86 results about "High field" patented technology

The invention belongs to the technical field of superconducting wires, and relates to a niobium-tin composite superconducting wire and a preparation method thereof. The invention provides a Nb3Sn composite superconducting wire. The Nb3Sn composite superconducting wire sequentially comprises an Nb3Sn superconducting wire core, a barrier layer, a stable layer, a transition layer, a substrate layer and a functional layer from inside to outside, the transition layer is formed by mixing copper and a dielectric polymer, and the copper content is continuously decreased in a gradient manner from inside to outside; the substrate layer is the dielectric polymer; the functional layer is a plurality of protruding metal microstructures. According to the invention, the functional layer with the broadband electromagnetic stealth function is integrated on the basis of the Nb3Sn superconducting wire rod, so that the radar cross section is obviously reduced while the Nb3Sn superconducting wire rod bears high-density superconducting current and generates a strong magnetic field, and the technical problem that a high-field superconducting magnet system is easy to detect in an electromagnetic environment is solved.

The invention discloses an internally-inserted water-cooled magnet device for a high-field hybrid magnet. The internally-inserted water-cooled magnet device comprises a container assembly and a magnet coil assembly arranged in the container assembly. The container assembly comprises an upper barrel assembly, a container end cover, a hydraulic machine assembly, a center pipe assembly, an inner supporting assembly, a middle barrel assembly, a lower barrel assembly and an electric connecting assembly. The hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The axial force application device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, and the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved.

The invention discloses a high-field water-cooling magnet device which comprises a container assembly and a magnet coil assembly, and the magnet coil assembly is located in the container assembly and communicated with the container assembly. The container assembly comprises a hydraulic machine assembly, and the hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The axial force application device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, and the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved.

The invention relates to the technical field of superconducting material processing, in particular to a preparation method of an Nb3Sn superconducting wire. The method mainly comprises the steps that Nb-Zr alloy is loaded into the exterior and / or the center of a Sn-Cu single-core rod, oxide powder is filled between the Nb-Zr alloy and the Sn-Cu single-core rod, then the Sn-Cu single-core rod and the Nb-Zr alloy are loaded into a copper substrate, and Nb3Sn subcomponents are obtained after multi-pass stretching, forming and fixed-length cutting; and uniformly arranging the Nb3Sn sub-components in the copper pipe along the circumferential direction to form a bundle, and after multi-pass stretching, carrying out heat treatment and cutting to obtain the Nb3Sn superconducting wire. By introducing the artificial point pinning array in density gradient distribution, the critical current density of the Nb3Sn superconducting wire in a high magnetic field of 8T-16T is enhanced, the problems that an existing uniform artificial point pinning center scheme generates a matching effect and limits the actual application of the superconducting wire are solved, and the decline degree of the critical current density of the Nb3Sn superconducting wire in the high field is relieved.

Techniques are described for lowering strains applied to superconducting material in a superconducting magnet by arranging structural partitions between turns of the superconducting material that intercept and transfer strain to a mechanically stronger structure, such as the housing of the magnet. A structural partition may be formed with a feedthrough slit so that the superconducting material can easily pass through the partition. A number of structural partitions may be interspersed between groups of turns of superconducting material in a magnet so that forces can be sufficiently distributed by the partitions throughout the magnet. At the same time, the number of structural partitions may be selected to minimize the amount of space within the magnet occupied by the partitions that could otherwise be occupied by current-carrying superconducting material.

The invention belongs to the technical field of superconducting materials, and discloses an internal tin method Nb3Sn superconducting wire integrated with a piezoelectric sensing function and a preparation method of the internal tin method Nb3Sn superconducting wire. According to the method, a piezoelectric functional layer and a dielectric layer are prepared on the surface of a SnAl alloy rod, a CuAg alloy rod is installed after drilling to form a composite rod, the composite rod is inserted into an inner tin method Nb3Sn / CuNb composite pipe to be drawn into a subcomponent, then the subcomponent is bundled and installed into a Ta pipe and an oxygen-free copper pipe, and the wire is prepared through multiple times of stretching. The piezoelectric functional layer can convert micro strain into measurable electric signals, in-situ real-time monitoring of mechanical stress and the like in the wire rod is achieved, the CuAg alloy bar can stabilize the tensile strength of the wire rod and promote generation of an Nb3Sn phase, and on the premise that the superconducting performance is not affected, the operation reliability and safety of the high-field magnet under the extreme working condition are improved.

The invention relates to the technical field of nuclear magnetic resonance, and provides a broadband tuning system for a high-field nuclear magnetic resonance coil. The system comprises a radio frequency coil, a radio frequency shielding layer and a driving mechanism, the radio frequency shielding layer and the radio frequency coil are coaxially arranged in the axial direction, and the radial size of the radio frequency shielding layer is larger than that of the coil. The driving mechanism drives the radio frequency shielding layer and the radio frequency coil to generate axial relative movement, so that the axial overlapping length between the radio frequency shielding layer and the radio frequency coil is continuously changed. According to the system, the electromagnetic coupling strength between the radio frequency shielding layer and the radio frequency coil can be adjusted through mechanical displacement, then the equivalent inductance of the coil is changed, and finally continuous and broadband tuning of the resonant frequency of the coil is achieved. According to the invention, traditional capacitance tuning is replaced by pure physical mechanical adjustment, so that the physical limitation and parasitic effect of micro capacitance in a high field are effectively avoided, the uniformity of a radio frequency magnetic field is maintained on the premise of not changing the structure of the coil, and the compatibility and stability of high-field and multi-core detection are effectively improved.

The application discloses a method for improving critical current of REBCO superconducting layer and relates to the technical field of superconducting materials.The method for improving critical current of REBCO superconducting layer comprises the following steps: REBCO superconducting tapes are annealed in a pure oxygen atmosphere, quenched to 20-25 DEG C, and then the surface silver layer is removed by a chemical method, after which the REBCO superconducting tapes are annealed in a mixed atmosphere of ozone and oxygen, and a protective layer is deposited, so that the critical current of the REBCO superconducting layer is finally improved.The carrier concentration of the REBCO superconducting tapes can be effectively controlled through the specific multi-step oxidation process, so that the REBCO superconducting tapes break through the under-doped state commonly existing in the prior art, reach the over-doped level, and then the critical current performance of the tapes is significantly improved.The method has simple process, high stability and high industrial feasibility, and can meet the demand of higher current-carrying capacity of REBCO tapes in key fields such as power transmission and high-field magnets.

The invention relates to the technical field of ultra-low field magnetic resonance systems, in particular to a battery charge state detection method and system based on closed-loop adaptive ultra-low field MRI, and the method comprises the steps: collecting the phase change of a water molecule H signal caused by the magnetic field disturbance of a to-be-detected battery, and reconstructing a first signal phase image; extracting to obtain a high-information-content area mask, and then performing resampling to obtain a second signal phase image; and inputting the second signal phase image into a state-of-charge detection model to predict a state-of-charge value of the to-be-detected battery. In order to solve the problem that a battery magnetic resonance detection scheme in the prior art needs to adopt a high-field magnetic resonance system and is not beneficial to production line use, detection equipment is replaced with an ultralow-field magnetic resonance system, so that structures such as a shielding room in a traditional magnetic resonance system are omitted, and a high-information-content area is positioned firstly, so that the detection efficiency is improved; and resampling is carried out on the region, so that the imaging precision is improved, and the accuracy of state of charge estimation of the detection model is improved.

This invention belongs to the field of superconducting materials technology and discloses an internal tin-based Nb3Sn superconducting wire with integrated piezoelectric sensing function and its preparation method. The method involves preparing a piezoelectric functional layer and a dielectric layer on the surface of a SnAl alloy rod, drilling a hole, inserting a CuAg alloy rod to form a composite rod, inserting it into an internal tin-based Nb3Sn / CuNb composite tube, drawing it into sub-components, and then bundling them into a Ta tube and an oxygen-free copper tube. The wire is then obtained through multiple stretching operations. The piezoelectric functional layer can convert minute strains into measurable electrical signals, enabling in-situ real-time monitoring of internal mechanical stresses within the wire. The CuAg alloy rod can stabilize the tensile strength of the wire and promote the formation of the Nb3Sn phase, improving the operational reliability and safety of high-field magnets under extreme conditions without affecting superconducting performance.

The application relates to a field effect transistor and a power electronic system. The field effect transistor comprises a substrate, a channel layer formed on the substrate, a barrier layer formed on the channel layer, a two-dimensional electron gas channel formed between the barrier layer and the channel layer, a source electrode, a gate electrode and a drain electrode formed on the barrier layer and arranged in sequence at intervals along a first direction, a P-type compensation island at least partially higher than the barrier layer and located between the gate electrode and the drain electrode, the P-type compensation island being spaced apart from the drain electrode and the gate electrode, a shielding plate located above the P-type compensation island, a passivation layer arranged between the shielding plate and the P-type compensation island, and the shielding plate being arranged at intervals from the gate electrode and the drain electrode. Through the coupling effect of the P-type compensation island and the shielding plate, the potential distribution between the gate electrode and the drain electrode is more uniform, thereby reducing the peak value of the high field on the drain side, improving the breakdown margin, and effectively reducing the virtual gate effect caused by electron capture after high-voltage turn-off, thereby greatly reducing the increase of the dynamic on-resistance.

The invention relates to the technical field of magnetic resonance imaging, in particular to an intra-operative low-field magnetic resonance intelligent navigation method based on preoperative high-field data guidance, which comprises the following steps: acquiring a high-field MRI image of a patient before an operation and extracting a three-dimensional segmentation mask and clinical features of a focus; adjusting according to the clinical features to obtain an intraoperative scanning protocol; and performing low-field magnetic resonance examination during the operation to generate an intra-operation navigation image, and marking focus information. Aiming at the problem that the accuracy of a focus image provided by an ultra-low field system in the operation process in the prior art is not enough, a high-field MRI image collected before the operation is introduced as a reference, scanning sequence parameters of the ultra-low field system used in the operation are dynamically adjusted based on clinical features embodied in the high-field MRI image, a better imaging effect is achieved, and meanwhile, the accuracy of the focus image provided by the ultra-low field system in the operation process is improved. Focus information is marked on the intraoperative navigation image based on the three-dimensional segmentation mask as prior information, so that more refined segmentation of focuses on the intraoperative navigation image is realized, and the surgical requirements are met.

The application provides a radio frequency coil applied to a magnetic resonance imaging device, which comprises a plurality of loop-shaped coil units, the plurality of coil units are distributed in a circumferential direction around a preset axis and are sequentially connected; a plurality of feed ports corresponding to the coil units, the feed ports are arranged on the corresponding coil units; and a plurality of capacitors, at least one capacitor is coupled to each coil unit. Through the above configuration, the capacitors are arranged to adjust the circuit characteristics of the coil units; compared with the prior art, the plurality of coil units and the corresponding plurality of feed ports can increase the number of channels of the radio frequency coil to be greater than four, so that the radio frequency coil can be applied to a high-field or ultrahigh-field transmitting coil; in addition, the cooperation of the plurality of coil units and the plurality of feed ports can also improve the shimming of the radio frequency coil.

This invention relates to the field of superconducting material processing technology, specifically to a method for preparing Nb3Sn superconducting wires. The invention mainly involves inserting an Nb-Zr alloy into the exterior and / or center of a Sn-Cu single-core rod, filling the space between the Nb-Zr alloy and the Sn-Cu single-core rod with oxide powder, and then inserting it into a copper substrate. After multiple passes of stretching, forming, and length-cutting, Nb3Sn sub-components are obtained. These Nb3Sn sub-components are then uniformly arranged circumferentially within a copper tube to form a bundle, followed by multiple passes of stretching, heat treatment, and cutting to obtain the Nb3Sn superconducting wire. This invention enhances the critical current density of the Nb3Sn superconducting wire under high magnetic fields of 8T–16T by introducing an artificially pinned array with a density gradient distribution. This solves the problem of the matching effect produced by existing uniform artificially pinned center schemes, which limits the practical application of superconducting wires, and alleviates the decrease in critical current density of Nb3Sn superconducting wires under high fields.

The invention discloses a method for preparing a REBCO-NbTi-REBCO mixed superconducting joint through brazing, and belongs to the technical field of superconducting, and the method comprises the following steps: (1) NbTi wire pretreatment and welding section preparation, (2) REBCO-NbTi horizontal welding, and (3) REBCO-NbTi-REBCO annular structure joint welding. According to the manufacturing method, a REBCO-NbTi-REBCO sandwich welding structure is adopted, the problem of poor contact caused by geometrical morphology difference of REBCO strips and NbTi wires is solved, mutual inductance interference is eliminated, only NbTi coil self-inductance is reserved, the resistance of the obtained connector reaches the magnitude of 10 ohms, the application requirements of the fields such as high-field magnets can be met, and the manufacturing method is easy to operate, controllable in cost and suitable for industrial production. And a technical support is provided for the engineering application of the REBCO-NbTi mixed superconducting joint.

The invention relates to a comprehensive recycling method of gold ore cyaniding slag. The method comprises the following steps: (1) primary ore grinding; (2) primary and secondary ultrahigh field intensity magnetic separation pre-enrichment; (3) concentrate grading fine grinding and leaching while grinding; (4) cyaniding all mud to extract gold and silver; (5) collecting iron through third-fourth stage medium-intensity magnetic separation; (6) deep decyanation by an inconel method; and (7) refining gold and silver and casting ingots. According to the method, the system process of ultrahigh field intensity magnetic separation pre-enrichment, graded ore grinding and leaching while grinding, all-mud cyanidation gold and silver extraction, medium-intensity magnetic separation iron recovery and inconel method deep decyanation is adopted, comprehensive recovery of gold, silver and iron is achieved, and the recovery rate and the grade are far superior to those of a traditional process; and meanwhile, light weight of cyanidation tailings stockpiling and deep decyanation of high-cyanide-content tailings are realized, four industrial pains of insufficient dissociation, low iron recovery rate, poor product quality and high environmental risk of tailings in the traditional process are overcome, and synchronous improvement of resource recovery rate, economic benefit and environmental benefit is realized.

The invention relates to a transmitting coil. The transmitting coil comprises two end rings and a plurality of coil crosspieces, wherein the plurality of coil crosspieces are arranged between the two end rings; the structure of each coil crosspiece comprises a first dielectric layer, a plurality of first metal layers and a plurality of second metal layers, the plurality of first metal layers are distributed and attached to one side of the first dielectric layer, and the plurality of second metal layers are distributed and attached to the other side of the first dielectric layer; and each first metal layer and the second metal layer at the corresponding position of the other side of the first dielectric layer form a capacitor. By using the transmitting coil provided by the invention, the specific absorption rate (SAR) in high-field magnetic resonance scanning can be reduced.

The application discloses a D-shaped profile superconducting coil mounting tool and method, and relates to the field of nuclear fusion superconducting coil manufacturing.The tool comprises the following steps: installing and fixing a separately adjustable lifting platform; leveling the lifting platform by using a laser tracker; installing a high-field coil inner profile limiting tool; installing a high-field coil lifting tool; lifting the high-field coil to the lifting platform; positioning and lowering along the inner profile limiting tool and a profile line; lowering the adjustable lifting platform at intervals, taking out the lifting tool, and restoring the original height; installing a middle-field coil outer profile limiting tool; installing a single conductor lifting tool; installing a gap filling plate and a middle-field coil lifting tool; lifting the middle-field coil through the single conductor and lowering it on the lifting platform; measuring the installation gap between the two coils, and completing the coil assembly.The tool comprises the following: an adjustable lifting platform, a lifting tool, an inner profile limiting tool, an outer profile limiting tool, a single conductor lifting tool, and a gap filling plate.The application improves the installation precision, and ensures the safety and stability of the superconducting coil during lifting.

This invention discloses a magnetic array-enhanced non-metallic alkaline water hydrogen production electrolyzer, which is constructed by stacking and sealing anode plates, cathode plates, and electrolytic bipolar plates with gaskets and diaphragms layer by layer. Each anode plate, cathode plate, and electrolytic bipolar plate includes a non-metallic frame, a graphite liner, a cylindrical permanent magnet array, and nickel foam electrodes. The magnet array is positioned between the graphite liner and the nickel foam electrodes. The electrolytic bipolar plates and end plates enclose an electrolysis chamber, and the number of bipolar plates can be increased or decreased as needed. This invention utilizes a cylindrical permanent magnet array to construct a high-field, strong gradient magnetic field, leveraging oxygen paramagnetism to achieve efficient bubble desorption and enhance the oxygen evolution reaction rate. A star-shaped flow field structure fills the gaps in the magnet array, optimizing electrolyte distribution and enhancing mass transfer efficiency, effectively improving the hydrogen production performance and electrolysis efficiency of the electrolyzer.

The invention relates to a local coil transmitter device for a high-field magnetic resonance imaging (MRI) scanner. The local coil transmitter device comprises a plurality of mechanically separate antenna coils arranged at an angle relative to each other.

The application belongs to the technical field of superconducting materials, and particularly relates to a superconducting composite wire and a preparation method thereof. The application provides a superconducting composite wire, which comprises, from inside to outside, an inner tin method Nb3Sn sub-element, a thermal sensitive phase change barrier layer, a Cu-Mn-Ni high-damping copper alloy stabilizing layer, a thermochromic warning coating and an outer insulating sheath. The application can be widely applied to high-field magnets in fusion reactors, high-energy accelerators and advanced MRI systems, and can significantly improve the operation safety and state monitoring capability.

The application discloses a traveling wave antenna unit, an array and a method for improving high-field magnetic resonance radio frequency field uniformity, relates to the field of magnetic resonance imaging, and aims to improve high-field magnetic resonance radio frequency field uniformity. The application increases the component of the wave number of the traveling wave antenna unit in the traveling wave transmission line direction in the traveling wave antenna array through physical or chemical means to relieve the radial standing wave effect. The traveling wave antenna unit comprises a layer-by-layer designed metal microstrip, a first bearing substrate, a filling layer substrate, a slotted metal floor, a second bearing substrate and a spacing layer substrate. A feeding port is connected between the first end of the metal microstrip and the slotted metal floor, and a load is connected between the second end of the metal microstrip and the slotted metal floor. The filling layer substrate is a fillable structure. The component in the traveling wave transmission line direction is increased by increasing the relative dielectric constant of the filling medium or changing the slotted structure. The application is simple in design, convenient in operation and does not need additional hardware.

This invention belongs to the technical field of high-field magnet structure design, specifically involving an adaptive selection method for simulation type in pulse magnet structure design. The method includes: establishing a model of the pulse magnet; using a circuit model to calculate the actual current waveform of the magnet at the required power supply voltage; importing this waveform into an electromagnetic finite element model to calculate the peak electromagnetic load of the magnet; applying this load as a single step load to the structural finite element model; extracting the stress-time curve of each target component; and extracting the fundamental component of this curve using Fourier transform to determine the natural vibration frequency of the component. ω m Perform a Fourier transform on the actual current waveform to determine its fundamental component. ω i If all target components ω m All are greater than N × ω i If a steady-state simulation evaluation is selected, then this invention can solve the problem of the lack of a standardized operating system in the existing pulse magnet structure design that can reasonably use static analysis results to approximate transient analysis results.

The invention discloses a method for improving critical current of an REBCO superconducting layer, and relates to the technical field of superconducting materials. The method for improving the critical current of the REBCO superconducting layer comprises the following steps: performing annealing treatment on an REBCO superconducting strip in a pure oxygen atmosphere, quenching to 20-25 DEG C, removing a surface silver layer by a chemical method, annealing in a mixed atmosphere of ozone and oxygen, depositing a protective layer, and finally realizing the improvement of the critical current of the REBCO superconducting layer. Through a specific multi-step oxidation process, the carrier concentration of the REBCO superconducting strip can be effectively regulated and controlled, the common under-doping state in the prior art is broken through, the over-doping level is achieved, and then the critical current performance of the strip is remarkably improved. The method is simple in process, high in stability and industrial feasibility, and capable of meeting the requirement for higher current-carrying capacity of the REBCO strip in the key fields of power transmission, high-field magnets and the like.

The invention discloses a D-shaped contour superconducting coil installation tool and method, and relates to the field of nuclear fusion superconducting coil manufacturing, and the method comprises the steps: installing and fixing an independent adjustable lifting platform; leveling the lifting platform by adopting a laser tracker; a high-field coil inner contour limiting tool is installed; mounting a high-field coil lifting appliance; hoisting the high-field coil to a lifting platform surface; positioning and descending along the inner contour limiting tool and the contour line; lowering the adjustable lifting platform at intervals, taking out the lifting appliance, and restoring to the original height; installing a midfield coil outer contour limiting tool; mounting a single conductor lifting tool; mounting a gap filling plate and a midfield coil lifting appliance; during hoisting, the field coil penetrates through the single conductor and falls on the lifting table; and measuring the mounting gap of the two coils to complete coil assembly. The tool comprises an adjustable lifting platform, a lifting appliance, an inner contour limiting tool, an outer contour limiting tool, a single conductor lifting tool and a gap filling plate. According to the invention, the installation precision is improved, and the safety and stability of the superconducting coil in the hoisting process are ensured.

This invention discloses a low-temperature and high-temperature superconducting hybrid toroidal field magnet for thermonuclear fusion devices, relating to the field of magnetic confinement fusion technology. The invention proposes placing second and first toroidal reinforcing support structures between radially graded high-field, mid-field, and low-field windings, respectively. These structures are made of high-strength stainless steel (such as N50, JJ1, JK2LB, or reinforced 316LN) with a yield strength >1000 MPa and permeability <1.05 at extremely low temperatures. This provides an internal rigid framework that effectively resists toroidal compression, significantly reduces shear forces on the insulation material within the coil windings, and increases the design upper limit of the toroidal field magnet. Simultaneously, it allows for a reduction in the thickness of the nose region of the coil housing, saving extremely valuable radial space in the center of the device. This invention, combined with the graded use of superconducting materials, achieves a highly efficient balance between device economy and performance.

The application discloses a method for high-resolution functional imaging in a high-field magnetic resonance system. The method comprises the following steps: S1, determining a two-dimensional spatially selective radio frequency pulse sequence applied to a brain of a subject organism, the two-dimensional spatially selective radio frequency pulse sequence is used for reducing a field of view (FOV) in a phase encoding direction and not generating signal folding. Preferably, the method further comprises the following step: S2, performing under-sampling and reconstruction on K-space based on an EPI-based GRAPPA algorithm. The application has the beneficial effect of realizing high-resolution functional imaging in a high-field magnetic resonance system.

The invention discloses a gadolinium-based magnetic resonance / near-infrared fluorescence bimodal probe as well as preparation and application thereof, and relates to the field of nano materials and medical engineering. The bimodal probe comprises nanoparticles formed by coordination and self-assembly of gadolinium ions and indocyanine green through sulfonic acid groups, and the molar ratio of the gadolinium ions to the indocyanine green is (2-10): 1. The bimodal probe shows the relaxation performance which is obviously superior to that of other clinical common contrast agents in a 9.4 T ultrahigh field magnetic resonance system, and the longitudinal relaxation rate of the bimodal probe can reach 22.3 mM <-1 > s <-1 >. The bimodal probe can be directly produced on a large scale on the basis of clinically approved drugs, and the bimodal probe has excellent imaging performance and blood-brain barrier penetrating power and provides a very potential strategy for image-guided biomedical application.

The invention discloses an intelligent traditional Chinese medicine packet treatment system based on multi-physics field dynamic coupling, a preparation method and a regulation and control method, and relates to the technical field of intelligent traditional Chinese medicine instruments. The far infrared bag comprises a graphene heating sheet and a double-PID temperature control module; the composite magnetic therapy bag contains Al2O3 core-shell structure neodymium iron boron particle magnetic powder formed by plasma vapor deposition; the four-point magnetic coupling positioning mechanism is composed of an annular N-S pole alternating magnetic snap group and a Hall sensor array; and the biocompatible isolation cloth is assembled on the human body contact side of the composite magnetic therapy bag and is used for isolating the composite magnetic therapy bag from the human skin. The system has the advantages of high temperature control precision, high field domain coupling efficiency, strong high-temperature stability of the magnetic powder, short clinical treatment course, low safety risk, high intelligent degree and the like, and can be widely applied to the fields of medical rehabilitation, primary medical treatment, family health, sports medicine and the like.