53 results about "Wave response" patented technology

The invention belongs to the technical field of grouting compactness detection, and particularly discloses and provides an intelligent detection system and method for the grouting compactness of a bridge prestressed pipeline, and the system comprises a signal acquisition and analysis module, a defect boundary calibration module, a defect recognition and analysis module and a compactness judgment and processing module. The method specifically comprises the steps that acoustic emission and fluctuation response signals are collected in real time through a sensor array arranged on the outer wall of a pipeline, and three-dimensional slurry density distribution is recognized; constructing an inner wall three-dimensional model in combination with a pipeline design drawing, dynamically setting a slurry density threshold value according to a grouting material formula and an environment temperature, and further calibrating a slurry defect boundary; extracting multi-dimensional features such as spatial positions, effective volumes, geometric regularity and types of the defects on the basis of boundaries, and calculating grouting compactness; and finally, according to whether the compactness reaches the standard or not, a grout supplementing early warning instruction or a detection report is automatically generated. According to the method, the reliability of defect identification and compactness calculation under complex working conditions is remarkably improved.

A wind and wave response modeling and ocean current inversion method based on machine learning relates to the technical field of artificial intelligence and ocean information services, and comprises the following steps: (1) data acquisition; (2) data processing; (3) constructing a data set; (4) establishing a sea surface flow velocity inversion model by using a particle swarm optimization machine learning algorithm; and (5) obtaining an optimal sea surface flow velocity inversion model through testing and case analysis. Aiming at ocean and Doppler frequency shift characteristics of the sea surface, the invention provides a particle swarm optimization XGBoost model wind wave Doppler contribution prediction method for the first time, and the wind wave Doppler contribution estimation precision and speed can be effectively improved.

The invention relates to the technical field of ground wire damage detection, and provides a ground wire damage detection method and system based on magnetostrictive guided waves, and the method comprises the following steps: generating a white noise signal through a magnetostrictive transducer to excite a ground wire, and collecting a guided wave response signal of the guided waves; identifying the guided wave response signal through a spectrum analysis model to obtain the inherent frequency characteristic of the ground wire, and obtaining the optimal excitation frequency according to the inherent frequency characteristic and the amplitude frequency mapping relation; adjusting the excitation frequency of the white noise signal according to the optimal excitation frequency to obtain an optimized guided wave signal; identifying the optimized guided wave signal through a defect detection and tension monitoring model to obtain a defect tension detection result; and based on the defect tension detection result, judging the damage level of the ground wire, and generating a detection report. According to the invention, defect detection and tension abnormity monitoring are carried out at the same time, the reliability of ground wire detection is improved, and an effective monitoring means is provided for safe operation of the ground wire.

The invention discloses a distance measurement control method for track mobile equipment based on millimeter wave secondary radar. The distance measurement control method comprises the following five steps: S1, a vehicle-mounted interrogator generates a coding interrogation signal of a millimeter wave frequency band and transmits the coding interrogation signal to a transponder deployed along a track; s2, after a transponder receives the inquiry signal conforming to the predefined coding format, a millimeter wave response signal carrying a unique identity label is generated; s3, the vehicle-mounted receiver extracts an identity label and carrier phase information in the millimeter wave response signal to form an accurate distance measurement value resisting multipath interference; s4, the control unit fuses the accurate distance measurement value and the data of the vehicle-mounted sensor to generate real-time pose information with millimeter-level precision; and S5, the execution mechanism adjusts the operation state of the mobile equipment according to the dynamic control instruction, and cooperative operation or accurate parking control of the track mobile equipment is achieved. According to the millimeter wave secondary radar-based distance measurement control method for the track mobile equipment, the problems of high-precision continuous distance measurement and anti-interference control of the track mobile equipment can be solved.

In order to solve the problems that in an existing hemispherical harmonic oscillator quality leveling technology, the inherent rigid axis positioning efficiency is low, and manual intervention is relied on, the invention provides a method for rapidly positioning the azimuth of an inherent rigid axis of a hemispherical harmonic oscillator based on pulse broadband excitation and quasi standing wave response and a corresponding leveling device. Through an analytical expression of a main standing wave and an auxiliary wave in a second-order four-amplitude resonance working mode, a double-excitation vibration stopping system (comprising two knocking hammers and a vibration stopping hammer with the azimuth difference of 22.5 degrees odd times) is ingeniously designed, and the azimuth of an inherent rigid shaft is quickly positioned by combining orthogonal detection signals. According to the method, the limitation on the excitation direction and the detection direction is relaxed, and through the design of the vibration stopping hammer, the positioning efficiency of the inherent rigid shaft is improved, and the extraction precision of residual vibration on the characteristic parameters can be avoided. The formed hemispherical resonator leveling device provides reliable technical support for batch production of high-precision hemispherical resonator gyroscopes.

The invention discloses a forward modeling simulation method for a multidirectional sea wave induction electromagnetic field. The method comprises the following steps: expressing energy distribution of different propagation directions and frequency components through a spectral function; setting external environment input required by forward modeling according to the seawater depth and geomagnetic field parameters of the research area; after parameter setting is completed, electromagnetic response calculation is carried out on each frequency-direction sampling point; component response is called on a preset frequency set and a preset direction set, linear superposition is carried out by adopting a frequency direction correspondence method, and a total electromagnetic field is obtained; and outputting time sequences and frequency spectrum results of the wind wave induction electromagnetic field, the surge induction electromagnetic field and the mixed wave induction electromagnetic field, thereby providing a reference basis for noise analysis, background interference suppression and target signal identification in electromagnetic detection. According to the method, the limitation of a traditional model is broken through, the electromagnetic interference characteristics under the complex sea condition are represented more truly, and reliable support is provided for noise suppression and target recognition in electromagnetic detection.

The application discloses a dual-mode optical coherence elastography device and method. The device comprises an excitation unit for generating an acoustic field; an imaging unit which is an optical coherence tomography system and is used for detecting the vibration of a sample, i.e. a strain response and an elastic wave response; and a coupling unit which has an acoustic reflection surface with a middle through hole and is used for reflecting the acoustic field generated by the excitation unit so that the coupling between a probe light beam emitted by the imaging unit and the acoustic field emitted by the excitation unit is on the same side of the sample. The application uses a multi-beam optical coherence tomography system to emit two or more probe light beams for dual-mode elastography, and can simultaneously obtain high-resolution strain information and quantitative elastic information of the sample, thereby solving the problem that the prior art cannot simultaneously perform strain imaging and elastic wave imaging.

The application discloses a lightning stroke event online guided wave monitoring method and device for a composite material structure, and comprises the following steps: arranging a plurality of piezoelectric sheets in a composite material structure to be monitored to form a sparse piezoelectric array; when the outer surface of the composite material structure to be monitored is struck by lightning, lightning impact force guided wave response mechanical quantities are excited, and the generated mechanical quantities are conducted to the piezoelectric sheets; the lightning impact force guided wave response mechanical quantities are converted into lightning impact force guided wave response signals; the lightning impact force guided wave response signals are transmitted to a data acquisition module through an online sensing mode; the lightning impact force guided wave response signals are subjected to direct current component removal and filtering pretreatment; and through a lightning impact force guided wave response signal imaging monitoring mode of the sparse piezoelectric array, lightning attachment point impact force passive imaging results are constructed. The lightning stroke event online guided wave monitoring method and device can not only improve the quality of lightning piezoelectric guided wave response signals, but also can perform high-precision positioning and imaging on lightning attachment points.

A defect detection method is provided for a pressurized pipe having at least one defect. According to the method, an acoustic source generates a probing wave of a frequency range from 10 kHz to 100 kHz, where the probing wave is scattered by the at least one defect to create a reflected wave; an acoustic receiver measures a wave response to obtain a measured response, where the measured response is attributed essentially to a superposition of the probing wave and the reflected wave; and a computer device processes the measured response to locate the at least one defect.

The present application relates to the technical field of pipeline nondestructive testing, and discloses a pipeline defect diagnosis method based on guided wave technology. The method obtains original guided wave response signals under multiple excitation frequencies through a guided wave sensor array arranged on the outer wall of the pipeline, performs multi-stage analysis and separation on the signals, extracts a set of independent wave mode components directly related to the defects, including longitudinal wave components, torsional wave components and surface wave components. According to the propagation time delay and energy distribution of each component, a multi-dimensional defect feature tensor is constructed, input into a trained pipeline defect discrimination network for feature mapping and abstraction, and a preliminary diagnosis report of the defect category and geometric profile is output. Combined with the pipeline service environment parameters, the physical field coupling correction is carried out to generate the final diagnosis result. The method solves the problems of serious mode aliasing and poor environmental adaptability in the traditional guided wave technology, and realizes accurate identification and positioning of defects.

The application discloses an epitaxial method of a very long wave InAs / InAsSb superlattice infrared detector and relates to the technical field of semiconductor devices. The method comprises the following steps: first, preheating a GaSb substrate; then, growing an InAs layer by applying In beam and As beam; then, growing a transition layer by synchronously increasing As and Sb beams at equal increments; then, growing an InAsSb layer by stabilizing As and Sb beams; then, synchronously adjusting As and Sb beams at equal decrements to restore the initial As beam and make the Sb beam zero; and then, repeating the growth process of each layer to form a superlattice structure, and obtaining a target epitaxial wafer through post-processing. The application realizes smooth transition of the InAs layer and the InAsSb layer by precisely controlling the beam and the V / III ratio, obtains a high-quality superlattice structure, guarantees the very long wave response characteristics, and significantly improves the response rate, the detection rate and the working stability of the detector.

This invention belongs to the field of wave height prediction technology and discloses a wave prediction method that considers the evolution characteristics of the marine environment. The method includes the following steps: (1) collecting historical data on significant wave height, average period, and wind speed of waves in the target sea area and processing the data; (2) performing seasonal trend decomposition on the significant wave height sequence to obtain trend terms, seasonal terms, and residual terms; (3) calculating wind and wave response indices based on wind speed changes, wave average period changes, and significant wave height changes; (4) generating wind and wave response state weights and using these weights to adjust the influence of different historical time steps, different wave height components, and meteorological and oceanographic elements in the prediction process; (5) correcting the prediction contributions of the trend terms, seasonal terms, and residual terms with weights, and reconstructing the predicted future significant wave height. This invention can improve the stability of significant wave height prediction during periods of significant wind speed changes or sea state transitions.

The invention discloses a seismic reflected wave response high-fidelity forward modeling calculation method suitable for a deep saline water layer, and the method comprises the steps: S10, building a saline water layer pore fluid rock physical model according to the development characteristics of the saline water layer, and calculating the viscosity, density, longitudinal wave velocity and bulk modulus of the saline water layer pore fluid; s20, according to the development characteristics of the salt water layer, establishing a multi-scale rock physical model of the salt water layer to obtain an equivalent stiffness matrix of the salt water layer; s30, establishing a geology-earthquake forward modeling model; s40, calculating a salt water layer reflection and transmission coefficient matrix by using a propagation matrix method; and S50, calculating the reflected wave seismic response of the salt water layer. According to the method, seismic rock physical modeling and seismic forward modeling technologies are combined, the viscoelastic characteristic and the thickness of the salt water layer are considered, the actual geological condition is better met, the cost is low, the precision is high, the deep salt water layer seismic reflected wave response can be rapidly and accurately calculated, and theoretical support is provided for evaluation and optimization of the carbon storage space.

The invention relates to the technical field of LCD (liquid crystal display) detection, and discloses a sensor-based LCD defect detection system, which comprises a frequency sweep synchronous excitation module for generating a frequency sweep excitation signal and an orthogonal reference signal; a pixel addressing driving module; the integrated multi-mode sensing assembly is used for synchronously detecting a pixel transient electric field and acoustic elastic wave response in a non-contact manner; the multi-channel synchronous data acquisition and phase-locked analysis unit is used for performing digital phase-locked demodulation on the response signal; and a master control and data analysis system. And the main control system controls frequency scanning, constructs a multi-physical field dynamic response spectrum for each pixel according to demodulation data, and finally realizes defect detection and classification by comparing and analyzing the response spectrum and a reference spectrum. According to the method, traditional single-point measurement is replaced by dynamic spectral line characterization, and multi-physical field information is fused, so that the detection sensitivity of weak defects is remarkably improved, and automatic and accurate diagnosis of defect types is realized.

The present invention discloses a pre-drilling electromagnetic wave antenna system and a measurement method, wherein the system includes a front short section, a screw and a remote detection instrument, wherein the front end of the front short section is connected to the drill bit, and the rear end of the front short section is connected to the remote detection instrument via a screw. The front short section includes an inclined transmitting antenna and a group of axial receiving antennas, and the remote detection instrument includes an inclined transmitting antenna, a group of axial receiving antennas and multiple groups of three-axis orthogonal receiving antennas. The present invention can realize the function of pre-drilling at a large distance in front of the drill bit, and multiple groups of receiving antennas with different source distances can ensure that electromagnetic wave responses within different ranges of the surrounding space can be received, so that information on undrilled strata at different depths in front of the drill bit can be obtained through inversion. The present invention helps to solve difficult problems such as precise landing in complex reservoir drilling, elimination of pilot wells, improvement of drilling encounter rate, drilling risk control, reservoir optimization, and comprehensive and detailed evaluation of oil reservoirs.

The application relates to a liquid metal phased array antenna and belongs to the technical field of antennas, which solves the problem of limited electromagnetic wave response phase adjustment of the phased array antenna in the prior art. The liquid metal phased array antenna is characterized in that it comprises: a plurality of antenna units distributed in an array; the antenna unit comprises: a flexible dielectric layer and liquid metal; the flexible dielectric layer is provided with a linear microchannel, and the liquid metal is filled in the linear microchannel. The application adjusts the length of the internal liquid metal by supplying pressure in the linear microchannel cavity, thereby realizing the morphological reconstruction of the antenna unit. The reconstruction state is continuous, and the phase control coverage range is large.

The present invention relates to the field of semiconductor electronic device technology, and provides a photodiode and a method for preparing the same. The photodiode comprises at least: a substrate having a first surface and a second surface relative to each other; a device layer disposed between the first surface and the second surface, sequentially comprising an N-type doped region adjacent to the first surface, an undoped intrinsic layer (I layer), and a P-type doped region adjacent to the second surface; a cutoff ring disposed around the periphery of the upper end of the substrate and spaced apart from the P-type doped region, with the upper surface of the cutoff ring and the second surface located in the same plane; a photosensitive region located above the upper surface of the device layer and at least above the P-type doped region; an oxide ring disposed in the peripheral region of the photosensitive region, with an oxide layer disposed between the ring and the second surface; wherein the P-type doped region comprises a deep doped region and a shallow doped region disposed adjacent to each other, and the deep doped region and the shallow doped region are located in the photosensitive region. A photodiode with such a structure can improve the short-wave response capability of the photodiode.

The invention relates to the technical field of ocean engineering and renewable energy sources, and discloses a back wave water inlet type oscillating water column structure based on long wave reduction and energy extraction, which comprises a wave absorption main body, a support, a pile foundation and a turbine generator set with an air turbine, and further comprises an arc-shaped moving door, the two arc-shaped moving doors are connected into an interlayer of the wave absorbing body in a sliding mode, and a back water inlet matched with the two arc-shaped moving doors is formed in one side of the wave absorbing body. Water level modulation caused by the phase difference between the liquid level fluctuation of the cavity and the liquid level fluctuation outside the cavity is formed to reduce waves. According to the technical scheme, wave response optimization under different wave periods can be achieved by synchronously adjusting the size of the water inlet, the energy extraction efficiency is improved, the wave transmissivity is reduced, and the device is suitable for various layout forms of offshore and open sea areas and has the good wave adaptability and the integration characteristic of wave reduction and energy extraction.

The application discloses a high-performance Helmholtz nanoresonator responding to ultrasonic waves and a preparation method thereof. The method comprises the following steps: preparing a CeO2 mesoporous hollow skeleton by using a hydrothermal synthesis method in a one-pot method, covering a SiO2 shell layer on the surface of the CeO2 mesoporous hollow skeleton by using an in-situ polymerization method, and controlling the thickness of the SiO2 shell layer by adjusting reaction conditions to prepare the CeO2@SiO2 Helmholtz nanoresonator. The preparation process is simple, the prepared nanoresonator is not only uniform in structure, but also has high ultrasonic wave response performance, and has a wide application prospect.

The present application relates to the technical field of rock physics and reservoir geophysics, and particularly relates to a rock physics surface modeling method, system, storage medium and electronic device, the method comprising: assigning the elastic modulus of the carbonate rock along the logging axial direction to the rock matrix, adding the preset pores and / or preset fractures of the carbonate rock along the logging axial direction to the rock matrix to obtain a rock dry skeleton; adding the parameter data of the fluid to the rock dry skeleton, calculating the wave response characteristics of the carbonate rock containing the fluid, establishing a physical point model of the carbonate rock containing the fluid, unifying the physical point models corresponding to the multiple logging respectively to obtain a physical surface model of the carbonate rock containing the fluid, combining the advantages of the point and line modeling methods, realizing high-precision and unified rock physics surface modeling, and being suitable for surface modeling of complex carbonate rock reservoirs and the like.

The invention provides a medium-voltage cable distributed monitoring method based on electromagnetic traveling wave sensing, and belongs to the technical field of cable monitoring, and the method comprises the steps: employing electromagnetic sensing nodes disposed in a multi-voltage power supply network to synchronously collect an initial traveling wave response signal, extracting the traveling wave characteristic index, and calculating the traveling wave characteristic index of the initial traveling wave response signal; identifying the traveling wave characteristic indexes according to the difference characteristic template, and determining a first traveling wave boundary used for representing and distinguishing the low-voltage cable area and the medium-voltage cable area and a second traveling wave boundary used for representing and distinguishing the medium-voltage cable area and the high-voltage cable area; and marking a medium-voltage cable area by using the first traveling wave boundary and the second traveling wave boundary, after marking a medium-voltage electromagnetic sensing node corresponding to the medium-voltage cable area, receiving a real-time traveling wave response signal transmitted by the medium-voltage electromagnetic sensing node, and carrying out single-phase earth fault monitoring on the medium-voltage cable area according to the real-time traveling wave response signal. And outputting a monitoring early warning signal.

The application provides a kind of based on super surface dual-frequency non-diffractive multi-beam antenna and design method, it is related to electromagnetic field, antenna includes unit structure, unit structure includes first layer metal patch, second layer metal patch and third layer metal patch;First layer metal patch is sensitive to high-frequency electromagnetic wave response, and third layer metal patch is sensitive to low-frequency electromagnetic wave response.Through the parameter of first and second layer patch is respectively conditioned, the array reflection phase of array unit at two operating frequencies is realized independent control, and then the non-diffractive beam array reflection phase distribution is realized according to actual needs, realizes dual-frequency non-diffractive focusing effect, according to generalized Snell law, further realizes for non-diffractive beam arbitrary angle deflection, finally the superposition of multiple single-beam array reflection phase distribution can be realized multi-beam non-diffractive.The application has the advantages of small array, wide focusing range, flexible beam direction control and simple manufacturing.

The present invention provides a fatigue analysis method, electronic device, and medium for an offshore floating wind turbine foundation. The present invention establishes a multi-load fatigue analysis method based on stress superposition, linearly superimposing the time-series tower bottom load response, time-series mooring response, and time-series wave response of the same working condition to obtain a stress time history curve for the corresponding working condition; performing rain flow counting on the stress time history curve and combining it with the S-N curve to obtain the total fatigue damage of the working condition; and weighting the total fatigue damage of all working conditions within the target service time of the wind turbine foundation to obtain the fatigue damage of all working conditions. The present invention fully considers the influence of each load on an overall scale, matches different loads of the same working condition, is applicable to a variety of complex wind and wave coupling situations, superimposes the stress time series of different loads and performs fatigue processing to obtain the fatigue damage of the wind turbine foundation under all working conditions under multiple load components, thereby improving the accuracy of fatigue damage analysis.

The invention discloses an FPV system design method based on forward wave performance, and belongs to the technical field of floating type photovoltaic systems, and the method comprises the following steps: S1, collecting and processing key design elements of an FPV system, S2, calculating the boundary and step length of a design variable by using a dimensionless parameter analysis normal form, S3, calculating the related data of working conditions and forward wave performance, and S4, calculating the design parameters of the FPV system. The method comprises the steps of S1, calculating a working condition name table and a wave-following property table according to the working condition name table and the wave-following property table, S2, calculating a local wave-following property map and an overall wave-following property map of a target array of the FPV system according to the content of the working condition name table and the wave-following property table, S5, obtaining a design interval of FPV system parameters through a map analysis method, S6, limiting the design interval in combination with specific conditions to obtain specific values of design elements of the FPV system, and S5, calculating the wave-following property of the target array of the FPV system according to the specific values of the design elements of the FPV system. By the adoption of the method, the response characteristics of the FPV system when the FPV system deals with the wave load are reflected along the wave, and meanwhile optimization design of key parameters of the FPV system is reversely guided.

According to the deepwater wave absorbing beach curved surface shape optimization method and device, the storage medium and the computer equipment provided by the invention, segmentation optimization is performed by combining the non-uniform distribution characteristic of wave energy, so that the method has good geometric expression ability and segmentation adjustability; the segmentation density and the configuration structure can be flexibly adjusted according to the wave characteristics and the pool scale, the problem of low efficiency caused by the fact that a traditional empirical design method depends on manual trial and error is effectively solved, meanwhile, accurate matching of the curved surface shape and the actual wave reduction requirement is ensured, the area close to the water surface has the higher segmentation density, and the wave reduction effect is improved. The adjustability of the geometric contour of the area and the wave response matching degree are enhanced, and therefore fine control over the curved surface parameters of the wave absorbing beach is achieved. Besides, by constructing a unified segmentation strategy and an optimization path, the reliability of an optimization result is improved, and the number of times of physical model tests is greatly reduced, so that the design cost is reduced, and the design period is shortened.

The application belongs to the technical field of grouting compactness detection, and specifically discloses a bridge prestressed pipe grouting compactness intelligent detection system and method. The system comprises a signal acquisition and analysis module, a defect boundary calibration module, a defect identification and analysis module, and a compactness judgment and processing module. Specifically, the sensor array arranged on the outer wall of the pipe is used to collect acoustic emission and wave response signals in real time, and identify the three-dimensional grout density distribution. The inner wall three-dimensional model is constructed in combination with the pipe design drawing, and the grout density threshold is dynamically set according to the grouting material formula and the environmental temperature, so as to calibrate the grout defect boundary. Based on the boundary, the spatial position, effective volume, geometric regularity and type of the defect are extracted, and the grouting compactness is calculated. Finally, according to whether the compactness meets the standard, a grouting warning instruction or a detection report is automatically generated. The application significantly improves the reliability of defect identification and compactness calculation under complex working conditions.

This invention relates to a dual-mode rocker-plate wave energy generation device and energy harvesting method based on a stepped moon pool. At least one moon pool is set within a square barge carrier. A rectangular step is set at the bottom of the moon pool, and a rocker-plate float is installed inside the cavity, with a rotating shaft passing through the center of the float. Slots perpendicular to the surface of the square barge carrier are respectively opened on two opposite side walls of the moon pool cavity. A piston rod is slidably connected within the slots, with one end of the piston rod rigidly connected to the end of the adjacent rotating shaft via a crank-connecting rod, and the other end connected to a hydraulic transmission power generation system. The rectangular step within the moon pool amplifies the wave response amplitude, causing the heave-roll dual-degree-of-freedom rocker-plate assembly to generate heave and roll motions. The rotating shaft converts the wave energy accumulated in the expanded moon pool into electrical energy through the hydraulic transmission power generation system. This invention achieves an organic unity of wave focusing effect, efficient energy harvesting, wide-frequency response, and structural durability, providing a reliable technical solution for the large-scale application of wave energy power generation technology.

The invention relates to the technical field of geophysical exploration signal processing, and relates to a single-channel seismic data surface multiple suppression method based on wavelet space variation compensation. Comprising the steps of constructing a one-dimensional forward modeling model; reconstructing pseudo two-dimensional data and introducing wavelet space variation; constructing an objective function to initialize a primary wave and an operator; carrying out adaptive threshold SVD constraint solution on a surface correlation operator; performing L1 norm constraint inversion to solve primary wave response; judging whether the residual error is converged or not, and if the residual error of the target function is greater than a set value, returning to the optimization algorithm for introducing the L1 norm in the inversion process of the target function; otherwise, jumping out of circulation, and outputting a primary wave result. According to the method, the multiple suppression effect and the stratum interpretation reliability can be remarkably improved, and efficient technical guarantee is provided for safe site selection of clean energy projects such as offshore wind plants; according to the method, the definition and accuracy of the processed seismic section are effectively enhanced, the explanation accuracy is improved, and the reliability of offshore wind plant site assessment is also greatly improved.

The application discloses a lightning stroke piezoelectric wave online sensing method and device, comprising the following steps: arranging a piezoelectric sheet on the back of a composite material structure to be monitored; the front of the composite material structure to be monitored is subjected to a lightning stroke; the piezoelectric sheet converts a mechanical quantity of a lightning stroke wave response into a lightning stroke piezoelectric wave response signal, and transmits the lightning stroke piezoelectric wave response signal to an optical transmitter through a wire for short-distance transmission; the optical transmitter converts the lightning stroke piezoelectric wave response signal into a lightning stroke piezoelectric wave response optical signal, and transmits the lightning stroke piezoelectric wave response optical signal through an optical fiber for long-distance transmission; and an optical receiver receives the lightning stroke piezoelectric wave response optical signal, and converts the lightning stroke piezoelectric wave response optical signal into a lightning stroke piezoelectric wave response signal which is output to a data acquisition device. The lightning stroke piezoelectric wave online sensing method and device are adopted, the cathode of the piezoelectric sheet is short-circuited to the structure to be monitored, the resistive voltage generated in the conduction of the lightning current is avoided to cause damage of the sensor, and meanwhile, the quality of the lightning stroke piezoelectric wave response signal is improved.

The present disclosure relates to a method and system for transmitting data, a master module. The system comprises: a first channel; a master module connected to a first slave module through the first channel; and a second channel, the bandwidth of the second channel is greater than that of the first channel, and the master module is also connected to the first slave module through the second channel; wherein, in response to first data to be transmitted to the first slave module, the master module obtains the level of the first data; in response to the level of the first data not being the lowest level, the master module generates a wave request frame and sends the wave request frame to the first slave module through the first channel to request the first slave module to generate a wave response frame; after the master module receives the wave response frame through the first channel, the master module generates a first state frame and sends the first state frame to the first slave module through the first channel to inform the first slave module that it is allowed to transmit the first data to the master module through the second channel.