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36 results about "Magnetic analysis" patented technology
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Electromagnetic transient analysis method and device of coaxial cable, computer equipment, readable storage medium and program product
InactiveCN119294337AGeometric CADSpecial data processing applicationsTransient stateElectrical conductor
The invention relates to an electromagnetic transient analysis method and device of a coaxial cable, computer equipment, a readable storage medium and a program product. The method comprises the following steps: determining the size of a simulation area of the coaxial cable based on the real size of the coaxial cable, and dividing the simulation area of the coaxial cable into a plurality of grids based on the size of the simulation area and a preset rule; on the basis of the magnetic conductivity, the dielectric constant and the conductivity of the outer conductor and the magnetic conductivity, the dielectric constant and the conductivity of the inner conductor, constructing loss impedance of the coaxial cable per unit length to obtain target loss impedance of the coaxial cable per unit length; based on the corrected dielectric constants and the corrected magnetic conductivities corresponding to the grids and the target loss impedance, an electromagnetic analysis model corresponding to the simulation area is constructed; and obtaining an electromagnetic transient analysis result of the coaxial cable based on the electromagnetic analysis model. By adopting the method, electromagnetic transient analysis of the coaxial cable can be realized.
Owner:ELECTRIC POWER RES INST CHINA SOUTHERN POWER GRID CO LTD +1
Nuclear magnetism-resistivity combined measurement method for occurrence and migration of fluid in rock core
ActiveCN119715650ASurface/boundary effectAnalysis using nuclear magnetic resonanceRock coreFluid migration
The invention provides a nuclear magnetism-resistivity combined measurement method for occurrence and migration of fluid in a rock core. The nuclear magnetism-resistivity combined measurement method comprises the steps that the rock core is dried and cooled to the room temperature; applying a specified confining pressure to the rock core and keeping the confining pressure constant; measuring background resistivity distribution of the rock core, and closing the resistivity analyzer; opening a liquid pump and a liquid inlet valve, and stopping pumping when the liquid level of the fluid is flush with the upper surface of the sponge; performing nuclear magnetic resonance imaging on the rock core, dividing the rock core into a plurality of observation sections in the longitudinal direction, and ensuring that at least one observation section is formed at the place with the conductivity probe; turning off the nuclear magnetic analysis system and the nuclear magnetic resonance imaging system, and measuring the resistivity of the rock core; nuclear magnetic measurement and resistivity measurement are carried out alternately; calculating a fluid migration rule in a spontaneous imbibition process to simulate a soaking process; and calculating a fluid migration rule in a gas driving process, and realizing nuclear magnetism-resistivity combined measurement of fluid occurrence and migration. The method can effectively avoid the interference of magnetic polarization on the resistivity test in the nuclear magnetic measurement process, and is high in measurement precision.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Multi-software combined special-shaped superconducting coil structure design method
The invention discloses a multi-software combined special-shaped superconducting coil structure design method, and aims to optimize a modeling mode of a special-shaped superconducting coil and improve modeling efficiency on the premise of ensuring result precision. According to the method, for a three-dimensional special-shaped complex superconducting magnet structure, a platform is built based on a Python language, and a multi-software combined geometric modeling system is built by combining mechanical design software SolidWorks, finite element software Abaqus and electromagnetic analysis software Opa-3d. The method comprises the following steps: firstly, establishing a geometric model through SolidWorks software, and outputting the geometric model in a general file format; and then, importing the geometric file into Abaqus to carry out automatic unit division. Geometric model data files of the divided units are obtained through calculation, geometric coordinates of unit nodes are read in sequence, the geometric coordinates are arranged into coil geometric data files which can be recognized by Opera-3d, and finally geometric modeling is completed in Opera-3d. According to the method, the blank that the coil in Opera-3d cannot be directly imported through mechanical design software is filled up, and the geometric modeling mode of the coil in the software is enriched.
Owner:LANZHOU UNIV
Half-sandwich rhodium building unit-based six-nuclear triangular prism compound as well as preparation method and application thereof
PendingCN119409983AEasy transitionOther chemical processesAdsorption purification/separationChemical synthesisRhodium Metallicum
The invention provides a six-core triangular prism compound based on a half-sandwich rhodium building unit as well as a preparation method and application of the six-core triangular prism compound, and belongs to the technical field of chemical synthesis. The six-core triangular prism compound based on the half-sandwich rhodium construction unit provided by the invention contains six rhodium, characterization is performed through single crystal X-ray diffraction, and a single crystal structure shows that the compound based on the half-sandwich rhodium construction unit provided by the invention shows a six-core triangular prism configuration; the distance between the long sides of the metal rhodium is # imgabs 0 #, the distance between the short sides of the metal rhodium is # imgabs 1 #, and the distance between the centers of the metal rhodium is # imgabs 2 #. Nuclear magnetic analysis and crystal structure analysis on the six-core triangular prism compound prove that the compound is of a six-core triangular prism structure in both a liquid phase and a solid phase; and potential application prospects can be realized in the fields of molecular recognition, separation and photo-thermal.
Owner:LUOYANG NORMAL UNIV
Outdoor electric energy metering box monitoring system and method based on intelligent sensor
The invention relates to the technical field of electric energy metering boxes, and discloses an outdoor electric energy metering box monitoring system and method based on an intelligent sensor. A magnetic variable detection module; the electromagnetic analysis module is configured to judge whether the to-be-monitored electric energy metering box has an abnormal power utilization behavior or not based on a correlation calculation result between the electric variable change trend and the magnetic variable change trend; the abnormal type determination module is configured to determine the abnormal type of the abnormal power consumption behavior based on the trend deviation degree; the abnormal alarm value determining module is configured to determine an abnormal alarm value based on the abnormal type and the historical electromagnetic variable time sequence; and the alarm module is configured to determine the alarm level of the abnormal power consumption behavior based on the abnormal alarm value and give an alarm in real time. According to the invention, through cooperative work of multiple modules, the outdoor electric energy metering box can be comprehensively and accurately monitored.
Owner:JIANGJIANG ELECTRIC CO LTD
A method to enhance SmFe 12 Methods for improving the magnetic properties of sintered permanent magnet materials
PendingCN122136161AMagnetic materialsInductances/transformers/magnets manufactureMischmetalHigh energy
This invention discloses a method for improving SmFe 12 A method for determining the magnetic properties of sintered permanent magnet materials. The method includes: using a low-melting-point rare-earth-rich alloy sheet as a diffusion source to conduct magnetic analysis on SmFe2... 12 The sintered permanent magnet material is sandwiched and heat-treated to achieve SmFe 12 The magnetic properties of sintered permanent magnet materials are improved; wherein the low-melting-point rare-earth-rich metal sheet includes Sm sheet and / or Sm alloy sheet. The modified SmFe prepared by this invention... 12 Sintered permanent magnet materials exhibit continuous grain boundary phases, high coercivity, and high energy product. Room temperature coercivity can be increased by 2000–8000 Oe. This method is simple and effective, and is applicable to SmFe... 12 This provides a new approach to improving the overall magnetic properties of sintered permanent magnet materials.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
Optimization selection method of high temperature superconducting dc cable
The application relates to an optimization selection method of a high-temperature superconducting direct-current cable, which records the change of a magnetic field under different winding angles in three-dimensional simulation by establishing an accurate three-dimensional superconducting cable model through COMSOL, records the change of the magnetic field of a superimposed different harmonic component current strip, and decomposes the magnetic induction intensity in parallel and vertical directions, so that the average value of the magnetic induction intensity under different conditions is compared with the unit value and the reference value, three-dimensional cable electromagnetic analysis under different conditions is carried out on the cable under different conditions, and the analysis speed and accuracy of the cable are effectively improved. Meanwhile, the application analyzes an anisotropy influencing factor, provides a basis for winding of superconducting strips, and explores the application value of the high-temperature superconducting direct-current cable.
Owner:STATE GRID TIANJIN ELECTRIC POWER COMPANY +1
Ship double-station RCS calculation method, device and equipment and storage medium
ActiveCN120804471AWave based measurement systemsComplex mathematical operationsDielectricMarine engineering
The invention relates to the technical field of electromagnetic analysis, and discloses a ship double-station RCS calculation method, device and equipment and a storage medium, and the method comprises the steps: calculating a dielectric constant based on ship material parameters and sea surface physical parameters; based on the spatial position coordinates of the transmitter and the receiver, the propagation direction unit vectors of the incident wave and the received wave are calculated; the incident field amplitude is calculated based on the incident wave propagation direction unit vector; reflection analysis is carried out based on the ship-sea reflection path, a ship-sea path reflection vector function is obtained, and a ship-sea path reflection field amplitude is obtained through calculation in combination with a received wave propagation direction unit vector; calculating first station RCS data based on the incident field amplitude and the ship-sea path reflection field amplitude; replacing the ship-sea reflection path with a ship reflection path, and calculating to obtain second station RCS data; according to the method, the ship reflection path and the ship-sea reflection path are subjected to reflection analysis, so that more accurate RCS calculation is realized, and support is provided for ship detection in a complex ocean scene.
Owner:JIHUA LAB
A ship electromagnetic environment modeling method, device, equipment and storage medium
The present application relates to the technical field of electromagnetic analysis, and discloses a ship electromagnetic environment modeling method, device and equipment and a storage medium, which comprises the following steps: performing topology structure analysis on a ship space, identifying the positions of interference sources and to-be-protected equipment, and constructing a ship electromagnetic interference prediction model; performing electromagnetic interference distribution analysis on the ship to obtain interference distribution information; calculating the total interference intensity of each measurement point based on the interference distribution information; obtaining the actual measured interference intensity of each measurement point, and comparing and verifying the total interference intensity to obtain the verification result of each measurement point; if the verification results of all measurement points are passed, iteratively optimizing the ship electromagnetic interference prediction model based on the difference between the total interference intensity of each measurement point and a preset electromagnetic interference tolerance limit value to obtain an optimized model; the present application improves the description ability of the model for the complex electromagnetic environment of the ship, and thus improves the accuracy of the ship electromagnetic compatibility design.
Owner:JIHUA LAB
Stern-Gerlach magnetic analysis method
This application relates to a Stern-Glach magnetic analysis method. The method includes: constructing a particle beam to be tested; the particle beam being atoms or molecules with bound electrons; generating a non-uniform magnetic field along the path of the particle beam, and synchronizing the arrival time of the particle beam to the non-uniform magnetic field with the generation time of the non-uniform magnetic field so that the particle beam is subjected to a pulse of the non-uniform magnetic field when passing through it; the pulse width of the non-uniform magnetic field is set based on the orbital period of the electrons in the particle beam; obtaining the landing position of the particle beam after passing through the non-uniform magnetic field; and obtaining statistical information on the instantaneous magnetic moment of the particle beam based on the landing position. This method can detect the instantaneous magnetic moment of a particle beam.
Owner:MESOSCOPIC FIELD WAVE TECHNOLOGY (JIANGXI) CO LTD
Catalytic material in-situ adsorption / desorption analysis system and method based on nuclear magnetic resonance analysis characterization
PendingCN121164351AAnalysis using nuclear magnetic resonanceTemperature controlNMR - Nuclear magnetic resonance
The invention discloses a catalytic material in-situ adsorption / desorption analysis system and method based on nuclear magnetic resonance analysis characterization, and relates to the technical field of instrument preparation and in-situ analysis. Comprising a catalytic material sample batch processing device, a water-free and oxygen-free sample transfer device and an in-situ solid nuclear magnetic analysis device. According to the invention, a multi-channel parallel batch parallel processing mode is adopted, so that the sample processing and analysis efficiency is effectively improved, and accurate temperature control and vacuum degree control are realized.
Owner:INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES
Permanent magnet synchronous motor heterogeneous grid adaptive high-precision magnetic network modeling method
The invention relates to a permanent magnet synchronous motor heterogeneous grid adaptive high-precision magnetic network modeling method, and belongs to the technical field of permanent magnet synchronous motor electromagnetic analysis. The method comprises the following steps: extracting a single-slot or single-pole minimum periodic unit of a motor structure, carrying out symmetric fan-shaped grid division, accurately representing the boundary of a heterogeneous material by utilizing a polar coordinate function, and calculating magnetic conductance based on a geometric overlapping principle; the permanent magnet and the stator winding magnetomotive force are fused through unified matrix modeling, and the stability of nonlinear solution is improved in combination with a Newton-Raphson iterative algorithm. According to the method, the modeling process is simplified, the preprocessing time and the calculation time are greatly shortened compared with those of a finite element method, and the efficiency of multi-working-condition iterative optimization is remarkably improved on the premise that high precision is guaranteed.
Owner:HEBEI UNIV OF TECH
A method and system for two-dimensional magnetic field analysis of a multi-layer cylindrical magnetic shielding structure
The application discloses a kind of two-dimensional magnetic field analysis method and system of multilayer cylinder magnetic shielding structure, belong to electromagnetic analysis technical field.The method includes: establishing multilayer cylindrical two-dimensional analytical model, the magnetic field distribution expression of each air domain and magnetic shielding layer is determined;The continuity constraint condition at the inner and outer boundary of magnetic shielding layer is solved, the expression of corresponding reflection coefficient and transmission coefficient is obtained, and it is simplified, and the expression only including shielding layer radius and relative magnetic permeability is obtained;Based on the cumulative influence of incident harmonic amplitude in the transmission process of adjacent two layers of magnetic shielding layer, transmission coefficient is obtained;According to reflection coefficient, transmission coefficient and transmission coefficient, the magnetic vector potential component expression of each air domain is determined, the corresponding magnetic field distribution result is obtained, and magnetic field analysis is carried out.The magnetic vector potential component expression of each air domain of magnetic shielding structure is directly written by self-defined parameter, and the complexity of multilayer structure solving process is reduced.
Owner:HUAZHONG UNIV OF SCI & TECH
A demagnetization fault detection method and system for a permanent magnet synchronous all-in-one machine
The present invention discloses a demagnetization fault detection method and system for a permanent magnet synchronous all-in-one machine, which relates to the technical field of demagnetization fault detection, including: collecting historical operating data of the permanent magnet synchronous all-in-one machine and extracting overload operating data from the operating data; performing demagnetization prediction of the permanent magnet synchronous all-in-one machine based on the overload operating data to obtain demagnetization probability information and demagnetization amplitude information; setting the number of demagnetization tests for the permanent magnet synchronous all-in-one machine based on the demagnetization probability information and the demagnetization amplitude information, performing demagnetization tests on the permanent magnet synchronous all-in-one machine according to the number of demagnetization tests, and obtaining a set of demagnetization test results; performing demagnetization analysis and calculation based on the set of demagnetization test results to obtain a comprehensive demagnetization amplitude and demagnetization uniformity information as a demagnetization fault detection result. The present invention solves the technical problem of low demagnetization fault detection accuracy in the prior art, and achieves the technical effect of improving the accuracy of demagnetization fault detection.
Owner:HUA TIANXIN INTELLIGENT IOT CO LTD
Determination of the contents of four alkaloids in Uncaria rhynchophylla
The present invention belongs to the technical field of drug analysis, and discloses a method for determining the content of four alkaloids in Uncaria rhynchophylla. The determination method comprises the following steps: (1) preparing a test solution of total alkaloids of Uncaria rhynchophylla; (2) adding an internal standard to the test solution of total alkaloids of Uncaria rhynchophylla prepared in step (1), and then loading it into a nuclear magnetic resonance tube, performing a quantitative nuclear magnetic resonance hydrogen spectrum test, and integrating the selected signals of the internal standard and the four alkaloids respectively; (3) calculating using a formula, and respectively obtaining the content of the four alkaloids in the total alkaloids of Uncaria rhynchophylla. The present invention adopts a quantitative hydrogen nuclear magnetic resonance analysis technology to determine the content of the four alkaloids in Uncaria rhynchophylla, does not need to prepare a working curve with a standard reference substance, and can use a known common chemical substance as a reference, which can greatly save the test cost; and the sample test pretreatment is simple, the test time is short, and the measurement result has good linearity, sensitivity, precision and accuracy.
Owner:MACAU UNIV OF SCI & TECH
Accelerator mass spectrometer system taking speed selector as analyzer
InactiveCN120236990AElectron/ion optical arrangementsMaterial analysis by electric/magnetic meansMass analyzerParticle physics
The invention relates to the technical field of mass spectrometers and accelerator mass spectrometers, in particular to an accelerator mass spectrometer system taking a speed selector as an analyzer, which comprises a sample injector, an ion source, an accelerator, a magnetic analyzer, an absorption film, a speed selector and a detector, in order to miniaturize and simplify an accelerator mass spectrum, the accelerator mass spectrometer system based on the speed selector is provided for the first time, namely, the speed selector is used for replacing an electrostatic analyser 2 and a magnetic analyser 2 at the high-energy end of an accelerator mass spectrometer; therefore, on the premise of ensuring various technical indexes of the accelerator mass spectrometer, the size of the system is reduced, the cost of the instrument is also reduced, and one speed selector is equivalent to the integration of one electrostatic analyzer and one magnetic analyzer.
Owner:QIXIAN PHARMACEUTICAL TEST (XIONGAN) TECHNOLOGY CO LTD
Magnetic analysis of extracellular vesicle glycans
Devices and methods for analysing extracellular vesicle glycans are described. According to an embodiment, a microfluidic device comprises an inlet portion configured to receive a fluid sample; a mixing portion fluidically coupled to the inlet portion and configured to facilitate mixing between the fluid sample and magnetic nanoparticles functionalized to bind with extracellular vesicles and aggregate to vesicle glycans in the fluid sample; a magnetic separation portion fluidically coupled to the mixing portion and configured to separate clusters of magnetic nanoparticles from the fluid sample; and a magnetic sensor configured to measure magnetic properties of the fluid sample after it has passed through the magnetic separation portion. The magnetic nanoparticles may configured to aggregate in the presence of respective lectins when bound with extracellular vesicles carrying target glycans. In a specific embodiment, the magnetic particles comprise a magnetic polycore coated with polydopamine.
Owner:NATIONAL UNIVERSITY OF SINGAPORE
A method for purifying digitoxin and determining its purity
ActiveCN120009448BComponent separationAnalysis using nuclear magnetic resonanceSolventNuclear chemistry
The present invention provides a method for purifying digitoxin and determining its purity. Using the pure digitoxin obtained by separation and purification with supercritical fluid chromatography technology as a control, the purity of the crude digitoxin is determined by chromatography and nuclear magnetic resonance spectroscopy. The present invention uses supercritical fluid chromatography as a pretreatment means for quantitative nuclear magnetic analysis, reducing the consumption of a large amount of solvents, shortening the sample pretreatment time, avoiding interference with the measurement results such as sample degradation, and improving the efficiency and measurement accuracy of digitoxin purity determination. The present invention provides a reliable and convenient detection method for the organic purity measurement of digitoxin, and has important value in the fields of drug production, quality control and organic chemical purity analysis.
Owner:NATIONAL INSTITUTE OF METROLOGY CHINA
Method for evaluating in-situ modified reservoir properties of low to medium mature shale oil
ActiveCN120028365BMaterial analysis using wave/particle radiationEarth material testingThermodynamicsUnconventional oil
The present application belongs to the technical field of unconventional oil and gas resource development, and specifically discloses a method for evaluating in-situ modification reservoir properties of middle-low mature shale oil, which comprises the following steps: sample selection, diagenetic simulation, thermal simulation sample porosity test, quantitative identification of thermal simulation sample nuclear magnetic analysis pore structure and thermal simulation sample fracture development, final determination of in-situ conversion optimal heating temperature and heating rate parameters, evaluation of shale reservoir in-situ modification effect, and establishment of a quantitative evaluation scheme for reservoir in-situ modification. The method for evaluating in-situ modification reservoir properties of middle-low mature shale oil is fully combined with advanced current testing and in-situ characterization technology, solves the problem of in-situ observation in the evaluation of in-situ conversion shale reservoir of middle-low mature shale oil, effectively solves the problem of non-visualization of the physical process of thermal simulation experiment, realizes the visualized observation of in-situ, and has the advantages of rapidness, non-damage, sensitivity and the like compared with the traditional testing method.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Modeling method for magnetic network model of self-starting permanent magnet synchronous motor
PendingCN120850635ADesign optimisation/simulationSpecial data processing applicationsElectric machinePermanent magnet synchronous motor
The invention provides an improved permanent magnet synchronous motor magnetic network modeling method, relates to the field of electromagnetic calculation of motors, and is suitable for design and calculation of electromagnetic characteristics of a self-starting permanent magnet synchronous motor. According to the structural characteristics and magnetic distribution of the permanent magnet synchronous motor, a magnetic network model of a stator, a rotor and an air gap is built, and rotor conducting bar magnetic leakage, a rotor conducting bar skin effect and non-uniform saturation of a magnetic bridge area between a rotor starting cage and a permanent magnet in the starting process and under a steady-state working condition are mainly considered; the invention provides a modeling method for a rotor conducting bar area and a magnetic bridge area, so that the magnetic flux of the rotor conducting bar area and the magnetic bridge area can be uniformly distributed in a unit, the local magnetic resistance is effectively reduced, and the magnetic passing degree concentration is avoided. By means of the method, electromagnetic analysis under the steady-state working condition can be conducted, the electromagnetic performance in the starting process can be analyzed according to the characteristic that the motor requires the large starting torque, the electromagnetic performance of the motor under different working conditions is analyzed more accurately, and therefore design and calculation of the electromagnetic performance of the motor are better conducted.
Owner:HARBIN UNIV OF SCI & TECH
Robot magnetic attraction recovery system based on space positioning
The invention discloses a robot magnetic suction recovery system based on spatial positioning, and relates to the technical field of recovery, which comprises an information acquisition module, a magnetic suction recovery base space construction module, a recovery path analysis module, a diamagnetic analysis module, a magnetic force control module and a part replacement analysis module, the system has the advantages that the system is helped to obtain more accurate working environment information through the space construction module, a more reliable space cognition basis is provided for the recovery operation of the robot, the magnetic force can be optimized in real time according to the position of the robot through the magnetic force management and control module, the robot is attracted properly in the recovery process, and the recovery efficiency of the robot is improved. Smooth recovery can be guaranteed, the problem of recovery failure or part damage caused by too large or too small magnetic force can be avoided, the characteristics of new parts can be rapidly adapted through the part replacement analysis module after robot parts are replaced, and the stability and effectiveness of the whole recovery system are guaranteed.
Owner:陈元
Method, device, equipment and medium for predicting imbibition utilization efficiency of stratified shale oil
PendingCN121994851AWithdrawing sample devicesPreparing sample for investigationThermodynamicsLaboratory test
The invention relates to the technical field of unconventional shale oil and gas reservoir exploration, in particular to a method, a device, equipment and a medium for predicting the imbibition utilization efficiency of stratified shale oil. According to the method, the imbibition utilization efficiency of the stratified shale oil can be quickly predicted, and an effective means is provided for revealing an interaction reaction mechanism of shale reservoir rock and an injected medium, a shale reservoir rock imbibition oil extraction mechanism, a shale reservoir recovery efficiency improving mechanism and the like. According to the present invention, the imbibition oil discharge indoor test under the oil reservoir temperature and pressure condition is combined with the two-dimensional nuclear magnetic analysis, and the use conditions of the crude oil in different aperture spaces are distinguished according to the two-dimensional nuclear magnetic T1 and T2 spectrograms of the nuclear magnetic diagnosis, such that the respective imbibition oil discharge efficiency functions and the overall critical use lower limit of different aperture intervals are established so as to be adopted as the data volume model; the method for rapidly predicting the imbibition utilization efficiency of the stratified shale oil by using the two-dimensional nuclear magnetic technology under the conditions of rapidness, accuracy and no damage to the rock core is provided.
Owner:PETROCHINA CO LTD
Weak magnetic analyzer one-to-four cable
ActiveCN222483925Uachieve stabilitySimple structureFlexible lead accommodationMechanical engineeringPhysics
Owner:HANGZHOU LTTECH
Small double-focusing mass spectrum imaging system for space and use method
The invention relates to the technical field of instruments and meters, in particular to a small-sized double-focusing mass spectrum imaging system for space and a use method, the system comprises an ion source, a coding plate, an electrostatic analyzer, a magnetic analyzer and an FOP detector, the ion source adopts a symmetrical magnetic field structure, and a cathode emission device and a hot filament are respectively located at two ends of the ion source; the coding plate is arranged right in front of the ion source; the electrostatic analyzer is composed of two coaxial cylindrical electrodes; the magnetic field structure of the magnetic analyzer is a direct asymmetric fan-shaped magnetic field; the electrostatic analyzer and the magnetic analyzer are combined in a reverse serial connection manner; the FOP detector adopts a micro-channel plate + fluorescent screen + CMOS camera imaging mode. According to the invention, the limitation of large sizes of ion beams and imaging light spots thereof under a conventional single-slit outlet structure of a mass spectrometer is overcome by adopting a coding aperture mode, so that the mass resolution of the mass spectrum imaging device is remarkably improved, the sensitivity is high, the imaging speed is high, the signal-to-noise ratio is high, and the detection of lower-content substances is realized.
Owner:LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
Hidden skarn type magnetite positioning method, device and equipment and storage medium
PendingCN120315063AGravitational wave measurementElectric/magnetic detectionComputational scienceMagnetite
The invention discloses a hidden skarn type magnetite positioning method, device and equipment and a storage medium. The method comprises the following steps: determining first gravity abnormal data of a rock gravity field in a target area and first magnetic force abnormal data of a rock magnetic force field in the target area; analyzing and processing the first gravity abnormal data and the first magnetic force abnormal data, and determining a first horizontal contour coil delineated and horizontally closed by the magnetite body in the target area and first intrusive rock mass information of the magnetite body intruding rock; and vertically projecting the first horizontal contour coil to the first intrusive rock mass information, and determining iron ore three-dimensional information of the hidden skarn magnetite in the target area. According to the method, three-dimensional positioning of the magnetite can be predicted without a large amount of drilling through gravity-magnetic collaborative analysis, and an efficient method is provided for concealed skarn type magnetite exploration.
Owner:CHINA AERO GEOPHYSICAL SURVEY & REMOTE SENSING CENT FOR LAND & RESOURCES
A method for nuclear magnetic-resistivity combined measurement of fluid occurrence and migration in a core
ActiveCN119715650BSurface/boundary effectAnalysis using nuclear magnetic resonanceNMR - Nuclear magnetic resonanceFluid migration
The application provides a method for nuclear magnetic-resistivity combined measurement of fluid occurrence and migration in a core, which comprises the following steps: drying the core and cooling it to room temperature; applying a specified confining pressure to the core and keeping it constant; measuring the background resistivity distribution of the core and closing the resistivity analyzer; opening the liquid pump and the liquid inlet valve, and stopping the pumping when the liquid surface is flush with the upper surface of the sponge; performing nuclear magnetic resonance imaging on the core, dividing it into multiple observation sections in the longitudinal direction, and ensuring that at least one observation section is formed in the place where the conductivity probe is located; closing the nuclear magnetic analysis system and the nuclear magnetic resonance imaging system, and measuring the resistivity of the core; alternately performing nuclear magnetic measurement and resistivity measurement; calculating the fluid migration law in the spontaneous imbibition process to simulate the well soaking process; and calculating the fluid migration law in the gas drive process to realize the nuclear magnetic-resistivity combined measurement of fluid occurrence and migration. The method can effectively avoid the interference of magnetic polarization on the resistivity test during the nuclear magnetic measurement process, and has high measurement accuracy.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Magnetic spectrometer for measuring gamma ray energy-time combined spectrum and implementation method
The invention discloses a magnetic spectrometer for measuring a gamma ray energy-time combined spectrum and an implementation method, and relates to the field of gamma ray energy spectrum measurement. The system comprises a gamma-e conversion target and an electron beam limiting device which are arranged in a first vacuum chamber, a magnetic analyzer system arranged in a second vacuum chamber, and a scintillation optical fiber detector system, the magnetic analyzer system comprises a heterogeneous deflection magnet and a special-shaped vacuum box arranged in a magnetic gap of the heterogeneous deflection magnet; the longitudinal section of an exit port of the heterogeneous deflection magnet is arranged to be parabola-shaped; the scintillation optical fiber detector system comprises a scintillation optical fiber array used for receiving charged particle beams emitted from the heterogeneous deflection magnets, a photoelectric receiving unit used for receiving photons emitted by the scintillation optical fiber array, and a high-speed data acquisition device used for recording output waveforms. Gamma-ray energy spectrum information and time spectrum information which are wide in energy range and high in resolution can be obtained while the equipment is light in weight.
Owner:NORTHWEST INST OF NUCLEAR TECH
Method for analyzing coking coal type through residual carbon structure
PendingCN120142355APreparing sample for investigationAnalysis using nuclear magnetic resonanceCombustionResidual carbon
The invention relates to a method for analyzing coking coal types through residual carbon structures, and the method specifically comprises the following steps: heating a sample at 700 + / -10 DEG C, carrying out solid-state nuclear magnetic analysis after combustion, and carrying out peak-dividing fitting on a 13C NMR spectrogram of the sample by using Origin software; the types of carbon are divided into saturated carbon and unsaturated carbon, and the ratio R of the saturated carbon to the unsaturated carbon is equal to Y / X; when the value of R is 1 + / -0.2 and R is greater than 1, determining that the coal type is coking coal, and when R is less than 1, determining that the coal type is fat coal; when the value of R is 0.5 + / -0.2 and R is greater than 0.5, determining that the coal type is lean coking coal; and when R is less than 0.5, determining that the coal type is 1 / 3 coking coal. Aiming at the difficulty of coal type classification, the rapid classification of coal types is carried out according to the quantity ratio of saturated carbon to unsaturated carbon by utilizing the solid nuclear magnetic representation of substances after coal pyrolysis, particularly residual carbon structures.
Owner:ANSTEEL BEIJING RES INST CO LTD +1
A method for analyzing magnetic bias of a full-bridge converter
ActiveCN116500517BEfficient power electronics conversionCurrent/voltage measurementCapacitanceFull bridge
The application discloses a full-bridge converter magnetic bias analysis method, comprising the following steps: converting the voltage of the input side capacitor of the full-bridge converter into a pulse voltage through the switching network of the full-bridge converter; injecting the pulse voltage into the resonant inductance of the full-bridge converter; measuring the voltage signal and the current signal of the resonant inductance; and analyzing the measured voltage signal and current signal to realize the direct current magnetic bias analysis of the full-bridge converter. The application injects the alternating voltage with positive and negative conversion into the resonant inductance to obtain the voltage and current waveforms, analyzes the voltage deviation of the positive and negative half cycles, obtains the reason for the magnetic bias of the full-bridge direct current converter, provides the basis for the design and selection of the resonant inductance, and effectively improves the reliability of the system.
Owner:SHANGHAI INST OF SPACE POWER SOURCES
Method for purifying digitonin and determining purity of digitonin
ActiveCN120009448AComponent separationAnalysis using nuclear magnetic resonancePretreatment methodNuclear chemistry
The invention provides a digitonin purification and purity determination method. A pure digitonin product obtained through separation and purification by adopting a supercritical fluid chromatography technology is used as a contrast, and the purity of the crude digitonin product is measured by utilizing chromatography and nuclear magnetic resonance spectroscopy. According to the method, the supercritical fluid chromatography is adopted as a pretreatment means for quantitative nuclear magnetic analysis, so that the consumption of a large amount of solvent is reduced, the sample pretreatment time is shortened, the interference of sample degradation and the like on a measurement result is avoided, and the purity measurement efficiency and the measurement accuracy of digitonin can be improved. The invention provides a reliable and convenient detection method for measuring the organic purity of digitonin, and has important value in the fields of medicine production, quality control and organic chemical purity analysis.
Owner:NATIONAL INSTITUTE OF METROLOGY CHINA