152results about How to "Improve the utilization of magnetic field" patented technology

The invention discloses a self-powered vehicle vibration damping device which comprises a vibration damping device body and a vibration damping device controller, wherein the vibration damping device body comprises a first cylinder body, a piston rod, a piezoelectric generating unit, a transmission force spring unit, a magneto-rheological damping unit and an electromagnetic induction unit; the piezoelectric generating unit comprises a plurality of piezoelectric modules, and a plurality of piezoelectric vibrators are inlaid in each piezoelectric module; the transmission force spring unit comprises an upper spring pressing plate, a lower spring pressing plate, a lower spring clamping seat, an upper spring clamping seat and a transmission force spring; the magneto-rheological damping unit comprises an outer cylinder, an inner cylinder, a permanent magnet protecting cover, an upper damp channel, a lower damp channel, a magnet exciting coil and a piston; and the electromagnetic induction unit comprises a leakage-proof magnetic sleeve, a second cylinder body, a permanent magnet and an electromagnetic induction coil. The invention further discloses a control method for the self-powered vehicle vibration damping device. The self-powered vehicle vibration damping device provided by the invention is high in energy-regenerative efficiency, good in work stability, high in reliability, can adjust the damping force in real time, and ensures that a vehicle is in an optimal vibration damping state.

The invention relates to a spindle system of electrolysis and magnetic grinding combined machining machine tool, which comprises a power and transmission part, a self-suction type structure part, an electromagnetic loop system part, a high-frequency vibration part and a combined machining tool, wherein a pump-type impeller device of the self-suction type structure part is arranged in a liquid inlet barrel of a spindle to generate systemic action on electrolyte during operation, generate downward liquid discharge force, compensate the on-way pressure loss of the electrolyte and play a role of stirring mixed liquor of magnetic grinding materials and the electrolyte. The combined machining tool comprises an electrolysis electrode and a magnetic grinding magnetic pole, and the electrolyte flows out of a machining area through a gap between the electrolysis electrode and a workpiece. A polished rod vibration system of the high-frequency vibration part provides power through a vibration motor, and realizes the high-frequency Z-direction vibration of the spindle and the combined machining tool, and the amplitude and the vibration frequency of the polished rod vibration system are adjusted by adjusting an amplitude adjusting bolt and the rotation speed of a vibration motor. The invention can realize electrochemical machining, magnetic grinding and electrolysis and magnetic grinding combined machining functions.

The invention relates to an electromagnetic drive two-dimensional scanning micro mirror for laser scanning display. The micro mirror comprises a peripheral frame, an inner frame arranged in the peripheral frame, a vertical scanning twist beam connecting the peripheral frame and the inner frame, a micro reflecting mirror arranged in the inner frame and a pair of magnets. The peripheral frame is provided with a cantilever; the inner frame is connected to the cantilever of the peripheral frame through the vertical scanning twist beam; the cantilever is provided with a cantilever drive coil, the inner frame is provided with an inner frame drive coil, the magnets are arranged on two sides of the cantilever oppositely, and the magnetic induction lines produced by the magnets are perpendicular to the current directions of the cantilever drive coil and inner frame drive coil after powering. According to the micro mirror, the two groups of drive coils scanning in two directions are controlled independently, interference between two directions is reduced, large twisting angle can be acquired easily, the magnetic field utilization rate can be increased, and the drive scheme is simplified.

The invention discloses an exciter and a screen sounding device. The exciter comprises a housing, a vibrator assembly and a stator assembly. The interior of the housing forms a receiving cavity. The vibrator assembly comprises a vibrating portion and an elastic portion. The vibrating portion is suspended in the receiving cavity through the elastic portion. The vibrating portion comprises a first permanent magnet magnetized parallel to the vibration direction, and the first permanent magnet forms a middle avoiding space. The stator assembly includes a magnetically conductive core and a coil wound around the periphery of the magnetically conductive core, the magnetically permeable core portion is fixed in the accommodating cavity, the magnetically permeable core portion includes a support portion and a radial protrusion portion provided at one end of the support portion, the other end of the support portion is connected with the housing, a coil is wound outside the support portion and positioned between the housing and the radial protrusion portion, and the coil is positioned in the middle avoiding space and spaced apart from the vibration portion.

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 discloses a self-sensing magnetorheological damper adopting a spiral damping channel. The self-sensing magnetorheological damper comprises a working cylinder and a piston, wherein the piston is arranged inside the working cylinder and divides the working cylinder into a cavity I and a cavity II; the cavity I and the cavity II are filled with a magnetorheological material; an excitation coil and the spiral damping channel, which is used for enabling the magnetorheological material to flow in the cavity I and the cavity II, are arranged on the piston; the magnetic field of the excitation coil penetrates the spiral damping channel. According to the magnetorheological damper provided by the invention, the damping channel is a spiral damping channel, so that the effective length of the damping channel is lengthened, the magnetic field utilization ratio is increased, and the power consumption of the magnetorheological damper during adjustment is reduced.

The invention relates to a magnetic reselection device, in particular to an electromagnetically-focused concentration machine for concentrating magnetite, which comprises an ore supply hopper, an ore supply pipe, a tailing overflowing groove, a separation bucket, excitation coils, a water supply package, an ore concentrate funnel and an ore concentrate discharge valve. The separation bucket is internally provided with a plurality of layers of excitation coil with a waterproof ware-resistant protection layer from top to bottom by a bracket, the excitation coil at the upmost layer supplies a constant direct current, other excitation coils are grouped and sequentially switched on with the switching-on time and currents automatically or manually adjusted according to the overflowing density and the separation conditions, the upper part of the separation bucket is provided with a tailing overflowing density sensor, and an ore concentration density sensor is arranged between the ore concentrate funnel and the ore concentrate discharge valve at the bottom of the separation bucket. In machine, the utilization rate of the magnetic field is greatly improved, and lower-cost iron materials can be adopted for the separation bucket. By the aid of the control of the ore concentrate discharge valve, the circulating time adjustment of the separation magnetic field and the automatic control of the field strength, the aims of decreasing the manufacture cost of the device, saving the energy and ensuring the optimal separation effect are achieved.

The invention discloses an inner-channel vehicle suspension system magnetorheological damper, which comprises a cylinder barrel; a combined electromagnetic piston and a floating piston are arranged in the cylinder barrel in sequence from top to bottom; the combined electromagnetic piston divides the cavity chamber above the floating piston into an upper cavity chamber and a lower cavity chamber, which are filled with magnetorheological fluid; a bottom cover is arranged at the bottom end of the cylinder barrel; the bottom cover is respectively fixedly connected with an inflating and deflating valve and a lower lifting ring; a guide seat is arranged at the upper end of the cylinder barrel; the upper end of the guide seat tightly covers an upper end cover pressing the guide seat; the lower end of the guide seat is fixedly connected with a buffering block; the combined electromagnetic piston is fixedly connected with a piston rod penetrating through the guide seat and the upper end cover to extend outwards; the outer end of the piston rod is fixedly connected with an upper lifting ring of which the inside is provided with a wire outgoing groove. The inner-channel vehicle suspension system magnetorheological damper is simple in structure and low in manufacturing cost, can accurately adjust vehicle vibration generated by random excitation of a road face, and is high in work efficiency and work stability; the floating piston is enabled not to be clamped in the moving process up and down, and is stable when being used for pressure compensating; the liquid cannot easily leak in the work process.

The invention relates to a novel machine oil magnetizing filtering device. The novel machine oil magnetizing filtering device comprises a shell, a filtering element and a magnet, wherein the shell has an oil inlet hole and an oil outlet hole, the filtering element is arranged in the shell and is positioned between the oil inlet hole and the oil outlet hole, and the magnet is supported by a support member in the shell. As the support member is connected with the shell, when the novel machine oil magnetizing filtering device provided by the invention needs maintenance operation, the support member and the filtering element which are assembled into a whole can be separated from the shell of the base only by detaching the shell of a cover, then a support is detached, so that the operations of replacing the filtering element and washing the magnet can be conveniently carried out, conversely, after maintenance, the filtering device can be conveniently assembled. With the novel machine oil magnetizing filtering device provided by the invention, the accurate locating of the filtering element and the magnet can be realized, and the effect of the filtering device is guaranteed; and through well-designed integral structure, the supporting effect can be realized, and meanwhile, assembling and disassembling can be conveniently carried out, thus facilitating follow-up maintenance operation.

The invention discloses a semi-active dynamic vibration absorber for magneto-rheological elastomers and a selection and installation method. According to the semi-active dynamic vibration absorber andthe selection and installation method, multiple layers of cross-shaped cross beams arranged in parallel are fixed to the positions below a bottom frame base located at the bottom of a railway vehiclein a suspended mode through four vertical magnetic conductive rods arranged vertically and penetrating through the four end parts of cross-shaped beam arms; multiple layers of stacked structures which are spaced from each other are formed between multiple layers of grooving vibrators and the cross-shaped cross beams; vertical mounting through holes are formed in the centers of the cross-shaped cross beams; the annular magneto-rheological elastomers are arranged between the mounting through holes and a connecting shaft of the multiple layers of grooving vibrators; the multiple layers of grooving vibrators can vibrate up and down relative to the bottom frame base in the axial direction of the mounting through holes; winding grooves are formed in the beam arms of the cross-shaped cross beams; and excitation coils are wound in the winding grooves. The semi-active dynamic vibration absorber has the advantages that the vibration absorption effect is good, the energy consumption is small, the structure is simple and compact, the installation is easy, the safety and the reliability are high, the utilization of the residual space under the railway vehicle is reasonable, and vertical wide-frequency vibration reduction can be carried out on a railway vehicle body which suffers form an abnormal vibration problem due to the fact that a railway is unsmooth.

The invention discloses a horizontal linear motor structure which comprises a machine shell, a bottom plate is connected to the lower portion of the machine shell. A stator assembly is connected abovethe bottom plate; a vibrator assembly is arranged in the machine shell. The oscillator assembly comprises a mass block, a pole piece and a magnetic steel assembly. Two opposite sides in the mass block are respectively connected with a magnetic steel assembly, two sides of the magnetic steel assembly are connected with pole pieces, the mass block is connected with the machine shell through springpieces, the stator assembly comprises a coil, an iron core and an FPC circuit board, the FPC circuit board is connected above the base plate, and the coil is arranged above the FPC circuit board. Theinvention further discloses an implementation method of the horizontal linear motor structure. The magnetic steel, the yoke and the pole piece in the oscillator assembly, and the iron core and the support frame in the stator assembly form a magnetic field loop, so that the magnetic field is reserved in an effective area as much as possible, the utilization rate of the magnetic field is increased,the driving force is improved, and the magnetic field leakage is reduced.

A compression-shear mixed multi-layer magnetorheological elastomer shock absorber comprises a magnetic conductive tube mounted on a base, a piston mounted in the magnetic conductive tube, a magnet exciting coil mounted on the outer wall of a mounting seat arranged on the base as well as magnetorheological elastomers, wherein the magnetorheological elastomers comprise a shear type first magnetorheological elastomer and compression type second magnetorheological elastomers; the first magnetorheological elastomer is mounted between the piston and the magnetic conductive tube; a shock absorbing layer structure is mounted between the mounting seat and the piston and comprises the second magnetorheological elastomers and magnetic conductive plates, and the second magnetorheological elastomers and the magnetic conductive plates are arranged alternately. According to the compression-shear mixed multi-layer magnetorheological elastomer shock absorber, under joint action of the shear type magnetorheological elastomer and the compression type magnetorheological elastomers, the adjusting ranges of the rigidity and damping of the shock absorber are increased, the shock absorbing effect is enhanced, and the shock absorber can attenuate vibration load of different frequency and amplitudes.

The invention discloses a double-plate linear motion eddy current retarder, and belongs to the technical field of spacecraft on-track micro-vibration control. The double-plate linear motion eddy current retarder comprises a center shaft, a spring, a mounting cylinder, an outer cylinder, a first metal plate, a permanent magnet, a connecting shaft, a second metal plate, a magnetic shielding end cover and a magnetic shielding cylinder; the bottom of the mounting cylinder is fixed at the end part of the outer cylinder; a linear bearing is mounted in the mounting cylinder; the center shaft is sleeved in the linear bearing; the spring coats the mounting cylinder; the magnetic shielding cylinder is fixed in the outer cylinder; the magnetic shielding end cover is mounted at an opening end of the magnetic shielding cylinder; the permanent magnet is mounted in a closed space consisting of the magnetic shielding cylinder and the magnetic shielding end cover; after the connecting shaft penetrates through the permanent magnet, the top end of the connecting shaft is connected with the tail end of the center shaft; the first metal plate and the second metal plate are respectively fixedly connected to the two ends of the connecting shaft, and are respectively positioned at two ends of the polarization direction of the permanent magnet. The double-plate linear motion eddy current retarder is applied to the spacecraft on-track micro-vibration control, uses an electromagnetic induction principle for generating damping, and can adapt to such complex environments as high space vacuum and thermal alternation.

A power motor with circumferential windings is a switch reluctance type brushless motor composed of a stator, a rotor and an electronic control system; the rotor comprises three rotor magnetic poles as 436, 437 and 438 which are 120 degree from one another; the stator comprises a stator magnetic core and the circular circumferential windings; the stator magnetic core includes three circumferential grooves vertical to the axial and radial directions, and the circumferential windings 311, 312 and 313 are placed in the grooves respectively, three stator magnetic-pole pairs as 284, 285 and 286 are distributed uniformly at the two sides of notches in an aligned manner respectively, and magnetic pole distances between adjacent magnetic poles are as 287, 288 and 289. Stator sequential phase-splitting and rotor spatial phase-splitting are used, the motor serves as the switch reluctance type motor or power generator under control of the electronic power system, end-portion magnetic flux leakage and loss of traditional windings are overcome, the pole number of the motor is not limited by the windings, the phase number is easy to adjust, consumables are saved, temperature rise is reduced, the power and efficiency are improved, loss of a power supply cell is low, and the reliability is high.

The invention provides a rotor structure, a permanent magnetism auxiliary synchronization magnetic resistance motor and an electric vehicle; the rotor structure comprises a rotor body having a permanent magnet slot set; the permanent magnet slot set comprises an outer permanent magnet slot; the rotor body is also provided with a first air slot; a first end of the first air slot and the end portionof the outer permanent magnet slot are connected or adjacent to each other; a second end of the first air slot extends to the outer edge of the rotor body and gradually gets away from the straight axle of the rotor body; when the first end of the first air slot is adjacent to the end portion of the outer permanent magnet slot, a first magnetic conductive channel is formed between the first end ofthe first air slot and the end portion of the outer permanent magnet slot. The rotor body is provided with the air slot that decides the direction of a rotor magnetic path, thus reducing magnetic flux leakage in a process in which the stator magnetic field reaches the rotor via an air gap, improving the magnetic field utilization rate, increasing torque output, minimizing demagnetization effect on the permanent magnet by a demagnetization magnetic field, and enhancing the anti-demagnetization capability.

An electromagnetic driving device comprises at least two magnets and at least one coil. Magnetizing directions of the magnets are the same or opposite and are perpendicular to the plane of the coil roughly, the magnets are arranged in a manner of keeping the same polarity opposite while reserving a gap between the magnets, and at least a part of the coil is disposed in the gap between the two magnets wich are arranged oppositely. An electromagnetic lens driving device comprises a frame cover, a lens support, a coil, at least two magnets and a spring, wherein at least a part of the lens support is mounted in the frame cover, the coil is mounted on the lens support, and the magnets are fixed on the frame cover. The sizes of a voice coil motor and a voice coil motor lens driving device are small, operation efficiency is high, the coil can be driven to move by a small quantity of current, and thus energy is saved while size is reduced.

The invention discloses a support skeleton for adjusting the inter-turn resistance of an uninsulated superconducting magnet and relates to the field of uninsulated superconducting magnet support skeleton. The support skeleton comprises a coil skeleton, a clamping and an adjusting device, and is characterized in that the coil skeleton is configured to provide a winding support for an uninsulated superconducting tape winding magnet; the clamping plate is in close contact with the magnet coil wound around the coil skeleton; the adjusting device changes the pressure between the magnet coils woundaround the coil skeleton by adjusting the relative position of the moving portion of the clamping plate so as to change the inter-turn resistance of the magnet. The invention also discloses a method of the support skeleton for adjusting the inter-turn resistance according to a charging delay requirement. The support skeleton avoids the problem that the inter-turn resistance is formed once and thesuperconducting strip cannot be reused in a traditional dipping method, and is simple and reliable in operation, visualized in operation process, and the inter-turn resistance can be adjusted according to actual needs.

The invention discloses an intelligent variable-stiffness tuned mass damper system with magnetorheological elastomer bearings and belongs to the technical field of passive structure adaptive control. The intelligent variable-stiffness tuned mass damper system comprises a tuned mass block, a stress component, excitation components, sensors and a controller, wherein the tuned mass block is mounted on an upper connecting plate; the stress component consists of at least four magnetorheological elastomer bearings, magnetic-conducting connecting plates and the upper connecting plate; each bearing is enwrapped with a protective rubber layer; each excitation component consists of a coil, an iron core and a hard insulating layer; one sensor is mounted on each of the upper connecting plate and a lower connecting plate; the controller changes the shearing stiffness of the system according to a signal. The intelligent variable-stiffness tuned mass damper system is simple to produce and convenient to mount; the mechanical and magnetic properties of materials are fully utilized, and the space utilization rate and the magnetic field utilization rate are high; compared with a cylindrical bearing, a circular truncated cone-shaped bearing has wider stiffness adjustment range and better overall stability; each coil is not only taken as one excitation component, but also has the function of the tuned mass block; real-time and efficient adjustment can be ensured.

The invention discloses a permanent magnet linear generator, a magnetorheological damper and a magnetorheological damping system. The permanent magnet linear generator comprises a stator, a connection rod and a plurality of permanent magnets; the stator comprises an accommodation chamber with a telescopic mouth; the inner wall of the accommodation chamber is provided with a plurality of convex teeth at intervals; two opposite sides of the top end of each convex tooth extend along an axial direction of the accommodation chamber to form side teeth; the convex teeth and the side teeth are made of a permeability material, and the adjacent convex tooth and side tooth form a groove for accommodating an electromagnetic coil; the connection rod is positioned in the accommodation chamber of the stator, and is provided with a first connection end extending out of the telescopic mouth; and the plurality of permanent magnets are connected with the connection rod, and a magnetic pole is arranged between the adjacent permanent magnets. By the design of the convex teeth and the side teeth, more magnetic force lines pass through an air gap to form a closed-loop circuit; the utilization rate of a permanent magnet magnetic field is improved; and a value of an induced electromotive force is increased, and the electricity generation rate is high.

The invention discloses an anti-shake camera module and an anti-shake camera device. The camera module comprises a shell, a lens assembly and a driving assembly, wherein the shell consists of an uppercover and a base, the lens assembly is movably fixed in the shell through a first spring piece, the driving assembly controls the lens assembly to deflect in two orthogonal directions perpendicular to a plane of an optical axis, the driving assembly comprises an annular magnet and deflection coils, the annular magnet is coaxial with the lens assembly, two polarities of the annular magnet face twoends of the lens assembly respectively and are used for driving the lens assembly to deflect, the deflection coils are arranged on the periphery of the annular magnet in two orthogonal directions, face different polarities of the outer side of the annular magnet and are parallel to each other, and the current directions of the two wires are opposite. The camera module is advantaged in that electromagnetic efficiency is high, and the size is small.

The invention discloses a vibration sounding device and an electronic product. The device comprises a shell, a fixing piece and a driving assembly, at least part of the shell is configured to vibraterelative to the fixing piece; the driving assembly comprises at least one coil and a Halbach magnet, the coil is fixedly connected with the fixing piece, the Halbach magnet is fixedly connected with the shell, or the Halbach magnet is fixedly connected with the fixing piece, and the coil is fixedly connected with the shell, wherein the plane where the coil is located is perpendicular to the part,used for vibration, of the shell, the coil is located on the side portion of the Halbach magnet, the annular end face of the coil faces the Halbach magnet, and the coil penetrates through a magnetic field enhancement area of the Halbach magnet.

The invention relates to a semi-active suspended type lightning protection shock absorbing seat. The semi-active suspended type lightning protection shock absorbing seat comprises a seat and a chair back; the seat is fixedly connected with the chair back through an arc fixing frame; lifting rods are vertically arranged on the two sides of the seat; the top of each lifting rod is detachably connected with the top of a vehicle body; bottom stopping sheets are detachably connected to the bottoms of the lifting rods and arranged perpendicular to the lifting rods; magnetic fluid rheostat adjustingmechanisms are arranged under the lifting rods; the upper ends of the magnetic fluid rheostat adjusting mechanisms are fixedly connected with the bottoms of the corresponding sides of the seat; sensors are arranged between the tops of the lifting rods and the top of the vehicle body; the sensors are electrically connected with a controller; the controller is electrically connected with a power supply generator; and the power supply generator is electrically connected with the magnetic fluid rheostat adjusting mechanisms. The semi-active suspended type lightning protection shock absorbing seathas the advantageous effects that the assembling and disassembling are convenient; the floor space is small; by using magneto-rheological characteristics of magnetorheological fluids, variable rigidity and variable damping can be realized to be convenient for effectively absorbing impact loads; active adaptation to different vibrational excitation is strong; and a very good protection effect on the safety of vehicle-mounted personnel is realized.

The invention relates to an operating mechanism for a medium-high voltage distribution line circuit breaker, belonging to electrical equipment. The permanent-magnet operating mechanism comprises a movable shaft, coils and a permanent magnet, wherein the movable shaft is positioned at the axial lines of the coils; the permanent magnet is circular and fixed on the movable shaft, and the outer diameter of the permanent magnet is less than the inner diameter of each coil; the number of the coils is at least two; and the coils are coaxially arranged in a circular cylinder body. On the basis of the structure, the invention can also have the structure that the cylinder body can conduct magnetism and has an axial section which is in a hollow H shape, and both ends of the cylinder body are provided with an upper cover plate and a lower bottom plate which both can conduct magnetism. The invention strengthens the interaction among magnetic fields, increases the utilization ratio of the magnetic fields, realizes the idle work of the on-off state of the circuit breaker operating mechanism, optimizes the on-off state characteristics of the circuit breaker operating mechanism, enhances the controllability of the circuit breaker, has the advantages of simple structure and low cost, and enhances the reliability of the whole circuit breaker.

The invention relates to an automobile magneto-rheological absorber based on a multistage circumferential flow mode. The absorber has an inner cylinder barrel which is packaged up and down. A piston having a certain number and aperture of piston holes and a piston rod are installed in the cylinder. The inner cylinder barrel has communication holes communicated with circumferential channels. Multistage circumferential channels are installed on the out wall of the inner cylinder barrel. Annular blocks with high magnetic conductive and the same sectional area as the circumferential channels are all arranged at both ends of each stage of the circumferential channel. The out wall of an external cylinder barrel is the winding position. Chucks themselves at the end of the external cylinder are main path of the magnetic force lines. A magnetic conductive cylinder is arranged between a coat of the absorber and a coil. The magnetic force lines form a closed loop circuit through the annular blocks, the circumferential channels and magnetorheological fluid, chucks at the end of the external cylinder, a magnetic conductive cylinder, and a support block upper end part. The maximum damping force provided by the structure is larger, the adjustment range is wider, the magnetic field use ratio is high, the energy consumption is little, the use is wide, the universality is strong, the structure is simple, it is convenient to maintain, and the absorber body has long service life.

The invention relates to a magnetic control time-delay device which comprises a semi-closed iron core with an opening and a magnet exciting coil wound on the iron core. Magnetic poles are arranged on the two sides of the opening of the semi-closed iron core, the two magnetic poles correspond oppositely, an insulation box used for containing magneto-rheological plaster is fixed in the opening, the insulation box is fixedly arranged between the two magnetic poles, electrode slices are fixedly arranged on the two sides, corresponding to the magnetic poles, on the inner side of the insulation box respectively, the space between the two electrode slices is filled with the magneto-rheological plaster, the two electrode slices are respectively in full contact with the magneto-rheological plaster, and the magnet exciting coil, the iron core, the electrode slices and the magneto-rheological plaster form a closed magnetic circuit. The two electrode slices are respectively connected with a circuit access terminal through wires, and the two outgoing ends of the magnet exciting coil are respectively connected with a power source access terminal through wires. The device is simple in structure and good in reliability.

Disclosed are a rail transit non-contact power supply device with honeycomb-type coils and a power supply method of the rail transit non-contact power supply device. The power supply device comprises a pickup coil and a controller of a power supply station, wherein the pickup coil is arranged at the bottom of a locomotive. The controller is connected with an ADA converter, and the ADA converter is connected with a power supply coil buried below the earth surface of a track power supply section, wherein the power supply coil is formed by connecting a plurality of small power supply coil bodies in parallel, and the small power supply coil bodies are equal in size, are distributed below the earth surface of the whole track power supply section in a honeycomb mode and are in series connection with switching tubes respectively. The control ends of the switching tubes are connected with the controller. Signal receivers for detecting the pickup coil are evenly arranged on the center line of the earth surface of the track power supply section at intervals of the distance of a small power supply coil body and are connected with the controller. A signal generator is arranged on the pickup coil. The non-contact power supply device is high in power supply power and magnetic field utilization ratio, saves energy resources and obviously reduces electromagnetic radiation.

The invention discloses a novel stacked parallel structure NFC antenna applied to a mobile terminal. The antenna is applied to the mobile terminal and comprises a substrate, and a first wire and a second wire respectively arranged on a first surface and a second surface of the substrate, wherein the first wire and the second wire are identical in wire directions and are arranged parallelly, and the first wire and the second wire are communicated through conduction holes. The invention further discloses the mobile terminal equipped with the novel stacked parallel structure NFC antenna. The novel stacked parallel structure NFC antenna and the mobile terminal are advantaged in that the structure is compact and simple, antenna impedance is substantially reduced, current loss is reduced, a magnetic field utilization rate is effectively improved, and antenna performance is improved.

The invention discloses a dual-beam mutually excited multistable frequency-raising vibration energy collecting device, which comprises a shell, a driving cantilever beam I, a driving cantilever beam II and two high-frequency piezoelectric cantilever beams, wherein one end of the driving cantilever beam I is open, the driving cantilever beam I is provided with a through slot used for accommodatingthe driving cantilever beam II in a mode of extending from the open end to the other end, the open end of the driving cantilever beam I is fastened on the shell, and the other end is fixedly providedwith a counterweight block and a rubidium ferrum boron permanent magnet I; the driving cantilever beam II is located inside the through slot of the driving cantilever beam I, one end of the driving cantilever beam II is fastened on the shell, and the other end is fixedly provided with a counterweight block and a rubidium ferrum boron permanent magnet II; the two high-frequency piezoelectric cantilever beams are symmetrically arranged at two sides of a neutral surface of the driving cantilever beam I and are fixed through the shell; and a rubidium ferrum boron permanent magnet III is fixed on the shell in the extending direction of the outer end of the driving cantilever beam I. According to the invention, a cantilever beam vibrator can be avoided from being caught in a certain outer potential well to result in failure of the vibration energy collecting device through mutual excitation of the two driving cantilever beams.

The invention discloses a magnetorheological damper embedded with multi-path communicating flow passages and belongs to the technical field of semi-active control vibration isolation. The two ends ofa cylinder body are provided with a front end cover, a rear end cover and a cup sleeve. Six magnetic poles are circumferentially arranged in the cylinder body. Independent field coils are wound aroundthe magnetic poles and are wound around the cylinder body in the bus direction of the cylinder body. Each magnetic pole is internally provided with a flow passage. A piston is in direct contact and coaxial with the inner wall of the cylinder body composed of the magnetic poles. A piston rod extends from upper and lower end covers, wherein the portion extending out of the upper end cover is connected with a connecting rod, an upper nut pressing plate and a lower nut pressing plate are arranged on the connecting rod, and a spring is arranged between the lower nut pressing plate and the upper end cover. According to the magnetorheological damper embedded with the multi-path communicating flow passages, the six magnetic poles are combined with the six embedded flow channels, wherein the six magnetic poles not only have a high proportion of effective acting area, but also can meet different requirements by respectively controlling the conducting / interruption, direction and value of the coil current of each magnetic pole; and six-channel embedding can ensure that the damping adjustable multiple is greater than 20 and the volume is small.

The invention relates to a portable high-pressure vacuum switch vacuum degree tester which is characterized by comprising a field coil, a measurement and control system and a lithium ion power supply system. The field coil is a flat cable type hollow cylindrical coil; leads are connected in series with each other; both ends of the coil are connected through a parallel port; the field coil is wound in the middle part of a vacuum arc extinguish chamber and is discharged by a capacitor; the measurement and control system is used for controlling the generation of a pulse magnetic filed and a pulse electric field as well as measuring, converting and displaying ion current; and the lithium ion power system is used for providing 220V / 50Hz sine wave alternative current and 24V direct current. The invention improves the sensitivity for measuring the vacuum degree of a non-detachable vacuum arc extinguish chamber as well as the efficiency for generating high-pressure electric field and magnetic field, improves the measuring precision of the tester and ensures more accurate vacuum degree value under the different ionic current orders of magnitude by adopting piecewise linearization processing to the ionic current-vacuum degree curve in a data memory.