53 results about "Magnetic intensity" patented technology

The invention provides a spacecraft magnetic moment measurement method and system based on a four-point method, and the method comprises the steps: controlling a spacecraft to rotate a circle after a plurality of magnetometers are radially arranged at the geometric center height of the spacecraft, and measuring the magnetic intensity values corresponding to four preset measurement points through the plurality of magnetometers; calculating a plurality of key magnetic moment values according to the magnetic intensity values and the measurement spacing values corresponding to the four measurement points; based on the multiple key magnetic moment values, the magnetic core height of the spacecraft is obtained through calculation; adjusting the arrangement height of the plurality of magnetometers to the magnetic core height of the spacecraft; and controlling the spacecraft to rotate for a circle, and obtaining a magnetic moment measurement value of the spacecraft according to the magnetic intensity readings corresponding to the magnetic core heights of the plurality of magnetometers. According to the scheme provided by the invention, the equatorial plane positioning basis of the near-field method can be adjusted from the geometric center of the spacecraft to the magnetic core, the magnetic moment is accurately measured under the condition that the magnetism in the spacecraft is relatively dispersed, and the measurement precision and reliability of the magnetic moment of the spacecraft are improved.

The utility model belongs to the field of magnetic measurement equipment, and provides a magnetic shielding cylinder for magnetometer calibration, which comprises a cylinder body, the cylinder body comprises two double-layer cylinder shells which are butted and matched left and right, the shaft end of each double-layer cylinder shell is provided with a channel, and each double-layer cylinder shell comprises an inner-layer cylinder shell, an outer-layer cylinder shell, an inner butting port, an outer butting port and a sealing plate, a reversing insertion group used for reversing the wire direction is arranged in the barrel body, the reversing insertion group comprises a left insertion piece and a right insertion piece, the opposite ends of the left insertion piece and the right insertion piece are provided with an upper insertion opening and a lower insertion opening, and two vertical channels are formed in the positions of the upper insertion opening and the lower insertion opening after the left insertion piece and the right insertion piece are connected in an inserted mode. According to the invention, the two double-layer cylindrical shells which are butted left and right are adopted, so that the double-layer cylindrical shell can be conveniently opened and closed, only two channels of four channels which are originally required can be communicated with external equipment by using the reversing inserting group in the double-layer cylindrical shell, the magnetic intensity measurement error can be reduced, and the double-layer cylindrical shell is reasonable in design, simple in structure, relatively high in practicability and suitable for large-scale popularization.

The utility model discloses an air drilling rock debris sorting device which comprises a crusher used for crushing rock debris so as to reduce the particle size of the rock debris; a plurality of blanking positions are sequentially arranged on the blanking platform at intervals in the first direction; the magnetic suction roller is located above the blanking platform and can rotate in the circumferential direction and move in the first direction; the magnetic suction roller is provided with an initial position located under a discharge port of the crusher, and when the magnetic suction roller is located at the initial position, the magnetic suction roller can adsorb rock debris particles crushed and falling from the crusher to the outer wall of the magnetic suction roller; in the process that the magnetic attraction roller moves in the first direction from the initial position, the magnetic force of the magnetic attraction roller is in a decreasing trend, so that the rock debris particles adsorbed by the magnetic attraction roller fall down according to the magnetic force and are distributed to different blanking positions, the rock debris particles are sorted according to the magnetic intensity, operation is convenient, and the sorting efficiency of the magnetic rock debris is improved.

The invention discloses an active and passive combined zero magnetic device and a design method, and belongs to the field of magnetic shielding. The active and passive combined zero magnetic device comprises a passive shielding cabin composed of multiple layers of permalloy, and an equal-interval structure is arranged between every two adjacent layers; provided is a demagnetization system. The permalloy has high magnetic permeability, when a magnetic field encounters the permalloy with high magnetic permeability, magnetic field lines tend to spread along a path with higher magnetic permeability, namely walk along a permalloy layer instead of penetrating through a material, so that the environmental magnetic field is further reduced, a near-zero magnetic field environment is realized by designing a multi-layer permalloy cabin structure, and the performance of the magnetic field is improved. The demagnetizing coil is wound on the inner side wall and the outer side wall of the permalloy cabin body, and the demagnetizing coil is communicated with the external demagnetizing equipment through the demagnetizing interface at the end part of the demagnetizing coil, so that the amplitude of the demagnetizing current is gradually attenuated to the demagnetizing coil, and the permalloy cabin body is demagnetized; and the magnetization intensity of the material caused by the influence of the external environment and irresistible stress in the processing process can be weakened through the demagnetizing coil.

A plastic-coated rotor comprises a magnetic steel, a first shell is attached to the bottom wall and the outer wall of the magnetic steel, the first shell extends to the inner side of the bottom wall from the top end of the outer wall, a second shell is attached to the top wall and the inner wall of the magnetic steel, a shaft hole is formed in the second shell, and a shaft hole is formed in the shaft hole. A plurality of grooves are formed in the peripheries of the top and the bottom of the shaft hole at intervals. According to the plastic-coated rotor, the first housing is attached to the outer wall and the bottom wall of the magnetic steel, the first housing is used for protecting the magnetic steel, and because the first housing is attached to the magnetic steel, the surface magnetic intensity of the first housing is ensured, and the torque limit of the rotor is enhanced; the top of the outer wall of the magnetic steel and the first shell on the inner side of the bottom wall are in smooth transition with the magnetic steel, so that an anti-falling effect is achieved, plastic coating clamping can be realized in the subsequent plastic coating process, and edge warping and seam opening are prevented; grooves are formed in the peripheries of the top and the bottom of the shaft hole of the second shell at intervals, and the injection molding effect of the second shell can be improved.

The utility model relates to the technical field of permanent magnet brakes, in particular to a high-magnetism transverse permanent magnet brake which comprises a shell cavity and a permanent magnet unit, a coil is arranged in the shell cavity, and the permanent magnet unit is embedded in the end face of one side of the shell cavity. The piezomagnetic plate is in butt joint with the shell cavity, and the outer edge of the piezomagnetic plate is in compression joint with the permanent magnet unit; the brake disc rotor is used for being connected with a motor rotating shaft; the movable plate is arranged between the brake disc rotor and the shell cavity, and the movable plate and the brake disc rotor are connected into an integrated structure; the axis of the permanent magnet unit points to the movable plate, so that the coil is powered off, and the movable plate gets close to the shell cavity. By changing the mounting position of the permanent magnet, the distance between the permanent magnet and the movable plate is shortened, the braking magnetic strength is ensured, and a more reliable braking effect is achieved.

The utility model provides an equipment protection device, and the device comprises a first part which is provided with a first stress detection module and a plurality of magnets; the second part is provided with a second stress detection module, a magnetic intensity control module and a plurality of magnetic suction coils; the magnetic intensity control module is in communication connection with the first stress detection module and the second stress detection module. The first stress detection module is used for detecting the value of pressure applied to the first component; the second stress detection module is used for detecting the value of pressure applied to the second component; and the magnetic intensity control module is used for controlling the magnitude of current flowing through each magnetic attraction coil according to the pressure values detected by the first stress detection module and the second stress detection module so as to control the magnitude of adsorption force between each magnetic attraction coil and the corresponding magnet. The adsorption force can be controlled according to the stress borne by the first component and the second component, and equipment falling caused by insufficient adsorption force between the first component and the second component is avoided.

The invention relates to the field of digital media, in particular to a shooting device for digital media art design, which comprises a triangular telescopic bracket, a supporting rod, a holder shell and a rotating ball, a cylinder is in sliding fit in the holder shell, a locking knob is rotatably connected to the side wall of the holder shell, a clamping assembly is arranged on the locking knob, and the rotating ball is arranged on the triangular telescopic bracket. A plurality of arc-shaped blocks are fixedly connected to the top of the cylinder, magnetic sliding blocks are arranged in the arc-shaped blocks in a sliding fit mode, suction cups are fixedly connected to the arc-shaped blocks, a plurality of transmission cavities are formed in the cylinder, piston plates are arranged in the transmission cavities, connecting rods are fixedly connected to the top ends of piston rods, and sliding rheostats are arranged in the transmission cavities. Electromagnets are fixedly connected to the tops of the transmission cavities, and driving assemblies are arranged at the bottoms of the transmission cavities. According to the invention, the rotating ball rotates to cause the pressure change in the sucker, the magnetic intensity change of the corresponding electromagnet is controlled to apply reverse tension to the rotating ball, the rotating ball is prevented from rotating slightly due to the dead weight of the shooting device, and the stability of the target angle of the shooting device is improved.

The utility model discloses a motor internal winding positioning assembly, particularly relates to the technical field of positioning assemblies, and comprises a base, a connecting assembly is arranged on the base, the connecting assembly comprises a rotor tray arranged in the middle of the base, the rotor tray is rotatably connected with the base, and a plurality of winding columns are distributed on the outer side of the rotor tray. And a plurality of protection plates are arranged on the outer side of the rotor tray. By arranging the connecting assembly, a wire group is wound on the wire winding stand columns, wires are combed through the wire winding stand columns, the wires can be effectively prevented from being wound together, meanwhile, by arranging the limiting holes, the wire winding stand columns can be easily installed on the base to be positioned, and the wire winding stand columns can be conveniently arranged according to requirements. The number of the winding stand columns is increased or decreased, the function of adjusting the magnetic conduction intensity is achieved, wires are wound on the winding plates, the wires on the winding stand columns correspond to magnetic conduction channels formed when the wires on the winding plates are powered on, and the stability of the rotor tray during rotation is ensured.

The invention belongs to the technical field of magnetic field shielding of transformer substation robots, and particularly relates to a magnetic field shielding device of a transformer substation robot and the transformer substation robot. The mounting seat is provided with a containing cavity used for mounting a to-be-shielded electronic module, the magnetic field detection mechanism comprises an X-axis detection antenna assembly, a Y-axis detection antenna assembly, a Z-axis detection antenna assembly and a magnetic field processing controller, and the magnetic field processing controller is mounted in the containing cavity. While the electromagnetic protection cost is reduced, the change of the amplitude of the resultant magnetic field can be detected, electromagnetic shielding is performed when the electromagnetic intensity is high, and electromagnetic protection at the top is canceled when the electromagnetic intensity is low, so that the influence of electromagnetism on the to-be-shielded electronic module can be effectively prevented; and the influence of electromagnetic protection on the wireless communication function of the robot can be reduced, and the electromagnetic protection and daily use requirements of the transformer substation robot are met.

The application discloses an outer vacuum obtaining and magnetic shielding device for ground testing of a hydrogen atomic clock, comprising an outer vacuum preparation mechanism, wherein the outer vacuum preparation mechanism comprises a two-stage vacuum pump set, the two-stage vacuum pump set comprises a rotary vane molecular pump and a diaphragm oil-free mechanical pump, the two-stage vacuum pump set further comprises a vacuum gauge, a magnetic shielding cover, a pipeline, a vacuum valve one, a vacuum valve two and a magnetometer; the molecular pump and the mechanical pump are connected in series, and the mechanical pump serves as a front-stage pump. The application integrates zero magnetic treatment and environment control functions on the basis of a traditional vacuum pump set, is suitable for spacecraft assembly testing environment, meets severe testing conditions of the hydrogen atomic clock, is convenient to maintain, is suitable for transportation, can realize real-time measurement and control of vacuum degree and magnetic intensity, can realize rapid pressure relief testing of the hydrogen atomic clock in the device, verifies performance indexes of the hydrogen atomic clock under extreme environment, and is a necessary device for ground testing of next-generation spaceborne precise time and frequency instruments.

The utility model discloses a device of inducing magnetic filler to orient in carbon fiber composite material belongs to composite material preparation technical field. The device includes two equal size, equal surface magnetic intensity's permanent magnet, hole stainless steel support frame and stainless steel round bar. The support frame sets the circular hole, and the upper and lower side round bar restricts the permanent magnet to form the inhomogeneous magnetic field, and the middle round bar bears the composite material mould. The diameter of stainless steel round bar is less than the hole diameter, can adjust the permanent magnet spacing and change the magnetic field intensity, and the permanent magnet is high -temperature -resistant material, is suitable for high -temperature solidification environment. The device passes through the magnetic field and induces the filler such as magnetic boron nitride to orient in the composite material perpendicular to the carbon fiber direction, solves the problem of the mechanical property decline caused by traditional high filler amount, significantly improves the thermal conductivity under the low filler content, and retains the material mechanical strength. Simple structure is adjustable, and adapts to different size composite material preparation, and has practicality and industrial application potential.

The adjustable and closable electric control permanent magnetic field device comprises a permanent magnet and is characterized in that an electromagnet is fixed on the outer ring of the permanent magnet, a magnet exciting coil is wound on the electromagnet, the permanent magnet is demagnetized firstly, then after the device is transported and installed, a strong pulse power supply is connected to the magnet exciting coil, the permanent magnet is magnetized by the electromagnet, and the permanent magnet is demagnetized by the electromagnet. After magnetizing is completed, a strong pulse power supply is cut off, no current input of the electromagnet is kept, the permanent magnet continuously generates a stable permanent magnetic field, during magnetizing, a constant excitation magnetic field is achieved by outputting constant current, the higher the current is, the higher the magnetic field intensity is, different magnetizing intensities, online magnetizing and demagnetizing are achieved by adjusting different currents, and the higher the magnetizing intensity is achieved by magnetizing through the strong pulse magnetic field. The magnetizing and demagnetizing intensity is adjusted through the magnet exciting coil, the current is adjusted through the magnet exciting coil, then the magnetizing and demagnetizing intensity is adjusted, non-magnetizing transportation and installation are achieved, and transportation equipment and on-site use equipment are not affected.

The invention belongs to the technical field of ore crushing processing, and relates to a sensor technology-based iron removal detection control system for ore crushing, which is characterized in that the magnetic field intensity and the rotating speed of an electromagnetic roller are set according to a magnetic intensity distribution field of a target batch of materials collected by a metal detector; the ferromagnetic adsorption load is detected in real time through the pressure sensor array in the ferromagnetic crushed material adsorption process of the electromagnetic roller, when the electromagnetic roller is fully loaded, the scraper iron unloading mechanism is started to clean the ferromagnetic crushed materials adsorbed on the inner wall, and the guide rail grate sieve is triggered to filter out the ferromagnetic crushed materials after cleaning is completed; in the filtering process, the vibration amplitude and the inclination angle of the guide rail grate screen are dynamically adjusted according to the relative material output ratio of the guide rail grate screen, the material separation state of the grate screen is monitored through a visual recognition device, and when qualified ore and ferromagnetic crushed aggregates are recognized to be in a complete separation state, an iron removal stop signal is fed back to a control unit; and the ore iron removal precision and efficiency are improved.

This invention provides a method and system for destacking stamped automotive beams based on dual-dimensional magnetic force control. The method includes acquiring workpiece parameters of the workpiece to be destacking; determining the number of magnets to be activated according to the workpiece length in a preset magnet quantity mapping rule; and determining a target magnetic force intensity level according to the workpiece thickness in a preset magnetic force intensity mapping relationship. It then determines whether the workpiece meets the linkage condition. If the linkage condition is met, the number of magnets to be activated is adjusted to the linkage quantity value, and the target magnetic force intensity level is adjusted to the linkage intensity level. Otherwise, the determined number of magnets to be activated and the target magnetic force intensity level remain unchanged as the final control parameters. Based on the final control parameters, the corresponding number and position of magnets are activated, and the magnetization intensity of the activated magnets is adjusted to the output value corresponding to the target magnetic force intensity level. This effectively overcomes a long-standing technical bottleneck in the industry.

The utility model relates to the technical field of oil well logging, and discloses a novel well logging headstall structure which comprises a headstall body, and a dynamic protection mechanism is arranged on the outer side of the headstall body in a sleeved mode. The dynamic protection mechanism comprises a groove ring cylinder, the groove ring cylinder is arranged on the outer side of the headstall body in a sleeving mode, and a plurality of inclined rods are annularly distributed on the outer side of the groove ring cylinder at equal intervals. According to the novel well logging headstall structure, through cooperation of the headstall body and the dynamic protection mechanism, if the inner wall changes in the protection well logging period, the pressure sensor (set to be a fixed value) senses the change of acting force and sends an instruction to the control module in the box body, and then the control module instructs the electromagnet to adjust the magnetic intensity; the repulsive force of the electromagnet to the magnetic attraction piece is controlled to be a fixed value, the headstall body is sleeved with the groove ring cylinder, the sliding strip limits the sliding groove to prevent rotation, then the two sides are sleeved with the two conical cylinders, the second bolts penetrate through the conical cylinders and are in threaded connection with the groove ring cylinder, and operation is easy.

The utility model discloses a conveying device for magnetic core processing, which comprises a first conveying belt and a second conveying belt, the second conveying belt is arranged on one side of the first conveying belt side by side, a third conveying belt is erected above the first conveying belt and the second conveying belt, and the third conveying belt comprises a machine frame and a material conveying belt. A conveying belt is driven to move to convey materials through a rotary drum arranged on the machine frame, an electromagnetic plate is installed on the machine frame on the inner side of the conveying belt, the electromagnetic plate is close to the direction of the first conveying belt and the second conveying belt, an electromagnetic device electrically connected with the electromagnetic plate is installed on the machine frame below the conveying belt, and the electromagnetic plate adsorbs a magnetic core on the first conveying belt across the conveying belt. The magnetic core is transferred to a second conveying belt; through the synergistic effect of the electromagnetic plate and the electromagnetic device, the magnetic cores on the first conveying belt can be accurately adsorbed, the magnetic intensity is flexibly controlled by adjusting the magnitude of current, the magnetic core transfer device adapts to the magnetic cores of different sizes and weights, and the transfer precision and efficiency are remarkably improved.

The invention belongs to the technical field of magnetic materials, and relates to a neodymium iron boron composite magnet and a preparation method thereof. The composite magnet is in a cylinder shape and has a concentric circle structure with the circle center as the center point, and the concentric circle structure comprises an iron-based soft magnetic material layer located in the center area; the outer layer surrounds the iron-based soft magnetic material layer and is formed by stacking the iron-based soft magnetic material layer in a layered manner in the radial direction of the cylinder; the outer layer is composed of one or more neodymium iron boron material layers, each neodymium iron boron material layer comprises one or more neodymium iron boron materials, and the outer layer comprises two or more neodymium iron boron materials; the easy magnetization axes of the neodymium iron boron crystal grains in the outer layer are distributed in the radial direction. According to the composite magnet with the layered concentric circle structure, the heterogeneous magnetic powder is stacked and regularly combined in the pressure direction to prepare the composite magnet with the layered concentric circle structure, and better surface magnetic intensity can be obtained.

The utility model relates to the technical field of magnetic couplers, and provides a magnetic coupler inner magnetic rotor magnetism detection device which comprises a base, a speed reducer unit, a measuring unit and an inner magnetic rotor rotating unit. The inner magnetic rotor rotating unit comprises a driving shaft, a bearing and a coupling shaft; the driving shaft is fixed with the shaft through a coupling; the driving shaft and the bearing are mounted on the bearing bracket; the coupling shaft is connected with the driving shaft; the coupling shaft is used for installing a tested inner magnetic rotor; the measuring unit comprises a position sensor, a data collector and a detection device stator; the position sensor comprises a shading disc and a photoelectric switch; the photoelectric switch is fixedly mounted outside the speed reducer; the shading disc is arranged at the end part of the shaft and strides across the photoelectric switch; and a notch is formed in the outer side of the shading disc. According to the utility model, overall measurement can be realized, the measurement is convenient, the measurement efficiency is improved, and the magnetic intensity of magnetic blocks of inner magnetic rotors with different specifications can be measured.

To provide a method for producing a magnetic viscosity fluid device in which a variation (tolerance) of a rate (magnetic particle content) of magnetic particles in a magnetic viscosity fluid filled in the magnetic viscosity fluid device can be decreased.SOLUTION: A method for producing a magnetic viscosity fluid device is configured to interpose a magnetic viscosity fluid between members and transmit a force corresponding to the magnetic intensity applied to the magnetic viscosity fluid between the members. The method includes: a filling step of supplying and filling a predefined amount of the magnetic viscosity fluid from a container 20 in which the magnetic viscosity fluid is stored to the magnetic viscosity fluid device 12; a measurement step of measuring a weight of the predefined amount of the magnetic viscosity fluid filled in the magnetic viscosity fluid device 12; a calculation step of calculating a specific gravity of the magnetic viscosity fluid filled in the magnetic viscosity fluid device 12 based on a measurement result of the weight and the predefined amount; and a selection step of selecting the magnetic viscosity fluid device 12 in which the specific gravity calculated in the calculation step is within a predefined tolerance range with respect to a predefined value.SELECTED DRAWING: Figure 1

This application belongs to the field of magnetic field shielding technology for substation robots, specifically relating to a magnetic field shielding device for a substation robot and the substation robot itself. The magnetic field shielding device includes a mounting base, a magnetic field detection mechanism, and a shielding door mechanism. The mounting base is used to install on the top of the substation robot and has a cavity for accommodating the electronic modules to be shielded. The magnetic field detection mechanism includes an X-axis detection antenna assembly, a Y-axis detection antenna assembly, a Z-axis detection antenna assembly, and a magnetic field processing controller, which is installed within the cavity. This application reduces the cost of electromagnetic protection while also detecting changes in the amplitude of the synthesized magnetic field. Electromagnetic shielding is applied when the electromagnetic intensity is high, and the top electromagnetic protection is removed when the electromagnetic intensity is low. This effectively protects the electronic modules from electromagnetic interference and reduces the impact of electromagnetic protection on the robot's wireless communication functions, meeting the electromagnetic protection and daily use requirements of substation robots.

Inspection tool set, including: a magnetically coupled probe (28) dimensioned to fit into a channel (20) and slide along it; an inspection tool (15) with a magnetically coupled head (10) arranged outside the channel (20); and a sensor (14) which is attached to or arranged in the magnetically coupled head (10); wherein the sensor (14) is configured to detect when the magnetically coupled probe (28) has encountered an obstacle (26) located within the channel (20); and wherein the magnetically coupled head (10) and the magnetically coupled probe (28) are magnetically coupled to form a magnetically coupled probe / head pair having a magnetic strength sufficient to pull the magnetically coupled probe (28) inside the channel (20) when the magnetically coupled head (10) is moved outside the channel (20); a shaft (12) attached to the head (10) and the sensor (14), which is arranged between the head (10) and the sensor (14); and wherein the sensor (14) is configured to detect an increase in a lateral force, torque and / or lateral deflection of the shaft (12) when the magnetically coupled probe (28) encounters the obstacle (26) located inside the channel (20).

The utility model relates to the technical field of lasers, in particular to a high-performance non-magnetic 795nm collimation laser light source, which comprises a laser body. The laser body comprises a 795nm Vcse l laser chip, a thermistor, a capacitor, a ceramic substrate, a thermoelectric cooler TEC, a primary refraction prism, a secondary refraction prism, an A l alloy base, a collimating lens, a lens base, a non-magnetic tube shell and a cover plate; the utility model aims to realize the following technical effects: a non-magnetic packaging scheme is provided, so that the magnetic intensity of a device is less than 1nT, and an application scene with strict requirements on a magnetic field environment is met; a microminiature laser is designed, the overall device size reaches 8 * 7 * 7 mm, the equipment size is reduced, and the space utilization rate is improved; an airtight packaging structure is adopted, the reliability of the device is ensured, and the service life of the device is prolonged.

The application belongs to the technical field of electronic components, and provides a damping-adjustable roller structure and a damping adjustment method, which comprise: a mounting base; a first annular shaft fixed on the mounting base, the end surface of the first annular shaft being uniformly provided with a plurality of first bosses; a second annular shaft rotationally arranged on the mounting base and coaxially arranged with the first annular shaft, the surface of one end of the second annular shaft facing the first bosses being uniformly provided with second bosses; a magnetic field coil being arranged on the first annular shaft, the magnetic field coil being used for adjusting the magnetic intensity of the first annular shaft, the first bosses and the second bosses having a gap therebetween, and the first bosses and the second bosses being arranged in one-to-one correspondence. The magnetic field intensity of the first annular shaft is changed by adjusting the current size and direction of the magnetic field coil, the magnetic attraction force between the first bosses and the second bosses is adjusted, and the damping of the second annular shaft during rotation is adjustable. Meanwhile, the magnetic field coil can convert the kinetic energy of the second annular shaft into electric energy to achieve the technical effect of electric energy collection.

The invention relates to the field of magnetic nano materials, in particular to a superparamagnetic composite magnetic material and a preparation method and application thereof. The superparamagnetic composite magnetic material is of a jujube cake structure in which superparamagnetic nanoparticles are dispersed and embedded in a polymer matrix. The superparamagnetic composite magnetic material with the jujube cake structure has high saturation magnetization intensity; according to the preparation method disclosed by the invention, the superparamagnetic nano-particles can be prepared into the superparamagnetic composite magnetic material with a larger size, the prepared superparamagnetic composite magnetic material is high in saturation magnetization intensity, and the limitation of the size of the superparamagnetic nano-particles on the magnetic intensity is broken through; the superparamagnetic composite magnetic nano material with the jujube cake structure is suitable for preparing a demulsifier in oilfield development.

The invention relates to a hand-held transplanter for agricultural planting, which comprises a limiting assembly, the limiting assembly comprises a limiting piece, a seedling taking piece and a conveying piece, the limiting piece is arranged on the transverse side surface of the conveying piece, the limiting piece is provided with a moving groove, the seedling taking piece comprises a magnetic main body, a meshing column and a bearing, and the meshing column is movably arranged in the moving groove; the bearings are arranged on the two transverse side faces of the magnetic body along the conveying piece. The position adjusting assembly comprises a moving piece, a connecting piece, a driving piece, variable magnetic pieces and rice transplanting pieces, one end of the moving piece is movably connected with the limiting piece, and the two variable magnetic pieces are fixedly arranged at the two axial ends of one rice transplanting piece; the magnetic poles of the variable magnetic parts are the same as or opposite to the magnetic pole of the magnetic main body; the magnetic poles of every two adjacent variable magnetic parts are the same or opposite. The magnetism and the magnetism intensity are changed by electrifying the variable magnetic part, and the rice transplanting part and the rice seedling taking part are driven to be flexibly adjusted along the required seeding line spacing and plant spacing, so that the flexibility of adjusting the rice seeding spacing is greatly improved.

This invention relates to solid-state hydrogen storage systems. A storage system for storing solid-state hydrogen includes: a plurality of storage bodies comprising two or more solid-state hydrogen storage materials having different magnetic intensities; a storage container configured to house the storage bodies; and a coil disposed within the storage container and configured to apply a variable magnetic field to the storage bodies housed in the storage container.

The invention discloses a six-degree-of-freedom bipolar magnetized permanent magnet positioning method, a bipolar magnetized permanent magnet is obtained by assembling a magnetized first permanent magnet and a magnetized second permanent magnet according to the magnetic pole direction, and the shapes of the bipolar magnetized permanent magnet along each axis of the magnet are symmetrical. On the basis, in order to obtain the six-degree-of-freedom pose information of the permanent magnet, the magnetizing intensities of the first permanent magnet and the second permanent magnet are different, so that the magnetic field distribution of the bipolar magnetized permanent magnet along each axis of the magnet is asymmetrical, and the six-degree-of-freedom pose information of the permanent magnet can be obtained subsequently. And furthermore, when the bipolar magnetized permanent magnet moves along with the fixedly connected target device, the motion detection device in the magnetic field of the bipolar magnetized permanent magnet detects magnetic field data of the position where the motion detection device is located. And the processor can obtain the six-degree-of-freedom pose information of the bipolar magnetized permanent magnet after movement according to the magnetic field data. It can be known that the six-degree-of-freedom pose information of the bipolar magnetized permanent magnet with the regular shape can be obtained, and the positioning precision of the permanent magnet is high.

The utility model discloses a device for eliminating geomagnetic detection false signals, which comprises a working table, a rotary driving device is arranged at the top of the working table, the output end of the rotary driving device penetrates through the working table and is connected with a quick connection assembly, a demagnetization assembly is arranged at the bottom of the quick connection assembly, and a demagnetization module is arranged on the working table. A guide device is installed at the bottom of the degaussing assembly and used for gathering and guiding a natural magnetic field in a detection area downwards, the electromagnetic intensity of the natural magnetic field in the detection area is improved, and the degaussing assembly is used for cutting magnetic lines on the gathering and spreading path of the natural magnetic field through mechanical disturbance operation. Eliminating false signals by consuming the energy of the false magnetic field; the degaussing assembly comprises a rotating disc, the rotating disc is connected to the bottom end of the quick connecting assembly in a clamped mode, a degaussing wire frame is vertically installed at the lower end of the rotating disc, a degaussing coil is installed on the degaussing wire frame, and the guiding device is located on the inner side of the degaussing wire frame.

The present application provides an electronic device. The electronic device comprises a first screen and a second screen which are rotatably connected; a first magnetic member is provided in the first screen, and a second magnetic member is provided in the second screen; the magnetic intensity of at least one of the first magnetic member and the second magnetic member can be adjusted; by adjusting the magnetic intensity of at least one of the first magnetic member and the second magnetic member, the first magnetic member and the second magnetic member have opposite magnetic polarities, and an attractive force between the first screen and the second screen when the first screen and the second screen are closed is equal to a preset attractive force; and / or a damping force between the first screen and the second screen when the first screen and the second screen are opened is equal to a set damping force. Thus, an acting force between the first screen and the second screen of the electronic device is adjustable when the screens are opened or closed, thereby avoiding difficulty in opening the first screen and the second screen and sudden closing of the first screen and the second screen during closing, and improving user experience.