779results about "Measuring interference from external sources" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to measure phase information and amplitude associated with the resistive-inductive-capacitive sensor, and a noise detection circuit communicatively coupled to the measurement circuit and configured to determine a presence of external interference in the system based on at least one of the phase information and the amplitude information.

The invention relates to the technical field of electromagnetic compatibility testing, in particular to an electromagnetic compatibility testing device and method for the shaft current of a hub motor, and the device comprises a shielding chamber, a system master controller, a dynamometer, a hub motor tool and a testing system. A dynamometer, a hub motor tool and a test system are arranged in the shielding chamber; the hub motor tool is used for installing and fixing a hub motor to be tested. An output shaft is designed at the rotor end of the hub motor, and the hub motor is connected with the dynamometer through the output shaft. The test system is used for measuring the shaft current of the hub motor; the system master controller is used for controlling the wheel hub motor to operate under various working conditions and collecting shaft current under each working condition; and obtaining an electromagnetic compatibility test result according to the shaft current. The electromagnetic compatibility and reliability of the hub motor and the control system thereof can be improved.

The invention relates to the technical field of radio orientation, in particular to an unmanned aerial vehicle flight state detection method based on a frequency spectrum detection technology, which comprises the following steps: acquiring an initial time domain signal of an initial frequency spectrum signal of an unmanned aerial vehicle in a monitoring period in a flight process; segmenting the initial time domain signal according to the flight state so as to screen out each complex change time period; performing signal decomposition on the time domain sub-signals in each complex change time period to obtain a plurality of components; and determining an interference frequency tendency index of each component, determining an interference characteristic comprehensive index of each component according to the interference frequency tendency index of each component, the oscillation intensity characteristic value and the correlation coefficient, and reconstructing the frequency spectrum sub-signal corresponding to the time domain sub-signal to obtain a target frequency spectrum signal. According to the method, the data reference value of the target spectrum signal obtained through adaptive filtering is larger, and the accuracy of detection of the flight state of the unmanned aerial vehicle is improved.

The invention discloses a ship power grid transient electromagnetic interference grading evaluation method and system, relates to the technical field of ship power grid safety evaluation, realizes scientific grading evaluation of ship power grid transient peak interference, and provides a reliable basis for stable operation and equipment protection of a ship power grid. Comprising the following steps: measuring a transient peak sensitive threshold value of equipment by adopting a peak signal transduction sensitivity test; performing classification and importance coefficient assignment on the equipment according to the importance degree of the equipment; and calculating a weighted average sensitive threshold value of load equipment at the rear end of the distribution box by adopting a weighted average method. At the output end of a power distribution box of a ship power grid cabin, a transient peak conducted emission detection device is used for monitoring and collecting power grid transient peak conducted emission data in real time, and a power grid transient peak interference measured value is recognized from the power grid transient peak conducted emission data. Comparing the power grid transient peak interference measured value with the weighted average sensitive threshold value, and calculating a difference value between the two values; and according to a difference value result, carrying out ship power grid transient peak interference grading evaluation.

The invention discloses a parameter optimization method for a chip electromagnetic fault injection test, and the method comprises the steps: collecting a large number of electromagnetic fault injection test data of a training chip, and constructing a training data set; training a plurality of models by using the constructed training data set, and establishing a mapping relationship between the electromagnetic fault injection parameter and the attack success rate; collecting a small amount of electromagnetic fault injection test data of the novel-type chip to be tested; carrying out transfer learning on the trained model by using data of a chip to be tested with a new model, and selecting an optimal model from the models after transfer learning; determining a value range of electromagnetic fault injection parameters of a chip to be detected of a new type, constructing a multi-dimensional parameter space, and generating uniformly distributed parameter combinations by using a Latin hypercube sampling method; and inputting the parameter combinations into the optimal model, predicting the attack success rate of each parameter combination, and selecting the optimal parameter combination of the electromagnetic fault injection test. According to the method, the electromagnetic fault injection parameter combination can be automatically optimized, and the manual tuning cost is reduced.

The invention discloses an intelligent test system and method for traction current interference, and belongs to the technical field of high-speed railway signal system testing, and the system comprises a signal generation module which is used for generating an interference signal and a track circuit signal; the track circuit transmission module is used for simulating electrical characteristics of a real track circuit and transmitting interference signals and track circuit signals; the mobile vehicle-mounted equipment is used for dynamically simulating the train operation condition, receiving the interference signal and the track circuit signal and generating a vehicle-mounted signal decoding result; the signal acquisition module is used for acquiring current signals in a receiving end steel rail; and the test control analysis platform is used for receiving the output signal and performing data processing to generate a test report. According to the invention, by introducing the electrical environment simulation and mobile vehicle-mounted equipment test module of a real track circuit and fusing the steady state and transient interference simulation technology, the comprehensive and accurate evaluation of the anti-interference performance of the high-speed railway signal system in a complex electromagnetic environment can be realized.

The invention relates to the technical field of electromagnetic compatibility testing, and provides a current-based magnetic field radiation emission limit value cutting method and device and electronic equipment. Comprising the steps of obtaining working current parameters of tested equipment; determining a basic limit value of magnetic field radiation emission, obtaining a working current of the tested equipment when the magnetic field radiation is the basic limit value, and taking the working current as a reference current threshold value; when the working current parameter is greater than the reference current threshold value, calculating the clipping amount of the magnetic field radiation emission limit value based on the ratio of the working current parameter to the reference current threshold value; and cutting the basic limit value according to the cutting amount to obtain the magnetic field radiation emission limit value of the tested equipment. The limit value is compatible with the existing electromagnetic compatibility national military standard magnetic field radiation emission limit value, so that the electromagnetic compatibility test assessment of the large-current equipment can be evaluated more reasonably and accurately, and the method has high engineering application value.

A multi-channel analog-digital converter (ADC) subsystem for test device such as a spectrum analyzer may include multiple multi-channel ADCs to receive down-converted signals and convert the received signals to digital output signals, a field programmable gate array (FPGA) to select one or more ADCs based on a frequency, a bandwidth, and / or a signal type of each received signal and a characteristic of each ADC, and an ADC sample clock to provide a clock signal to the selected ADCs. Characteristics of the ADCs may include a resolution, a signal-to-noise-and-distortion ratio (SINAD), an effective number of bits (ENOB), a signal-to-noise ratio (SNR), a total harmonic distortion (THD), a total harmonic distortion plus noise (THD+N), and / or a spurious free dynamic range (SFDR).

The present invention relates to a system 1 and a method 1000 for identifying a cause of electromagnetic interference in an electrically operated device. The system 1 comprises an evaluation filter device configured to generate at least one filtered frequency spectrum 102, 104, 106 based on an electromagnetic frequency spectrum 100. Furthermore, the system comprises a marker determination device 40 that determines a marker characteristic value for the filtered frequency spectrum, wherein the marker characteristic value PE is a measure of the energy content of the filtered electromagnetic frequency spectrum. A disturbance identification device compares the at least one determined marker characteristic value PE with an associated reference marker characteristic value PEref and identifies a cause of electromagnetic interference based on a comparison result.

The invention relates to the technical field of electrical engineering, and discloses a converter valve short-circuit current test system and method, and a generator branch in the system comprises a short-circuit generator, a short-circuit control unit and a bidirectional thyristor valve; one end of the generator branch is connected to one end of the sample valve through the short circuit control unit and the bidirectional thyristor valve in sequence; the other end of the sample valve is connected to the other end of the generator branch; the capacitor branch is arranged at two ends of the sample valve in parallel; the capacitor branch comprises a short-circuit valve body control unit, a capacitor bank and a direct-current power supply; one end of the short-circuit valve body control unit is connected to one end of the sample valve, and the other end is connected to the other end of the sample valve through the capacitor bank; the direct-current power supply is arranged on the capacitor bank in parallel; according to the invention, independent decoupling adjustment of the alternating current component and the direct current component of the short-circuit current is realized, and the test requirements on the gradually increased peak value of the short-circuit current, the thermal capacity and the short-circuit current containing the high-proportion direct current component are met.

The embodiment of the invention discloses an electrostatic discharge inspection method and device for stacked chips, equipment and a storage medium, relates to the technical field of semiconductor circuits, and can save inspection time and computing resources so as to effectively improve inspection efficiency. The method comprises the steps that to-be-inspected discharge paths of stacked chips are divided into a first type of discharge paths and a second type of discharge paths, the first type of discharge paths represent electrostatic discharge paths coinciding with those in two-dimensional electrostatic discharge inspection, and the second type of discharge paths represent electrostatic discharge paths crossing core particles; performing two-dimensional electrostatic discharge inspection on each core particle forming the stacked chip so as to cover the first type of discharge path; and based on a shortest discharge path principle, screening out a target discharge path from the second type of discharge paths to perform electrostatic discharge inspection, wherein the target discharge path represents the shortest electrostatic discharge path in the electrostatic discharge paths crossing the core particles. The method and the device are suitable for electrostatic discharge inspection scenes of semiconductor chips.

The invention discloses a JSD-based field distribution test method and device in a complex electromagnetic environment, a medium and equipment. The method comprises the following steps: acquiring sample data of an electromagnetic signal in a microwave reverberation chamber; the method comprises the steps of obtaining a preset zero hypothesis and a preset alternative hypothesis; converting discrete sample data into a continuous empirical probability density function through kernel density estimation; calculating the Jensen-Shannon divergence between the empirical probability density function and the probability density function of the assumed distribution as the statistical magnitude of the JSD test; if the JSD test statistic is lower than the critical value, the assumed distribution corresponding to the preset zero hypothesis is not rejected, otherwise, the assumed distribution corresponding to the preset zero hypothesis is rejected, and the alternative hypothesis is accepted. The method can recognize the distribution form of the electromagnetic field in the reverberation chamber, and solves the limitation of a conventional hypothesis testing method when the number of independent samples is small or candidate distribution is similar.

The invention discloses an intelligent driving system reliability evaluation method based on an EMC test, and relates to the technical field of EMC tests, and the method comprises the steps: obtaining intelligent driving system software and hardware interaction request data under the condition that a target vehicle is subjected to the closed electromagnetic interference, evaluating software and hardware interaction states of the intelligent driving system of the target vehicle, performing prior distribution screening on the software and hardware interaction states and functional fault feedback data of the known intelligent driving system, and establishing a known fault chain development network of software and hardware components of the intelligent driving system of the target vehicle; according to the intelligent driving system soft and hard component fault chain development network of the target vehicle, analyzing posterior distribution of the target vehicle open road real-time intelligent driving system soft and hard component interaction request list, and establishing an intelligent driving system fault chain development trend evaluation model; and predicting an intelligent driving system soft and hard component function failure risk score of the target vehicle. The method has the advantage that the safety and robustness of the intelligent driving system of the EMC test are remarkably improved.

The invention discloses a frequency spectrum monitoring and interference analysis method for power grid wireless communication, and particularly relates to the technical field of wireless frequency spectrum monitoring. Outputting an eddy current distribution parameter set based on the power frequency magnetic field intensity distribution data of the monitoring point; synchronously acquiring a frequency spectrum signal and a power frequency magnetic flux density signal; calculating high-frequency harmonic frequency point characteristics of secondary radiation generated by the frequency spectrum monitoring equipment in the power frequency magnetic field, and generating an eddy current characteristic spectral line graph; extracting a frequency band energy value matched with the eddy current characteristic spectral line diagram in the frequency spectrum signal, and calculating a pollution proportion of secondary radiation to the frequency spectrum signal in combination with the power frequency magnetic flux density signal; eliminating pollution signal components according to the pollution proportion, and outputting a real spectrum; and performing joint scanning on the real frequency spectrum, extracting modulation characteristics and spatial orientation of the residual interference signal, and generating an interference source positioning report. The problem of real spectrum signal distortion caused by eddy current secondary radiation in a power frequency magnetic field environment is solved, and the accuracy and reliability of spectrum monitoring and interference analysis are improved.

The invention relates to the technical field of circuits, and discloses an electro-optical signal conversion method and equipment. The equipment comprises an input module which is connected with at least two paths of signal output interfaces of tested equipment and is used for transmitting at least two paths of signals of the tested equipment to a signal processing module; the signal processing module is used for combining and encoding the at least two paths of signals to generate an electric signal, and transmitting the electric signal to the electro-optical conversion module; the electro-optical conversion module is used for converting the electric signal into an optical signal; and the main control chip is used for controlling the working mode of at least one of the input module, the signal processing module, the main control chip and the electro-optical conversion module according to the current signal transmission state. The electric signal is converted into the optical signal, so that the influence of electromagnetic coupling is avoided.

The invention discloses an integrated cabinet testing device and a detection method thereof, particularly relates to the technical field of integrated cabinet state detection, and is used for solving the problem that in the prior art, gradual drift of a signal monitoring unit under transient electromagnetic interference cannot be quantized, and consequently equipment degradation characteristics and measurement errors are difficult to decouple. A high-strength transient electromagnetic interference environment conforming to switch operation physical characteristics is simulated in a cabinet; the acquisition end of the signal monitoring unit is connected with a high-precision reference sensor in parallel to realize millisecond-level synchronous acquisition of double-track signals; generating a difference sequence representing drift; self-adaptive fault excitation is dynamically generated based on the interference characteristic frequency band of the difference value sequence; performing covariance matrix orthogonal decomposition on the mixed signal, separating a drift feature vector and a fault feature vector, and calculating a projection scalar value; and finally, the historical reference output drift interference coefficient and the three-level fault confidence report are combined, so that the credibility of predictive maintenance of the intelligent power distribution system is remarkably improved.

The invention belongs to the field of flexible direct-current transmission power module tests, and discloses a multi-dimensional electromagnetic compatibility test system and method for a flexible direct-current transmission power module, and the method is characterized in that a dynamic power grid simulation unit simulates the electrical stress of the power module under a complex working condition by reproducing power grid limit faults such as direct-current short circuit and alternating-current harmonic waves; the broadband interference injection unit is used for superposing multi-band electromagnetic interference to simulate a composite interference scene according to the noise characteristics of the IGBT / IGCT switching process; the multi-physical field monitoring unit synchronously acquires key parameters such as electromagnetic field intensity, signal transmission, temperature rise and vibration, and analyzes module response under the action of multiple stress coupling in real time. According to the system, cooperative loading of power grid faults and noise is realized, limitation of a single interference source and a simple scene in a traditional test is broken through based on multi-physics field data fusion analysis, and the comprehensive evaluation precision of the anti-interference capability, the operation reliability and the safety of the power module in an extreme electromagnetic environment is improved.

The invention discloses a visual automobile electromagnetic compatibility radiation anti-interference test method, device and equipment, and relates to the technical field of vehicle testing, and the method comprises the steps: collecting the radiation anti-interference test data of automobile electronic equipment from a plurality of test equipment in real time through a data collection layer, and transmitting the data to a data processing layer; cleaning, analysis and feature extraction are carried out on the data in the data processing layer to obtain key indexes, and the key indexes comprise the maximum radiation value and the standard exceeding frequency number; inputting the key indexes into a visual display layer, and displaying the distribution, ranking and trend of test results of different vehicle enterprises and vehicle types in the forms of maps, histograms and line diagrams; the key index is monitored in real time based on a preset threshold value, an alarm signal is triggered when the key index exceeds the preset threshold value, and early warning prompt information is generated; and a test scheme is optimized according to the alarm signal and the early warning prompt information, and test parameters of the data acquisition layer are dynamically adjusted.

The invention relates to the technical field of electrical variable measurement, in particular to a power distribution overhead line fault traveling wave positioning anti-electromagnetic interference method and system and a medium. According to the method, a broadband equivalent circuit model of a power distribution overhead line is constructed based on a vector matching method and is used for simulating transmission characteristics of fault traveling waves and switching operation overvoltage; performing multi-scale decomposition on the acquired signals by adopting a wavelet transform algorithm, extracting disturbance signal parameters, and calculating traveling wave propagation characteristics according to different fault types and switch working conditions; constructing an electromagnetic disturbance propagation coupling model, and performing time-frequency domain analysis by taking the traveling wave propagation characteristics, the disturbance signal parameters and the line environment parameters as input to obtain coupling characteristics of electromagnetic disturbance; carrying out numerical simulation by utilizing electromagnetic field simulation software, analyzing the influence of line environment parameters on coupling characteristics, and optimizing model parameters; and finally, analyzing the coupling characteristics of electromagnetic disturbance, eliminating the influence of electromagnetic interference on the traveling wave signal through a reverse decoupling algorithm, and achieving the accurate fault positioning of the power distribution overhead line.