72 results about "Magnetic intensity" patented technology

A deadbolt system includes a stationary magnetic sensor that senses magnetic field values from at least one of the first and second magnets while rotating one or more gears that drive a deadbolt between extended and retracted positions during locking and unlocking operations. A controller compares the sensed magnetic field values during the rotating with expected magnetic field values. A tamper condition is determined in response to the sensed magnetic intensity falling outside a predetermined range for the expected magnetic intensity.

The invention provides a thermal power plant high-temperature section oxygen-free oxygen adding monitoring system and method, and relates to the technical field of oxygen content monitoring, an error prediction model is constructed according to monitoring errors of oxygen content monitoring equipment at different accumulative flows, and therefore the real oxygen content in feed water is obtained; then oxygen is injected, a magnetic intensity curve of the high-temperature steam pipeline is obtained, the corresponding relation between the thickness of ferroferric oxide and the magnetic intensity is obtained through a laboratory, a pH value curve of discharged steam is obtained, and the oxygen content condition of the steam is judged and regulated; according to the oxygen regulation and control amount and the intensity curve, the modification amount at different accumulative flows is obtained, the monitoring error is modified, the system comprises a water supply oxygen content obtaining module, a rear-end monitoring module, an oxygen content analysis module and a modification module, and smooth generation of the ferroferric oxide oxidation layer is guaranteed in the mode that monitoring is conducted from the front end and the rear end respectively.

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.

The invention relates to the technical field of electronic locks, in particular to an electronic lock with multiple magnetic detection functions and an unlocking method thereof, the electronic lock comprises a key detection mechanism and a controller, the key detection mechanism is in signal connection with the controller, and the key detection mechanism is provided with a first signal detection area and at least one second signal detection area; the first signal detection area is used for detecting the magnetic intensity of the key, and the second signal detection area is used for detecting the magnetic field parameter of the key; the first signal detection area generates an activation signal according to a first detection result of the magnetic intensity, and the activation signal is used for waking up the controller; and the controller controls the second signal detection area to be started and controls the electronic lock and / or equipment applied by the electronic lock to be in an opening state or a closing state according to a second detection result of the magnetic field parameter.

The invention relates to the technical field of magnetic product processing, in particular to conveying equipment with a sorting structure for magnetic product processing, and when magnetic products with different magnetic intensities pass through the lower portion of a magnet, the rotating angles of polygonal mounting grooves are different, so that guide plates rotating to one end of a conveying belt assembly are different; the magnetic products fall between the different guide plates along with the change of the magnetic intensity of the different magnetic products, so that the magnetic products with the different magnetic intensity are screened, after the magnetic products fall between the two guide plates, the polygonal mounting groove is reset, and the magnetic products are thrown out from the position between the two guide plates to the other conveying belt assembly under the inertia effect. The magnetic separation assembly guides different magnetic products to different positions through the rotation angle difference of a polygonal mounting groove and a guide plate, and finally throws the magnetic products to corresponding conveying belts through inertia, so that the separation precision is higher, the adaptability is high, various magnetic materials can be compatible, and the situation of mistaken separation is avoided.

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.

A deadbolt system includes a stationary magnetic sensor that senses magnetic field values from at least one of the first and second magnets while rotating one or more gears that drive a deadbolt between extended and retracted positions during locking and unlocking operations. A controller compares the sensed magnetic field values during the rotating with expected magnetic field values. A tamper condition is determined in response to the sensed magnetic intensity falling outside a predetermined range for the expected magnetic intensity.

The invention relates to the technical field of magnet magnetizing, in particular to a magnet magnetizing process which comprises the following steps of jig arrangement, magnet arrangement, magnetizing, jig unloading and loading and outputting, by designing a special jig, full-automatic filling, loading and clamping of tile-shaped magnets are achieved by utilizing the jig to be matched with a vibration disc, and the magnet magnetizing efficiency is improved. The jig shows excellent accuracy in the driving, clamping and stacking process, it is ensured that each magnet can accurately fall to a designated position, the stacked magnets are arranged in order, the neat arrangement state lays a solid foundation for the subsequent magnetizing process, and due to the fact that in the magnetizing process, the magnet can not be damaged easily, and the production efficiency is greatly improved. The arrangement state of the magnets directly affects the magnetizing effect, and the neat arrangement enables the magnetic field distribution to be more uniform, so that each magnet can obtain a stable and consistent magnetizing effect, the problems of insufficient magnetizing intensity, non-uniform magnetic field distribution and the like caused by disordered arrangement are effectively avoided, and the magnets are always kept in a good performance state.

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.

The utility model relates to a magnetic separation device for iron ore recovery, and belongs to the technical field of iron ore recovery, the magnetic separation device comprises a screening bin, the top end of the screening bin is fixed and communicated with a feeding hopper, the interior of the screening bin is rotatably connected with a magnetic separation roller, an inclined block is fixed to the right wall of an inner cavity of the screening bin, and two recovery bins are placed at the bottom of the inner cavity of the screening bin; two magnetic blocks are arranged in an inner cavity of the screening bin, two connecting bins are fixed to the left wall and the right wall of the screening bin, an adjusting assembly used for adjusting the distance between the two magnetic blocks is arranged in the two connecting bins, and the adjusting assembly comprises two sets of push rods, a toothed plate and two sets of meshing gears. According to the magnetic separation device for iron ore recovery, by arranging the adjusting assembly, the distance between the two magnetic blocks can be adjusted, so that the magnetic field intensity in the screening bin can be adjusted, magnetic separation can be conducted on iron ore with different magnetic intensities, the magnetic separation effect and the magnetic separation efficiency can be effectively improved, and the recovery rate and the quality of the iron ore are prevented from being affected.

The invention discloses a detector for measuring the density of a steel cord, and relates to the technical field of rubber framework material detection, and the detector comprises a detection probe which is used for sensing the magnetic intensity of the steel cord and converting the magnetic intensity into an electric signal; the signal processing unit is connected with the detection probe and is used for amplifying and filtering the electric signal; the control unit is provided with a parameter input module and is used for setting upper and lower limit thresholds of the magnetic intensity and analyzing the processed electric signal; the alarm unit is used for triggering an alarm when the detection value exceeds the threshold range; the detection probe is installed behind the cutting process of the steel cord production line through an elastic support and comprises a plurality of magnetic induction intensity detection heads, the detection probe is of a differential electromagnetic induction structure and comprises at least three Hall sensors arranged in a triangular shape, and the adjustable range of the detection distance is 5-15 mm. The detector for measuring the density of the steel cord adopts an advanced electronic circuit and an optimized detection probe, and compared with a traditional detection method, the detector for measuring the density of the steel cord can more accurately detect the density of the steel cord.

The present invention belongs to the technical field of oil and gas equipment detection, and particularly relates to a magneto-optical imaging detection system, an adaptive excitation, and a defect quantification method. The magnetic circuit module of the magneto-optical imaging detection system has a more efficient excitation intensity design and a smaller lift-off of the magneto-optical thin film, so it has a stronger surface and buried depth defect detection sensitivity; its optical imaging module has a higher integration degree, and the formed packaging structure of the magneto-optical imaging detection system is more miniaturized. The magneto-optical imaging detection system includes: a scanning probe, a light source controller, an industrial personal computer, a DC power supply, and a power amplifier; the scanning probe includes a magnetic circuit module and an optical imaging module; the magnetic circuit module is composed of a coil, a manganese-zinc ferrite, a magnetic shielding layer, and a magneto-optical sensor; the optical imaging module is composed of a camera, a polarized light source, and a polarizer. Among them, the coil is wound around the periphery of the manganese-zinc ferrite and is connected to the DC power supply and the power amplifier; the magnetic shielding layer is arranged outside the magneto-optical sensor.

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 present invention discloses a wireless charging safety protection system based on magnetic field modulation, which relates to the technical field of wireless charging optimization. The system includes a data collection module for collecting charging device data and performing preprocessing; a safety detection module for detecting the status of the charging device according to the collected charging device data and adjusting the electromagnetic intensity in real time for human safety protection; a management and optimization module for performing energy management and recovery on the charging device and optimizing the charging strategy; a display and storage module for displaying the charging device data and the status of the charging device and storing them in a database; and a central control module for connecting all modules and generating control commands for module interaction. The present invention effectively improves the accuracy of charging device status detection, adjusts the electromagnetic intensity according to the human body distance to improve charging safety, and at the same time realizes precise charging and discharging of the charging device through energy management and recovery of the charging device, thereby improving energy utilization efficiency.

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 utility model discloses a magnetic iron recovery device which comprises a magnetic separator shell and a magnetic roller supported and rotated in the magnetic separator shell, a flow guide partition plate forming an adsorption separation channel is arranged on the lower portion of the magnetic roller, a telescopic groove is formed in the flow guide partition plate, and an arc-shaped top plate capable of stretching out and drawing back up and down is placed in the telescopic groove. When the magnetic intensity is adjusted according to different grades of ore pulp, the position of the flow guide partition plate needs to be directly adjusted, and the distance between the adsorption separation channels can be adjusted only by adjusting the position of the arc-shaped top plate through the telescopic air bag, so that the adjustment is faster and more efficient; normal use of the magnetic separator is ensured without shutdown adjustment.

The present application discloses a dual - frequency coupled wireless transmission device and an efficiency compensation method for a charging pile, including: a transmitting end, which includes a low - frequency channel and a high - frequency channel; a receiving end, which includes a tightly - coupled receiving coil (L3) and a cooperative coil (L4); a composite magnetic shielding layer, which reduces the leakage magnetic intensity and electromagnetic radiation; and a control module. The present application has at least the following beneficial effects: improving the transmission efficiency: through the dual - frequency cooperative transmission mechanism, the present invention can default to activate the low - frequency channel at the start of the system, and utilize its strong magnetic field penetration characteristic to establish a basic energy transmission link; at the same time, it real - time monitors the load power demand at the receiving end. If the load power demand suddenly increases, it triggers the high - frequency channel to work cooperatively to achieve local enhanced transmission. This way of dual - frequency cooperative transmission enables the present invention to maintain efficient energy transmission in the face of different loads and offset situations; enhancing the system stability; and reducing electromagnetic radiation.

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.