1048 results about "Low frequency band" patented technology

The invention provides an aero-engine state monitoring method and device based on sound and vibration fusion and a computer readable storage medium, and relates to the technical field of aero-engine state monitoring. The method comprises the following steps: acquiring signals respectively acquired by a vibration sensor and a sound sensor; respectively intercepting a vibration signal low-frequency component and a sound signal high-frequency component based on the frequency response characteristic difference of the sensor; performing normalization processing on the intercepted signal to eliminate amplitude difference; constructing a transition region through an interpolation method, and splicing the continuous mixed frequency spectrum to obtain a sound-vibration fusion spectrum; and establishing a health benchmark based on the normal state fusion spectrum, and realizing abnormity monitoring and alarm through characteristic difference analysis. Advantages and characteristics of a low-frequency band of the vibration sensor and a high-frequency band of the sound sensor are fully utilized, frequency response limitation of a traditional single sensor is broken through, deep fusion of sound and vibration signals is achieved, the effective detection frequency range is remarkably widened, and accuracy and robustness of recognition of early faults such as aero-engine blade breakage are improved.

The invention relates to the technical field of atmosphere lamp control, and discloses an audio analysis control method of a pickup atmosphere lamp and an atmosphere lamp thereof.The audio analysis control method of the pickup atmosphere lamp comprises the steps that the atmosphere lamp collects sound through a built-in sound receiving part, and the sound collected by the sound receiving part comprises music, music, music, music, music and the like; the sound is analyzed and processed through audio analysis, the audio analysis comprises sound preprocessing, the preprocessed sound is subjected to time domain feature extraction and frequency domain feature extraction to obtain the energy ratio of each frequency band of the sound, and each frequency band comprises a high-energy frequency band and a low-energy frequency band; and performing moving average filtering on the low-frequency-band energy to generate an energy envelope line. According to the invention, collected music signals are processed in real time through audio analysis, and information such as rhythm, frequency and intensity of music is extracted. The audio analysis technology ensures that light can be highly synchronized with music, and the user experience is improved.

The invention discloses a data exchange method and system for low-frequency-band wireless networking, particularly relates to the technical field of wireless networking communication, and is used for solving the problem that the data exchange efficiency of the low-frequency-band wireless networking is low. Information correction is carried out by selecting the optimal transmission path and combining feedback of the adjacent nodes, the stability and accuracy of data transmission are improved, the nodes evaluate the information state according to the information receiving quality and the environment change and select a proper correction strategy, and in the path transmission process, real-time error evaluation is used for calculating the error metric of each path, so that the accuracy of data transmission is improved. And according to the selected correction strategy, in combination with a forward error correction and automatic retransmission mechanism, error control is performed when the path quality becomes poor, and the path and the correction strategy are dynamically adjusted in low-frequency-band wireless networking, so that the fault-tolerant capability and the robustness of the network are improved, and transmission errors caused by signal attenuation or interference are effectively reduced. The reliability of data transmission is enhanced, the system adapts to a complex wireless environment, and the risk of information loss and misinformation transmission is reduced.

The invention discloses a broadband oscillation identification method and system based on a multi-band Nyquist criterion, and the method comprises the steps: dividing the frequency of broadband oscillation into a low frequency band, a middle frequency band and a high frequency band with overlapped frequency bands, and obtaining the oscillation signals of a monitoring node in a power grid in different frequency bands; respectively calculating the equivalent impedance of the non-overlapped frequency band of each frequency band and the equivalent impedance of the overlapped frequency band in the two adjacent frequency bands so as to construct the equivalent impedance of the low frequency band, the middle frequency band and the high frequency band with the overlapped frequency bands; establishing a Nyquist criterion of each frequency band based on a transfer function of dynamic characteristics of each frequency band in an open-loop state of the system; a generalized Nyquist criterion of the overlapped frequency bands is constructed by using the multi-frequency-band coupling matrix; constructing a comprehensive decision function according to the recognition result of the generalized Nyquist criterion on the system stability, the broadband oscillation comprehensive characteristic quantity and the change rate of the high-frequency-band impedance module value along with the frequency; and according to the value of the comprehensive decision function and a threshold value, a broadband oscillation identification result is determined, and the broadband oscillation identification capability is improved.

The invention discloses a liquid crystal display screen gray scale control method based on adaptive brightness compensation, which relates to the technical field of liquid crystal display screen control, and comprises the following steps: collecting environmental spectrum distribution information and a pixel gray scale voltage response curve of a liquid crystal display screen in real time, and carrying out fusion processing to form a time sequence joint feature vector; through multi-mode synchronous sampling and time sequence joint feature vector generation, ambient light and screen content changes are accurately captured, target adjustment values of backlight power and gray scale voltage are dynamically predicted, and response lag and overshoot are avoided. Through spectral domain balancing and a self-adaptive damping scheduling mechanism, cooperative control of backlight and gray scale is optimized, high-frequency oscillation is suppressed, and linear response of a low-frequency band is ensured. Meanwhile, Gamma mapping and global color gamut calibration are dynamically refreshed, accurate adjustment of area-level brightness and gray scale is achieved, and continuity of the display effect and visual experience of a user are improved.

The invention discloses a frequency division control radio frequency power supply solid-state impedance matcher and a method thereof, and aims to solve the problems that a traditional mechanical impedance matcher is slow in response, low in adjustment precision and difficult to adapt to a dynamic load. According to the system, an all-solid-state impedance matcher is adopted, impedance dynamic adjustment is achieved through a matching network composed of an adjustable inductance module and a switched capacitor module, closed-loop control is constructed in combination with a radio frequency signal detection module and a digital signal processor, and a frequency division control strategy is adopted, and the high-frequency band realizes high-precision matching through a control strategy of coarse adjustment of the adjustable inductance module and fine adjustment of the switched capacitor module. The device has the advantages of high response speed, wide frequency band coverage and the like, and is particularly suitable for industrial plasma application scenes with remarkable dynamic impedance characteristics.

The present invention discloses a high polarization isolation dual-polarization tightly coupled ultra-wideband phased array antenna. It includes a dipole unit, a coaxial feed line, a metal reflective floor, a fishbone cross-shaped patch and a cross-shaped metal wall; the dipole unit includes a horizontal and two vertical dielectric substrates, and the vertical dielectric substrates are orthogonal to each other; two groups of coplanar and mutually perpendicular butterfly-shaped dipole units are printed on the lower surface of the horizontal dielectric substrate; a fishbone cross-shaped patch is embedded at the intersection of the ends of the dipole units, and there is a gap between the patch and the end of the dipole; a patch with an etched groove line is printed on one side of the vertical dielectric substrate; the patch is connected to the dipole; the microstrip line on the upper surface of the horizontal dielectric substrate is connected to the inner conductor of the coaxial feed line, and the dipole is connected to the outer conductor of the coaxial feed line; the fishbone cross-shaped patch is in contact with the cross-shaped metal wall. The present invention realizes high polarization isolation and low cross-polarization of the dual-polarization tightly coupled ultra-wideband phased array in a lower frequency band without the need for a complex feeding network.

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

The invention provides an adaptive coordination method for dynamic droop parameters of heterogeneous battery modules, which comprises the following steps of: identifying transfer function parameters of each heterogeneous module in real time, and solving the problem of pole alignment of different orders of systems by adopting a virtual pole supplementation technology; based on a modal decoupling theory, decomposing a multi-objective optimization problem into three independent sub-problems of low-frequency-band SOC equalization, middle-frequency-band power regulation and high-frequency-band transient suppression; multi-band parallel gradient projection optimization is realized through a pre-calculation constraint feasible region and a versioning synchronization mechanism, and thread competition is effectively avoided; and the fusion weight is adaptively adjusted according to the convergence quality of each frequency band, and a coordinated droop parameter is generated. According to the method, the problem that the frequency domain response of the heterogeneous battery module is not matched is fundamentally solved, the technical breakthrough from static pole assignment to dynamic adaptive adjustment is realized, and the stability and efficiency of the heterogeneous energy storage system are improved.

An electronic device performs sub-band decomposition on a to-be-coded audio to obtain a to-be-coded low frequency signal corresponding to a low frequency band and a to-be-coded high frequency signal corresponding to a high frequency band. The device performs compression coding on the to-be-coded low frequency signal to obtain low frequency coded data of the to-be-coded low frequency signal. The device determines high frequency prediction information according to the to-be-coded low frequency signal. The device performs feature extraction on the to-be-coded high frequency signal to obtain high frequency feature information. The device determines high frequency compensation information of the to-be-coded high frequency signal according to a difference between the high frequency feature information and the high frequency prediction information. The device also performs encapsulation processing on the low frequency coded data and the high frequency compensation information to obtain audio coded data of the to-be-coded audio.

The invention discloses a near-fault broadband strong vibration simulation method, which comprises the following steps: S1, data collection and preprocessing: collecting a small vibration record in a research area as a source of an empirical Green function, and simultaneously obtaining information such as a geologic structure and stratum parameters of the area for model construction of a discrete wave number method; s2, correcting an empirical Green function, and selecting records similar to a target earthquake focus mechanism from the collected small earthquake records; and S3, calculating based on a geological structure and stratum parameters of a research area by using a discrete wavenumber method. According to the near-fault broadband strong vibration simulation method, the advantages of the two methods are fused, the description of the discrete wave number method on the medium structure at the low frequency band is accurate, the corrected empirical Green function can consider more actual factors at the high frequency band, accurate simulation of the broadband is achieved, and small vibration records are used as the empirical Green function, so that the simulation accuracy of the near-fault broadband strong vibration simulation method is improved. And information such as a real field effect is included, so that a simulation result is closer to an actual seismic oscillation condition.

A device may include a radome. A device may include a spacer coupled to the radome. A device may include a first antenna element formed on a first printed circuit board (PCB) and configured to be housed by the radome, wherein the first antenna element is a multi-band antenna element comprising: one or more low-band radiating elements, one or more mid-band radiating elements; and one or more high-band radiating elements. A device may include a second antenna element formed on a second PCB and configured to be housed by the radome, the second antenna element comprising one or more WiFi antenna elements. A device may include a third antenna element formed on a third PCB and configured to be housed by the radome, the third antenna element comprising one or more global positioning system (GPS) antenna elements.

The invention relates to the technical field of physical health data analysis, in particular to a teenager physical training method and system based on data analysis, and the method comprises the following steps: dividing a load signal into a low-frequency band, a bandwidth frequency band and a high-frequency band based on the load intensity data in teenager training, analyzing the long-term change trend and fluctuation range of the load of the low-frequency band, and calculating the long-term change trend of the load of the high-frequency band; stability parameters are calculated in combination with bandwidth frequency band signal fluctuation, the high-frequency-band short-time load change rate and change rate distribution are analyzed, and a frequency band distribution parameter set is obtained. According to the invention, through load signal multi-band decomposition and parameterization processing, independent calculation and comprehensive analysis of load characteristics are realized, the dynamic change capture capability is enhanced, and through association of cumulative load and time distribution characteristics, dynamic interaction data support is provided, and load risk points and distribution areas are accurately identified. The intensity, time and frequency adjustment strategies are optimized, load balance and action coordination are achieved, overload and deviation risks are reduced, and the scientificity and controllability of teenager training are improved.

An antenna assembly may include at least two PCB bases. Each PCB base may include a first multi-band antenna element, and a second multi-band antenna element, formed on each PCB base. The first multi-band antenna element and the second multi-band antenna elements can include one or more low-band radiating elements, one or more mid-band radiating elements; and one or more high-band radiating elements.

The invention relates to the technical field of electric energy meters, in particular to an intelligent electric energy meter with a power saving function. A communication module; the power supply module generates power according to the temperature difference between the surface temperature of the electric energy meter chip and the air temperature in the electric energy meter so as to provide electric energy for the communication module; and the control module is used for respectively adjusting the monitoring sampling mode of the detection module from a low-frequency sampling mode to a low-frequency full-frequency composite sampling mode according to the fluctuation ratio of the electrical load, and adjusting the data transmission mode of the communication module from a periodic transmission mode to an encrypted transmission mode based on the power generation voltage ripple of the power supply module. The signal transmission frequency band of the communication module is adjusted to be a low frequency band; wherein the alternating transmission frequency of single transmission of the periodic transmission mode is determined according to the average power generation voltage of the power supply module. The working stability of the electric energy meter is improved.

The invention relates to a seismic frequency broadening method, system, equipment and medium for seismic frequency division and inverse Q filtering, and the method comprises the steps: carrying out the spectrum analysis of post-stack seismic data, and decomposing the original post-stack seismic data of a target interval into frequency division data bodies of different frequency bands through generalized S transformation; based on the deep logging curve, a Q value curve is obtained through estimation by means of a preset Q value fitting formula; establishing a three-dimensional Q-value data volume by using the Q-value curve obtained by fitting and combining a seismic interpretation result; on the basis of the three-dimensional Q-value data volume, performing inverse Q filtering processing on the obtained frequency division data volumes of the medium and high frequency bands, and combining the frequency division data volumes of the medium and high frequency bands after inverse Q filtering processing with the frequency division data volumes of the low frequency bands; and based on the combined post-stack seismic data volume, carrying out seismic frequency expansion by taking an artificially synthesized seismic record as quality control, and carrying out seismic interpretation and sedimentary unit fine description. The method can be widely applied to the technical field of oil-gas exploration and development.

A multi-band antenna includes a reflector that provides a ground plane, a first array of first radiating elements, each of the first radiating elements located on a front side of the reflector and configured to emit first electromagnetic radiation in a low frequency band, a second array of second radiating elements, each of the second radiating elements located on the front side of the reflector and configured to emit second electromagnetic radiation in a high frequency band, and an artificial magnetic conductor (AMC) plane that is located between the reflector and a radiator of the first radiating element and between the reflector and a radiator of the second radiating element. The AMC plane is configured to reflect the first electromagnetic radiation substantially in phase and to reflect the second electromagnetic radiation substantially in antiphase.

The invention discloses a cooperative control method and system for noise reduction and fire prevention of a transformer substation. The method comprises the following steps: determining the acoustic impedance mutation degree of an original composite board according to the frequency and amplitude distribution of target low-frequency noise of the transformer substation; when the acoustic impedance abrupt change degree exceeds an abrupt change threshold value, optimizing a first physical parameter of the original composite board; the heat flow density of the first composite board obtained through optimization is obtained, and if the heat flow density exceeds a fireproof threshold value, a second physical parameter of the first composite board is optimized; obtaining a noise penetration index of the target low-frequency-band noise in the second composite board obtained through optimization, and if the noise penetration index does not exceed a penetration threshold value, optimizing a third physical parameter of the second composite board; and determining final physical parameters corresponding to the acoustic-thermal performance balance point according to the acoustic impedance distribution and the thermal conductivity distribution of the third composite board obtained through optimization so as to adjust the structure of the third composite board. According to the invention, collaborative optimization of sound absorption frequency band characteristics and fireproof performance can be realized, and both noise reduction and fire prevention can reach an ideal state at the same time.

A Wi-Fi controller receives AP scan reports and station scan reports from a plurality of Wi-Fi 7 access points servicing a plurality of stations for wireless access to the data communication network. Each Wi-Fi 7 access point has multiple links being monitored across 2.4 GHz, 5 GHz and 6 GHz. A global link utilization table of station versus channel utilization is generated from the access point reports and station scan reports. A threshold of channel utilization on the first link of the first Wi-Fi 7 access point being exceeded is detected, while also detecting multicast traffic on the first link and detecting that the first Wi-Fi 7 station is Wi-Fi 7 capable. Responsive to the detections, multicast traffic is steered from the to the first link (e.g., higher frequency band and / or higher channel bandwidth) to the second link (e.g., lower frequency band and / or lower channel bandwidth), including steering multicast traffic from a second application on the first Wi-Fi 7 station to the second link.

The invention provides a motor multi-band vibration suppression method and a motor multi-band vibration suppression device based on electromagnetic-mechanical cooperative regulation and control. According to the method, vibration signals are collected in real time, and spectral analysis is carried out to identify vibration frequency distribution; dividing the vibration signal into a low-frequency band, a middle-frequency band and a high-frequency band according to a spectral analysis result, and respectively corresponding to a mechanical vibration source, an electromagnetic excitation source and a structural noise source; a control strategy is dynamically selected based on a vibration frequency band, a low-frequency band triggers a mechanical regulation and control module to output a reverse force to perform vibration suppression, a middle-frequency band triggers an electromagnetic control module to optimize a current waveform and a PWM modulation mode, and a high-frequency band starts a cooperative control strategy of the electromagnetic and mechanical control module; through real-time communication between the controller and each module, vibration feedback signals are continuously monitored, and control parameters are dynamically adjusted according to working condition changes so as to maintain the vibration suppression effect. According to the invention, through cooperative adjustment of electromagnetic control and a mechanical structure, active suppression of vibration of the motor in multiple frequency bands is realized.

The invention relates to a power battery and energy storage battery health state prediction method and system, and the method comprises the following steps: S1, obtaining original EIS data through an open source data set, extracting the center position, radius and arc length of a medium-high frequency Nyquist diagram arc, and extracting the length of a low-frequency Nyquist diagram as health features, and obtaining a training set; step S2, constructing a DGPR model; inputting the training set into the DGPR for training, selecting a kernel function, training to obtain a hyper-parameter, and establishing an accurate battery health state prediction model; and S3, inputting the health features extracted in the test set into the trained health state estimation model, and performing battery health state prediction according to hyper-parameters obtained by training. According to the method, the health features can be extracted by intercepting the EIS frequency band data, the health features are input into the DGPR for training to obtain the hyper-parameters, and the health state of the battery is predicted according to the hyper-parameters.

The invention belongs to the technical field of wireless communication, and particularly relates to a beyond-visual-range wireless communication intelligent rapid link establishing method. According to the invention, through carrying out multi-dimensional analysis on a communication environment and combining a plurality of key links such as a signal coverage blind area, frequency band stability and identity authentication, intelligent and rapid link establishment of beyond-visual-range wireless communication is realized; the optimal communication window period in the future time period can be accurately predicted by collecting and analyzing environmental parameters such as the electromagnetic interference intensity, the obstacle position and the channel quality parameter in the communication environment, so that the influence of the communication blind area on the communication quality is effectively avoided, and the optimal communication window period can be accurately predicted based on the predicted optimal communication window period. According to the method, the spectrum resources are dynamically allocated in the preset micro-interval period, efficient utilization of communication resources is ensured, and meanwhile, the reliability and the stability of communication are further improved by adjusting the occurrence angles of the high-frequency-band signals and the low-frequency-band signals and constructing a cross-frequency-band redundant transmission link.

The invention discloses a noise reduction method and device, equipment, a storage medium and a program product, and relates to the technical field of audio processing, and the method comprises the steps: collecting a bone conduction signal and at least two paths of environment air conduction signals of an earphone wearer through an earphone, based on the bone conduction signal, performing first noise reduction processing on a target air conduction signal of a target direction determined based on the at least two paths of environment air conduction signals to remove a first air conduction component of a relatively low frequency band of an earphone wearer, and obtaining an initial noise-reduced signal; and performing second noise reduction processing on the initial noise-reduced signal based on the bone conduction signal, the at least two paths of environmental air conduction signals and the phase difference of the at least two paths of environmental air conduction signals, so as to remove a second air conduction signal of a higher frequency band of the earphone wearer, and obtain a target noise-reduced signal. According to the method and the device, the noise generated by the earphone wearer in the audio recorded by the earphone is effectively removed.

The invention relates to the technical field of compressors, and provides a liquid accumulator support and a compressor, and the liquid accumulator support comprises a first welding part, a second welding part and a connecting part. Wherein a first groove is formed in the first welding part, and a shell of the compressor can be partially inserted into the first groove, attached to the inner wall of the first groove and fixedly welded to the inner wall of the first groove; a second groove is formed in the second welding part, and the liquid storage device can be partially inserted into the second groove, attached to the inner wall of the second groove and fixedly welded to the inner wall of the second groove; the first welding part and the second welding part are arranged on the two opposite sides of the connecting part and fixedly connected through the connecting part. Thus, the connection rigidity between the shell of the compressor and the liquid storage device is improved, according to the formula # imgabs0 #, f represents frequency, k represents rigidity, and m represents mass, it can be known that when the mass is fixed, the vibration frequency is in direct proportion to the rigidity, and after the connection rigidity is improved, the inherent frequency of the liquid storage device is effectively improved, so that the resonance problem of a low-frequency band is avoided, and the service life of the liquid storage device is prolonged. And the condition of noise generation is improved.

The invention provides a data communication method, electronic equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring a spatio-temporal feature vector corresponding to communication environment data; a target deep learning reinforcement model is adopted to analyze and process the spatial-temporal feature vector to obtain a target frequency band allocation strategy, the target frequency band allocation strategy is used for allocating target spectrum resources during data transmission, and the deep learning reinforcement model is updated through real-time environment feedback data; and performing data transmission on the to-be-transmitted data according to the target frequency band allocation strategy in the multi-frequency-band cooperative communication process to obtain a target transmission result. According to the invention, the technical problems of low spectrum resource utilization efficiency, large inter-band interference and lack of adaptability of a communication strategy in a data communication method provided in the related technology are solved.

The present invention discloses a speaker and electronic device improved with a high-density FER molecular sieve. The rear cavity of the speaker is filled with a high-density FER molecular sieve; the raw powder of the FER molecular sieve has a non-flake micromorphology, a thickness-to-width ratio of ≥1:20 and <1:1, and a loose bulk density greater than 0.15 g / cm 3 The speaker provided by the present invention is filled with a high-density FER molecular sieve with a specific raw powder morphology in the back cavity, which increases the acoustic compliance of the air in the back cavity, thereby improving the performance of the speaker in the low frequency band.

The invention discloses a battery electrochemical impedance spectroscopy detection method and device, and relates to the field of battery state detection. The method comprises the steps that a to-be-tested battery is connected with a test system in a Kelvin mode; determining a specific form of a sampling function according to the low-frequency test frequency band and the internal resistance of the to-be-tested battery so as to obtain a sampling signal; testing the high frequency band of the battery to be tested by adopting a sine frequency sweep excitation method to obtain an impedance spectrum of the high frequency band; controlling the test system to perform excitation test on the low-frequency band of the to-be-tested battery according to the designed sampling signal to obtain an excitation current signal and a response voltage signal of the to-be-tested battery in the low-frequency band, and performing Fourier transform to obtain an impedance spectrum of the low-frequency band; and splicing the impedance spectrum of the high frequency band and the impedance spectrum of the low frequency band to form a complete electrochemical impedance spectrum of the battery to be detected. No matter whether standing test or online measurement is carried out, the test efficiency of the electrochemical impedance spectroscopy of the battery can be remarkably improved, and the test precision can be ensured.

A lower frequency band antenna for a multiband antenna system and an antenna system comprising the lower frequency band antenna and a higher frequency band antenna are disclosed. The multiband antenna system comprises at least one lower frequency band antenna and at least one higher frequency band antenna, the lower frequency band antenna comprising: a substrate mounting a plurality of dipole arms each comprising a plurality of conductive loops, the substrate and dipole arms forming a frequency selective surface predominantly transparent to the higher frequency band and resonating at the lower frequency band. Each of the dipole arms comprises an array of cells, each cell comprising at least one of the plurality of conductive loops configured as an outer conductive cell loop defining an outer periphery of the cell, a size of the outer conductive cell loop determining the higher frequency band that the frequency selective surface is transparent to, and a number of cells in the array determining the lower frequency band that the antenna resonates at.

The invention provides a battery broadband electrochemical impedance spectroscopy time domain rapid detection method and system, and the method comprises the steps: S1, dividing a target signal frequency band into a low frequency band, a middle frequency band and a high frequency band from low to high, and setting the parameters of an excitation signal DIBS of each frequency band; s2, enabling the discrete binary sequence to have spectrum distribution corresponding to the target signal through an optimization algorithm, and obtaining a DIBS signal containing all set frequency points; s3, performing current excitation on the battery by adopting DIBS excitation signals of different frequency bands to obtain excitation current and response voltage; and S4, respectively calculating the frequency spectrums of the excitation current and the response voltage under the three frequency bands, and obtaining the final impedance. A multi-band excitation mode is adopted, the sequence length of a single-segment signal is shortened, the clock period of the single-segment signal is prolonged, and the storage burden of excitation equipment and the data processing complexity of a time-frequency conversion algorithm are effectively prevented from being aggravated due to the long sequence period.

The invention discloses an unmanned aerial vehicle detection direction-finding device capable of full-band detection, and relates to the field of unmanned aerial vehicle detection direction-finding equipment, the unmanned aerial vehicle detection direction-finding device comprises a direction-finding shell, the direction-finding shell is provided with a plurality of direction-finding antenna units along the circumferential direction of the direction-finding shell, each direction-finding antenna unit comprises a rotating unit, a telescopic unit and a direction-finding antenna, and the rotating unit comprises a rotating cylinder. The telescopic unit comprises a deflection cylinder and a multi-stage telescopic cylinder, one end of the deflection cylinder is rotationally connected with the rotating cylinder, one end of the multi-stage telescopic cylinder is slidably connected with the deflection cylinder, the other end of the multi-stage telescopic cylinder is connected with the direction-finding antenna, and the deflection cylinder adjusts the state of the direction-finding antenna and is used for forming a vertical polarization direction-finding state or a horizontal polarization direction-finding state. The rotating axis of the rotating cylinder is perpendicular to the rotating axis of the deflection cylinder, the rotating cylinder is used for adjusting the direction finding angle of the direction finding antenna, four monitoring technologies of low frequency band, high frequency band, vertical polarization and horizontal polarization are achieved through one antenna, and the direction finding antenna can be applied to more complex environments.