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30results about How to "Imaging results are accurate" patented technology
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Imaging method and device based on orthogonal multiple frequency ultrasonic stable-state echo signal
InactiveCN101357068AHigh measurement accuracyImprove estimation accuracyUltrasonic/sonic/infrasonic diagnosticsInfrasonic diagnosticsVIT signalsMultiple frequency
The invention discloses an imaging method and a device on the basis of orthogonal multi-frequency ultrasonic steady echo signal. The method uses an orthogonal frequency division multiplexing modulation type to form multi-frequency continuous baseband signals which are orthogonal with each other; the multi-frequency continuous baseband signals are modulated as multi-frequency ultrasonic continuous emission signals and sent out by an ultrasonic probe; the ultrasonic probe detects the steady echo signals which are reflected back; the steady echo signals are equivalent to the superposing signals; the received multi-frequency continuous baseband signals after modulation are orthogonally decomposed, each path of receiving signals are decomposed by the characteristic that each path of signals are orthogonal with each other, the amplitude of each interface reflection echo and the position thereof corresponding to the incident interface are calculated so as to carry out the image forming. The device of the invention comprises an ultrasonic probe, a control unit, and an operation unit, a receiving / emitting unit, a processing unit and a display unit which are respectively connected with the control unit; the ultrasonic probe is connected with the receiving / emitting unit; the processing unit is respectively connected with the receiving / emitting unit and the display unit; the method and the device of the invention has precise image forming and good anti-interference performance, and reduces the cost by adopting a single probe.
Owner:SOUTH CHINA UNIV OF TECH
Acoustic-photo chromatography imaging method for multiple-element array electronic scanning biological tissue and apparatus thereof
InactiveCN1470218ARealize tomographyHigh speedUltrasonic/sonic/infrasonic diagnosticsInfrasonic diagnosticsGroup elementPhoto acoustic
The invention provides a multielement array electronic scan bio-organization photoacostic layer separating imaging method and the equipment, including the steps: the pulse laser comes into the bio-tissue to produce photoacoustic signal which is collected and stored by computer; use multielement array electronic scan detector receives the photoacoustic signal, synchronously, and at the same time the computer collects and stores the photoacoustic signal; repeat collection until all the group elements are collected once; after finishing collecting, the computer makes filtering and integral processing on the optical-voice signal, and then performs layer separating imaging on the bio-organization by backward projecting algorithm. The equipment includes the laser, the multielement array electronic scan detector, the high-speed collection card and the computer. The equipment's automation level is high, convenient to operate and simpler to control and use.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Waterborne fracturing stress measurement and induction fracture dynamic imaging integration device
ActiveCN107829725AImprove measurement efficiencyThe result is accurateConstructionsFluid removalPhysicsStress measurement
The invention provides a waterborne fracturing stress measurement and induction fracture dynamic imaging integration device, and belongs to the field of ground stress testing. The waterborne fracturing stress measurement and induction fracture dynamic imaging integration device comprises a fracturing packer, an ultrasonic wave imaging system and a push-pull valve, the ultrasonic wave imaging system is arranged on a flow dividing center rod of the fracturing packer, the ultrasonic wave imaging system and the fracturing packer can descend a well together, and real-time hole wall imaging is achieved, ground stress of a hole wall rock can be rapidly measured, hydraulic fracturing measurement and induction fracture imaging can be achieved only by descending the well once, ground stress measuring efficiency is greatly improved, the ultrasonic wave imaging system dynamically images in real time, and imaging results are more accurate and reliable.
Owner:INST OF GEOMECHANICS +1
Near infrared fluorescence-X-ray dual mode small animal imaging equipment
PendingCN106963341AImaging results are accurateImaging results are reliableDiagnostics using fluorescence emissionSensorsDual modeX-ray
The invention discloses a near infrared fluorescence-X-ray dual mode small animal imaging equipment. The imaging equipment is composed of an excitation source, an X-ray source, an X-ray fluorescence conversion screen, a light filter, a focusing objective lens, a fluorescence detector, an object stage and a computer, wherein the wavelength of the fluorescence detector ranges from 400 nanometer to 1700 nanometer, the excitation source, the fluorescence detector, the light filter combination and the transparent object stage can be controlled through the computer, and the computer can also shoot and output images and save them. According to the near infrared fluorescence-X-ray dual mode small animal imaging equipment, objects to be imaged can be subjected to near infrared fluorescence imaging and X-ray imaging to obtain the fluorescence images, and the advantages of the two imaging modes complement each other.
Owner:苏州影睿光学科技有限公司
Earthquake imaging method
InactiveCN108562937AReduce mistakesImaging results are accurateSeismic signal processingErrors and residualsComputer science
The present invention provides an earthquake imaging method, and relates to the technical field of exploration. The method comprises the steps of: based on actually measured earthquake data and a dielectric root-mean-square speed model, performing pre-stack time migration imaging to obtain an initial imaging result; performing pre-stack time demigration based on the initial imaging result and thedielectric root-mean-square speed model, and obtaining initial simulation earthquake data; employing a conjugate gradient algorithm to perform solution based on the initial imaging result and the initial simulation earthquake data to obtain an imaging result corresponding to the simulation earthquake data when the errors of the simulation earthquake data and the actually measured earthquake data is smaller than or equal to a preset error as a final earthquake imaging result. The earthquake imaging method can better eliminate the fuzzification influence of an Hessian operator on the imaging result when migration imaging so as to obtain an accurate imaging result.
Owner:NORTHEAST GASOLINEEUM UNIV
Longitudinal and transverse wave separation method without separation artifacts
ActiveCN111025386ANot changed phaseNot subject to change in amplitudeSeismic signal processingClassical mechanicsWave field
The invention relates to a longitudinal and transverse wave separation method without separation artifacts, and belongs to the technical field of seismic wave information processing. The invention mainly overcomes the defects in the prior art, and provides a longitudinal and transverse wave separation method without separation artifacts, which comprises the following specific steps: carrying out forward modeling by using a first-order speed-strain equation, and carrying out longitudinal and transverse wave decoupling based on the formula and a longitudinal and transverse wave decoupling equation to obtain a separated longitudinal and transverse wave speed field. According to the invention, the phase and the amplitude of the separation result are not changed, and the separation result has no separation artifact; accurate longitudinal and transverse wave separation provides support for forward modeling and understanding of seismic wave propagation, elastic waves are relatively complex due to the fact that the elastic waves include longitudinal and transverse waves, and coupling of the longitudinal and transverse waves causes inconvenience to understanding of propagation rules of a wave field during forward modeling of the wave field of the elastic waves. Accurate longitudinal and transverse wave separation provides support for elastic wave imaging, surface data longitudinal and transverse wave separation, microseism positioning and the like depending on elastic wave field continuation algorithms.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
Method for rapidly marking Cys-Annexin V through <18>F and application of method
ActiveCN105669855AGuaranteed location markerAvoid the problem of low imaging specificityRadioactive preparation carriersPeptide preparation methodsPet imagingComputing tomography
The invention belongs to the technical field of positron emission computed tomography (PET) imaging, and particularly relates to a method for rapidly marking Cys-Annexin V through <18>F and application of obtained <18>F-Al-NOTA-Cys-Annexin V in the aspect of detecting cell apoptosis. According to the method for rapidly marking Cys-Annexin V through <18>F, <18>F-Al-NOTA-Maleimide is adopted to mark Cys-Annexin V for the first time, the marking time used by the marking method is short, the marking rate is high, the fact of using <18>F for positioning and marking Cys-Annexin V is achieved, and <18>F-Al-NOTA-Cys-Annexin V maintains good affinity with PS, has a good imaging effect by serving as a PET imaging agent and has the more ideal imaging specificity.
Owner:JIANGSU INST OF NUCLEAR MEDICINE +1
Method for labeling Cys-Annexin V with <18>F and application of <18>F-FBEM-Cys-Annexin V
ActiveCN104193820AAvoid the problem of low imaging specificityNo change in affinityCell receptors/surface-antigens/surface-determinantsRadioactive preparation carriersPet imagingAnnexin
The invention relates to a method for marking Cys-Annexin V with <18>F. According to the method, <18>F-FBEM is adopted for labeling Cys-Annexin V, the labeling rate is high, positioning labeling of Cys-Annexin V with <18>F can be achieved, and the labeled <18>F-FBEM-Cys-Annexin V keeps good affinity with PS, realizes a good imaging effect when used as a PET imaging agent, and has ideal imaging specificity.
Owner:JIANGSU INST OF NUCLEAR MEDICINE +1
No-clean cell membrane targeting fluorescent probe and preparation method and application thereof
ActiveCN111533730AMild reaction conditionsPost-processing is simpleOrganic chemistryFluorescence/phosphorescenceBiology cellChemical compound
The invention discloses a no-clean cell membrane targeting fluorescent probe and a preparation method and application thereof. Cheap carbazole monoaldehyde derivatives and 4-methylpyridinium containing sulfonate radicals are used for reaction, the compound pyridinium salt derivative Car-py with a D-pi-A conjugated structure is prepared, the fluorescent probe can be accurately positioned on a cellmembrane of a biological cell, the compound Car-py can be used for a developing test without cleaning after acting with the cell, the operation is simple, and the microstructure and dynamic change ofthe biological cell can be visually observed in real time through fluorescence microimaging.
Owner:WANNAN MEDICAL COLLEGE
Passive source interference migration imaging method and system based on illumination direction constraint
ActiveCN113866821ALow costImaging results are accurateSeismic signal receiversRadiologyComputer vision
The invention discloses a passive source interference migration imaging method and system based on illumination direction constraint, and the method comprises the steps: carrying out the interference processing of a single-point pulse type passive source seismic record, and obtaining a deconvolution function of a passive source; carrying out inclined superposition processing on the deconvolution function to obtain an effective lighting information direction; and obtaining a migration imaging result based on the deconvolution function and the effective lighting information direction. The system comprises a deconvolution module, an illumination analysis module and an imaging module. The deconvolution module is used for performing interference processing on the seismic record of the single-point pulse type passive source to obtain a deconvolution function; the illumination analysis module is used for performing inclined superposition processing on the deconvolution function to obtain an effective lighting information direction; and the imaging module obtains a migration imaging result according to the deconvolution function and the effective lighting information direction. Under the condition that the traditional hypothesis is not met, effective information contained in the data can be extracted, and an accurate imaging result is obtained.
Owner:JILIN UNIV
Fidelity imaging method based on wave field extrapolation of scalar wave
ActiveCN108919352ADoes not destroy relative amplitudeAutomatically removes low wavenumber noiseSeismic signal processingWave detectionBoundary values
The invention relates to a fidelity imaging method based on wave field extrapolation of scalar wave. The method comprises the following steps: deriving a scalar wave equation describing the propagation law of a seismic wave field excited by an earthquake source in an underground medium according to the Newton's second law and the Hooke's law by assuming the underground medium as isotropy, uniformness and constant density; solving the scalar wave equation by using a finite difference method after knowing the underground smooth background speed and a seismic source sub-wave function, thereby obtaining the wave field amplitudes of the wave field at underground different space points at any time, and recording the wave field amplitude at a boundary when the wave field is propagated to the boundary of the numerical simulation; solving the scalar wave equation by regarding wave field amplitude at the boundary as a boundary value condition, thereby recovering the seismic source point end wavefield; solving the scalar wave equation by regarding the wave field received by a surface wave detector as the boundary value condition, thereby constructing a wave detection point end wave field; and performing the fidelity imaging on the seismic source point end wave field and the wave detection point end wave field through the fidelity imaging formula based on the wave field extrapolation of the scalar wave, thereby obtaining a fidelity imaging result of an underground reflection coefficient.
Owner:CHINA NAT OFFSHORE OIL CORP +1
A Method for Separation of P- and S-waves without Separation Artifacts
ActiveCN111025386BNo separation illusionAccurate P-S Wave SeparationSeismic signal processingInformation processingWave field
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
A sort of 18 Method for labeling cys‑annexin V and its application
ActiveCN104193820BNo change in affinityAffinity was not affectedCell receptors/surface-antigens/surface-determinantsRadioactive preparation carriersPet imagingAnnexin
The invention relates to a method for marking Cys-Annexin V with <18>F. According to the method, <18>F-FBEM is adopted for labeling Cys-Annexin V, the labeling rate is high, positioning labeling of Cys-Annexin V with <18>F can be achieved, and the labeled <18>F-FBEM-Cys-Annexin V keeps good affinity with PS, realizes a good imaging effect when used as a PET imaging agent, and has ideal imaging specificity.
Owner:JIANGSU INST OF NUCLEAR MEDICINE +1
Surgical imaging device
InactiveCN113116368AGuaranteed real-time monitoringUniform energyRadiation diagnostic image/data processingMechanical engineeringRay
The invention discloses a surgical imaging device which comprises an image sensor and a first supporting rod. An anti-scattering grating is mounted below the first supporting rod; the image sensor is arranged below the anti-scattering grating in the vertical direction; a support is arranged at the bottom of the image sensor; a supporting column is arranged in the center direction of the support; a lens rotating device is arranged on the right upper side of the supporting column; second supporting rods are arranged at the left-right symmetrical positions of the supporting column; and filters are arranged on the inner upper sides of the second supporting rods. According to the invention, the image sensor is used for sensing an image in real time when a patient is subjected to an operation, the image sensor is arranged below the anti-scattering grating in the vertical direction, the image sensor below the anti-scattering grating can feed back the image to a display mirror, and real-time monitoring can be guaranteed. According to the invention, the filters can absorb low-energy soft X-ray photons and balance the energy of the X-ray photons. The filters are opposite to a collimator, so that radiation of X-rays can be offset to the greatest extent.
Owner:EASTERN GANSU UNIVERSITY
Electrical sounding imaging method for unfavorable geology steering investigation of deeply-buried long tunnel
InactiveCN112748470AImprove detection accuracySimple methodElectric/magnetic detectionAcoustic wave reradiationAcousticsElectric resistivity
The invention discloses an electrical sounding imaging method for unfavorable geology steering investigation of a deeply-buried long tunnel. The electrical sounding imaging method comprises the following steps of: 1, longitudinally inserting a plurality of electrodes of an electrical prospecting instrument into the ground of a to-be-detected area at equal intervals; 2, feeding back induced voltage signals to a host through an acquisition station by each electrode of the electrical prospecting instrument; 3, acquiring distributed apparent resistivity data of different depths of a vertical section below an electrode longitudinal arrangement position of the electrical prospecting instrument; 4, transversely inserting the plurality of electrodes of the electrical prospecting instrument into the ground of the to-be-detected area at equal intervals; 5, feeding back the induced voltage signals by each electrode of the electrical prospecting instrument to the host through the acquisition station; 6, acquiring distributed apparent resistivity data of different depths of a vertical section below an electrode transverse arrangement position of the electrical prospecting instrument; and 7, acquiring three-dimensional apparent resistivity data of different depths. According to the invention, three-dimensional electrical sounding imaging of a geological structure can be realized, and the detection accuracy is improved.
Owner:WUHAN ENG SCI & TECH RESINST
An optical imaging structure
ActiveCN114296253BAdjustable display angleAchieve visual effectsAcquiring/recognising eyesOptical elementsDisplay deviceEngineering
The present invention relates to the technical field of display devices, in particular to an optical imaging structure, including: an optical imaging component, including a frame, a display screen, a light-emitting element, optical glass and a mirror surface, the optical glass is fixedly installed on one side of the frame, and the mirror surface is fixedly installed on the frame On the other side, several light-emitting elements are fixedly installed on the inner wall of the frame; the present invention presents an infinitely extended tunnel vision through repeated reflection between the mirror surface and the optical glass, and the image displayed on the display screen is in the middle of the infinitely extended tunnel Floating display, the image and the subsequent tunnel space form a visual distance difference, showing the visual effect of floating imaging. Through the detection of the viewer's position and data algorithm processing by the eye tracking device and holographic processing platform, the holographic image can be adjusted in time. The display angle enables the viewer to always observe the image angle of the correct perspective relationship, combined with the visual effect of floating imaging, so as to realize the visual effect of naked-eye 3D floating imaging.
Owner:北京谛听视界文化科技有限公司
A Finite-Difference Simulation Method for Seismic Wave Propagation in Precompressed Solid Media
ActiveCN112904417BSolve problems that cannot be accurately describedImaging results are accurateSeismic signal processingPerfectly matched layerClassical mechanics
The invention discloses a finite difference simulation method for seismic wave propagation in a pre-compressed fixed medium, which comprises the following steps: 1) using the elastic wave propagation equation described in the pre-compressed stress environment in the acoustoelastic technology to describe the wave propagation under the pre-compressed solid condition 2) Using the known elastic modulus of the rock, a uniform layered medium model is established; 3) Differential elastic wave propagation equations are used by the rotating staggered grid finite difference method; 4) The boundary of the uniform layered medium model in step 2) Apply unsplit convolution to perfectly match the layer absorption boundary; 5) Under different stress field conditions, use the rotating staggered grid finite difference method to perform acoustoelastic simulation on the uniform layered medium model, and verify the simulation accuracy; 6) Establish a double-layer medium model, Repeat steps 3)-5) to perform finite-difference simulation of seismic wave propagation in precompressed solid media to obtain seismic wave fields under different stress fields.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
An integrated device for water-induced fracturing stress measurement and induced fracture dynamic imaging
ActiveCN107829725BFast ground stress measurementImprove measurement efficiencyConstructionsFluid removalStress measurementStress measures
The invention provides a waterborne fracturing stress measurement and induction fracture dynamic imaging integration device, and belongs to the field of ground stress testing. The waterborne fracturing stress measurement and induction fracture dynamic imaging integration device comprises a fracturing packer, an ultrasonic wave imaging system and a push-pull valve, the ultrasonic wave imaging system is arranged on a flow dividing center rod of the fracturing packer, the ultrasonic wave imaging system and the fracturing packer can descend a well together, and real-time hole wall imaging is achieved, ground stress of a hole wall rock can be rapidly measured, hydraulic fracturing measurement and induction fracture imaging can be achieved only by descending the well once, ground stress measuring efficiency is greatly improved, the ultrasonic wave imaging system dynamically images in real time, and imaging results are more accurate and reliable.
Owner:INST OF GEOMECHANICS +1
Offset imaging method and device for undulating surface
PendingCN111999767AImaging results are accurateImproving Imaging AccuracySeismic signal processingEngineeringEarth surface
The invention provides a migration imaging method and device for an undulating surface. The method comprises the steps: carrying out static correction calculation of seismic data of a rugged surface through a preset horizontal unified reference surface, and obtaining CMP reference surface data; processing the seismic data of the rugged surface based on the CMP reference surface data to obtain horizontal stacking profile data; determining a preset rugged surface factor of each grid point in the horizontal superposition profile data; and carrying out wavelength continuation imaging on the horizontal superposition profile data from the rugged surface based on a preset fluctuating surface factor in the horizontal superposition profile data, and using the rugged factor for representing the rugged degree of the rugged surface and presetting the rugged surface factor of each grid point. According to the invention, migration imaging on the rugged surface can be realized, and the imaging precision is high.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Medical image full-wave-field imaging device and method
PendingCN112807017AHigh energyIncrease or decrease target recognitionUltrasonic/sonic/infrasonic diagnosticsInfrasonic diagnosticsMedical imagingWave impedance
The invention relates to the field of medical imaging, in particular to a medical image full-wave-field imaging device and method. The medical image full-wave-field imaging device comprises a collection platform, electric connectors, high-frequency ultrasonic transducers, a flexible film and a medium liquid, wherein a wearing opening is formed at one end of the basin-shaped collection platform, a spherical coating surface is formed to enclose the wearing opening, and a person to be detected wears the collection platform through the wearing opening; the electric connectors are distributed on the coating surface in a spherical array manner; each electric connector is electrically connected with one high-frequency ultrasonic transducer, and the high-frequency ultrasonic transducers are electrically connected with a pulse controller; the basin-shaped flexible film is positioned in the wearing opening, is tightly attached to the inner wall of the coating surface, is located on the inner side of the wearing opening to form a collection area for signal collection; and the flexible film is filled with the medium liquid. The liquid-state contact medium is designed, the energy of ultrasonic waves penetrating through a human body is increased, the wave impedance between the body surface and the outside is reduced, a stable observation system is formed, and the aim of high-precision imaging is achieved.
Owner:佟小龙 +3
A Fast Imaging Algorithm Based on Ultrasonic Ring Array Synthetic Aperture Reception
ActiveCN113552573BImprove performanceImaging results are accurateAcoustic wave reradiationRapid imagingAlgorithm
Owner:FUDAN UNIV
Pre-pressing solid medium seismic wave propagation finite difference simulation method
ActiveCN112904417AImaging results are accurateClear understandingSeismic signal processingSeismic wave propagationElastic modulus
The invention discloses a prepressing fixed medium seismic wave propagation finite difference simulation method, which comprises the following steps of: 1) describing a wave propagation condition under a prepressing solid condition by utilizing an acoustic elasticity technology to describe an elastic wave propagation equation under a prepressing stress environment; 2) establishing a uniform layered medium model by using a known rock elastic modulus; 3) differentiating the elastic wave propagation equation by using a rotary staggered grid finite difference method; 4) applying a non-split convolution complete matching layer to the boundary of the uniform layered medium model in the step 2) to absorb the boundary; 5) carrying out acoustic elasticity simulation on the uniform layered medium model by using a rotary staggered grid finite difference method under different stress field conditions, and checking simulation precision; and (6) establishing a double-layer medium model, repeating the steps (3)-(5), and carrying out prepressing solid medium seismic wave propagation finite difference simulation to obtain seismic wave fields under different stress fields.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
A sort of 18 The method and application of fast labeling cys-annexin V
ActiveCN105669855BGuaranteed location markerAvoid the problem of low imaging specificityRadioactive preparation carriersPeptide preparation methodsPET-CTMedicine
The invention belongs to the technical field of positron emission computed tomography (PET) imaging, and particularly relates to a method for rapidly marking Cys-Annexin V through <18>F and application of obtained <18>F-Al-NOTA-Cys-Annexin V in the aspect of detecting cell apoptosis. According to the method for rapidly marking Cys-Annexin V through <18>F, <18>F-Al-NOTA-Maleimide is adopted to mark Cys-Annexin V for the first time, the marking time used by the marking method is short, the marking rate is high, the fact of using <18>F for positioning and marking Cys-Annexin V is achieved, and <18>F-Al-NOTA-Cys-Annexin V maintains good affinity with PS, has a good imaging effect by serving as a PET imaging agent and has the more ideal imaging specificity.
Owner:JIANGSU INST OF NUCLEAR MEDICINE +1
Imaging device applied to endoscope
ActiveCN114041737AImaging results are accurateDiagnostics using spectroscopyEndoscopesVenous vesselEngineering
The invention relates to an imaging device applied to an endoscope, a light source assembly emits first-wave-band light to a measured object, the light intensity is larger than zero when the first-wave-band light penetrates into a blood vessel in the measured object, and therefore the first-wave-band light can penetrate into the blood vessel in the measured object; due to the fact that the absorption capacity of the blood vessel to the first-wave-band light is different from the absorption capacity of other tissues in the measured object to the first-wave-band light, the vein blood vessel of the measured object can be shown in the image obtained by imaging the first-wave-band light reflected by the measured object through an imaging assembly. Therefore, the image representing the deep vein morphology and distribution of the detected object can be obtained, and the imaging result of optical imaging of the detected object is more accurate.
Owner:WEST CHINA HOSPITAL SICHUAN UNIV
Imaging method and device based on orthogonal multiple frequency ultrasonic stable-state echo signal
InactiveCN101357068BImprove estimation accuracyHigh measurement accuracyUltrasonic/sonic/infrasonic diagnosticsInfrasonic diagnosticsControl cellAcoustics
The invention discloses an imaging method and a device on the basis of orthogonal multi-frequency ultrasonic steady echo signal. The method uses an orthogonal frequency division multiplexing modulation type to form multi-frequency continuous baseband signals which are orthogonal with each other; the multi-frequency continuous baseband signals are modulated as multi-frequency ultrasonic continuousemission signals and sent out by an ultrasonic probe; the ultrasonic probe detects the steady echo signals which are reflected back; the steady echo signals are equivalent to the superposing signals;the received multi-frequency continuous baseband signals after modulation are orthogonally decomposed, each path of receiving signals are decomposed by the characteristic that each path of signals are orthogonal with each other, the amplitude of each interface reflection echo and the position thereof corresponding to the incident interface are calculated so as to carry out the image forming. The device of the invention comprises an ultrasonic probe, a control unit, and an operation unit, a receiving / emitting unit, a processing unit and a display unit which are respectively connected with the control unit; the ultrasonic probe is connected with the receiving / emitting unit; the processing unit is respectively connected with the receiving / emitting unit and the display unit; the method and the device of the invention has precise image forming and good anti-interference performance, and reduces the cost by adopting a single probe.
Owner:SOUTH CHINA UNIV OF TECH
A Fidelity Imaging Method Based on Scalar Wavefield Extrapolation
ActiveCN108919352BDoes not destroy relative amplitudeAutomatically removes low wavenumber noiseSeismic signal processingWave equationWave detection
The invention relates to a fidelity imaging method based on wave field extrapolation of scalar wave. The method comprises the following steps: deriving a scalar wave equation describing the propagation law of a seismic wave field excited by an earthquake source in an underground medium according to the Newton's second law and the Hooke's law by assuming the underground medium as isotropy, uniformness and constant density; solving the scalar wave equation by using a finite difference method after knowing the underground smooth background speed and a seismic source sub-wave function, thereby obtaining the wave field amplitudes of the wave field at underground different space points at any time, and recording the wave field amplitude at a boundary when the wave field is propagated to the boundary of the numerical simulation; solving the scalar wave equation by regarding wave field amplitude at the boundary as a boundary value condition, thereby recovering the seismic source point end wavefield; solving the scalar wave equation by regarding the wave field received by a surface wave detector as the boundary value condition, thereby constructing a wave detection point end wave field; and performing the fidelity imaging on the seismic source point end wave field and the wave detection point end wave field through the fidelity imaging formula based on the wave field extrapolation of the scalar wave, thereby obtaining a fidelity imaging result of an underground reflection coefficient.
Owner:CHINA NAT OFFSHORE OIL CORP +1
An Inverse Synthetic Aperture Radar Azimuth Calibration Method
ActiveCN104391286BImaging results are accurateImprove estimation accuracyRadio wave reradiation/reflectionSynthetic aperture radarRadar
Owner:NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
High-efficiency pre-imaging fusion method and system for borehole radar
InactiveCN111025290AAvoid separate imagingImprove reliabilityRadio wave reradiation/reflectionComputational scienceBorehole radar
The invention discloses a high-efficiency pre-imaging fusion method and a high-efficiency pre-imaging fusion system for a borehole radar. The method comprises the following steps: sampling a to-be-imaged space around a well hole by utilizing borehole radar systems of a plurality of systems, and storing radar echo data obtained by sampling in a plurality of two-dimensional data matrixes U1, U2,...UN-1, UN, UN+1,..., UM; removing direct wave signals and interference signals in the sampling data matrix Um (m=1, 2,..., M); initializing a three-dimensional data matrix D; performing dimension expansion processing on the sampling data matrix Um, and expanding the sampling data in the Um (m=1, 2,..., M) to the initialized three-dimensional data matrix D according to the space coordinate vector Tmcorresponding to the mth data matrix; and performing calculation to obtain a target space imaging result based on the three-dimensional data matrix D after data expansion. The method can solve the fusion problem during radar data imaging of different systems and improve the imaging speed and the data utilization rate.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Electrical impedance imaging method and device, storage medium and electronic equipment
PendingCN114711746AImaging results are accurateAccurate electrical impedance imaging resultsDiagnostic recording/measuringSensorsEngineeringElectrical impedance imaging
The invention provides an electrical impedance imaging method and device, a storage medium and electronic equipment, and relates to the technical field of electrical impedance imagines.The method is applied to an electrical impedance imaging system, the electrical impedance imaging system comprises a plurality of electrodes arranged in a to-be-detected area, and the method comprises the steps that when it is detected that a disabled electrode exists in the multiple electrodes, the disabled electrode is detected, and the to-be-detected area of the to-be-detected area is detected; grouping the electrodes except the disabled electrode in the plurality of electrodes by adopting a preset electrode grouping interval to obtain a first electrode group set; taking the first electrode group set as a first excitation electrode group; taking the first electrode group set as a first measuring electrode group; and performing electrical impedance imaging on the to-be-measured area based on the first excitation electrode group and the first measurement electrode group. According to the technical scheme provided by the invention, an accurate electrical impedance imaging result can still be obtained in the presence of the disabled electrode.
Owner:BEIJING HUARUI BOSHI MEDICAL IMAGING TECH CO LTD
A passive source interference migration imaging method and system based on illumination direction constraints
ActiveCN113866821BLow costImaging results are accurateSeismic signal receiversRadiologyComputer vision
The present application discloses a passive source interference migration imaging method and system based on illumination direction constraints. The method includes interferometric processing of single-point pulse passive source seismic records to obtain a passive source deconvolution function; The function is subjected to oblique superposition processing to obtain the effective illumination information direction; based on the deconvolution function and the effective illumination information direction, the offset imaging result is obtained. The system includes a deconvolution module, an illumination analysis module and an imaging module; the deconvolution module is used to interferometrically process the seismic records of the single-point pulse-type passive source to obtain a deconvolution function; the illumination analysis module is used to deconvolution The function performs oblique superposition processing to obtain the effective illumination information direction; the imaging module obtains the offset imaging result according to the deconvolution function and the effective illumination information direction. The present application can extract the effective information contained in the data and obtain accurate imaging results under the condition that the traditional assumptions are not satisfied.
Owner:JILIN UNIV
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