156 results about "Magnetic wall" patented technology

A radiation shield (36) includes a virtual magnetic wall (VMW), which is adapted to be placed between a radiating antenna (34) and an object (30) so as to reflect electromagnetic radiation emitted from the antenna in a given frequency band and having an electric field with a given polarization, away from the object. The electric field of the radiation reflected by the VMW is substantially in phase with the electric field of the emitted radiation incident on the VMW.

The invention belongs to the technical field of special robots, and in particular relates to a novel differentially driven composite attraction type wall climbing robot. The wall climbing robot comprises a climbing mechanism, wherein the climbing mechanism comprises a front wheel module which is a universal rolling magnetic wheel device, a rear wheel module which is a permanent magnetic gap attraction device, a frame for connecting front and rear wheels, and a motor driven controller arranged on the frame; the climbing mechanism has a three-wheel structure; the two rear wheels are driving wheels; the robot can steer on a magnetic wall surface by a mode that the rear wheels are driven differentially. The wall climbing robot has the advantages that the front wheel module of the climbing mechanism is the universal rolling magnetic wheel device, and a pure rolling state is kept during running, so that the front wheel module can run flexibly; attractive force of the rear wheel module can be adjusted through a gap between a base plate and the magnetic wall surface; a magnetic wheel and the permanent magnetic gap attraction device are simultaneously adopted, and the front wheel is the magnetic wheel, so that the attractive force is guaranteed, and the compactness of the structure is improved; and simultaneously, the permanent magnetic gap attraction device is arranged on the base plate around the surrounding rear wheels, so that the wall climbing robot has high load capacity.

The invention discloses a low-profile magnetoelectric dipole antenna structure based on a bent magnetic wall, and the structure comprises a radiation unit part and a vertically-inverted-L-shaped feedpart and a common-ground coplanar waveguide feed part. The radiation unit part comprises a pair of trapezoidal electric dipoles and a pair of short-circuit bent magnetic dipoles, wherein the electricdipole are horizontally placed a top dielectric substrate, and the magnetic dipoles are implemented through the forming of metalized via holes on the dielectric substrate. The magnetic dipoles and theelectric dipoles are placed in a mutually perpendicular manner. A horizontal part of the vertically-inverted-L-shaped feed part is a cap-shaped paster, and a vertical part of the vertically-inverted-L-shaped feed part is implemented through the form of metalized via holes. The common-ground coplanar waveguide feed part is located on a bottom dielectric substrate, wherein the upper surface of thedielectric substrate is a metal ground, and the lower surface of the dielectric substrate is provided with two parts: a signal line of a common-ground coplanar waveguide and a ground line. The upper and lower metal grounds are connected with the metalized via holes. The antenna is simple in structure, is easy to integrate, is high in stability, is low in profile, and is suitable for a mobile positioning system in a modern wireless communication system.

The invention discloses a fluctuation thermoacoustic generation system, which comprises the following loop parts in sequence: cold junction heat exchanger, heat regenerator, heater, heat buffer pipe, hot junction heat exchanger, ring-shaped connection pipe and line generator in the pipe, wherein the generator contains a cylinder with one end of casing on the pipe and the other end with line sliding bearing; a double-loop magnetic-inductive soft iron with ring orifice is set in the cavity between cylinder and casing; the permanent magnet is inserted in the outer ring magnetic wall of soft iron; the coil rack is fixed on cylinder inner wall with part of coil in the ring orifice; the elastic or quality component is set in the hot junction pipe; the quality component does shift sliding along the elastic element; the elastic or quality phase modulation component is set in the greenhouse pipe; the quality component does shift sliding along the elastic phase modulation element. The invention can adjust the phase difference of pressure fluctuation and bulk flow fluctuation, which feedbacks the acoustic power to accomplish high effective Stirling cycle as well as inhibits the loop ring current to improve property of entire machine.

A magneto-optical storage apparatus including an ultra-high density information recording media having an inorganic compound layer 12 on a substrate 11, and in the inorganic compound layer 12, an oxide of at least one kind selected from silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, and zinc oxide exists in an amorphous state at a grain boundary of crystal grain of an oxide of at least one kind selected from cobalt oxide, iron oxide, and nickel oxide. The media has a magnetic layer 13 made of an artificial lattice multilayer obtained by alternately laminating a Co layer or an alloy layer consisting of Co as a main phase and a metal element layer of at least one kind selected from Pt and Pd onto the layer 12. Thus, a distribution of magnetic properties serving as a pinning site of the movement of a magnetic wall in case of recording information to the magnetic layer 13 is formed in the magnetic layer 13.

A customizable modular magnetic wall system is provided for displaying items while allowing a user to aesthetically configure and tailor the system to the user's needs. The system includes a magnetic backing plate and at least one module. The module includes a base portion and a utility member. The base portion of the module is magnetically securable at a plurality of positions on the backing plate. In addition, the utility member projects outwardly from the base portion and is sized and configured to receive the item. The module may include a shelf, hooks, and other various devices for displaying the item.

The invention discloses an electric tunable band-pass filter based on a half-module substrate integrated waveguide. As an ideal magnetic wall is arranged in the middle of the substrate integrated waveguide, and a power line is parallel to symmetrical central lines of a first sheet metal, the substrate integrated waveguide can be divided into two parts from the ideal magnetic wall without changing the field mode, the situation that the substrate integrated waveguide is provided with the same performances can be ensured, and the size of a device formed by the substrate integrated waveguide can be greatly decreased; in addition, the insertion loss can be effectively reduced to increase Q value through a ground connection hole; besides, through a first blocking capacitor, a second blocking capacitor, a third microwave transmission line, a fourth microwave transmission line, and the substrate integrated waveguide forming a half module, direct current feed can be effectively loaded, and frequency adjustment is facilitated; through a first variable capacitance and a second variable capacitance, a passband of the filter based on the half-module substrate integrated waveguide performs frequency adjustment. The electric tunable band-pass filter is suitable for being popularized and applied in the field of radio frequency devices.

A magnetic shift register includes at least a magnetic memory track of which several magnetic walls separate the memory track into multiple magnetic domains to serve as magnetic binary memory cells. The magnetic memory track includes multiple data regions. Each data region has multiple of the magnetic binary memory cells for storing bit data at a quiescent state and registering at least one of the bit data shifted from the adjacent data region at a shifting state. Wherein, the bit data of the magnetic binary memory cells is shifted between the adjacent two data region under an operation current.

This invention is applied to any ionized solution of dissolved solids and electrolytes, such as sea water, which is forced through a conduit equipped with a magnetic wall of rectangular cross-section, which induces a magnetic field, where ions separate when passing through according to magneto-hydrodynamic physics. The conduit is made up of one continuous magnetic wall, a spiral or similar, with opposite magnetic poles on each side, where these both sides co-operate to extend magnetic fields with parallell wall in the same direction through the whole conduit. The ionized solution is pumped into the center of the spiral and further out through the spiral or similar. The charged ions in the flow stream are deflected laterally towards the open ends and as separated positive or negative ions into chambers outside the conduit. The ions concentrating in each chamber influence an electric tension acting similar to a capacitor, which counteracts the magnetic field movement of the ions but is released by short-circuiting the electrodes placed in each chamber to discharge the ions thus inducing a useful current. With the discharge of ions gases are produced and trapped in cylindrical collectors. The spiral outlet is divided into cells to control and to adjust the degree of de-ionization. An additional power source connected in series with the electric circuit increases the rate of de-ionization and speeds up ion discharge and gas output. The effluents have a controlled speed outflow from both chambers into drainpipes.

The invention discloses a half-mode substrate integrated waveguide-based compact six-port circuit. A 3dB directional coupler formed based on magnetic wall coupling of half-mode substrate integrated waveguides is utilized, so that the higher-anti-interference performance and structurally-compact six-port circuit can be realized. According to a traditional half-mode substrate integrated waveguide (HMSIW) electric wall aperture coupling-based coupler structure, equivalent magnetic walls are exposed externally, and the coupler structure will be easily interfered when high integration is carried out, aperture is relatively large in strong coupling, and the size of a circuit is very large. According to the half-mode substrate integrated waveguide-based compact six-port circuit of the invention adopted, coupling is realized between the magnetic walls of the half-mode substrate integrated waveguides, so that stronger anti-interference ability can be realized; according to a power distributor module, inductive metalized through holes are additionally formed at the joints of micro-strip tapered lines and substrate integrated waveguides (SIW), so that the bandwidth of the power divider can be further increased; phase converters are realized by using 1/8 wavelength half-mode substrate integrated waveguide (HMSIW) transmission lines; and the 3dB directional coupler, the power distributor module and the phase converters are connected together so as to form the compact six-port circuit of the invention.

The invention discloses a magnetic block design method for a crawler type magnetic wall-climbing robot. Under the condition that the robot does not slide on the wall surface and overturn, and according to the relation between the equilibrium of forces and the equilibrium of moments, the method infers the minimum attraction Fi1 which needs to be provided by a magnetic block when the robot climbs up and down on the sloped wall surface, and the minimum attraction Fi2 which needs to be provided by the magnetic block when the robot climbs horizontally on the sloped wall surface; by means of the theoretical calculation and analysis of electromagnetism, and in combination with a magnetism recovery curve, the method works out that the attraction of each magnetic attraction unit in each magnetic block on caterpillar bands of the robot is Fa; and when the magnetic block is designed, the magnetic block structure is so adjusted that Fa is larger than or equal to Fi1 and Fi2. The magnetic block designed by the invention can provide enough attraction, so that the robot cannot fall off the sloped wall surface. Moreover, the magnetic block is of a multi-magnetic path structure, so the attracting adaptability of a single magnetic block to non-planar wall surfaces can be enhanced.

The invention discloses a construction method for magnetic putty powders and magnetic wall surfaces. According to the part by weight, the magnetic putty powder consists of 5-60 parts of putty powders or adhesive and 95-40 parts of magnetic iron mine powders or iron powders which are uniformly mixed with each other; when the magnetic putty powder of the invention is used for plastering the wall surface, according to the design requirement, a trough with a certain length, width and depth is remained on the new wall surface which is not decorated or no the original wall surface; the magnetic putty powder added with water is uniformly mixed to prepare the magnetic putty; subsequently, the magnetic putty is filled in the trough and plastered flatly; after the magnetic wall surface is dried, required coatings are brushed on the magnetic wall surface. When the magnetic putty of the invention is used for plastering the wall surface, the wall surface has magnetism, facilitates the hanging of drawings, paints and decorations, and is convenient and beautiful.

The invention provides a wind power self-lifting system comprising a plurality of magnetic wall-climbing carts (110) and a variable diameter truss (200). Each magnetic wall-climbing cart comprises a frame (110), a motor (120), a drive device (130), travelling mechanisms (140) and a magnetic sucker (150), wherein the motor is fixed on a support of the frame, the travelling mechanisms are tracked and composed of a plurality of sprockets and drive chains, and the magnetic sucker comprises a bracket, magnets and elastic blocks, and the magnets and the elastic blocks are disposed on the bracket at intervals. The variable diameter truss is hinged to the magnetic wall-climbing carts and comprises a plurality of crossing arms (210) with ends connected. Intersections of the crossing arms form a first circle, inner ends of the crossing arms form a second circle, and outer ends of the crossing arms form a third circle; the circles are concentric. Each crossing arms include wide arms (211) and narrow arms (212). Magnetic guide carts are fixed at the inner ends of the crossing arms.

The invention discloses a TM dual-mode balanced band-pass filter based on SIW (substrate integrated waveguide). The band-pass filter comprises a first dielectric substrate, a first metal plate, a second dielectric substrate, a second metal plate and a third dielectric substrate which are sequentially and coaxially arranged from top to bottom, micro-strip lines are arranged on the first dielectricsubstrate and the third dielectric substrate, a first rectangular gap rotating anticlockwise by 38 degrees is formed in the first metal plate, the second dielectric substrate is provided with a metalthrough-hole array and two perturbation metal holes, and a second rectangular gap rotating clockwise by 38 degrees is formed in the second metal plate. According to the band-pass filter, two poles aregenerated in a pass band, a transmission zero is generated on each side of the pass band, and the band-pass filter has high selectivity. Besides, the position and the size of a coupling gap are designed, six modes near TM120 and TM210 modes are effectively inhibited, and good wide stop-band inhibition performance is achieved. Magnetic walls are formed in the middles of the micro-strip lines underexcitation of a common mode, and magnetic current cannot enter a resonant cavity through the coupling gap, so that high common mode rejection is achieved within a wide frequency band range.

An improved perpendicular magnetic recording medium and an improved magnetic storage apparatus are provided, which are suitable for high speed and high density magnetic recording. A magnetic under layer of a two-layered perpendicular magnetic recording medium includes three layers: a ferromagnetic layer; a non-magnetic layer; and a ferromagnetic layer, wherein the ferromagnetic layers are antiferromagnetically coupled with each other, thereby preventing a magnetic flux from a magnetic wall in a magnetic under layer from entering a read back head.

The invention discloses a traveling-wave thermoacoustic refrigerating system, which comprises the following loop parts in sequence: cold junction heat exchanger, heat regenerator, heater, heat buffer pipe, hot junction heat exchanger, ring-shaped connection pipe and pressure-wave generator in the pipe, wherein the generator contains a cylinder with one end of casing on the pipe and the other end within line sliding bearing; a double-loop magnetic-inductive soft iron with ring orifice is set in the cavity between cylinder and casing; the permanent magnet is inserted in the outer ring magnetic wall of soft iron; the coil rack is fixed on cylinder inner wall with part of coil in the ring orifice; the elastic or quality component is set in the hot junction pipe; the quality component does shift sliding along the elastic element; the elastic or quality phase modulation component is set in the greenhouse pipe; the quality component does shift sliding along the elastic phase modulation element in the pipe periodically. The invention can adjust the phase difference of pressure fluctuation and bulk flow fluctuation, which feedbacks the acoustic power to accomplish high effective Stirling cycle as well as inhibits the loop ring current to improve property of entire machine.

A customizable modular magnetic wall system is provided for displaying items while allowing a user to aesthetically configure and tailor the system to the user's needs. The system includes a magnetic backing plate and at least one module. The module includes a base portion and a utility member. The base portion of the module is magnetically securable at a plurality of positions on the backing plate. In addition, the utility member projects outwardly from the base portion and is sized and configured to receive the item. The module may include a shelf, hooks, and other various devices for displaying the item.

A track type wall-climbing four-freedom degree parallel robot comprises a tracked vehicle and a four-freedom degree parallel robot body; the tracked vehicle comprises a rectangular chassis, four sleeves and two permanent magnet track mechanisms, wherein the sleeves are uniformly distributed on the chassis and are fixedly connected to the chassis, and the permanent magnet track mechanisms are symmetrically connected to the chassis and drive the chassis to crawl along a magnetic wall; the four-freedom degree parallel robot body comprises a moving platform, four SPR type branches of the same structure, two connecting rods and four magnetic plates; the SPR type branches comprise cylinder bodies and piston rods, each connecting rod penetrates through parallel through holes in the moving platform, the two ends of each connecting rod are connected to rotation pairs at the upper ends of the cylinder bodies of two branches, the lower ends of the piston rods are connected to spherical pairs on the magnetic plates, and the magnetic plates are in slide fit with the sleeves. The track type wall-climbing four-freedom degree parallel robot has the advantages that the attraction force is large, the motion is flexible, the structure is simple, control is easy, and the moving platform can carry tools for repairing large equipment and work-piece defects.

The present invention discloses a stereoscopic transition structure based on an air gap waveguide in a complex feed network, and belongs to microwave components. The stereoscopic transition structurecomprises a top plate, an intermediate plate and a bottom plate, wherein the intermediate plate is arranged between the top plate and the bottom plate in fixed connection to each other. In particular,the present invention adopts an ideal conductive wall, an artificial magnetic wall, ridge gap waveguide structures, air gap waveguide-coupling gap match structures, rectangular waveguide transition structures, national standard BJ400 rectangular waveguide coupling gaps and electromagnetic band gap EBG structures. The electromagnetic wave can only be transmitted along the specific guide structureformed by the rectangular waveguide transition structures and the ridge gap waveguide structures of the top plate, the air gap waveguide-coupling gap match structures and the national standard BJ400 rectangular waveguide coupling gaps, the electromagnetic band gap EBG structures are periodically arranged around the ridge gap waveguide for limiting the leakage of electromagnetic wave to the surrounding. The present invention achieves transmission characteristics with low insertion loss over a wide bandwidth.

The invention relates to cement-based magnetic paint as well as a preparation method and application thereof. The magnetic paint takes cement, quartz sand, glue, magnetic micro-powder and other cheapmaterials as main raw materials and adopts a thickening agent, a water reducing agent, a dispersing agent, a de-foaming agent, a leveling agent and other auxiliaries for formula optimization. Comparedwith common resin-based magnetic paint, the cement-based magnetic paint provided by the invention has the advantages of good aging resistance and flame retardant property; as the main raw materials are the cheap raw materials, the cost of the magnet paint is significantly reduced. The green and environmentally-friendly magnet paint has wide application prospect in the fields of magnetic walls, magnetic glass mats, magnetic sheets and the like.

A device with adjustable resistance includes two magnetic elements separated by an insulating or semi-conductor element. The resistance of the device depends on the position of a magnetic wall in one of the magnetic elements, the magnetic wall separating two areas of said magnetic element each having a separate homogeneous direction of magnetization. The device comprises means for moving the magnetic wall in the magnetic element by applying a spin-polarized electric current, such that the resistance of the device is adjustable in a continuous range of values. The invention is useful in neuromimetic circuits, neural networks and bio-inspired computers.

The invention relates to a magnetic adsorption force self-adaption adjusting device and method based on spring deformation. The magnetic adsorption force self-adaption adjusting device and method based on spring deformation are used for non-contacting type permanently-magnetic wall-climbing bogies. The defect that an existing adsorption force adjusting device cannot achieve self-adaption real-time adjustment is overcome, and direct testing and controlling and adjusting of magnetic adsorption force are achieved. According to the technical scheme, an adsorption mechanism and a lifting mechanism of the self-adaption adjusting device are installed on the lower portion of a chassis of a bogie, the adsorption mechanism is connected through springs, motion paths are stipulated in the interiors of the springs through sliding guiding rods, a lead screw of the lifting mechanism is connected with a nut fixed to a corresponding brass plate, and a displacement sensor is connected to each plate; a moving mechanism is installed on the positions on the two sides and at the bottom of the bogie; and a control feedback system is installed on the upper portion of the chassis of the bogie, detected information is processed by the system and then transmitted to a controller, and obtained signal data are compared. By changing the deformation quantity of the springs, magnetic adsorption force self-adaption adjusting is achieved. The magnetic adsorption force self-adaption adjusting device has the advantage of being flexible in motion and large in loading, and the magnetic adsorption force self-adaption adjusting device can be applied under complex working conditions owing to the fact that magnetic adsorption force is directly adjusted to control adsorption force.