81 results about "Amplitude response" patented technology

The invention discloses a hysteresis compensation system and method for low-frequency compensation of a magnetoelectric vibration sensor. The compensation system comprises a difference to single-end circuit, a second-order lag compensation circuit, a single-chip microcomputer, an ADC conversion module, a first-order high-pass filtering module and a second-order low-pass filtering module which are sequentially connected with the magnetoelectric vibration sensor. The differential-to-single-end conversion circuit receives voltage signals output by the magnetoelectric vibration sensor and converts the voltage signals into single-end electric signals, the second-order lag compensation circuit receives the single-end electric signals of the differential-to-single-end conversion circuit for low-frequency compensation, the single-chip microcomputer receives low-frequency compensation signals, the ADC conversion module converts the low-frequency compensation electric signals into digital signals, and the digital signals are transmitted to the magnetoelectric vibration sensor. The first-order high-pass filtering module filters noise with the frequency lower than f1 out of the digital signals, and the second-order low-pass filtering module filters noise with the frequency higher than f2 out of the digital signals output by the first-order high-pass filtering module. According to the invention, the amplitude response of the magnetoelectric vibration sensor during low-frequency signal measurement can be improved.

The invention provides a TMD lockout control method for motion suppression of a semi-submersible platform, and the method comprises the steps: carrying out the frequency domain decomposition of a random wave predicted by a target sea condition, obtaining the energy distribution of each frequency component, obtaining the equivalent amplitude of each frequency component according to the energy distribution, considering the amplitude response of the platform under the action of waves of different frequencies, and achieving the motion suppression of the semi-submersible platform. The method comprises the following steps of: calculating a weight ratio of platform motion response caused by each frequency component under the action of random waves by integrating three types of information, namely amplitude, amplitude response and motion suppression effect, and finally carrying out weighted combination on the locking time corresponding to each frequency component according to the weight ratio, so as to obtain the motion suppression effect of the platform. And the optimal locking control time suitable for the current random wave is obtained. According to the method, a high-complexity non-causal control command does not need to be deduced, control parameters can be updated in real time according to short-term sea condition changes, pitching response of a platform is effectively reduced, and comprehensive optimization control over multi-frequency waves is achieved.

Methods and systems for generating a sound. The method includes obtaining meshes representing at least one object in a frame of an environment, the environment including a source and a receiver; determining spatial continuity information and reflection normal information of the meshes; determining, based on the spatial continuity information and the reflection normal information, reflection paths between the source and the receiver involving the at least one object, each of the reflection paths having at least one reflection point associated with the at least one object; obtaining spatially sampled results by spatially sampling a space around the at least one reflection point of reflection paths using multiple distributions of rays, the spatially sampled results correlating with geometric information of the meshes; generating reflection amplitude responses for each of multiple audible frequencies in the environment based on the spatially sampled results; and producing a sound based on the reflection amplitude responses.

The invention provides an anti-interference method and device applied to low-frequency communication, and belongs to the technical field of wireless communication anti-interference, and the method comprises the steps: obtaining a received signal, carrying out the time domain windowing processing, then carrying out the fast Fourier transform, converting the received signal from a time domain to a frequency domain, obtaining an initial frequency domain signal, and transmitting the initial frequency domain signal to a receiver; then, the amplitude response of the filter is used as a standard template to be matched with the power spectrum estimation of the initial frequency domain signal, and under the condition that the power spectrum of the filtering signal exceeds a preset threshold value of the matching template, the frequency point is determined as interference, and an interference detection result is obtained; according to an interference detection result, carrying out notch processing on the initial frequency domain signal so as to carry out accurate suppression on a detected interference frequency point and obtain a target frequency domain signal; after the frequency domain processing is completed, inverse fast Fourier transform and time domain reconstruction are carried out on the target frequency domain signal to obtain a reconstructed target signal, so that frequency domain narrowband interference suppression is realized, and the quality and real-time performance of signal processing are remarkably improved.

The invention discloses an unmanned aerial vehicle noise elimination method and device for cross-medium direct acoustic communication, and the method comprises the steps: carrying out the sampling of a known detection signal and a receiving signal, obtaining a frequency domain expression, calculating a cross-medium sound pressure transmission function, and extracting amplitude response, phase response and group delay; based on a normalization ratio and local maximum detection method, identifying a center frequency set of unmanned aerial vehicle propeller noise; the notch depth, bandwidth, frequency compensation and phase compensation are determined by combining channel characteristic parameters, and a cascade notch filter is constructed; and inputting the channel characteristic parameters into the deep learning model, outputting a filter parameter correction amount, realizing dynamic updating of the filter, obtaining the filter capable of suppressing noise, and further obtaining a denoised communication signal. According to the invention, precise detection of propeller noise frequency and multi-dimensional adaptive adjustment of filter parameters can be realized.

The invention provides a quartz crystal microbalance resonant frequency detection system, a control method and a terminal, a direct digital frequency synthesis excitation unit is adopted to generate a frequency sweep excitation signal with a preset frequency range and stepping, and the frequency sweep excitation signal is conditioned by a signal injection and conditioning unit and then injected into a QCM sensor. And then the pure amplitude response detection unit measures and quantifies voltage response amplitudes of the QCM sensor under different excitation frequencies, and the resonant frequency intelligent determination unit determines the resonant frequency of the QCM sensor according to the voltage response amplitudes. According to the invention, a QCM self-oscillation circuit does not need to be designed and debugged, a precise phase detection assembly does not need to be configured, the circuit board layout is simpler, and components are greatly reduced. The QCM resonant frequency can be accurately measured only through efficient amplitude detection, a complex algorithm is avoided, the operational capability requirement and the software development difficulty are reduced, the QCM resonant frequency measuring device has the advantages of being simple in structure, low in cost, easy to integrate and the like, miniaturization and low-power-consumption design can be easily achieved, and the QCM resonant frequency measuring device is suitable for portable and wearable application.

The invention is suitable for the technical field of geophysical exploration, and provides a rock physics-driven time-frequency domain longitudinal wave velocity dispersion attribute prediction method, which comprises the following steps of: establishing a rock physics model; under the driving of the rock physical model, inverting the porosity of the microfractures in the well, calculating the skeleton elastic modulus of the rock containing the fractures, and predicting a frequency-dependent longitudinal wave velocity logging curve; constructing a time-frequency domain longitudinal wave velocity seismic inversion initial model; constructing a TF-AVO theoretical formula, developing a time-frequency domain longitudinal wave velocity seismic inversion method based on an L-BFGS algorithm, and performing longitudinal wave velocity inversion by taking the initial model as prior information; analyzing the relative change of the frequency-varying longitudinal wave speed under different frequencies, and quantitatively predicting the frequency dispersion attribute of the longitudinal wave speed; and on the basis of logging data, calibrating a longitudinal wave velocity dispersion attribute prediction result, and carrying out reservoir oil and gas detection. The method has higher precision and resolution, the stability and reliability of longitudinal wave velocity dispersion attribute prediction are remarkably improved, and the dependence on strong amplitude response is overcome.

The present invention concerns a computer implemented method for processing an audio signal for which an audio signal containing speech is obtained. Then a smoothed difference signal is derived from the obtained audio signal and smoothed spectrum thereof. At least one peak is detected in the obtained difference signal and a peaking filter generated based on the at least one detected peak. The peaking filter comprises at least a Q factor and a gain parameter, whereas the Q factor is based on the geometrically obtained cut-off frequencies around the at least one detected peak; and the gain parameter is derived from a gain interaction matrix with elements based on magnitude responses at cut-off frequencies around the at least one detected peak.

The invention discloses a millimeter wave dual-polarization phased-array antenna beam forming method and device, and relates to the technical field of high-frequency communication, and the method comprises the following steps: obtaining a complex weight signal of each array element in an antenna array under a horizontal polarization channel and a vertical polarization channel, respectively carrying out amplitude response and phase response acquisition and calibration processing on the complex weight signal; performing dynamic extraction and modeling on amplitude errors and phase errors of each array element in different polarization channels; on the basis of error estimation, constructing a machine learning prediction module comprising a time sequence prediction model; performing joint estimation on a real-time error estimation result and a prediction error result; constructing a hardware-software collaborative calibration structure comprising a dynamic gain control module on the basis of the compensation weight; beam focusing of the target space area is realized; according to the invention, the hidden problems of beam offset, sidelobe lifting, gain loss and the like caused by inconsistency of polarization channels are solved.

The invention discloses a direct-current system ground fault real-time monitoring method and system, and relates to the field of intelligent power distribution, and the method comprises the steps: collecting the bus voltage, branch current and disturbance response signals of each branch, constructing a fusion abnormal factor in a fixed monitoring window, comprehensively reflecting the voltage change rate, disturbance amplitude response and current vector offset characteristics, and carrying out the real-time monitoring of the ground fault of a direct-current system. And inputting the factor and a disturbance parameter into a nonlinear scoring function together, and outputting a grounding probability confidence score. And for the branch with the scoring result exceeding a set threshold value, the system executes bypass closing and main branch opening operation, voltage and current derivative data are collected in a recovery window, the voltage drop recovery rate is calculated, and whether an actual grounding point is formed or not is judged. And if the fault is confirmed to be true, the isolation state is maintained, and branch reset operation is completed through a recovery criterion and a manual permission mechanism in a subsequent period. The method has better effects in real-time performance, accuracy and safety.

A method and system for bandwidth extension of a critical sampling circuit, belonging to the field of signal sampling technology. The implementation method is as follows: S1, estimating the model coefficients of the squared amplitude response of the simulated channel of the critical sampling circuit through ultra-relaxed primordial duality, constructing the simulated channel response matrix, and obtaining the system response matrix by row decimation; S2, establishing the high-dimensional response matrix of the critical sampling circuit and completing parameter initialization; S3, performing iterative calculation of the extension features through elastic network regression, checking the convergence of the extension residual or the number of iterations, if satisfied, proceeding to S4, otherwise continuing iteration; S4, reconstructing the high-dimensional signal using the extension features calculated in S3, and obtaining the reconstructed signal after bandwidth extension of the critical sampling circuit through sampling rate conversion. This invention, by iteratively calculating the spectral characteristics within the target extended bandwidth of the critical sampling circuit, can recover out-of-band lost spectral information without increasing the sampling clock frequency and analog input bandwidth, achieving low-cost high-frequency signal sampling.

The invention discloses a pedestal pan mute control method and device and a pedestal pan, and relates to the technical field of pedestal pan control, and the method comprises the following steps: in response to a mute signal, calculating a mute amplitude coefficient according to the current state data of the pedestal pan; according to the mute amplitude coefficient and the initial action amplitude of the pedestal pan, the mute action amplitude of the pedestal pan is obtained; and in response to the control signal, executing a toilet action corresponding to the control signal according to the toilet mute action range. The method has the beneficial effects that the mute amplitude coefficient is calculated according to the current state data of the pedestal pan, so that the mute amplitude is changed along with the change of the using state, the cover opening state and other states of the pedestal pan, and thus actions of different amplitudes are executed in different states of the pedestal pan; and therefore, a higher cleaning effect can be achieved under the condition of being used by people for a long time, and both the cleaning effect and the mute effect are achieved.

Various current measurement systems and methods of signal processing are disclosed. In one example, there is a current measurement system that includes a filter with a corner frequency within the operating frequency range of the current measurement system. This provides a system with good SNR, whilst also preventing or reducing the likelihood of output saturation during large di / dt spikes. The system further includes an equaliser arranged to compensate for the phase and / or magnitude response of the filter within the operating frequency range.

The embodiment of the invention provides a parameter determination method and device, electronic equipment, a chip and a medium, and relates to the technical field of audio signal processing, and the method comprises the steps: obtaining first amplitude response data corresponding to a first processing unit in a plurality of processing units of a signal processing device; based on the first amplitude response data corresponding to the first processing unit, respectively determining weights of a plurality of processing units of the signal processing device; and determining a first target gain of the first processing unit based on the weight and an initial gain of the signal processing device, the first target gain being used for determining a first frequency response control parameter corresponding to the first processing unit. According to the method provided by the invention, the gain of each processing unit is automatically calibrated by using iterative computation, so that the accurate control of interaction between the processing units in amplitude-frequency response is realized, the overall precision of the signal processing device is improved, the gain adjustment and the improvement of the signal processing efficiency are further realized, and the accuracy of the signal processing device is improved. And the manual debugging cost is reduced.

The invention discloses a shallow lake turbidity remote sensing inversion method and system based on wind drive physical constraint, and the method comprises the steps: constructing a time sequence pairing sample through combining a remote sensing image and actually measured data, and extracting wind drive characteristics such as wind speed, wind stress and strong wind duration; establishing direction consistency priori by using monotone calibration to generate an expected direction signal, and constructing a wind-driven amplitude response surface interpolation to obtain an expected change amplitude; in model training, a double-moment regression network sharing weights is adopted, and an actual measurement supervision error and wind-driven physical constraints are jointly optimized; and finally, carrying out pixel-level reasoning and verification on the multi-temporal remote sensing image to realize continuous estimation of spatial distribution and dynamic change of turbidity. According to the method, a double-moment input and shared weight network structure is introduced, the physical mechanism and deep learning advantages are fused, the time sequence continuity, the physical interpretability and the cross-space-time generalization ability are remarkably improved while high inversion precision is kept, and an efficient and reliable technical approach is provided for water environment remote sensing monitoring.

An antenna tuner receives outputs of detectors coupled to an input and / or an output of each power amplifier (PA) of a plurality of PAs of a multiple antenna system. A processor of the antenna tuner is configured to process the detector outputs and to generate at least one of a gm gate bias value and a cascode gate bias value to be applied to gm and cascode gates, respectively, of a last stage of each of the PAs to change the shape of an input amplitude-to-output amplitude (AM-AM) response of each of the PAs independently of one another. The processor can also be configured to process the detector outputs to generate a varactor bias value to be applied to a terminal of a varactor of each of the PAs to change the shape of an input amplitude-to-output phase shift (AM-PM) response of each of the PAs independently of one another.

The invention relates to an ultrahigh frequency sensor sensitivity checking system and method based on program control analog pulses, and belongs to the technical field of power equipment detection. The system comprises an analog pulse generation device which outputs a program-controlled pulse sequence with controlled parameters including pulse amplitude, width, rise time and oscillation frequency to a transformer; the ultrahigh-frequency sensor to be detected detects a program-controlled pulse sequence induced by the transformer and outputs a detection pulse sequence corresponding to the program-controlled pulse sequence; the sensitivity checking unit is respectively connected with the analog pulse generation device and the ultrahigh frequency sensor to be detected, and is used for receiving and analyzing the amplitude-frequency characteristics of the program-controlled pulse sequence and the detection pulse sequence; and determining the minimum detection sensitivity of the to-be-checked ultrahigh frequency sensor through amplitude response characteristic analysis, and determining the detection frequency band range of the to-be-checked ultrahigh frequency sensor through frequency response characteristic analysis. According to the invention, flexible and accurate verification of the sensitivity of the ultrahigh frequency sensor is realized.

The invention relates to the technical field of power equipment state evaluation, and discloses a three-phase transformer state evaluation method, system, equipment and medium, and the method comprises the steps: collecting the frequency-amplitude response data of each phase winding of a three-phase transformer; dividing at least two characteristic sensitive frequency bands, wherein the frequency bands respectively correspond to core components of the transformer; extracting difference characterization characteristic parameters of each phase and each frequency band, and calculating a three-phase imbalance coefficient; and generating a dynamic threshold value based on the operation condition of the transformer and historical data, performing multi-level state evaluation in combination with the deviation degree of the unbalance coefficient and the threshold value, and positioning an abnormal phase. The method breaks through the limitation of a traditional fixed threshold value and a single feature, adapts to different operation scenes through the dynamic threshold value, expands feature parameter types and frequency band configuration flexibility, achieves state accurate grading and anomaly tracing, solves the problems that a traditional method is poor in adaptability and narrow in protection range, and remarkably improves the evaluation universality and the intelligent level.

The present invention relates to an online monitoring method for the cable status of a variable frequency motor based on the switching oscillation damping characteristic, comprising: collecting the high-frequency switching oscillation current of the variable frequency motor; extracting a differential-mode switching oscillation signal from the high-frequency switching oscillation current; performing frequency domain analysis on the differential-mode switching oscillation signal to obtain a spectrum, and further extracting the damping characteristic of the high-frequency differential-mode switching oscillation; and calculating a corresponding insulation degradation index based on the extracted damping characteristic, thereby determining the cable insulation degradation status monitoring result. Compared with the prior art, the present invention fully utilizes the high-frequency switching oscillation response generated by the rapid switching of the power devices of the variable frequency motor itself. Based on the characteristics that the participation factor of the high-frequency differential-mode oscillation is independent of stray capacitance and its amplitude response is more significant, the damping characteristic of the differential-mode switching oscillation is used as a characteristic parameter for cable insulation status monitoring, thereby online monitoring the cable insulation status, with the advantages of high sensitivity, accuracy, reliability, and good robustness.

A dynamically controllable metasurface antenna system is disclosed. The system comprises: a metasurface comprising a plurality of electronically addressable meta-atoms, each meta-atom comprising an integrated electronic component configured to control a local phase and / or amplitude response in response to an applied bias; a feed configured to launch surface waves onto the metasurface; and a control circuit operatively coupled to the plurality of meta-atoms and configured to selectively bias individual meta-atoms to dynamically control at least one of frequency response, beam direction, or polarization state of the antenna system in real time.

The invention belongs to the technical field of material mechanical property testing, and discloses a dynamic Young modulus measuring method and device based on a frequency sweeping mode. The method comprises the following steps: carrying out sweep frequency excitation on a standard test rod through a non-contact vibration exciter to enable the standard test rod to generate bending vibration; synchronously acquiring vibration response data in a non-contact manner by adopting a laser vibration meter, and performing spectrum analysis through a signal acquisition and processing system to obtain an amplitude response spectrum; identifying at least one harmonic peak of bending vibration from the frequency spectrum, and accurately acquiring a corresponding resonant frequency; and dynamically calculating the Young modulus of the material according to the measured resonant frequency in combination with the geometric and physical parameters of the test rod and the corresponding vibration mode. According to the invention, non-contact excitation and measurement, a sweep frequency mode and an accurate spectrum analysis technology are combined, additional mass and rigidity errors introduced by contact measurement can be avoided, and the method has the advantages of high measurement precision, high speed, good repeatability, huge automation potential and the like.

The invention relates to the field of radar array signal processing, in particular to a space-time joint domain beam forming method in a fast moving target scene. Firstly, a sensor array is constructed, initialization parameters including array configuration parameters, incident angles of target echo signals and interference signals, Doppler frequency shifts and the like are set, and a space-time two-dimensional steering vector model is established; combining the model, determining a beam amplitude response constraint condition according to an incident angle and a Doppler frequency shift range of a target echo signal, and constructing a space-time two-dimensional robust beam forming model based on a minimum output power criterion; obtaining a covariance matrix of the low-sample echo data, and reconstructing the covariance matrix after eigenvalue decomposition and eigenvalue compensation; and finally, a space-time adaptive processing model is constructed based on the reconstruction matrix, an initial weight vector is obtained through relaxation non-convex constraint, and a final weight vector is obtained through phase compensation iterative optimization until conditions are met, so that the robustness and accuracy of beam forming in the case of low sample data in a fast moving target scene can be improved.

The application discloses a scalable multi-array towed electromagnetic coil structure and a working method, and belongs to the field of towed transient electromagnetic detection equipment. The structure adopts a multi-array modular array design, one transmitting array element and two receiving array elements on the two sides of the transmitting array element form a modular working unit, and the compact connection of the array is realized by the common use of the receiving array elements of adjacent working units. The horizontal offset distance and the vertical distance between the transmitting array element and the receiving array element are constrained, the mutual inductance coefficient in the working unit approaches to zero, the primary field residual interference is suppressed at the physical level, and the shallow detection blind area is eliminated. Time division multiplexing technology is adopted to realize multi-unit round transmission and multi-channel signal synchronous acquisition, a spatial amplitude response matrix is constructed, and the accurate positioning of the center position and the geometric boundary of an underground abnormal body is realized. The application supports horizontal modular seamless expansion, significantly improves the scanning width and the detection efficiency, and can provide rich data basis for high-quality inversion of the underground abnormal body.

The application discloses a channel response related noise shaping method based on a pre-equalization DMT transmission system, comprising the following steps: S1: considering the influence of a channel, minimizing the difference between a sending signal and a receiving signal, and obtaining optimal feedback filter coefficients; and S2: using the optimal feedback filter coefficients to generate a quantized output signal, wherein the quantized output signal is used to be loaded into a low-quantization digital-to-analog converter to generate an analog signal. ‑1 The application considers the influence of a channel response in the process of obtaining tap coefficients of a feedback filter, and the weighting coefficient changes with the change of the channel H, so that the amplitude response abs|1+G| of the feedback filter changes with the inverse channel response H Changes are made, and unbalanced damage caused by residual quantization noise is effectively avoided. In addition, most of the residual quantization noise is concentrated in the high-frequency part of the signal, so that the residual quantization noise is further attenuated after transmission through the channel, and the SQNR is improved.

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A hybrid MIMO system includes N digital transceiver chains and N analog beamformers, each analog beamformer coupled to one of the digital transceiver chains and including M analog TX chains and M analog RX chains. One of the simulated RX chains is an RX reference node, and one of the simulated TX chains is a TX reference node. For each beamformer, the processor measures TX and RX phase responses and TX and RX amplitude responses of TX and RX reference nodes, respectively, using a transceiver chain and a calibration transceiver; determining a reciprocity calibration based on a phase difference between the TX and RX phase responses and an amplitude difference between the TX and RX amplitude responses; and applying a reciprocity calibration to the stored beam definition to correct the phase and amplitude difference.

A system includes one or more computing devices that encode spatial perceptual cues into a monaural channel to generate a plurality of output channels. A computing device determines a target amplitude response for the mid and side channels of the plurality of output channels, defining a spatial perceptual associated with one or more frequency-dependent phase shifts. The computing device determines a transfer function of a single-input, multi-output allpass filter based on the target amplitude response and determines coefficients of the allpass filter based on the transfer function, and processes the monaural channel with the coefficients of the allpass filter to generate the plurality of channels having the encoded spatial perceptual cues. The allpass filter is configured to be colorless with respect to the individual output channels, allowing for the placement of spatial cues into the audio stream to be decoupled from the overall coloration of the audio.

The embodiment of the application provides a kind of automation test control method and system of multi-channel amplitude-phase amplification module, belong to electronic test technical field.The method comprises: obtaining the amplitude response data and the phase response data of each channel in multi-channel amplitude-phase amplification module under preset test excitation condition, and constructs channel reference parameter set;Sequence influence model is constructed, and the test execution order of each channel is optimized;The amplitude-phase test is executed to each channel, the amplitude response data and the phase response data of each channel at current time are obtained, and virtual reference channel parameter is constructed;The amplitude response data and the phase response data of each channel are corrected in consistency, and the corrected amplitude-phase parameter of each channel is obtained, and the amplitude-phase test result corresponding to each channel is generated based on corrected amplitude-phase parameter.The application scheme realizes the unified alignment and error suppression of multi-channel amplitude-phase test result, improves test consistency and stability.

The invention provides a bandwidth equalization system and method based on ADC analog bandwidth insufficiency, relates to the technical field of signal processing, and solves the problem that an existing scheme is difficult to deal with limitation of ADC analog bandwidth insufficiency. The system comprises a radio frequency antenna, a radio frequency switch, a frequency conversion channel, an ADC, a time-frequency conversion module and a bandwidth equalization module which are connected in sequence, and further comprises a control module which is connected with the radio frequency switch, the frequency conversion channel, the time-frequency conversion module and the bandwidth equalization module. And the control module is used for receiving the time-frequency data input from the time-frequency conversion module, determining an equalization factor corresponding to each discrete frequency point according to the time-frequency data, and issuing the equalization factor to the bandwidth equalization module, so that the bandwidth equalization process is carried out based on the equalization factor, and the compensation correction of the full-frequency-point amplitude response in the bandwidth range is completed. According to the invention, the channel bandwidth is expanded by adopting a digital frequency domain equalization method, the analog input bandwidth is effectively improved, and the influence of insufficient analog input bandwidth is reduced.

A correction device (100) for a multi-channel time-interleaved ADC system (300) is disclosed. The correction device (100) is configured to correct amplitude response mismatch errors of an ADC output sequence v using a first time-varying function B and further to correct phase response mismatch errors of the ADC output sequence using a second time-varying function C. Thus, due to the use of the first time-varying function B and the second time-varying function C, low complexity converter performance is improved.

The invention provides a test method and test equipment for a vacuum packaging electric field sensor, and the method comprises the steps: placing the electric field sensor in a tool part, processing a sweep frequency signal inputted by the tool part, and outputting an amplitude signal; analyzing the amplitude signal according to a preset condition, summarizing a plurality of obtained amplitude response values into an amplitude response value set, and drawing a waveform image; analyzing a wave crest interval amplitude signal obtained from the waveform image according to a preset condition, summarizing a plurality of obtained detail amplitude response values into a detail amplitude response value set, and drawing a detail waveform image; and determining a resonant frequency value and a pass band width value according to the detail waveform image and the detail amplitude response value set, and obtaining a quality factor value of the electric field sensor. According to the invention, the data volume of the analysis amplitude signal can be effectively reduced, and the resonant frequency value, the pass band width value and the quality factor value of the electric field sensor can be conveniently determined through the wave crest interval image.