164 results about "Magnetic orientation" patented technology

The application discloses a method for preparing a metal organic framework film by magnetic field induction regulation control. The method comprises the following steps: vertically immersing a sheet carrier into a film forming solution of the metal organic framework film; placing a container provided with the film forming solution and the carrier into a uniform magnetic field; and standing for 4-24 hours to obtain the metal organic framework film prepared by the magnetic field induction regulation control. The metal organic framework film is a cobalt-based, nickel-based or iron-based metal organic framework film. The carrier material comprises alumina, porous carbon and porous organic material. The magnetic field direction is perpendicular to or parallel to the surface of the carrier. The metal organic framework film prepared by the application has excellent gas separation performance, and the film forming process is simple, convenient, easy to enlarge and popularize.

The invention discloses an ultrafast terahertz response magnetic field measurement method and system based on a linear magneto-optical conversion material, and the method comprises the steps: preparing a linear magneto-optical conversion heterojunction film which comprises at least one signal generation layer with a linear magneto-optical conversion characteristic and at least one signal emission layer with a strong spin-orbit coupling effect; placing the heterojunction thin film at the position of a magnetic field to be measured, and irradiating the heterojunction thin film by using femtosecond laser pumping pulse so as to enable the heterojunction thin film to radiate a terahertz signal; through the terahertz vector detection and rotation detection system, the positive and negative and the magnitude of terahertz signals radiated by the heterojunction film in three groups of orthogonal directions are detected, and the magnetic field direction and the magnitude of the magnetic field position to be detected are calculated based on the three groups of terahertz signals. The sensor has the advantages of being high in sensitivity, high in response speed, non-contact and the like, can achieve rapid detection of various vector magnetic fields such as stable, periodic modulation and sub-picosecond transient pulse, and has hundred-nanometer-scale spatial resolution capacity.

The invention discloses a dry type reactor turn-to-turn short circuit fault positioning method based on a magnetic field direction angle. Obtaining radial and axial magnetic field component data of an outer side designated area under different working conditions; dividing a measurement area according to a reactor structure and magnetic field distribution characteristics; screening optimal measurement areas under different working conditions based on the divided measurement areas and initial moment magnetic field components in the obtained radial and axial magnetic field component data; calculating a magnetic field direction angle of the optimal measurement area under different screened working conditions; making a sensor layout scheme according to the calculated magnetic field direction angles of the optimal measurement area under different working conditions and the change characteristics of the magnetic field direction angles of the measurement points under different working conditions, and determining each measurement point; fault positioning is realized by analyzing the magnetic field direction angle difference between the short-circuit working condition and the normal working condition of each measuring point. According to the method, the problems of insensitive response to the turn-to-turn short circuit fault of the inner layer encapsulation and low positioning precision of a traditional method are solved, and a high-reliability technical scheme is provided for fault detection of the dry-type air-core reactor.

The invention discloses a dry-type air-core reactor turn-to-turn short circuit fault detection method and system based on magnetic field direction angle change, and the method comprises the following steps: firstly, obtaining a plurality of operation conditions of a dry-type air-core reactor, including a normal operation condition and a turn-to-turn short circuit fault condition containing different short circuit positions; time sequence magnetic field vector data of a measurement point position is preset on the outer side; secondly, calculating a magnetic field direction angle of each measurement point according to the acquired data, and drawing a time sequence change curve of the magnetic field direction angle under a corresponding working condition; and finally, comparing the time sequence curves of the magnetic field direction angles of the measuring points under different working conditions, and judging whether a turn-to-turn short circuit fault occurs or not based on the deviation degree characteristics of the magnetic field direction angles of the turn-to-turn short circuit working condition and the normal operation working condition, thereby completing fault diagnosis. The weak magnetic field characteristic of turn-to-turn short circuit can be sensitively captured, the limitation of a traditional monitoring method is effectively overcome, and a powerful guarantee is provided for stable operation of the dry-type air-core reactor.

The invention provides a magnetic resonance guided charged particle beam radiotherapy device and an electromagnetic navigation parameter debugging method for target coordinates, and belongs to the technical field of radiotherapy devices. The system comprises a charged particle beam electromagnetic navigation device which comprises multiple stages of electromagnetic navigation coils, charged particle beams sequentially pass through the multiple stages of electromagnetic navigation coils, and parallel charged particle beams consistent with a magnetic resonance main magnetic field in direction are generated; the MR imaging device comprises an MR main magnetic field coil upper group and an MR main magnetic field coil lower group, and an imaging treatment area is formed between the MR main magnetic field coil upper group and the MR main magnetic field coil lower group. The electromagnetic navigation parameter debugging method comprises the steps of constructing a target cost function, optimizing electromagnetic navigation parameters based on an optimization algorithm without gradient information, and determining and outputting optimal navigation parameters. According to the invention, the charged particle beam parallel to the MR main magnetic field can be generated, the influence of Lorentz force on the charged particle beam is greatly reduced, the difficulty of positioning a tumor target region by the charged particle beam under the guidance of MR can be reduced, and the treatment accuracy is improved.

This application relates to an ion cyclotron antenna device, including a controller; a detection component electrically connected to the controller, the detection component being used to detect the direction of the magnetic field in real time; a rotating device electrically connected to the controller; and an ion cyclotron antenna connected to the rotating device. When the direction of the magnetic field changes, causing the magnetic field direction to no longer be perpendicular to the ion cyclotron antenna, the detection component immediately feeds back a signal to the controller. The controller compares the relative positional relationship between the antenna and the magnetic field, and then outputs a command to the rotating device, enabling the rotating device to drive the ion cyclotron antenna to rotate and adjust, so that the ion cyclotron antenna is once again perpendicular to the direction of the magnetic field. Through the coordinated work of the detection component, the rotating device, and the controller, the relative perpendicularity between the ion cyclotron antenna and the direction of the magnetic field can always be guaranteed, thereby effectively suppressing the generation of parallel electric fields, reducing the generation of sheath potential, reducing the impact of high-energy particles on the antenna, and extending the steady-state operation time of the antenna and the nuclear fusion device.

The invention discloses a bearing retainer production mold demagnetization device, and belongs to the field of mold demagnetization. The positioning bearing platform is fixedly arranged on the supporting rack and is used for bearing a bearing retainer production mold to be demagnetized; the full-coverage dynamic demagnetization module comprises a demagnetization coil assembly capable of linearly moving along the supporting rack, the demagnetization coil assembly moves to the position of the positioning bearing platform, and the magnetic field range of the demagnetization coil assembly can completely cover the geometric contour of the mold to be demagnetized; the demagnetization control unit is electrically connected with the demagnetization coil assembly and the demagnetization power supply, and is configured to trigger the demagnetization power supply to output an alternating magnetic field with preset parameters when the demagnetization coil assembly moves to completely cover the mold, and the alternating magnetic field has a constant amplitude and the direction of the alternating magnetic field is periodically reversed; and meanwhile, when the demagnetizing coil assembly reversely moves to be away from the mold by a preset distance, the demagnetizing current is attenuated to zero, and demagnetizing in a mode that the mold is away from the mold and attenuated is combined is achieved.

The application relates to the technical field of downhole operation of oil exploitation, in particular to a lost fish head detection device and method for taking and replacing a casing, the method comprising the following steps: by collecting the magnetic variable of a downhole probe at each sampling depth, a potential interference section is first determined; then, by combining the magnetic field gradient distribution and the horizontal magnetic field direction characteristics, the magnetic field change balance degree and the direction consistency are calculated, the stratum lithology and external interference are effectively removed, and the real lost fish head section is accurately locked; finally, the horizontal distance is calculated by using the magnetic field vector weighted summation, and the fish collecting strategy is output. The application aims to improve the accuracy of fish head positioning and the fish collecting success rate.

The present disclosure provides a magnetoresistive quadrant detector for use in a magnetic sensing device comprising a magnetic multi-turn sensor and an angle turn sensor, in particular, an angle sensor configured to provide 180° absolute angle measurements, such as an anisotropic magnetoresistive (AMR) angle sensor. The quadrant detector is formed of at least two magnetoresistive elements, preferably giant magnetoresistive (GMR) elements, which may be integrated to the multi-turn sensor die or provided on a separate die within the sensor package. The magnetoresistive elements are configured to provide a unique combination of resistance states for each quadrant of magnetic field direction. This quadrant information can then be used to remedy any ambiguities in the multi-turn measurement without needing 360° absolute angle information from the single turn angle sensor.

The invention provides a neodymium iron boron magnet and a preparation method thereof. The method comprises the following steps: obtaining neodymium iron boron magnetic powder; the neodymium iron boron magnetic powder is put into the mold, and the neodymium iron boron magnetic powder is in a loose loading state in the mold; applying an alternating-current oscillation attenuation magnetic field to the neodymium-iron-boron magnetic powder in the mold; orientation profiling is conducted in a preset orientation static magnetic field, a pressed blank is obtained, and the magnetic field direction of the preset orientation static magnetic field is perpendicular to the magnetic field direction of the alternating-current oscillation attenuation magnetic field; and post-processing the pressed blank to obtain the neodymium-iron-boron magnet. The magnetic field is attenuated through alternating-current oscillation, the magnetic field direction is perpendicular to the static magnetic field direction, agglomeration of the magnetic powder can be scattered, and meanwhile the influence of non-parallel magnetic lines of the magnetic field on magnetic powder orientation can be reduced.

Provided is a notebook computer in which desired resonance frequency and characteristics can be easily achieved with respect to a magnetic field antenna disposed so as to overlap with a palm rest of a case. A notebook computer is provided with: a case which includes a palm rest and is foldable; a magnetic field antenna that generates a magnetic field and is housed in the housing so as to overlap the palm rest in the magnetic field direction in which the magnetic field is generated; and a metal plate part that is disposed so as to overlap the magnetic field antenna in the magnetic field direction and that adjusts the resonance frequency of the magnetic field antenna, in which a hole pattern is formed, the hole pattern including at least one hole, and the metal plate part is disposed so as to overlap the magnetic field antenna in the magnetic field direction. And an eddy current suppression unit that suppresses an eddy current generated at the metal plate section due to the magnetic field generated by the magnetic field antenna.

Disclosed are a winding apparatus and a winding method, the winding apparatus includes: a winding needle, being configured to wind a winding material; a power supply assembly, being configured to be electrically coupled to the winding needle, so as to form current on an axis of the winding needle; and a magnet supply assembly, being configured to provide a magnetic field to the winding needle, a magnetic field direction intersecting the axis of the winding needle so that the winding needle generates an ampere force for resisting a deformation of the winding needle in the magnetic field when the winding material is wound. By the above method, the present application may reduce the deformation of the winding needle, reduce a defective rate of a winding product formed by the winding of the winding material, and improve quality of the winding product.

A flow rate sensor that can be integrated with a component of a fluid system includes a housing having fluid ports attached to the component and an internal cavity having a spindle and a rotor comprised of a plurality of paddles attached to a hub rotatably mounted on the spindle. The paddles rotate the hub around the spindle when a fluid is introduced into the cavity from a fluid port. A magnetic element attached to the hub rotates along with the rotor. A magnetic switch located in a sealed compartment is in magnetic alignment with the magnetic field produced by the magnetic element. Rotation of the magnetic element causes the magnetic switch to generate electrical signals corresponding to the rate of fluid flowing into the sensor from the component.

A method of manufacturing an Sm—Fe—N magnet includes filling a metal sheath with a magnet powder including an Sm—Fe—N compound as a main component and sealing the metal sheath, applying a magnetic field to the magnet powder sealed in the metal sheath, and magnetizing the magnet powder by magnetically orienting the magnet powder and aligning a direction of magnetic orientation in one direction, preliminarily rolling the magnetically oriented magnet powder sealed in the metal sheath to make the magnetically oriented magnet powder into a green compact, and pressurizing the green compact sealed in the metal sheath and densifying the green compact to form a magnet body, wherein the preliminary rolling is performed by lightly rolling the magnetically oriented magnet powder sealed in the metal sheath with a pressure smaller than a pressure for pressurizing the green compact.

This specification provides one or more embodiments of an antenna structure and a ring-shaped device. The antenna structure includes: a substrate ring; an antenna coil disposed circumferentially on the substrate ring, the antenna coil having a ring antenna sensing region and a planar antenna sensing region, the magnetic field direction of the ring antenna sensing region being arranged along the axial direction of the substrate ring, and the magnetic field direction of the planar antenna sensing region being parallel to a plane perpendicular to the axial direction.

The present application relates to a kind of terahertz emitter and its amplitude regulation method, belong to terahertz regulation field, the terahertz emitter includes from bottom to top sequentially stacked substrate, ferromagnetic layer, non-ferromagnetic layer and antiferromagnetic layer, or including from bottom to top sequentially stacked substrate, antiferromagnetic layer, non-ferromagnetic layer and ferromagnetic layer, can be changed by the direction of applied magnetic field, applied current or applied electric field to the amplitude regulation of above-mentioned terahertz emitter, to change the direction of applied magnetic field, applied current or applied electric field to the amplitude regulation of above-mentioned terahertz emitter, so that the present application designs a kind of terahertz emitter of new structure, and corresponding amplitude regulation method is designed for the terahertz emitter, can realize the efficient regulation of terahertz amplitude.

A system adapted to detect rotation of at least two spray arms of a household appliance spaced along a longitudinal axis of the appliance includes a first detection magnet, a second detection magnet and a magnetic sensor. The first detection magnet is arranged on a first spray arm of the at least two spray arms. The second detection magnet is arranged on a second spray arm of the at least two spray arms. A magnetic field direction of the second detection magnet is different from a magnetic field direction of the first detection magnet. The magnetic sensor is arranged in the household appliance and is adapted to sense a motion status of the first detection magnet and the second detection magnet.

A rotation angle detection device comprises a magnet attached to one of a first member and a second member that is rotatably supported by the first member, and a magnetic sensor attached to the other of the first member and the second member. The first member has a first rotation axis extending in the Z-direction, and the second member has a second rotation axis that is parallel to the first rotation axis. The second member rotates about the first rotation axis in a first angle interval and rotates about the second rotation axis in a second angle interval that is contiguous with the first angle interval. The magnetic sensor detects the direction of the magnetic field in a plane orthogonal to the Z-direction. The magnetic sensor is spaced away from the center of the magnet in the Z-direction.

The invention provides a magnetomotive type small molecular group water generator and a water heater. The magnetomotive type small molecular group water generator comprises a cylindrical shell and a main body arranged in the shell, a water inlet is formed in the top of the shell, and a water outlet is formed in the bottom; the main body comprises a main rotating shaft arranged in the axial direction of the shell, a mounting frame is arranged on the side face of the main rotating shaft, a magnet is arranged on the mounting frame, and the magnetic field direction of the magnet is perpendicular to the axial direction of the shell; and the mounting frame can rotate by taking the main rotating shaft as a shaft. According to the magnetomotive type small molecular group water generator and the water heater, the number of magnets can be reduced, the structure is simple, the cost is low, the action frequency and action time of a water body and a magnetic field can be increased, then the generation rate of small molecular group water is increased, and the small molecular group water can rapidly achieve skin repairing, water supplementing and wrinkle resisting.

This invention discloses a magnetic field-excited electromagnetically induced transparency-like device and method. The device includes two opposing FR-4 dielectric substrates and a metal-etched resonant structure fixed to the surface of the FR-4 substrates. The metal resonant structure includes a copper double U-shaped ring resonant structure and a double circular ring resonant structure. Both the double U-shaped ring resonator and the double circular ring resonator are excited by incident electromagnetic waves. The incident electric field direction is symmetrical to the structure, and the incident magnetic field direction is perpendicular to the surface of the dielectric substrate. Both the double U-shaped ring structure and the double circular ring structure are excited by the incident magnetic field, but with different coupling strengths, forming a bright-mode-bright-mode coupling. This invention features a bright-mode-bright-mode channel coupling method with simultaneous magnetic field excitation. By using two resonant structures with different coupling strengths to the electromagnetic field, a two-layer electromagnetically induced transparency-like device with large group time delay and high sensitivity is obtained.

This application discloses a magnetic circuit structure and a relay. The magnetic circuit structure includes an armature assembly and multiple coil assemblies. The multiple coil assemblies include a first coil assembly and a second coil assembly arranged at intervals along the X-axis. When energized, the first and second coil assemblies generate magnetic fields in the same direction. When the first and second coil assemblies are energized in the forward and reverse directions, they can drive the armature assembly to move linearly along the X-axis, enabling the armature assembly to form multiple magnetic pole surfaces with the first and second coil assemblies respectively. The armature assembly includes an armature element, a permanent magnet, and a magnetic conductor. The armature element is fixed to a first magnetic pole of the permanent magnet, and the magnetic conductor is fixed to a second magnetic pole of the permanent magnet. The first and second magnetic poles are arranged oppositely and have opposite polarities. The magnetic conductor is located between the first and second coil assemblies and can form magnetic pole surfaces with the first and second coil assemblies respectively.

The invention discloses a geomagnetic background field dynamic modeling method and system, and the method comprises the steps: anchoring N observation points in a to-be-modeled region, taking the N observation points as graph nodes, obtaining the neighborhood sub-graphs of the N graph nodes, obtaining the normalized single-point deviation of K neighborhood nodes, obtaining the graph average deviation of the neighborhood sub-graphs, and carrying out the modeling of the K neighborhood nodes. Obtaining a dynamic deviation threshold value of the neighborhood node, comparing the normalized single-point deviation of the neighborhood node with the dynamic deviation threshold value, and anchoring the neighborhood node which has the same magnetic field direction as the abnormal node and is closest to the abnormal node in the neighborhood sub-graph as a substitute modeling node; according to the method, the anomaly recognition process depends on the sorting relation between the space and the magnetic field in the local neighborhood, the adaptability of abnormal node recognition is improved in the stable background field area, the spatial continuity of modeling nodes is maintained while interference influences are eliminated, and the consistency of the geomagnetic background field modeling process is guaranteed.

In one aspect, an angle sensor includes a first linear sensor and a second linear sensor. A first magnetic-field direction of a target magnet measured by the first linear sensor is substantially equal to a second magnetic-field direction of the target magnet measured by the second linear sensor. The first linear sensor, the second linear sensor and the target magnet are on an axis. The angle sensor determines an angle of a magnetic field.

The embodiment of the utility model provides a switching device. The switching device comprises an arc extinguish chamber; the static contact is arranged on one side of the arc extinguish chamber; the moving contact is arranged on one side opposite to the static contact and is suitable for moving between an opening position and a closing position, the moving contact abuts against the static contact at the closing position, and the moving contact is separated from the static contact at the opening position; the permanent magnet is arranged at a position adjacent to the moving contact, the magnetic field direction of the permanent magnet and the direction of an electric arc generated during the separation of the moving contact and the static contact are in the same plane, and the permanent magnet is suitable for guiding the electric arc to move towards the magnetic field center of the permanent magnet during the movement of the moving contact and the static contact from the closing position to the opening position; and the electromagnet assembly is arranged in an arc running channel area on one side of the arc extinguish chamber and is suitable for guiding the electric arc guided by the permanent magnet to further move towards the arc extinguish chamber. In this way, the non-polarity wiring requirement can be met, and the opening arcing time is effectively shortened.

A three-axis magnetic field detection device includes a magnetic field conversion unit for generating a stray field having a magnetic field direction according to a magnetic field direction of an outer magnetic field using magnetic particles, a magnetic field measurement unit for measuring a magnetic field direction with respect to an X-axis magnetic field and Y-axis magnetic field in relation to the outer magnetic field, and a magnetic field detection unit for detecting the X-axis magnetic field, the Y-axis magnetic field and the Z-axis magnetic field based on the stray field and the measured magnetic field direction.

The invention relates to a device and a method for preparing an electromagnetic shielding composite material by inducing uniform orientation of a nano material based on a damped oscillation pulsed magnetic field. The method comprises the following steps: cleaning a glass rod and a mechanical stirring rod, and drying for later use; uniformly spraying a release agent on the mold for later use; s3, fully mixing the component A and n-hexane to obtain a mixed solution M; s4, adding FCI nanoparticles into the mixed solution M to obtain a uniformly dispersed mixed solution N; s5, adding a component B into the mixed solution N to obtain a mixed solution Y; s6, the mixed solution Y is poured into a mold coated with a release agent, and a pulsed magnetic field generator is used; and S7, the temperature of the drying box is increased for curing. The direction of a magnetic field is periodically reversed by a high-frequency oscillation component, so that a nano material is uniformly dispersed in a matrix, and monopole aggregation is avoided; the high-amplitude pulse component drives the nano material to finish rapid orientation in a short time, so that the efficiency is remarkably improved; the periodic effect of the pulsed magnetic field can avoid local short-time temperature rise and prevent the material from generating bubbles.

The present application relates to the technical field of iron core riveting equipment in relay, and discloses a device for riveting the iron core of a relay, which comprises a connecting body, a movable shaft core movably sleeved in the middle part of the inner cavity of the connecting body, a return spring transmissionally connected between the top end of the movable shaft core and the bottom end of the connecting body, a control module fixedly sleeved in the middle part of the outer surface of the connecting body and communicated with the middle part of the inner cavity of the connecting body, and a stamping member fixedly installed at the bottom end of the movable shaft core and extending to the bottom of the connecting body. The device for riveting the iron core of a relay is provided with the control module and the structure thereon, and the reverse force of the riveting punch in downward extrusion and cutting of the top end of the iron core can make the control module move correspondingly, and the direction of the magnetic field generated by the electromagnetic coil can be changed in a specific time period to apply the impact power of downward movement to the riveting punch, so that the petal-shaped structure of the top end of the iron core is flattened.

A method for determining an approach of a person toward a transportation vehicle, a computer program, an apparatus, and a system. In response to UWB technology or other radio-based distance systems being used for the Kessy access, the distance information relating to a user is gathered. In response to the access device containing an acceleration sensor, the movement sequence relating to the distance information is analyzed. The magnetic orientation of a transportation vehicle is known when the transportation vehicle is parked, and this information is included in the analysis. In the course of the calculation, directional vectors are included in the approach detection, and the individual positions are easily calculated.

The application relates to the technical field of servo motor control, and provides an initial electric angle self-calibration method, device and storage medium for servo motor control. The method comprises the following steps: a controller controls a power circuit to inject a preset direct-current excitation current into a winding of a servo motor, so as to generate a fixed-direction stator resultant magnetic field, and a rotor permanent magnet is dragged and aligned to the fixed-direction stator resultant magnetic field; after judging that the rotor is aligned stably, an aligned mechanical angle output by a magneto-electric encoder is read; an electric angle offset between an installation zero point of the magneto-electric encoder and an electric zero point of the servo motor is calculated and obtained; the electric angle offset is stored in a nonvolatile memory as a control parameter, and initial electric angle self-calibration is completed; after the self-calibration control flow is completed, real-time electric angles used for performing magnetic field orientation control are solved in real time based on the electric angle offset stored in the nonvolatile memory; and the controller performs magnetic field orientation control on the servo motor based on the real-time electric angles.