32 results about "Phase frequency response" patented technology

The invention discloses a high-precision frequency synchronization method based on cross-spectrum phase slope. The method comprises the following steps: a reference node sends a frequency information transmission signal; the common node receives the frequency information transmission signal; the common node performs mutual correlation with a reference signal generated by a local clock through matched filtering to obtain time delay information; the common node calculates a phase difference according to the time delay information and calibrates a local frequency according to the phase difference; wherein the time delay information is measured through a cross-spectrum phase slope method, and the cross-spectrum phase slope method calculates time delay according to the slope of a phase-frequency response curve of a matched filtering result. According to the high-precision frequency synchronization method based on the cross-spectrum phase slope, the problems of low phase discrimination resolution and low frequency offset resolution during frequency synchronization caused by low sampling frequency of a distributed system are solved.

The invention relates to the field of inter-satellite ranging, in particular to a GRACE-FO inter-satellite ranging data processing method based on improved CRN filtering, and the method comprises the steps: constructing an LRI1A data preprocessing process in a low-order gravity satellite detector, reading LRI1A-M and LRI1A-T phase measurement original data, and carrying out the phase unwrapping and time mark correction processing; calculating a gain fluctuation level at an orbit frequency, and selecting a low-pass filter design parameter index; constructing an FIR digital filter based on a window function method, calculating time domain tap coefficients of a CRN filter and an improved filter, and carrying out normalization processing at an orbital frequency; according to an LRI biased distance calculation principle, calculating an inter-satellite biased distance and an inter-satellite distance, a rate and an acceleration after low-pass filtering; zero filling is carried out on the offset distance between satellites, the amplitude-frequency response and phase-frequency response characteristics of the offset distance between the satellites are calculated, and the improved filtering algorithm has great advantages in the aspects of improving passband flatness, enhancing high-frequency noise suppression and shortening the order of the filter. According to the invention, the precision and stability of gravitational field inversion are significantly improved.

The invention relates to the technical field of wireless communication, and discloses a novel channel estimation method based on residual frequency offset elimination, which comprises the following steps of: despreading descrambled pilot frequency data to obtain a channel estimation value after noise smoothing, and transmitting the channel estimation value to an FIR (Finite Impulse Response) filter to generate a noise suppression channel estimation signal; phase-frequency response of the noise suppression channel estimation signal is obtained through calculation, conjugate multiplication and smoothing are conducted on the phase-frequency response of the noise suppression channel estimation signal and the phase-frequency response of the FIR filter, a residual frequency offset estimation signal for suppressing the noise influence is obtained and compensated to the noise suppression channel estimation signal output by the FIR filter, and a noise suppression channel estimation value for eliminating the residual frequency offset influence is obtained. And balancing with the service de-spreading signal compensated by the residual frequency offset estimation signal to obtain a final output signal. According to the method, the phase-frequency response characteristics of the filter are deeply analyzed, the FIR filter is used for improving the signal-to-noise ratio, meanwhile, the residual frequency offset is estimated through the phase-frequency characteristics of the FIR filter, finally, the phase error is compensated for, an accurate channel estimation value is obtained, and the signal detection precision is improved.

The application discloses a spectrometer based on a random spiral grating, wherein a device layer is an optical waveguide, the device layer comprises a random spiral grating, two groups of transmission waveguides and two groups of grating couplers; incident light is coupled into the first group of transmission waveguides through the first group of grating couplers, and then is transmitted to the random spiral grating from the first group of transmission waveguides; the amplitude-frequency response of the optical signal is randomly modulated through the random spiral grating; the application further comprises a heater; the random spiral grating is non-uniformly heated by the heater, so that the temperature of the random spiral grating is changed, and the phase-frequency response of the optical signal passing through the random spiral grating is randomly changed; finally, the obtained random optical signal is transmitted to the second group of grating couplers through the second group of transmission waveguides, and is coupled out from the second group of grating couplers; the application has the advantages of micron-level size, large bandwidth and super-high resolution.

The invention discloses a servo steering engine performance parameter testing method and device and a medium, and relates to the technical field of industrial control, and the method comprises the steps: collecting the real-time feedback data of a servo steering engine, adjusting the frequency range and the frequency step length of a sweep frequency through employing a genetic algorithm, and generating a sweep frequency parameter; calculating the amplitude of the frequency sweep instruction and the amplitude of the steering engine operation feedback data based on the performance fitting data set, obtaining an amplitude-frequency characteristic curve, selecting a bandwidth frequency point when the amplitude is reduced to a specified proportion according to the amplitude-frequency characteristic curve, and generating a phase-frequency characteristic curve; analyzing the phase frequency response of the target frequency point according to the phase frequency characteristic curve, judging whether the phase requirement is met or not, obtaining the bandwidth qualification state, evaluating the overall performance of the servo steering engine, and generating a performance evaluation report. According to the invention, the automation and flexibility of the test process are improved, and the test efficiency and performance of the industrial control system are further optimized.

This invention discloses a low-overhead error calibration method and apparatus for array optical digitization systems. Addressing the issues of synchronization errors, mixing phase errors, and optical time-domain demultiplexing crosstalk errors that easily occur in multi-channel structures and synchronization processing of ultra-wideband array optical digitization systems, this invention proposes for the first time a method for joint extraction and correction based on the phase-frequency response differences of these three types of errors through a single injection of multi-frequency signals. This invention establishes a global error model for the array optical digitization system. By acquiring and analyzing the phase-frequency response of the decoupled signal through a single signal input, various major errors can be accurately separated and compensated, eliminating the need for complex iterative processes and additional reference paths, thus significantly simplifying the calibration process. This method effectively improves array channel consistency and digital beamforming accuracy, and has significant implications for enhancing the real-time performance and large-scale scalability of array photonic digitization systems. This invention is applicable to array optical digitization systems in various high-channel-count, wideband application scenarios.

The application is based on a SERF gyroscope multi-parameter measurement method of magnetic field phase frequency response, first measuring B y The phase frequency characteristic curve of the alternating magnetic field response is obtained through a lock-in amplifier y The response phase of the SERF atomic spin gyroscope under the alternating magnetic field is zero; different amplitude direct current magnetic fields are applied to the z axis respectively, the above process is repeated, and then B y The linear fitting of the zero-phase frequency value of the alternating magnetic field response can obtain the accurate values of the electronic magnetic field and the slowing-down factor. The method can realize the accurate measurement of the electronic magnetic field, the nuclear spin magnetic field, the slowing-down factor and the alkali metal atom density of the SERF atomic spin gyroscope in a very short time without causing the relaxation of the SERF atomic spin gyroscope.

The invention provides a consistency test method, device, system and equipment and a readable storage medium, and the method comprises the steps: obtaining a reference signal sequence and a to-be-tested signal sequence, the reference signal sequence and the to-be-tested signal sequence are electric signals synchronously generated by the reference microphone and the to-be-tested microphone in response to the same preset audio test signal respectively; according to the reference signal sequence and the to-be-tested signal sequence, obtaining a transfer function from the to-be-tested microphone to the reference microphone; based on the transfer function, calculating amplitude-frequency response and phase-frequency response of the microphone to be tested relative to the reference microphone; and obtaining a consistency test result of the microphone to be tested according to the amplitude-frequency response and the phase-frequency response. The objective and quantifiable consistency evaluation method provided by the invention can identify the fine consistency deviation which cannot be found only by an absolute performance test from a more comprehensive performance perspective, and realizes the automatic evaluation of the microphone consistency.

This application discloses an optical domain decoupling amplitude-frequency response equalization optimization method and apparatus. First, a system-level calibration is performed on the optoelectronic link, which includes an arbitrary waveform generator, intensity modulator, photodetector, and oscilloscope, to obtain the overall frequency response of the link, including amplitude and phase frequency responses. Then, the transmitter amplitude-frequency response is obtained through optical domain scanning and normalization. The receiver amplitude-frequency response is separated from the overall amplitude-frequency response through decoupling operations. Finally, a transmit-receive domain equalization strategy is used to complete transmit signal pre-distortion compensation and receive signal de-embedding compensation, respectively. This successfully achieves a balance between testing cost, testing time, and equalization performance, realizing low-cost, high-efficiency, and high-performance frequency response decoupling and equalization compensation for IMDD high-speed optical links. It provides an efficient, economical, and high-performance solution for the research and testing of IMDD high-speed optical modules.

This application provides a virtual playback simulation method, apparatus, device, and medium, relating to the fields of audio signal processing and audio playback device simulation technology. The method includes: acquiring an input audio signal and complex frequency response data of a target audio playback device, the response data including amplitude frequency response data and phase frequency response data; adaptively selecting a target algorithm from multiple preset virtual playback simulation algorithms according to preset application constraints; the multiple preset algorithms have different delay characteristics, accuracy levels, and computational complexity, and at least one algorithm adopts a frequency resolution processing method matching the characteristics of human auditory perception; using the target algorithm, processing the input audio signal based on the complex frequency response data to generate an output audio signal simulating the playback effect of the target audio playback device. This application improves the flexibility, accuracy, real-time performance, and perception optimization effect of virtual simulation through the organic combination of adaptive algorithm selection and auditory perception optimization.

Method for determining a function state (FZ) of an ultrasonic sensor (2) for a vehicle (1), having the steps of: a) applying (S1) an electrical test signal (P) to the ultrasonic sensor (2); b) detecting (S2) an electrical response signal (A) from the ultrasonic sensor (2); c) determining (S3) a phase-frequency response (PF) comprising the phase angle (α) of the detected response signal (A) for the applied test signal (P) on the basis of an excitation frequency (f) of the applied test signal (P); d) comparing (S4) at least a first phase angle (P1) below and a second phase angle (P2) above a resonant frequency (R) in the determined phase-frequency response (PF) with a respective expected phase angle (PE1, PE2); e) correcting (S5) the determined phase-frequency response (PF) on the basis of the comparison; and f) determining (S6) the function state (FZ) on the basis of the corrected phase-frequency response (PFK).

The present invention discloses a design method and system for a channel equalizer with flexible controllability of frequency response error, belonging to the technical field of digital array channel equalizer design, and solving the problem that the prior art cannot flexibly control the fitting errors of the channel amplitude-frequency and phase-frequency responses; by constructing convex constraint conditions for the amplitude-frequency and phase-frequency response fitting errors, the channel equalizer design problem is transformed into a second-order cone programming optimization problem that can obtain a global optimal solution, and the design method has strong robustness and is convenient for practical engineering applications; at the same time, compared with the frequency-domain least squares design method, the channel equalizer design method provided by the present invention can independently and flexibly control the fitting errors of the channel amplitude-frequency response and phase-frequency response. When the engineering implementation resources are limited, appropriately relaxing the fitting error of the amplitude-frequency (or phase-frequency) response can obtain a higher-precision fitting error of the phase-frequency (or amplitude-frequency) response, and the control is flexible.

This invention discloses a method for testing the frequency characteristics of intelligent transformers based on smart grids, belonging to the field of power system testing technology. The method includes: injecting a sweep frequency excitation signal into the winding of the transformer under test and simultaneously acquiring the response signal to obtain amplitude-frequency and phase-frequency response data; performing logarithmic transformation and median filtering preprocessing on the amplitude-frequency data; constructing a high-order rational fractional transfer function model using a vector fitting algorithm; extracting complex poles and calculating the quality factor to construct a multi-dimensional pole distribution map; introducing a pre-constructed frequency band sensitivity matrix to divide the entire frequency band into characteristic frequency bands and preliminarily determine axial displacement faults in the winding coil; performing coordinate registration between the current pole map and the reference fingerprint pole set, calculating the offset vector, and diagnosing the defect type based on multiple criteria to generate a report. This invention can effectively suppress noise interference from complex electromagnetic environments, provide quantitative damage diagnosis indicators, and achieve highly sensitive and fully automated assessment of the mechanical state of transformer windings.

The invention provides a magnetotelluric detection interference suppression method and device, electronic equipment and a storage medium, is applied to a magnetotelluric sounding system, and relates to the technical field of data processing. The method comprises the following steps: decoding original data of magnetotelluric sounding; wherein the decoded original data comprises electric field data and magnetic field data; performing noise reduction processing on the decoded original data; wherein the noise reduction processing comprises the steps of filtering power frequency interference, eliminating a direct current component, removing low-frequency trend interference and deducting equipment amplitude phase frequency response; carrying out the normalization processing of the original data after noise reduction, carrying out the impedance estimation, and determining the parameters corresponding to the original data of the magnetotelluric sounding; wherein the parameters at least comprise one of impedance tensor, apparent resistivity, impedance phase and tipper information; and through various noise reduction means, the amplitude and phase reliability of the signal at the natural electromagnetic field analysis frequency is improved, so that the impedance estimation precision is improved.

The invention discloses a high-precision rapid in-situ measurement device and method for polarization parameters of an atomic common magnetometer, and belongs to the technical field of quantum precision measurement and ultrahigh-sensitivity inertial measurement. Based on an atom manipulation technology, a transverse modulation magnetic field is applied to an atom ensemble through a three-axis magnetic field coil, a lock-in amplifier is adopted to extract device output phase frequency response, a longitudinal axis magnetic field is gradually scanned until the minimum phase frequency response is obtained, and therefore a nuclear spin polarization equivalent magnetic field and an electron spin polarization equivalent magnetic field are obtained. And further obtaining the electron spin polarizability, the nuclear spin polarizability and the nuclear spin longitudinal relaxation time. According to the invention, the rapid in-situ measurement of the atom ensemble polarization parameters of the SERF gyroscope is realized, and the measurement precision is improved.

The present application relates to a kind of methods for measuring the amplitude-frequency and phase-frequency response of radio frequency cavity, comprising: the digital radio frequency low level system generates sawtooth wave pulse frequency signal, and generates frequency control word;The digital radio frequency low level system generates sine data sequence and cosine data sequence according to the frequency control word, and the sine data sequence and the cosine data sequence are quadrature modulated, the output of the quadrature modulation is converted to digital-analog after output to the power source, and then the power amplifier is carried out power amplification and the directional coupler coupling after generation radio frequency signal input to the radio frequency cavity;The digital radio frequency low level system obtains the cavity pressure signal of the radio frequency cavity, and the forward voltage signal and reverse voltage signal of the directional coupler;The digital radio frequency low level system carries out real-time signal processing according to the cavity pressure signal, the forward voltage signal and the reverse voltage signal, and obtains the amplitude-frequency and phase-frequency response curve of the radio frequency cavity.

The embodiment of the application discloses a voice coil motor hysteresis modeling method and a related product, wherein the steps of the method comprise: determining a transfer function relationship between an output displacement and an input current, determining a phase frequency response and an amplitude frequency response relationship according to the transfer function relationship between the output displacement and the input current; and based on the phase frequency response and the amplitude frequency response relationship, fitting a voice coil motor hysteresis trajectory by using a neural network to obtain a voice coil motor hysteresis model. The scheme disclosed in the application can effectively describe the hysteresis phenomenon exhibited by the voice coil motor when the output millimeter-level displacement is output, and the description effect of the model basically remains unchanged with the change of the frequency, and the scheme has a more stable dynamic trajectory tracking effect than a pure NARX neural network model.

The application discloses a small frequency difference MEMS gyroscope detection phase shift suppression system, which is composed of a MEMS gyroscope, a driving loop, an angular velocity demodulation module and a parametric suppression loop. The application focuses on applying a parametric suppression signal to the detection resonator, electrostatically correcting the amplitude-phase frequency response, suppressing the detection phase shift under the small frequency difference mode, and improving the impact resistance. The detection resonator is embedded in the parametric suppression loop to generate stable amplitude self-excitation oscillation. A band-pass phase shifter is used to generate a parametric suppression signal twice the detection frequency from the detection amplitude multiplier. After the phase is shifted by 90 degrees to meet the parametric suppression phase condition, the parametric suppression signal acts on the parametric suppression electrode. Without losing the mechanical sensitivity of the MEMS gyroscope, the detection phase shift and the resonance peak amplitude at the detection natural frequency are suppressed, and the impact resistance is improved.

The application belongs to the technical field of optical communication, and particularly relates to a low-complexity digital pre-equalizer based on a frequency-domain comb pilot channel estimation. The application comprises a data sending module, a channel response testing module and a digital signal pre-equalization module. The data sending module comprises an initial comb signal generation and a frequency component phase rotation. The channel response testing module comprises a signal frequency difference estimation and recovery and a channel amplitude-frequency and phase-frequency response testing. The digital signal pre-equalization module comprises a filter coefficient generation and a sending signal convolution pre-equalization. The application analyzes the channel amplitude-frequency and phase-frequency responses by sending a frequency-domain comb pilot signal, and generates a pre-equalizer for pre-compensating the channel response at a sending end. The application has the characteristics of high granularity, high precision, robust transmission signal system and the like, and can be applied to various scenes such as polarization multiplexing long-distance single-carrier coherent optical transmission and mode multiplexing short-distance intensity modulation direct detection systems.

The application discloses a transformer winding short-circuit state detection method based on pulse frequency response curve characteristics, first extracts the anti-resonance point of the amplitude-frequency response curve and the L-C zero-crossing point of the phase-frequency response curve to carry out function fitting, calculates amplitude-phase coexistence fitness TS, judges whether the winding to be detected is faulty or not; then carries out gray scale transformation on the pulse frequency response curve image, calculates image metric relationship TC, distinguishes winding inter-turn short circuit or winding capacitor fault; after judging the winding capacitor fault, calculates the gray scale-gradient coexistence rate TM of the pulse frequency response curve image, and distinguishes winding inter-turn short circuit or pie inter-turn short circuit.

The invention discloses a hearing aid earplug sound leakage ultrasonic characteristic diagnosis method based on an intelligent sensor, and relates to the technical field of nondestructive testing, and the method comprises the steps: collecting the initial state data of a hearing aid, executing signal modulation and parameter calibration, and obtaining an earplug configuration and control list; according to the earplug configuration and control list, transmitting an ultrasonic detection signal to the hearing aid earplug, synchronously acquiring echo time domain data, and executing fast Fourier transform to generate an amplitude-phase frequency response curve; and performing feature crude extraction on the amplitude-phase frequency response curve by using an envelope detection method to form acoustic impedance anomaly spectrum features. Through the constructed loss acoustic model, accurate inversion of the leakage rate is realized, the diagnosis accuracy is remarkably improved, defect classification is performed by adopting an SVM algorithm, the sealing performance test instruction is generated according to a preset rule, closed-loop control from diagnosis to execution is realized, and the detection efficiency is remarkably improved.

The application discloses a kind of thermal coupling decoupling measurement methods based on composite sensitive structure, it is related to extreme environment sensing measurement technical field, provide composite sensitive structure: composite sensitive structure from bottom to top includes substrate, thermoelectric pile film formed on substrate, heat insulation layer formed on thermoelectric pile film, and piezoelectric film formed on heat insulation layer;Dynamic response characteristic matrix of composite sensitive structure is constructed: the thermal coupling coefficient between piezoelectric film and thermoelectric pile film when pressure and thermal excitation act simultaneously is calculated, and dynamic response characteristic matrix is constituted by amplitude-frequency response coefficient, phase-frequency response coefficient and thermal coupling coefficient.The application adopts the technical route of composite sensitive structure, dynamic characteristic matrix and frequency domain decoupling, solves the problem that traditional method is difficult to separate thermal coupling signal in real time from measurement principle, realizes the synchronous measurement of dynamic pressure and transient temperature under extreme environment.

The present application provides a frequency response measurement method, device, system and storage medium, relating to the technical field of frequency response measurement. The frequency response measurement system includes: a light source device; the light source device is configured to provide a continuous optical signal to the electro-optic modulator to be measured; a signal source device; the signal source device is configured to provide a pulse signal to the electro-optic modulator to be measured; wherein, adjacent pulses in the pulse signal have a fixed phase relationship; a measurement device; the measurement device is configured to collect the modulated optical signal output by the electro-optic modulator to be measured according to the optical signal and the pulse signal, and convert the modulated optical signal into an electrical signal; the electrical signal is used to calculate the frequency response of the electro-optic modulator to be measured; the frequency response includes at least a phase-frequency response. The present application can provide a technical solution with low measurement process complexity and capable of measuring the phase-frequency response of an electro-optic modulator.

The present invention relates to the technical field of electric actuator control. Specifically, it relates to a method, device, and medium for coordinating the amplitude-frequency and phase-frequency responses of an electric actuator. The method includes: obtaining a first control instruction for the electric actuator, and obtaining an instruction recognition frequency based on this instruction; obtaining feedforward and dead zone compensation coefficients based on the instruction recognition frequency; performing low-pass filtering on the first control instruction to obtain a second control instruction; obtaining a feedback result of the electric actuator operating based on the second control instruction, and obtaining a first control output according to the PID control algorithm; obtaining a second control output based on the feedforward compensation algorithm, the second control instruction, and the feedforward compensation coefficient; obtaining a third control output based on the dead zone compensation algorithm, the first and second control outputs, and the dead zone compensation coefficient; adjusting the amplitude-frequency and phase-frequency responses of the electric actuator according to the first, second, and third control outputs. In this way, the problem of conflict in the synchronous improvement of the amplitude-frequency response and phase-frequency response of the electric actuator is solved.

The invention discloses a method for representing metal stress through multiple characteristics of resonant eddy current, which comprises the following steps of: establishing a function relationship between stress and electromagnetic parameters by utilizing a change rule of equivalent parameters such as inductance and resistance of a resonant eddy current sensor in a stress state; in the specific implementation process, firstly, a stress detection system based on resonance eddy current is built, and a phase-frequency response curve and an amplitude-frequency response curve of a test piece are collected under the condition that different force points are loaded; then extracting the maximum value of the resonant frequency and the amplitude-frequency response signal, and calculating corresponding inductance and resistance values; and finally, respectively establishing stress calibration curves by taking inductance or resistance as an independent variable and a loading force as a dependent variable, and realizing quantitative characterization and inversion of stress, so that characterization of the stress state of the metal material can be realized under a non-destructive condition.

The present invention discloses a frequency response correction method for a front-end analog channel of a broadband digital oscilloscope. An ideal fast-edge signal and an expected channel frequency response characteristic are constructed in a digital domain. The output of the ideal fast-edge signal after passing through an expected frequency response model is used as an expected response of the fast-edge signal. The time domain parameters are compared with the fast-edge response output of the actual front-end analog channel to obtain the deviations of each parameter. The deviation correction indication signals corresponding to the parameter deviations are used to correct the frequency response H of the compensation filter. c (e jω ) is corrected, so there is no need to use expensive high-sampling rate, high-bandwidth, high-precision sampling oscilloscopes to perform sampling to complete the correction of the channel frequency response of the front end of the broadband oscilloscope. In addition, the present invention uses a frequency sampling method to uniformly design compensation filters for amplitude-frequency response and phase-frequency response, and finally converts all of them into FIR compensation, achieving efficient and simple compensation with high compensation accuracy, and can be applied to occasions where the channel amplitude-frequency characteristics and phase-frequency characteristics are very undesirable.

This invention proposes a relative time delay estimation method for multi-DAC parallel signal generation technology, belonging to the field of digital signal processing technology. It addresses the technical problem of the influence of nonlinear phase on the estimation of relative time delay. The method includes the following steps: Step 1: Input a known full-band multi-tone sinusoidal signal into a digital frequency divider filter for frequency division; Step 2: Combine the frequency-divided signals to obtain the system's broadband output signal; Step 3: Acquire the broadband output signal using an oscilloscope to obtain the system's output time-domain data, and preprocess the broadband output time-domain data; Step 4: Perform phase-frequency response analysis on the preprocessed output time-domain data to obtain the system's full-band phase-frequency response, and output the unwrapped image of the time-domain data; Step 5: Use an improved RANSAC algorithm, combined with the system's full-band phase-frequency response, to fit the preprocessed output time-domain data, obtaining the fitted image and the relative time delay.

The invention belongs to the technical field of satellite navigation interference, and relates to a navigation interference method and device for a space-frequency adaptive anti-interference unmanned aerial vehicle. The method comprises the following steps: dividing a navigation signal spectrum into a plurality of equal parts; randomly generating a first random number; generating at least one second random number; according to the value of the first random number and the second random number, assigning a value to a frequency domain frequency point value of a signal transmitted by the first jammer and the second jammer to obtain a transmitted signal of a frequency point until the transmitted signal of the corresponding frequency point is generated for all navigation signal spectrums; converting into a time domain signal to obtain a first sequence signal and a second sequence signal; the first jammer and the second jammer transmit signals. According to the invention, the characteristics of space-frequency adaptive processing are utilized, and a spatial domain filter generated by an anti-interference system is induced to generate violent nonlinear phase-frequency response through double-station frequency spectrum cooperation, so that the phase of a satellite navigation signal is actively disturbed; the problems that the traditional interference is low in cost-effectiveness ratio and easy to expose are solved; customized interference can be realized.

The invention relates to the technical field of power equipment state detection, in particular to a transformer winding turn-to-turn short circuit degree evaluation and positioning method, system and device and a storage medium. Preparing a layered calibration sample and carrying out turn number calibration, replacing a winding sample layer by layer, collecting frequency response data and carrying out denoising processing, and constructing a sample data set covering different layers and short circuit degrees; mapping the phase-frequency response and the amplitude-frequency response into a polar graph, converting the polar graph into a grayscale image, extracting multi-dimensional texture features, and performing dimension reduction and weight distribution optimization to form a deformation evaluation matrix; frequency response data of a winding to be measured are collected, feature vectors are extracted, and two-dimensional matching calculation is carried out on the feature vectors and global features and layered features of the deformation evaluation matrix; an error correction factor is introduced to determine a short-circuit degree quantized value and position a fault layer number, and a fault level is determined according to an evaluation threshold and a result is output; the problems that in the prior art, sample preparation precision is low, data collection interference resistance is weak, a fault layer cannot be positioned, and evaluation adaptability is poor are solved.