71 results about "Infrasonic waves" patented technology

The invention relates to the technical field of intelligent health, and discloses an intelligent health middle-aged and elderly people behavior data real-time monitoring and analysis method and system, and the method comprises the steps: collecting a biological resonance signal, a gas spectrum and a sound wave signal of middle-aged and elderly people; constructing a resonance characteristic spectrum of the middle-aged and elderly people, and analyzing physiological feedback characteristics of the middle-aged and elderly people by using the resonance characteristic spectrum; constructing an odor-behavior association map of the middle-aged and elderly people, and identifying gas feedback characteristics of the middle-aged and elderly people by using the odor-behavior association map; performing frequency domain decomposition on the sound wave signal to obtain an infrasonic frequency band and an ultrasonic frequency band, identifying internal organ vibration characteristics and body surface action characteristics of the middle-aged and elderly people, and analyzing voiceprint feedback characteristics of the middle-aged and elderly people; the physiological feedback features, the gas feedback features and the voiceprint feedback features are used for conducting behavior analysis on the middle-aged and elderly people, and a behavior monitoring report is obtained. The method can improve the reliability of behavior abnormality analysis of the elderly in smart health.

The invention discloses a residual capacity balance control method and system for an aged lithium battery, and relates to the technical field of new energy materials and devices, and the method comprises the steps: inputting quantum magnetic field response data and infrasonic wave signals into a single-chip microcomputer, carrying out the wavelet noise reduction and histogram equalization processing based on an STM32 single-chip microcomputer, and generating an acoustic-magnetic coupling feature matrix; inputting a dynamic pheromone equalization model based on the acoustic-magnetic coupling characteristic matrix, calculating a capacity difference coupling coefficient between the battery packs through an ant colony optimization algorithm, and generating a capacity redistribution path topological graph; according to the capacity redistribution path topological graph, the energy transfer direction is controlled through a bidirectional Buck-Boost circuit, and an equalizing current threshold value is dynamically adjusted based on the quantum spin resonance magnetic field gradient; according to the invention, the quantum magnetic field response data of the aged lithium battery pack and the infrasonic wave signal generated by electrolyte decomposition are collected, so that the physical and chemical states in the battery are accurately monitored.

The invention discloses a debris flow infrasound recognition method based on a Mel spectrogram and a lightweight neural network, and belongs to the field of image data processing, and the method comprises the steps: collecting infrasonic wave signals generated by on-site debris flow and other events, and generating a Mel spectrogram data set; constructing a channel alignment fusion bridge; constructing an improved MBConv block; constructing a debris flow infrasound recognition network based on the channel alignment fusion bridge and the improved MBConv block; and training by using the Mel spectrogram data set to obtain a debris flow infrasound identification model, and identifying the infrasound signal to be identified. According to the method, the characteristics of debris flow infrasonic waves are combined, samples in the data set are constructed into the infrasonic mel spectrogram, the debris flow infrasonic recognition network is designed based on the multi-stage lightweight feature extraction module, the infrasonic mel spectrogram is classified and recognized, the calculation complexity can be effectively reduced, the parameter quantity can be reduced, low-power-consumption equipment can be adapted, and the method is suitable for popularization and application. The method can improve the classification accuracy, and is especially suitable for the real-time early warning scene of debris flow.

The invention discloses a multi-parameter fusion dangerous rock mass instability precursor identification method, which comprises the following steps: S1, generating a thermodynamic diagram of dangerous rock mass crack distribution, dividing each sub-region and setting each risk level; constructing a monitoring network; s2, performing time alignment and space alignment on the monitoring data; s3, the GNN model calculates and outputs each instability probability of each monitoring node; and S4, generating a global risk thermodynamic diagram according to each instability probability, and performing graded early warning based on a preset probability threshold. According to the method, the unmanned aerial vehicle thermodynamic diagram is used for guiding sensor optimization deployment, multi-dimensional data such as deformation, osmotic pressure, COs and infrasonic waves are fused, the model for identifying the instability of the dangerous rock mass is constructed by using the GNN model, accurate calculation and graded early warning of the instability probability are achieved, and the identification accuracy and early warning real-time performance are remarkably improved.

The invention discloses an oil well working fluid level measuring method, system and device based on infrasonic waves. The method comprises the following steps: acquiring an acquired mixed infrasonic wave pulse signal, and separating a tubing coupling reflection wave curve and an oil well liquid level reflection wave curve from the mixed infrasonic wave pulse signal; a gradient descent algorithm is adopted to find a multi-section waveform minimum value point on the tubing coupling reflection wave curve, and the propagation speed of the infrasonic wave pulse in the oil sleeve annulus is determined according to the sampling point time corresponding to the minimum value point and the length of the tubing coupling; based on the selected depth base point, reversely searching a first minimum value point on the oil well liquid level reflection wave curve by adopting a gradient descent algorithm, and determining the reflection time of the infrasonic wave pulse according to the sampling point time corresponding to the searched minimum value point; and the depth of the working fluid level of the oil well is determined according to the propagation speed of the infrasonic wave pulse in the oil sleeve annulus and the reflection time of the infrasonic wave pulse. The measuring efficiency, the measuring precision and the real-time performance of the working fluid level of the oil well can be improved.

The invention relates to the technical field of drainage pipeline detection, and discloses a drainage pipeline structural defect detection system and method, a medium and a product, a controller actively constructs and generates a coded infrasonic wave signal, and it is ensured that the signal has stable frequency and amplitude characteristics; the infrasonic sound production module performs infrasonic wave emission and processing by using a coded infrasonic wave signal, and enables a low-frequency mechanical vibration signal to be stably propagated along a pipe wall, so that energy attenuation is reduced, and a long-distance pipe section which is difficult to touch in traditional passive detection is covered; the infrasound signal receiving module is used for detecting low-frequency mechanical vibration signals and converting analog signals into initial digital signals, and interference and distortion in the transmission process are reduced. Furthermore, by combining a Fourier transform method and a correlation coefficient analysis method, the problem of high misjudgment rate of a traditional single algorithm is avoided, accurate recognition of the structural defects of the pipeline is ensured, and the requirement for accuracy of structural defect detection of the drainage pipeline under complex working conditions is met.

The invention relates to a pneumatic membrane structure fluid-structure interaction multi-physics field synchronous test method, which relates to the technical field of vibration measurement, and comprises the following steps: conformally embedding a flexible capacitive sensor array in the surface of a pneumatic membrane structure, detecting mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement through capacitance value change (electrical characteristics), and measuring the displacement of the flexible capacitive sensor array; and the capacitance value change rate delta C / C and the displacement delta x are in a linear proportional relationship. According to the pneumatic membrane structure fluid-solid coupling multi-physics field synchronous test method, a flexible capacitive sensor array is conformally embedded in the surface of a pneumatic membrane structure, and mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement is directly detected by using capacitance value changes; wherein the linear proportional relation between the capacitance value change rate delta C / C and the displacement delta x is directly determined by the electrode distance and the dielectric constant of the capacitive sensor, so that the physical directness of vibration wave measurement is realized, the error caused by indirect calculation depending on a traditional strain gauge or an optical method is avoided, and the vibration wave displacement measurement precision is remarkably improved to + / -0.5% full scale.

The present application relates to the technical field of pipeline leakage, in particular to a pipeline leakage aperture identification method based on APSO-HMM. The method comprises: constructing multiple training sets, each corresponding to a pipeline leakage aperture; inputting each training set into an HMM model for training iteration, and using APSO algorithm to optimize the initial value of the observation value under each state, i.e. the initial value of B, in the training process; bringing the optimal initial value obtained by the APSO algorithm into the HMM model, and using the Baum-Welch algorithm to iteratively calculate the HMM model to obtain the trained APSO-HMM model; extracting the feature vector T of the infrasound wave original signal leakage signal x(t) to be identified, inputting the feature vector T into each trained APSO-HMM model respectively, and outputting the pipeline leakage aperture corresponding to the APSO-HMM model with the maximum log-likelihood probability as the identification result. The present application can avoid improper selection of the initial value of the model, thereby improving the identification effect of the pipeline leakage aperture.

The invention relates to the technical field of drainage pipe network management, and discloses a method and a device for checking hidden connection of branch pipes of a drainage pipe network based on active voiceprint conduction, and the method comprises the steps: receiving an infrasonic wave signal transmitted by an infrasonic wave source generator to a target pipe section of the drainage pipe network through an infrasonic wave sensor, and transmitting the infrasonic wave signal to an analyzer; and analyzing the infrasonic wave signals through an analyzer to obtain a checking result of the hidden connection of the branch pipes of the drainage pipe network. According to the invention, low-cost and high-efficiency troubleshooting of the branch pipe concealed connection problem is realized.

The utility model relates to the technical field of measurement and testing, in particular to metering equipment which is characterized by adopting infrasonic wave, acoustic wave and ultrasonic vibration. According to the technical scheme, the cable winding anomaly detection device based on ultrasonic ranging comprises a switch assembly and ultrasonic detection devices, the ultrasonic detection devices are located at the two ends of a cable reel in the running direction, and each ultrasonic detection device comprises an ultrasonic sensor and a driving mechanism; the driving mechanism drives the ultrasonic sensor to rotate through the rotating holder mechanism, and the switch assembly comprises a pressure switch and an over-loose and over-tight limiting switch. The problems of complex structure, low accuracy and slow response speed in the prior art are solved, and the purposes of high accuracy, good reliability, long service life, low cost and multiple protection mechanisms are achieved.

The present invention proposes a detector and a measurement method for detecting leaks in a confined space using infrasonic technology. The detector for detecting leaks in a confined space using infrasonic technology includes a gas leak detector and a closed container leak detector; the closed container leak detector is arranged in the confined space to be detected. The measurement method includes: placing the closed container leak detector in the closed container to be detected; the infrasonic generator of the closed container leak detector generates infrasonic waves to detect the target area, and the infrasonic waves generated by the infrasonic generator are detected by a receiving probe; headphones are used to receive the friction sound between the gas molecules detected by the gas leak detection module and the outlet of the damaged closed container, and the leak position is located based on the principle of linear propagation of infrasonic waves to obtain the gas leak position.

1. The name of the present design product: infrasonic stress monitoring instrument (BMEDCTOMISSMS). 2. The use of the present design product: equipment for monitoring the stress and strain generated by materials or structures under stress. 3. The design points of the present design product: in the combination of its overall shape and color. 4. The picture or photo that best indicates the design points: perspective view 1. 5. The design claimed contains color.

The present application relates to the technical field of energy supply, and particularly relates to a comprehensive energy substation supply method and device and a storage medium, the method comprising: collecting environmental parameters, geological parameters and energy demand of underground space; constructing an environmental risk factor based on collected environmental temperature, environmental humidity, carbon dioxide concentration and methane concentration in a monitoring period, constructing a geological factor based on collected rock stratum micro-vibration frequency, water seepage rate and rock stratum displacement in the monitoring period, and determining an underground space risk index by combining the environmental factor and the geological factor; determining an energy supply coefficient based on the underground space risk index in the monitoring period, and generating an energy supply strategy by combining the energy demand in the next monitoring period; determining an update factor; and updating the energy supply strategy based on the subsonic wave harmonic proportion, lichen conductivity and the update factor collected in the monitoring period. The present application effectively improves the energy supply efficiency of the comprehensive energy substation.

The embodiment of the application provides a novel capacitive infrasound sensor and an infrasound detection method, and belongs to the technical field of pipeline leakage detection. The novel capacitive infrasound sensor is characterized in that the novel capacitive infrasound sensor comprises: a detection cavity, which is connected with a pipeline to be detected through an acoustic sampling channel and is used for sensing infrasonic pressure pulsation caused by pipeline leakage; a reference cavity, which is connected with an external environment through a micropore array to form a pressure relief path with a preset time constant and is used for providing a stable reference pressure in a low frequency band; a capacitive sensing unit located between the detection cavity and the reference cavity, which is used for converting a differential pressure change between the detection cavity and the reference cavity into an electric signal; and a chopping demodulation circuit connected with the capacitive sensing unit, which is used for inhibiting low-frequency noise and DC drift in a demodulation process and obtaining a stable infrasound signal output. The scheme of the application realizes high-fidelity introduction of an infrasound signal for pipeline leakage detection while ensuring safety and reliability.

The invention relates to an audio recognition method and device, computer equipment, a storage medium and a program product, and relates to the technical field of audio recognition. The method is executed by computer equipment and comprises the steps that audio identification information of an audio file is obtained, the audio identification information is information obtained after a target frequency band in the audio file is converted, and the target frequency band comprises at least one of an ultrasonic frequency band and an infrasonic wave frequency band; based on the audio identification information, executing an identification operation on the audio file to obtain an identification result; specification processing is performed based on the recognition result. According to the audio recognition scheme, the audio recognition accuracy can be improved on the basis of ensuring the concealment and security of the watermark information of the audio file.

A non-lethal electronic defense device comprising one or more effects such as light, sonic, ultrasonic, infrasonic, chemical, electrical, or mechanical devices capable of causing intense sensations of disorientation, distress, incapacitation, and / or pain for the purpose of protecting a public or private space from an intruder or attacker exhibiting an intent to cause harm to physical inhabitants or destruction of property therein.

The embodiment of the application provides a kind of equipment abnormality detection method and system based on infrasonic wave data, belong to equipment state detection technical technical field.The method comprises: collecting infrasonic wave signal and corresponding medium characteristic parameter in the running process of target equipment, establish the medium propagation characteristic table for representing signal propagation path;Based on the medium propagation characteristic table, construct propagation correction model, execute distortion correction to infrasonic wave signal, output correction signal;Based on correction signal, extract time-varying characteristic parameter and construct time-varying characteristic matrix, calculate characteristic drift rate and input drift determination model;Based on drift determination model, execute environment normalization and covariance drift analysis, when drift rate exceeds preset threshold, output equipment abnormality determination result.The present application scheme realizes the distortion correction of infrasonic wave signal in complex propagation medium and multi-feature covariance drift identification, so as to accurately locate equipment abnormal position under environmental interference and determine abnormal type.

The invention relates to the technical field of oil and gas pipeline defect infrasonic wave detection. The invention relates to an infrasonic wave detection method based on oil and gas pipeline defects. The method comprises the following steps: S1, deploying an infrasonic wave sensor array to collect infrasonic wave signals of an oil and gas pipeline, and synchronously obtaining oil and gas state parameters and working condition parameters of the oil and gas pipeline and the mounting position of each infrasonic wave sensor; according to the method, by adopting a hierarchical positioning strategy of combining a fuzzy positioning narrowing range with multi-sensor joint precise positioning, firstly, a fuzzy defect position is quickly locked through a signal time difference and amplitude attenuation rule, and then an optimization model is constructed by utilizing a least square method in combination with a defect type, a signal difference characteristic and sensor space information; the defect positioning precision is greatly improved, the positioning error is controlled within an acceptable range of actual operation and maintenance, and accurate position reference is provided for on-site defect disposal.

The invention relates to the field of acoustics, and discloses an infrasonic wave directivity regulation and control resonance structure, which comprises an annular structure formed by a plurality of splicing monomers, each splicing monomer comprises a resonance unit and a temperature control unit, each resonance unit comprises a plurality of same sub-modules, each sub-module is arranged along the radial direction of the resonance unit, and each sub-module is connected with the corresponding temperature control unit. The sub-modules are fan-shaped along the outer contour of the radial section of the resonance unit, a labyrinth-shaped channel is formed in each sub-module, each sub-module is provided with an inlet, the resonance unit is provided with a through channel in the radius direction of the resonance unit, the temperature control unit comprises a power supply and a temperature adjusting end which are connected with each other, and the temperature adjusting end is located in the through channel. And the temperature adjusting end can refrigerate and heat. According to the invention, infrasonic wave radiation is controlled only through the resonance unit which is designed through a special structure, the working frequency of the structure is changed through the temperature control unit, dynamic directivity regulation and control of infrasonic waves with different frequencies are realized, and the device has the advantages of compact structure, simplicity, high efficiency, flexibility, adjustability and the like.

The invention relates to the technical field of drainage pipelines, and discloses a defect detection method, device and equipment of a drainage pipeline, a medium and a program product, and the defect detection method of the drainage pipeline comprises the following steps: controlling an infrasonic wave signal transmitter to transmit an infrasonic wave signal to a target drainage pipeline, and collecting a plurality of initial echo signals of an infrasonic wave signal receiver array; performing pulse compression processing on each initial echo signal to obtain a plurality of pulse compression output signals; determining echo arrival time corresponding to each pulse compression output signal according to the position of a correlation peak in each pulse compression output signal; according to the echo arrival time corresponding to each pulse compression output signal, the position information of the infrasonic wave signal transmitter, the position information of each sensor array element in the infrasonic wave signal receiver array and the preset sound velocity, the position of the defect in the target drainage pipeline is determined. The defect position of the drainage pipeline is detected, and the accuracy of drainage pipeline defect detection is improved.

A method for stimulating hydrogen production (200) from an injected formation (102). The method includes the step of providing a well system (106) through a subterranean formation (104) into an injected formation (102) containing hydrocarbons. Carbon dioxide, water, steam, and combustion gases are introduced into the injection formation (102) via a well system (106). Further, one or more of infrasonic, acoustic, and ultrasonic stimulation (225) is used to stimulate the injected formation (102). The injected formation (102) is monitored (230) via one or more sensors located in the injected formation (102) to determine one or more properties of the reaction and backflow effluent in the injected formation (102). A reflux operation (240) is performed to recover a reflux effluent.

The invention discloses a chemical gas leakage safety detection method and system based on DAS, and relates to the technical field of leakage detection. Acquiring global signal data of the target area, and performing security detection according to the global signal data to obtain an anomaly detection result; determining a sub-region according to an anomaly detection result, and obtaining local signal data of the sub-region; and detecting the local signal data to obtain a local detection result, and performing safety early warning according to the local detection result. Global signals are collected through the DAS, the pipeline abnormal area is rapidly recognized through the distributed characteristics of the global signals, the detection workload is reduced, and the response efficiency is improved; the DAS cooperates with the infrasonic wave sensor, the former provides an abnormal orientation, and the latter focuses local details and accurately captures micro-leakage features.

The invention discloses a safety monitoring method and system based on a coal yard of a thermal power plant, and relates to the technical field of safety monitoring of the coal yard of the thermal power plant. Infrasonic wave sensors and optical fiber transmitting units are arranged around the coal yard, infrasonic wave and stress wave information is collected, and then the cross correlation coefficient of the stress wave event rate and infrasonic wave energy is calculated; judging whether the mechanical motion is strongly correlated with the thermal reaction or not, setting degradation and acceleration coefficients according to the mechanical motion and the thermal reaction, and constructing a mutual feedback model of a stress state index and a thermal stability index; the method comprises the following steps: firstly, calculating a model, then evaluating a risk early warning level according to a model calculation result, finally analyzing an early warning operation execution process, and through multi-physics field signal coupling analysis and dynamic mutual feedback modeling, realizing accurate early warning of risks of collapse, spontaneous combustion and the like of the coal yard, solving the defects of traditional single monitoring, improving timeliness and accuracy of potential safety hazard identification, and improving the safety hazard identification efficiency. And a scientific technical scheme is provided for safety management of the coal yard of the thermal power plant.

The utility model discloses a medium infrasonic wave change-based leakage monitoring device for a directly-buried heat supply pipeline, which comprises a pipeline body, and the upper side of the pipeline body is connected with a mounting plate; the connecting plate is movably mounted at the lower end of the pipeline body, a fixing structure is fixedly mounted on the outer side of the upper end of the connecting plate, and the fixing structure comprises a fixing plate, a movable block and a mounting rod; the signal processor is arranged on the middle side of the upper end of the mounting plate, a fixing block is fixedly mounted on the outer side of the lower end of the mounting plate, a limiting structure is connected to the outer side of the middle of the mounting plate, an infrared thermal imager is connected to the lower side of the limiting structure, and the limiting structure comprises a fixing rod and a connecting block. According to the direct burial heat supply pipeline leakage monitoring device based on the medium infrasonic wave change, the fixing structure is arranged, the infrasonic wave sensor can be installed, the limiting structure is arranged, the infrared thermal imager can be installed, and therefore the leakage position can be rapidly locked.

The application relates to the technical field of mechanical vibration or ultrasonic, underwater acoustic wave or infrasonic wave measurement, in particular to a laser interference measurement-based vibration liquid column hydrophone calibration device and method, which comprises a laser vibration tester, a to-be-measured hydrophone, a liquid column cavity suspending the to-be-measured hydrophone, and a vibration table connected with the liquid column cavity; the to-be-measured hydrophone is detachably connected with an adjusting and positioning mechanism; the adjusting and positioning mechanism is connected with the laser vibration tester for performing vibration measurement; the application introduces the adjusting and positioning mechanism and the laser vibration tester, solves the problem that accurate calibration of a low-frequency hydrophone cannot be realized in the prior art, and solves the technical problem that the uncertainty and deviation of the sensitivity calibration result of the hydrophone caused by a non-uniform sound field cannot be effectively reduced in the prior art through sound field modeling calculation and correction.

The invention belongs to the technical field of intelligent health monitoring and quantum sensors, and particularly relates to a quantum emotion monitoring system based on infrasonic wave-braingut axis collaborative feedback. Comprising a quantum MIMO array module, an infrasonic wave resonant cavity module, a thermal imaging module, an edge quantization processor module, a gamma wave intervention device module, a bone conduction earphone module and other hardware, the quantum MIMO array module is used as a physical layer carrier in the emotion quantum sensing system in the system, and the quantum MIMO array module is used as a physical layer carrier in the emotion quantum sensing system through an emission-receiving-quantization three-in-one framework; and micro-tremor quantum state analysis which cannot be completed by a traditional radar is realized. The emotion recognition accuracy of the method reaches 96.3%, and double-blind experiments of Beijing collaboration and hospitals prove that the original recognition accuracy is greatly improved; the intervention revolutionary improvement is realized, and the anxiety index gt of 89.7% of subjects is reduced within 5min of intervention; 40%; the privacy is absolutely guaranteed, the original quantum state waveform is locally destroyed, only the amplitude value is output, and the identity reducibility reaches 0% (SSIMlt; 0.15) for a motor vehicle.

The invention discloses a down-the-hole drill control method and system for pile foundation hole forming combined with blasting construction, and relates to the field of measurement of ultrasonic waves, sound waves or infrasonic waves, in the method, a sound wave emitter is controlled to emit first detection sound waves, and direct waves and stratum waves are collected; first rock mass acoustic characteristic parameters are calculated, and one or more suggested blasting areas are determined; after millisecond blasting is executed, the down-the-hole drill is driven again, and the sound wave emitter is controlled to emit second detection sound waves; second rock mass acoustic characteristic parameters are obtained through calculation; determining a blasting fracturing weakening area and acoustic characteristic parameters corresponding to the blasting fracturing weakening area; and the controller adjusts at least one working parameter of the down-the-hole drill according to the acoustic characteristic parameters, so that the unit footage energy consumption of the down-the-hole drill in the drilling process is maintained within a preset range. The method is used for improving the window hit rate and the time sequence alignment precision, further improving the footage efficiency, reducing the unit footage energy consumption and the hammer clamping risk, and enhancing the stability of the hole forming quality.

The invention provides a pipeline leakage recognition algorithm and system. The pipeline leakage recognition algorithm comprises the steps of obtaining a training data set; the training data set comprises a joint feature vector and a leakage category; the joint feature vector is obtained by processing and fusing a training infrasonic wave signal detected by a first sensor arranged in the pipeline and a training vibration signal detected by a second sensor arranged outside the pipeline; the leakage types comprise no leakage opening, leakage opening and hole diameter of the leakage opening; training a leakage identification model by adopting the training data set; the input of the leakage identification model comprises a joint feature vector, and the output of the leakage identification model comprises a leakage category; acquiring a real-time infrasonic wave signal and a real-time vibration signal; processing the real-time infrasonic wave signal and the real-time vibration signal to obtain a real-time joint feature vector; and inputting the real-time joint feature vector into a leakage identification model to obtain a real-time leakage type of the pipeline. According to the pipeline leakage identification algorithm, the detection precision of small-aperture leakage of the pipeline can be improved.

Infrasonic musical vibrations may be induced into various compartments of the body for therapeutic purposes, ranging from relaxation to arousal or focus, but also specifically activating physiologic responses due to vibration sensitive receptors in these spaces. These include vibration of the wall of the enteral track to control appetite, vibration of the effacing cervix to augment the birthing reflex, augmentation of bladder urge control in training against incontinence, and inducing relief from craving in relapse prone individuals with various addictions. Exemplary embodiments facilitate induction of such harmonized and phased oscillations in a seated embodiment, and also their measurement at target locations as an integrated, individualized method for treatment.

The invention relates to the technical field of bird repelling, in particular to an infrasound bird repelling device for a high-voltage power grid and a bird repelling method thereof.The infrasound bird repelling device comprises a protection frame, two protection plates are rotationally connected to the top of the protection frame, solar panels are fixedly connected to the bottoms of the two protection plates, and fixing strips are fixedly connected to the bottoms of the protection plates; a connecting strip is rotationally connected to the lower side of the front side of the fixing strip, a deflection mechanism used for opening and closing the protection frame is rotationally connected to the side face of the connecting strip, an infrasonic wave generator is fixedly connected to the bottom face of the inner wall of the protection frame, and an output pipe is fixedly arranged at the top of the infrasonic wave generator; a stepping motor drives a gear block and an annular sleeve to rotate through a gear, an arc-shaped groove rotates along with the gear block, a circular block slides along the arc-shaped groove and drives a deflection plate to move under limiting of a chute, and the size of a middle gap of the deflection plate is changed. The stepping motor rotates back and forth to continuously change the size of the gap, so that the frequency of sound waves in the output pipe is adjusted, birds are prevented from adapting, and the bird repelling effect is guaranteed.