146results about "Screening rooms/chambers" patented technology

The invention discloses an EMC filtering electromagnetic shielding structure which comprises a machine shell, a shielding wall, a top cover arranged on the machine shell, a filtering assembly and a main power assembly, the filtering assembly and the main power assembly are arranged in the machine shell, and a filtering cavity and a main power cavity which are separated by the shielding wall are arranged in the machine shell. The filtering assembly is arranged in the filtering cavity, the main power assembly is arranged in the main power cavity, and the shielding wall and the top cover are in metal connection with an electromagnetic shielding effect. The EMC filtering electromagnetic shielding structure has the advantage of being good in electromagnetic shielding effect. The invention further provides a vehicle-mounted charger adopting the EMC filtering electromagnetic shielding structure.

In some implementations, a conductive concrete composition for providing improved shielding against electromagnetic radiation comprises cement, one or more supplementary materials, aggregates, one or more carbon products, and fibers. In some implementations, the composition comprises between about 5% and about 40% by weight of cement, between about 1% and about 20% by weight of one or more supplementary materials, between about 5% and about 80% by weight of aggregates, between about 1% and about 40% by weight of one or more carbon products, and between about 1% and about 10% by weight of fibers. In some embodiments, the one or more supplementary materials comprises ground granulated blast furnace slag (GGBS), the one or more carbon products comprises graphite, and the fibers comprise steel fibers. The aggregates can include normal weight, lightweight, and / or fine aggregates.

A portable shelter with electromagnetic interference (EMI) protection includes a plurality of walls that define an interior space. The walls can be fixed or movable. An EMI protected edge connector joins at least two of the walls together. The EMI protected edge connector assembly can be fixed or hinged. The edge connector can include a metallic outer edge member with two legs and a separate metallic inner edge member with two legs to define an edge channel therebetween with: (i) the first outer leg and the first inner leg are arranged parallel and spaced-apart relative to each other; and (ii) the second outer leg and the second inner leg arranged parallel and spaced-apart relative to each other. The shelter walls can include an inner surface covered by a metallic foil inner layer. A first wall panel is received in a first portion of the edge channel with its metallic foil inner layer contacting the inner edge member and a second wall panel is received in a second portion of the edge channel with it metallic foil inner layer contacting the inner edge member.

GaAs IR window slabs having largest dimensions that are greater than 8 inches, and preferably greater than 12 inches, are grown using the Horizontal Gradient Freeze (HGF) method. Heat extraction is simplified by using a shallow horizontal boat that is only slightly deeper than the desired window thickness, thereby enabling growth of large slabs while also minimizing material waste and fabrication cost as compared to slicing and shaping thick plates from large, melt-grown boules. Single crystal seeds can be used to optimize the final orientation of the slabs and minimize secondary nucleation, thereby maximizing yield. A conductive doped GaAs layer can be applied to the IR window slab to provide EMI shielding. The temperature gradient during HGF can be between 1° C. / cm and 3° C. / cm, and the directional solidification can be at a rate of between 0.25 mm / h and 2.5 mm / h.

A method of manufacturing a structurally competent, EMI-shielded IR window includes using a mathematical model that combines the Sotoodeh and Nag models to determine an optimal thickness and dopant concentration of a doped layer of GaAs or GaP. A slab of GaAs or GaP is prepared, and a doped layer of the same material having the optimal thickness and dopant concentration is applied thereto. In embodiments, the doped layer is applied by an HVPE method such as LP-HVPE, which can also provide enhanced GaAs transparency near 1 micron. The Drude model can be applied to assist in selecting an anti-reflective coating. If the model predicts that the requirements of an application cannot be met by a doped layer alone, a doped layer can be applied that exceeds the required IR transparency, and a metallic grid can be applied to improve the EMI shielding, thereby satisfying the requirements.

A door assembly provides EMC shielding to provide EMI / RFI protection. The door assembly has an EMC door frame, an EMC door, and EMC seals for maintaining a circuit between the door frame, the floor (e.g., threshold, flooring, etc.), and / or the door. The door assembly may also utilize one or more EMC elements (e.g., EMC tape, paint, adhesive, coatings, caulk, etc.) that may be used to create the circuits between the components of the door assembly and / or with other components of the building (e.g., between the door frame and the wall). The EMC shielding is used to reduce (e.g., limit, block, etc.) the levels of electrogenic interference (EMI) / radio frequency interference (RFI) radiation that is able to pass by the shielding. Moreover, the door assembly also provides improve additional door assembly performance (e.g., sound, weather, air flow, heat, cold, or the like abatement, energy harvesting, or other performance benefits).

The invention relates to a magnetic field gradient suppression method in a magnetic shielding chamber, and the method comprises the steps: placing five gradient coils in the magnetic shielding chamber in parallel, and dividing a target region in the magnetic shielding chamber into NUM points; acquiring a target area magnetic field distribution function in the magnetic shielding chamber; and uniformly dispersing the function into NUM coordinate points to obtain a least square error function about magnetic field distribution of the target area, and solving the least square error function by adopting Tikhonov regularization to obtain a coefficient matrix Pmn so as to design a gradient coil. According to the invention, five groups of gradient coils are simultaneously designed to inhibit the gradient magnetic field in the magnetic shielding chamber, after excitation is applied to the gradient coils, the gradients of three components of the magnetic field along three directions are obviously reduced, and the gradient magnetic fields in all directions in the magnetic shielding chamber can be effectively inhibited through the design of the gradient coils.

An enclosure to protect people and instruments from the effects of an electromagnetic pulse (EMP) is provided. The enclosure includes a floor assembly; walls extending upward on a first, second, third, and fourth side of the floor assembly; a roof; and a ceiling. On the interior of the enclosure, a shield layer is provided such that the enclosure forms a six-sided Faraday cage. Fasteners and other conductive securement materials such as copper tape help achieve the conductivity of the shield layer. Extending through the walls of the enclosure may be secure points of entry allowing for people, air, and conductors to securely enter and exit the enclosure. The enclosure contains a grounding system to assist with protecting the contents of the enclosure from the effects of the EMP.

The invention relates to the technical field of electromagnetic shielding rooms, and discloses a load-bearing framework and shielding panel integrated electromagnetic shielding room, which comprises a first structural shielding unit and a second structural shielding unit, the first structural shielding unit and the second structural shielding unit are alternately arranged, the first structural shielding unit comprises a first load-bearing framework, and the second structural shielding unit comprises a second load-bearing framework. The first structural shielding unit comprises a first load-bearing frame, the second structural shielding unit comprises a second load-bearing frame, the edges of the adjacent first load-bearing frame and second load-bearing frame are spliced through a multi-dimensional interlocking structure, so that an electromagnetic shielding room load-bearing framework is defined, and the splicing seam of the first load-bearing frame and the second load-bearing frame is provided with at least one zigzag electromagnetic wave attenuation path. The load-bearing frames and the electromagnetic shielding function are deeply integrated, the first load-bearing frame and the second load-bearing frame are mechanical load-bearing components, electromagnetic shielding is achieved through zigzag electromagnetic wave attenuation paths of the splicing seams and the magnetic conductive filling materials, an independent shielding framework does not need to be additionally arranged, and the overall structure is simplified.

Provided are methods of forming graphene laminate compositions and architectures. The method comprises: (i) contacting a graphene structure comprising one or more planar graphene sheets with a first interlayer material; (ii) depositing of a conductive material, where in the conductive material is deposited along an edge of the graphene and one end of the first interlayer; and (iii) contacting the graphene structure with a second interlayer material. Also provided are graphene laminates structures comprising doped graphene films having improved mechanical strength, electrical mobility and optical transparency.

The invention discloses an EMC filtering electromagnetic shielding structure which comprises a metal casing, a shielding wall integrally formed with the casing, a cover plate arranged on the casing, a filtering assembly and a main power assembly, the filtering assembly and the main power assembly are arranged in the casing, and a filtering cavity and a main power cavity which are separated by the shielding wall are arranged in the casing. The filtering assembly is arranged in the filtering cavity, the main power assembly is arranged in the main power cavity, and the shielding wall is in interference contact connection with the cover plate. The EMC filtering electromagnetic shielding structure has the advantages of being good in electromagnetic shielding effect and low in cost. The invention further provides a vehicle-mounted charger adopting the EMC filtering electromagnetic shielding structure.

The invention belongs to the technical field of environment detection equipment, and particularly relates to an environment detection vehicle, a leveling method, a terminal and a storage medium, the environment detection vehicle comprises an undercarriage, a vehicle body arranged on the undercarriage and an air suspension arranged between the vehicle body and the undercarriage, a driving cabin and a working cabin are arranged in the vehicle body, and an environment detection platform is arranged in the working cabin; a vehicle body leveling mechanism is mounted at a girder of the undercarriage, and the vehicle body leveling mechanism and the air suspension are both connected with a master controller in the environment detection platform; according to the environment detection vehicle, the vehicle body leveling mechanism is installed at the undercarriage girder and works in cooperation with the air suspension, and the environment detection vehicle can keep the height of the vehicle body stable and horizontal under various complex terrain conditions. By means of the design, vehicle body shaking caused by uneven ground is effectively reduced, it is ensured that the environment detection platform can obtain more accurate data in the operation process, and the accuracy and reliability of environment monitoring are improved.

The invention provides an electromagnetic shielding room special for an aviation product EMC test, and relates to the technical field of electromagnetic shielding rooms, the electromagnetic shielding room comprises a shielding shell, a manual shielding door and a ventilation waveguide window, the manual shielding door is arranged on the shielding shell for debugging personnel to go in and out, and the ventilation waveguide window is arranged on the shielding shell. The ventilation waveguide windows are installed on the side wall face and the top of the shielding shell respectively to achieve ventilation and electromagnetic shielding, the shielding shell is further provided with an overhaul shielding door and a filter, and the overhaul shielding door is used for connection and overhaul of cables in the shielding shell. During use, high-quality 2mm double-sided hot-dip galvanized steel plates are adopted for splicing, high-quality conductive gaskets are used for connecting splicing positions, so that good conductivity is guaranteed, high shielding performance is achieved, meanwhile, a filter is arranged for connecting cables entering and exiting the shielding shell, high-frequency signal components in a circuit are filtered out, a ventilation waveguide window with the cut-off frequency being 18 GHz is configured, and the shielding performance is improved. And the test requirements of aviation products with the working frequency range of 10kHz-18GHz floor noise are met.

A Faraday tent apparatus includes a framework and an enclosure with a door. The enclosure includes a doorway panel having a doorway. The door is movable between open and closed configurations. When the door is in the closed configuration, the Faraday tent apparatus shields an internal compartment from RF and EMI communication with an ambient environment external to the enclosure. The doorway panel has a magnetically-engageable jamb portion. The door has door panel with a magnetically-engageable jamb interface portion extending about a periphery of the door panel. The jamb portion and the jamb interface portion are configured to be in mutual magnetic engagement when the door is in the closed configuration. The jamb interface portion may include a series of nested magnetic tracks. The door includes laterally-extending door stiffener panels sequentially arranged between a door lower end and a door upper end. Associated manufacturing methods are also disclosed.

A magnetically compatible device capable of remotely switching optical filters comprises an outer box, an inner box and an optical filter clamp movable block which are sequentially nested from outside to inside, and the two-stage nesting relation is airtight and tightly attached and can slide mutually. The inner box divides an inner cavity of the outer box into two X-direction airtight cavities, and the optical filter clamp movable block divides the inner cavity of the inner box into two Y-direction airtight cavities; the two Y-direction airtight cavities are respectively communicated with an external air source of the inner box through second air pipe joints, and the Y-direction side wall of the outer box is provided with an air pipe joint guide groove; the two X-direction airtight cavities are respectively communicated with an air source outside the outer box through first air pipe joints; first light holes are formed in the bottom of the outer box; two second light-transmitting holes distributed in the X direction are formed in the bottom of the inner box, and when the inner box slides, the two second light-transmitting holes are aligned with the first light-transmitting holes respectively; when the optical filter clamp movable block slides to the two sides for limiting in the Y direction, the different optical filter fixing grooves are aligned with the second light holes respectively. According to the invention, the optical filter switching can be remotely operated.

In some implementations, a conductive concrete composition for providing improved shielding against electromagnetic radiation comprises cement, one or more supplementary materials, aggregates, one or more carbon products, and fibers. In some implementations, the composition comprises between about 5% and about 40% by weight of cement, between about 1% and about 20% by weight of one or more supplementary materials, between about 5% and about 80% by weight of aggregates, between about 1% and about 40% by weight of one or more carbon products, and between about 1% and about 10% by weight of fibers. In some embodiments, the one or more supplementary materials comprises ground granulated blast furnace slag (GGBS), the one or more carbon products comprises graphite, and the fibers comprise steel fibers. The aggregates can include normal weight, lightweight, and / or fine aggregates.

An electromagnetic insulation device includes a body material, a conductive EMI attenuation layer, and a plurality of conductive elements. The host material is substantially planar and flexible. The EMI attenuation layer is positioned inside the host material. A plurality of conductive elements are positioned in the host material. The EMI attenuation layer and the plurality of conductive elements are configured to be electrically connected to an external ground connection.

An underground utility locator is provided. The underground utility locator includes a wand, a GNSS module, a power module, a smoothing circuit, and a multi-layer enclosure. The wand has a top end and a bottom end and includes at least one antenna configured to output a field strength signal in response to an electromagnetic field. The GNSS module is coupled to the top end of the wand. The power module is coupled to the wand. The multi-layer enclosure at least partially surrounds the GNSS module and includes an outer shell layer and an inner shell layer. The outer shell layer and the inner shell layer are partially separated by an air gap.

The invention relates to the field of electron microscope chamber electromagnetic shielding, and provides a high-precision electron microscope chamber combined shielding method, which comprises the following steps: S1, simulating an electron microscope operation experiment environment to carry out initial state magnetic field measurement, and respectively testing direct current and alternating current magnetic field environment values; s2, adopting a low-carbon steel plate as a shielding shell, and calculating the thickness of the shielding shell based on the tested magnetic field environment value and the target value of the magnetic field environment of the electron microscope equipment; s3, after welding of the shielding shell and installation of the shielding door and the waveguide window are completed, shielding testing is carried out, reinforcing treatment is carried out on weak points and magnetic leakage points, the waveguide window comprises a magnetic waveguide tube and a hexagonal honeycomb vacuum brazing waveguide window, and the magnetic waveguide tube comprises a shell and a grating; and S4, setting an active shielding system, correcting an electron microscope experiment magnetic field environment deviation in an actual operation stage, simultaneously satisfying magnetic field and electromagnetic shielding, optimizing a waveguide window structure, and simultaneously satisfying low-frequency and high-frequency electromagnetic wave shielding.

The invention discloses an electromagnetic shielding shell of an electromagnetic shielding room, which belongs to the technical field of electromagnetic shielding and comprises an electromagnetic shielding room body, a plurality of electromagnetic shielding shells are arranged in the electromagnetic shielding room body, and thermal power generation components and temperature sensors are mounted in the electromagnetic shielding shells. A multi-layer composite shielding structure is formed by the wave-absorbing cone, the phase regulation corrugated plate and the lattice-like lining layer, a broadband absorption system with complementary functions is formed, waste heat can be converted into electric energy by arranging the thermal power generation assembly, the temperature sensor and the ventilation groove, self-sustaining electric power is provided for the temperature sensor, and the temperature sensor is protected from being damaged. The state of the wave-absorbing material is evaluated in real time by analyzing temperature data, health early warning and preventive maintenance are achieved, the lattice-like lining layer can adjust lattice parameters to customize electromagnetic performance, the porous structure gives consideration to mechanical performance and shielding effect, the weight of the shell can be reduced, and the structural adaptability of the shell can be improved.

The invention relates to the technical field of building wall electromagnetic shielding, and particularly discloses an electromagnetic shielding method for a building wall, which comprises the following steps of: S1, determining an axis, and releasing a middle line and a side line of the wall by taking the axis as a datum line; insulating plates are laid on the floor, a keel frame is built according to the paying-off position, and the keel frame is fixedly installed on the wall and the ceiling through insulating parts; the keel frame is electrically isolated from the building main body through the insulating plate and the insulating part; s2, opening holes used for installing a shielding door and a shielding window are formed in the keel frame, and a shielding plate is installed on the ground insulation plate and the keel frame; conductive linings are arranged at connection gaps among the keel frame, the shielding plate, the shielding door and the shielding window, and the conductive linings enable the shielding structures to form a continuous conductive shielding surface.

The invention relates to an architectural assembly comprising: - at least one concrete panel reinforced with conductive fibers, and lacking a conductive mesh for electromagnetic shielding, - at least one conductive mesh arranged on at least one face of the at least one concrete panel, forming a shield against electromagnetic radiation, characterized in that the concrete panel comprises concrete comprising at least a portion of conductive fibers having a length between 30 and 80 millimeters and a slenderness ratio between 80 and 200. Figure to be published with the abstract: Fig. 5

This electromagnetic wave absorption device (2) is internally provided with: - a first compartment (4) and a second compartment (6) juxtaposed and electrically insulated from one another, - a plurality of solid bodies (14) housed in the first compartment (4), each solid body (14) being formed of an electrically insulating material (16) coated with an electrically conductive material (18), and - at least one layer of electromagnetically compatible fabric (20) housed in the second compartment (6). Figure for the abstract: Fig 1

The present invention relates to a subsea substation system (100) comprising: an oil-filled water impermeable enclosure (102); an AC-transformer (104), and at least one overcurrent device (106a-d) electrically connected to the AC- transformer (104), the at least one overcurrent device, the AC-transformer, and the electrical connections (108, 136, 138) between them are accommodated in the oil-filled water impermeable enclosure, wherein the enclosure comprises thermal zones (110, 112) within the enclosure, wherein the AC-transformer is arranged in a first thermal zone and the overcurrent devices are arranged in a second thermal zone of the enclosure, a thermal layer (111) separate the first thermal zone and the second thermal zone, the at least one thermal layer is configured to allow oil flow between the thermal zones while reducing heat flow between the zones.

The invention discloses an electromagnetic window and a device with the electromagnetic window, and relates to the technical field of electromagnetic shielding, and the electromagnetic window comprises a light-transmitting substrate, a shielding layer, a shielding layer and a feed circuit: the light-transmitting substrate is provided with two opposite mounting surfaces along the thickness direction of the light-transmitting substrate; the shielding layer is arranged on one mounting surface and is provided with a gap region penetrating along the thickness direction; the shielding layer is arranged on the other mounting surface, two metal polarity parts are formed corresponding to the gap area, a magnetic permeable gap is formed between the two metal polarity parts, and a switch shielding part is arranged in the magnetic permeable gap; the feed circuit is electrically connected to the two metal polarity parts; wherein the switch shielding part can be conducted when the feed line is powered on so as to shield the magnetic permeable gap, and can be disconnected when the feed line is powered off so as to expose the magnetic permeable gap. According to the technical scheme provided by the invention, the problem that light-transmitting glass of an existing building is difficult to selectively consider receiving requirements and shielding requirements of indoor users on external electromagnetic signals is solved.

An exemplary semiconductor processing chamber can include a chamber body. The chamber can include a substrate support assembly disposed within the chamber body. The chamber can include a substrate support assembly having a support plate seated atop a support column. The chamber can include a radio frequency (RF) shield seated atop the chamber body and extending around a peripheral edge of the support plate. The RF shield can include a lower annular member. The RF shield can include an upper annular member seated atop the lower annular member. The upper annular member can define a lip projecting radially outward from an outer surface of the upper annular member. Each of the lower annular member and the upper annular member can include a dielectric material.

A self-adaptive shielding device is suitable for a lens or a window of a piece of equipment provided with an electrically conductive enclosure containing an optical or RF sensor. The device includes a shielding screen having a switchable RF shielding mesh of micrometric pitch at least partially surrounded by a border of insulator-metal transition material arranged between the mesh and an electrically conductive envelope. A susceptor element is arranged facing the insulator-metal transition material and transforms incident electromagnetic energy (RFH) into activation heat for the insulator-metal transition material. The susceptor element causes a transition to the conductive state of the insulator-metal transition material under the action of the electromagnetic energy so as to electrically connect the mesh to the electrically conductive envelope when the incident electromagnetic energy exceeds a given threshold.

The present invention discloses a high-density polyethylene shielding cabin and an installation method, which relates to the technical field of shielding cabins, including a high-density polyethylene shielding cabin body and an actively adjustable shielding sandwich assembly, wherein the high-density polyethylene shielding cabin body includes six stacked layer plate assemblies and a plurality of layer plate joint shielding assemblies. The present invention first determines the production accuracy requirements of each high-density polyethylene board through basic theories such as heat transfer and finite element analysis. The use of a stacking method without through-seams can avoid the cross-sectional through-seam from reducing the shielding effect. The layer plate joint shielding assembly is installed at the joint of two adjacent stacked layer plate assemblies, which greatly enhances the shielding effect at the joint and greatly strengthens the strength of the high-density polyethylene shielding cabin body; the use of an actively adjustable shielding sandwich assembly is used to deal with different strong interference sources that may appear in the later stage, and a replaceable liquid shielding layer is used to achieve active directional shielding of strong interference sources, which is easy to disassemble and has an outstanding shielding effect.