7 results about "Amplitude frequency response" patented technology

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.

The invention relates to the technical field of micro electro mechanical systems, and discloses a pressure monitoring device and method based on a nonlinear micro electro mechanical system resonator, the device comprises a pressure switch, a frequency-adjustable signal source, a signal amplification module and a signal analysis module, the output end of the frequency-adjustable signal source is connected with a driving electrode, and the output end of the frequency-adjustable signal source is connected with the driving electrode. The driving electrode is used for applying an alternating current driving signal with adjustable frequency to the driving electrode; the input end of the signal amplification module is connected with the induction electrode, and the signal amplification module is used for converting the mechanical vibration of the cantilever beam into an amplified electric signal; the input end of the signal analysis module is connected with the output end of the signal amplification module, and the signal analysis module is used for monitoring the amplitude-frequency response characteristic of the cantilever beam in real time, recognizing a critical pressure threshold value according to an amplitude jump point and outputting a binary switching state signal. The device is simple in structure, suitable for high vacuum, and stable and reliable in pressure monitoring.

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 an anisotropy investigation method and device, electronic equipment and storage medium, and relates to the technical field of oil seismic exploration. The method comprises the following steps: acquiring excitation parameters of longitudinal and transverse waves excited by a controllable source, determining an observation direction and a single-side receiving arrangement length of seismic exploration, and determining a layout azimuth angle and a number of the receiving arrangement; a transverse wave controllable source is sequentially excited along the direction of the arrangement according to a determined number and times of excitation stations, an azimuth angle of transverse wave source excitation is recorded, a longitudinal wave controllable source is excited along an arbitrary direction, and the receiving arrangement receives all; and seismic data processing software compares and analyzes receiving data of the receiving arrangement, processes the receiving data, and draws an anisotropy plane graph of seismic waves. The application determines a change trend of amplitude frequency response characteristics of different azimuth single-shot records excited by a transverse wave source, and investigates a method for investigating anisotropy of seismic wave amplitude frequency response of a stratum.

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 application provides a sound source positioning method, system, device and program product. The method comprises: collecting multiple initial audio signals of a microphone array, the microphone array comprising multiple array-arranged microphones; performing filtering processing on each initial audio signal corresponding to each microphone by using a corresponding IIR filter and a corresponding all-pass phase compensation filter to obtain multiple filtered audio signals; wherein the IIR filter is configured to compensate for amplitude frequency response differences of the multiple microphones, and the all-pass phase compensation filter is configured to compensate for nonlinear phase distortion of the corresponding IIR filter; and determining sound source position information in a space where the microphone array is located based on the multiple filtered audio signals. The application solves the problem of frequency response differences caused by hardware differences of multiple microphones in a microphone array, and improves robustness.

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.