129results about How to "Magnetic field stabilization" patented technology

The invention relates to a high-energy consumption self-decoupling magnetorheological damper with damping force decoupling property and failure self-protection function. The damper not only has high energy consumption and output, but also can effectively prevent subsidence of magnetorheological fluid, therefore, the invention is suitable for civil engineering structures. The damper mainly comprises a master cylinder body (6), an auxiliary cylinder body (13), a main piston (8), two auxiliary pistons (23), a piston rod (25), and novel composite-structure energy accumulators (14 and 15). Permanent magnets (9) arranged in the main piston (8) and the two auxiliary pistons (23) can effectively prevent subsidence of magnetorheological fluid, and can still provide corresponding damping force under the condition of power supply failure to enhance the safety of the structure. Magnetic circuit guiding components improve the utilization factor of the magnetic field. A mechanical spring self-decoupling device is mainly operated on the condition that the damper is under low-frequency driving, thereby overcoming the disadvantage of low output of the damper under low-frequency driving.

The invention provides a magnetic composite fluid polishing device for the inner wall of a small thin pipe, and belongs to the field of polishing devices. The magnetic composite fluid polishing device for the inner wall of the small thin pipe comprises a support, a lead screw, polished rods, a polishing head support, a magnetic unit, a drive portion and a polishing portion. The polishing portion comprises a conveying pump, a magnetic composite fluid container and a workpiece seat. The output end of the conveying pump is connected to the magnetic composite fluid input end of a workpiece through a pipeline, the magnetic composite fluid output end of the workpiece communicates with the magnetic composite fluid container through a pipeline, the input end of the conveying pump is connected to the magnetic composite fluid container, and a complete loop is formed. In the device, a permanent magnet in the magnetic unit can rotate and can move left and right relative to the workpiece, and therefore a stable magnetic field can be generated, then Bingham fluid is formed by magnetofluid under the action of the magnetic field, shearing force is generated by the Bingham fluid, and the inner wall in an irregular shape of the workpiece is polished.

The invention provides a circumferential magnetic conduction structure of a Hall sensor. The magnetic conduction structure comprises an annular permanent magnet, a Hall chip, a circular ring sleeve and two magnetic conduction blocks, wherein the circular ring sleeve is made of a magnetic conduction material, and the annular permanent magnet is fixed on the inner wall of the circular ring sleeve; the two magnetic conduction blocks are positioned inside the annular permanent magnet, and a gap is formed between the external surfaces of the two magnetic conduction blocks and the internal surface of the annular permanent magnet; and the Hall chip is positioned between the two magnetic conduction blocks. By means of the circumferential magnetic conduction structure disclosed by the invention, a magnetic field is effectively focused at the inner side of the circular ring sleeve so that the magnetic field induced by the Hall chip is stable and has high magnetic intensity; and the circumferential magnetic conduction has the advantages of simplicity for processing and forming.

The invention discloses a low-cost anisotropic sintered permanent magnetic ferrite radial multi-pole magnetic ring near-net forming mould and a method. The forming mould mainly comprises magnetic yokes, ferrite magnetic powder, a core rod, neodymium-iron-boron magnetic blocks, and a mould wall; the inner side of the mould wall is filled with the ferrite magnetic powder; the core rod is arranged in the center of the inner side of the mould wall; the neodymium-iron-boron magnetic blocks are uniformly distributed on the circumference of the outer side of the mould wall; and the magnetic yokes are arranged on the outer sides of the neodymium-iron-boron magnetic blocks. The forming mould considering the difference of the shrinkage rates of one circle of a magnetic ring is adopted, so that the working surface side of the sintered blank magnetic ring has good cylindricity; the high-performance neodymium-iron-boron permanent magnetic blocks are adopted as orientation clamp magnetic field generation sources, so that the magnetic field is stable, and the orientation of the poles of the ferrite magnetic ring is ensured to be uniform; the advantages are more obvious in preparation of a series of products such as radial two-pole, four-pole, six-pole, eight-pole and ten-pole products and the like; and the forming mould is suitable for outer circular anisotropic radial multi-pole magnetic rings and inner circular anisotropic radial multi-pole magnetic rings, and has high universality.

The invention discloses a method of using an unmanned plane with an electromagnetic sucker to implement on/off line of an inspection robot. The method of using an unmanned plane with an electromagnetic sucker to implement on/off line of an inspection robot includes the steps: when the inspection robot is on line, putting the inspection robot on the electromagnetic sucker of the unmanned plane, utilizing the control circuit to control the electromagnetic sucker to be energized so as to generate a magnetic field to enable the electromagnetic sucker to suck the magnetic part of the inspection robot, so that the unmanned plane can fly to the on line point; after the inspection robot is on line stably, utilizing the control circuit to control the electromagnetic sucker to be disconnected with power supply, so that the unmanned plane is separated from the inspection robot and returns to the ground, wherein when the inspection robot is off line, when the electromagnetic sucker of the unmanned plane is not energized, the unmanned plane takes off and arrives below the inspection robot to contact the inspection robot, and the control circuit controls the electromagnetic sucker to be energized, and then the inspection robot is off line, and then the unmanned plane carries the robot to fly to the ground; and utilizing the control circuit again to control the electromagnetic sucker to be disconnected with power supply, that is, taking down the inspection robot from the unmanned plane.

The invention discloses a test method of Curie temperature of a ferromagnetic material. The test method is characterized in that a magnet is parallel placed on a sample tray of a thermal gravity-differential thermal integrated analyzer; the thermal gravity-differential thermal integrated analyzer with the magnet is used for measuring the mass of the ferromagnetic material; the placed magnet is used for adding a stable magnetic field for a to-be-tested sample put in the sample tray. The test method comprises the following steps: putting a ferromagnetic material sample subjected to primarily drying and impurity removing, and raising test temperature and recording the mass of the sample in real time to obtain the minimum mass of the sample; and further raising the test temperature and recording the mass of the sample in real time when the mass of the sample is minimum, wherein the mass of the sample is increased along with the raising of the test temperature until the hopping of the mass of the sample occurs, then the mass of the sample is not changed again; and recording the test temperature value at the moment, wherein the test temperature value is the Curie temperature of the ferromagnetic material. The test method can be used for very easily testing the Curie temperature of the ferromagnetic material.

The invention discloses a pair of magnetic therapy shoes and production technology thereof. The magnetic therapy shoes comprise uppers, insoles and soles, wherein each sole comprises an outsole and a midsole; each upper comprises a five-layer structure, the middle layer is high foaming EVA which is provided with waterproof cloth on the upper and lower surfaces, a leather surface is adhered to the surface of the waterproof cloth on the upper surface, and a lining is adhered to the surface of the waterproof cloth on the lower surface; magnetic sheets are adhered to each midsole; a layer of waterproof cloth is paved on each of the upper and lower surfaces of each midsole. The invention also discloses the production technology of the magnetic therapy shoes. The production technology comprises the steps of: 1, preparing the uppers; 2, preparing the magnet sheets; 3, preparing the soles; 4, assembling, specifically inducing fixing each sole on a machine rack, sizing the periphery of each upper uniformly, and sticking the periphery of each upper with the periphery of the corresponding sole by size, and thereby the magnetic therapy shoes is produced.

The invention discloses a high-precision dual-mass silicon micro-gyro device based on a tunnel magneto-resistance effect, and the device comprises upper and lower layers, wherein the upper layer is asilicon-sensitive structure, and the lower layer is a glass substrate structure provided with a metal electrode and a tunnel magneto-resistance detection module; the structure of the upper layer is bonded to the structure of the lower layer through anchor points and consists of two completely identical gyroscope substructures, a pair of support beams and a pair of anchor points; and the structureof the lower layer consists of the tunnel magneto-resistive detection module, a glass substrate, a driving electrode, a driving detection electrode, an orthogonal electrode, a coil input interface, acoil input electrode, a coil output interface, a coil output electrode, a common electrode and a signal lead. The invention proposes that the silicon micro gyroscope uses a miniature coil as an excitation mechanism having stable magnetic field, controllable field strength and high degree of integration, and at the same time, uses a differential tunnel magneto-resistance detection structure havingthe advantages such as strong resistance to common mode errors, high sensitivity and high measurement accuracy.

The invention discloses an annular magnet based on a ReBCO superconducting ring piece belonging to the technical field of superconducting magnet application. The annular magnet is composed of a plurality of identical unit annular field magnets uniformly distributed along the annular direction, wherein, the unit annular field magnets are obtained by alternately stacking N ReBCO superconducting ringsheets and N+1 insulating sheets, wherein N is a positive integer; ReBCO superconducting rings are D-shaped, and N + 1 insulating rings are the same size as N ReBCO superconducting rings. A low-temperature Dewar immersion type cool magnet has that advantages of high magnet current carry capacity, low heat leakage, compact structure and disassembly, and can generate a stable large-space magnetic field, and is widely used in the fields of medium and large Tokamak magnet, thermonuclear fusion reaction and the like.

The invention relates to a nuclear magnetic resonance superconducting magnet with a compact coil structure, which comprises a main coil 1-5, an adjusting coil 6-9, a shielding coil 10-12, an anti-electromagnetic interference coil 13-14 and a shimming coil 15-25. The diameter of a superconducting wire is gradually reduced from the main coil 1 to the main coil 5, and the current density is in a graded form. The shimming coil comprises axial coils Z0, Z1, Z2, Z3 and Z4 and radial coils X, Y, ZX, ZY, X2-Y2 and XY, the axial coils Z0, Z2 and Z4 are electromagnetically decoupled from a magnet coil composed of the main coil 1-5, the adjusting coil 6-9 and the shielding coil 10-12, and the axial coils Z0, Z2 and Z4 are electromagnetically decoupled from one another. The anti-electromagnetic interference coils 13 and 14 form a closed loop, so that the superconducting magnet can keep the magnetic field in the central region stable when being interfered by an external magnetic field.

The invention relates to the technical field of magnet therapy, in particular to a light magnetic ball and a preparation method thereof. The light magnetic ball comprises a ceramic hollow ball and a magnetic resin material layer attached to the outer surface of the ceramic hollow ball. The internal ceramic hollow ball is small in density and firm in structure, and can provide stable support for the magnetic resin material layer on the outer layer. The magnetic resin material layer is formed by mixing magnetic powder and resin, wherein the magnetic powder can generate a stable magnetic field toachieve magnetic therapy effect, and the resin can reduce foreign body sensation generated in the using process of the light magnetic ball, thereby effectively improving comfort degree in use. The light magnetic ball provided by the invention has the advantages of small density, firm structure, wear resistance, corrosion resistance and the like, can meet the demand for magnetic therapy when arranged on products such as quilts, greatly reduces the weight of the products, and is more comfortable to use.

The invention discloses a ballistic parameter-recording device. The device mainly comprises a magnet base (1), a magnet (2), a magnet-sealing cover (3), a recorder-sealing cover (4), a detector (5), a recorder circuit board (6), filler (7) and a recorder base (8). In the flying process of a shell, the recorder base (8) is kept fixed relatively at the position of the shell body, the magnet base (1) is driven by a rigid empennage to rotate, a high level-low level-high level jump process can take place each time when the magnet (2) passes the detector, the generated jump can be recorded by the recorder circuit board (6), at the same time, an accelerometer (9) starts to work, and the frequency and acceleration of the jump process within a certain period of time are recorded by a memory (10) in real time. The device can be widely applied, and can simultaneously record the flying time of the shell, the relative rotational speed of the shell and the empennage and the overload parameter in the flying process of the shell.

The high energy magnetic core array for biological magnetic field regulation is used for acting human body, animal or plant with simulating biological magnetic field to regulating abnormal biological magnetic field, eliminate diseases, promote growth and raise life quality. The present invention includes high energy magnets and base board and features that the high energy magnets are arranged on the base board to constitute an array of four circles and eight radials, with the high energy magnets in adjacent circles being in different polarity.