200 results about "Interference elimination" patented technology

The invention discloses a GIS partial discharge intelligent diagnosis system and method based on one-dimensional ultrahigh frequency signal analysis, and relates to the technical field of power electrical equipment intelligent monitoring, and the system comprises a signal collection and preprocessing module which is used for collecting ultrahigh frequency signals of GIS equipment and obtaining preprocessed signal data through a dynamic threshold algorithm; the discharge initial judgment module is used for performing multi-dimensional sequential judgment to eliminate interference discharge data so as to obtain effective discharge signal data; the feature extraction module is used for performing time domain kurtosis and pulse width analysis, frequency domain energy distribution analysis and time-frequency domain wavelet entropy calculation based on the multi-dimensional features of GIS partial discharge, and generating an optimized feature subset; and the type identification module is used for identifying the partial discharge type by using the integrated learning model to obtain a diagnosis result. According to the invention, the problem of unstable recognition accuracy caused by insufficient signal preprocessing, single feature representation and single classification algorithm in the prior art is solved.

The invention discloses an unmanned aerial vehicle anti-interference communication link control method based on heterogeneous network convergence, and relates to the technical field of unmanned aerial vehicle anti-interference communication, and the method comprises the steps: S1, interference sensing and network state modeling, S2, intelligent link decision making, S3, spectrum avoidance and resource scheduling, S4, distributed feedback and cooperative anti-interference, and S5, heterogeneous network cooperative relay. S6, resource allocation and energy efficiency optimization; S7, performance evaluation and parameter optimization; and S8, multi-link redundancy backup. According to the invention, through S1, S2 and S7, a sensing, decision-making and optimization closed-loop system is constructed, LSTM interference prediction and three-dimensional network modeling in S1 provide accurate input, a dual deep Q network in S2 realizes low-delay link decision-making, and KPI evaluation and genetic algorithm dynamic parameter adjustment in S7, the signal-to-interference ratio is improved, the anti-interference adaptability is improved compared with a traditional passive response mode, and the method has the advantages that the method is simple and convenient to operate, and the cost is low. The creative breakthrough that interference does not reach strategy precedence is realized; through S3 and S4, an active anti-interference mechanism is formed, and compared with a single avoidance or suppression method, the interference elimination efficiency is improved.

The invention discloses a signal processing method based on deep learning and adaptive filtering fusion. The method comprises the following steps: S1, collecting and preprocessing an original signal; s2, carrying out adaptive filtering; s3, constructing a deep neural network model to perform deep feature extraction on the filtered signal; s4, signal fusion and interference elimination are carried out; S5, a real-time closed-loop feedback mechanism is established, and dynamic parameter adjustment is carried out; s6, performing an end-to-end dynamic optimization process; s7, performing iterative updating and high-confidence sample judgment; and S8, processing a newly collected signal by using the trained adaptive filtering module and the deep neural network model, and generating a reconstructed signal through signal fusion. According to the method, through effective fusion of adaptive filtering and the deep neural network, accurate suppression and high-dimensional feature extraction of a multipath effect, nonlinear noise and transient interference in a complex wireless signal are realized, so that the precision, robustness and real-time performance of signal processing are remarkably improved.

The invention relates to the technical field of learning methods, in particular to an OPGW heterogeneous detection method based on AI interference elimination, which comprises the following steps: acquiring a vibration signal segment, dividing mutation fragments, arranging channel sequence, comparing direction extension, extracting a direction change homing path segment, analyzing an offset trend positioning response area, and extracting fluctuation trend verification interruption. And combining state feature merging numbers, identifying a jump sequence and analyzing a switching relation, and obtaining disturbance boundary features. According to the method, a path chain is constructed through sudden change signal position division and a channel response sequence, a disturbance propagation starting point and an extension direction can be subjected to structured expression, a path segment corresponding to continuous direction change supports limitation of a response interval, a fluctuation trend and direction offset are combined to form segmented reference, and identification of characteristics of boundary evolution along with time is assisted; the hopping sequence in the tail end signal is used for restoring the disturbance boundary and enhancing the trajectory separation and feature retention capability of the multipath interference behavior in the differentiated environment.

The invention discloses an AI-based cooperative communication method and system for dynamic spectrum allocation and interference elimination, and the method comprises the following steps: 1, collecting historical data of power equipment, including power line environment data collected by a sensor and power line data collected by a dual-mode communication module; 2, marking the historical data, and inputting the marked historical data into the AI model for training; 3, predicting communication performance through the trained AI model, and dynamically adjusting spectrum allocation according to a prediction result; and step 4, the AI model analyzes interference signal characteristics in a prediction result, and interference is eliminated for different interference types by adopting a matching algorithm. According to the invention, the AI technology is utilized to dynamically optimize the power and frequency spectrum selection of the HPLC and the HRF under the condition of meeting the upper limit of equipment energy consumption and the upper limit of transmission power of the dual-mode communication module, and the interference in a complex power line environment is eliminated, so that the optimal communication performance is ensured.

The invention discloses a wireless passive bolt pre-tightening force monitoring method and system. The method comprises the steps that bolt deformation, temperature and vibration parameters are collected; optimizing the arrangement positions of the sensors based on physical field simulation and working condition characteristics; eliminating interference by using a dynamic decoupling model, and outputting a corrected pre-tightening force value; and monitoring and evaluating the pre-tightening force state of the bolt group in combination with multi-channel sensing, and outputting a monitoring result. According to the invention, the multi-dimensional sensing unit is combined with the dynamic decoupling algorithm, so that the measurement precision under a complex working condition is remarkably improved, and on the basis of a wireless passive communication technology, the arrangement position of each sensor is determined through physical field simulation, so that the risk of a monitoring blind area caused by unreasonable arrangement is avoided. Besides, by fusing multi-dimensional parameters such as strain, temperature and vibration and constructing a decoupling algorithm, the problem of pre-tightening force measurement deviation caused by multi-interference coupling under complex working conditions is solved, and meanwhile, real-time monitoring and abnormal early warning of the bolt group pre-tightening force are realized.

The invention provides an electromagnetic detection system based on a sea-bottom crawler, belonging to the field of geophysical exploration technology, comprising: a survey vessel, a sea-bottom crawler, a transmitting antenna, a receiving node array, a control chip, and a power supply; the survey vessel is connected to the sea-bottom crawler through a traction rope, and the tail of the sea-bottom crawler is provided with a drag cable, on which the transmitting antenna and the receiving node array are mounted, and both the control chip and the power supply are configured in the integrated electronic cabin of the sea-bottom crawler; the power supply provides electrical energy to the sea-bottom crawler, transmitting antenna, receiving node array, and control chip, and the control chip is electrically connected to the transmitting antenna, the receiving node array, and the power system of the sea-bottom crawler; the control chip is configured to have an electromagnetic detection interference compensation module for performing interference elimination and compensation on reflected waves received by the receiving node array. It solves the technical problem of insufficient detection accuracy in existing technologies.

The invention relates to a narrow-band interference filtering method and device based on an HPLC (High Performance Liquid Chromatography) chip, and belongs to the technical field of power line carrier communication. When pulse processing is carried out on a signal, AGC / DAGC processing is paused if a narrowband interference detection starting signal is detected, a narrowband interference detection module calculates a narrowband interference frequency point by using the signal of which the AGC / DAGC processing is paused, and a filter coefficient used by a narrowband interference elimination module is determined based on the narrowband interference frequency point; and the narrowband interference elimination module carries out narrowband interference elimination processing according to the determined filter coefficient. Wherein the AGC / DAGC processed signal is paused when the signal participating in the calculation of the narrowband interference frequency point is subjected to pulse processing, so that signal fluctuation caused by AGC / DAGC processing is avoided, the calculation accuracy of the narrowband interference frequency point is improved, and the narrowband interference filtering effect is ensured.

The present invention relates to the field of communication and sensing, and specifically to a communication and sensing integrated device based on a seven-core optical fiber interferometer and an application method therefor. The application method comprises: a first beam splitter splitting, into reference light and signal light, a light source emitted by a narrow linewidth laser; performing modulation by means of a first coherent optical transmitter and a second coherent optical transmitter; amplifying the light by means of a first amplifier and a second amplifier, and then enabling the light to pass through a multi-core optical fiber from a fan-in end, and to output from a fan-out end; performing beam splitting by means of a second beam splitter and a third beam splitter, and performing demodulation by means of a first coherent receiver and a second coherent receiver; and finally, a phase-locked loop performing interference elimination on preliminarily-demodulated reference light and preliminarily-demodulated signal light to obtain finally-demodulated reference light and finally-demodulated signal light. The present invention uses a phase-locked loop to further eliminate disturbance noise of reference light and signal light. Therefore, noise interference is eliminated in continuous low-frequency detection, thereby improving the communication and sensing effect.

The invention discloses a small current grounding system single-phase grounding fault line selection method and system based on wavelet packet decomposition and comprehensive criteria, and belongs to the technical field of power system relay protection and fault diagnosis. Comprising the following steps: signal acquisition and preprocessing: acquiring bus zero-sequence voltage and each outgoing line zero-sequence current signal, and carrying out filtering and normalization preprocessing on the signals to eliminate interference; performing wavelet packet multi-scale decomposition, selecting a wavelet as a primary function, and performing wavelet packet decomposition on the preprocessed zero-sequence current signals of each line to obtain decomposition coefficients of different frequency bands; selecting characteristic frequency bands, calculating signal energy of each frequency band after each line is decomposed, and selecting the frequency band with the maximum signal energy; constructing a comprehensive criterion, wherein the comprehensive criterion comprises a polarity criterion and an amplitude criterion; and fault line discrimination: comparing the polarity criterion of each line with the bus voltage polarity, and finding out the line with opposite polarity and the most significant amplitude, namely the fault line. And the line selection accuracy and reliability under complex conditions are improved.

The invention provides a size detection device for processing a lustring roller, relates to the technical field of size detection of lustring rollers, and aims to solve the problems that an existing device is tedious in distance adjustment, inflexible in base installation and low in detection precision due to lack of matched software. The device comprises a laser transmitter and a laser receiver which are oppositely arranged, a bottom plate of which the top surface is provided with a guide groove, a sliding assembly comprising a driving motor, and a control software system, and comprises a pattern interference elimination module, a data acquisition module, a space adaptive adjustment module, a multi-dimensional parameter fusion calculation module, an error compensation module and a motor control module. The sliding assembly drives the laser transmitter to automatically adjust the distance, and the fixing plate can be stored on the bottom face of the bottom plate to adapt to multiple scenes. And the control software system eliminates pattern interference, calculates the outer diameter / cylindricity / local concave-convex degree, and compensates environment and mechanical errors. The device effectively solves the problem of pain points of an existing device, is high in software and hardware adaptability, remarkably improves the detection efficiency and precision, adapts to lustring rollers of multiple specifications, and is convenient to operate and high in practicability.

The present invention relates to a method and a device for carrying out a method for cleaning depth information of a three-dimensional scene from interference signals, wherein a three-dimensional scene is irradiated by means of a micromechanical mirror that can be tilted about two axes with an irradiation pattern of emitted electromagnetic radiation in a spatially and time-dependent manner, wherein electromagnetic radiation reflected at the three-dimensional scene is detected, so that a reflection image of the three-dimensional scene is captured, from which the depth information of the scene is evaluated based on a comparison of the captured reflection image with a reference image.In order to remove interference signals from the measurement, the method provides parameters of the irradiation pattern at the time of acquisition of the reflection image in a cleaning step and compares a cleaning reference image, which is calculated from a feedback signal of the mirror, with the reflection image in order to identify and eliminate sections in the reflection image that contain interference signals.

The invention discloses a transient voltage and current rapid protection method, system and device and a medium, and belongs to the technical field of power distribution network transient voltage and current protection, and the method comprises the steps: obtaining an analog signal through a sensing module, and carrying out the analog signal processing through a main control module; the main control module carries out filtering elimination on the digital signal after digital conversion by using an FPGA (Field Programmable Gate Array); and the main control module executes range adjustment, fault detection and protection control based on the filtered data, drives the parallel protection module to protect the element and records the system state. According to the transient voltage and current rapid protection method, the sensing module acquires signals, the master control module performs isolation conditioning and digital conversion, the FPGA performs parallel real-time filtering to eliminate interference, the self-adaptive range and multi-parameter fault accurate criterion is adopted, and an optical coupler isolation driving protection element is adopted. Microsecond-level high-speed response and high-reliability protection are achieved, fault expansion is effectively prevented, and equipment safety is guaranteed.

The invention relates to a backflow cable anti-theft method and system based on power line carrier noise suppression, and belongs to the technical field of power system security, and various noise components in a signal are effectively separated by performing sliding window preprocessing and empirical mode decomposition on the carrier communication signal collected by multiple monitoring nodes; then, intelligent suppression and future trend prediction of noise are realized by adopting a mode of combining classification weighting and LSTM network prediction; through the synergistic effect of a dynamic threshold mechanism and an unscented Kalman filtering algorithm, the system can adaptively adjust the noise suppression intensity, and interference components are eliminated to the maximum extent while the signal integrity is ensured; and finally, based on double criteria of short-time energy and zero-crossing rate characteristics and in combination with a multi-node delay inequality positioning algorithm, accurate identification and accurate positioning of theft events are realized.

The invention provides a screen information anti-leakage method and system, and relates to the field of information security, and the method comprises the steps: calculating and generating a target moire fringe pattern which can strongly interfere with secret photographing equipment based on preset secret photographing equipment parameters and the energy distribution of original information in a transform domain; the Hash value of the original information content and the dynamic safety parameters are subjected to logical operation and then input into a hyperchaotic system, a chaotic phase mask bound with the content and time is generated, amplitude-frequency information and a mask of moire fringes are combined, a preset imaging light path model is subjected to reverse optimization calculation, and a stable and effective anti-divulging disturbance pattern within a preset range is obtained. And carrying out pixel-level superposition on the anti-leakage disturbance pattern and the original information through a multi-scale fusion algorithm, generating a display frame, outputting the display frame to a screen, and updating the disturbance pattern along with the frame or the period to resist the attack of multi-frame average interference elimination.

The present application relates to the technical field of neutron flux measurement, and particularly relates to a neutron flux measurement interference elimination system and method, which comprises: a detection unit for detecting neutron flux and sending an initial measurement signal; a reference signal generation unit for generating a reference signal; a transmission unit for transmitting the initial measurement signal, the initial measurement signal being interfered to form an interfered measurement signal during transmission; and a processing unit for receiving the interfered measurement signal and the reference signal, and obtaining the initial measurement signal according to the reference signal and the interfered measurement signal. The present application collects the interference signal during transmission of the measurement signal as the reference signal or generates the reference signal by simulating the known interference signal, and then eliminates the interfered measurement signal based on the offset algorithm, so as to restore the real and accurate neutron flux measurement signal.

The application relates to a backflow cable anti-theft method and system based on power carrier noise suppression, and belongs to the technical field of power system security and protection. Through sliding window preprocessing and empirical mode decomposition of carrier communication signals collected by multiple monitoring nodes, various noise components in the signals are effectively separated. Then, a combination of classification weighting and LSTM network prediction is adopted to realize intelligent noise suppression and future trend prediction. Through the synergistic effect of a dynamic threshold mechanism and an unscented Kalman filtering algorithm, the system can adaptively adjust the noise suppression strength, maximize the elimination of interference components while ensuring signal integrity. Finally, based on the double criteria of short-time energy and zero-crossing rate characteristics, combined with a multi-node time delay difference positioning algorithm, accurate identification and precise positioning of the theft event are realized.

The utility model discloses a rapid satellite alignment device based on a Beidou compass, which comprises a main control module, a double-receiving mechanism, a signal fusion processing module, an angle adjusting mechanism and a mounting bracket, and is characterized in that the angle adjusting mechanism and the main control module are mounted on the mounting bracket; the double-receiving mechanism and the signal fusion processing module are installed on the angle adjusting mechanism, and the master control module is provided with a signal processing unit and a control unit. According to the method, errors possibly caused by a single signal can be reduced by providing redundant data, so that the accuracy of beam pointing is improved, interference can be effectively eliminated by double receiving of the same satellite signal, the anti-interference capability of a system in a complex environment is enhanced, and data stability is ensured.

The invention discloses a ground-based imaging radar moving target interference elimination method based on a range profile clutter map. The method comprises the following steps: generating a clutter map of a one-dimensional range profile by using a CACM-CFAR algorithm; comparing the generated range profile clutter map with the current one-dimensional range profile, and accurately judging interfered pixels by combining amplitude and phase thresholds; the static clutter estimation value of the corresponding pixel in the range profile clutter map is adopted to replace and correct the interfered pixel; and azimuth focusing is realized by using a BP imaging method, and moving target interference elimination in radar imaging is completed. The technology can effectively eliminate the amplitude phase interference of the moving target on the radar image.

The present application provides a communication method and a related apparatus. The method comprises: a terminal device finds, from first configuration information, a sampling sequence and a comb offset corresponding to a first antenna port. Then, on the basis of the sampling sequence corresponding to the first antenna port and the comb offset corresponding to the first antenna port, the terminal device determines frequency domain positions of N frequency units corresponding to the first antenna port, and sends a first reference signal sequence by means of the frequency domain positions of the N frequency units corresponding to the first antenna port, N being an integer greater than or equal to 2. The N frequency units corresponding to the first antenna port are arranged at non-uniform intervals, which helps reduce interference and improve channel estimation performance. For example, when a communication system needs to support a large number of antenna ports and / or channel delay is large, if the N frequency units corresponding to the first antenna port are arranged at non-uniform intervals, interference can be eliminated by means of methods such as filtering, thereby improving channel estimation performance.

The present invention discloses a method for multiple access transmission with a shared codebook without user identification (URA) that approaches the theoretical capacity under a finite field. The source data of each user terminal is encoded according to the encoding method proposed by the present invention, and the signal is transmitted according to the disclosed sending method. The multi-user signal is dispersed in several subframes. The disclosed encoding and sending methods can construct subframe signals with strong noise resistance. The disclosed decoding method completes the detection and estimation of the active sequence codeword channel state information based on the signal transmission energy and noise statistical information estimation and the pre-stored spread spectrum sequence codebook, and performs soft demodulation and decoding on the state information of the subframe time slot. In addition, the recovered information obtained by parity check is reused for serial interference elimination, and this iterative operation can improve system performance. Under a finite field, the above scheme improves the user capacity of multi-antenna multiple access and approaches the theoretical capacity of multi-antenna without user identification shared codebook multiple access.

This invention discloses a spline-adaptive method for eliminating power frequency interference in surface electromyography (EMG) signals, within the field of EMG signal noise reduction technology. The method includes the following steps: frequency domain input vector generation and frequency domain spline adaptive filtering; power frequency interference elimination; construction of a semi-quadratic criterion cost function and filter coefficient update; iterative update, repeating the above steps until noise reduction is complete. This spline-adaptive method for eliminating power frequency interference in EMG signals employs a robust frequency domain implementation method to construct the spline adaptive noise reduction system, exhibiting good stability, high computational efficiency, and the ability to efficiently eliminate power frequency interference.

This invention relates to the field of electric passenger vehicle ride comfort testing technology, specifically to a device and method for synchronously acquiring and eliminating motion sickness parameters in electric passenger vehicles. It includes: a full-area flexible pressure sensor array to acquire human contact pressure signals; a multi-modal motion vibration monitoring module to simultaneously acquire vehicle body and human motion and vibration signals; a data acquisition unit to receive and process raw sensor data; an intelligent calculation unit to calculate mechanical, kinematic, and vibration parameters; an adaptive calibration unit to calibrate sensor baselines and dynamically adjust sensitivity and calculation coefficients; a dual-linkage verification unit to verify data validity; an autonomous motion interference elimination unit to separate the vehicle-related motion and human autonomous motion components, eliminating interference data; and a data output unit to output valid raw data and calculated parameters to an external system. This technical solution can achieve accurate acquisition of multi-dimensional motion sickness parameters in electric passenger vehicles and intelligent elimination of interference data.

The present application relates to the technical field of textile equipment state monitoring. The purpose is to provide an abnormal vibration mode identification and state monitoring method for the spindle of a covering yarn machine. Through full-section multi-section sensing layout, mechanical vibration reduction and anti-interference design, four-stage dynamic precision compensation algorithm and working condition coupling abnormal identification model, the present application realizes accurate collection of spindle vibration signals, interference elimination, fault identification and positioning, and solves the core problems of incomplete coverage, weak anti-interference, low precision, fuzzy positioning and untimely early warning in the prior art.

The utility model provides a voiceprint sensor circuit of a combined power fan blade, which belongs to the technical field of fan blades and comprises a first differential mode interference elimination module, a second differential mode interference elimination module, a first common mode interference elimination module and a third differential mode interference elimination module, the first differential mode interference elimination module is used for eliminating differential mode static electricity, electrical fast transient pulse train and differential mode surge interference of the direct current power supply, the second differential mode interference elimination module is used for eliminating differential mode static electricity interference, and the first common mode interference elimination module is used for eliminating common mode surge and electrical fast transient pulse train interference. And the third differential mode interference elimination module is used for eliminating differential mode surge and electrical fast transient burst interference. According to the scheme, the protection performance of the voiceprint sensor can be improved.

Embodiments of the present disclosure relate to a user equipment apparatus, method, and computer program for self-interference cancellation The UE apparatus comprises a first transmit chain (210) comprising a power amplifier, PA, (211) and a coupler (213) connected serially, a second transmit chain (220) comprising a PA (221) and a coupler (223) connected serially, and an interference cancellation circuit (230) configured to feed an output signal of an aggressor transmit chain back to an input terminal of a PA in a victim transmit chain to cancel interference of the aggressor transmit chain with the victim transmit chain, wherein the aggressor transmit chain is one of the first transmit chain (210) and the second transmit chain (220) causing the interference, and the victim transmit chain is another one of the first transmit chain (210) and the second transmit chain (220) subject to the interference.

The application discloses an OFDM transmission method and system of a marine channel. The method can include: a transmitting end transmits a signal, converts the signal into a time domain through an IFFT, eliminates interference, converts the signal back into a frequency domain through an FFT, and obtains a frequency domain signal; divides the frequency domain signal into useful data and pilot data, and performs channel estimation on the pilot data; performs equalization, parallel-serial conversion and demodulation on the channel estimated signal and the useful data, and a receiving end obtains a final receiving signal. The application can effectively filter noise interference through an improved channel estimation method.

Seeker devices and methods of navigation are disclosed. Devices comprise a self-protecting direction finder that can determine direction to a source of RF interference, cancel the interference, and provide direction signals and desirably received signals to the flight controller, which guides navigation with respect to the jammer.

The invention relates to the technical field of steam turbine generator sets, and particularly discloses a steam turbine bearing vibration high-frequency interference removal optimization method and system, and the method comprises the steps: carrying out the wavelet transformation of a bearing vibration signal of a steam turbine, and obtaining a high-frequency part of the bearing vibration signal; segmenting the bearing vibration signal of the steam turbine according to a preset segment, calculating the waveform complexity of each vibration signal segment, and calculating a characteristic distance value according to the waveform complexity; determining a fault characteristic value according to the waveform complexity and the characteristic distance value of the vibration signal segment, and judging a high-frequency part type corresponding to the wavelet coefficient of the vibration signal segment according to the fault characteristic value, the high-frequency part type comprising a noise part and a fault part; and filtering a noise part in the bearing vibration signal, and performing fault evaluation on the turbine bearing according to a fault part of the bearing vibration signal after noise filtering. According to the method, high-frequency noise in the vibration signals can be effectively filtered out, fault features are reserved, and the noise removal capacity of the steam turbine bearing is optimized.

The invention relates to an interference elimination method and device and computer equipment. The method comprises the following steps: receiving an initial time domain signal on a time-frequency resource of a serving cell; wherein the initial time domain signal is a superposed signal of a first physical broadcast channel (PBCH) signal from a serving cell and a second PBCH signal from a same-frequency interference cell of the serving cell; pBCH decoding is carried out on the initial time domain signal to obtain first cell information; wherein the first cell information comprises a target synchronization signal of the first cell and PBCH block SSB center frequency point information; determining the first cell as a same-frequency interference cell according to the cell center frequency point information and the target SSB center frequency point information, and performing same-frequency interference elimination on the initial time domain signal according to the cell center frequency point information; wherein the cell center frequency point information comprises the actual SSB center frequency point information of the service cell and the actual SSB center frequency point information of the same-frequency interference cell. The method can effectively eliminate the same frequency interference and improve the communication quality.