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47results about "Active shielding" patented technology
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Anti-electromagnetic interference method for flywheel energy storage system of data center
PendingCN120979007AElectrical storage systemDigital adaptive filtersInterference resistanceData center
The invention relates to the technical field of anti-electromagnetic interference, in particular to an anti-electromagnetic interference method for a flywheel energy storage system of a data center, which comprises the following steps: acquiring change rate data of the rotating speed and the angular speed of a flywheel, judging the attribution of a disturbance interval, recording change characteristics, extracting an interference identifier, comparing the interference identifier with impedance change, and generating a switching node. Frequency response and reflection coefficient characteristics of the filtering unit are detected, a coupling channel generation label is identified, and output fluctuation is evaluated to generate an anti-interference capability state label. According to the method, the surface resistivity of the shielding layer is dynamically switched according to the comparison result of the specific interference triggering identification bit and the signal link impedance change state in each disturbance stage through classification judgment and correlation marking of inertial disturbance, so that the effect of suppressing electromagnetic interference in real time is optimized; the influence degree of electromagnetic interference can be dynamically evaluated in the system operation process, and the adaptability of the energy storage system to the electromagnetic interference is judged and adjusted in real time.
Owner:SHENYANG MICRO CONTROL ACTIVE MAGNETIC LEVITATION TECH IND RES INST CO LTD
Electromagnetic radiation suppression method for flywheel energy storage system of data center
The invention relates to the technical field of flywheel energy storage electromagnetic suppression, in particular to an electromagnetic radiation suppression method for a data center flywheel energy storage system, which comprises the following steps: acquiring grounding potential data to generate a response node set, comparing a rotating speed with a power event to construct a synchronous topology, identifying a coupling path to generate a path map, and adjusting a magnetic shielding assembly. And monitoring magnetic flux change to generate an electromagnetic compatibility state report. According to the method, the sudden change potential and the recovery rate of a grounding node are analyzed, response nodes with disturbance characteristics are screened, rotating speed and load power events are fused, multi-source data response mapping in a time domain is constructed, a coupling path is recognized based on a node physical connection relation, and the magnetic saturation trend is recognized by collecting magnetic flux density and hysteresis characteristics. The excitation phase is matched to implement dynamic adjustment, the response adaptability of the shielding assembly is improved, the stability is judged according to the magnetic flux density change rate trend, the reset operation of the shielding structure is controlled, the shielding effectiveness retention is enhanced, and electromagnetic suppression in a dynamic interference scene is achieved.
Owner:SHENYANG MICRO CONTROL ACTIVE MAGNETIC LEVITATION TECH IND RES INST CO LTD
Controller assembly and vehicle
The invention discloses a controller assembly and a vehicle, and belongs to the technical field of motor control. The controller assembly has a first direction, a second direction and a third direction which are mutually perpendicular in pairs, the first direction is parallel to the width direction of the vehicle, the second direction is parallel to the height direction of the vehicle, and the third direction is parallel to the length direction of the vehicle; the controller assembly comprises a first integrated module and a second integrated module, and the first integrated module and the second integrated module are arranged in a stacked mode in the second direction. The first integrated module comprises a first box body, a power supply module and a high-voltage power distribution unit; the second integrated module comprises a second box body, a filtering assembly, a supporting capacitor, an integrated plate assembly and an output terminal. According to the controller assembly, the number of parts can be reduced, the manufacturing cost can be reduced, the size in the third direction can be reduced, and therefore the forecabin collision energy absorption space is increased.
Owner:ZHEJIANG LEAPPOWER TECH CO LTD +1
Low-leakage hand-held terminal
The invention belongs to the technical field of electromagnetic radiation leakage, and particularly relates to a low-leakage handheld terminal. According to the method, efficient electromagnetic shielding is achieved in a Faraday cage structure mode through lap joint of all parts, the surface of a resistance screen is covered with an irregular metal net, and the space between the irregular metal net and a front cover is filled with an aluminum silver-plated conductive rubber plate used for cushioning and extrusion to achieve electric continuity between the irregular metal net and the front cover. The front cover, the middle frame and the rear cover are electrically continuous through opposite-penetrating screws, and copper foils are filled among contact surfaces of the middle frame, the rear cover and the front cover to enhance conductivity, so that the whole handheld terminal structure is in an electrically continuous state. The broadband electromagnetic shielding material has the beneficial effects that the electromagnetic shielding performance is remarkably improved, broadband effective protection is realized, the problem that the frequency band of a traditional electromagnetic shielding material is narrow is effectively solved, the shielding effectiveness of 40-50dB is realized in the broadband range of 30MHz to 1GHz, and the information safety level of equipment in an electromagnetic sensitive environment is remarkably improved.
Owner:RES INST OF NUCLEAR POWER OPERATION
Positioning tool and magnetic compensation coil mounting method
Owner:杭州极弱磁场国家重大科技基础设施研究院
A composite reactive resonant shielding coil structure and a robust optimization method thereof
The application is suitable for the field of electric vehicle wireless charging technology, and provides a composite reactive resonance shielding coil structure and a robust optimization method thereof. The composite reactive resonance shielding coil structure is composed of nanocrystals, aluminum plates and reactive resonance shielding coils, can weaken the leakage electromagnetic field of the electric vehicle wireless charging (EV-WPT) system, ensure high energy transmission efficiency and system lightweight, and enhance the offset tolerance and shielding effect. The robust optimization method combines the Attention-Unet uncertainty agent model with the multi-objective whale optimization algorithm (MOWOA), takes the system energy transmission efficiency and the maximum value of the induced electric field intensity in the human body as the optimization target, considers the uncertainty factors, and realizes the fast multi-objective optimization design. The application provides practical application significance and theoretical guidance for the electromagnetic shielding design of the EV-WPT system, and provides a new research idea for the safety and protection of human body electromagnetic exposure.
Owner:CHANGCHUN AUTOMOTIVE TEST CENT +1
Magnetic shielding assembly and magnetic shielding system
The invention discloses a magnetic shielding assembly and a magnetic shielding system, and relates to the technical field of magnetic shielding, the magnetic shielding assembly comprises a magnetic shielding carrier, and the bottom of the magnetic shielding carrier supports a movable wheel; the magnetic shielding cover shell is movably arranged above the magnetic shielding carrier, and a shielding space is formed in the magnetic shielding cover shell; and the shielding coil structure is arranged in the shielding space and can move relative to the magnetic shielding cover shell. According to the magnetic shielding assembly, different magnetic field environments can be shielded, shielding optimization of the different magnetic field environments is achieved, the optimal magnetic field shielding effect is achieved, the working efficiency is greatly improved, operation is convenient, and damage to the human body is reduced.
Owner:聚变新能(安徽)有限公司
Programmable logic controller and modular structure
PendingCN121619846ALocalised screeningActive shieldingModular compositionProgrammable logic controller
The invention relates to the technical field of PLC design, and discloses a programmable logic controller and a modular structure, and the programmable logic controller comprises a CPU host module and at least one extension module. Through the combination of the CPU host module and the detachable expansion module, a complex rack is omitted, and the overall layout is simplified. The module shell is made of aluminum alloy, has good electromagnetic shielding performance, does not need additional shielding parts, and further reduces the structural complexity. The module is directly fixed in the electric control cabinet through screws, and a special support is not needed. The extension module adopts a front, middle and rear shell split design, and the circuit board is integrated in the middle shell, so that the assembly and maintenance are convenient; the inter-module connectors are intensively arranged at the end part, so that the connection disorder is avoided. The front shell is covered with a film, the rear shell is provided with a cushion, and protection and damping are both considered. Through the modes of modular combination, an aluminum alloy shell, integrated installation, simplified connection and fixation and the like, simplified design of the PLC structure is realized while the PLC is adapted to a severe electromagnetic environment.
Owner:WUXI YUYUAN ELECTRICAL TECHNOLOGY CO LTD
A method and apparatus for magnetic interference compensation
The application relates to the technical field of magnetic compensation, and discloses a magnetic interference compensation method and device, which comprises the following steps: acquiring magnetic field information at a current moment; based on the magnetic field information at the current moment and a control signal at a previous moment, an intermediate control signal at the current moment is obtained by using a linear extended state observer and a linear state error feedback control law; based on the intermediate control signal at the current moment, a control signal at the current moment is obtained by using a frequency adaptive proportional-resonant controller; and based on the control signal at the current moment, a current source is controlled to generate a compensation current at the current moment, and the compensation current is used to generate a magnetic field with the same amplitude and opposite direction as the magnetic interference. The linear extended state observer, the linear feedback control law and the frequency adaptive proportional-resonant controller are combined, so that the anti-interference ability and stability of the system when random interference and high-amplitude unknown frequency interference coexist can be effectively improved.
Owner:杭州极弱磁场国家重大科技基础设施研究院
System and method for active cancellation of magnetic fields in a passenger cabin of a vehicle
Systems, methods, and computer readable medium are provided for reducing an undesired magnetic field generated by an electric motor of a vehicle. Reducing an undesired magnetic field generated by an electric motor of a vehicle includes receiving from at least one magnetic field sensor sensing data indicative of the undesired magnetic field emitted into a selected region of a passenger compartment of the vehicle; determining a cancelation magnetic field for at least reducing the undesired magnetic field emitted by the electric motor into the selected region; and directing electrical signals to at least one magnetic field generator positioned in at least one of a passenger seat, a vehicle door, or a frame of the vehicle, for causing the at least one magnetic field generator to generate the cancelation magnetic field for at least reducing the undesired magnetic field emitted by the electric motor through the selected region.
Owner:SAFEFIELDS TECH LTD
Adaptive electromagnetic shielding touch display module
The application discloses a kind of self-adapting electromagnetic shielding touch display module, belong to display module technical field, including touch component and liquid crystal display component, and the top of the side edge of liquid crystal display component is equipped with copper foil between the top of touch component, the top of copper foil is covered with pressing plate, and pressing plate is fixed between the top of touch component and liquid crystal display component, annular through slot is set in the middle position of the top of pressing plate, the top of pressing plate is fixed with fixed ring, and annular through slot is located in the inside of fixed ring.The application is covered with copper foil in the outside of touch component and liquid crystal display component, and local formation outer shielding layer, then setting first metal grid and second metal grid in the middle of outer shielding layer, rotating first metal grid by using rotating mechanism can dynamically adjust shielding layer combination while ensuring the heat dissipation effect of device, change grid included angle, change the attenuation ability of different frequency electromagnetic wave, improve the effect of anti-interference, and the practicality is higher.
Owner:DONGGUAN YOULIAN HENGDA OPTOELECTRONICS CO LTD
Intelligent inspection robot for plant workshop
The invention provides an intelligent inspection robot for a plant workshop, and belongs to the technical field of inspection robots, the intelligent inspection robot comprises a machine body and a shielding assembly arranged on the machine body, a first motor is mounted at the lower end of the machine body, a central control box is mounted on the outer wall of the upper side of the machine body, and a fixed seat is mounted above the central control box. According to the inspection robot, the shielding assembly shields electromagnetic interference generated by surrounding equipment in the inspection process, the electromagnetic interference generated when the equipment in a factory works is effectively blocked, and electronic elements and a circuit system in the inspection robot are protected, so that the accuracy of detection data is guaranteed; meanwhile, the dust collecting assembly adsorbs and collects dust around the robot in the continuous rotation process of the shielding assembly, the dust is prevented from entering the interior of the robot to be attached to the surfaces of components and circuits in the inspection process, cleanliness of an internal sensor is guaranteed, accurate measurement data can be obtained, and the inspection efficiency is improved. Therefore, the measurement precision of the inspection trolley is ensured, and the normal development of equipment state and data acquisition work is ensured.
Owner:JIANGSU DIANCHUANG INFORMATION TECH CO LTD
Anti-interference equipment based on Internet of Things technology
The invention relates to the technical field of anti-interference of the Internet of Things, and discloses anti-interference equipment based on the technology of the Internet of Things, which comprises a device shell, a heat dissipation hole is formed in the top of the device shell, a heat dissipation rod is arranged at the bottom of the heat dissipation hole, a vent groove is formed in the inner side surface of the device shell, and an anti-interference area is arranged in the device shell. The side face of the anti-interference area is provided with a heat dissipation device, the heat dissipation device is arranged on the side face of the ventilation groove, the bottom of the device shell is fixedly connected with an insertion plate, the insertion plate is movably connected with the anti-interference area, and the anti-interference area is internally provided with an anti-interference device; the device is provided with a heat absorption shell, a cooling device, a heat dissipation rod and heat dissipation holes, can provide high heat dissipation capability when the device works, the heat dissipation device can blow out dust in the device to avoid dust accumulation in the device, and meanwhile, the device is provided with an anti-interference device to perform anti-interference processing on transmitted signals, so that the anti-interference capability of the device is improved, and the service life of the device is prolonged. And the internal and external anti-interference capability of the device is improved.
Owner:XIAN EURASIA UNIVERSITY
Electromagnetic wave shielding material, electronic component, and electronic apparatus
There are provided an electromagnetic wave shielding material including a multilayer structure having, between two metal layers, a high magnetic permeability layer that is an insulating layer in which a real part of a complex specific magnetic permeability at a frequency of 100 kHz is 30 or more, and an electronic component and an electronic apparatus which include the electromagnetic wave shielding material.
Owner:FUJIFILM CORP
Devices for reducing electromagnetic interference
The electromagnetic interference mitigation device includes a power supply, a power cord, a power supply housing that encloses at least the power supply and is physically isolated from the power cord, a low-value resistor that is in electrical communication with at least the power cord and the power supply, and a capacitor disposed between the power supply housing and a device housing, wherein the device housing encloses the power supply housing and is disposed at a distance from the power supply housing, and the capacitor is formed by the device housing and the power supply housing.
Owner:HYDROCISION INC
Electronic device
The present invention discloses an electronic device. The electronic device includes a connector and a sensing control unit. The connector includes a metal mask and at least one terminal. The sensing control unit is electrically connected to the metal mask and the at least one terminal. The sensing control unit is suitable for sensing whether the connector is connected to an external device, and includes a proximity sensing circuit connected to the metal mask. When the connector is connected to the external device, the sensing control unit enables the metal mask to be grounded. When the connector is not connected to the external device, the sensing control unit enables the metal mask to be floated, and the floated metal mask is suitable as a sensing electrode of the proximity sensing circuit.
Owner:PEGATRON
Composite reactive resonance shielding coil structure and robust optimization method thereof
The invention is suitable for the technical field of wireless charging of electric vehicles, and provides a composite reactive resonance shielding coil structure and a robust optimization method thereof. The composite reactive resonance shielding coil structure is formed by combining the nanocrystalline, the aluminum plate and the reactive resonance shielding coil, the leakage electromagnetic field of an electric vehicle wireless charging (EV-WPT) system can be weakened, the high-energy transmission efficiency and the light weight of the system are guaranteed, and the offset tolerance and the shielding effect are enhanced. According to the robust optimization method, an Attention-Unet uncertainty agent model and a multi-target whale optimization algorithm (MOWOA) are combined, the maximum value of the energy transmission efficiency of the system and the maximum value of the intensity of the induced electric field in the human body serve as optimization targets, uncertainty factors are considered, and rapid multi-target optimization design is achieved. The method provides practical application significance and theoretical guidance for electromagnetic shielding design of the EV-WPT system, and also provides a brand new research thought for human body electromagnetic exposure safety and protection.
Owner:CHANGCHUN AUTOMOTIVE TEST CENT +1
A method for electromagnetic radiation suppression for data center flywheel energy storage systems
The present application relates to flywheel energy storage electromagnetic suppression technology field, concretely for a kind of electromagnetic radiation suppression method for data center flywheel energy storage system, including the following steps, obtaining ground potential data generates response node set, comparing rotational speed and power event constructs synchronous topology, identifies coupling path and generates path atlas, adjusts magnetic shielding component, monitors magnetic flux change and generates electromagnetic compatibility state report.In the present application, by analyzing the mutation potential and recovery rate of ground node, screening the response node with disturbance characteristics, fusing the rotational speed and load power event, constructing the multi-source data response mapping in time domain, identifying the coupling path based on the physical connection relationship of node, collecting the magnetic flux density and magnetic hysteresis characteristics to identify the magnetic saturation trend, matching the excitation phase to implement dynamic adjustment, improving the response adaptability of shielding component, judging the stability by the change rate trend of magnetic flux density, controlling the reset operation of shielding structure, strengthening the shielding efficiency retention, realizing electromagnetic suppression under dynamic interference scene.
Owner:SHENYANG MICRO CONTROL ACTIVE MAGNETIC LEVITATION TECH IND RES INST CO LTD
A zero magnetic field leakage detection system based on a magnetic shielding structure
The application discloses a zero magnetic field leakage detection system based on a magnetic shielding structure. When the zero magnetic field leakage detection system scans a defect of a tested piece, the mobile carrier is placed on the tested piece first, and then the mobile carrier is controlled to move uniformly on the tested piece. In the moving process, the magnetizer magnetizes the tested piece to saturation. At this time, the magnetic flux of the permanent magnet is divided into two routes. One route spreads to the inside of the tested piece, and the other route spreads in the air. In the spreading process of the magnetic flux in the tested piece, when the defect position is encountered, the magnetic conductivity of the defect position is distorted, the magnetic flux produces magnetic refraction leakage to the air, and simultaneously, the magnetic diffusion and the magnetic compression effect brought by the background magnetic field are accompanied, and finally, the leakage magnetic field is formed above the defect. The magnetic sensor captures the leakage magnetic signal and sends the leakage magnetic signal to the PC end, so that the shape and size of the defect are judged.
Owner:SICHUAN DEYUAN PETROLEUM & GAS CO LTD
magnetic shield
A cryostat comprising an interior volume, cooling means for reducing the temperature of the interior volume to cryogenic temperatures, and at least one coil winding located within the interior volume for generating a magnetic field in the interior volume to counteract the effects of an ambient magnetic field, wherein the coil winding is made from wire having superconducting properties at cryogenic temperatures. In this way, the coil winding can be provided within the cryogenically cooled region without generating heat which can interfere or overload the cooling means. The coil winding can be used to provide active magnetic shielding or to establish a required background magnetic field.
Owner:MAGNETIC SHIELDS LTD +1
Carbon fiber mask aluminum profile heat preservation cabin door electromagnetic shielding structure and manufacturing process
The invention provides a carbon fiber mask aluminum profile heat preservation cabin door electromagnetic shielding structure and a manufacturing process thereof. The carbon fiber mask aluminum profile heat preservation cabin door electromagnetic shielding structure comprises a carbon fiber mask provided with a metal aluminum spraying layer, an aluminum profile framework and heat preservation foam filled in a cavity. And a semi-fluid sealant layer for forming a physical isolation dam and a conductive sealant layer for electric connection are sequentially arranged on the contact surface of the mask and the framework from inside to outside. According to the invention, internal insulation structural adhesive is prevented from overflowing to pollute a conductive surface by utilizing the physical barrier effect of the inner side semi-fluid sealant layer, and reliable electromagnetic shielding and sealing are realized by combining the connection effect of the outer side conductive sealant layer; the problems of shielding failure and water seepage of the composite cabin door caused by the fact that dissimilar materials cannot be welded and glue overflow are effectively solved, and the shielding effectiveness and reliability of the cabin door are improved.
Owner:HENGYANG TELLHOW COMM MOTOR CO LTD
Magnetic shielding device based on permalloy-ferrite-superconducting coil with low magnetic noise and high shielding performance
The magnetic shielding device based on the low magnetic noise and high shielding performance of the permalloy-ferrite-superconducting coil can provide a stable extremely low magnetic noise weak magnetic environment for an ultra-high sensitive SERF magnetic field and inertial measurement device, mainly composed of a permalloy magnetic shield, a ferrite magnetic shield, a superconducting coil magnetic shield support, a non-metallic dewar, a superconducting coil winding disc and an adjustable stud, etc., the ferrite magnetic shield is placed in the permalloy magnetic shield cavity, the superconducting coil magnetic shield support is placed in the ferrite cavity, the non-metallic dewar is placed on the superconducting coil magnetic shield support, and the superconducting coil winding disc is placed in the non-metallic dewar cavity, by combining the active magnetic shielding of the superconducting coil with the traditional passive magnetic shielding of the permalloy-ferrite, the problem that the magnetic noise of the traditional magnetic shielding material is difficult to further reduce is overcome, and the magnetic noise of the device is further reduced, and the sensitivity of the SERF magnetic field and inertial measurement device limited by the magnetic noise of the magnetic shielding itself can be greatly improved.
Owner:BEIHANG UNIV
A combined shielding method for high-precision electron microscope chamber
ActiveCN120358727BScreening rooms/chambersActive shieldingElectron microscopeElectromagnetic shielding
The invention relates to the field of electromagnetic shielding in an electron microscope room and provides a high-precision combined shielding method for an electron microscope room. The method comprises the following steps: S1, simulating an electron microscope operating experimental environment to perform initial magnetic field measurement, and testing the values of the direct current and alternating current magnetic field environments respectively; S2, using 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 a target value of the magnetic field environment of the electron microscope equipment; S3, after the shielding shell is welded and the shielding door and the waveguide window are installed, a shielding test is performed, and weak points and magnetic leakage points are reinforced, wherein 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 grid; S4, setting an active shielding system, correcting the deviation of the electron microscope experimental magnetic field environment in the actual operating stage, being able to simultaneously meet the requirements of magnetic field and electromagnetic shielding, optimizing the waveguide window structure, and simultaneously meeting the requirements of shielding for low-frequency and high-frequency electromagnetic waves.
Owner:BEIJING URBAN CONSTR GROUP
A full-automatic magnetic compensation method for a magnetic shielding cabin based on a Monte Carlo algorithm
The application relates to a full-automatic magnetic compensation method of a magnetic shielding cabin based on a Monte Carlo algorithm. The method can simultaneously perform three-axis magnetic compensation in a full-automatic mode without decoupling the coupling of three-axis coils. First, three reference voltages are set as voltages for individually compensating three-axis residual magnetism to zero, then three random voltages in a certain interval are generated and input into the compensation coils with the three reference voltages as centers, and then a magnetic measuring sensor is used to measure the size of the residual magnetism. If the residual magnetism after compensation in three-axis directions is all zero, the algorithm stops, and stable voltages are output from the three axes. If the residual magnetism after compensation in three-axis directions is not all zero, three random voltages in a given interval are generated again and input into the compensation coils, and the above steps are repeated until the three-axis random voltages make the residual magnetism after compensation in three-axis directions all zero. If the above steps are repeated N times, and the measured residual magnetism is not reduced to 0, the voltage range generated by the random points is increased, the above steps are repeated, and the residual magnetism after compensation in three-axis directions is all zero.
Owner:BEIHANG UNIV +1
Intraoperative nerve monitor anti-interference device and method based on adaptive filtering
The invention relates to the technical field of medical instruments, in particular to an intraoperative nerve monitor anti-interference device and method based on self-adaptive filtering, the device comprises an anti-interference shell and a closed cover plate, the closed cover plate is fixedly connected with the top of the anti-interference shell through bolt sets arranged on the periphery, a monitor is placed in the anti-interference shell, and the anti-interference shell is fixedly connected with the closed cover plate through bolts arranged on the periphery of the closed cover plate. A positioning assembly used for stably limiting the monitor is further arranged on the periphery of the interior of the anti-interference shell. The anti-interference shell is of a three-layer structure comprising the protective frame, the heat dissipation cold frame and the electromagnetic shielding frame, and the electromagnetic shielding frame is provided with a carbon fiber reinforcing layer, a nickel-copper alloy conducting layer and a PEEK protective layer, so that liquid and instrument collision in an operation environment can be resisted, and external electromagnetic interference can be isolated; the positioning frame is adjusted to be tightly attached to the monitor through the inflation cavity, elastic allowance is reserved in cooperation with the adjusting spring and the damper, longitudinal buffering of the damping bottom pad and the limiting top plate is combined, and the influence of vibration in transportation and operation on the monitor can be reduced.
Owner:贵州中医药大学第二附属医院
Circuit board and electronic device
ActiveCN117693115BActive shieldingPrinted circuit board receptaclesStructural engineeringDaughterboard
The application discloses a circuit board and an electronic device, the circuit board comprising a main plate layer, a first frame plate layer, a first sub plate layer, a first device and a second device, the first frame plate layer being stacked on the main plate layer, the first sub plate layer being stacked on a side of the first frame plate layer away from the main plate layer, the first device being arranged on the main plate layer, and the second device being arranged on the first sub plate layer. The application can exchange a larger layout area for a Z-direction space in a stacked manner by stacking the first sub plate layer on the main plate layer, that is, the layout area of the circuit board is increased. At this time, the first device can be arranged on the main plate layer, and the second device can be arranged on the first sub plate layer, so that the layout and wiring requirements of the devices and the circuit are met.
Owner:HONOR DEVICE CO LTD
Electromagnetic wave absorbing sheet
An electromagnetic wave absorbing sheet includes a sheet-shaped fibrous substrate and a plurality of carbon nanotubes attached to the sheet-shaped fibrous substrate. The attached amount of the carbon nanotubes in the electromagnetic wave absorbing sheet is 5 mass % or more. The electromagnetic wave absorbing sheet has a surface resistance of 20 Ω / sq. or more.
Owner:ZEON CORP
A high-transmittance dual-mode optical window with electrically adjustable microwave transmission amplitude
A high-transmittance dual-mode optical window with electrically adjustable microwave transmission amplitude belongs to the fields of optically transparent electromagnetic shielding and microwave communication. This window consists of an electrically adjustable metasurface layer of integrated patterned phase change material and a transparent dielectric layer, arranged in parallel and overlapping layers. The electrically adjustable metasurface layer is composed of a periodically densely arranged array of electrically adjustable metasurface units of integrated patterned phase change material, and the edges of the electrically adjustable metasurface layer have metal electrodes and leads connected to the metal electrodes. This invention solves the problem that existing optical windows cannot simultaneously achieve high optical transparency over a wide wavelength range, adjustable microwave transmission amplitude, and fast response time.
Owner:HARBIN INST OF TECH
High-protection switch cabinet with multilayer shielding electromagnetic protection
InactiveCN121790972ALocalised screeningScreening gaskets/sealsElectromagnetic shieldingElectronic component
The invention discloses a high-protection switch cabinet with multi-layer shielding electromagnetic protection, and is applied to the technical field of switch cabinets. Comprising a switch cabinet body, sealing shells are welded to the two sides of the switch cabinet body, ventilation windows are communicated with the ends, away from the switch cabinet body, of the tops of the two sealing shells through bolts, and fixing bases are connected to the top of the switch cabinet body and the tops of the sealing shells through bolts. Heat conduction is carried out inside the switch cabinet main body through the heat dissipation fins, and heat inside the switch cabinet main body is transferred into the sealed shell. And then ventilation and heat dissipation are conducted on the interiors of the sealing shells through the heat dissipation mechanisms, so that external cold air can flow in the two sealing shells in sequence, and heat in the heat dissipation fins is taken away. Therefore, the interior of the switch cabinet can be completely sealed, the electromagnetic shielding protection capability is ensured, the flowing path of the air flow is changed, the air flow can uniformly flow to the heat dissipation fins at different positions to take away internal heat, and the heat dissipation effect on electronic components is fully improved.
Owner:JIANGSU HONGQIANG ELECTRICAL GRP CO LTD
Systems and methods for reducing exposure to magnetic field radiation in passenger vehicles
PCT designated stageWO2025253293A2Electric devicesActive shieldingCurrent sensorElectric current flow
Systems, methods, and computer readable media are disclose for protecting vehicle passengers from magnetic field radiation. Protecting vehicle passengers from magnetic field radiation may include a passenger cabin; a wire cable configured to carry electricity during vehicle operation thereby generating a primary magnetic field that, in an absence of cancellation, would radiate into the passenger cabin; a current sensor associated with the wire cable, for sensing current through the wire cable; a cancellation wire, running along the wire cable; and an amplifier configured to receive a signal indicative of current running through the wire cable and for generating, within 1500 microseconds, a cancellation current for application to the cancellation wire, the cancellation current is within 30% of the current passing through the wire cable in order to cause a cancelling magnetic field thereby at least partially eliminating magnetic radiation from the wire cable to the passenger cabin.
Owner:SAFEFIELDS TECH LTD +3