30results about "Magnetic/electric field screening" patented technology

The invention relates to a new textile fabric with self-cleaning, anti-bacterium, mould proofing and radiation-proof functions, which is normal textile fabric through special coating layer process. The hot melt adhesive used in the coating layer accounts for 35 to 85%; the nanometer titanium dioxide power accounts for 1 to 15%; the nanometer mould proofing power accounts for 1 to 15%; the nanometer infrared power accounts for 2 to 8%; the nanometer absorbing material power accounts for 1 to 15%; all the particle sizes of the materials are less than or equal to 35nm. The invention has the advantage of multiple functions.

An electrical cable includes at least one conductor assembly. Each conductor assembly includes at least one inner conductor that extends along a length, an insulator, and a shield layer. The insulator engages and surrounds a surface of the at least one inner conductor. The insulator is composed of a dielectric material. The shield layer engages and surrounds an outer perimeter of the insulator. The shield layer is formed of a conductive plastic material to provide electrical shielding for the at least one inner conductor and flexibility.

The invention discloses a structure for inhibition of electromagnetic wave interference, and a flexible printed circuit comprising the same. The structure for inhibition of electromagnetic wave interference is composed of an insulating layer, an electromagnetic wave absorbing layer, an electromagnetic wave shielding layer and a conductive adhesion layer. The electromagnetic wave shielding layer has a top surface and a bottom surface which are opposite to each other. The electromagnetic wave absorbing layer is formed on the top surface of the electromagnetic wave shielding layer. The insulating layer is formed on the top of the electromagnetic wave absorbing layer. The conductive adhesion layer is formed on the bottom surface of the electromagnetic wave shielding layer. The structure for inhibition of electromagnetic wave interference has electromagnetic wave interference shielding and absorbing functions, exhibits excellent softness and flexibility and is especially suitable for being applied to electronic communication products.

This invention relates to a high fire-retarding electromagnetic wave absorption foam edgetone material including rigid phenolic foam and a wave absorbent, in which, the rigid phenolic foam is taken as the carrier to prepare wedge and the wave absorbent is scattered in the wedge. The preparation method includes: a, preparing resol as the basic material, b, taking the expandable phenolic resin prepared by the resol, a emulsifying agent, vesicant and wave absorbent as component A and a solidifying agent of the resin mixed by inorganic acid and organic acid as component B, c, pouring component A and B together into a wedge model cavity, d, controlling the temperature of the cavity at 50-70deg.C to be foamed and molded and the foam is aged for 60-90min in the cavity.

The present invention provides conductive aramid paper which has a metal layer on the surface of aramid paper that contains aramid short fibers, aramid fibrids and a conductive filler. This conductive aramid paper has a resistance of 0.01-0.10 Omega/cm2 in the thickness direction.

An integrated electronic component includes a ceramic substrate incorporating circuit elements and/or having circuit elements mounted thereon, and a metal case mounted on the ceramic substrate. Notches are formed in substrate-facing segments of the metal case at the positions opposing the corners of the top surface of the ceramic substrate. The notches have a tapered shape having obtuse angles with respect to the top surface of the substrate. The notches may have a substantially circular arc shape. The substrate-facing segments having the notches are seamlessly connected to side segments of the metal case, bent in the vicinity of the notches, and supported by the bent portions in a cantilevered fashion.

The invention provides a cable routing box for an intelligent electronic device of a substation. A plurality of metal ends grounded nearby in multiple modes are arranged on the outer wall of a box body of the routing box, a metal groove is formed in each of two side walls of the box body, a shielding reed is arranged in each metal groove, and two side walls of an upper cover plate are paint-free naked metal. Compared with the prior art, the cable routing box for an intelligent electronic device of a substation obviously weakens the direct influence of transient enclosure voltage rise in a distributed grounding mode, greatly reduces transient current excited thereon, and then reduces disturbance voltage induced on internal cables; the routing box is easy to install and maintain to special structural design of the box body, and the shielding effect of the cable routing box is improved while the influence of enclosure ground potential rise of a GIS (Gas Insulated Switchgear) on the cable of the intelligent electronic device is reduced.

The invention belongs to the technical field of electrochemical materials, and particularly relates to a preparation method of an electromagnetic shielding heat dissipation film. The method comprisesthe following steps of obtaining carbon nanotube films and graphene films; after at least one layer of the carbon nanotube films and at least one layer of the graphene films are alternately laminated,performing hot pressing treatment in a protective gas atmosphere of 2,800-3,000 DEG C for 8-10 hours to obtain a laminated function layer of carbon nanotubes and graphene; obtaining a base layer, andattaching the laminated function layer to one side surface of the base layer by using an adhesive; and obtaining a heat conduction adhesive, and applying the heat conduction adhesive to the other side surface, away from the base layer, of the laminated function layer to form a heat conduction adhesive layer, and obtaining the electromagnetic shielding heat dissipation film. The preparation methodof the electromagnetic shielding heat dissipation film is simple in process, easy to operate and convenient for industrial production and application.

The invention provides a stack type baseplate structure. The stack type baseplate structure comprises a baseplate unit, a first frame body, an electric conductor unit and a blocking body unit, wherein the baseplate unit comprises a first baseplate and a second baseplate; the first frame body is arranged between the first baseplate and the second baseplate; the electric conductor unit comprises a plurality of first electric conductors and a plurality of second electric conductors; the first electric conductors are respectively connected with the first baseplate and the first frame body through soldering tin; the second electric conductors are respectively connected with the second baseplate and the first frame body through soldering tin; and the first electric conductors are electrically connected with the second electric conductors. The blocking unit comprises a first blocking body and a second blocking body, the first blocking body surrounds the first electric conductors, the second blocking body surrounds the second electric conductors, the first blocking body is closely fitted between the first baseplate and the first frame body through soldering tin, and the second blocking body is closely fitted between the second baseplate and the first frame body through soldering tin.

The invention relates to a photovoltaic inverter which comprises a cabinet body, a power module, a filter module, a transformer module, a control plate module, a circuit breaker and a contactor, wherein the power module is arranged in the cabinet body; a plurality of beams for supporting and fixing the power module, the filter module and the transformer module are arranged in the cabinet body; the transformer module is arranged at the lowest part in the cabinet body; the filter module, the contactor and the circuit breaker are arranged on the transformer module; the power module and the control plate module are arranged at the uppermost part in the cabinet body; the power module is arranged on a fixed panel of the power module; the lower end of the power module is provided with a heat radiator; the fixed panel of the power module is fixed to a fixed beam of the power module in the cabinet body; the control plate module is arranged in the front of the power module in the cabinet body; the filter module is arranged on the fixed beam of the filter module under the power module; the circuit breaker is arranged on an installation panel of the circuit breaker; the installation panel of the circuit breaker is arranged under the control plate module; the contactor is arranged on a copper plate installation panel; the copper plate installation panel is arranged under the installation panel of the circuit breaker; a copper plate is connected with the circuit breaker; the contactor is connected with the circuit breaker by a lead; and a ground lead copper plate is arranged on the copper plate installation panel.

The invention discloses a circuit board with a static protection structure, which comprises an I/O interface, a static protection device, a discharge circuit, a protection ground area and a working ground area. The protection ground area surrounds the outer side of the working ground area, the discharge circuit is connected between the two areas, and the protection ground area at least comprises one positioning hole, wherein the positioning hole is used for fixing the circuit board and introducing the static electricity of the protection ground area into a ground line or the ground; and the ground wire end of the I/O interface is connected with a static protection device and the positioning hole in series in sequence. The danger of static electricity on the circuit can be effectively prevented by using the scheme; because the structure of the circuit board is provided with a circle of unclosed metal conducting layer, electromagnetic interference can also be effectively prevented, and the electromagnetic compatibility of the circuit board is enhanced.

A flexible PC board made through a water cleaning process includes a substrate prepared from polymers or copolymers such as PET, PI, PP, PS, PMMA, PC, PU, PBT, ABS, nylon, etc. A release layer prepared from a hydrophilic material and printed on the substrate to leave a blank zone on the substrate according to a predetermined circuit pattern, and a conduction layer bonded to the blank zone to form a circuit pattern. An electroplating process may be employed to increase the thickness of the circuit pattern formed of the conduction layer. Through a water cleaning process, the release layer is removed from the substrate, and the desired flexible PC board is obtained for bonding to a member of an electronic product by means of injection or pressure casting molding.

Embodiments of the invention disclose an electromagnetic interference control method and a related product. The method comprises when electronic equipment is in a payment scene, obtaining the first sampling frequency of a biological recognition sensor, obtaining the first MIPI working frequency of a display screen MIPI, determining whether the first sampling frequency is interfered according to the first MIPI working frequency, if yes, determining the second sampling frequency, without being interfered by the first MIPI working frequency, of the biological recognition sensor, and adjusting thesampling frequency of the biological recognition sensor to be second sampling frequency, so that the sampling frequency of the biological recognition sensor can be adjusted dynamically when the electronic equipment is in the payment scene under the condition of without changing the hardware design of the electronic equipment, the electromagnetic interference of the working frequency of the display screen MIPI on the biological recognition sensor is eliminated or reduced, and the accuracy of identification is guaranteed, so that preferable user payment experience is realized.

A digital broadcasting reception device capable of accommodating a plurality of types of substrates having different mounting positions of parts in a common shielding case, having a higher degree of freedom and intended to reduce costs is provided. Inside a digital television is provided a metal shielding case wrapping around a substrate mounted with an electronic part and a detachable separation section in the shielding case. When accommodating a digital substrate having substantially the same size as that of this shielding case in the shielding case, the digital substrate is accommodated as is, and when a digital tuner mounted on the digital substrate which is smaller than this digital substrate exceeds the height of the shielding case, the digital tuner is placed at the position where the separation section is detached from the shielding case.

The invention relates to a multifunctional device with electrochromic, electric heating and electromagnetic shielding functions. The multifunctional device comprises an electrochromic module, a connecting part, an electric heating and electromagnetic shielding module and a control module, wherein the connecting part is connected to one side of the electrochromic module; the electric heating and electromagnetic shielding module is connected to the other side of the connecting part, and the electrochromic module is connected to the electric heating and electromagnetic shielding module through the connecting part in order to form an integrated structure; and the control module is connected to the electrochromic module and the electric heating and electromagnetic shielding module, and the control module is used for respectively controlling the color changing of the electrochromic module and the heating and electromagnetic shielding of the electromagnetic shielding module. The electrochromic module is connected to the electric heating and electromagnetic shielding module through the connecting part in order to form the integrated structure, and the multifunctional device has the electrochromic, electric heating and electromagnetic shielding functions, and diversified functions and structural forms, so that the use requirements of different occasions can be met.

A method for forming metal members on a casing, includes steps of providing the casing of an electron device; selecting at least two areas on a common surface of the casing; forming, by an electroplating way, a metal layer on all of the selected areas; and forming, by a patterning way, the metal layer respectively with different metal member pattern layers on different selected areas, wherein the metal member pattern layers are selected from the group consisting of an antenna member pattern, a ground wire member pattern, and an electromagnetic shielding member pattern, so as to use these members as an antenna member, a ground wire member, or an electromagnetic shielding member of the electron device.

The invention relates to an X-wave band meta-material absorber based on a dendritic structure. The meta-material absorber comprises a metal electric dendritic resonator, a medium base plate and a metal film. The characteristic of completely absorbing electromagnetic waves being vertically incident upon the surface of the meta-material can be realized by reasonably designing the geometry dimension and the lattice period of a metal dendritic unit. The meta-material absorber has the advantages of high absorption efficiency, simple structure, small volume, plane two-dimension omni-direction and the like. The absorber can be used as a high-efficiency electromagnetic heating device and can also be applied to electromagnetic wave collecting and detecting devices, such as radiant heat measuring devices.

The invention relates to an electric protection door controller for civil air defense construction, which mainly comprises an anti-explosion operation cabinet, a touch screen, a program logic controller (PLC), an anti-explosion calling device, a middle relay, an alternating current contactor, a wiring terminal bar, an electric protection door, a hot air blower, an electric ball valve, a position limiting switch and a temperature and humidity sensor and is characterized in that the controller adopts the anti-explosion cabinet as a cabinet body and uses the PLC as a core controller, the electric protection door controller concretely comprises an optoelectronic isolation module, an input module, an output module and an analog-to-digital (A/D) conversion module. The device provided by the invention adopts various electromagnetic pulse protection measures, also adopts anti-corrosion and moisture-proof measures and ensures that a system can safely and reliably work in the nuclear electromagnetic pulse and the civil air defense construction.

An electronic device is provided that has a vertical chassis wall with an aperture, a horizontal circuit board that extends toward the vertical chassis wall, F-connector connected to the horizontal circuit board and extending out of the a vertical chassis wall through the aperture and dual height inner RF shield that covers part of the F-connector and other electronic components. The height of the RF is greater over the F-connector than over some of the other electronic components.

The invention provides a chitin@MXene@Ni chain thin film material and a preparation method and application thereof. According to the chitin@MXene@Ni chain thin film material, chitin, few layers of MXene and Ni chains serve as raw materials. The thin film material is prepared from chitin, MXene and Ni chains with the mass percentage of 50 to 20-30 to 30-50, and a chitin@MXene@Ni chain thin film is finally obtained through suction filtration and hot pressing. The preparation method of the composite material has the characteristics of stability, controllability, simplicity and easiness in operation, and the material has the characteristics of thin thickness and strong electromagnetic wave shielding capability. Therefore, the invention provides a novel thought for design and synthesis of industrial production of electromagnetic wave shielding materials.

The invention discloses a special-shaped shielding device, which comprises a left shielding body, a right shielding body and clamps, wherein the left shielding body and the right shielding body are in a hollow irregular hemi-spherical shape on the whole, and form a hollow irregular sphere after being fastened; conducting rod through holes of inflected arc-shaped surfaces are arranged at two sides of the sphere; operation holes of the inflected arc shaped surfaces are arranged at the bottom part of the sphere; the clamps are arranged on the edges of the conducting rod through holes at two sides; and the left shielding body and the right shielding body are connected with a conducting rod through the clamps. The special-shaped shielding device can effectively solve the shielding problem of a three-dimensional or multi-dimensional electric field of AC/DC extra-high voltage electrical equipment, is simple in structure and convenient to install and dismantle, and working hours are greatly reduced and the efficiency is improved.

The invention discloses an iron-based wave-absorbing film and a preparation method thereof, and belongs to the technical field of wave-absorbing materials. The preparation method comprises the following steps: (1) uniformly mixing epoxy resin and an iron-based material in a kneading machine to obtain slurry; and (2) carrying out calendaring molding on the slurry to obtain the iron-based wave-absorbing film, wherein the weight ratio of the epoxy resin to the iron-based material is 1: (0.5-8). By implementing the method, the iron-based wave-absorbing film with high uniformity can be obtained.

A semiconductor device is provided that has high electromagnetic wave shielding properties while exhibiting good heat dissipation. The semiconductor device includes a semiconductor package bonded onto a circuit board, an electromagnetic wave absorbing layer covering surfaces of the semiconductor package other than a surface bonded to the circuit board, and an electromagnetic wave reflecting layer covering the electromagnetic wave absorbing layer on a side remote from the semiconductor package, in which the electromagnetic wave absorbing layer is made of resin containing magnetic particles or carbon, and the electromagnetic wave reflecting layer is made of resin containing conductive particles.

The invention provides an electromagnetic shielding cooling device, which comprises a frame main body (10). The making materials of the frame main body (10) comprise metal; the frame main body (10) has one or more cylindrical shielding cavities (11); the shielding cavity (11) is used for accommodating a shielded object; a plurality of frame channels (12) are distributed in the frame main body (10); and a heat transfer medium is in the frame channel (12). The electromagnetic shielding cooling device provided in the invention has good electromagnetic shielding and cooling functions at the same time.

This method for manufacturing a shield printed wiring board includes: a step for preparing a printed wiring board body having a base substrate, a ground wiring provided on the base substrate, and an insulating layer covering the ground wiring and being provided with an opening so that a part of the ground wiring is exposed; a resist placement step for placing a resist resin in a predetermined pattern shape on the insulating layer; a metal layer formation step for providing a metal layer on the ground wiring exposed through the opening and on the printed wiring board body on which the resist resin is placed; and a step for removing the resist resin using a solvent, whereby the portion of the metal layer provided on the resist resin is removed along with the resist resin, and the metal layerpresent on portions other than the predetermined pattern shape is formed as a shield layer.