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1297results about "Measuring interference from external sources" patented technology

Probe test equipment and test method

The invention relates to the technical field of probe testing, and discloses a probe testing device and method, and the method comprises the steps: carrying out the synchronous collection of the electric signal response characteristics of a plurality of chip testing probes in a chip contact process, analyzing the signal transmission interference relation between the probes, and obtaining a multi-probe signal coupling feature pattern; identifying a target signal transmission channel to obtain a first test probe configuration scheme; performing test signal input and response acquisition on the chip to obtain electrical characteristic time-frequency data of the chip; and performing multi-probe collaborative analysis and feature extraction on the time-frequency data of the electrical characteristics of the chip to obtain abnormal indication information of the electrical performance of the chip, and adjusting test parameters and contact positions of a plurality of chip test probes to obtain a configuration scheme of a second test probe. Therefore, the test system can intelligently adjust the subsequent test strategy according to the preliminary test result, and the intelligence and automation of the test process are realized.
Owner:东莞市台易电子科技有限公司

Power cabinet comprehensive monitoring method and system based on multiple sensors, and power distribution cabinet

The invention discloses an electric power cabinet comprehensive monitoring method and system based on multiple sensors and a power distribution cabinet, and relates to the technical field of sensor monitoring. During operation of the system, various sensor data are collected from an electric power cabinet and the surrounding environment of the electric power cabinet, and electromagnetic environments, equipment states and environmental parameters inside and outside the electric power cabinet are monitored in real time; the method comprises the following steps: preprocessing original sensor data through a signal filtering algorithm, extracting feature information related to electromagnetic interference (EMI) from the processed data, calculating and obtaining an EMIindex through a machine learning algorithm, performing state evaluation and fault prediction on equipment in the power cabinet, providing early warning of fault types and giving maintenance suggestions, when the electromagnetic interference intensity exceeds the standard or an equipment fault occurs, a real-time alarm signal is automatically triggered through an intelligent judgment mechanism, a system self-adaptive control mechanism is started, an electromagnetic environment index and an equipment state report are generated, and remote monitoring is carried out on the electric power cabinet.
Owner:博方电气有限公司

Electromagnetic environment simulation method and system of display module, medium and product

The invention discloses an electromagnetic environment simulation method and system of a display module, a medium and a product, and relates to the field of electromagnetic variable measurement, and the method comprises the steps: receiving a test identification code inputted by a user, extracting a plurality of target scenes corresponding to the test identification code from a preset scene library, and generating a scene change sequence; determining a radio frequency interference source combination and a mechanical vibration parameter corresponding to the target scene; setting test parameters of the test time periods corresponding to the multiple target scenes, and generating a dynamic test sequence; receiving a key test scene marked by a user, and adjusting a test time period and test parameters corresponding to the key test scene to obtain a target test sequence; simulating an electromagnetic environment of the target display module, and recording simulation test parameters of the target display module; the simulation test parameters comprise display brightness, contrast and response time; and determining an electromagnetic compatibility evaluation result based on the target test sequence and the simulation test parameters. According to the invention, the accuracy of an electromagnetic compatibility test result can be improved.
Owner:ALTRON OPTOELECTRONICS (SHENZHEN) CO LTD

System intelligent electromagnetic compatibility optimization design method and system thereof

The invention relates to the technical field of electromagnetic compatibility optimization design methods, in particular to a system intelligent electromagnetic compatibility optimization design method and system, and the method comprises the following steps: building an electromagnetic simulation unit model of a component, and constructing a component model library; performing interference path analysis on the component model through a path optimization algorithm, identifying key nodes and interference source nodes, and constructing an electromagnetic interference path model; according to the electromagnetic interference path model, carrying out adaptive adjustment on electromagnetic radiation and immunity parameters of system components so as to optimize electromagnetic compatibility; carrying out dynamic prediction and parameter optimization adjustment on electromagnetic compatibility parameters of the system through a deep learning model; the electromagnetic compatibility of the system and the sub-modules thereof is integrally optimized by adopting a progressive feedback adjustment mechanism, and the technical contradiction in the traditional method is effectively solved by introducing innovative mechanisms such as path weight calculation, nonlinear adaptive adjustment and multi-level non-uniform optimization.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Storage battery capacity checking method of parallel intelligent direct-current power supply system

The invention discloses a storage battery capacity checking method for a parallel intelligent direct-current power supply system, and relates to the technical field of storage battery capacity checking, which comprises the following steps of: respectively deploying electromagnetic sensing modules with nanosecond-level response capability at a master control end and a slave node end of a communication bus, acquiring voltage disturbance waveform signals of the communication bus in an operation process, and performing feature extraction operation on the transient high-frequency interference pulse detected each time, and constructing a multi-dimensional feature sequence of the high-energy transient electromagnetic interference. By deploying the high-response electromagnetic sensing module and combining an active suppression mechanism of interference feature extraction and risk index driving, time alignment modeling and self-adaptive regulation and control of electromagnetic interference and communication performance are realized, the communication stability, the battery state recognition accuracy and the capacity accounting continuity of the system in a strong interference environment are effectively improved, and the system reliability is improved. And the anti-interference capability and the operation safety of the parallel direct-current power supply system are obviously enhanced.
Owner:XIAO YANG POWER SOURCES CO LTD

Chip electromagnetic compatibility analysis method, device and equipment

The invention relates to the technical field of data processing, and provides a chip electromagnetic compatibility analysis method, device and equipment, and the method comprises the steps: carrying out the multi-dimensional collection of electromagnetic radiation data of a chip, and obtaining time domain electromagnetic signal data, frequency domain electromagnetic signal data and space electromagnetic distribution data; an electromagnetic interference influence matrix of the chip is constructed and decomposed, after electromagnetic interference source distribution information and interference propagation path information are obtained, an electromagnetic compatibility dynamic evolution sequence of the chip is constructed and analyzed, and an electromagnetic stability parameter and an electromagnetic sensitivity parameter of the chip are calculated; and analyzing the electromagnetic interference influence matrix by using the electromagnetic stability parameter and the electromagnetic sensitivity parameter of the chip, and generating an electromagnetic compatibility evaluation result based on an analysis result. By means of the scheme, the problems that due to the fact that complex interaction between different electromagnetic signals and internal components of the chip cannot be comprehensively captured, a test result is different from performance in an actual operation environment, and interference and operation failure are caused are solved.
Owner:YIXIN MICRO SEMICON TECH (SHENZHEN) CO LTD

Parameter measurement method for frequency modulation monitoring antenna

The invention relates to the technical field of signal parameter measurement, and provides a parameter measurement method for a frequency modulation monitoring antenna, which realizes self-adaptive monitoring and accurate measurement of a complex electromagnetic environment through multi-dimensional data acquisition, intelligent analysis and dynamic optimization, and deeply integrates environment perception, signal processing and parameter optimization. A complete technical chain is formed, so that the parameter measurement method can have self-learning and self-adjusting capabilities, can cope with environmental changes and interference challenges in real time, remarkably improves the monitoring efficiency and the measurement precision, and provides a systematic solution for the application of a frequency modulation monitoring antenna in a complex scene.
Owner:NANJING HUAHU TECH DEV CO LTD

Radio frequency module electromagnetic compatibility analysis method and system

The invention relates to a radio frequency module electromagnetic compatibility analysis method and system, and the method comprises the steps: obtaining the structure data and electromagnetic parameter information of a radio frequency module, carrying out the electromagnetic simulation of the structure data based on the electromagnetic parameter information, and obtaining the corresponding simulation data of the radio frequency module; acquiring near-field scanning data of the radio frequency module, and performing correlation calculation on the near-field scanning data and the radio frequency module simulation data through a preset fully implicit frequency domain finite volume numerical algorithm to obtain corresponding far-field electromagnetic distribution characteristic data; obtaining interference emission data of the radio frequency module, and performing zero eigenvalue entropy correction to obtain corresponding interference propagation feature data; performing optimization analysis on the far-field electromagnetic distribution characteristic data and the interference propagation characteristic data to obtain corresponding initial optimization information; and performing scheme analysis on the initial optimization information and an EMC performance evaluation result to obtain a corresponding EMC optimization scheme. According to the invention, the electromagnetic characteristics of the radio frequency module can be evaluated more comprehensively, so that the accuracy of electromagnetic compatibility analysis is improved.
Owner:GUANGZHOU PEITIAN COMM TECH CO LTD

Electromagnetic compatibility test method and test system for industrial control power supply

The invention discloses an electromagnetic compatibility testing method and an electromagnetic compatibility testing system for an industrial control power supply, which are used for evaluating conducted interference, radiated interference and immunity performance. The system comprises a load module, a signal connection module, an electromagnetic interference measurement module, an immunity test module, a data processing module and a hardware acceleration module. The load module simulates the actual working state of the industrial control power supply through resistive, inductive, capacitive and dynamic loads; the signal connection module adopts high-frequency shielding and grounding optimization design, so that external interference is reduced; the electromagnetic interference measurement module is combined with the frequency domain analysis and time domain response module to capture interference signal characteristics and power supply dynamic output; the data processing module generates an electromagnetic compatibility report through a comprehensive evaluation algorithm; and the hardware acceleration module realizes real-time processing of high-frequency sampling data by utilizing the FPGA. The method is suitable for the electromagnetic compatibility test of the industrial control power supply in the fields of industrial automation, communication equipment and power electronics, and has wide engineering application value.
Owner:ZHONGCHENG TIMES CO LTD

Navigation chip packaging static test method, device and equipment and storage medium

The invention relates to a static test method, device and equipment for navigation chip packaging and a storage medium, and the method comprises the following steps: recognizing whether a three-dimensional packaging model has defect information, if yes, carrying out the defect type recognition and positioning of the three-dimensional packaging model based on the defect information, and if not, carrying out the static test of the navigation chip packaging model; obtaining a defect type and a defect position corresponding to the defect type; performing simulation test on the electrostatic electric field distribution corresponding to the defect position through preset electrostatic field simulation software to obtain an electric field intensity distribution diagram; performing influence performance degree evaluation on the navigation chip based on the electric field intensity distribution diagram to obtain a performance influence evaluation grade of the navigation chip; if the performance influence evaluation grade exceeds a preset grade threshold value, an electrostatic protection design scheme is formulated based on the electric field intensity distribution diagram of the defect position and the defect type, and the technical problem that in the packaging process of the navigation chip, the performance and the service life of the chip are affected by the electrostatic discharge phenomenon is solved.
Owner:BLUECORE STORAGE TECH (GANZHOU) CO LTD

Metering equipment interference signal suppression method and system in electromagnetic compatibility test

The invention discloses a metering equipment interference signal suppression method and system in an electromagnetic compatibility test, and the method comprises the steps: obtaining an input signal of metering equipment in the electromagnetic compatibility test, performing windowing processing on the input signal by adopting a self-adaptive fractional order window function, and then obtaining a frequency spectrum component of the input signal through self-adaptive fractional order Fourier transform; calculating the amplitude of the frequency spectrum component, comparing the amplitude with a power threshold value, and screening out the frequency spectrum component of the interference signal; establishing a spectrum model of the interference signal based on the interference signal spectrum component; and generating a frequency domain compensation signal considering interference signal phase correction, converting the frequency domain compensation signal into a time domain compensation signal, and superposing the time domain compensation signal and the input signal to obtain a signal after interference suppression. According to the method, the frequency spectrum characteristics of the signals in different frequency bands can be ensured to be clear, the interference signal components can be accurately identified, the energy distribution of the interference signals can be effectively simulated, and the high-efficiency interference suppression capability can still be kept in a variable signal environment.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD MARKETING SERVICE CENT

Method and system for analyzing and evaluating electromagnetic interference in power application environment

The invention relates to the technical field of electromagnetic compatibility, in particular to a power application environment electromagnetic interference analysis and evaluation method and system, and the method comprises the following steps: recording the position coordinates of a plurality of power devices based on power grid operation data, collecting the current and voltage data of the operation of the devices, and measuring the electromagnetic field intensity data of a plurality of positions of a power grid; an electromagnetic environment data set is generated. According to the method, the operation data and the electromagnetic field intensity of the power equipment are recorded, the understanding ability of the electromagnetic environment is enhanced, the shielding effect of various materials is accurately evaluated by combining the analysis of the shielding materials, the design and operation of the power equipment are optimized, and the electromagnetic sensitivity of the equipment is evaluated. According to the method, the dynamic distribution of the electromagnetic field is simulated and predicted, the electromagnetic field mode causing a fault is identified, and risk equipment predicted through real-time monitoring and data analysis is combined, so that the stability and safety of a power system are improved, the anti-interference capability is enhanced, and the operation efficiency and function safety of power facilities are improved.
Owner:ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER CO LTD

Switch cabinet quality comprehensive evaluation system and method based on Internet of Things technology

The invention discloses a switch cabinet quality comprehensive evaluation system and method based on the Internet of Things technology, and particularly relates to the technical field of switch cabinets. Electromagnetic interference detection equipment is installed, the electromagnetic field intensity around a switch cabinet and the operation state of the equipment are monitored in real time, and electromagnetic field data and state data in different time periods are obtained; carrying out weighted calculation on the electromagnetic interference index to generate an overall electromagnetic interference index; the fuzzy logic is utilized to comprehensively analyze the electromagnetic interference index and the real-time state data of the switch cabinet, a health assessment report is generated, the health condition of the equipment is accurately displayed, the operation monitoring and maintenance optimization capability of the switch cabinet is effectively improved, potential faults can be predicted, and misjudgment can be reduced.
Owner:FUJIAN CHENGKONG ELECTRIC CO LTD

Wiring harness dynamic load and electromagnetic interference coupling test method

The invention discloses a wiring harness dynamic load and electromagnetic interference coupling test method, and relates to the technical field of wiring harness testing, and the method comprises the steps: S1, defining a plurality of environment parameter groups, and constructing a test platform; s2, dynamic current pulse and multi-axis vibration excitation are synchronously loaded; s3, applying broadband electromagnetic interference signals and monitoring signal crosstalk amplitude and bit error rate changes; s4, the sensor nodes are dynamically configured according to the topological structure of the wire harness; s5, generating a feature vector; s6, outputting a wire harness performance index; s7, outputting a wire harness fault probability prediction value; s8, obtaining prediction data; s9, triggering a high-speed data recording mode, and storing original sensor data 60 seconds before the fault; and dynamically adjusting the gradient step length and the loading sequence in the environment parameter group. Performance evaluation, fault prediction and service life management can be carried out on the wire harness under complex working conditions, and the reliability and safety of an automobile electrical system are improved.
Owner:SHANDONG HUAKAI-PKC WIRE HARNESS CO LTD

Automatic test management method and system for electrostatic discharge immunity

The invention discloses an electrostatic discharge immunity automatic test management method and system. The method comprises the steps that real-time environment state data in an experimental environment are collected in real time, then redundancy mechanism and check algorithm processing is carried out, and discharge parameters of an electrostatic generator are calculated and adjusted in real time through a multi-dimensional nonlinear self-adaptive control algorithm; performing electrostatic discharge based on the adjusted discharge parameters of the electrostatic generator, generating electrostatic interference of specified parameters, simulating an actual scene of electrostatic discharge, further transmitting a generated electrostatic discharge interference signal to test equipment, and generating a corresponding response signal; the response signals and the interference signals are preprocessed and then subjected to deep spectrum analysis, key features are extracted, and the immunity of the test equipment is intelligently evaluated through a neural network model. The control precision of the electrostatic generator is improved, the electrostatic generator can dynamically adapt to the change of the experimental environment, and it is ensured that the discharging condition is always in the optimal state.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO MARKETING SERVICE CENT

Electromagnetic shielding effectiveness evaluation system for environmental laboratory

The invention discloses an electromagnetic shielding effectiveness evaluation system for an environmental laboratory, which relates to the technical field of electromagnetic shielding effectiveness evaluation and comprises a signal source module, a shielding body test module, an electromagnetic field detection module, a data acquisition and processing module and a verification and calibration module. Wherein the signal source module and the shielding body test module are used as hardware parts and are necessary parts in the evaluation system, and the electromagnetic field detection module, the data acquisition and processing module and the verification and calibration module are used as software parts, so that high-efficiency evaluation processing on a product is also realized; the technical key points are as follows: the scheme not only ensures the accuracy and reliability of an evaluation result, but also improves the consistency and repeatability of evaluation, and a scientific and effective method is provided for the evaluation of the shielding effectiveness of the wire sleeve; meanwhile, the scheme is also helpful to timely discover and correct problems in evaluation, and ensures that the product can meet specific requirements in actual use.
Owner:LISAI METROLOGY SERVICES (HUNAN) CO LTD

Electromagnetic compatibility test method and storage system for PCB (Printed Circuit Board) design

The invention provides an electromagnetic compatibility test method and system for PCB design, a PCB comprises a schematic circuit diagram and a structural model, and the method comprises the following steps: extracting high-frequency signal characteristics in the schematic circuit diagram to obtain an electromagnetic simulation parameter set; performing multi-physical field coupling modeling according to the electromagnetic simulation parameter set and the structure model to obtain an electromagnetic field-circuit model; performing frequency-time domain hybrid excitation loading on the electromagnetic field-circuit model to obtain an electromagnetic noise distribution diagram; performing gradient descent optimization on layout parameters of the structure model according to the electromagnetic noise distribution diagram to obtain an anti-interference layout scheme; and performing multi-working-condition Monte Carlo simulation and residual error calibration on the anti-interference layout scheme to generate a correction guidance library.
Owner:SHENZHEN QIANHENG ELECTRONICS CO LTD

BMS function test system and method for new energy automobile

The invention relates to the technical field of power battery testing, in particular to a BMS function testing system and method for a new energy automobile. The method comprises the following steps: constructing battery pack structure model data according to battery pack CAD design drawing data; collecting vehicle working condition charging and discharging sample data; carrying out adaptive current excitation sequence processing according to the vehicle working condition charging and discharging sample data, and generating multi-working condition disturbance pulse excitation sequence data; performing disturbance magnetic field simulation on the battery pack structure model data through the multi-working-condition disturbance pulse excitation sequence data to obtain working condition test magnetic disturbance response data; and performing battery pack BMS monitoring data acquisition based on the working condition test magnetic disturbance response data, performing BMS current distribution monitoring performance evaluation, and generating BMS current monitoring performance evaluation data. By simulating current excitation and magnetic field response under multiple working conditions, comprehensive evaluation of the BMS performance is realized, and the test accuracy and efficiency are improved.
Owner:SHENZHEN INTELLIWORK TECH CO LTD

Electromagnetic interference detection method for earthquake monitoring

The invention belongs to the technical field of geophysical monitoring, and relates to an electromagnetic interference detection method for earthquake monitoring, which comprises the following steps: deploying a multi-dimensional electromagnetic field sensing unit and an earthquake signal acquisition unit and realizing high-precision synchronization; synchronously acquiring multi-dimensional electromagnetic field and seismic physical signal data; performing multi-feature and noise feature extraction on the two; inputting the features into a pre-trained machine learning / deep learning model for identification, and outputting information such as interference type, intensity and azimuth angle; and carrying out influence evaluation and quality marking on the seismic data according to the output, and selectively inhibiting or compensating. Through the above scheme, multi-dimensional perception and characterization, high-precision synchronization and correlation analysis, intelligent identification and spatial positioning are realized, and the reliability and accuracy of earthquake monitoring data are significantly improved.
Owner:SEISMOLOGICAL BUREAU OF GANSU PROVINCE CHINA EARTHQUAKE ADMINISTRATION

Automatic equipment scheduling method and system for electromagnetic compatibility test

The invention discloses an automatic equipment scheduling method and system for an electromagnetic compatibility test, and the method comprises the steps: monitoring the state and spatial position information of each piece of equipment in real time, and calculating the electromagnetic radiation intensity of the equipment; sorting all the test tasks according to the priorities, and sequentially arranging the equipment from high priority to low priority for testing to form an initial equipment scheduling scheme; calculating the electromagnetic interference gradient of the equipment scheduling scheme, dynamically adjusting the equipment scheduling sequence by adopting the electromagnetic interference gradient, and updating the equipment scheduling scheme; the electromagnetic interference intensity between the devices is updated in real time, and then a device state interference matrix is dynamically evolved; global coupling feedback is calculated; and solving a multi-dimensional optimization objective function which comprehensively considers the total interference variable, the equipment state interference matrix and global coupling feedback under the current scheduling scheme to obtain an optimal equipment scheduling scheme. The method is high in scheduling efficiency, full in resource utilization, accurate in electromagnetic interference control, and capable of effectively meeting complex multi-device collaborative test requirements.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD MARKETING SERVICE CENT

Charging gun detection method and system for new energy electric vehicle

The invention relates to the field of electric vehicle charging gun detection, in particular to a charging gun detection method and system for a new energy electric vehicle. A charging gun detection system of a new energy electric vehicle comprises a correlation index analysis module, a test necessity analysis module and a test adjustment module. According to the method, the relevance between multi-dimensional parameters such as environment and use intensity and fault types is quantified in real time, so that the dynamic optimization of a detection strategy is realized, and the limitation of a static period and a fixed standard in traditional detection is broken through; based on the coupling analysis of the degradation index and the fault risk value, the system can adaptively identify the high-risk working condition, trigger the shortening of the local detection period and the grading up-regulation of the test standard, and the dynamic response mechanism not only avoids the redundant detection in the low-risk scene, but also can form early-stage accurate reinforced monitoring in the key fault hidden danger. And the safety protection and the detection resource efficiency are fundamentally balanced.
Owner:JIANGXI JIAOTOU ECOLOGICAL ENVIRONMENTAL PROTECTION CO LTD

Driver controller detection system

The invention discloses a driver controller detection system, which comprises an acquisition module, an acquisition module, a processing module, an identification module, a judgment module, an analysis module and a generation module, the acquisition module captures contact information and electromagnetic interference data of contacts in real time by means of a high-dynamic voltage sensor and a broadband EMC probe; the acquisition module is triggered by a locomotive signal and records dynamic working condition data; the processing module aligns the data, performs denoising and extracts fault parameters; the identification module scans the voltage waveform and judges the transient contact failure; the judgment module monitors EMC data and compares an instruction position, and judges misoperation; the analysis module analyzes fault association, judges a composite type and triggers an alarm; the generation module generates a detection report and a log. According to the system, a multi-dimensional monitoring network is constructed under a dynamic working condition, data reliability is guaranteed, faults are accurately identified, a compound fault source is positioned, and the safety and stability of locomotive operation are improved through risk grading early warning and automatic reporting.
Owner:BEIJING SUBWAY ROLLING STOCK EQUIP

Aircraft thunder indirect effect and HIRF conduction sensitivity test device and method

The invention relates to the technical field of aircraft lightning protection tests, and discloses an aircraft lightning indirect effect and HIRF conduction sensitivity test device and method, and the device comprises a device under test (EUT), an accompanying monitoring device, an auxiliary device, an HIRF injection probe, a lightning injection probe, a monitoring probe, a lightning signal isolator, and an HIRF conduction test system. The invention discloses a lightning indirect effect test system and a digital oscilloscope. Aiming at the problem of electromagnetic environment potential safety hazards caused by independent evidence obtaining and independent rectification of civil aircraft thunder and lightning and HIRF airworthiness, thunder and lightning indirect effect and HIRF conduction sensitivity tests can be simultaneously carried out on an aircraft electronic and electrical system, the thunder and lightning and HIRF comprehensive protection performance of the aircraft electronic and electrical system is verified, and the potential safety hazards of the electromagnetic environment are effectively reduced. The thunder and lightning indirect effect and HIRF conduction sensitivity test device is simple in construction and easy for engineering realization, and can also be used for thunder and lightning and HIRF protection performance verification tests of other aircrafts.
Owner:HEFEI HANGTAI ELECTROPHYSICS

Full-performance electromagnetic compatibility immunity automatic test method and system

The invention provides an automatic testing method and system for full-performance electromagnetic compatibility immunity, relates to the technical field of electronic equipment testing, and aims to accurately simulate electromagnetic interference signals and propagation characteristics thereof through real-time monitoring and data preprocessing in combination with a dynamic modulation function and a recursive coupling model, so that the testing precision and reliability are improved. By introducing a global feedback mechanism and disturbance integration, the immunity evaluation is dynamically optimized, the stable response of the tested equipment under various interferences is ensured, and the comprehensiveness of the evaluation is enhanced. Besides, a self-adaptive dynamic response model is further designed, the test system can dynamically adapt to response changes of equipment through self-adaptive adjustment of test parameters, the test efficiency is improved, errors are reduced, and the advantages of high efficiency and accuracy are shown in an electromagnetic compatibility test.
Owner:国网福建省电力有限公司营销服务中心 +1

Composite shielding material effect experiment data analysis method

The invention discloses a composite shielding material effect experiment data analysis method, and particularly relates to the field of material shielding effect analysis, and the method comprises the following steps: measuring key data such as dielectric constant, magnetic conductivity, conductivity and thickness of each layer of a composite shielding material through an electromagnetic performance measurement instrument; establishing an electromagnetic wave propagation model for describing propagation of electromagnetic waves in the multilayer medium based on a Maxwell equation, and defining boundary conditions of a test sample; time domain and frequency domain characteristics of an electromagnetic interference source are simulated through Fourier transform, and actual input interference is simulated. And analyzing the dynamic response of the electromagnetic wave propagation model under transient and steady-state interference signals to form an electromagnetic wave interference response propagation model. Through comparison with actual shielding effectiveness test data, model parameters are adjusted, and it is ensured that model calculation errors are within an acceptable range. A full-band shielding effectiveness prediction map of the composite shielding material is generated based on the model, and theoretical support is provided for material design and optimization.
Owner:FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID

Anti-interference method and device for high-frequency coaxial cable

The invention relates to the technical field of cable anti-interference, and discloses a high-frequency coaxial cable anti-interference method and device.The method comprises the steps that a radial progressive impedance gradient double-layer shielding structure with an inner shielding layer and an outer shielding layer is constructed, and a triangular supporting frame structure is arranged between the inner shielding layer and the outer shielding layer; an electromagnetic induction probe is installed on the triangular supporting frame structure, and differential interference signals between the inner shielding layer and the outer shielding layer are collected; performing time-frequency domain conjoint analysis on the differential interference signal to obtain an interference source feature mapping map; and performing multi-mode interference identification and suppression according to the interference source characteristic mapping map to generate an interference offset signal, and performing real-time elimination and feedback on electromagnetic interference in the inner shielding layer and the outer shielding layer based on the interference offset signal to obtain an interference offset feedback effect. And signal reflection and crosstalk among the structures of all layers in the cable are effectively compensated.
Owner:SHENZHEN HILUM TECH CO LTD

Electromagnetic compatibility test data automatic acquisition and analysis method and system

The invention discloses an electromagnetic compatibility test data automatic acquisition and analysis method and system. The method comprises the following steps: automatically acquiring electromagnetic compatibility test data as an input signal and extracting a target signal; respectively extracting an amplitude component and a change rate component of the target signal, combining to obtain a complex eigenvalue, and performing time integration on the complex eigenvalue to obtain an eigenvector component of the target signal; dividing a frequency space into a low-frequency band and a high-frequency band, and calculating the power density of each frequency point of the target signal in a segmented manner; and carrying out quantitative analysis on the electromagnetic compatibility to obtain an electromagnetic compatibility score. According to the method, the target signal can be accurately extracted from the mixed input signal in real time, the multi-dimensional features are extracted from the target signal, the time domain and frequency domain features of the target signal are comprehensively described, the frequency spectrum power density is accurately calculated in a segmented and adaptive manner, the accurate quantitative analysis of the electromagnetic compatibility level is realized, and the accuracy of the electromagnetic compatibility is improved. And the accurate evaluation requirements of different test scenes on the compatibility level can be met.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD MARKETING SERVICE CENT

Verification method, device and equipment for vehicle electromagnetic compatibility pedestrian simulation system and storage medium

The invention discloses a whole vehicle electromagnetic compatibility pedestrian simulation system verification method, device and equipment and a storage medium, and relates to the technical field of whole vehicle electromagnetic compatibility pedestrian simulation systems. The simulation test scene data is collected by building a whole vehicle electromagnetic compatibility pedestrian test scene in a whole vehicle semi-anechoic chamber; verifying an electromagnetic compatibility whole vehicle function based on the simulation test scene data to determine a verification result; and expanding an electromagnetic compatibility whole vehicle function item based on the verification result to determine a whole vehicle intelligent driving function test tool, and applying the whole vehicle intelligent driving function test tool to automatically match typical road working conditions. According to the invention, the simulation test scene is established in the whole vehicle semi-anechoic chamber, the data is collected, and the extended function items of the whole vehicle electromagnetic compatibility function are verified, so that the typical road working conditions are automatically matched, the performance test efficiency and accuracy of the intelligent driving system in a complex electromagnetic environment are remarkably improved, and the safety and stability of the vehicle are ensured.
Owner:VOYAH AUTOMOBILE TECH CO LTD

Electromagnetic compatibility test data processing method and system based on Internet of Things

The invention provides an electromagnetic compatibility test data processing method and system based on the Internet of Things, and relates to the technical field of electromagnetic compatibility test data processing. The method comprises the following steps: acquiring electromagnetic compatibility test data of the electromagnetic range; analyzing electromagnetic compatibility test data of the electromagnetic range; and the electromagnetic compatibility test accuracy of the electromagnetic range is comprehensively analyzed, optimized and adjusted. By collecting and processing electromagnetic compatibility test data of the electromagnetic range, the electromagnetic compatibility test data of the electromagnetic range is analyzed, the electromagnetic compatibility test accuracy evaluation index of the electromagnetic range is obtained through comprehensive analysis, and the electromagnetic compatibility test accuracy of the electromagnetic range is optimized and adjusted; the accuracy of the electromagnetic compatibility test data processing method based on the Internet of Things is improved, and the problem that the accuracy of the electromagnetic compatibility test data processing method based on the Internet of Things is insufficient in the prior art is solved.
Owner:CHEARI BEIJING CERTIFICATION & TESTING +2

Electromagnetic compatibility intelligent test and diagnosis system and method

The invention relates to the field of electromagnetic compatibility testing, and particularly discloses an electromagnetic compatibility intelligent test diagnosis system and method, and the method comprises the steps: firstly obtaining an electromagnetic emission spectrogram of a tested object, and collecting current values and voltage values of the tested object at a plurality of preset time points through a sensor, and then carrying out the deep learning technology, the three components are subjected to feature extraction and correlation analysis, and finally an electromagnetic interference grade classification label is obtained through a classifier, so that site limitation is reduced, the test flexibility is improved, valuable insight is provided for product design and improvement, and design optimization and performance improvement are promoted.
Owner:GUANGZHOU WEIDIAN TECHNOLOGY CO LTD