64 results about "Magnetic susceptibility" patented technology

The invention discloses a slope monitoring method and system based on an unmanned aerial vehicle, and relates to the technical field of intelligent geological disaster monitoring, and the method comprises the steps: carrying a magnetic gradient measurement unit and a laser radar through the unmanned aerial vehicle, and collecting magnetic gradient tensor collection and slope surface point cloud from multiple heights and multiple routes; on the basis of a gradient adaptive weighted total variation inversion method, slope gradient information extracted by a digital elevation model is introduced into regularization weight adjustment, so that an inversion result can be adaptively adjusted in different gradient areas; based on a magnetic susceptibility distribution model, a magnetic construction adaptive clustering and risk index calculation method is used, and through amplitude density index and gradient constraint search, clustering identification and risk quantitative partitioning of a high-gradient accumulation area are carried out. Therefore, expansion from surface slope deformation monitoring to deep concealed structure detection is realized, and concealed slip zones or fissure zones can be accurately revealed under complex terrain conditions.

A method for evaluating geological hydrogen source rock in a region is provided. The method includes: collecting magnetic susceptibility data from a plurality of subsurface locations in the region; receiving geophysical survey data of the region, wherein the geophysical survey data comprises geophysical data collected from above ground; tying the magnetic susceptibility data of the plurality of subsurface locations to the geophysical survey data; generating a geologic map of igneous rock, metamorphic rock, or mafic mineral- or iron-rich sedimentary rock within the region based on the magnetic susceptibility data using a model; and determining, based on the geologic map, a target zone of the geological hydrogen source rock with a potential for hydrogen production or with the potential for hydrogen accumulation.

The invention relates to the technical field of iron ore detection, and discloses a deep coverage area skarn type iron-rich ore target detection method based on gravity and magnetic data. The method comprises the steps of collecting and preprocessing gravity and magnetic measurement data of a target area to obtain a standardized gravity and magnetic data set; based on the geological background of the analysis area, the structure and lithology distribution characteristics are extracted, and the metallogenic conditions are matched to screen the potential metallogenic target area. And performing multi-scale decomposition on the gravity and magnetic data of the target region, obtaining different depth level abnormal features, constructing a three-dimensional geologic structure model, and obtaining density and magnetic susceptibility distribution based on model inversion. Accordingly, the ore body is recognized, spatial distribution features are extracted, continuity and scale of the ore body are determined through spatial correlation analysis, and a final prediction result is output after geological constraint condition optimization is combined. The method is suitable for a complex environment with signal shielding and abnormal superposition in a deep coverage area, deep ore body information can be accurately captured, and a feasible path is provided for skarn type rich iron ore detection.

The fusion adaptive dynamic prior information magnetotelluric and magnetic method joint inversion method belongs to the field of geophysical data processing and inversion technology; by constructing a joint inversion objective function including data fitting term, model constraint term and physical coupling term, and using Gauss-Newton method for solving, the core innovation lies in introducing adaptive dynamic prior information extraction technology; the method can automatically generate and optimize prior constraints from data itself and intermediate results, without relying on external preset information, thereby significantly improving the accuracy and reliability of the boundary description and physical property recovery of underground abnormal bodies (such as resistivity, magnetic susceptibility anomaly); solve the problem that the traditional physical property coupling joint inversion technology has strong dependence on prior information and weak application generalization ability in information missing area.

The application discloses a kind of low field intensity magnetic susceptibility weighted imaging optimization method and system, it is related to magnetic susceptibility weighted imaging field, comprising: obtaining the K space original data obtained by scanning target object;According to K space original data reconstruction image field data, extract the amplitude data and phase data of image field data;Phase data is preliminary unwrapping processing, and unwrapping phase data is obtained;Unwrapping phase data is separated from background field, and local phase diagram is obtained;Local phase diagram and amplitude data are operated based on complex domain phase separation high-pass filter, and high-frequency phase data is obtained;According to high-frequency phase data and amplitude data, the reconstruction of magnetic susceptibility weighted image is carried out, and the magnetic susceptibility weighted image of target object is obtained.The application can significantly reduce the phase artifact of SWI image, and improve the definition of image detail.

The invention discloses a method for calculating a quantitative magnetic susceptibility image through total field inversion based on a Green function. The method is used for separating a background magnetic field and reconstructing a whole-brain quantitative magnetic susceptibility image in magnetic resonance imaging. According to the boundary element method full-field inversion method, filtering and regularization processing on tissue magnetic susceptibility are prevented from being additionally introduced when background field interference is removed, the background field can be effectively separated, a whole-brain quantitative magnetic susceptibility image can be reconstructed, the boundary erosion phenomenon cannot occur, and the boundary element method full-field inversion method particularly shows excellent performance in a cortex area. According to the method, a fast multipole method is adopted to efficiently process storage and calculation of a dense matrix generated by a boundary integral equation.

This invention discloses a three-dimensional modeling and visualization method based on gravity and magnetic data, relating to the field of geophysical exploration technology. The method includes the following steps: performing multi-scale decomposition processing on gravity and magnetic anomaly data to weaken the volume field superposition effect; constructing a three-dimensional grid model of the study area based on the spatial distribution of surface observation data, using the density and magnetic susceptibility of each grid cell as model variables to be inverted, and reducing the impact of superposition effect on subsurface exploration modeling through multiple gravity and magnetic field components with different depth sensitivities, providing high-quality input for the constructed three-dimensional grid model; then inverting the three-dimensional grid model, and introducing differentiated weight constraints during the inversion process to improve the resolution and stability of the subsurface physical property distribution inversion, and enhance the accuracy of inferring subsurface geological properties.

The fusion adaptive dynamic prior information magnetotelluric and magnetic method joint inversion method belongs to the field of geophysical data processing and inversion technology; by constructing a joint inversion objective function including data fitting term, model constraint term and physical property coupling term, and using Gauss-Newton method for solving, the core innovation lies in introducing adaptive dynamic prior information extraction technology; the method can automatically generate and optimize prior constraints from data itself and intermediate results, without relying on external preset information, thereby significantly improving the accuracy and reliability of the boundary description and physical property recovery of underground abnormal bodies (such as resistivity, magnetic susceptibility anomaly); solve the problem that the traditional physical property coupling joint inversion technology has strong dependence on prior information and weak generalization ability in information missing area.

The invention discloses a skarn deep mineralized zone positioning method, which comprises the steps of generating a contact zone working area and a unique grid reference based on a contact zone geological boundary, a structure line and a common coverage range; based on the hyperspectral data, generating an oxidation thickness map and a demagnetization clue initial map; based on the oxidation thickness map and the demagnetization clue initial map, introducing a physical constraint of near-surface demagnetization caused by strong oxidation, and outputting a demagnetization risk map; constructing a depth bias function according to the demagnetization risk map, and generating joint inversion configuration; carrying out gravity-magnetic joint inversion according to the joint inversion configuration, outputting a density body and a magnetic susceptibility body, and carrying out pairing marking; the continuity of the deep preferential mineralization zone is checked, consistency verification is carried out, and preferential zone labels and low-priority zone labels are output; and the pairing marks, the priority belt marks and the low-priority belt marks are overlapped to form a hole arrangement reference graph, and suggested drilling positions and depth intervals are given in a contact belt working area. According to the scheme, the skarn mineralization zone can be stably positioned, and hole arrangement deployment can be served.

A method for evaluating geological hydrogen source rock in a region is provided. The method includes: collecting magnetic susceptibility data from a plurality of subsurface locations in the region; receiving geophysical survey data of the region, wherein the geophysical survey data comprises geophysical data collected from above ground; tying the magnetic susceptibility data of the plurality of subsurface locations to the geophysical survey data; generating a geologic map of igneous rock, metamorphic rock, or mafic mineral-or iron-rich sedimentary rock within the region based on the magnetic susceptibility data using a model; and determining, based on the geologic map, a target zone of the geological hydrogen source rock with a potential for hydrogen production or with the potential for hydrogen accumulation.

The invention discloses an active source magnetic susceptibility imaging method for buried object detection in emergency search and rescue. Comprising the following steps: 1) electrifying an exciting coil to generate a strong magnetic field, magnetizing underground metal in a detection area to generate a secondary induced magnetic field, controlling attenuation of the secondary induced magnetic field, changing magnetic flux in a pair of receiving coils along with the attenuation of the secondary induced magnetic field, and respectively generating induced electromotive force; acquiring the difference between the induced electromotive forces of one pair of receiving coils as data; 2) after a plurality of groups of electromotive force difference data are obtained, realizing inversion imaging of three-dimensional magnetic susceptibility by solving a target function, and accurately positioning an area of a buried person or a key object; the magnetic signals can effectively penetrate through the blindage in the mode that the electrified coil actively excites the magnetic field, the magnetic signals serve as targets, the shielding effect of the complex blindage environment on other signals is avoided, and it is ensured that search and rescue have high sensitivity and resolution by means of the large magnetic susceptibility difference between the sediment or water flow blindage and the target to be searched and rescued.

The invention provides an electric field auxiliary high-voltage oil displacement monitoring device and method compatible with nuclear magnetic resonance imaging, and relates to the technical field of oil and gas exploitation monitoring. The device comprises a high-voltage clamp holder main body, a magnetic susceptibility matching electrode system and an electromagnetic compatibility filter network; the method comprises the steps of loading a rock core, collecting a baseline, performing conventional displacement to obtain a first image, applying an electric field to obtain a second image, and performing contrastive analysis to obtain an electric field utilization condition. Through electrode magnetic susceptibility matching, a hydrogen-free insulating medium and bidirectional filtering isolation, the problem of imaging interference under coexistence of a strong electric field and a strong magnetic field is solved, and high-definition in-situ monitoring of the electric field assisted oil displacement process and quantitative analysis of the remaining oil utilization degree are achieved.

The application belongs to the technical field of geophysical magnetic exploration, and specifically discloses a method and device for reconstructing crust temperature distribution based on magnetic anomaly, which comprises the following steps: obtaining a magnetic susceptibility-temperature curve based on rock physical experiments, combining a preset temperature-depth relationship to construct a depth-dependent magnetic susceptibility function, and taking the depth-dependent magnetic susceptibility function as a magnetic susceptibility structure constraint for magnetic anomaly forward modeling and inversion; inputting magnetic anomaly grid data and the depth-dependent magnetic susceptibility function into a spatial domain forward modeling and inversion framework established based on a Cauchy-type curved area integral, constructing a target functional, iteratively solving by using a reweighted regularization conjugate gradient algorithm, and obtaining an equivalent intracrust depth distribution; taking the equivalent intracrust depth distribution as a first isothermic surface, combining a surface boundary temperature and a temperature boundary taking the Moho as a second isothermic surface, reconstructing a regional three-dimensional crust temperature structure, and outputting a temperature distribution result. The application can improve the calculation efficiency of intracrust inversion and the geological reliability of the result.

The present invention provides an apparatus (10j) and method for separating different chemical species from each other when they are suspended or entrained in liquid metal as solid particles. The apparatus (10j) comprises a vessel (2) for containing liquid metal. The vessel (2) is continuously axially symmetric about a longitudinal axis (Z), and at least part of it tapers to an apex. The vessel (2) comprises an inlet (4) for the liquid metal having suspended or entrained therein, particles of a plurality of different chemical species of respectively different densities each in solid phase, an underflow outlet (5) for the liquid metal with a majority of particles of a first, denser one of the plurality of different chemical species suspended or entrained therein, and an overflow outlet (6) for the liquid metal with a majority of particles of a second, less dense one of the plurality of different chemical species suspended or entrained therein. The underflow outlet (5) is nearer to the apex of the vessel (2) than the overflow outlet (6). The apparatus (10j) also comprises a first electrode (12) coaxial with the longitudinal axis (Z) of the vessel (2), one or more second electrodes (14) spaced apart from the first electrode (12), and a source (17) of a magnetic field. The first and one or more second electrodes (12, 14) each have a magnetic susceptibility with an absolute value of less than 10-2 to avoid disturbing the magnetic field. They are arranged within the vessel (2) to be immersed in the liquid metal when the vessel (2) contains the same, thereby allowing an electrical current (I) to flow through the liquid metal between the first and one or more second electrodes (12, 14). The magnetic field has a major component which is substantially perpendicular to the flow of electrical current (I) through the liquid metal between the first and one or more second electrodes (12, 14). This generates a Lorentz force acting on the liquid metal, causing it to rotate around the longitudinal axis (Z) of the vessel (2). The method may be conducted using such an apparatus. The speed of rotation of the liquid metal is varied by altering the Lorentz force acting on it until the liquid metal forms a vortex inside the vessel (2), which separates the particles of the different chemical species from each other and directs them to a respective one of the underflow or overflow outlets according to their different densities. If the different chemical species also have different magnetic susceptibilities from each other, the magnetic field can act directly on the particles as well in different manners according to their different susceptibilities, thus enhancing their separation according to their different densities. For example, the liquid metal may comprise liquid sodium and the solid particles may comprise the insoluble reaction products from a redox reaction between the liquid sodium and an ore of iron and / or of manganese, in which the liquid sodium acts on the ore as a chemical reducing agent and excess unreacted liquid sodium acts as a transport medium for the insoluble reaction products.

A method of diagnosing internal characteristics of a device includes applying a strong magnetic field to the device. The method can include reducing the strong magnetic field at a location of one or more sensors. At least one of the one or more sensors is proximate to the device. The method can include measuring induced magnetic fields around the device. The method can include measuring induced or intrinsic electrical current flow. The method can include measuring intrinsic magnetic properties. The induced magnetic fields can include diagnostic information on properties of the device and how the properties change over time. The device may be, for example, a battery, a capacitor, a supercapacitor, or a fuel cell. The presented measurement of magnetic susceptibility can be performed on materials, solutions, chemical substances, or tissue samples.

The application discloses a kind of underground rock mass magnetic target positioning method, system, equipment, medium and product based on aeromagnetic three-component data, it is related to geophysical prospecting field, the method includes obtaining the aeromagnetic three-component data of multiple measuring points in measurement area;According to the aeromagnetic three-component data of multiple measuring points in the measurement area, the magnetization direction of the magnetic target in the measurement area is determined;The magnetization direction includes total magnetization dip angle and total magnetization declination;According to the aeromagnetic three-component data, the position and magnetic susceptibility of the magnetic target in the measurement area are determined using step-by-step weighting inversion method.The present application can effectively utilize the rich geological information in aeromagnetic three-component data, combined with step-by-step weighting inversion method to improve the stability and resolution of inversion, can quickly and accurately obtain the position and direction information of underground rock mass.

This invention discloses a method and system for identifying tectonic mineralization models based on multi-scale aeromagnetic data processing, relating to the field of geological and mineral exploration technology. The method includes: collecting and preprocessing regional and local-scale raw aeromagnetic data; decomposing standardized aeromagnetic data into multiple components at different scales using the db4 wavelet basis, corresponding to geological body information at different depths; performing targeted interference removal on each scale component using adaptive threshold filtering; extracting magnetic anomaly information using anomaly enhancement technology; quantifying and extracting multi-scale tectonic information based on magnetic anomalies and known geological data, and performing apparent magnetic susceptibility imaging inversion; establishing a magnetic anomaly feature library for typical mineralization models and constructing a multi-scale tectonic-mineralization correlation model; constructing a discrimination model using a random forest algorithm, outputting the mineralization model type, mineralization potential level, and favorable target area, and verifying the results. This invention solves the problems of incomplete tectonic identification, inaccurate interference removal, and strong subjectivity in mineralization identification inherent in traditional methods.

The invention relates to the field of rock core analyzers, and discloses a full-automatic rock core analyzer which comprises a case and further comprises a three-axis motion platform installed in the case, and the moving end of the three-axis motion platform can move in the axial direction and the radial direction of a rock core charge bar to be detected; and the connecting plate is fixedly carried at the moving end of the three-axis motion platform, and a magnetic susceptibility instrument, an XRF analyzer, a colorimeter and a gamma ray instrument are sequentially integrated on the connecting plate in the preset scanning direction of the rock core charge bar. In the invention, the magnetic susceptibility instrument, the XRF analyzer, the colorimeter and the gamma ray instrument are integrated on the same connecting plate, so that the detection ends of the four instruments are ensured to be always in the optimal detection range of the same area of the rock core by virtue of the radial adjustment function of the three-axis motion platform, and the multi-dimensional and high-efficiency detection requirements are met.

The application belongs to the field of tunnel and underground engineering grouting technology, and provides a slurry diffusion range rapid exploration method and system based on magnetic tracer material, and the technical scheme is: based on the determined magnetic field detection line, drawing the target area grouting before and after the magnetic field distribution map; according to the target area grouting before and after the magnetic field distribution map, the abnormal magnetic field distribution characteristics are calculated; based on the obtained magnetic grouting body magnetization rate and magnetic field response characteristics after grouting, the underground magnetic grouting body distribution range is inverted, and the magnetic grouting body stratum model is drawn; the magnetic grouting body stratum model is modified combined with the obtained abnormal magnetic field distribution characteristics, and the magnetic grouting body distribution range is obtained. By adding magnetic tracer material in the slurry, combined with the airborne magnetic survey method, the slurry diffusion range rapid exploration in the stratum grouting reconstruction engineering is realized, and the efficiency of the grouting effect evaluation is improved.

The application relates to the technical field of magnetic measurement, and discloses a method for measuring AC magnetic susceptibility, which comprises the following steps: controlling a first excitation coil and a second excitation coil arranged in pairs in an alternating gradient magnetometer to generate a uniform alternating magnetic field in a sample seat region; when frequency conversion testing is performed, the frequency of the uniform alternating magnetic field is adjusted, and a first induction signal of a differential detection coil is acquired; wherein the sample seat is located in a measurement region of the differential detection coil; and the AC magnetic susceptibility of a sample is acquired according to the first induction signal. By multiplexing the device structure of the alternating gradient magnetometer, a uniform alternating magnetic field is generated in the sample seat region as an alternating magnetic field source for measuring the AC magnetic susceptibility of the sample, and the differential detection coil can be integrated into the alternating gradient magnetometer. An alternating magnetic field source and a detection system do not need to be additionally arranged, and the cost of measuring the AC magnetic susceptibility is reduced. The application further discloses a device for measuring AC magnetic susceptibility, a magnetic measurement device and a computer readable storage medium.

The utility model relates to a magnetic susceptibility instrument special-shaped object measuring and placing device which comprises a shell cylinder, a partition plate is arranged in the shell cylinder, a through hole is formed in the partition plate, a fixing piece is arranged in the shell cylinder and comprises a vertical pipe and a suction cup arranged below the vertical pipe, and the vertical pipe is arranged in the through hole; according to the utility model, the shell cylinder is placed in the measuring cavity to place a special-shaped sample, so that the sample does not need to be damaged; the fixing piece can assist in fixing the shell, and shaking or deviation is avoided.

The invention relates to a complex ferromagnetic two-dimensional body exploration method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring information of a ferromagnetic two-dimensional body exploration area, dividing a field source area and an underground observation area into a plurality of rectangular units along x and z directions respectively, and correspondingly obtaining a field source grid and an underground observation grid; obtaining initial effective magnetization intensity according to the assigned magnetic susceptibility information; constructing a Green function unit integral coefficient of each rectangle of the underground observation grid by an arc tangent function and a logarithmic function; constructing a compressed kernel matrix according to a Green function unit integral coefficient, constructing a field source expansion matrix according to the initial effective magnetization intensity, further performing fast convolution calculation to obtain a magnetic anomaly value of a given field source layer, obtaining a magnetic anomaly value of a given observation height through a mode of accumulation of a plurality of vertical one-dimensional discrete volumes, and performing iteration to obtain a magnetic anomaly value of a given observation height; and outputting a total magnetic field value after iterative convergence. The method can reduce the calculation amount on the premise of ensuring the precision.

A method for measuring relative concentrations of materials in a mixture includes providing an emission coil and at least one reception coil, providing a mixture with n materials having different magnetic susceptibilities, and introducing the mixture into the reception coil. Using a voltage generator the emission coil is supplied with at least one nonzero excitation frequency so as to generate an excitation magnetic field and the signal of the voltage induced in the reception coil is measured. Relative concentrations of the n materials are determined based on comparison between the overall susceptibility of the mixture as obtained through the voltage measurement and that of a reference mixture for which the relative concentrations of the n materials are known.

The application discloses a magnetic susceptibility identification method for deep structure analysis of a mining area, and relates to the technical field of geological mineral exploration. The magnetic susceptibility identification method for deep structure analysis of a mining area comprises the following steps: data acquisition and preprocessing, model construction and inversion, magnetic susceptibility anomaly identification, and structure analysis and classification. According to the initial three-dimensional geological model and through the layered mixed inversion method, the magnetic susceptibility is inverted, the advantages of different inversion algorithms can be fully exerted, the shortcomings of a single algorithm can be made up, the accuracy of the magnetic susceptibility inversion result is improved, the efficient local algorithm and the strong global algorithm can be respectively used according to the geological characteristics of the shallow area and the deep area, the calculation efficiency and stability of the magnetic susceptibility inversion are improved, the set buffer area can smoothly transition and fuse the results of different magnetic susceptibility inversions, the continuous and reliable inversion result is ensured, the subsequent magnetic susceptibility anomaly identification is facilitated, and the identification effect of the magnetic susceptibility identification method is improved.

A system for removing iron ore particles adhered by magnetic hysteresis to a magnetic matrix of a vertical magnetic separator, the vertical magnetic separator having a separation ring with a magnetic matrix; an ore feed inlet an ore accumulation vessel positioned in the lower portion of the magnetic matrix and having an outlet for low magnetic-susceptibility material; a magnetic field-generating device adapted to generate a magnetic field in the region of the accumulation vessel; at least one collection tray positioned internally to the magnetic matrix and adapted to collect material with greater magnetic susceptibility detached from the magnetic matrix; and a collecting container adapted to receive the material with greater magnetic susceptibility from at least one collecting tray. The system further includes a demagnetizer; a mechanical device for cleaning the magnetic matrix positioned at a position subsequent to the demagnetizer; and at least one device generating jets of compressed air.

The utility model is suitable for the field of rock ore exploration equipment, provides a kind of magnetization tool for rock ore magnetic field calibration, including base, sample fixed subassembly, magnetization adjusting subassembly and measurement display component, the sample fixed subassembly includes fixed platform, arc clamping plate, adjusting screw rod and riser, fixed platform is fixed at the top of base, the arc clamping plate, adjusting screw rod and riser are equipped with two, two arc clamping plates are symmetrically set on the top of fixed platform, two adjusting screw rods are all screw-connected in riser, and the end of two adjusting screw rods close to each other is all connected with arc clamping plate by bearing;In the utility model, sample fixed subassembly is cooperated by arc clamping plate, adjusting screw rod, and is matched with rubber pad and antiskid knob, and different size rock ore samples can be stably fixed, avoid shaking when measuring, guarantee measurement stability and accuracy, and convenient operation.

The invention relates to the technical field of information materials, and discloses a multi-metal fluoride low-temperature magnetic sensing material and a preparation method thereof, the magnetic sensing material is a perovskite structure fluoride, the chemical general formula of the magnetic sensing material is K (1-x) NaxNi (1 / n + 1) M (1 / n + 1) F3, 0 < = x < = 0.2, n < = 4, and M is at least one of Mg, Mn, Co and Zn; under the action of an alternating-current magnetic field, the response peak temperature interval of the virtual part of the alternating-current magnetic susceptibility of the magnetic sensing material is narrower than the response temperature interval of the real part of the alternating-current magnetic susceptibility, and the multi-metal fluoride magnetic sensing material provided by the invention has an obvious magnetic response characteristic under a low-temperature condition, and has an obvious magnetic response characteristic within the temperature range of 2-20K; when a polarization magnetic field of 0.4 Oe and a driving magnetic field of 4 Oe are applied within the frequency range of 10-700 Hz, the material can generate an obvious magnetic response signal.

The application provides a fresh biopsy sample diffusion coefficient measurement method and device, the method comprises: enhancing the susceptibility of water molecules in the fresh biopsy sample; after the water molecules in the fresh biopsy sample are magnetically saturated, exciting the water molecules in the fresh biopsy sample to spin; collecting the magnetic resonance signal strength of the spin magnetic moment evolution of the water molecules in the fresh biopsy sample; and determining the diffusion coefficient according to the magnetic resonance signal strength. The application enhances the susceptibility of water molecules in the fresh biopsy sample and excites the water molecules to spin, thereby achieving the effect of enhancing the water molecule magnetic resonance signal, and then collecting the magnetic resonance signal strength of the spin magnetic moment evolution of the water molecules to determine the diffusion coefficient, so that the fresh biopsy sample can be quantitatively measured in terms of diffusion coefficient with high spatial resolution and high imaging efficiency on a low-field nuclear magnetic resonance imaging instrument.

The application discloses a kind of high-precision magnetic susceptibility measurement systems based on atomic magnetometer, comprising: first coherent light source, second coherent light source, first polarization beam splitter, second polarization beam splitter, third polarization beam splitter, 1 / 4 wave plate, half wave plate, balanced detector, rubidium atomic ensemble, helmholtz coil, magnetic shield, electromagnet, guide tube, guide coil, vacuum pump, electromagnetic valve, air pipe.The application is based on the magneto-optical rotation effect generated in rubidium atomic ensemble, realizes sample polarized magnetic field measurement, and the ratio of polarized magnetic field and the magnetic field generated by electromagnet is sample polarizability.The measurement system disclosed in the application has very important application prospect in the field of precision measurement, geological exploration and biomagnetic field measurement.Compared with traditional magnetic susceptibility meter, the application uses emerging ultra-sensitive atomic magnetometer as magnetization probe, and has great improvement in magnetic field measurement sensitivity.

The demonstration device for the magnetic susceptibility difference of different fluid substances in the magnetic field comprises a support, a container supporting disc, a magnet disc, a powerful magnet, a supporting rod, an equipment support, a glass container and video recording equipment, the container supporting disc is installed on the upper portion of the support, and the glass container is arranged on the container supporting disc. Multiple layers of magnet disc height adjusting supporting blocks are symmetrically arranged on the two sides of the lower portion of the support respectively, the magnet disc is erected on the two magnet disc height adjusting supporting blocks of any layer height, the powerful magnet is located below the glass container and installed on the magnet disc, and the bottom of the supporting rod is installed on one side of the support. One end of the device support is in threaded connection with the top of the supporting rod through a bolt and nut assembly I. The video recording device is installed at the other end of the device support. According to the utility model, the paramagnetism and diamagnetism phenomena of different fluid substances can be effectively detected and analyzed, and a simple, visual and accurate means is provided for the research of the magnetic characteristics of the fluid substances.