265 results about "Wave speed" patented technology

The invention relates to the technical field of power distribution network fault positioning, in particular to a power distribution network fault positioning method based on traveling wave detection, and the method comprises the following steps: S1, distributed detection network construction and signal collection: collecting a three-phase current traveling wave signal in real time; s2, time-frequency joint analysis and feature extraction: extracting time-frequency energy distribution features; s3, intelligent screening of effective fault wave heads: screening out the effective fault wave heads; s4, initial arrival time parameter determination: determining the initial arrival time of each detection point; s5, according to topology self-adaptive error correction, transmission path wave velocity deviation is corrected through line parameter dynamic compensation, and clock errors of the asynchronous detection device are eliminated through adjacent node clock difference estimation; and S6, multi-source data fusion and fault positioning: resolving space coordinates of fault points. According to the invention, the method improves the recognition accuracy of fault features, and solves the problems of poor anti-interference capability and high misjudgment rate of a single feature in a conventional method.

The invention relates to the technical field of power systems, and discloses a distribution line fault positioning method and system based on traveling wave distance measurement. The method comprises the following steps: injecting a zero-mode signal through an electrified pulse coupler, carrying out wave velocity hierarchical analysis on a mixed line impedance node to obtain a propagation parameter matrix, generating an empty-mode echo by utilizing mode conversion of a fault asymmetric point, screening by adopting a frequency domain fingerprint identification algorithm to obtain a pure fault signal, and carrying out fault detection on the pure fault signal. And three-dimensional fault coordinates are obtained based on reverse time-distance mapping processing. According to the invention, the problem of accurate positioning of the fault point in the live-line operation state of the hybrid distribution line is solved, and the fault positioning accuracy and the power supply reliability are improved.

The invention discloses a micro-seismic multichannel data processing method and system based on a DBSCAN algorithm, and belongs to the technical field of micro-seismic monitoring. According to the invention, through feature vector construction and optimization distance calculation, the clustering reliability is enhanced; a multi-dimensional feature vector Xi containing P-wave refinement arrival time ti, an amplitude Ai and space coordinates (xi, yi, zi) is constructed, distance calculation is performed by combining a normalized cosine distance with wave velocity constraint, a micro-seismic wave propagation rule is fully utilized, the discrimination capability of DBSCAN clustering on physical consistency is enhanced, and the robustness of a screening result is improved, so that noise interference can be effectively processed in a complex environment, and the accuracy and the robustness of the screening result are improved. And the stability and the reliability of a micro-seismic positioning result under different geological conditions are ensured.

The invention discloses a power grid fault positioning system and method based on traveling wave distance measurement, relates to the technical field of fault analysis, and solves the technical problems that traveling wave feature analysis, temperature compensation and high-precision synchronization technologies are not effectively integrated, and rapid and accurate fault positioning of a smart power grid is difficult to meet. Through the technical combination of dynamic temperature compensation, high-precision time synchronization and intelligent fault classification, the bottlenecks of traditional traveling wave distance measurement in the aspects of precision, reliability and intelligence are systematically solved, temperature sensors are deployed at key nodes of a cable, the temperature is monitored in real time, the wave speed is dynamically corrected through a formula, the overall error is reduced, and the fault location accuracy is improved. Meanwhile, an optical fiber two-way time transmission method is combined, transmission delay errors are reduced, synchronization reliability is improved, finally, a mapping library is constructed through laboratory simulation and field data, a Euclidean distance matching algorithm is combined, fault reasons are automatically recognized, and rapid positioning of the faults and accurate recognition of the fault reasons are achieved.

The invention discloses an underground space surrounding rock excavation damage area testing method, which belongs to the technical field of rock mass damage testing, and comprises the following steps: sampling rocks with different depths, carrying out ultrasonic testing, and determining rock sample attenuation characteristics and wave velocity; determining a comprehensive damage index range of the rock samples with different damage grades; then, sensors are arranged in the excavation process to collect ultrasonic and acoustic emission data; then, an initial calculation model is constructed, and a surrounding rock three-dimensional wave velocity model is obtained through inversion of collected data; and finally, determining a damage grade according to the comprehensive damage index, and marking in the model to realize damage area testing. According to the method, the mapping relation between the damage degree and the wave velocity change is established, the comprehensive damage index range threshold value of different subareas is provided, quantitative and gradable classification is achieved, the three-dimensional wave velocity model is inversed based on test and monitoring data, and three-dimensional presentation and grading labeling of the damage area are achieved.

The invention discloses a traveling wave fault location improvement method for power distribution network fault location analysis, relates to the technical field of power distribution networks, and solves the problems that a traditional single wave velocity model causes location deviation, and particularly, false fault points are easily generated at the joint of a cable and an overhead line due to refraction and reflection. And calculating an amplitude difference mean value under different translation amounts, automatically identifying an optimal time alignment point, and locking an association time difference t1. According to the process, time errors caused by signal distortion, asynchronous sampling and the like can be effectively corrected, the time difference precision is improved from the microsecond level to the nanosecond level, a foundation is laid for follow-up precise positioning, a plurality of correlation points are randomly selected in a locked range interval, a corrected waveform is constructed based on the attenuation proportion and repeated verification is carried out, and the time difference precision is improved. Screening an optimal solution through a feature mean value minimization algorithm; the mechanism can effectively inhibit the error of a single measuring point, and improves the robustness of a positioning result through the statistical average effect.

The invention relates to the technical field of discharge monitoring and early warning, in particular to a partial discharge real-time monitoring and early warning system based on multi-source data fusion, which is characterized in that decision tree classification is carried out on a mixed transient signal flow through a signal physical separation module, and pure electromagnetic wave speed type and mechanical wave speed type signal sources are separated; the feature marking module extracts feature points with a unified time reference and marks physical attribute categories; the double-path credibility fusion module executes time difference logic verification on the two types of feature points, a credible discharge event is marked only when an electromagnetic wave verification result and a mechanical wave verification result are logic values 1 at the same time, event confidence parameters are generated through dynamic confidence fusion, and physical interlocking verification and uniqueness locking are achieved; the anti-interference response module dynamically adjusts a response threshold value based on the event confidence parameter, and only triggers a targeted response to the threat which is physically and essentially confirmed to be real discharge and has confidence reaching the standard; the problem of distinguishing a real discharge event from multi-source interference is solved, and the real discharge event is reliably identified.

The invention discloses a tunnel micro-seismic enhanced positioning method and system based on a DAS and a blasting active source signal. The method comprises the steps that firstly, optical fibers are arranged on the surface of a tunnel wall and in a drill hole; blasting the tunnel face to generate a blasting active source signal with known time and space; then, a blasting active source signal is collected through a DAS system, and P wave arrival time of each monitoring point on the optical fiber is recorded; establishing and optimizing a wave velocity field partition model according to the spatio-temporal information of the blasting active source signal and P wave arrival time of each monitoring point on the optical fiber; and when a micro-seismic event occurs in the surrounding rock, the optimized wave velocity field partition model and P wave arrival time measured at each monitoring point on the optical fiber are utilized, a geometric algorithm is combined to invert and position the micro-seismic event, and a positioning result is output. The system comprises a signal acquisition system, an optical fiber network and a DAS system. The method has the advantages that the wave velocity field model is optimized and dynamically updated by using the tunnel face blasting signal, and the distributed sensing is performed by using the DAS system, so that the capability of monitoring and evaluating the micro-seismic event of the tunnel is remarkably enhanced.

The invention relates to the technical field of earthquake monitoring, and discloses a comprehensive earthquake prediction method, which comprises the following steps of: acquiring a continuous micro-motion data sequence to reconstruct an empirical green function sequence, and dividing the empirical green function sequence into a compression phase subset and a stretching phase subset by utilizing a synchronously acquired theoretical earth tide stress phase; respectively extracting a causal branch waveform corresponding to the positive time axis and a non-causal branch waveform corresponding to the negative time axis, and determining a weight index for inhibiting the non-structural interference by calculating a reciprocity residual error between a causal wave velocity offset and a non-causal wave velocity offset; correcting a wave velocity offset mean value by using the weight index to obtain a stress sensitivity coefficient reflecting the stress state of the earth crust medium; according to the method, a physical criterion is established by using an elastic wave propagation reciprocity principle, decoupling of medium attribute change and noise source spatial drift is realized, and visual wave velocity offset induced by environmental interference is eliminated.

The invention discloses a cable defect detection method and device, and relates to the field of power equipment fault detection, and the method comprises the steps: generating N electric signals with different frequencies in a preset frequency range, inputting the electric signals into a target cable, testing the input impedance of the target cable under the N electric signals with different frequencies, the broadband impedance of the target cable in the frequency range is obtained; according to the broadband impedance, generating an impedance amplitude and an impedance phase of the target cable at each preset frequency point, and constructing an impedance matrix; inputting the impedance matrix into a fault classification model, and identifying and outputting the category of the target cable through the fault classification model; and if the target cable has a fault, extracting the resonant frequency with the maximum amplitude in the broadband impedance amplitude spectrum of the target cable, and determining the fault position of the target cable through a fault positioning model according to the resonant frequency with the maximum amplitude and the typical wave velocity of the target cable. According to the invention, the fault of the target cable can be automatically, quickly and accurately identified, and the fault position can be positioned.

The invention relates to the technical field of wireless communication, and discloses an information source number detection method and system based on a non-circular signal. The method comprises the following steps: calculating a compensation sample covariance matrix of a received signal, and obtaining a sample canonical correlation coefficient through Takagi decomposition of the compensation sample covariance matrix; constructing a marginal likelihood function of the maternal typical correlation coefficient; taking a sample canonical correlation coefficient as an estimated value of a corresponding matrix, and establishing an estimated statistic by applying a minimum description length criterion; and obtaining the number of the parent typical correlation coefficients when the estimation statistic is minimized, and taking the number as an estimation value of the actual number of the non-circular signals. According to the method, the characteristic that the non-circular signal compensation covariance is not zero is fully utilized, the marginal likelihood function with the minimum redundancy parameters is adopted to construct the statistics, high-precision estimation of the number of the non-circular signals can be achieved, and necessary guarantee is provided for practical application scenes such as direction of arrival estimation and wave velocity formation.

The invention belongs to the technical field of mine safety monitoring and rock mass engineering detection, and particularly discloses a method for constructing a non-uniform wave velocity field model of an underground mine, which comprises the following steps: selecting a plurality of rock materials, manufacturing a plurality of regular blocks, measuring a reference wave velocity, manufacturing a rock test piece, and carrying out a wave velocity test experiment; a wave velocity quantification formula is constructed through fitting experiment data; constructing a three-dimensional block model according to the spatial features of the prediction area, dividing the three-dimensional block model into a plurality of block unit models, and generating a lithologic block unit model through spatial interpolation; and constructing a three-dimensional engineering geological representation model, extracting geological feature data in the three-dimensional engineering geological representation model, and performing wave velocity assignment on all lithologic block unit models by using a wave velocity quantification formula to obtain a three-dimensional non-uniform wave velocity field model. According to the method, the wave velocity field model better conforming to the actual condition of the underground mine can be constructed, the limitation of constant wave velocity assumption in a traditional model is overcome, and the reliability of micro-seismic monitoring is improved.

A mixed traffic flow-oriented vehicle eco-driving control method and an electronic device are provided. The method includes: calculating a gathering wave speed and a dissipation wave speed at an intersection, and obtaining a farthest queue point position of a connected and autonomous vehicle at a downstream intersection and a time, acquiring predicted trajectories of the manual-driving vehicle; constructing and solving an optimal ecological reference trajectory planning model of the connected and autonomous vehicle, obtaining an acceleration curve of the connected and autonomous vehicle, and acquiring an ecological reference trajectory of the connected and autonomous vehicle; and setting a risk factor based on the predicted trajectories of the manual-driving vehicles, constructing a tracking target based on the risk factor and the ecological reference trajectory, using a model predictive control for solving, and obtaining a control input of the connected and autonomous vehicle.

The invention provides a roadway surrounding rock dynamic deformation prediction method and device, equipment and a storage medium, and the method comprises the steps: carrying out the feature extraction of the dynamic data parameter information of the roadway surrounding rock, so as to determine the propagation speed change information of a stress wave in the surrounding rock and the instantaneous strain change rate of the surrounding rock under dynamic loading; determining a wave velocity change index according to the propagation velocity change information of the stress wave in the surrounding rock; determining an instantaneous deformation strain rate index according to the instantaneous strain change rate of the surrounding rock under dynamic loading; inputting the wave velocity change index and the instantaneous deformation strain rate index into a pre-trained machine learning model to generate a surrounding rock deformation index; and performing surrounding rock change state evaluation based on the surrounding rock deformation index. By implementing the method disclosed by the invention, the influence of instantaneous stress wave propagation caused by dynamic loading on the surrounding rock can be effectively combined in the dynamic deformation prediction process of the roadway surrounding rock, so that the accuracy and practicability of a dynamic deformation prediction result of the surrounding rock are effectively improved.

The invention provides a Prony algorithm-based cable segment wave velocity acquisition method, device and system, and a medium, and the method comprises the steps: testing a to-be-tested cable, and obtaining a cable signal transfer function; on the basis of the cable signal transfer function, in combination with cable joint distribution, constructing a cable signal approximation function based on a Prony method; constructing a linear prediction model of the cable signal based on the cable signal approximation function; performing denoising processing on the linear prediction model based on a singular value decomposition method to obtain a denoised linear prediction model; solving the denoised linear prediction model to obtain an attenuation coefficient; and calculating the segmented wave velocity of the cable based on the attenuation coefficient. According to the method, the Prony estimation method is combined with the singular value decomposition noise reduction algorithm, high-precision extraction of attenuation constants and segmented wave velocity decoupling are achieved, and then the electrical distance positioning precision is improved.

The invention discloses an inertial navigation underwater path tracking method and system for a complex marine environment, and relates to the technical field of inertial navigation. The method comprises the following steps of AUV navigation monitoring, underwater tracking position correction, underwater path tracking stability analysis and underwater path tracking stability change analysis. According to the method, the IMU acceleration change condition and the DVL wave velocity quality fluctuation condition in the INS are monitored, IMU acceleration change analysis and DVL wave velocity quality fluctuation analysis are carried out respectively, then an underwater tracking position correction scheme is decided based on the two analysis results, and underwater path position credibility analysis is carried out at the same time. And whether path stability correction measures are taken or not is judged according to the stability condition of underwater path position tracking of the AUV, and then whether path correction adjustment is executed or not is determined, so that the precision of the underwater path tracking position is improved, and the problem that the accuracy of the underwater path tracking position is reduced in the prior art is solved.

The invention provides a system and a method for positioning a gas leakage part of a gas storage. The method comprises the following steps: emitting an optical signal to a first optical fiber arranged in the gas storage; the receiving point receives an optical signal which is changed due to the influence of ultrasonic vibration generated by the leakage point of the gas storage at the monitoring point; an optical signal which is changed due to the influence of ultrasonic vibration generated by a leakage point is converted into an electric signal; converting the electric signal into the length of the first optical fiber from the monitoring point to the receiving point; calculating position information of the monitoring point according to the length of the first optical fiber of the receiving point; calculating the wave velocity of ultrasonic waves; obtaining time differences of light signal changes of different monitoring points; and the position of the leakage point is calculated according to the position information of different monitoring points, the time difference of optical signal change of different monitoring points and the speed of ultrasonic waves. According to the invention, the detection accuracy and convenience can be improved.

The invention discloses an equivalent deformation modulus calculation method and system for a complex uneven rock mass and a medium. Relates to the technical field of rock engineering. The method comprises the following steps: partitioning according to geological information of rock masses and counting proportions, then respectively carrying out sound wave testing on the rock masses in different regions to obtain single-hole sound wave velocities, and calculating deformation moduli of the rock masses in each region by utilizing a correlation relationship between the single-hole wave velocities and the deformation moduli; a mixed equivalent model of strain coordination and stress coordination is constructed based on the rock mass strain energy proportion so as to calculate the equivalent deformation modulus of the special uneven rock mass; a new thought is provided for obtaining deformation modulus parameters containing multiple types of altered rocks, meanwhile, a targeted investigation and test scheme is provided, and an important basis is provided for design of rock mass slopes, caverns and the like.

The invention provides a surface wave information-based near-surface formation longitudinal wave velocity inversion method. The surface wave information-based near-surface formation longitudinal wave velocity inversion method comprises the following steps of: 1, extracting surface wave frequency dispersion data through a phase shift method; 2, according to the frequency dispersion curve, direct inversion is carried out to obtain the near-surface shear wave speed and thickness; step 3, calculating a W-D curve and a W / D-D curve; and 4, adding the W-D data and the W / D-D data into an objective function, and carrying out longitudinal wave velocity direct inversion. According to the near-surface formation longitudinal wave velocity inversion method based on the surface wave information, direct inversion of the near-surface formation longitudinal wave velocity can be achieved, information such as the transverse wave velocity, the formation thickness, the longitudinal wave velocity and the Poisson's ratio is obtained in the inversion process, and powerful research basis and support are provided for application of the surface wave information in oil exploration and engineering exploration.

The invention discloses a ring main unit cable line fault positioning system and method based on traveling wave intelligent sensing, and relates to the technical field of ring main unit cable line fault positioning, and the method comprises the following steps: arranging a traveling wave sensor at a position corresponding to a cable connecting plug or a solid-sealed polar pole in a ring main unit; an initial correction stage is carried out, a known electrical event is triggered on a cable in actual operation, the propagation time of a traveling wave signal between the two ends is measured, and the wave velocity of the traveling wave is actually measured on site and dynamically updated in combination with the known cable length; the method comprises the following steps: executing initial correction under different operation conditions, collecting corresponding data of working conditions and wave velocities, constructing a self-adaptive model of the wave velocities and working condition parameters, and when a fault occurs, dynamically predicting the wave velocities based on the constructed model according to current working condition parameters monitored in real time; and on the basis of the identified wave head timestamp, constructing an overdetermined equation set and solving an optimal fault position, so that the cable line fault positioning of the ring main unit is realized.

The invention discloses an acoustic black hole structure and a vibration damping device.The acoustic black hole structure comprises an acoustic black hole body and a damping layer, the acoustic black hole body is provided with a uniform thickness area and an acoustic black hole area, the acoustic black hole area is provided with a plurality of grooves, the grooves are distributed from the first end to the second end of the acoustic black hole area, and the damping layer is arranged between the first end and the second end of the acoustic black hole area. The depths of the grooves are gradually increased in the direction from the first end to the second end, and the damping layer is arranged in the acoustic black hole area. By machining the groove in the acoustic black hole area, the local bending rigidity of the acoustic black hole body is changed, the bending wave speed of the acoustic black hole body is reduced, the acoustic black hole effect is achieved, due to the arrangement of the groove, the local resonance effect can be utilized, and then structural vibration suppression in the low-frequency range is achieved; the problem that a traditional acoustic black hole structure is poor in low-frequency-band vibration reduction effect is solved, in addition, thickness cutting of an acoustic black hole area of an original structure is avoided, and the manufacturing difficulty and the requirement for the precision of machining equipment are lowered.

The invention discloses a real-time rendering method and system for physical simulation water surface waves, and the method comprises the following steps: constructing a generative adversarial network, obtaining a wave vector and an environment parameter variable of the waves, inputting the environment parameter variable into the pre-constructed generative adversarial network, and calculating the height of the waves through a Tessendorf method; calculating wave displacement through Fourier transform and inverse transform in a frequency domain based on the wave vector; calculating the velocity complex amplitude of the corresponding wave based on the wave vector, introducing a micro-scale vortex velocity field based on a particle system, and calculating the wave velocity based on the velocity complex amplitude and the micro-scale vortex field; and based on the wave height, the wave displacement and the wave speed, performing water surface wave rendering by adopting multi-cascade dynamic. According to the method, the physical rationality and visual authenticity of water surface wave simulation are improved, and water body physical simulation is promoted to develop from visual driving to the fusion direction of physical driving and data driving.

The present invention relates to a method for estimating the severity of vibration, which is the product of vibration frequency f by antinode amplitude of vibration A, and for estimating fatigue lifetime or damage of a suspended electrical cable span of overhead power lines, said suspended electrical cable span having a sag possibly negligible with respect to span length, and a mean local tension H, and a local oscillating motion amplitude u(x, t) with a local space derivative of motion (I), and being subject to a variation of said tension H, motion amplitude u(x, t) and said space derivative over time (I) due to vibration, wherein said estimation of the severity of vibration Af is obtained from the measurements of said amplitude motion u(x, t) and said space derivative of the motion amplitude (I) according to the formula (II), where ω, (III), H, m, (I) and (IV), are respectively the pulsation of the oscillating motion, the wave speed, the mean local tension of the suspended cable span, the mass per unit length of the suspended cable span, the space derivative of said motion amplitude, and the acceleration of said motion amplitude; and wherein said fatigue lifetime or damage are obtained from a number of cycles estimated from said tension frequency analysis and a stress level is obtained from said motion amplitude and said space derivative of the motion amplitude.

A method, apparatus, and non-transitory, computer readable medium are disclosed herein for optimizing a pressure pulse signal during ramp down operations for a hydraulic fracturing process in a wellbore. In one embodiment, a method comprises: obtaining pressure pulse data from a wellbore; calculating wave speed for the wellbore; and determining a rate change schedule for use during a ramp down procedure based on the wave speed.

The invention relates to the technical field of electronics, and discloses a reservoir area wading dangerous rock mass monitoring and early warning system, method, device and equipment and a medium, and the system comprises a rock mass soft zone positioning module, a rock mass damage sensing module and a monitoring and early warning module; the rock mass damage sensing module comprises a plurality of wave velocity monitoring sensors, the plurality of wave velocity monitoring sensors are arranged in a soft zone area of a target rock mass according to a preset requirement, each wave velocity monitoring sensor is used for collecting wave velocity data of a target position, and the soft zone area is determined by using the rock mass soft zone positioning module; the monitoring and early warning module is connected with the rock mass damage sensing module and used for determining rock mass damage information of target positions where the corresponding wave speed monitoring sensors are located based on the wave speed data collected by the wave speed monitoring sensors and determining early warning information of target rock mass based on the rock mass damage information of the target positions. The scientificity and effectiveness of monitoring and early warning of the wading dangerous rock mass in the reservoir area are effectively improved.

The invention relates to the technical field of high-rise building disassembly, in particular to an intelligent disassembly system for a high-rise building, which comprises a temporary support frame, a data acquisition module and a disassembly control module, the disassembly control module comprises a plurality of disassembly areas divided according to a preset size, and the distribution uniformity of wall concrete aggregate is determined according to the speed difference of wave speed; the area division unit is used for adjusting the preset size according to the volume ratio of angular aggregate in the disassembly area, the area optimization unit is used for re-dividing the remaining disassembly area of the remaining wall body according to the exposed bar length, and the disassembly sequence is determined according to the stirrup density ascending sequence corresponding to the multiple disassembly areas. The sequence determining unit is used for optimizing the dismounting sequence according to the deformation form of the steel bar joints, and the supporting control unit is used for determining the depth adjusting coefficient according to the crack expansion rate of the wall surface and optimizing the depth adjusting coefficient based on the deformation angle of the supporting rod. The dismounting safety of the wall body of the high-rise building is improved.

The invention relates to a defect detection method based on fast and slow wave chasing, and the method comprises the following steps: 1, calculating a guided wave frequency dispersion curve of a one-dimensional component, and determining the propagation speeds of guided waves under different frequencies, 2, selecting two excitation frequencies, respectively corresponding to different propagation speeds, recording a fast wave with a fast propagation speed as a fast wave, recording a wave speed as V1, recording a slow wave with a slow propagation speed as a slow wave, 3, when the fast waves reach the meeting point, if the point has defects, the defects are fully expanded under the stretching action of the slow waves, so that the reflection of the fast waves is improved, 4, the excitation time interval of the fast waves and the slow waves is delta t, and 5, the emission time interval is continuously changed, so that the fast waves and the slow waves meet at different positions d, and the reflection of the fast waves and the slow waves is improved. And step 6, extracting the intensity of the fast wave echo signals at different d positions as a (x), obtaining a corresponding relation curve of the echo intensity and the length of the component, and if the curve is obviously increased at a certain position, determining that the position has defects.

The invention provides a method and a device for determining detonation wave characteristics in a detonation tube, electronic equipment and a medium, and relates to the field of detonation wave characteristic research, and core flow field characteristics can be completely captured by accurately acquiring a detonation tube space propagation area and multi-layer real grid data and combining with a flow field control equation solution under an inertial reference system. The initial speed of the reference system is dynamically updated based on the wave speed of the detonation wave, it is ensured that the key area of the detonation wave is always located in the computational domain, and data distortion caused by core flow field deviation is avoided. Multiple times of iteration solving are carried out to obtain multiple detonation wave velocities, so that single calculation errors and wave surface fluctuation interference are effectively reduced, and the data reliability is improved. The propagation stability, the development stage and the energy characteristics can be comprehensively analyzed based on multiple groups of detonation wave velocities, the limitation of single data is broken through, accurate data support is provided for detonation wave mechanism research and structure optimization, and the scientificity of characteristic analysis is enhanced.

The invention provides a concrete structure integrity evaluation method and device based on wave velocity image diagnosis, and is applied to the technical field of geophysical exploration, and the method comprises the steps: obtaining a vibration signal, monitored by a vibration sensor in real time, of a concrete structure; when the vibration signal exceeds a preset vibration threshold value, determining the vibration signal as a target vibration signal; identifying the target vibration signal, and when the target vibration signal is an internal micro-seismic signal of the concrete structure, determining the arrival time of a first arrival wave of the target vibration signal; on the basis of a speed model generated by preorder iteration, arrival time inversion positioning is carried out on arrival time of the first arrival waves, and focus coordinates of the target vibration signals are obtained; constructing a dynamic speed model based on the arrival time of the first arrival wave and the focus coordinates; and performing real-time evaluation and damage trend analysis on the interior of the concrete structure based on the dynamic speed model. According to the invention, high-precision real-time monitoring of the wave velocity distribution of the concrete structure can be realized.

The invention discloses a fault point positioning method, device and equipment based on traveling wave signal wave velocity correction. Relates to the technical field of fault detection, and the method comprises the steps: employing a predetermined traveling wave distance measurement device to collect the propagation speed of a fault traveling wave in a target transmission line when an external line has a fault, and the target transmission line is an overhead line or a cable line; correcting the propagation velocity based on a pre-constructed wave velocity-frequency relation curve corresponding to the target transmission line to obtain a corrected wave velocity; performing calculation processing based on the correction wave velocity and the predetermined length of each segmented interval to obtain a target fault interval; and adopting a preset fault section endpoint positioning mode to carry out fault positioning on the target fault section to obtain a target fault point position. According to the method, the accuracy of fault point positioning can be improved.