35 results about "Pulse magnetic field" patented technology

This application relates to the field of implantable medical device technology, and discloses a temporary cardiac pacing system and method. The temporary cardiac pacing system includes: an external control device and a temporary cardiac pacing device; the temporary cardiac pacing device includes an energy supply unit and a magnetic control unit; the energy supply unit and the magnetic control unit are connected via a connector; the external control device is used to generate pulsed magnetic field signals; the magnetic control unit is used to use the pulsed magnetic field signals to pulse-conduct the circuitry of the temporary cardiac pacing device, thereby controlling the energy supply unit to pulse-discharge, thereby stimulating the myocardium to induce contraction and achieve cardiac pacing. Because magnetic fields have the unique physical advantage of penetrating biological tissue almost without damage, using magnetic field signals to penetrate biological tissue can avoid damage to the biological tissue, thereby reducing the safety risks of the temporary cardiac pacing device.

A device for the coordinated regulation of rotating and pulsed magnetic fields includes: a magnetic field generating unit, magnetic thrombolytic particles, a control system, and a positioning and navigation module. This invention employs a synergistic design of coaxially nested rotating and pulsed magnetic fields, utilizing both the rotating magnetic field to provide mechanical shearing and the pulsed magnetic field to activate the fibrinolytic system. This synergistic effect not only achieves non-invasive and precise targeted treatment but also overcomes the efficiency bottleneck of a single magnetic field. Combined with real-time image closed-loop feedback and dynamic parameter adjustment, this strategy effectively resolves the contradiction between the difficulty of particle retention and powerful thrombolysis, improving thrombolysis efficiency by more than 30% and achieving efficient, non-invasive, and precise treatment.

The application discloses a copper-embedded multilayer board defect detection method and system based on eddy current thermal imaging and impedance spectrum fusion, relates to the technical field of multilayer board defect detection, and comprises the following steps: applying a high-frequency alternating pulse magnetic field to a copper-embedded multilayer board to be detected; continuously collecting thermal field cooling sequence images after pulse excitation, then extracting thermal diffusion coefficients of copper-embedded regions a and thermal field isotheral line distribution characteristics; using test probes of an automatic machine to contact copper-embedded blocks and corresponding network test points on the copper-embedded multilayer board to be detected, injecting a wideband sweep signal, obtaining impedance spectrum and extracting characteristic parameters; and a , thermal field isotheral line asymmetry, Z LF , R HF and Δ θ are constructed into a multi-dimensional feature vector, input into a fusion judgment model, and a judgment result of the copper-embedded multilayer board defect is output according to a preset multiple threshold. The application realizes non-destructive defect detection, and the micro-crack detection rate is about 97%, and the copper-embedded offset and interlayer short-circuit detection rate is 100%.

The scheme discloses a pulse magnetic field porous liquid metal conductive dressing in the technical field of medical wound repair materials, which comprises a flexible porous substrate and a conductive functional layer, the flexible porous substrate is a polyurethane porous foam, and the conductive functional layer is gallium-based liquid metal; the gallium-based liquid metal adheres to a three-dimensional network framework of the polyurethane porous foam to form interconnected small closed loops, thereby constituting a continuous three-dimensional conductive network; the dressing is used in cooperation with an external low-frequency pulse magnetic field generator, and the magnetic flux of the closed loop is changed through the pulse magnetic field to generate an induced micro-current; the dressing has good biocompatibility, flexible fitting and air permeability and liquid absorption, can generate a mild induced micro-current noninvasively without external power supply, can effectively promote wound cell proliferation, migration and collagen deposition, significantly accelerates the healing process of chronic wounds such as diabetic foot and pressure sores, and is simple in preparation process, controllable in cost, and suitable for batch production and clinical transformation.

This application discloses an LTD drive system, a pulse power device, and a steep pulse ablation device, applied in the field of steep pulse ablation technology, to solve the problems of unstable high voltage output amplitude and large time deviation of rising and falling edges in existing pulse power devices. The LTD drive system uses standardized coil winding methods and uniform relative position settings for each transformer, so that when the primary coils of each transformer are synchronously pulse-energized, a pulse magnetic field is synchronously generated in the magnetic core, and finally a pulse voltage is synchronously induced in the secondary coils of each transformer. This makes the amplitude of the steep pulse after the pulse voltages induced by each transformer are superimposed stable, and the time deviation of rising and falling edges is small.

Device (1) for applying a static and / or pulsating magnetic field to an animal, in particular a dog or a cat, comprising at least a body (2) for receiving food and / or a food and / or drinking vessel, at least one magnetic field unit (30) provided in or on the body (2) for generating a static and / or pulsating magnetic field, a power supply device (6) for supplying the magnetic field unit (30) with electrical energy, and a control and evaluation unit (SR) connected to the magnetic field unit (30), wherein the control and evaluation unit (SR) is provided and configured to control the magnetic field unit (30) in such a way that at least one predetermined magnetic field application program is executed during use of the body (2) by the animal.

This invention relates to the field of geophysical exploration technology, and particularly to a method, apparatus, electronic device, and computer-readable storage medium for inverting borehole transient electromagnetic pseudo-3D data from multi-point joint detection. The method includes: emitting a pulsed magnetic field at the borehole opening to acquire an observation dataset; constructing an initial inversion model and pre-setting values ​​for model parameters; based on the equivalent eddy current principle, constructing a functional relationship between the model parameters and the forward modeling theoretical data to obtain the inversion objective function; using a simulated annealing algorithm, with the initial inversion model as the initial iteration condition, iteratively optimizing the inversion objective function to obtain the electrical parameters corresponding to the minimum value of the inversion objective function, and reconstructing the model parameters based on the electrical parameters. Introducing the equivalent eddy current principle and the simulated annealing algorithm into the transient electromagnetic forward modeling calculation of the entire mine space ensures the accuracy and practicality of the final inversion results.

This invention discloses a magnetocaloric voltage excitation device and measurement method, comprising the following steps: In order to obtain a large temperature gradient, a magnetocaloric material with an anomalous magnetocaloric effect is deposited on the lower surface of a spin valve, and a magnetocaloric material with a normal magnetocaloric effect is deposited on the upper surface. By applying a pulsed magnetic field, positive and negative temperature gradients are formed on the upper and lower surfaces of the spin valve, thereby generating an AC thermoelectric voltage pulse. This technology is the first to combine magnetocaloric material with spintronic devices. The sample structure is simple and the measurement is convenient, which is conducive to promoting the application of spintronic devices and the development of spin thermoelectronics.

This invention relates to the field of diabetes treatment device technology and discloses a diabetes microcirculation improvement treatment device based on pulsed magnetic field regulation. The device includes a main unit and several probes, each probe connected to the main unit via a cable. The main unit has a cleaning port on its top surface and a removable top cover. A through-hole is located on the surface of the main unit, through which a push rod slides. One end of the push rod is inside the main unit, and the other end is outside. A partition is fixed inside the main unit. This invention integrates pulsed magnetic therapy, thermotherapy, and red and blue light therapy. It can be adapted to different parts of the body using multiple probe sizes. Under software-controlled coordination, it achieves precise, safe, and controllable microcirculation improvement treatment, meeting the needs of both home and clinical use. The device has an integrated automatic cleaning and disinfection system that automatically disinfects and cleans the probes through atomized spraying and mechanical wiping, avoiding cross-infection and eliminating the need for manual wiping.

This invention discloses a pulsed magnetic field coating treatment device for aerospace cutting tools, relating to the field of magnetic field strengthening technology. It includes a pulsed magnetic field device with a hot spray pipe connected to its surface. A strengthening gun is connected to one end of the hot spray pipe away from the pulsed magnetic field device. A support structure is provided on the surface of the pulsed magnetic field device. The support structure includes an assembly strip fixedly installed on the surface of the pulsed magnetic field device. A slider is slidably installed inside the assembly strip. A shaped plate is fixedly installed on the upper side of the slider. A positioning plate is fixedly installed on the upper surface of the shaped plate. A limiting block is rotatably installed inside the positioning plate. A U-shaped limiting plate is fixedly installed on the upper end of the limiting block. A rotating block is rotatably installed on the upper side of the limiting plate. This invention, by setting up a support structure, facilitates flexible support of the strengthening gun, reduces the labor intensity of workers holding the strengthening gun for extended periods, and further improves the efficiency of magnetic field strengthening of aerospace cutting tool surfaces.

The application provides a magnetic control double-arc additive manufacturing system and a method thereof, a first double-welding gun and a second double-welding gun are both installed on a four-axis linkage system; each welding gun is respectively provided with a wire feeding device; each welding gun is provided with a wire through hole, and the welding wire fed by the wire feeding device enters the wire through hole; each welding gun is further respectively provided with an air passage ring, and the air passage ring is provided with a protective gas path; each welding gun is further respectively provided with a magnetic field ring through hole, and the lower end of the magnetic field ring through hole is provided with a pulse magnetic field generating device and a rod-shaped magnetic head; the pulse magnetic field generating device is controlled by a magnetic field controller; a powder laying lifting platform is provided with a temperature controller, and an upper surface is provided with a substrate; the substrate is respectively provided with a powder laying system at both ends, and the powder laying system is controlled by a powder laying control system. The welding speed and the deposition efficiency are high, the control system is simple, the arc pressure control precision is simple, accurate and controlled by a magnetic field, and the double arcs can be simultaneously or respectively ignited.

This invention belongs to the field of mineral processing particle washing and beneficiation technology, and discloses a washing and separation device for iron ore, including a feed chamber and a device body. The feed chamber is located on and connected to the device body. An electromagnetic coil is arranged at the axis of the device body. The magnetic field generated by the electromagnetic coil is generated downward in a circulating pulse manner to guide the iron concentrate to settle downward. An indentation zone is provided in the middle of the device body, which is used to form eddy currents in the lower section of the device body to break up magnetic agglomerates. This invention outputs pulse levels through the PLC controller port, and controls the conduction of the large circuit via a relay to supply pulse current, thereby forming a circulating and single downward flowing pulse magnetic field that pushes and attracts the iron concentrate downward. In addition, such a pulse magnetic field can effectively prevent the formation of magnetic agglomerates, and the pulse magnetic field is also conducive to breaking up magnetic agglomerates and magnetic chains, thereby separating gangue impurities in magnetic agglomerates and magnetic chains.

This invention discloses a secondary copper recovery treatment device for electrolytic copper foil wastewater, belonging to the field of multi-stage wastewater treatment and resource recovery. It includes a recovery treatment unit and a pretreatment unit. The recovery treatment unit comprises a shell with an internal cavity, a detachable cover plate mounted on the upper end of the shell, an insulating shaft rotatably connected to the center of the cavity, a hollow cavity inside the insulating shaft, and a liquid outlet connected to the hollow cavity. The pretreatment unit employs a dual chemical and physical synergy, weakening the solvation cage effect of hydrated ions under the assistance of a pulsed magnetic field, thus increasing the collision probability between the complexing agent and the complexed copper ions. Combined with a bidirectional flow distribution design, the hollow cavity directly replenishes high-concentration wastewater in situ to the upper and middle regions. This design effectively counteracts the concentration polarization in the upper and middle regions, thereby suppressing the "thick at the bottom, thin at the top" morphological deterioration caused by the ion concentration gradient.

This invention discloses a method for preparing anisotropic injection-molded magnets, comprising: a secondary orientation process in which pulsed magnetic field orientation and continuous electromagnetic field orientation are sequentially applied to molten magnetic powder during injection molding, enabling the magnetic powder to achieve effective orientation during the molten stage, thereby obtaining anisotropic injection-molded magnets with significantly improved orientation degree and magnetic properties. Magnetic property optimization: Secondary orientation reduces the problem of localized insufficient orientation, optimizing the magnetic properties of the magnet and improving the consistency of the magnetic powder arrangement inside the magnet. Secondary orientation reduces dependence on a single high-intensity magnetic field, reduces equipment energy consumption, and improves system operational stability. The method of this invention is applicable to various bonded magnet systems and has good versatility and engineering feasibility.

The utility model discloses a kind of magnetic field intensity detection devices of transcranial magnetic stimulator, including transcranial magnetic stimulator host computer, stimulating coil clap, head model, magnetic field intensity inductor, signal processing module and data processing unit, magnetic field intensity inductor is installed in head model and close to head model surface, magnetic field intensity inductor, signal processing module and data processing unit are sequentially electrically connected, stimulating coil clap can be close to head model surface and produce pulsed magnetic field, magnetic field intensity inductor is used to induct pulsed magnetic field and send magnetic field energy analog signal to signal processing module, signal processing module is used to convert magnetic field energy analog signal into magnetic field energy digital signal and send to data processing unit, data processing unit is used to record and store magnetic field energy digital signal, and generate magnetic field intensity detection result. The utility model can detect the performance of transcranial magnetic stimulator by detecting the pulsed magnetic field of stimulating coil, to ensure the safety of patient.

This invention provides a method for preparing synthetic rutile from ilmenite concentrate and the application of a pulsed magnetic field therein, belonging to the technical field of synthetic rutile preparation from ilmenite concentrate. Specifically, this invention applies a pulsed magnetic field to the ilmenite corrosion reaction during the preparation of synthetic rutile from ilmenite concentrate. The magnetic field enhances the dissolution and diffusion of paramagnetic oxygen, accelerating the cathode oxygen reduction reaction rate, thereby promoting the corrosion reaction and achieving efficient separation of titanium and iron. This invention can significantly enhance the ilmenite corrosion reaction process, achieving iron corrosion oxidation and efficient separation of titanium and iron at relatively lower temperatures and in a shorter time, effectively solving the problems of long reaction time and low corrosion efficiency in existing ilmenite corrosion processes.

This invention relates to the field of ink resistivity measurement technology, and discloses a method and control system for measuring the resistivity gradient of integrated black ink. The method includes: dispersing conductive carbon black and a fast-drying solvent in a high-speed disperser to obtain a percolated carbon black slurry; coating the percolated carbon black slurry onto a substrate, applying a pulsed magnetic field and calculating the resistivity gradient between the film surface and the substrate; when the resistivity gradient exceeds a preset threshold, calculating the dispersant injection flow rate and controlling a micro-pump to inject dispersant to achieve a shear rate within a set range, thus obtaining a coating slurry; calculating the thixotropic index of the coating slurry and calculating the set temperature values ​​for the first, second, and third temperature zones of the drying section; and obtaining a cured film through a curing process. This method achieves control from thixotropic protection and resistivity gradient reduction to rapid curing, realizing the rapid and uniform construction of the conductive network of integrated black ink and improving the uniformity of the film resistivity distribution.

The application relates to the technical field of semiconductor materials, and particularly discloses a high-purity copper-nickel-cobalt alloy target material for semiconductors and a preparation process thereof. The preparation process of the high-purity copper-nickel-cobalt alloy target material for semiconductors comprises the following steps: independently deep-purifying Cu, Ni and Co; atomizing and powdering high-purity Cu, high-purity Ni and high-purity Co respectively; applying a pulse magnetic field at 400-500 DEG C to perform orientation treatment; switching the pulse magnetic field to a direct-current magnetic field after the orientation treatment, and meanwhile performing discharge plasma sintering; and performing stress relief annealing on the sintered compact after cooling. The application independently deep-purifies each element, atomizes and powderizes and mechanically alloyizes to obtain pre-alloy powder, rapidly densifies through discharge plasma sintering, in-situ fixes an orientation structure, maintains a magnetic field in a cooling process to prevent orientation relaxation, and finally obtains a target material with fine-grained structure and strong <111> texture synergy.

The utility model relates to a kind of guardrail installation plant hole equipment of reducing consumables, mainly by punching mechanism, fixed mechanism and detection mechanism constitute modular system, detection mechanism uses annular pedestal to carry six independent probe units, each unit integration excitation coil, detection coil and phase analysis module, through the penetration of pulsed magnetic field concrete medium, detection coil captures the secondary magnetic field distortion signal generated by reinforcing bar, after micro-volt signal amplification, phase analysis module compares adjacent probe phase difference, real-time analysis reinforcing bar spatial coordinates and azimuth angle, this design breaks through the limitation of traditional single-point detection, utilizes annular array to synchronously obtain six radial cross-section magnetic field data, combined with the signal interference of concrete non-conductive characteristics is avoided, realize the millimeter level space avoidance of drill path and reinforcing bar distribution, compared with prior art, the device reduces reinforcing bar collision rate to 0.5% or less, drill loss reduces 60%, while improving drilling positioning efficiency reaches 40%, significantly optimizes construction cost.

The application discloses a mixed material input cavity for a pulse magnetic field klystron and an optimization method thereof. The mixed material input cavity comprises an inner conductor, a first outer conductor and a second outer conductor which are sleeved on the inner conductor. A drift tube cavity is formed between the outer wall of the inner conductor and the inner walls of the first outer conductor and the second outer conductor. An injection waveguide is formed between the first outer conductor and the second outer conductor. The injection waveguide and the drift tube cavity are communicated through an input cavity. The input cavity inner wall parts of the inner conductor, the first outer conductor and the second outer conductor are made of metal materials with different electric conductivities. The optimization method comprises optimizing the structure of the mixed material input cavity so that the response time of the metal materials with different electric conductivities to a magnetic field is as consistent as possible. The mixed material input cavity for the pulse magnetic field klystron aims to reduce microwave loss of injected microwaves and reduce eddy current loss.

The application discloses a high-toughness micro-alloyed magnesium alloy ingot preparation method, and at least comprises the following steps: a semi-continuous casting stage: a pulse magnetic field and gradient cooling coupling process is adopted, a pulse magnetic field is applied and a gradient cooling system is matched: wherein the strength of the applied pulse magnetic field is 0.1T-0.3T, and the magnetic field frequency is 50Hz-100Hz; the gradient cooling system makes the cooling rate of the upper part of the ingot be 20℃-30℃ / s, and the cooling rate of the lower part be 40℃-50℃ / s; based on the dynamic synergistic regulation of the pulse magnetic field and the gradient cooling system, segregation and edge-first solidification are inhibited, and the ingot core and surface organization homogenization is realized. The application adopts the pulse magnetic field and gradient cooling coupling process to dynamically disturb and homogenize the regulation of the melt solidification process, effectively breaks the temperature field and composition field unevenness caused by the traditional static solidification, significantly inhibits the intracrystalline and intercrystalline segregation, refines the coarse columnar crystal organization, and makes the strengthening effect of the micro-alloying element fully play.

This application provides a sterilization and preservation device and a refrigerator, comprising: a circulating air duct; a fan configured to drive air to flow within the circulating air duct; an inner liner having a storage cavity, an air inlet communicating with the storage cavity, and an air outlet; the circulating air duct communicating with the air inlet and the air outlet; wherein, when the fan is started, airflow enters the circulating air duct from the air inlet and enters the storage cavity from the air outlet; an infrared sterilization module disposed within the circulating air duct; and a magnetic field generating module disposed on the inner liner; the magnetic field generating module is configured to generate a pulsed magnetic field; wherein, in a high-efficiency sterilization mode, when the fan is started, the infrared sterilization module is turned on first, and the magnetic field generating module is turned on later or simultaneously with the infrared sterilization module.

This invention discloses an aging treatment method for Mg-Gd-Zr alloys, comprising the following steps: providing an extruded Mg-Gd-Zr alloy; aging the extruded Mg-Gd-Zr alloy at 220-230℃ for 6-8 hours under a pulsed magnetic field, followed by cooling to obtain an aged Mg-Gd-Zr alloy; wherein the pulsed magnetic field has a current of 1-5A, a frequency of 12-16Hz, and a duty cycle of 45-55%. This invention ages the extruded Mg-Gd-Zr alloy under pulsed magnetic field conditions, significantly enhancing the alloy's strength and ductility through the synergistic effect of electromagnetic force and Joule heating. The shorter aging time of this invention helps improve processing efficiency and reduce aging treatment costs.

The application discloses a copper-embedded multilayer board defect detection method and system based on eddy current thermal imaging and impedance spectrum fusion, relates to the technical field of multilayer board defect detection, and comprises the following steps: applying a high-frequency alternating pulse magnetic field to a copper-embedded multilayer board to be detected; continuously collecting thermal field cooling sequence images after pulse excitation, then extracting thermal diffusion coefficients of copper-embedded regions a and thermal field isotheral line distribution characteristics; using test probes of an automatic machine to contact copper-embedded blocks and corresponding network test points on the copper-embedded multilayer board to be detected, injecting a wideband sweep signal, obtaining impedance spectrum and extracting characteristic parameters; and a , thermal field isotheral line asymmetry, Z LF , R HF and Δ θ are constructed into a multi-dimensional feature vector, input into a fusion judgment model, and a judgment result of the copper-embedded multilayer board defect is output according to a preset multiple threshold. The application realizes non-destructive defect detection, and the micro-crack detection rate is about 97%, and the copper-embedded offset and interlayer short-circuit detection rate is 100%.

This invention relates to a heat treatment method for ZL205A alloy based on pulsed magnetic field-ultrasound synergistic control, belonging to the field of metallic material heat treatment. It solves the problems of difficulty in simultaneously improving strength and toughness, insufficient precision in precipitate control, and high residual stress in existing technologies for ZL205A alloy heat treatment. The method involves performing a step-wise solution treatment on the ZL205A alloy sample, applying a pulsed magnetic field during all or part of the holding stage of the solution treatment; quenching the solution-treated sample; and then placing the quenched sample in an aging furnace for aging treatment, simultaneously applying a pulsed magnetic field and ultrasonic vibration during the holding stage of the aging treatment, forming a synergistic environment of thermal field, pulsed magnetic field, and ultrasonic vibration field. This enables the application of ZL205A alloy castings with both high strength and high toughness in the aerospace and high-end equipment fields.

The application discloses an intelligent four-dimensional eye physiotherapy system and method, and relates to the technical field of eye physiotherapy.The system comprises a multi-source data acquisition module, a double-mode feature extraction module, an intelligent syndrome differentiation module, a physical field scheme decision module, a physiotherapy parameter dynamic programming module and a four-dimensional physiotherapy prescription generation module, wherein the intelligent syndrome differentiation module is used for carrying out multi-source information fusion on structured Chinese medicine symptom information, blood vessel quantitative features and thermal imaging quantitative features, and making a judgment based on a preset syndrome classification relationship; the physical field scheme decision module is used for determining a dominant physical field and at least one auxiliary physical field from a thermal physical field, a low-frequency pulse magnetic field, a specific spectrum light field and a micro-vibration sound field according to a current dominant Chinese medicine syndrome type; and the core design of multi-source information fusion and accurate syndrome type judgment is achieved, objective quantitative representation of Chinese medicine syndrome types and disease severity is realized, and a physiotherapy scheme is accurately matched with individual core pathogenesis.

The application relates to the technical field of battery state evaluation, and discloses a single battery state evaluation method, device, equipment and storage medium. In the method, a magnetization response evaluation method under the action of a static magnetic field is used to directly obtain the calculated magnetic susceptibility of a single battery and map the state of charge; then, a structural defect imaging method under the action of an alternating magnetic field is used to convert internal conductivity abnormalities into surface temperature distribution abnormalities by using eddy current heat effect, so that the single battery can be subjected to non-invasive spatial positioning and visual imaging; then, an ion dynamics evaluation method under the action of a pulse magnetic field is used to extract an open-circuit voltage relaxation time constant, so as to evaluate the battery health state; finally, a multi-source information fusion method is used to jointly infer the state of charge, the defect image and the relaxation constant, and output a high-confidence state evaluation result, so that the single battery can be comprehensively and accurately evaluated.

The application discloses a pulse magnetic field test method and system based on a MARX generator, and the pulse magnetic field test method comprises the following steps: a tested product mounting step, in which the tested product is mounted on a base; a current loop mounting step, in which two current loops are mounted on the base, and the two current loops are respectively located on two sides of the tested product; and a discharge test step, in which a pulse current wave is output by the MARX generator to the current loops to form a pulse magnetic field, so that the tested product is tested for a lightning indirect effect.

1. The name of the design product: pulse magnetic field therapeutic instrument (LGT-2650). 2. The use of the design product: equipment for rehabilitation external treatment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.