57 results about "Transverse wave" patented technology

This disclosure provides a wedge and design method for a multipath acoustic attenuation phased array ultrasonic testing probe. The wedge includes a wedge body, multiple silencing grooves, and a damping block. The extension direction, spacing, and depth of each silencing groove are configured such that at least a portion of the reflected transverse wave generated at the detection surface can be guided to an attenuation interface formed by the groove wall of the silencing groove and the damping block. Furthermore, the reflected longitudinal wave generated at the detection surface undergoes at least six interface reflections within the wedge body before returning to the probe direction. The acoustic characteristics of the damping block are configured to absorb the reflected transverse wave. The reflected transverse wave is attenuated at the attenuation interface through a combination of scattering by the silencing groove and absorption by the damping block. After at least six interface reflections, the acoustic component of the reflected longitudinal wave returning to the probe direction forms a 180° phase difference with the incident longitudinal wave emitted by the probe, thus being attenuated through phase interference.

The application discloses a two-dimensional distributed optical fiber sensing full waveform simulation method based on a discrete elastic lattice, and belongs to the technical field of seismic wave field simulation and distributed optical fiber sensing. The application comprises the following steps: receiving seismic wave data of a target geological medium layer; setting a two-dimensional calculation region according to the spatial distribution of the longitudinal wave velocity, the transverse wave velocity and the density parameters of the seismic wave, and taking the two-dimensional calculation region as a numerical simulation carrier of seismic wave propagation; discretizing the two-dimensional calculation region into a plurality of particle nodes, and connecting adjacent particle nodes through elasticity to form a discrete elastic lattice, so as to represent the mechanical properties of the stratum medium; and according to the density parameters, the longitudinal wave velocity, the transverse wave velocity or the equivalent elastic parameters of the stratum medium, the elastic connection between the particle nodes is endowed with corresponding elastic coefficients. The application provides a reliable numerical tool for DAS deployment design, data interpretation and seismological inversion, and can be widely applied to the fields of earthquake monitoring, oil and gas exploration, geological disaster warning and the like.

Non-destructive inspection of welded rail joints by ultrasound phase-array transducers in one device, precise positioning non-destructive inspection probes and moving the probes in longitudinal and transverse directions. Two scanners have ultrasound phase-array transducers and emission control unit for sequential or simultaneous inspection of welded joints using (i) two ultrasound phase-array transducers are directed to each other and operate separately, wherein the transducers provide a beam sector of 36-75 degrees; (ii) two ultrasound phase-array transducers are directed to each other and operate separately, wherein the transducers provide a beam sector of 26-24 degrees from the tread surface during longitudinal movement; and / or (iii) two ultrasound phase-array transducers are directed to each other, one transducer emits a transverse wave with a predetermined angle from the tread surface to the base of the rail, while the other transducer receives a longitudinal wave that occurs only when a vertical crack exists in the rail.

This invention discloses a peripheral wave-damping and power generation system for a floating marine unit, comprising a floating marine unit; a transverse wave-damping support is fixedly installed on the periphery of the floating marine unit, and a plurality of power-generating wave-dampers are arranged in an array along the length direction on the outer side of the transverse wave-damping support. Each power-generating wave-damper includes an inclined energy-absorbing plate, the lower part of which is submerged below the water surface, and the energy-absorbing plate can rotate and swing around a pivot. In a stable state, the energy-absorbing plate remains balanced under the combined action of gravity and buoyancy. When the wave-facing surface of the energy-absorbing plate is impacted by waves, the pivot corresponding to the energy-absorbing plate adaptively swings downward; the system has the function of power generation while damming waves and absorbing energy.

The application discloses a true-terrain elastic medium seismic wave field simulation method, device and equipment and a storage medium. The method comprises the following steps: determining each boundary point included in a target region and a support region including each boundary point based on longitudinal and transverse wave velocity field model data and elevation data of a seismic wave field of the target region; performing multidimensional Taylor series expansion on a seismic wave field value on each grid point included in the support region of each boundary point to construct a polynomial expression of the boundary point in spatial coordinates; constructing a constraint condition of the polynomial expression based on stress field model data of the boundary point to form an over-determined linear equation group of a boundary of the target region; solving the over-determined linear equation group to obtain derivative values of a particle vibration velocity field and a stress field at each boundary point; and modifying a standard finite difference operator based on the derivative values of the particle vibration velocity field and the stress field at each boundary point to perform true-terrain elastic medium seismic wave field simulation by using the modified finite difference operator.

The present application relates to the technical field of nondestructive testing of nuclear power equipment, and provides a nuclear power metal welded joint nondestructive testing method based on ultrasonic phased array imaging and application, comprising calculating the ultrasonic longitudinal wave velocity and transverse wave velocity of the nuclear power metal material; calculating the defect acoustic scattering response distribution under different angles of the organic glass wedge; using an ultrasonic array detection system, identifying bright spot abnormal points in an ultrasonic phased array scanning image and full matrix capture data corresponding to the positions; using a time reversal operator decomposition algorithm to perform signal denoising processing, obtaining denoised ultrasonic array signals; calculating the propagation time of the sound waves emitted by each element of the ultrasonic phased array after refraction through the glass wedge to each grid point, obtaining the Hilbert transform value of each grid point corresponding to the propagation time, and generating an ultrasonic imaging graph of the region; performing delay multiplication superposition and vector coherence factor denoising processing on the imaging data, and obtaining a welded joint nondestructive testing imaging result.

This invention proposes a method and system for measuring the elastic constants of unidirectional CFRP (Composite Material Reinforced Polymer) based on laser ultrasound and neural networks, belonging to the field of non-destructive testing technology for composite materials. The method employs an orthogonal cross-scanning laser ultrasound system to non-contactly excite and receive ultrasonic bulk wave signals in the parallel and perpendicular directions of the fiber. The arrival times of quasi-longitudinal waves (QL) and quasi-transverse waves (QSV, QSH) are extracted and combined with the scanning position to form input features. A training dataset is generated using ultrasonic bulk wave propagation theory, and a neural network model integrating Transformer and LSTM is constructed to realize the measurement of five elastic constants (C1, C2, C3, C4, C5, C6, C7, C8, C9 ... 11 C 12 C 22 C 44 C 55 This invention provides end-to-end prediction of thickness and other parameters. It avoids iterative optimization in traditional inversion methods, offers high computational efficiency, enables second-level measurements, and automates the entire process, making it suitable for rapid, high-precision, non-destructive testing of CFRP components in the field.

Embodiments of the present application propose an imaging system based on super-Raleigh limit focusing lens and its application, which can be widely applied in the technical fields of photolithography, biomedical, optical imaging and nanometer structure precision measurement; the system can produce transverse wave vector distribution and excitation and detection vector beams with wave vector range meeting the requirements by wave vector ring modulation on incident linearly polarized light, focus the vector beams to make the focusing field meet the scale requirements, so as to obtain super-Raleigh limit excitation PSF and detection PSF, and obtain a confocal PSF capable of exciting high-order terms of spot intensity by superimposing the excitation and detection PSFs, thereby improving the imaging resolution of the system; on the other hand, the system can use solid and hollow focusing spots formed by focusing vector beams to form an image, and calculate according to the imaging result to reduce interference, so as to obtain a high-resolution detection result far exceeding the Raleigh diffraction limit, and further improve the resolution of the imaging system.

The application provides a multi-excitation-point transient surface wave exploration method, equipment and a storage medium. The method comprises the following steps: exciting multiple seismic sources one by one, collecting multiple sets of common-source measurement data by a detector and performing screening, selecting common-source measurement data of the detector within a set offset distance range, taking one of the screened detectors as a central channel, taking the detectors within a set adjacent range as adjacent channels, and obtaining surface wave dispersion spectrum by using the common-source measurement data of the central channel and the adjacent channels to obtain the surface wave dispersion spectrum of the central channel; in this way, the surface wave dispersion spectrum of multiple detectors at different seismic sources is obtained in sequence, and the surface wave dispersion spectrum is superimposed; the underground transverse wave velocity structure of each detector is obtained based on the surface wave dispersion spectrum in sequence, so that the underground transverse wave velocity profile in the measurement range is obtained to complete the exploration. In addition, a multi-excitation-point transient surface wave exploration equipment and a storage medium are also provided. The imaging effect of the surface wave dispersion spectrum obtained by the method is greatly improved, and the exploration result is more accurate.

This application provides a focusing lens and its design method for achieving the Rayleigh limit, belonging to the field of optical component technology. The function of this focusing lens can be implemented by several devices. The principle of this focusing lens is to convert linearly polarized light into a focused vector beam with a transverse wave vector distribution and range that meet the requirements by vector beam modulation, ring beam modulation, and focusing. By using light with the required transverse wave vector components for focusing, a focused field that meets the requirements is formed, thereby achieving the Rayleigh diffraction limit. This focusing lens can be widely used in the fields of photolithography, optical super-resolution imaging, and precision measurement of nanostructures.

This invention relates to the field of transducer technology, specifically to an integrated coupled piezoelectric ultrasonic transducer, comprising an aluminum alloy cylindrical shell; silver-impregnated electrodes on both the upper and lower surfaces of the sensing unit, which simultaneously excite longitudinal and transverse waves under high-voltage pulse excitation; a backing damping block for absorbing reverse sound waves and improving signal clarity; a stainless steel bottom cover fixed to the open end of the shell and tightly coupled to a piezoelectric ceramic sheet, serving as protection and sound wave transition; an integrated coupling layer consisting of a flexible solid coupling sheet pre-attached to the outside of the stainless steel bottom cover; and a magnetic fixing ring, a ring-shaped neodymium iron boron permanent magnet embedded in the shell, for providing attraction force to the ferromagnetic bolts to stabilize the coupling pressure. Its advantages include: extremely simplified structure, compact size and light weight, low cost, elimination of measurement errors, improved measurement repeatability, and greatly simplified on-site operation procedures.

The application provides a longitudinal and transverse wave separation water exploration method and system based on a reflection coefficient and a stress gradient, and the method comprises the following steps: collecting original seismic record data of a tunnel site and performing pretreatment; a longitudinal and transverse wave separation method is used to separate longitudinal waves and transverse waves from the pretreated seismic wave data; wherein, F-K filtering separates wave fields with different apparent velocities through frequency-wavenumber domain transformation, and realizes preliminary separation of longitudinal waves and transverse waves; for the overlapping part of the longitudinal waves and the transverse waves remaining in the F-K domain; linear Radon transformation is used to map the data from the time-space domain to the ray parameter domain, and further separate the wave fields with similar apparent velocities; a polarization filter is used to finally separate the longitudinal waves and the transverse waves by using the polarization characteristics; based on the separated longitudinal waves and the transverse waves, reflection coefficient imaging and stress gradient imaging are calculated respectively; and according to the reflection coefficient imaging result and the stress gradient imaging result, the underground water occurrence condition is identified. The identification precision of the underground water occurrence condition is improved.

The present invention provides a means to increase the refraction angle of ultrasound on the inner surface of a pipe carrying cryogenic fluid compared to conventional methods, and to reduce ultrasound waves other than the central wave entering the cryogenic fluid, thereby improving the accuracy of detecting the propagation time of ultrasound. [Solution] The wedge 20 has a first surface 21, a second surface 22, and a third surface 23 that are perpendicular to the central plane 4 containing the central axis Z. The first surface is located parallel to the central axis and has a reference point A to which the transverse wave center wave TC is incident. The second surface has a reflection point B that converts the longitudinal wave center wave PC into a transverse wave center wave TC and reflects it. The third surface has a longitudinal wave transmission point C to which the ultrasonic transducer 12 is attached and which emits the longitudinal wave center wave PC. The incident angle θ1 of the reference point A is set to be between 65° and 75°, and the incident angle θ3 of the reflection point B is set to be between 65° and 75°. In addition, the contact medium 30 is located in an usable angle range α of 5° to 10° with respect to the incident angle θ1.

This application provides a method, system, device, and storage medium for automatically acquiring the velocity of high-resolution acoustic wave test waveforms. The method includes: determining a time window range t1 to t2 for the first half-cycle of the high-resolution test waveform signal, and extracting the signal amplitude and time values ​​corresponding to the time window range based on the measured waveform. This invention proposes an automatic acquisition method based on the first arrival of local minima to automatically acquire and calculate the velocity of high-resolution acoustic wave test waveform signals. The automatically acquired longitudinal and transverse wave velocity values ​​are stable and reasonable, exhibiting high stability and accurately reflecting the physical properties of rocks. This improves reliability and effectiveness. The process is simple, and automatic acquisition of longitudinal and transverse wave waveforms is achieved during rock physics acoustic wave testing.

The application belongs to the technical field of material mechanical property testing and nondestructive testing, and specifically discloses a uniaxial compression ultrasonic stress testing method and device, which comprises the following steps: placing a sample to be tested in a loading device, applying a preload to the sample to be tested and unloading to a zero stress state, collecting the longitudinal wave propagation time, the transverse wave propagation time and the initial length of the sample to be tested in the zero stress state; applying a uniaxial compression load to the sample to be tested, and synchronously collecting the axial load, the piston displacement, the longitudinal wave propagation time and the transverse wave propagation time; calculating the relative change rate of the ultrasonic wave velocity, establishing a coupling relationship model between the uniaxial compression stress and the relative change rate of the ultrasonic wave velocity; and decoupling and inverting the actual stress inside the sample to be tested according to the coupling relationship model. The application solves the problem that the prior art does not fully consider the coupling influence of the microstructure change of the material on the ultrasonic wave signal in the compression process, thereby leading to insufficient precision of the stress inversion model.

The utility model discloses a steel structure building anti -seismic detection device, including base, vibration unit, vibration unit includes the vibration board of sliding setting on the base and sets up the vibration source on the base, and vibration source output is connected with the vibration board, and vibration source is used for driving vibration board to produce the transverse wave vibration, places the unit, and the placement unit includes the placement board of rotation setting on the vibration board, and sets up the limiting component for limiting the rotation of placement board on the vibration board, and placement board is used for placing the steel structure body, and limiting component is used for limiting the rotation of placement board every time ninety degrees, through the vibration source drive of vibration unit sliding setting vibration board on the base produces the transverse wave vibration, and the placement board rotation of placement unit sets up on the vibration board, can make steel structure body in the same plane bears transverse wave vibration after, rotates the placement board ninety degrees and continues to bear longitudinal wave vibration, has broken through the limitation that traditional equipment can only simulate transverse wave in single horizontal direction, has promoted the practical value of detection result.

This invention relates to the field of ultrasonic non-destructive testing technology for butt welds in special equipment, and particularly to an ultrasonic testing device and method for butt welds. The invention proposes an ultrasonic testing device and method for butt welds, comprising selecting a dual-channel phased array detector, connecting phased array linear probes with multiple array elements symmetrically distributed on both sides of the weld, the phased array linear probes being mounted on a probe holder, and each phased array linear probe being connected to a transverse wave wedge. This invention can realize multiple testing modes, including TOFD non-parallel D-scan, TOFD offset non-parallel D-scan, TOFD parallel B-scan, and phased array sector scanning. It aims to solve the technical problems of low testing efficiency and the need for multiple replacements of testing devices in existing ultrasonic testing of butt welds.

The application provides a dipole double-layer casing well imaging method based on an Inception module, forward modeling is performed on a real double-layer casing well model, a dipole excitation mode is adopted, different sizes of double-layer casing well array logging signals are obtained according to the forward model, neural network parameters based on the Inception module are set, and the obtained characteristic signal array is input into a neural network containing the Inception module for training and verification, the training result of the neural network is saved, and the network structure of the neural network containing the Inception module and the model trained by the optimal parameters are used for carrying out longitudinal wave and transverse wave slowness inversion and imaging on the double-layer casing well. The application establishes the relationship between the characteristic signal and the real longitudinal wave and transverse wave slowness graph of the dipole double-layer casing by using the neural network containing the Inception module, can realize fast and high-resolution imaging, and effectively improves the robustness of the neural network.

This invention provides a method for preparing an AlScN piezoelectric coating material with high mechanical properties and high temperature resistance. The method includes: using an alloy target composed of Al and Sc, forming an AlScN piezoelectric functional layer on a substrate surface via magnetron sputtering; and controlling the volume ratio of argon to nitrogen, temperature, sputtering power, deposition pressure, and target-substrate distance during magnetron sputtering to allow the AlScN piezoelectric functional layer to grow in multiple orientations during deposition. The AlScN piezoelectric coating material obtained by this invention exhibits excellent mechanical properties, temperature resistance, and corrosion resistance. When deposited on a substrate, this coating material can simultaneously generate longitudinal waves, longitudinal and transverse waves, and transverse waves to achieve defect detection and stress measurement in steel plates, welds, and steel pipes in various media. Furthermore, it exhibits long-term stable service capability under high temperature and harsh operating conditions without the need for a protective layer, meeting long-term usage requirements, facilitating mass production, and possessing promising prospects for promotion and application.

The application discloses a kind of inorganic cementitious material setting process automatic monitoring method and device based on transverse wave, it is related to civil engineering material performance monitoring technical field, comprising the following steps: S1, obtains the monitoring data of transverse wave pulse from stirring to hardening whole process through inorganic cementitious material;S2, noise data and transverse wave data are screened from monitoring data;S3, according to the twice mutation of propagation time judges initial setting and final setting state.The inorganic cementitious material setting process automatic monitoring method and device based on transverse wave, by real-time monitoring the fluctuation data of transverse wave through newly-poured inorganic cementitious material, effective transverse wave data is screened from monitoring data, and the first wave propagation time of transverse wave is extracted from transverse wave data, to determine the age of initial setting and final setting state change according to the twice sudden decrease of propagation time, realize the nondestructive, continuous, high-precision monitoring of setting whole process.

The embodiment of the application relates to the field of rock physical experiments, in particular to a method for identifying rock pore types, an electronic device and a storage medium, the method comprising the following steps: obtaining ultrasonic longitudinal wave speed and / or ultrasonic transverse wave speed of a target rock sample after ultrasonic longitudinal wave and transverse wave testing under different temperature and pressure conditions; establishing a temperature-pressure and speed covariant fitting equation based on the ultrasonic longitudinal wave speed and / or ultrasonic transverse wave speed under different temperature and pressure conditions; determining a pore type of the target rock sample according to a fitting coefficient in the temperature-pressure and speed covariant fitting equation based on a preset mapping relationship between pore types and fitting coefficients. The application establishes a temperature-pressure and speed covariant fitting equation, extracts a fitting coefficient, and realizes the differentiation of rocks with different pore types based on the fitting coefficient, thereby improving the identification efficiency of pore types.

This invention discloses a reservoir prediction and hydrocarbon detection method based on P-wave and S-wave spectral decomposition, comprising the following steps in sequence: S1. Obtaining P-wave data volume A and S-wave data volume B; S2. Decomposing P-wave data volume A and S-wave data volume B using P-wave seismic interpretation and S-wave seismic interpretation respectively, obtaining P-wave tuned volume X and S-wave tuned volume Y; S3. Picking the tuning frequencies of P-wave tuned volume X and S-wave tuned volume Y respectively; S4. Calculating the P-wave / S-wave velocity ratio and Poisson's ratio using the tuning frequencies of P-wave tuned volume X and S-wave tuned volume Y; S5. Performing reservoir prediction and hydrocarbon detection using the P-wave / S-wave velocity ratio and Poisson's ratio. This invention only uses P-wave and S-wave spectral decomposition technology to calculate the P-wave / S-wave velocity ratio and Poisson's ratio for reservoir prediction and hydrocarbon detection, without the need for complex procedures. The method is simple, low-cost, easy to master and promote, and still applicable to areas with low exploration levels.

A piezoelectric composite substrate for a SAW device having small loss is provided. A composite substrate for a surface acoustic wave device according to one embodiment of the present invention has a piezoelectric single crystal thin film, a support substrate, and a first intermediate layer between the piezoelectric single crystal thin film and the support substrate. In the composite substrate, the first intermediate layer is in contact with the piezoelectric single crystal thin film, and a sound velocity of a transverse wave in the first intermediate layer is faster than a fast transverse wave in the piezoelectric single crystal thin film.

The application relates to the technical field of oil and gas exploration, and discloses a near-surface transverse wave velocity modeling method, device, equipment and medium based on node instrument continuous data, which comprises the following steps: acquiring seismic data continuously collected by a plurality of node instruments; based on the seismic data and the positions of the node instruments, interval range division is carried out on the pseudo surface wave channels corresponding to the node instruments, and the vertical velocity structure of the transverse wave corresponding to each node instrument is determined; based on all the vertical velocity structures of the transverse wave, a three-dimensional transverse wave velocity model of a target region is constructed; and based on the three-dimensional transverse wave velocity model, the converted wave static correction amount of the target region is determined. According to the scheme, the seismic data collected by the node instruments is used, the positions of the node instruments are utilized, interval range division is carried out on the pseudo surface wave channels, and a corresponding transverse wave velocity model is constructed for each node instrument corresponding point position, and a three-dimensional transverse wave velocity model is established, so that more accurate converted wave static correction is realized, and a foundation is laid for more accurate anisotropy migration imaging.

The application provides a method for inverting medium parameters and target position of solid-solid layered medium, comprising the following steps: step 1: measuring the sound velocity of the head wave of the upper solid medium by placing two rectangular piezoelectric transducers on the surface of the solid-solid layered medium; step 2: placing a linear array transducer array on the surface of the solid-solid layered medium for detection, and quantitatively characterizing the position and shape of the interface by using an imaging diagram; step 3: comparing the difference between the measured travel time and the predicted travel time of each interface reflection wave mode to estimate the shear wave sound velocity of the upper solid medium; step 4: screening the target scattering wave from the received multiple echoes, and inverting the longitudinal and transverse wave sound velocities of the lower medium by taking the minimum variance of the target possible point distribution group as the measurement standard; and step 5: the center position of the target possible point distribution group is the positioning result of the target. The technical scheme of the application solves the problem of target positioning of the solid-solid layered medium in the prior art.

The application belongs to the technical field of ultrasonic scalpel, and particularly relates to a long-distance type composite structure ultrasonic scalpel center rod. The application comprises a scalpel main body. The application is applied to single-hole supplementary surgery, adopts a long-distance type composite structure center rod, and is used for reducing indexes according to the difference in the length of the center rod. The stress elimination structure, longitudinal wave transmission structure, stress concentration structure, anti-overflow amplification structure, energy transition structure, amplitude quality balance structure, middle section anti-overflow structure, tail section anti-overflow structure, tail section anti-overflow structure, transverse wave control structure, end transition zone and high amplitude output structure can realize the effect that the energy of the front end center beam of the long-distance type composite structure center rod working surface is reduced by 8-12 dB than that of the rear end beam, so that the center static impedance is greatly reduced, the tissue is instantaneously dehydrated and coagulated, and the specification of the ultrasonic scalpel long single hole and robot surgery in the domestic and international markets is filled.

This invention relates to a hydrodynamic model testing method for ships undergoing transverse free-propulsion. A blower is placed symmetrically fore and aft of the hull. Each blower, along with a corresponding blower speed measurement module and a unidirectional thrust sensor, constitutes a propulsion blower system. During transverse free-propulsion in cross waves, the blower thrust is adjusted by adaptively regulating the blower speed, thus balancing the ship and preventing bow rolling. The measured thrust of the propulsion blower system is processed and converted into the magnitude of the wave force experienced by the ship during transverse free-propulsion. The ship's motion is not constrained by the towing vehicle, and this method solves the problem of transverse free-propulsion dynamics, while avoiding the impact of transverse navigation instability on hydrodynamic testing and analysis. Furthermore, it allows for relatively accurate measurement of transverse wave drift force. The method proposed in this invention is scientifically sound, easy to implement, and has good prospects for widespread application.

The application discloses a microseismic dispersion curve extraction method based on a large nuclear deep convolutional network, and relates to the fields of seismic exploration and deep learning. In view of the problems of insufficient extraction of low-frequency long-wave information, easy mode aliasing and jumping under strong noise of an existing method, the method constructs a training data set containing base order and high-order mode labels through physical driving, and obtains standardized samples through preprocessing and enhancement. The samples are input into a deep convolutional network containing a large receptive field dispersion feature extraction module, a multi-stage coding and multi-modal joint prediction output dispersion curve is output, and then a joint loss function with physical consistency constraint is used to optimize the network to obtain a converged model. The application realizes end-to-end extraction of original microseismic signals to multi-modal dispersion curves, improves the deep stratum detection precision and adaptability to a complex noise environment, and provides high-quality data support for underground medium transverse wave velocity structure inversion.

The present application relates to a kind of environmental noise imaging method for improving the imaging precision of power grid tower foundation, specific steps include: arranging multiple detectors in target exploration area, environmental noise data is collected;Based on environmental noise data, initial three-dimensional transverse wave velocity model is obtained by surface wave tomography inversion technique;Local non-uniform grid encryption processing is carried out to each detector in initial three-dimensional transverse wave velocity model The coarse velocity grid, generate fine velocity grid;And based on the distance between detector and the adjacent grid node of fine velocity grid, fine grid is dynamically updated;The accurate speed value at each detector position is calculated using bilinear interpolation algorithm in the encryption fine velocity grid after updating is completed;The accurate speed value at each detector position in fine grid is used to carry out iterative update to initial three-dimensional transverse wave velocity model, and high-resolution three-dimensional transverse wave velocity structure model is obtained.