditions and terrain conditions.

[0149] It should be noted that the above content can be implemented through the following specific implementation plans:

[0150] About obtaining design parameters:

[0151] Train running speed: The designed running speed of the train can be obtained from the railway operating department, train manufacturer or relevant technical documents; Number of pantographs and opening direction: Determine the number and opening direction of pantographs by referring to the technical specifications or design drawings of the train; Contact wire material: Understand the material information of the contact wire, which can usually be obtained from the railway construction or maintenance department; Contact network tension and dynamic contact pressure of the pantograph and the catenary: These parameters may need to be obtained from professional railway engineering research institutions or relevant technical literature.

[0152] About obtaining external area parameters:

[0153] Weather conditions: Historical weather data of the simulated location can be obtained from the meteorological department, including temperature, humidity, wind speed, rainfall, etc.; Geological conditions: Cooperate with geologists or relevant professional institutions to obtain geological information of the simulated location, such as soil type, rock structure, etc.; Topographic conditions: Use geographic information system (GIS) or other topographic mapping tools to obtain topographic data of the simulated location, including altitude, slope, terrain undulation, etc.

[0154] Data collation and analysis: The acquired design parameters and external area parameters are collated and classified to establish a parameter database. The parameters are analyzed to determine their impact on the performance of the high-speed railway system and to evaluate their changes under different conditions.

[0155] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0156] More accurate simulation of on-site electromagnetic interference: By considering design parameters such as train speed, number of pantographs and opening direction, as well as external area parameters such as weather, geology and topography, the on-site electromagnetic interference field strength signal can be reconstructed more realistically, thereby more accurately simulating the electromagnetic interference situation in the actual operating environment.

[0157] Improve the accuracy of electromagnetic compatibility testing: Accurate simulation of on-site electromagnetic interference helps improve the accuracy of electromagnetic compatibility testing of electromagnetic sensitive equipment and better evaluate the anti-interference ability of the equipment in the actual operating environment.

[0158] Optimize system design: Understanding the impact of different design parameters and external area parameters on electromagnetic interference can provide a basis for the optimal design of high-speed railway systems and reduce the generation of electromagnetic interference.

[0159] Improve test efficiency: Compared with a single immunity test, this method that comprehensively considers multiple parameters can more comprehensively evaluate the electromagnetic compatibility of the equipment, reduce the number of tests, and improve test efficiency.

[0160] Adapting to complex electromagnetic environments: With the development of high-speed railway systems, the electromagnetic environment has become increasingly complex. This method can adapt to this change and better evaluate the performance of equipment in complex electromagnetic environments.

[0161] Ensure the safety and reliability of equipment operation: Accurate electromagnetic compatibility testing can detect problems that may occur in equipment under electromagnetic interference in advance, and take corresponding measures to ensure the safety and reliability of equipment operation.

[0162] Reduce the risk of system failure: Through optimized design and accurate testing, the risk of equipment failure due to electromagnetic interference is reduced and the overall stability of the system is improved.

[0163] S106, reconstructing the on-site electromagnetic field strength data, the design parameters and the external area parameters through the signal reconstruction test subsystem to obtain an on-site electromagnetic interference field strength signal.

[0164] It should be noted that the above content can be implemented through the following specific implementation plans:

[0165] Data input: The electromagnetic field strength data collected on site, the design parameters of the high-speed railway system, and the external area parameters of the simulated location are input into the signal reconstruction test subsystem.

[0166] Signal preprocessing: Preprocess the input electromagnetic field strength data, such as removing noise, filtering, etc., to improve data quality. Analyze and organize the design parameters and external area parameters for subsequent use.

[0167] Signal reconstruction algorithm: Select an appropriate signal reconstruction algorithm, such as a model-based reconstruction algorithm or a data-driven reconstruction algorithm. According to the algorithm requirements, the preprocessed electromagnetic field strength data, design parameters and external area parameters are used as input to perform signal reconstruction calculations.

[0168] Result output: Output the reconstructed on-site electromagnetic interference field strength signal. The signal can be displayed in a graph, data table or other form for further analysis and processing.

[0169] Verification and evaluation: Verify and evaluate the reconstructed on-site electromagnetic interference field strength signal, such as comparing it with the actual measurement data, or using other evaluation indicators to evaluate the accuracy and reliability of the reconstruction results. According to the verification results, adjust and optimize the signal reconstruction test subsystem to improve the reconstruction performance.

[0170] S108, inputting the on-site electromagnetic interference field strength signal into the electromagnetic sensitive device, so that the electromagnetic sensitive device performs an operation simulation, thereby obtaining whether the electromagnetic sensitive device operates normally based on the on-site electromagnetic interference field strength signal.

[0171] Equipment preparation: Ensure that electromagnetic sensitive equipment is in normal working condition and connected to the appropriate power supply and signal source. Prepare input equipment for on-site electromagnetic interference field strength signals, such as a signal generator or sensor.

[0172] Signal input: Use appropriate connection methods to input the on-site electromagnetic interference field strength signal into the input terminal of the electromagnetic sensitive device. Ensure that parameters such as signal strength and frequency meet the requirements of the device.

[0173] Run simulation: Start the electromagnetic sensitive equipment and set its operation mode to simulate the actual working conditions. According to the equipment's operating manual or relevant specifications, make necessary settings and adjustments to ensure the accuracy of the simulation.

[0174] Monitoring and evaluation: During the operation simulation of electromagnetic sensitive equipment, closely monitor the operating status and output signals of the equipment. Use appropriate test instruments or software to measure and evaluate the performance indicators of the equipment, such as signal quality, noise level, functional integrity, etc.

[0175] Result analysis: Based on the monitoring and evaluation results, determine whether the electromagnetic sensitive equipment operates normally under the electromagnetic interference field strength signal on site. If the equipment operates normally, it means that it has a certain anti-interference ability to the interference; if the equipment is abnormal or fails, it is necessary to further analyze the cause and take corresponding measures to improve or repair it.

[0176] Repeated testing: In order to improve the reliability and accuracy of the test, multiple repeated tests can be performed and the results can be statistically analyzed. At the same time, it can be considered to test under different interference conditions to fully evaluate the anti-interference performance of the device.

[0177] Furthermore, if the electromagnetic sensitive device cannot operate normally based on the on-site electromagnetic interference field strength signal, the embodiments of the present specification can determine the change of the on-site electromagnetic field strength data in different areas based on the design parameters and the external area parameters; obtain the anti-interference parameters of the electromagnetic sensitive device; determine the area range suitable for installing the electromagnetic sensitive device based on the change of the on-site electromagnetic field strength data in different areas and the anti-interference parameters of the electromagnetic sensitive device; and adjust the installation position of the electromagnetic sensitive device based on the domain range.

[0178] It should be noted that the above content can be implemented through the following specific implementation plans:

[0179] Data collection and analysis: Collect on-site electromagnetic field strength data, design parameters, and external area parameters. Analyze the changes in electromagnetic field strength data in different areas, such as using data analysis tools or software to draw electromagnetic field strength distribution maps. Identify areas with strong or weak electromagnetic field strength.

[0180] Anti-interference parameter acquisition: Obtain the anti-interference parameters of electromagnetic sensitive equipment, which may include the anti-interference capability, operating frequency range, sensitivity, etc. These parameters can be obtained from the technical specifications of the equipment or by consulting with the equipment manufacturer.

[0181] Determine the area scope: Determine the area scope suitable for installing the equipment based on the changes in the electromagnetic field strength data and the anti-interference parameters of the electromagnetic sensitive equipment. Select areas with weak electromagnetic field strength and within the anti-interference capability of the equipment. You can use a geographic information system (GIS) or other mapping tools to mark these areas.

[0182] Adjust the installation location: Adjust the installation location of the electromagnetic sensitive device according to the determined area. Install the device in the selected area, making sure it is away from areas with strong electromagnetic fields. During the installation process, you need to follow the installation guide and safety regulations of the device.

[0183] Test and Verification: After adjusting the installation position, test and verify to ensure that the electromagnetic sensitive equipment can operate normally. Monitor the performance indicators of the equipment, such as signal quality, stability, etc. If necessary, further adjustments and optimizations can be made.

[0184] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0185] Improve equipment operation stability: By determining the area suitable for installing electromagnetic sensitive equipment and adjusting the equipment installation location based on the area, the impact of electromagnetic interference on the equipment can be reduced and the stability of equipment operation can be improved.

[0186] Enhanced system reliability: Optimizing the installation location of electromagnetically sensitive equipment can help reduce the risk of equipment failure and enhance the reliability of high-speed railway systems.

[0187] Improve electromagnetic compatibility performance: Selecting the installation area based on on-site electromagnetic field strength data and equipment anti-interference parameters can better meet electromagnetic compatibility requirements and improve the overall electromagnetic compatibility performance of the system.

[0188] Adapting to complex electromagnetic environments: With the development of high-speed railway systems, the electromagnetic environment has become increasingly complex. This method can adapt to this change and better ensure the normal operation of equipment in complex electromagnetic environments.

[0189] Improve operational efficiency: Reducing equipment failures and maintenance time will help improve the operational efficiency of high-speed railways.

[0190] Reduce maintenance costs: Optimizing the equipment installation location can reduce the equipment maintenance cost and extend the service life of the equipment.

[0191] Furthermore, the on-site acquisition and testing subsystem may include an acquisition and receiving module and an electromagnetic field strength analysis module; when the on-site acquisition and testing subsystem collects the on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system, the on-site electromagnetic emission data generated by the electromagnetic interference source of the high-speed railway system can be collected through the acquisition and receiving module based on a pre-set high-speed railway line structure; the on-site electromagnetic emission data can be processed through the electromagnetic field strength analysis module to obtain the on-site electromagnetic field strength data.

[0192] Among them, the pre-set high-speed railway line structure includes a first line structure for collecting the on-site electromagnetic emission data by fixing a designated sensor at a trackside position, and a second line structure for collecting the on-site electromagnetic emission data by installing the designated sensor on a drone. The first line structure includes a line structure that is convenient for installation at a trackside position, and the second line structure includes a line structure that is not convenient for installation at a trackside position.

[0193] It should be noted that the above content can be implemented through the following specific implementation plans:

[0194] Preparation: Determine the high-speed railway line section where electromagnetic field strength data needs to be collected. Select appropriate acquisition and receiving modules and electromagnetic field strength analysis modules, and ensure that their performance and accuracy meet the requirements.

[0195] Line structure selection: Determine whether to use the first line structure or the second line structure for data collection based on actual conditions. If the trackside location is convenient for installing sensors and the line structure is suitable, select the first line structure. If the trackside location is not convenient for installing sensors or the line structure is not suitable, select the second line structure. For example, the first line structure can be a general section trackside structure, and the second line structure can be an elevated bridge section trackside structure.

[0196] Sensor installation: For the first line structure, fix the sensor to the trackside. Ensure that the sensor is firmly installed, accurately positioned, and well connected to the acquisition and receiving module. For the second line structure, install the sensor on the drone. Ensure that the sensor is stably installed, the drone can fly on the designated line section, and wirelessly communicate with the acquisition and receiving module.

[0197] Data collection: Start the collection and receiving module to start collecting electromagnetic emission data on site. For the first line structure, the sensor directly collects electromagnetic emission data at the trackside position and transmits it to the collection and receiving module. For the second line structure, the drone carries the sensor and flies on the designated line section to collect electromagnetic emission data and transmit the data to the collection and receiving module through wireless communication.

[0198] Data processing: The acquisition receiving module transmits the received on-site electromagnetic emission data to the electromagnetic field strength analysis module. The electromagnetic field strength analysis module processes the data, including signal filtering, amplification, digitization and other operations. By analyzing the processed signals, the on-site electromagnetic field strength data is obtained.

[0199] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0200] Improve the accuracy of data collection: Through the pre-set high-speed railway line structure, the acquisition and receiving module can more specifically collect the on-site electromagnetic emission data generated by the electromagnetic interference source, reduce the interference of irrelevant data, and improve the accuracy of data collection.

[0201] Improve the efficiency of data analysis: The electromagnetic field strength analysis module can quickly process the collected on-site electromagnetic emission data to obtain on-site electromagnetic field strength data, thereby improving the efficiency of data analysis.

[0202] Provide reliable data support for subsequent electromagnetic compatibility certification tests: By collecting on-site electromagnetic field strength data, it provides reliable data support for subsequent electromagnetic compatibility certification tests, which helps to ensure the safety, reliability and stability of related equipment in the high-speed railway system during operation.

[0203] Furthermore, the field acquisition test subsystem also includes a conversion correction module; based on the location of the electromagnetic sensitive device, the field electromagnetic field strength data is converted by the conversion correction module to obtain corrected field electromagnetic field strength data.

[0204] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0205] Improve test accuracy: By converting the on-site electromagnetic field strength data through the conversion correction module, the actual electromagnetic field strength of the location of the electromagnetic sensitive equipment can be more accurately reflected, thereby improving the accuracy of the test.

[0206] Consider differences in device locations: Electromagnetic sensitive devices in different locations may be subject to different degrees of electromagnetic interference. Through conversion correction, adjustments can be made based on the specific location of the device to better evaluate the device's anti-interference ability in the actual environment.

[0207] Optimize system design: The corrected on-site electromagnetic field strength data can provide a more targeted reference for the design and optimization of high-speed railway systems. It helps to take more effective electromagnetic compatibility measures and reduce the impact of electromagnetic interference on the system.

[0208] Furthermore, the electromagnetic field strength analysis module includes a frequency conversion submodule, a real-time spectrum analysis submodule, a digital fluorescent display submodule, a signal capture submodule and a high-speed transmission storage submodule; when the electromagnetic field strength analysis module processes the on-site electromagnetic emission data to obtain the on-site electromagnetic field strength data, the signal input port of the frequency conversion submodule can be connected to the acquisition receiving module to convert the on-site electromagnetic emission data into a voltage signal, and the voltage signal is attenuated, frequency-selectively filtered and multi-order mixed to achieve the frequency change of the voltage signal; the voltage signal with frequency change is digitized and corrected through high-speed sampling by the real-time spectrum analysis submodule, and the on-site electromagnetic emission data is converted into a voltage signal by the signal input port of the frequency conversion submodule. The digital down-conversion and multiple Fourier transforms are combined to perform calculations and realize the output of the on-site electromagnetic field strength data, and the on-site electromagnetic field strength data is a real-time spectrum transformation; the input port of the signal capture submodule is connected to the signal output port of the real-time spectrum analysis submodule to receive the on-site electromagnetic field strength data, and the on-site electromagnetic field strength data is stored in the high-speed transmission storage submodule; the frequency domain waveform output by the on-site electromagnetic field strength data is rasterized by the digital fluorescent display submodule, and a frequency signal is output through superposition accumulation, bitmap database update, color coding and curve mapping, and the frequency signal is displayed on the display screen built into the digital fluorescent display submodule.

[0209] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0210] Realize signal frequency conversion: The frequency conversion submodule converts the on-site electromagnetic emission data into a voltage signal, and performs attenuation, frequency selection filtering and multi-order mixing to realize the frequency change of the voltage signal, providing a basis for subsequent spectrum analysis.

[0211] Real-time spectrum analysis: The real-time spectrum analysis submodule digitizes and corrects the frequency-changing voltage signal through high-speed sampling, performs calculations through digital down-conversion and a combination of multiple Fourier transforms, and realizes real-time spectrum conversion output of on-site electromagnetic field strength data. This helps to obtain the spectrum characteristics of electromagnetic signals in a timely manner, which is convenient for analysis and processing.

[0212] Signal capture and storage: The signal capture submodule receives the on-site electromagnetic field strength data and stores it in the high-speed transmission storage submodule to facilitate subsequent data processing and analysis. This helps to retain the original data for more in-depth research and comparison.

[0213] Digital fluorescent display: The digital fluorescent display submodule rasterizes the frequency domain waveform output by the on-site electromagnetic field strength data, outputs the frequency signal and displays it on the display screen through superposition accumulation, bitmap database update, color coding and curve mapping. This provides an intuitive visualization effect, allowing operators to more intuitively understand the characteristics and changes of electromagnetic signals.

[0214] Improve analysis efficiency: Through real-time spectrum analysis and digital fluorescence display, operators can quickly obtain spectrum information of electromagnetic signals, which improves analysis efficiency. This helps to find problems in time and take corresponding measures.

[0215] Enhanced data reliability: Signal capture and storage functions ensure data integrity and reliability, avoiding data loss or corruption. This is of great significance for subsequent data analysis and decision-making.

[0216] Easy fault diagnosis: Intuitive spectrum display and frequency signal output facilitate rapid diagnosis of electromagnetic interference problems, help technicians locate the source of the fault, and improve system reliability and stability.

[0217] Adaptable to various application scenarios: The electromagnetic field strength analysis module has multiple functional sub-modules, which can adapt to different electromagnetic environments and application requirements and has wide applicability.

[0218] Furthermore, the signal reconstruction test subsystem includes a signal reconstruction module, an interference signal application module and a monitoring correction module; when the on-site electromagnetic field strength data, the design parameters and the external area parameters are reconstructed by the signal reconstruction test subsystem to obtain an on-site electromagnetic interference field strength signal, the on-site electromagnetic field strength data, the design parameters and the external area parameters can be filtered and reconstructed by the signal reconstruction module to obtain reconstructed on-site electromagnetic field strength data; the reconstructed on-site electromagnetic field strength data is amplified by the interference signal application module to obtain amplified on-site electromagnetic field strength data; the amplified on-site electromagnetic field strength data is corrected by the monitoring correction module to obtain the on-site electromagnetic interference field strength signal.

[0219] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0220] Improve the accuracy of signal reconstruction: By filtering and reconstructing the on-site electromagnetic field strength data, design parameters and external area parameters through the signal reconstruction module, the on-site electromagnetic interference field strength signal can be restored more accurately.

[0221] Ensure the reliability of test results: The monitoring correction module corrects the amplified on-site electromagnetic field strength data, further improving the accuracy and reliability of the test results.

[0222] Provide a basis for electromagnetic compatibility design: The reconstructed on-site electromagnetic interference field strength signal can provide an important basis for the electromagnetic compatibility design of the high-speed railway system, which helps to optimize the system design and reduce the impact of electromagnetic interference.

[0223] Improve the system's anti-interference ability: By analyzing and evaluating the on-site electromagnetic interference field strength signal, corresponding measures can be taken to improve the system's anti-interference ability and ensure the normal operation of the system.

[0224] Facilitates fault diagnosis and location: Reconstruction of on-site electromagnetic interference field strength signals can help technicians diagnose and locate electromagnetic interference problems more accurately and improve troubleshooting efficiency.

[0225] Optimizing electromagnetic environment monitoring: The signal reconstruction test subsystem can provide more accurate data for electromagnetic environment monitoring, which helps to optimize the monitoring plan and improve the monitoring effect.

[0226] Furthermore, the signal reconstruction module includes a high-speed digital-to-analog conversion submodule and a reconstruction filter submodule; when the on-site electromagnetic field strength data, the design parameters and the external area parameters are filtered and reconstructed by the signal reconstruction module to obtain the reconstructed on-site electromagnetic field strength data, the on-site electromagnetic field strength data, the design parameters and the external area parameters can be imported into the input end of the signal reconstruction module, and the on-site electromagnetic field strength data, the design parameters and the external area parameters are modulated by the digital composite modulator and the digitally controlled oscillator of the signal reconstruction module, and the conversion is completed in the high-speed digital-to-analog conversion submodule in combination with multi-rate digital interpolation, and the amplitude and phase distortion caused by the frequency response of the converted on-site electromagnetic field strength data, design parameters and external area parameters are compensated by the reconstruction filter submodule at the output end of the signal reconstruction module to obtain the reconstructed on-site electromagnetic field strength data.

[0227] It should be noted that the above content can be implemented through the following specific implementation plans:

[0228] System setup: Build a signal reconstruction module, including a high-speed digital-to-analog conversion submodule and a reconstruction filter submodule. Connect the on-site electromagnetic field strength data, design parameters, and external area parameters to the input of the signal reconstruction module.

[0229] Digital composite modulation and digitally controlled oscillator: In the signal reconstruction module, digital composite modulators and digitally controlled oscillators are used to modulate the input field electromagnetic field strength data, design parameters, and external area parameters. Ensure that the modulation parameters are set correctly to meet the specific reconstruction requirements.

[0230] Multi-rate digital interpolation and high-speed digital-to-analog conversion: Use multi-rate digital interpolation technology to convert the modulated signal in the high-speed digital-to-analog conversion submodule. Ensure that the performance and accuracy of the high-speed digital-to-analog conversion submodule meet the requirements to achieve accurate signal conversion.

[0231] Reconstruction filtering: At the output of the signal reconstruction module, the converted field electromagnetic field strength data, design parameters and external area parameters are filtered using the reconstruction filter submodule. The parameters of the reconstruction filter submodule are adjusted to compensate for the amplitude and phase distortion caused by the frequency response.

[0232] Data output: Obtain the reconstructed electromagnetic field strength data after filtering and reconstruction. Output the reconstructed electromagnetic field strength data to the subsequent processing or analysis system.

[0233] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0234] Improve data conversion accuracy: The high-speed digital-to-analog conversion submodule combined with multi-rate digital interpolation technology can more accurately convert on-site electromagnetic field strength data, design parameters and external area parameters from digital signals to analog signals, reducing conversion errors.

[0235] Compensation for frequency response distortion: The reconstruction filter submodule compensates the converted signal, which can effectively correct the amplitude and phase distortion caused by the frequency response and improve the accuracy of the reconstructed on-site electromagnetic field strength data.

[0236] Enhance the adaptability of signal reconstruction: By modulating the input parameters through a digital composite modulator and a digitally controlled oscillator, the signal reconstruction module can adapt to different signal characteristics and frequency requirements, thereby improving the versatility of the system.

[0237] Improve system performance: Accurate signal reconstruction helps improve the performance of the entire system, such as improving the accuracy of electromagnetic compatibility analysis and optimizing system design.

[0238] Provide reliable data for subsequent analysis: The reconstructed on-site electromagnetic field strength data is closer to the actual situation, providing a more reliable basis for subsequent electromagnetic interference analysis, fault diagnosis, etc.

[0239] Further, when the reconstructed on-site electromagnetic field strength data is amplified by the interference signal application module to obtain the amplified on-site electromagnetic field strength data, if the electromagnetic sensitive device is located at the trackside position, the reconstructed on-site electromagnetic field strength data is amplified according to preset requirements by the power amplification component of the interference signal application module to obtain the amplified on-site electromagnetic field strength data; the amplified on-site electromagnetic field strength data is transmitted to the transmitting component of the interference signal application module by the transmission component of the interference signal application module, and the transmitting component is a transmitting antenna; the amplified on-site electromagnetic field strength data is sent to the monitoring and correction module by the transmitting component; if the electromagnetic sensitive device is located at a non-trackside position, the processed on-site electromagnetic field strength data is amplified according to preset requirements by the power amplification component to obtain the amplified on-site electromagnetic field strength data; the amplified on-site electromagnetic field strength data is transmitted to the induction transmitting component of the interference signal application module by the transmission component, and the induction transmitting component uses a coupling injection clamp to inject the amplified on-site electromagnetic field strength data into the equivalent ring antenna; the amplified on-site electromagnetic field strength data is sent to the monitoring and correction module by the induction transmitting component.

[0240] It should be noted that the embodiments of this specification have the following beneficial effects through the above contents:

[0241] Adapt to electromagnetic sensitive devices in different locations: According to the location of electromagnetic sensitive devices (trackside or non-trackside), different methods are used to apply interference signals, ensuring effective testing of devices in different locations.

[0242] Accurately amplify interference signals: The power amplifier component can amplify the reconstructed on-site electromagnetic field strength data according to preset requirements to ensure that the intensity of the interference signal meets the test requirements.

[0243] Efficient transmission of interference signals: The transmission component accurately transmits the amplified on-site electromagnetic field strength data to the transmitting component or the inductive transmitting component, reducing signal loss.

[0244] Simulate real interference environment: Send interference signals to the monitoring and correction module through transmitting components or inductive transmitting components, which can more realistically simulate the impact of electromagnetic interference on the equipment.

[0245] Improve test accuracy: Accurate interference signal application helps improve the accuracy of electromagnetic compatibility testing and ensure the reliability of equipment in actual working environments.

[0246] Facilitates fault diagnosis and optimization: By testing equipment in different locations, we can gain a more comprehensive understanding of the electromagnetic compatibility of the system, facilitate diagnosis of potential problems and optimization.

[0247] Reduce system risks: Discover and solve electromagnetic interference problems in advance, reduce the risk of system failure in actual operation, and improve system stability and safety.

[0248] Save test costs: Select the appropriate interference signal application method according to the device location to avoid unnecessary waste of test equipment and resources and reduce test costs.

[0249] Promoting the development of electromagnetic compatibility technology: It provides practical experience and data support for the research and development of electromagnetic compatibility technology, and promotes the continuous advancement of related technologies.

[0250] Furthermore, the monitoring and correction module includes a monitoring and correction submodule, a receiving component and a feedback transmission component; when the amplified on-site electromagnetic field strength data is corrected by the monitoring and correction module to obtain the on-site electromagnetic interference field strength signal, the amplified on-site electromagnetic field strength data can be received by the receiving component; the amplified on-site electromagnetic field strength data is sent to the power divider of the monitoring and correction submodule, and the amplified on-site electromagnetic field strength data is digitized and corrected through high-speed sampling by the monitor of the monitoring and correction submodule, and the calculation is performed and the on-site electromagnetic interference field strength signal output is realized through digital down-conversion and a combination of multiple Fourier transforms, and the on-site electromagnetic interference field strength signal is a real-time spectrum conversion; the on-site electromagnetic interference field strength signal is compared and analyzed with the on-site electromagnetic field strength data by the corrector of the monitoring and correction submodule, and each frequency component in the on-site electromagnetic interference field strength signal is corrected to obtain the on-site electromagnetic interference field strength signal.

[0251] It should be noted that high-speed railways use electric traction EMUs for operation, and the trains use 25KV AC electric traction power supply systems. The operation of high-power traction equipment and current-taking units used in the traction power supply system during train operation, the contact and sliding of the train bow-net system, and the spark discharge caused by the bow-net offline will all generate electromagnetic interference to the outside, which will have an electromagnetic impact on the high-speed railway train onboard and trackside signal system equipment. With the increase in the operating speed of high-speed railways and the continuous updating of EMU models, the train traction power has further increased, resulting in the electromagnetic environment of the high-speed railway system train onboard and trackside signal system equipment (i.e. electromagnetic sensitive equipment) becoming more and more complex. In the future, railway signal equipment will also develop towards informatization, integration, and miniaturization. The electromagnetic sensitivity of the equipment will continue to increase, and the means of electromagnetic environment monitoring in the trackside space of the high-speed railway system used in complex electromagnetic environments also need to be improved and optimized. At this stage, in order to meet the safety, reliability, and stability in use, railway signal equipment must pass the electromagnetic compatibility certification test and can only be used after meeting the certification requirements. However, in the process of electromagnetic compatibility certification of railway signal equipment, the standards for single immunity tests in electromagnetic compatibility certification tests are all fixed interference signals formed by comprehensive consideration of multiple factors, and the test is carried out item by item during the test; in the actual operating line field environment, the working environment of on-board and trackside signal equipment is often a complex electromagnetic environment formed by the superposition of multiple interference signals, which is significantly different from the test environment specified by laboratory standards. Although railway signal equipment meets the requirements of laboratory testing, there are still situations in field applications where the normal work is affected by the electromagnetic interference generated in the system, which poses a safety risk and affects the railway driving efficiency and operational safety.

[0252] In the field of maglev rail transit, existing data show that relevant institutions have proposed prediction and measurement plans for the electromagnetic radiation emissions of maglev systems. In the field of general technology, for the new energy vehicle industry, some institutions have proposed systems and methods for evaluating and improving the effectiveness of laboratory electromagnetic environment reproduction, which involves collecting road electromagnetic environment signals and reproducing them in the laboratory through compensation and other means.

[0253] Due to the following reasons, existing similar technical solutions cannot be well adapted to the high-speed rail system and have very low feasibility in the high-speed rail system.

[0254] (1) The solutions in the field of maglev basically focus on the characteristics of the maglev system and are based on the principles and characteristics of the electromagnetic emission of the maglev system. However, there are significant differences between the maglev system and the high-speed railway system in terms of power supply, traction drive, line structure, etc., and the electromagnetic interference sources are quite different. This technical solution focuses on predicting the electromagnetic emission of the maglev system, and is not used to simulate and reproduce a specific complex electromagnetic environment.

[0255] (2) The starting point of the solution in the field of new energy vehicles is to target new energy vehicles and road traffic. The strength and characteristics of their electromagnetic emission and electromagnetic interference sources are significantly different from those of the high-speed railway system. Its measurement solution does not match the electromagnetic emission and electromagnetic interference generated by the high-speed railway system in the time and frequency domain.

[0256] (3) The running speed of trains in high-speed railway systems reaches 350 km / h and above. Compared with road traffic, the electromagnetic emission and electromagnetic interference signals generated by the system are difficult to fully capture and measure using the on-site measurement method proposed in this scheme.

[0257] (4) The technical solutions in the field of new energy vehicles are limited to the compensation of antenna factors and transmission cable losses for the correction measures of field data collected on site. There is no consideration of the differences in the locations of electromagnetic sensitive facilities along the track of the high-speed railway system, nor the conversion and conversion methods related to the change of field strength with distance. The technical solution uses a vector signal generator as a technical means to reproduce the laboratory electromagnetic environment. This method may cause problems such as imbalance of orthogonal signal data streams or carrier leakage, as well as amplitude and phase distortion. A more optimized implementation method needs to be considered. The technical solution only provides a signal generation and transmission scheme. Given the diversity of electromagnetic sensitive facilities along the track of the high-speed railway system, it cannot meet the needs of applying electromagnetic interference signals to different sensitive devices. A variety of different implementation schemes need to be considered.

[0258] (5) The technical solutions in the field of new energy vehicles tend to be a compensation method for existing experimental parameters, while the signal equipment of the high-speed railway system requires a new testing technology and method that is suitable for the high-speed railway application environment.

[0259] A high-speed railway trackside space electromagnetic environment recording and simulation system consists of a field acquisition test subsystem and a signal reconstruction test subsystem. Figure 2 The schematic diagram of the structure of the electromagnetic environment recording and simulation system for the trackside space of the high-speed railway is shown. The field acquisition test subsystem includes an acquisition receiving module, an electromagnetic radiation field strength test and analysis system / module (the same as the electromagnetic field strength analysis module mentioned above, the same as the electromagnetic radiation field strength test and analysis module described below), a conversion correction module and a power supply module; the signal reconstruction test subsystem includes a signal reconstruction module, a signal generation system / module (the same as the interference signal application module mentioned above) and a monitoring correction module.

[0260] (1) On-site acquisition and testing subsystem

[0261] The field acquisition test subsystem is mainly used to measure and collect the electromagnetic emissions generated by the electromagnetic interference sources of the on-site railway system (such as the train pantograph system, train traction system, etc.) along the railway system, and save the on-site field strength measurement data through the recording device. The field acquisition test subsystem consists of the following modules:

[0262] ①Acquisition receiving module

[0263] The acquisition and receiving module is mainly used for measuring and collecting the electromagnetic emission field strength generated by the electromagnetic interference source of the on-site railway system. According to the different structural characteristics of the high-speed railway system line, the module includes the following types:

[0264] i) For trackside locations in general sections of high-speed railway systems:

[0265] The acquisition and receiving module consists of an interference field strength sensor and a transmission component; the interference field strength sensor is a sensor that is customized to meet the test performance and requirements based on the structure and design layout characteristics of the high-speed railway line itself and the external environment of the line, and can be fixedly installed on the trackside of the line; the field strength sensor unit includes a customized antenna for receiving field strength, etc., which can cover different frequency ranges according to the frequency characteristics of the receiving antenna. The sensor or antenna is connected to the signal input port of the electromagnetic radiation field strength test and analysis module through a transmission component (coaxial cable), and the captured interference field strength or interference signal is converted into a level signal and sent to the electromagnetic radiation field strength test and analysis module.

[0266] ii) For trackside locations of bridge sections of high-speed railway lines:

[0267] For elevated bridge structures, the acquisition and receiving module consists of a UAV interference field strength test acquisition unit and a transmission module;

[0268] By mounting a field strength meter or antenna on a drone to form a drone interference field strength test collection unit, the drone is launched into the air and flies to a designated location in the air according to the set trajectory and waypoints to measure the electromagnetic field in the trackside space of the elevated bridge line structure. The monitoring data and location information are wirelessly transmitted to the ground receiving station in real time through the transmission module. The ground station can store the data in real time and transmit the monitoring point and field strength test data to the electromagnetic radiation field strength test analysis module through the transmission module. The transmission module is composed of network routing equipment, including network switches and wireless routers, which are responsible for data exchange and routing between devices, and realize wired and wireless data transmission functions.

[0269] ②Electromagnetic radiation field strength test and analysis module

[0270] Figure 3 This is a structural diagram of the electromagnetic radiation field strength test and analysis module, which consists of a frequency conversion submodule, a real-time spectrum analysis submodule, a digital fluorescent display submodule, a signal capture submodule, and a high-speed transmission and storage submodule; it can realize high-speed, non-omission test collection of electromagnetic interference field strength and real-time analysis of interference field strength signals.

[0271] The signal input port of the frequency conversion submodule is connected to the sensor or antenna of the receiving module, and the collected electromagnetic radiation field strength is converted into a voltage signal. The frequency conversion submodule is used to attenuate, select frequency filtering and multi-order mixing the voltage signal to achieve frequency change; the real-time spectrum analysis submodule digitizes and corrects the signal through high-speed sampling, performs calculations and realizes real-time spectrum output through digital down conversion (DDC) and a combination of multiple Fourier transforms; the signal capture submodule and the high-speed transmission storage submodule are mainly composed of a high sampling rate, large storage depth acquisition and recording unit and a disk array, and its signal input port is connected to the signal output port of the real-time spectrum analysis submodule. The input signal is the in-phase (I) and orthogonal (Q) baseband signal stream converted and output by the real-time spectrum analysis submodule, and the signal is recorded and stored in the high-speed transmission storage submodule by the signal capture submodule.

[0272] The frequency domain waveform output by the continuous real-time spectrum transformation can be rasterized through the digital fluorescent display submodule, and the frequency signal can be output and displayed on the module's built-in display screen through superposition accumulation, bitmap database update, color coding and curve mapping. It is presented as a time domain waveform of the interference signal after being processed by the real-time spectrum analysis submodule, and contains all frequency component information of the interference signal within the real-time bandwidth frequency band.

[0273] ③Conversion correction module

[0274] For specific sections of high-speed railway lines, sensors cannot be installed at trackside locations (such as tunnel structures, etc.), or sensitive equipment is not at trackside locations. Interference field strength sensors are set at a fixed distance from the trackside. The signal capture module (i.e., the signal capture submodule mentioned above) processes the captured interference field strength or interference signal through the sensor or antenna through the conversion correction module, and converts it into a corrected signal and sends it to the electromagnetic radiation field strength test and analysis module via the transmission component (coaxial cable). The conversion correction module has a built-in high-speed railway system electromagnetic radiation field strength lateral distance attenuation characteristic curve and a standard distance field strength conversion algorithm in advance. The interference field strength signal measured and collected by the sensor unit set at a fixed distance from the trackside can be calculated to obtain the field strength result at the trackside or a specific distance. In addition, the conversion correction module is also responsible for correcting the errors introduced by each module of the field acquisition test subsystem during the measurement process, including the feeder loss introduced by the acquisition receiving module, transmission component, etc., and correcting the external test environment and the difference parameters of the internal sensor. Figure 4 It is a structural diagram of the conversion correction module, including distance conversion, environmental error conversion and loss conversion.

[0275] ④Power module

[0276] The power module mainly powers the sensors or antennas in the acquisition and receiving module, as well as the electromagnetic radiation field strength test and analysis module. It does not rely on an external power supply, but is independently powered. It is composed of a battery pack connected in parallel, outputs 12V DC, and is equipped with an inverter device that uses filtering to provide power supply for devices with different power supply requirements. It also ensures that it does not affect the performance of the test system, and can provide AC 220V, DC 5V, and 12V power outputs at the same time.

[0277] (2) Signal reconstruction (simulation) test subsystem

[0278] The signal reconstruction (simulation) test subsystem is mainly used to reconstruct the on-site electromagnetic interference field strength data collected and stored by the on-site acquisition test subsystem, and generate an electromagnetic interference field strength signal that is basically consistent with the on-site environmental data. The signal reconstruction (simulation) test subsystem consists of the following modules:

[0279] ①Signal reconstruction module

[0280] The signal reconstruction module is mainly composed of a high-speed digital-to-analog conversion submodule and a reconstruction filter submodule, which can import, analyze and reconstruct the field strength interference signal stored and recorded by the field acquisition test subsystem. Figure 5 A schematic diagram of the structure of the signal reconstruction module is shown.

[0281] The data collected on-site and stored in the form of in-phase (I) and quadrature (Q) baseband signal streams are imported into the input of the signal reconstruction module, and the modulation and carrier signals are realized through the digital composite modulator and the digitally controlled oscillator, and the conversion is completed in the high-speed digital-to-analog conversion submodule in combination with multi-rate digital interpolation. At the output end, the amplitude and phase distortion caused by the frequency response are compensated by the reconstruction filter submodule, thereby realizing seamless conversion and reconstruction of the stored signals collected on-site.

[0282] In addition, the module can also use an external mixer and a fixed-frequency local oscillator to achieve the extended function of multi-channel signal synchronization.

[0283] ②Interference signal application module

[0284] In view of the different characteristics of sensitive equipment on site in the railway system, the following solutions can be adopted to apply / transmit interference signals.

[0285] i) Direct method

[0286] The interference signal generation system / module using the direct method is composed of a power amplifier component, a transmission component and a transmitting component. The output signal of the signal reconstruction module is amplified according to the demand through the power amplifier component, and transmitted to the transmitting end through the feeder and other transmission components, and the transmitting antenna is used to convert the signal into a field and transmit it outward.

[0287] The direct method signal generation system / module is mainly aimed at electromagnetic sensitive equipment installed and used at the trackside.

[0288] ii) Indirect method

[0289] The interference signal application module using the indirect method is composed of a power amplifier component, a transmission component and an inductive emission component. The output signal of the signal reconstruction module is also amplified according to the demand through the power amplifier component, and transmitted to the inductive emission end through the feeder and other transmission components. The inductive emission component uses a coupling injection clamp to inject the signal into the equivalent loop antenna, and the antenna converts the signal into an inductive field through inductive coupling and emits it outward.

[0290] The indirect interference signal application module is mainly used for electromagnetic sensitive devices outside the line and at non-trackside locations, as well as larger electromagnetic sensitive devices.

[0291] ③Monitoring and correction module

[0292] Figure 6 This is a structural diagram of the monitoring and correction module, which consists of a monitoring and correction submodule, a receiving component, and a feedback transmission component, and realizes the function of receiving, monitoring and correcting the field strength signal sent out by the signal generation system / module. Corresponding to the composition scheme of the signal generation system / module, the monitoring and correction module can adopt the following scheme.

[0293] The receiving component adopts a standard receiving antenna (loop antenna), and the field strength signal emitted by the receiving signal generation system / module is transmitted to the monitoring and correction submodule through the transmission component. The monitoring and correction submodule is composed of a power divider, a monitoring unit and a correction unit. The signal enters the monitoring unit (real-time spectrum analysis unit) through the power divider. This unit has the same structure as the electromagnetic radiation field strength test and analysis module, and can process, analyze and display the frequency domain and time domain information of the signal measured by the receiving component.

[0294] The correction unit compares and analyzes the signal collected by the receiving component with the electromagnetic interference field strength data stored and corrected by the on-site acquisition test subsystem, performs correction calculations on each frequency component of the signal, sends the correction information to the signal reconstruction module through the feedback transmission component, corrects the signal generated by the module, and then transmits it to the outside through the signal application module.

[0295] (1) The interference field strength sensor used in the collection and receiving module of the on-site collection test subsystem of this scheme is fully considered and studied based on the structure and design layout of the high-speed railway line itself, as well as the external environment of the line. Sensors that meet the test performance and requirements and can be fixedly installed at the trackside of the line are designed and customized respectively, and the UAV interference field strength test collection unit and transmission module for the elevated bridge structure are designed. For the trackside or at a specific distance, the lateral distance attenuation characteristic curve of the electromagnetic radiation field strength of the high-speed railway system and the standard distance field strength conversion algorithm can be pre-built in the conversion correction module of the subsystem. The interference field strength signal measured and collected by the sensor unit set at a fixed distance from the trackside can be calculated to obtain the field strength result. It can basically achieve full coverage of the electromagnetic environment of the trackside and specific locations of different line structures of the high-speed railway system.

[0296] (2) The electromagnetic radiation field strength test and analysis module in the on-site acquisition test subsystem of this scheme can ensure the capture of the electromagnetic radiation signals generated by the train traction system and the catenary system when the train is running at high speed, as well as the transient electromagnetic pulse signals generated by the catenary offline and through the special structure. The signal capture submodule and the high-speed transmission storage submodule can completely record the interference signals containing all frequency component information within the real-time bandwidth frequency band. At the same time, the test time can also meet the test requirements of recording the complete process when the high-speed EMU passes through any special section or occurs under various special working conditions.

[0297] (3) The signal reconstruction module design scheme in the signal reconstruction test subsystem of this scheme can make the generated signal avoid showing data stream phase imbalance or carrier leakage as much as possible because the modulation and carrier signals are generated in the digital domain, and compensate for the amplitude and phase distortion caused by the frequency response through the reconstruction filter submodule, thereby realizing seamless conversion and reconstruction of the field collected and stored signals.

[0298] In addition, the module can also use an external mixer and a fixed-frequency local oscillator to achieve the extended function of multi-channel signal synchronization.

[0299] (4) The design of the monitoring correction module in the signal reconstruction test subsystem of this scheme is based on the influence of relevant factors such as antenna and cable loss and the transfer impedance of the injection device. The signal waveform emitted by the receiving component will produce certain distortion. In order to make it closer to the signal in the acquisition test subsystem, the monitoring correction module combines the antenna characteristic parameters and cable transmission parameters through Fourier transform to correct the waveform in the generating module in the time domain, thereby achieving the signal strength of the antenna transmission signal as close as possible to the actual environment beside the railway track.

[0300] Figure 7A schematic diagram of the structure of a device for recording and simulating the electromagnetic environment of the space beside the high-speed railway track provided for one or more embodiments of the present specification, wherein the device is applied to a high-speed railway system, and the high-speed railway system includes: a field acquisition test subsystem and a signal reconstruction test subsystem; the device includes: a field electromagnetic field strength data acquisition unit 702, a parameter acquisition unit 704, a reconstruction unit 706 and an operation simulation unit 708.

[0301] An on-site electromagnetic field strength data acquisition unit 702 is used to acquire on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system through the on-site acquisition test subsystem;

[0302] A parameter acquisition unit 704 is used to acquire relevant design parameters of the high-speed railway system and external area parameters of the simulation location;

[0303] A reconstruction unit 706 reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters through the signal reconstruction test subsystem to obtain an on-site electromagnetic interference field strength signal;

[0304] The operation simulation unit 708 inputs the on-site electromagnetic interference field strength signal to the electromagnetic sensitive device, so as to make the electromagnetic sensitive device perform operation simulation, thereby obtaining whether the electromagnetic sensitive device operates normally based on the on-site electromagnetic interference field strength signal.

[0305] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

Claims

1. A method for recording and simulating the electromagnetic environment of the trackside space of a high-speed railway, characterized in that: The method is applied to a high-speed railway system, which includes: a field acquisition test subsystem and a signal reconstruction test subsystem; the method includes: The on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system is collected by the on-site collection test subsystem; Obtaining relevant design parameters of the high-speed railway system and external area parameters of the simulation location; The signal reconstruction test subsystem reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters to obtain an on-site electromagnetic interference field strength signal; The on-site electromagnetic interference field strength signal is input into the electromagnetic sensitive device so that the electromagnetic sensitive device performs operation simulation, thereby obtaining whether the electromagnetic sensitive device operates normally based on the on-site electromagnetic interference field strength signal.

2. The method according to claim 1, characterized in that The field acquisition test subsystem includes an acquisition receiving module and an electromagnetic field strength analysis module; The collecting of on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system through the on-site collection test subsystem includes: Based on a preset high-speed railway line structure, the on-site electromagnetic emission data generated by the electromagnetic interference source of the high-speed railway system is collected by the collection and receiving module; The on-site electromagnetic emission data is processed by the electromagnetic field strength analysis module to obtain the on-site electromagnetic field strength data.

3. The method according to claim 2, characterized in that The pre-set high-speed railway line structure includes a first line structure for collecting the on-site electromagnetic emission data by fixing a designated sensor at a trackside position, and a second line structure for collecting the on-site electromagnetic emission data by installing the designated sensor on a drone. The first line structure includes a line structure that is convenient for installation at a trackside position, and the second line structure includes a line structure that is not convenient for installation at a trackside position.

4. The method according to claim 2, characterized in that: The electromagnetic field strength analysis module includes a frequency conversion submodule, a real-time spectrum analysis submodule, a digital fluorescent display submodule, a signal capture submodule and a high-speed transmission storage submodule; The step of processing the on-site electromagnetic emission data by the electromagnetic field strength analysis module to obtain the on-site electromagnetic field strength data includes: The signal input port of the frequency conversion submodule is connected to the acquisition receiving module to convert the on-site electromagnetic emission data into a voltage signal, and the voltage signal is attenuated, frequency-selective filtered and multi-order mixed to achieve frequency change of the voltage signal; The real-time spectrum analysis submodule digitizes and corrects the frequency-changing voltage signal through high-speed sampling, and performs calculation and output of the on-site electromagnetic field strength data through digital down-conversion and a combination of multiple Fourier transforms, and the on-site electromagnetic field strength data is a real-time spectrum transformation; The input port of the signal capture submodule is connected to the signal output port of the real-time spectrum analysis submodule to receive the on-site electromagnetic field strength data, and store the on-site electromagnetic field strength data in the high-speed transmission storage submodule; The frequency domain waveform output by the on-site electromagnetic field strength data is rasterized by the digital fluorescent display submodule, and a frequency signal is output through superposition accumulation, bitmap database update, color coding and curve mapping, and the frequency signal is displayed on the display screen built into the digital fluorescent display submodule.

5. The method according to claim 1, characterized in that The signal reconstruction test subsystem includes a signal reconstruction module, an interference signal application module and a monitoring correction module; The signal reconstruction test subsystem reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters to obtain an on-site electromagnetic interference field strength signal, including: The signal reconstruction module filters and reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters to obtain reconstructed on-site electromagnetic field strength data; The reconstructed on-site electromagnetic field strength data is amplified by the interference signal applying module to obtain amplified on-site electromagnetic field strength data; The amplified on-site electromagnetic field strength data is corrected by the monitoring correction module to obtain the on-site electromagnetic interference field strength signal.

6. The method according to claim 5, characterized in that The signal reconstruction module includes a high-speed digital-to-analog conversion submodule and a reconstruction filter submodule; The filtering and reconstructing of the on-site electromagnetic field strength data, the design parameters and the external area parameters by the signal reconstruction module to obtain the reconstructed on-site electromagnetic field strength data includes: The on-site electromagnetic field strength data, the design parameters and the external area parameters are imported into the input end of the signal reconstruction module, the on-site electromagnetic field strength data, the design parameters and the external area parameters are modulated by the digital composite modulator and the digitally controlled oscillator of the signal reconstruction module, and the conversion is completed in the high-speed digital-to-analog conversion submodule in combination with multi-rate digital interpolation, and the amplitude and phase distortion caused by the frequency response of the converted on-site electromagnetic field strength data, design parameters and external area parameters are compensated by the reconstruction filter submodule at the output end of the signal reconstruction module to obtain reconstructed on-site electromagnetic field strength data.

7. The method according to claim 5, characterized in that The monitoring and correction module includes a monitoring and correction submodule, a receiving component and a feedback transmission component; The amplified on-site electromagnetic field strength data is corrected by the monitoring correction module to obtain the on-site electromagnetic interference field strength signal, including: receiving the amplified on-site electromagnetic field strength data through the receiving component; The amplified on-site electromagnetic field strength data is sent to the power divider of the monitoring and correction submodule, and the amplified on-site electromagnetic field strength data is digitized and corrected through high-speed sampling by the monitor of the monitoring and correction submodule, and the on-site electromagnetic interference field strength signal is output by performing calculations through digital down-conversion and a combination of multiple Fourier transforms, and the on-site electromagnetic interference field strength signal is a real-time spectrum transformation; The on-site electromagnetic interference field strength signal is compared and analyzed with the on-site electromagnetic field strength data by the corrector of the monitoring correction submodule, and each frequency component in the on-site electromagnetic interference field strength signal is corrected to obtain the on-site electromagnetic interference field strength signal.

8. The method according to claim 1, characterized in that The design parameters include one or more of the train running speed, the number of pantographs raised when the train is running to draw electricity, the opening direction of the pantograph, the material of the contact wire, the contact network tension and the dynamic contact pressure of the pantograph and the network; the external area parameters include one or more of the weather conditions, geological conditions and terrain conditions.

9. The method according to claim 1, characterized in that: If the electromagnetic sensitive device cannot operate normally based on the on-site electromagnetic interference field strength signal, the method further includes: Based on the design parameters and the external area parameters, determining the variation of the on-site electromagnetic field strength data in different areas; Obtaining anti-interference parameters of the electromagnetic sensitive device; Determine the area suitable for installing the electromagnetic sensitive device according to the variation of the on-site electromagnetic field strength data in different areas and the anti-interference parameters of the electromagnetic sensitive device; The installation location of the electromagnetic sensitive device is adjusted based on the domain range.

10. A device for recording and simulating the electromagnetic environment of the trackside space of a high-speed railway, characterized in that: The device is applied to a high-speed railway system, and the high-speed railway system includes: a field acquisition test subsystem and a signal reconstruction test subsystem; the device includes: An on-site electromagnetic field strength data acquisition unit, which acquires on-site electromagnetic field strength data generated by the electromagnetic interference source of the high-speed railway system through the on-site acquisition test subsystem; A parameter acquisition unit, which acquires relevant design parameters of the high-speed railway system and external area parameters of the simulated location; A reconstruction unit, which reconstructs the on-site electromagnetic field strength data, the design parameters and the external area parameters through the signal reconstruction test subsystem to obtain an on-site electromagnetic interference field strength signal; The operation simulation unit inputs the on-site electromagnetic interference field strength signal into the electromagnetic sensitive device, so that the electromagnetic sensitive device performs an operation simulation, thereby obtaining whether the electromagnetic sensitive device operates normally based on the on-site electromagnetic interference field strength signal.

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