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56 results about "Magnetic survey" patented technology
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Magnetic survey is one of a number of methods used in archaeological geophysics. Magnetic surveys record spatial variation in the Earth's magnetic field. In archaeology, magnetic surveys are used to detect and map archaeological artefacts and features. Magnetic surveys are used in both terrestrial and marine archaeology.
Airborne vector magnetic surveys
InactiveUS20050116717A1Reduce noiseImprove performanceStray field compensationAcoustic wave reradiationMagnetic tension forceMagnetic effect
An aircraft equipped for airborne vector magnetic exploration surveys comprising three magnetometers orthogonally mounted to measure the components of the earth's vector magnetic field; two rotation sensors mounted to measure the angular orientation of the aircraft; and a recording system to record the measurements of the magnetometers, and rotation sensors. The measured angular orientation is used to orientate the measured components of the earth's vector magnetic field to derive true vector acro-magnetic (VAM) data from airborne surveys. Also disclosed is a method for processing magnetic data by removing the permanent, induced, and eddy-current magnetic effects of the aircraft from the magnetic data.
Owner:FUGRO FINANCE
Time Lapse Analysis with Electromagnetic Data
ActiveUS20090005994A1Electric/magnetic detection for well-loggingMeasurement arrangements for variableFluid saturationOnline and offline
Method for determining time-dependent changes [73] in the earth vertical and horizontal electrical resistivity and fluid saturations from offshore electromagnetic survey measurements. The method requires both online and offline data, which should include at least one electromagnetic field component sensitive at least predominantly to vertical resistivity and another component sensitive at least predominately to horizontal resistivity [62]. Using a horizontal electric dipole source, online Ez and offline Hz measurements are preferred. For a horizontal magnetic dipole source, online H2 and offline E2 data are preferred. Magnetotelluric data may be substituted for controlled source data sensitive at least predominantly to horizontal resistivity. Maxwell's equations are solved by forward modeling [64,65] or by inversion [66,67], using resistivity models of the subsurface that are either isotropic contrast, and [64,66] or anisotropic [65,67]. Fluid saturation is determined from the vertical and horizontal resistivities using empirical relations or rock physics models [70].
Owner:EXXONMOBIL UPSTREAM RES CO
Cenozoic magmatic copper polymetallic ore prospecting method
InactiveCN108761564AGreat Prospecting BreakthroughEarth material testingGeological measurementsPetrochemicalCenozoic
The invention discloses a cenozoic magmatic copper polymetallic ore prospecting method. The method comprises the following steps: determining a magmatic zone or an abnormal area (zone) according to magmatic ore deposit and spot output space-time and geological background; preliminarily determining prospecting targets and target classification by virtue of stream sediment measurement; selecting zones having excellent copper mineralization or molybdenum mineralization or excellent abnormality in target classification for performing magnetic survey verification, and determining a first precedencetarget area or a first abnormal area; determining a second precedence target area or a second abnormal area in the first precedence target area or the first abnormal area by adopting high resolutionremote sensing; performing on-the-spot survey inspection on the second precedence target area or the second abnormal area, and finding out a geologic abnormal area (zone) or a mineralization clue area; performing soil profile or petrochemical profile measurement according to 1:10000, and determining the ore-bearing geological body position on the surface and mineralized body features; performing shallow exposure recourse to control the specific location and shape of the mineralized zone or mineralized body by utilizing trenching; and determining the depth grade thickness scale and occurrence conditions of the mineralized body by utilizing drilling, and discovering the metal ore or ore deposit.
Owner:青海省地质调查院
Electromagnetic and its combined surveying apparatus and method
ActiveUS20120262179A1Easy to implementEasy to moveSeismologyDetection using electromagnetic wavesGeophoneAccelerometer
An electromagnetic and its combined surveying apparatus and method, utilizing small-sized one or three-dimensional magnetic field sensors with high dynamic range and high sensitivity, which can be used together with highly populated receivers for the electromagnetic exploration. The electrical field could be derived from the vertical component of the magnetic field of the highly populated receivers and the magneto-telluric data could be derived by measuring the three components of the magnetic data. Moreover, by means of connecting the same populated receivers with geophones or MEMS accelerometers, and moving the seismic sources together with the mobile electromagnetic source, seismic survey could be carried out. It is therefore able to undertake the interpretation of the seismic, electromagnetic and magneto-telluric data and perform a combined field exploration
Owner:WHAN WEN J
Unmanned aerial vehicle semi-aviation time domain electromagnetic detection data analysis and interpretation method
InactiveCN112068212ACancel motion noiseExploration fastHeight/levelling measurementElectric/magnetic detectionAviationEngineering
The invention discloses an unmanned aerial vehicle semi-aviation time domain electromagnetic detection data analysis and interpretation method, and belongs to the technical field of geophysical aviation electromagnetic exploration. The method comprises the following steps of a, preprocessing survey line data to eliminate a motion noise; b, performing spectral analysis and digital filtering processing on secondary field data; c, forming data to be imaged or inversely interpreted; and d, performing one-dimensional rapid inversion on the superimposed and lane-drawn secondary field data, establishing an underground electrical structure profile, and performing geological interpretation on an inversion imaging result in combination with geological data to form a comprehensive interpretation result. On the basis of ground grounding long wire source emission, an aerial unmanned aerial vehicle receives semi-aviation time domain electromagnetic detection data of an observation mode, and the method can quickly complete processing, analysis and explanation work while guaranteeing higher detection precision, and can realize quick exploration in a smaller area range.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
Ground three-component magnetic orientation method and ground three-component magnetic orientation exploration device
InactiveCN105572749ARich space geomagnetic field parametersHigh precisionElectric/magnetic detectionAcoustic wave reradiationMagnetic orientationTitanium alloy
The invention provides a ground three-component magnetic orientation method which can finish sensor three-axis self orthogonal correction and sensor three-axis coordinate and geographical coordinate conversion. The invention furthermore provides an oriented exploration device based on the ground three-component magnetic orientation method. The oriented exploration device comprises a probe, a controller module, a clock control module and a power module. The probe comprises a sleeve which is internally provided with a non-magnetic titanium alloy trough in which a sensor module is mounted. The sensor module comprises a positioning module, a flux gate sensor and an inertia measurement module. The positioning module, the flux gate sensor, a matrix keyboard and a liquid crystal display module are connected with the controller module. The ground three-component magnetic orientation method and the ground three-component magnetic orientation exploration device can perform quick measurement and furthermore can acquire spatial geomagnetic field parameters which are more abundant than that of a traditional proton magnetometer, thereby providing omnibearing geophysical data for geological prospecting. Furthermore the ground three-component magnetic orientation method and the ground three-component magnetic orientation exploration device can settle a point fixing problem in field survey grid and realize one-step completion in field three-component magnetic survey.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Comprehensive prospecting method for multi-metal minerals
InactiveCN110824582AGreat Prospecting BreakthroughLarge detection depthGeomodellingGeological measurementsMetallogenyGold ore
The invention discloses a comprehensive prospecting method for multi-metal minerals, and provides a prospecting method integrated with a mineralization system, water system sediment measurement, rockdebris measurement, large-scale geophysical and chemical prospecting profile / high-precision magnetic survey and engineering verification, and a huge prospecting breakthrough is obtained in the prospecting process. Through the implementation of the combination method, the limitation of shallow coverage conditions on conventional geological mapping can be effectively avoided, a prospecting target area can be rapidly shrunk in a quaternary coverage area, and spatial positioning of a mineralization alteration zone and an ore-bearing geologic body is achieved, so that the prospecting success rate is increased accordingly, and the method has the advantages of being short in prospecting period, high in efficiency and low in prospecting cost and is suitable for prospecting of shallow vein-shaped copper-lead-zinc-silver-gold ores and skarn-type iron-copper ores; and the wide-area electromagnetic method has the absolute advantage of large detection depth, and is suitable for exploration of deepconcealed porphyry type copper-molybdenum ores by combining an ore prospecting prediction geological model established according to geological characteristics and a speculated concealed ore-bearing porphyry body range.
Owner:马忠元
Semi-aviation transient electromagnetic conductivity-depth imaging method and device
PendingCN113534270AMake up for the defects of conductivity-depth fast imaging of electromagnetic detection dataOvercome the "dual value" problemElectric/magnetic detection for transportAcoustic wave reradiationComputational scienceRapid imaging
The invention relates to the technical field of geophysical aviation electromagnetic exploration, in particular to a semi-aviation transient electromagnetic conductivity-depth imaging method and device. According to the semi-aviation transient electromagnetic method, the electromagnetic response query database conforming to the actual situation is simulated in advance according to the actual situation, then the detected electromagnetic response data are searched in the database, repeated iterative calculation is not needed like inversion, rapid imaging can be conducted through the semi-aviation transient electromagnetic method, and a preliminary imaging result and an inversion initial model are rapidly obtained, preliminary geological inference data are provided for an area without geological data, an accurate geological model can be provided for an inversion process, and the defect of current unmanned aerial vehicle semi-aviation time domain electromagnetic detection data conductivity-depth rapid imaging is overcome.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
System and method for unmanned aerial vehicle-based magnetic survey
PendingUS20210372793A1Short flight timeImprove staminaNavigational calculation instrumentsUnmanned aerial vehiclesPetroleum oilMechanical engineering
There are approximately 35,000 abandoned and unplugged oil and gas wells in New York with no known location. Unplugged wells emit methane, a strong greenhouse gas, which has the potential to significantly contribute to global climate change and act as a pollutant chemical. A long-range UAV equipped with methane sensors, MagPike (atomic magnetometer), and LiDAR sensors successfully detected unmarked well sites using characteristic magnetic signals generated by vertical metal piping preserved in the ground. The optimal flight altitude and transect spacing was determined for detection driven by the total field strength of the Earth's magnetic field and the height of tree canopies determined by LiDAR. Traditional methods of identifying oil and gas wells are costly and less powerful in acquisition of data such as using large magnetometers attached to helicopters.
Owner:THE RES FOUND OF STATE UNIV OF NEW YORK
Multi-station analysis of magnetic surveys
ActiveUS8280638B2Energy efficient ICTElectric/magnetic detection for well-loggingMagnetic measurementsMagnetization
A multi-station gravity and magnetic survey is carried out in a borehole. The data from the survey are processed to estimate the inclination and azimuth of the borehole. The drill collar relative permeability is estimated, and the estimated drill collar permeability is then used to remove the effects of induced magnetization of the drill collar on the magnetic measurements.
Owner:BAKER HUGHES INC
Upper continuation and lower continuation method for multilayer equivalent source of magnetic survey data
ActiveCN111856598AFast, efficient and accurate generationHigh precisionElectric/magnetic detectionComplex mathematical operationsMagnetic dipComputational physics
The invention provides an upper continuation and lower continuation method for a multilayer equivalent source of magnetic survey data. The method comprises the steps of S1, inputting magnetic field data, and establishing a topographic relief curved surface according to topographic height information of an area where a relief observation curved surface is located; S2, determining a spatial range ofmesh generation, performing continuous structured non-uniform mesh generation, and further determining an inversion model solving space; S3, according to the magnetic inclination angle, the magneticdeclination angle and the magnetic induction intensity of the geomagnetic field, performing integral equation three-dimensional inversion calculation with a depth regularization factor, a positive value constraint term and a regularization term on the magnetic field data based on an inversion model solving space to obtain a multi-layer equivalent source model of a magnetic anomalous body; and S4,performing magnetic field forward modeling calculation based on an integral equation by utilizing the multilayer equivalent source model to obtain magnetic field data after upper continuation and / or lower continuation generated by the magnetic anomalous body. The method has the beneficial effects that the required upper continuation or lower continuation data can be adaptively, quickly, efficiently and accurately generated for the magnetic anomalous body.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Device and method for testing turning diameter of superconducting strip
ActiveCN110703165ASuperconductive properties measurementsElectrical/magnetic diameter measurementsHigh temperature superconductingEngineering
The invention provides a device and a method for testing the turning diameter of a superconducting strip. The device comprises: a strip discharging end capable of placing a superconducting strip to betested; a strip receiving end connected with one end of the superconducting strip to be tested and capable of recycling the superconducting strip to be tested from the strip discharging end; and a turning diameter test board, comprising a bending diameter test piece of a variety of bending diameters and capable of bypassing the superconducting strip to be tested to bend the superconducting stripto be tested according to the corresponding being diameter. The device provided by the invention can be used for quickly testing the critical turning diameter value of the superconducting strip through the bending diameter test piece of a variety of bending diameters, and can quickly, effectively and accurately measure the single-bending and double-bending critical turning diameter values of the high-temperature superconducting strip by combining the twice tests via a magnetic survey method.
Owner:SHANGHAI JIAO TONG UNIV
Transient electromagnetic exploration device and method based on eccentric coil compensation
ActiveCN110989010AReduce coupling effectAchieve weak couplingElectric/magnetic detectionAcoustic wave reradiationTransmitter coilClassical mechanics
The invention relates to the field of geophysical exploration equipment, in particular to a transient electromagnetic exploration device and method based on eccentric coil compensation. The device comprises: a dragging vehicle platform and a height-adjustable high platform. The dragging vehicle platform and the high platform are arranged in parallel; a transmitting coil is laid on the dragging vehicle platform, a receiving coil and a magnetic compensation ring are laid on the plane of the high platform, the receiving coil is eccentrically laid across the transmitting coil, the initial positionof the magnetic compensation ring is located on the high platform and is concentric with the transmitting coil, and the position of the magnetic compensation ring is movably adjusted according to thecondition that a received signal is smaller than a threshold value. According to the invention, a double-platform structure is adopted, the receiving coil is laid at the high platform above the dragging platform, the change degree of the magnetic field intensity of the plane of the high platform is relatively gentle, the weak coupling of the transmitting coil and the receiving coil is realized, and the influence of the physical error of the structure is minimized in the subsequent adjustment process.
Owner:JILIN UNIV
Resistivity correction method based on stratum simulation
ActiveCN111255446AReduce testing costsTrue Inversion ResultsBorehole/well accessoriesLithologyPorosity
The invention discloses a resistivity correction method based on stratum simulation. The method comprises the following steps of establishing a theoretical model of different lithology resistivity changing with factors including temperature, pressure and porosity through laboratory testing, correcting logging data of rock electrical property in a measuring area and laboratory measurement data to corresponding stratum conditions, and establishing an effective geoelectric initial model. According to the method, the temperature and pressure environments of different depths of the measuring area where the rock sample is positioned are simulated, the complex resistivity amplitude and phase of the rock under different depth conditions are measured, the relation between the rock induced polarization parameter and the temperature and pressure is obtained, then existing geoelectric data is corrected, an initial geoelectric model under the electromagnetic exploration significance is obtained, the purpose is to solve the problem that logging data, laboratory data and exploration conditions of rock geoelectric are not matched, and an important parameter basis is provided for electromagnetic exploration inversion interpretation and evaluation.
Owner:YANGTZE UNIVERSITY
Frequency domain electromagnetic exploration method for acquiring resistivity based on horizontal electric field and magnetic field
ActiveCN112946762ARealize ground detectionEasy to operate in the fieldElectric/magnetic detectionAcoustic wave reradiationElectromagnetic responseEmission efficiency
The invention discloses a frequency domain electromagnetic exploration method for acquiring resistivity based on a horizontal electric field and a magnetic field. The method comprises the following steps of S1, arranging an observation device, wherein the observation device comprises a transmitter, two power supply electrodes A and B, a measuring point provided with a measuring electrode, and a receiver capable of simultaneously observing the electric field and the magnetic field; S2, enabling the observation device to work normally, receiving an electromagnetic response signal fed back by the measuring point by the measuring equipment, and sending the electromagnetic response signal to a processing device; and S3, the processing device calculating apparent resistivity of different frequencies of the position where the measuring point is located according to the electromagnetic response signal, and the stratum information being obtained through qualitative analysis and quantitative calculation. As the method has no orientation limitation on an electric field and a magnetic field, wide-azimuth electromagnetic ground detection can be realized, and field construction efficiency is greatly improved; and secondly, the apparent resistivity is strictly defined based on an electric field and magnetic field component formula, so the geoelectric information can be accurately reflected, and the influence of the field source emission efficiency on electromagnetic sounding can be eliminated.
Owner:CENT SOUTH UNIV
Static displacement correction method and device in controlled source electromagnetic method measurement and intelligent terminal
ActiveCN110989006AReduce the impactImprove exploration accuracyElectric/magnetic detectionAcoustic wave reradiationComputational physicsElectric field
The invention provides a static displacement correction method and device in controlled source electromagnetic method measurement and an intelligent terminal, and relates to the technical field of geophysical electromagnetic exploration. The method comprises the steps of: acquiring a measurement magnetic field and a measurement electric field at a receiving region measurement point corresponding to an excitation field source of an electrical source; calculating a corrected apparent resistivity based on the measurement magnetic field; and acquiring a correction electric field according to the corrected apparent resistivity, and correcting the measurement electric field based on the correction electric field. According to the invention, the influence of static displacement on acquired data in controlled source electromagnetic method detection is effectively reduced, and the exploration precision is improved.
Owner:中国地质科学院地球物理地球化学勘查研究所
Underground exploring tube and three-component magnetic survey system
PendingCN111830571AImprove accuracyExcellent horizontal component measurement accuracySurveyMagnetic measurement environmental aspectsMineral SourcesGeophysics
The invention relates to an underground exploring tube and a three-component magnetic survey system. The underground exploring tube comprises a shell (11), a three-component sensor module (12) arranged in the shell (11), a data measurement modulation transmission module (13) connected with the three-component sensor module (12), and a power supply module (14) connected with the three-component sensor module (12) and the data measurement modulation transmission module (13), wherein a non-magnetic vacuum heat preservation pipe used for wrapping the three-component sensor module (12) and the datameasuring, modulating and transmitting module (13) is arranged in the shell (11). The underground exploring tube is advantaged in that accuracy of deep positioning and inference interpretation of deep ore body (3000-5000m) exploration is improved, and a powerful support is provided for searching deep and hidden mineral resources.
Owner:中国地质科学院地球物理地球化学勘查研究所
Method for constructing multi-layer equivalent source model computational pole and converting data types
ActiveCN111880236ADesign optimisation/simulationSpecial data processing applicationsMagnetic susceptibilityData transformation
The invention discloses a method for constructing a multi-layer equivalent source model computational pole and data type conversion, which comprises the following steps of: inputting magnetic survey data, and performing non-uniform mesh generation on a free space and an underground space according to factors such as an observation position, height data and the like of the observation data; performing three-dimensional inversion calculation on the magnetic measurement data by utilizing a multilayer equivalent source inversion method based on an integral equation, and constructing a multilayer equivalent source model; and utilizing the built multilayer equivalent source model to perform pole transformation and data conversion calculation of the vertical magnetization geomagnetic field, wherein magnetic measurement data is calculated based on a three-dimensional forward modeling calculation method of an integral equation so as to obtain a pole transformation and data type conversion result. According to the method, a calculation framework of an equivalent source model is reconstructed on the basis of an integral equation theory, and high-precision processing of magnetic anomaly data containing a strong demagnetization effect generated by a high-magnetic susceptibility field source is achieved; moreover, the depth regularization factor is adopted, and the adaptive estimation of thedepth position of the multilayer equivalent source model by using the inversion process is realized.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Method for measuring rotating attitude of flying projectile body based on geomagnetic elements
ActiveCN110986926ANavigational calculation instrumentsNavigation by terrestrial meansPitch angleClassical mechanics
The invention discloses a method for measuring the rotating attitude of a flying projectile body based on geomagnetic elements. The method comprises the following steps: 1) solving the multi-value problem of By according to the mathematical characteristics of Bz; 2) solving a reference angle phi 0; 3) solving a rolling angle phi i; 4) solving the multi-value problem of the pitch angle theta according to the positive and negative values of By; and 5) iteratively correcting the tracking yaw angle psi. The method can effectively solve the problems that a three-axis magnetoresistive sensor schemecannot independently solve the roll angle, the deviation angle and the pitch angle of the flying projectile body, and the like. The successful development of the method lays a solid foundation for thedevelopment of high-precision magnetic survey guided weapons.
Owner:NANJING UNIV OF SCI & TECH
Design method for deep well three-component magnetic survey system
PendingCN111913225AImprove accuracyHigh measurement accuracyElectric/magnetic detection for well-loggingWater resource assessmentMineral SourcesTelecommunications link
The invention relates to a design method for a deep-well three-component magnetic survey system, and the method comprises the steps: S1, generating an exploring tube structure scheme of an undergroundexploring tube in the deep-well three-component magnetic survey system based on the physical environment of the depth detected by the deep-well three-component magnetic survey system, generating a ground acquisition control system scheme of a ground acquisition control system of the deep well three-component magnetic survey system; s2, generating an exploring tube test scheme of the underground exploring tube based on the exploring tube structure scheme; and S3, generating a communication link scheme for establishing communication connection between the underground exploring tube and the ground acquisition control system based on the exploring tube structure scheme and the ground acquisition control system scheme. According to the scheme, the accuracy of deep positioning and inference interpretation of deep ore body (3000-5000m) exploration is improved, and a powerful support is provided for searching deep and hidden mineral resources.
Owner:中国地质科学院地球物理地球化学勘查研究所
Transient electromagnetic multi-parameter constraint inversion imaging method for sedimentary strata
PendingCN113176617AGuaranteed to be close to realityPrevent jumpingElectric/magnetic detectionAcoustic wave reradiationClassical mechanicsGeological exploration
The invention relates to a transient electromagnetic multi-parameter constraint inversion imaging method for sedimentary strata. According to known drilling data, a geological prospecting profile map, geological or regional geological data and other geophysical prospecting data conforming to geological laws, an inversion initial model suitable for sedimentary stratum ground transient electromagnetic prospecting is constructed; transverse space constraint conditions such as formation resistivity, formation thickness and formation interface and prior information constraint conditions such as formation resistivity and formation thickness are added, under the constraint conditions, the data inversion fitting difference and the mean square error of known prior information are extremely small at the same time, and it can be guaranteed that the inversion result is close to the actual situation as much as possible. According to the method, the stratigraphic interface constraint condition is added, the stratigraphic thickness corresponding to each measuring point is adjusted according to the actual situation, then inversion imaging is carried out by adopting the transverse constraint stratigraphic resistivity, the inversion result can well conform to the actual geoelectric model for the inclined strata, and jumping of local measuring points can be suppressed.
Owner:XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
Method and system for measuring flight parameters of spinning projectile based on ballistic prior knowledge
PendingCN114707317AHigh precisionImprove reliabilityAmmunition testingDesign optimisation/simulationClassical mechanicsMagnetic survey
According to the rotating missile flight parameter filtering method and system based on ballistic prior knowledge, a system state equation taking a rotating missile attitude quaternion q as a filter state variable and a system observation equation taking a magnetic survey resolving system quaternion qMR as a filter observation variable are selected; resolving the quaternion qMR of the magnetic survey resolving system through the missile body attitude quaternion matrix; further constructing a projectile attitude filtering model, completing optimal filtering estimation calculation of the state equation X (k) by adopting a Kalman filtering algorithm to obtain rotating projectile attitude quaternion optimal estimation, substituting the rotating projectile attitude quaternion optimal estimation into a projectile attitude quaternion matrix, calculating to obtain an optimal projectile attitude quaternion matrix, and calculating a projectile speed Vn and a projectile flight position Pn; and real-time flight parameter measurement of the spinning projectile is completed, so that the accuracy and reliability of testing the state of the spinning projectile are effectively improved.
Owner:HUIZHOU UNIV
A full-coverage anti-interference artificial source electromagnetic detection method
ActiveCN110703342BFlexible layoutFull Coverage GuaranteedMagnetic property measurementsTransmissionElectric field sensorAnti jamming
The present invention provides a full-coverage anti-interference artificial source electromagnetic detection method, comprising the following steps: (1) determining the range and position of the survey area; (2) field survey, determining the position of the transmitting source and the angle of the transmitting antenna; (3) Calculate the maximum polarization direction angle of the electric field generated by the antenna at the measuring point; (4) lay out the electric field sensor according to the polarization direction; (5) calculate the apparent resistivity of each measuring point. The method of the invention can obtain the earth resistivity by using the obtained reliable data with a high signal-to-noise ratio, the field construction is flexible and convenient, the construction efficiency is high and the cost is low, the method is reliable and effective, and the invention provides a new direction for the development of the electromagnetic prospecting method.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Instrument fixing device for water area magnetic survey
PendingCN112882108AImprove stabilityImprove accuracyWater resource assessmentElectric/magnetic detectionObservation dataEngineering
The invention relates to an instrument fixing device for water area magnetic survey. The device comprises a bottom plate, a box body and a probe rod, the bottom plate is fixed on a ship body, the box body is fixed on the bottom plate, one end of the probe rod is arranged and fixed in the box body, and the other end of the probe rod is used for being connected with a magnetometer probe. The influence of human factors is reduced, the stability of the magnetometer probe and the accuracy of the north direction pointing are improved, and therefore the accuracy of observation data is improved.
Owner:安徽省勘查技术院
Forward and reverse modeling method for magnetic measurement data under demagnetization effect based on integral equation
ActiveCN113139289AReduce mistakesIn line with the real environmentWater resource assessmentDesign optimisation/simulationReverse modelingMaterials science
The invention provides a forward and reverse modeling method for magnetic measurement data under a demagnetization effect based on an integral equation, and the method comprises the following steps: determining a space range of mesh generation according to an underground target region, and carrying out the mesh generation of the space range through an orthogonal mesh; setting a magnetic inclination angle, a magnetic declination angle and magnetic induction intensity of a geomagnetic field; setting an observation position, and obtaining magnetic measurement data at the observation position under the consideration of the demagnetization effect by utilizing a magnetic measurement data forward modeling calculation method under the demagnetization effect based on an integral equation; and inputting magnetic field observation data, carrying out model optimization calculation through a magnetic survey data inversion method based on an integral equation under a demagnetization effect in combination with a regularization item, and carrying out inversion calculation on an underground target to obtain an inversion result. According to the method, the magnetic measurement data forward modeling under the condition of considering the demagnetization effect can be calculated, and the inversion under the condition of considering the demagnetization effect can be carried out according to the magnetic measurement data.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Rapid stitching method for magnetic anomaly grid
ActiveCN111045090AEasy to operateImprove effectivenessElectric/magnetic detectionAcoustic wave reradiationUranium mineEngineering
The invention belongs to the technical field of uranium mine geophysical exploration, and particularly relates to a rapid stitching method for a magnetic anomaly grid. The method comprises the steps of 1, dividing a uranium resource exploration area into an area A and an area B to carry out ground high-precision magnetic survey respectively, and carrying out different scales in the two areas, wherein the area A and the area B are partially overlapped in magnetic data, and grid diagrams are formed respectively; 2, carrying out reduction to the pole treatment on the grid diagrams in the step 1;3, performing trend surface removal on the two grid diagrams in the step 2; 4, starting to stitch the grids with the trend surface being removed in the step 3; 5, selecting a weight for grid diagram correction; 6, expanding the correction width of the grid diagrams to obtain corrected grid diagrams; and 7, interpolating the two corrected grid diagrams in the step 6, and repeating the steps 3-7 until a finally stitched grid diagram is formed. According to the invention, the magnetic anomaly data of the same measurement area can be spliced and integrated accurately and quickly.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
A comprehensive method of geophysical and geochemical prospecting for identifying hidden volcanic rock-type uranium mineralization information
InactiveCN104615843BAccurate identificationSpecial data processing applicationsUranium mineralizationProspecting
The invention belongs to the field of uranium resource prospecting and particularly relates to a geophysical and geochemical prospecting comprehensive method for recognizing hidden volcanite-type uranium mineralization information. The method includes the following steps that firstly, the geophysical and geochemical prospecting survey is conducted; secondly, the mean value and the mean square error are calculated; thirdly, the magnetic survey data first vertical derivative is calculated, and normalization processing is conducted; fourthly, the information contrast is calculated; fifthly, indicators for geochemical prospecting are calculated; sixthly, the ore prospecting potentiality is analyzed. The method can be used for accurately recognizing the geophysical and geochemical prospecting comprehensive abnormal information relevant to deep hidden volcanite-type uranium mineralization, and a basis is provided for building the hidden volcanite-type uranium mineralization prospecting index.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Magnetic storm prediction method and device based on multi-modal representation learning and storage medium
PendingCN112069717AImprove accuracyThe geomagnetic discriminant feature is goodKernel methodsDesign optimisation/simulationFeature extractionAlgorithm
The invention discloses a magnetic storm prediction method and device based on multi-modal representation learning and a storage medium. The method comprises the steps that satellite magnetic survey data and solar high-energy particle data are input through an input module; the extraction module extracts a first feature of the satellite magnetic survey data; a second feature of the solar high-energy particle data is extracted; geomagnetic discrimination features are extracted according to the first features and the second features; a geomagnetic index is obtained according to geomagnetic discrimination feature classification; the complementarity of the first feature and the second feature is utilized to eliminate the redundancy of the first feature and the second feature, so as to learn better feature representation, improve the classification accuracy and further improve the magnetic storm prediction effect.
Owner:WUYI UNIV
A transient electromagnetic prospecting system and method based on controllable source compensation
ActiveCN109946744BEliminate the effects ofMeet the requirements of transient responseElectric/magnetic detectionAcoustic wave reradiationTransmitter coilInterference (communication)
Owner:JILIN UNIV
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