Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
51 results about "Elastic wave velocity" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Systems and methods to determine elastic properties of materials
InactiveUS7107159B2Elastic propertyInherent ambiguityVibration measurement in solidsAnalysing solids using sonic/ultrasonic/infrasonic wavesTime domainHarmonic
The present invention provides systems and methods to used a measured driving-point response of a nonlinear material to determined one or more elastic properties of the material. The present invention takes advantage of the full information represented by the transient component, the steady-state component, the anharmonic components, and the nonlinear response components of a measured driving-point response of a real nonlinear material, without limitation in the use of large-amplitude forces. The elastic properties are determined by forming and solving a time-domain system of linear equations representing a differential equation model of the driving-point motions of the material. Based on a single, short duration, large-amplitude driving point measurement, both linear and nonlinear properties can be determined; both large-amplitude and near-zero amplitude properties can be determined; and elastic-wave speed and elastic moduli and their variation with depth can be determined.
Owner:GERMAN PETER THOMAS
Tunnel excavation surrounding rock dynamic refined classification method based on integrated parameters
The invention discloses a tunnel excavation surrounding rock dynamic refined classification method based on integrated parameters. The method comprises the following steps of: analyzing tunnel prospective design data, preliminarily judging classification of tunnel surrounding rocks, performing integrated parameter advance geological forecasting exploration on excavation tunnel face surrounding rocks, and correcting classification of a tunnel face and front surrounding rocks according to a forecasting result; performing geological recording observation on tunnel face excavation surrounding rocks, performing elastic wave velocity testing, and further correcting classification of the surrounding rocks of the tunnel face according to observation data and elastic wave velocity testing data; and performing monitoring measurement according to each construction step, and correcting the obtained classification of the surrounding rocks of the tunnel face according to monitoring measurement data to finish a cycle of surrounding rock refined classification. The method has the advantages that on the basis of analyzing the prospective design data and determining classification of the surrounding rocks, tunnel surrounding rocks in a construction stage are subjected to dynamic integrated refined classification by integrated operation of integrated parameter advance geological forecasting, tunnel face surrounding rock integrated exploration and field monitoring data analysis, so the classification of the surrounding rocks is refined and accurate.
Owner:BEIJING MUNICIPAL ENG RES INST
Borehole apparatus and methods for simultaneous multimode excitation and reception to determine elastic wave velocities, elastic modulii, degree of anisotropy and elastic symmetry configurations
InactiveUS20070183259A1Performance acceptability is not compromisedSeismology for water-loggingResponse sensitivityWell logging
An acoustic borehole logging system for generation and detection of multipole modes used to determine elastic properties of earth formations characterized as inhomogeneous anisotropic solids. The system concurrently generates and senses monopole, dipole, quadrupole and any higher order pole in the borehole / formation system in order to characterize the elastic properties and stress state of material penetrated by the borehole. Multipole modes of all orders are induced simultaneously without the need for separate transmitter and receiver systems. Performance of the logging system is not compromised due to eccentering of the axis of the tool in the borehole, tool tilt with respect to the axis of the borehole, or mismatch of response sensitivity of multiple receivers within the tool. The system comprises apparatus for generating and sensing acoustic signals in a borehole in an earth formation, and further comprises a processing method by which the sensor response signals are processed and analyzed to obtain desired formation parameters of interest.
Owner:WEATHERFORD CANADA
Elastic migration seismic wave field construction method and elastic migration seismic wave field construction device
ActiveCN103149585AFew grid pointsImprove build precisionSeismic signal processingReverse timeSource function
The invention provides an elastic migration seismic wave field construction method and an elastic migration seismic wave field construction device. The method includes computing a finite difference coefficient of extended compact staggered grids according to an elastic wave velocity stress equation; computing a finite difference operator matrix of the extended compact staggered grids; constructing forward direction extrapolation operator of a seismic source wave field, and a reverse-time extrapolation operator of a detection wave field; achieving forward direction extrapolation of a seismic wave field to obtain the seismic source wave field according to the forward direction extrapolation operator of the seismic source wave field, a preset medium model and a preset seismic source function; and achieving reverse-time extrapolation of the seismic wave field to obtain the detection wave field according to the reverse-time extrapolation operator of the detection wave field, a preset medium model and preset multi-component seismic data. Compared with an existing method for constructing an elastic deflection seismic wave field by utilization of a conventional finite difference method and a compact difference method, the number of difference base frame grid points is reduced under the condition of same difference orders, the construction precision of a complex medium wave field can be effectively improved, and therefore the imaging precision of reverse-time migration is improved.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Nondestructive testing method for bearing capacity of concrete bridge based on elastic modulus
ActiveCN103196741AImprove test accuracyMonitor Aging ConditionsStrength propertiesStress levelElastic wave velocity
The invention relates to a nondestructive testing method for the bearing capacity of a concrete bridge based on elastic modulus, and belongs to the technical field of engineering testing. The nondestructive testing method comprises the steps of: dividing a stress area into a compression area, a tensioning area, a shearing area and a neutral area without stress according to the type of the concrete bridge; carrying out impact elastic wave velocity testing on all the areas, knocking an excitation block and changing an excitation direction, so as to obtain first waves of an excitation elastic wave, namely a compression wave and a tensile wave, and deducing whether cracks exist in a testing area or not according to the velocity difference of the two waves; calculating the concrete tangent elastic modulus Ed; measuring the concrete elastic modulus Ec, and deducing the compressive strength of concrete; deducing the stress level and the stress state of the corresponding area according to the concrete tangent elastic modulus and the compressive strength of the concrete in all the areas; and deducing the bearing capacity of the bridge according to the stress level and the stress state of all the areas. By implementing the nondestructive testing method, safety guarantee data can be provided for the health evaluation of the bridge.
Owner:四川升拓检测技术股份有限公司
Method for acquiring stratum rock brittleness property through radial change of borehole elastic wave velocity
ActiveCN104407381AIncrease productionImprove fracturing effectSeismic signal processingSeismology for water-loggingFull waveWell logging
The invention discloses a method for acquiring stratum rock brittleness property through radial change of the borehole elastic wave velocity. The method comprises following steps: performing well logging in a depth interval to obtain full wave data when monopoles and dipoles in the depth interval are triggered as well as a stratum density curve respectively; obtaining the longitudinal wave velocity vp and the transverse wave velocity vs of the stratum; calculating travel time of waves of N receivers according to the longitudinal wave velocity; extracting a longitudinal wave arrival time curve changing with the depth, and defining the longitudinal wave arrival time curve as an actually measured longitudinal wave travel time curve; obtaining a radial profile of the longitudinal wave velocity of the stratum; minimizing an objective function to obtain change of a radial velocity of the transverse wave; obtaining a radial profile of the stratum transverse wave velocity continuously changing in the depth interval; and obtaining a brittle fracture index of the stratum through integral of the velocity and the radial distance according to obtained radial change of the longitudinal wave velocity and the transverse wave velocity of the borehole wall rock, and indicating brittleness and cleavability of the rock by comparing the index change. With the adoption of the method, the technical problems about effective evaluation of current situation of rock cleavability and the like can be solved.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Indirect coupling conic fiber grating ultrasonic sensor
InactiveCN105424163AImprove response characteristicsImprove stabilitySubsonic/sonic/ultrasonic wave measurementUsing wave/particle radiation meansFiberUltrasonic sensor
The invention relates to an indirect coupling conic fiber grating ultrasonic sensor. According to the indirect coupling conic fiber grating ultrasonic sensor, an upper end of a casing is provided with a sealing cover for processing a center hole, a sealing cover noise abatement pad is arranged between the sealing cover and the casing, a lower end of the casing is provided with a sound coupling cone, a sound coupling noise abatement pad is arranged between the sound coupling cone and the lower end of the casing, the top portion of the sound coupling cone is provided with a light guide fiber mounting hole through processing, one end of a light guide fiber is arranged in the light guide fiber mounting hole, the other end of the light guide fiber penetrates through the center hole of the sealing cover, the light guide fiber is provided with a grating, grating zone length of the grating is 1-10mm, and wavelength is 1540-1560nm. Based on tests, the sensor has excellent response performance, stability and sensitivity for 300KHz wave band ultrasonic signals, under the real-time acquisition mode, the spectrum signal to noise ratio is high, the ultrasonic signals reflected on upper and lower surfaces of organic glass can be intelligibly identified, the ultrasonic signals are suitable for dynamic scanning acquisition in an earthquake physics model, ultrasonic multi-layer imaging can be realized, and the sensor can be applied to the nondestructive structure test, oil and gas field physics model imaging, elastic wave speed modeling and biologic and medical technology fields.
Owner:NORTHWEST UNIV(CN)
Borehole apparatus and methods for simultaneous multimode excitation and reception to determine elastic wave velocities, elastic modulii, degree of anisotropy and elastic symmetry configurations
An acoustic borehole logging system for generation and detection of multipole modes used to determine elastic properties of earth formations characterized as inhomogeneous anisotropic solids. The system concurrently generates and senses monopole, dipole, quadrupole and any higher order pole in the borehole / formation system in order to characterize the elastic properties and stress state of material penetrated by the borehole. Multipole modes of all orders are induced simultaneously without the need for separate transmitter and receiver systems. Performance of the logging system is not compromised due to eccentering of the axis of the tool in the borehole, tool tilt with respect to the axis of the borehole, or mismatch of response sensitivity of multiple receivers within the tool. The system comprises apparatus for generating and sensing acoustic signals in a borehole in an earth formation, and further comprises a processing method by which the sensor response signals are processed and analyzed to obtain desired formation parameters of interest.
Owner:WEATHERFORD CANADA
Nondestructive quantitative testing method for working face three-dimensional mining stress field
ActiveCN110174463ARealize quantitative monitoringAnalysing solids using sonic/ultrasonic/infrasonic wavesSeismology for water-loggingData processing systemCt technology
The invention discloses a nondestructive quantitative testing method for a working face three-dimensional mining stress field; the three-direction mining stress field finally obtained in front of theworking face is obtained by adopting an elastic wave three-dimensional CT technology and a mining stress field data processing system; an initial ground stress test point is arranged in an elastic wave three-dimensional CT test area in front of the working face; the corresponding relation between an elastic wave velocity change gradient and a stress change gradient obtained by adopting a true triaxial loading test and an elastic wave velocity test is fully combined, so that the nondestructive and quantitative testing of the three-dimensional mining stress field in front of the working face isrealized. By adoption of the nondestructive quantitative testing method for the working face three-dimensional mining stress field, the three-direction mining stress field in a coal rock in front of the working face can be quantitatively monitored, and the monitoring result is a continuous mining stress field value; according to the test method, a deep drilling hole to the coal layer of the working face is not needed, so that nondestructive and quantitative monitoring is realized; and the problems that a traditional drilling stress meter testing method can only carry out partial single-direction mining stress qualitative testing, the testing result dispersion degree is high, the reliability is poor, and the like can be solved.
Owner:TIANDI SCI & TECH CO LTD +1
Method and device for layered simultaneous determination and long-term monitoring of foundation compactness
InactiveCN103015390AIncrease credibilityImprove efficiencyRoadwaysIn situ soil foundationHierarchical testClassical mechanics
The invention particularly discloses a method and a device for layered simultaneous determination and long-term monitoring of foundation compactness, provides the quantitative relationship between resistivity and compactness, as well as between elastic wave velocity and compactness, for the first time through research, and designs a resistivity and wave velocity integrated parallel sensor, a simultaneous determination transmitting and guiding device and a simultaneous determination permanent protection device for field compactness determination and long-term observation. The method can be used for simultaneously determining the resistivity and the elastic wave velocity of a foundation, solves the problems that a single test method is poor in adaptability and undesirable in result through mutual corroboration norm of two methods, realizes layered measurement of different positions of the foundation, as well as long-term monitoring of the foundation compactness in the service period, and solves the problem that a conventional method can realize neither layered compactness testing nor long-term compactness monitoring.
Owner:SHANDONG UNIV
Method for detecting elastic wave velocity of tunnel surrounding rock body
InactiveCN102435295APrecision levelAccurate depthSeismologyVelocity propogationClassical mechanicsElastic wave velocity
The invention discloses a method for detecting the elastic wave velocity of a tunnel surrounding rock body. The method comprises the following steps of: obtaining the elastic wave time distance curves of a first shot point, a second shot point, a third shot point and a fourth shot point via a detector; obtaining a first difference through calculating the time difference between the parallel sections of the elastic wave time distance curves of the first shot point and the third shot point, and obtaining a second difference through calculating the time difference between the parallel sections of the elastic wave time distance curves of the second shot point and the fourth shot point; calculating the interchange time according to the formula; and calculating the difference time according to the elastic wave time distance curves of the first shot point and the second shot point and the interchange time, generating a difference time distance curve and obtaining the elastic wave velocity according to the slope of the difference time distance curve. The method disclosed by the invention can accurately detect the elastic wave velocity of the surrounding rock body of a tunnel to be surveyed, accordingly, the classified surrounding rock ranks are more accurate, and further, the tunnel construction safety is improved, and the tunnel construction investment is saved.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Three-dimensional in-situ real-time submarine sediment acoustic section scanning device
ActiveCN111257413ARealize 3D scanning measurementGet featuresAnalysing solids using sonic/ultrasonic/infrasonic wavesLongitudinal waveControl cell
The invention discloses a three-dimensional in-situ real-time submarine sediment acoustic section scanning device, and belongs to the field of marine geological detection. The device comprises a supporting frame, the supporting frame is provided with an underwater acoustic communicator, a control unit, an acoustic signal transmitting and collecting unit and a penetration system, and the penetration system is provided with a plurality of acoustic feeler levers; each acoustic feeler lever is at least provided with a plurality of longitudinal wave transducers in the longitudinal direction or at least provided with a plurality of transverse wave transducers; one longitudinal wave transducer is used as a transmitting transducer, and the longitudinal wave transducers in other acoustic feeler levers are used as receiving transducers; or one of the transverse wave transducers is used as a transmitting transducer, and the transverse wave transducers in the other acoustic feeler levers are usedas receiving transducers; and each longitudinal wave transducer or each transverse wave transducer is in communication connection with the acoustic signal transmitting and collecting unit. The three-dimensional longitudinal wave and transverse wave characteristics of the seabed sediment can be obtained in real time; and the saturation of the natural gas hydrate in the sediment in a measurement area is obtained through the inversion of the relationship between the hydrate saturation and the elastic wave velocity.
Owner:OCEAN UNIV OF CHINA
Continuous and automatic measuring apparatus and method of surrounding rock wave velocity structure in tunneling process of TBM
PendingCN107085238ARealize continuous automatic measurement of sound wave velocitySeismic signal processingStructure analysisElastic wave velocity
The invention provides a continuous and automatic measuring apparatus and method of a surrounding elastic wave velocity structure in a tunneling process of a TBM. The method includes: a plurality of hydraulic telescoping rods are fixed on a TBM horizontal support; the hydraulic telescoping rods stretch out and enable detectors to be fixed to a surrounding rock wall through a certain pressure during construction step-changing of the TBM, and the position of each contact measuring point is recorded; when the pressure between the detectors and the surrounding rock wall reaches a predetermined value, a small hammer knocks the surrounding rock wall, the detectors receive surface wave signals transmitted through surrounding rocks, and a data continuous recording system realizes continuous and automatic record of surface waves; the hydraulic telescoping rods are contracted to the horizontal support after one time of measurement and move forwardly for a certain distance with the horizontal support, the distance is less than or equal to the length of one group of detectors, and the above process is repeated during step change of the TBM once again; and waveform processing and dispersion analysis of the acquired surface waves are performed, and the elastic wave velocity structure in a medium is finally speculated through an underground structure analysis.
Owner:WUHAN UNIV
Imaging system and imaging method for well earthquake using hammer head of down-hole hammer as focus
InactiveCN103630938AImprove accuracyLarge coverage areaSeismic energy generationSeismology for water-loggingHigh energyImage resolution
The invention discloses an imaging system and an imaging method for a well earthquake using a hammer head of a down-hole hammer as a focus, and belongs to the technical field of engineering seismic exploration. A low-energy focus such as an electric spark is replaced by high-energy excitation of the hammer head of the down-hole hammer, and distant earthquake signals can be received; in the imaging method for the well earthquake, the accuracy on reflection of an object is increased along with reduction of the distance between the focus and the object, the down-hole hammer drills the ground downwards gradually, and the distance between the hammer head and the object is shorter than the distance between the ground and the object, so that the resolution ratio of the earthquake method of exciting the focus in a hole is high; and more importantly, along with drilling of the down-hole hammer, the velocity distribution condition of elastic waves of media surrounding a drilling hole is obtained, a detector can be optionally arranged according to conditions of the ground, the coverage area surrounding the drilling hole is large, a three-dimensional image can be formed, and visual expression can be realized.
Owner:CHINA RAILWAY DESIGN GRP CO LTD
Gridded high-speed railway supporting layer concrete wave velocity detection device and estimation method
PendingCN109738525AImprove the level of maintenance and repairAvoid destructionAnalysing solids using sonic/ultrasonic/infrasonic wavesEstimation methodsClassical mechanics
The invention discloses a gridded high-speed railway supporting layer concrete wave velocity detection device and estimation method, and relates to the technical field of nondestructive detection of concrete quality of ballastless tracks of high-speed railway. Firstly, the supporting layer elastic wave velocity detection device is provided; an elastic wave velocity estimation model is built by thegridded estimation method; and based on a loss function under a fine-scale condition and a neural network model of an optimization objective, fine nondestructive detection of the wave velocity in theballastless tracks of the high-speed railway is realized. The problem of fine-scale detection of the concrete strength of the supporting layers of the ballastless tracks of the high-speed railway issolved; the destruction of traditional drill core sampling to the structure is overcome; the detection scale is refined; the detection precision of concrete wave velocity estimation is improved; and the detection device has the characteristics of simple operation, non-destructiveness and high detection precision, is suitable for detection of the concrete wave velocity of the supporting layers, meets the requirement for large-area detection of the internal strength of the supporting layers, and is favorable for improving the maintenance level of the ballastless tracks of the high-speed railwayin China.
Owner:SHIJIAZHUANG TIEDAO UNIV
Borehole apparatus and methods for simultaneous multimode excitation and reception to determine elastic wave velocities, elastic modulii, degree of anisotropy and elastic symmetry configurations
An acoustic borehole logging system for generation and detection of multipole modes used to determine elastic properties of earth formations characterized as inhomogeneous anisotropic solids. The system concurrently generates and senses monopole, dipole, quadrupole and any higher order pole in the borehole / formation system in order to characterize the elastic properties and stress state of material penetrated by the borehole. Multipole modes of all orders are induced simultaneously without the need for separate transmitter and receiver systems. Performance of the logging system is not compromised due to eccentering of the axis of the tool in the borehole, tool tilt with respect to the axis of the borehole, or mismatch of response sensitivity of multiple receivers within the tool. The system comprises apparatus for generating and sensing acoustic signals in a borehole in an earth formation, and further comprises a processing method by which the sensor response signals are processed and analyzed to obtain desired formation parameters of interest.
Owner:WEATHERFORD CANADA
Rainfall landslide early warning system based on elastic wave velocity
The invention belongs to the technical field of natural disaster prevention and control, and discloses a rainfall landslide early warning system based on elastic wave velocity. The system is providedwith a frame. A pressure chamber is fixedly mounted in the frame. A permeable stone is fixedly mounted on the top of the pressure chamber. A clay plate is fixedly mounted on the bottom of the pressurechamber. Bending elements are symmetrically mounted on the lower surface of the permeable stone and the upper surface of the clay plate. A pressure sensor, an oscilloscope and a signal amplifier areembedded in the bending elements. The elastic wave velocity decreases slowly with the increase of the water content and decreases sharply with the increase of the deformation, and the wave velocity decreases sharply in case of approaching instability. The possible mechanism of the decrease of the elastic wave velocity caused by water content and deformation is explained according to the experimental results, and it is proposed that the landslide early warning is given when the wave velocity decreases abruptly. A new method and a reliable basis can be provided for landslide disaster preventionand reduction and prediction and forecast.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
Method and system for detecting elastic wave velocity of rock component
InactiveCN102645267ADetect elastic wave velocityGood compression propertiesAnalysing solids using sonic/ultrasonic/infrasonic wavesVelocity propogationButt jointTransducer
The invention relates to a method and a system for detecting the elastic wave velocity of a rock component. The method includes the steps: coupling a transmitting transducer with a receiving transducer by the aid of the rock component; exciting the transmitting transducer by the aid of linear frequency modulation encoding signals; receiving detection signals Srock by the aid of the receiving transducer; performing related functional operation for matched filtering signals Smatch and the detection signals Srock in a real number field to obtain pulse compression signals Scompress (n) with a single peak value; and calculating the arrival time of head waves of elastic waves according to the peak time delta t of the pulse compression signals Scompress (n). The receiving transducer receives the matched filtering signals Smatch when the transmitting transducer is directly in butt joint with the receiving transducer. The problem that head waves of elastic waves are difficult to distinguish when background noise is high in the prior art is solved, the elastic wave velocity of rocks can be precisely detected, and the head waves of the elastic waves can also be detected for the component in a long distance.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI
Method for determining integral inclination of historic building structure under the effect of industrial vibration
The invention relates to the field of historic building structure protection, and particularly relates to a method for determining integral inclination of a historic building structure under the effect of industrial vibration. The method comprises steps of measuring on site the horizontal velocity response V[0] of the highest point of the historic building structure and the horizontal velocity response V[01] of the highest point of the bearing structure; selecting the equivalent shearing elastic wave velocity V[S] according to the type of the historic building; measuring on site the shearing elastic wave velocity V[S1] of the bearing structure; calculating the integral horizontal dynamic strain [epsilon][S] of the historic building structure according to horizontal velocity response V[0] of the highest point of the historic building structure and the equivalent shearing elastic wave velocity V[S]; and calculating the horizontal dynamic strain [epsilon][S1] of the bearing structure of the historic building according to horizontal velocity response V[01] of the highest point of the bearing structure and the shearing elastic wave velocity V[S1] of the bearing structure.
Owner:潘复兰
Unsaturated coarse-grained soil soil-water characteristic curve combined bending element measuring device
PendingCN111811962ADifferent initial stress statesPrecise control of substrate suctionMaterial strength using tensile/compressive forcesMaterial strength using steady shearing forcesAxial displacementShear modulus
The invention discloses an unsaturated coarse-grained soil soil-water characteristic curve combined bending element measuring device, which can be used for combined measurement of an unsaturated coarse-grained soil soil-water characteristic curve and a maximum shear (elastic) modulus in geotechnical engineering, and can further be used for researching the maximum shear (elastic) modulus of unsaturated coarse-grained soil under different initial stresses and matrix suction forces. The unsaturated coarse-grained soil soil-water characteristic curve combined bending element measuring device comprises a pressure chamber, an axial displacement sensor, an axial pressure control system, a confining pressure control system, an air pressure control system, a water pressure control system, a high-air-inlet-value argil plate, an argil plate saturation accessory and a piezoelectric ceramic bending element embedded in the midpoint position of a top cap and the argil plate. According to the unsaturated coarse-grained soil soil-water characteristic curve combined bending element measuring device, different (isotropic and anisotropic) initial stress states can be realized by applying axial pressure and confining pressure through utilizing air pressure; the matrix suction in a sample can accurately controlled by means of the high-air-inlet-value argil plate, the air pressure control system andthe water pressure control system, so that the measurement of a soil-water characteristic curve is realized; and the shear wave velocity or the elastic wave velocity is measured through using the piezoelectric ceramic bending element, so that the measurement of the maximum shear modulus or the elastic modulus of the unsaturated coarse-grained soil in a controllable matrix suction state is realized.
Owner:WENZHOU UNIVERSITY
Irregular shale sample and preparation method thereof as well as ultrasonic testing device
InactiveCN104374623AGet goodEasy to testAnalysing solids using sonic/ultrasonic/infrasonic wavesPreparing sample for investigationEpoxyWave form
The invention provides an irregular shale sample and a preparation method thereof as well as an ultrasonic testing device. The preparation method comprises the steps of mixing epoxy resin and a curing agent according to a certain proportion and evenly stirring for later use; adding a plurality of irregular shale samples into a cylindrical container, pouring the prepared resin solution into the container, and forming a round cake-shaped sample after the resin solution is solidified; smoothing the two ends of the round cake-shaped sample by polishing so that the two end surfaces of each irregular shale sample are exposed; respectively fixing two needle type probes at the exposed two ends of each irregular shale sample by a special clamp holder; using a sound wave pulse method to obtain the ultrasonic wave forms in cores of the shale samples; adopting an autocorrelation method to obtain high-precision elastic wave velocity. The needle type probes and the autocorrelation method are adopted by the method, so that the monitoring accuracy of the elastic wave velocity is greatly improved, the elastic property of the shale can be rapidly obtained, and the problem that regular shale samples are not enough can be solved; furthermore, the method is simple to operate and suitable for evaluating the elastic property of the underground cores in real time in the oil field.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Detection method of grouting compactness for assembly-type shear wall pipeline
InactiveCN106645407AEasy to fixImprove detection efficiencyAnalysing solids using sonic/ultrasonic/infrasonic wavesProcessing detected response signalFrequency spectrumData acquisition
The invention relates to a detection method of grouting compactness for an assembly-type shear wall pipeline, and belongs to the technical field of the quality inspection of building engineering. The method comprises the following steps: step I, wearing a combined detection apparatus; step II, detecting an impact echo; and step III, measuring the compactness. According to the detection method, elastic wave data is acquired by virtue of a sensor, an equivalent wave velocity is calculated by adopting computing software, and spectral analysis is performed on the obtained equivalent elastic wave velocity of other test points according to the calculated equivalent wave velocity and converted to a color contour map which is convenient to intuitively judge. The detection method is high in field operability, simple in data acquisition, unapparent in response to the signal of metal materials such as steel reinforcing bars and the materials such as plastic pipelines and has clear signal response to the grouting compactness of the pipeline, the analysis can be performed according to the spectral data converted from the equivalent wave velocity, the data signal can be converted to the color contour map for convenience in intuitive display, and the beneficial effect is remarkable.
Owner:ANHUI BUILDING ENG QUALITY SUPERVISION & TESTING STATION
High-pressure medium seismic wave propagation simulation method
ActiveCN109100801AEasy to identifyReal earthquake recordSeismic signal processingAttenuation coefficientScattering attenuation
The invention relates to a high-pressure medium seismic wave propagation simulation method, comprising the following steps: 1) establishing a novel acoustic elasticity formula combined with pore structural parameters; 2) calculating equivalent elastic moduli and elastic wave velocities in different pressure states by utilizing the novel acoustic elasticity formula; 3) extracting structured data, namely autocorrelation length, among particles inside rocks; 4) specific to each pressure state, taking the equivalent elastic moduli obtained by the step 2) as background values of rock medium elasticmoduli respectively, and according the autocorrelation length extracted in the step 3), by combining an autocorrelation function, adding elastic modulus disturbance in the background values, and building a rock numerical value model in each pressure state; and 5) performing finite element seismic wave field simulation in each rock numerical value model, and extracting a scattering attenuation Qc-1 value of a reservoir specific to characteristics of a deep reservoir, wherein Qc-1 is a coda wave attenuation coefficient.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Elastic wave velocity test probe in dry hole and test method
PendingCN112362155AImprove efficiencyGood precisionMaterial analysis using sonic/ultrasonic/infrasonic wavesVelocity propogationEngineeringElastic wave velocity
Owner:禹班工程科技(上海)有限公司
Method and device for constructing elastic migration seismic wave field
ActiveCN103149585BFew grid pointsImprove build precisionSeismic signal processingReverse timeWave field
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Fracture-containing reservoir rock physical modeling method according to fracture space distribution
ActiveCN111273341ACharacterization speedCharacterizing the effects of seismic anisotropySeismic signal processingSeismic anisotropyClassical mechanics
The invention provides a fracture-containing reservoir rock physical modeling method according to fracture spatial distribution, which comprises the following steps: step 10, acquiring parameters representing fracture spatial distribution, and establishing a fracture geological model according to the parameters representing fracture spatial distribution; step 20, acquiring an elastic stiffness coefficient of the fractured reservoir dry rock according to the fracture geological model; step 30, according to the elastic stiffness coefficient of the fractured reservoir dry rock, acquiring the elastic stiffness coefficient of the fractured reservoir saturated by different fluids; step 40, performing Bund conversion on the elastic stiffness coefficient of the fractured reservoir saturated by different fluids to obtain elastic properties and anisotropy of fractures in any direction; and step 50, establishing an elastic velocity and seismic anisotropy model of the fractured reservoir accordingto the elastic properties and anisotropy of the fractures in any direction. The method can effectively represent the influence of the coupling effect of different fracture densities and different fracture spatial distributions on the elastic wave velocity and the seismic anisotropy.
Owner:PETROCHINA CO LTD
A non-destructive test method for the bearing capacity of concrete bridges based on elastic modulus
The invention relates to a nondestructive testing method for the bearing capacity of a concrete bridge based on elastic modulus, and belongs to the technical field of engineering testing. The nondestructive testing method comprises the steps of: dividing a stress area into a compression area, a tensioning area, a shearing area and a neutral area without stress according to the type of the concrete bridge; carrying out impact elastic wave velocity testing on all the areas, knocking an excitation block and changing an excitation direction, so as to obtain first waves of an excitation elastic wave, namely a compression wave and a tensile wave, and deducing whether cracks exist in a testing area or not according to the velocity difference of the two waves; calculating the concrete tangent elastic modulus Ed; measuring the concrete elastic modulus Ec, and deducing the compressive strength of concrete; deducing the stress level and the stress state of the corresponding area according to the concrete tangent elastic modulus and the compressive strength of the concrete in all the areas; and deducing the bearing capacity of the bridge according to the stress level and the stress state of all the areas. By implementing the nondestructive testing method, safety guarantee data can be provided for the health evaluation of the bridge.
Owner:四川升拓检测技术股份有限公司
Method, device and equipment for determining elastic wave velocity of natural gas hydrate
ActiveCN111221039BEfficient elastic wave velocityElastic wave speed is convenientSeismic signal processingThermodynamicsCrystal structure
The invention provides a method, device and equipment for determining the elastic wave velocity of a natural gas hydrate, and the method comprises the steps of obtaining a target temperature, a targetpressure, an elastic deformation interval and a first crystal structure of the natural gas hydrate; under the target temperature and the target pressure, balancing the first crystal structure to obtain a balanced second crystal structure and density; at the target temperature, applying axial strain and shear strain to the second crystal structure in the elastic deformation interval, and obtainingthe stress-strain relation of the second crystal structure; determining an elastic constant according to the stress-strain relationship; and according to the elastic constant and the density of the second crystal structure, calculating the wave velocity of the elastic wave when the elastic wave is propagated in the second crystal structure. In the embodiment of the invention, the elastic wave velocity of the natural gas hydrate at the target temperature and the target pressure can be accurately, efficiently and conveniently calculated from the microcosmic scale, and powerful theoretical guidance is provided for exploration and development of the natural gas hydrate.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
A Method of Retrieving the Distribution Characteristics of Rock Pores Using the Theory of Pore and Fractured Media Elastic Waves
ActiveCN112505772BExtended Physical TheoryCharacterize the distribution of cracksSeismic signal processingPore distributionRock core
The invention discloses a method for inverting the distribution characteristics of rock pores by using the elastic wave theory of pores and fractured media. 2. Use the pore-crack theory of multi-form cracks to simulate the elastic wave velocity of the rock; Step 3. For cracks with multiple forms in the rock, the pore aspect ratio spectrum at different pressure points can be calculated from the pore aspect ratio spectrum at 0 effective pressure ; Step 4, establish the inversion objective function; Step 5, set the fractures of various aspect ratios, including pores; Step 6, repeatedly adjust the aspect ratio and fracture density of the various fractures of the rock under 0 effective stress, so that the objective function reaches The minimum value, the pore aspect ratio spectrum of the rock at each pressure point is obtained. The invention can solve the technical problems of obtaining rock pore structure characteristics more accurately, analyzing rock mechanics, acoustics and fluid seepage properties, and the like.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Organic-matter-rich mud shale rock physical model establishing method
InactiveCN103713320BImprove efficiencyHigh predictive speed accuracySeismic signal processingPorosityLongitudinal wave
The invention discloses an organic-matter-rich mud shale rock physical model establishing method. According to the method, pore shape influences are fully taken into consideration through the Wu (1966) two-dimensional pore surface ratio and / or four special Berryman (1980) three-dimensional pore shapes; critical porosity limitation influences are eliminated oriented to different pore types of critical porosity limitation through a differential effective medium theory, organic matter is used as solid inclusion compound of rock, solid substation is performed through a Brown-Korringa equation, and an organic-matter-rich mud shale rock physical model capable of predicting elastic wave speed is established. The organic-matter-rich mud shale rock physical model established with the method can approximate physical properties of the organic-matter-rich mud shale rock, and the longitudinal wave speed and the shear wave speed of a seismic wave in the organic-matter-rich mud shale rock can be accurately predicted. The efficiency for establishing the organic-matter-rich mud shale rock physical model is high.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com