43results about How to "Enhance the strength of the electromagnetic field" patented technology

The invention discloses a method for designing an antenna which can enlarge the reading range of a low frequency or high frequency RFID system. A plurality of pairs of space-separated reader antennas are connected through a multi-antenna search-read interface circuit. The method is characterized in that the coils of each pair of reader antenna are composed of a plurality of small coils connected in a manner of combining parallel connection with series connection; the current directions of adjacent edges of adjacent small coils are opposite; an impedance matching circuit is capacitive and resonates on the work frequency of the reader with inductive antenna coils. The small coils can be produced into shapes of a triangle, a rectangle, a square, a circle, an oval and a polygon, and a plurality of small coils match with the shape of the antennas after the combination of the parallel connection and the series connection according to the shapes of the areas the antenna needs to cover.

The invention discloses a magneto-rheological elastomer double-annular-membrane damper which comprises a work cylinder, a damping rod, large annular damping membranes, small annular damping membranes, an annular damping washer and two single-face annular electromagnets. The work cylinder comprises a drum and the two single-face annular electromagnets, the two single-face annular electromagnets are fixed to the two ends of the drum, and opposite poles of the two single-face annular electromagnets are opposite in direction. The large annular damping membranes and the small annular damping membranes are respectively composed of a magneto-rheological elastomer, the inner circumferences of the small annular damping membranes are fixed to outer circumferences of the tops of inner circular tubes, the inner circular tubes are fixed into center holes of the single-face annular electromagnets, the outer circumferences of the small annular damping membranes are fixed to the inner circumference of the annular damping washer, the outer circumference of the annular damping washer is fixed to the inner circumferences of the large annular damping membranes, and the outer circumferences of the large annular damping membranes are fixed to the inner circumference of a work cylinder circular tube. One end of the damping rod is fixed to the annular damping washer through a support, and the other end of the damping rod extends out of one end of the work cylinder through sliding bearings in the circular tubes, at one end of the work cylinder, of the single-face annular electromagnets.

The invention discloses a wireless charging method. A wireless charger comprises a wireless charging emitting end and a wireless charging receiving end. The method is characterized by comprising the following steps of: (1) arranging a radiating shell at the wireless charging emitting end; (2) arranging a magnetic plate on the inner surface of the radiating shell to generate magnetic induction intensity; (3) arranging at least three induction coils, wherein the induction coils are arranged in a triangular form; (4) arranging a power adapter which is connected with the induction coils through leads and is used for supplying a working power supply to the induction coils; and (5) arranging an NTC (Negative Temperature Coefficient) control device which is connected with the coils and a charger control circuit and is used for controlling the magnitude of charging current by monitoring the temperature of a magnetic core. The invention further discloses a wireless charger for implementing the method. The method and the charger provided by the invention have the advantages of working stability, high working efficiency, high reliability, and capability of supporting high-power charging equipment.

The invention discloses an ordered nanostructured precious metal array, and a preparation method and a use thereof. The array is characterized in that projections with the height positioned in hexagons being not greater than 20nm are arranged at the column ends of a nanometer hexagonal prism for composing a gold-silver alloy nanometer hexagonal prism array or a porous gold nanometer hexagonal prism array, the column structure cycle of the nanometer hexagonal prism is 470-500nm, the column height of the nanometer hexagonal prism is 50-200nm, the column wall of the nanometer hexagonal prism has a concave arc shape, and the column gap of adjacent nanometer hexagonal prisms is 5-50nm. The method comprises the following steps: producing a through-hole alumina template with the hole diameter of 160-380nm, the hole cycle of 470-500nm and the hole gap of a hexagonal concave-convex structure array by using a two-stage anode oxidation technology, coating the through-hole alumina template as a die on a gold-silver alloy film or a porous gold film, and applying a pressure being not greater than 5.7*10<6>N/m<2> to the through-hole alumina template to prepare a target product. The ordered nanostructured precious metal array can be used as a surface enhanced Raman scattering active substrate, and the content of rhodamine or methyl parathion or polychlorinated biphenyl-3 adhered on the active substrate can be measured by using a laser Raman spectrometer.

The invention provides a flexible conductive coil used for conducting electromagnetic induction processing on fluid. Each turn of the coil is located in the same two-dimensional plane, the two-dimensional plane comprises a first direction and a second direction perpendicular to the first direction, and the coil can be curved in the third direction perpendicular to the two-dimensional plane. The invention further provides a related coil combination, metal wire structure, coil assembly and electromagnetic induction processing device. The invention further provides a method for conducting electromagnetic induction processing on the fluid. According to the flexible conductive coil used for conducting electromagnetic induction processing on the fluid, the coil is designed into a special shape, so that the coil can be easily arranged on a fluid pipeline, the magnetic induction effect generated by a magnetic field produced by the coil on the fluid flowing through the pipeline is multiplied, and the magnetic induction processing effect on the fluid can be basically maximized.

The invention relates to a fast wireless rechargeable system for a mini unmanned aerial vehicle. The system includes a wireless charging transmitting end which comprises a wireless charging transmitting module, a transmitting end coil and a transmitting end communication module, and a fast rechargeable battery for the unmanned aerial vehicle, the fast rechargeable battery for the unmanned aerial vehicle is arranged in the unmanned aerial vehicle and comprises a voltage control module, a receiving end communication module and multiple sets of micro rechargeable battery assemblies, and each assembly includes micro charging modules, small batteries and micro coils, wherein the micro coils receive energy, then conduct rectification through the micro charging modules, and then charge the smallbatteries; the voltage control module controls the charging voltage of each small battery, and the receiving end communication module monitors a receiving voltage and feeds back to the transmitting end communication module; each set of the small lithium batteries and the micro coils are placed in parallel, and the parallel placement of the multiple micro coils makes each coil be an intensifier.

The invention belongs to the field of wireless communication and relates to an antenna device used in a short-distance wireless communication system. The antenna device is the antenna device formed in mobile electronic equipment, and comprises a coil conductor, a flexible substrate, a magnetic material and a housing conductor layer, wherein the coil conductor is an annular or helical coil employing a winding center part as a coil opening part; the coil conductor and the flexible substrate which is attached to the coil conductor are assembled on the surface of a magnetic sheet material; the coil conductor is shielded and divided into two areas by the housing conductor layer; the first area is a non-shielding part of the housing conductor layer, namely an actual magnetic link coupling part of the antenna; a narrow linewidth design is adopted by the coil conductor of the part or the narrow linewidth design is mainly adopted; a dual-conductor layer parallel design is adopted; the second area is a shielding part of the housing conductor layer; and a wide line design is adopted by the coil conductor of the area. The antenna device has the beneficial effects that the structural integrity of the metal part of a mobile equipment housing is not destroyed; the occupied space is small; and the performance is high.

The invention discloses a novel gallium telluride(GaTe)-based surface-enhanced Raman substrate and a preparation method thereof. A substrate structure is, in order from a bottom to a top, an Au layer,a two-dimensional thin layer GaTe layer and an Au nanoparticle layer. A heterostructure is formed by the two-dimensional thin layer GaTe layer and the Au layer. The preparation method comprises: growing a Ti layer and the Au layer on a SiO<2> /Si substrate layer through a thermal evaporation method, using a mechanical peeling method to prepare the two-dimensional thin layer GaTe layer, using a transfer platform to transfer the same onto the Au layer, and finally, immersing the substrate in an HAuCl<4> solution to prepare the Au nanoparticle layer. The substrate is benefited from higher defectdensity of GaTe material, a coverage rate of gold nanoparticles formed by self-assembly on the two-dimensional thin layer GaTe layer can reach 98%, and thus very strong local surface plasmons can begenerated among the gold particles. At the same time, a gold layer under the two-dimensional thin layer GaTe layer can also generate surface plasmons under illumination, strength of an electromagneticfield among the gold nanoparticles is enhanced, and a Raman enhancement effect is greatly improved.

The invention discloses a novel electromagnetic type vibration isolator with the adjustable negative stiffness. The novel electromagnetic type vibration isolator comprises a stator shell (5), a mover(8) and a positive stiffness component, wherein the positive stiffness component is assembled below the mover (8) and plays a positive stiffness role for the mover (8). The novel electromagnetic typevibration isolator further comprises permanent magnets (9) arranged on the first layer and permanent magnets (9) arranged on the second layer, wherein the permanent magnets (9) are assembled on the outer side wall of the mover (8) and arranged in the longitudinal axis direction of the mover (8). The facing direction of the polarity end face of a permanent magnetic field formed by the permanent magnets (9) arranged on the first layer and the permanent magnets (9) arranged on the second layer is the radial direction, and the permanent magnets (9) arranged on the first layer and the permanent magnets (9) arranged on the second layer are opposite in polarity. The novel electromagnetic type vibration isolator further comprises a coil assembly, wherein the coil assembly is assembled on the innerside wall of the stator shell (5). The coil assembly comprises a coil (3) and coil yokes (10), wherein the winding axis of the coil (3) is the longitudinal axis, and the coil yokes (10) are arrangedat an upper coil opening and a lower coil opening of the coil. The vibration isolator is arranged based on the electromagnetic acting force among the permanent magnets and electromagnets.

The invention discloses a metal micro-/nano-sensing device and belongs to the field of photoelectric sensors. The device comprises a silica substrate layer, wherein a metal film is arranged on the silica substrate; a metal hemispherical shell is arranged on the metal film; and the metal hemispherical shell is periodically arranged on the metal film. Compared with the prior art, the metal micro-/nano-sensing device disclosed by the invention has the advantages that large-area and high-intensity electromagnetic field distribution is obtained by virtue of the coupling action of the metal film and the metal micro-/nano hemispherical shell, and the metal micro-/nano-sensing device is sensitive to the near-field refractive index change, can operate in a near-infrared band, easily realizes monolithic integration and has good application prospects in the fields of biology, medicines and chemical sensors.

The invention discloses a preparation method of a porous nano alpha-Fe2O3/Ag negative electrode material in the technical field of preparation of lithium batteries, raw materials comprise ferric salt, a surfactant, acetate, a solvent, a pore-forming agent and silver nitrate, firstly, the ferric salt, the surfactant, the acetate, the solvent and the pore-forming agent are mixed through a hydrothermal method to prepare porous nano alpha-Fe2O3; and depositing Ag nano particles formed by silver nitrate in pore channels of alpha-Fe2O3 through a hydrothermal method to obtain the porous nano alpha-Fe2O3/Ag negative electrode material. Compared with the prior art, the preparation time is greatly saved, the nano-porous morphology can be obtained through the method, acetate can adjust the size of iron oxide particles and reduce the size of iron oxide, holes are formed in the roasting process after the pore forming agent is added, Ag nano-particles can be deposited into pore channels of iron oxide, the conductivity of the material is higher, and the material is more suitable for large-scale production. And the electrical performance of the lithium battery is further enhanced.

The invention provides a dielectric waveguide filter and a manufacturing method thereof, and relates to the field of filters. The dielectric waveguide filter comprises a dielectric body, a first frequency modulation blind hole, a second frequency modulation blind hole and a negative coupling structure, the first frequency modulation blind hole and the second frequency modulation blind hole are formed in the dielectric body, the negative coupling structure is arranged on the dielectric body and located between the first frequency modulation blind hole and the second frequency modulation blind hole, and a conducting layer is arranged on the surface of the dielectric body; the negative coupling structure comprises a negative coupling blind hole, a negative coupling blind groove and a communicating hole, the axial direction of the negative coupling blind hole is parallel to the axial directions of the first frequency modulation blind hole and the second frequency modulation blind hole, thenegative coupling blind groove is formed in the opposite side, back to the negative coupling blind hole, of the dielectric body, and the communicating hole is connected between the negative couplinghole and the negative coupling blind groove; and an insulating ring region is arranged on the inner wall of the communicating hole. When the boundary dimension of the communicating hole changes, the shapes and dimensions of a signal propagation channel and the insulating ring region change at the same time, so that the coupling amount can be adjusted in a larger range, and the performance of the whole filter is better.

A system for generating plasma of the invention includes reaction chamber; wafer chuck disposed in the reaction chamber; a first coil on the upper and top of the reaction chamber; radio frequency power source which output radio frequency current to incite the first coil to generate plasma; and a second coil disposed on the lower of the reaction chamber. The system of the invention for generating plasma can generate more homogeneous plasma.

The invention discloses an electric hammer component. The electric hammer component comprises an upper cover, a lower cover, a bobbin, a coil wound around the bobbin, an iron core and a massage head,the coil and the bobbin are arranged between the upper cover and the lower cover, the bobbin is provided with a through hole, the massage head comprises a beating head portion, a magnet and the iron core, the beating head portion, the magnet and the iron core are sequentially connected into a whole in series, the magnet and the iron core reciprocate in the through hole, and the beating head portion is exposed from the upper cover. According to the electric hammer component, the magnet is additionally arranged to replace an iron frame to enhance the intensity of a magnetic field, and forced beating is realized without increasing the turns per coil; because the iron frame is omitted, the size of the whole electric hammer component becomes smaller, and an extra electric shock risk caused by electrification of the iron frame is avoided. The invention further provides an electric hammer type massage shawl with the electric hammer component.

The invention discloses a silicon-based thin film solar cell with a double-layer split grating structure. The silicon-based thin film solar cell comprises an Ag substrate layer, and an AZO passivation layer, a lower grating layer, a silicon absorption layer, an upper grating layer and an AZO anti-reflection layer are arranged on the Ag substrate layer in a layer-by-layer mode. The lower grating layer and the upper grating layer respectively comprise at least one grating period, and each grating period is formed by sequentially and alternately arranging Si strips and AZO strips along the width direction of the silicon-based thin film solar cell. In the structure of the silicon-based thin-film solar cell, phase mismatching and width unequal between the upper grating layer and the lower grating layer can form more diffraction orders, so that the light absorption efficiency of the silicon-based thin-film solar cell in a full wave band is improved, and particularly, the absorption efficiency of the silicon-based thin-film solar cell in a near-infrared wave band is obviously improved.