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73results 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
Coded electromagnetic shielding superstructure optimization design system and method and superstructure unit array
The invention discloses an electromagnetic shielding technical scheme of a coding superstructure and an optimization design system. The electromagnetic shielding technical scheme comprises a reflectivity setting module which sets a reflectivity threshold according to target shielding performance; the superstructure construction module generates an initial candidate array based on the symmetric unit design; and the parameter optimization module dynamically adjusts the sub-block thickness and the unit ratio k value through a particle swarm algorithm, and realizes 1-18GHz broadband reflectivity optimization in combination with a piecewise evaluation function. According to the invention, through deep fusion of coding superstructure design and an intelligent optimization system, collaborative optimization of electromagnetic loss and phase regulation is successfully realized, and significant technical advantages are formed in key indexes such as broadband absorption, angle adaptability, system efficiency and the like.
Owner:DONGFENG MOTOR GRP
Frequency selective metamaterial for protective enclosures
The present disclosure provides a protective enclosure for electronic systems. The enclosure comprises a polymer-containing matrix and a metamaterial incorporated into the matrix. The metamaterial is tuned to a specific permittivity or permeability to absorb or reflect a particular frequency. The protective enclosure may be used to create a safe inner environment for electronic components while facilitating uninterrupted wireless communications to / from the outer environment. Additionally, the protective enclosure may be used to protect against electromagnetic interference. In particular, shielding metamaterials are configured individually or in combination to specifically shield (via reflection, absorption, etc.) against relatively wide bands of electromagnetic frequencies, while transparent metamaterials are configured specifically to pass electromagnetic signals within narrow bands of frequencies. This new approach resolves and vastly improves current shield solutions, such as Faraday cages. For example, tuned metamaterials may be configured across a variety of preconfigured frequencies, and can be constructed of lightweight materials.
Owner:LYTEN INC
EMC filtering electromagnetic shielding structure and vehicle-mounted charger
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.
Owner:SHENZHEN VMAX NEW ENERGY 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
Self-adaptive electromagnetic shielding touch display module
The invention discloses a self-adaptive electromagnetic shielding touch display module, and belongs to the technical field of display modules, the self-adaptive electromagnetic shielding touch display module comprises a touch assembly and a liquid crystal display assembly, a copper foil is arranged between the top of the side edge of the liquid crystal display assembly and the top of the touch assembly, and the top of the copper foil is covered with a pressing plate; the pressing plate is fixed between the top of the touch control assembly and the top of the liquid crystal display assembly, an annular through groove is formed in the middle of the top of the pressing plate, a fixing ring is fixed to the top end of the pressing plate, and the annular through groove is located in the fixing ring. The outer side edges of the touch control assembly and the liquid crystal display assembly are covered with the copper foil, the outer shielding layer is locally formed, then the first metal grid and the second metal grid are arranged in the middle of the outer shielding layer, and then the rotating mechanism is used for controlling rotation of the first metal grid, so that the heat dissipation effect of the device can be ensured, and meanwhile the heat dissipation efficiency is improved. And the combination of the shielding layers is dynamically adjusted, so that the grid included angles are changed, the attenuation capability to electromagnetic waves with different frequencies is changed, the anti-interference effect is improved, and the practicability is higher.
Owner:DONGGUAN YOULIAN HENGDA OPTOELECTRONICS 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
Electromagnetic shielding device for GM refrigerator and superconducting magnet maglev train
The embodiment of the invention provides an electromagnetic shielding device for a GM refrigerating machine and a superconducting magnet maglev train, the electromagnetic shielding device is used in cooperation with the GM refrigerating machine, the electromagnetic shielding device comprises an inner shielding assembly and an outer shielding assembly arranged on the outer wall of the inner shielding assembly in a sleeving mode, and the inner shielding assembly is connected with the outer shielding assembly; the inner shielding assembly is made of a permalloy material, and the outer shielding assembly is made of an aluminum alloy material of which the surface is aluminized; during use, the GM refrigerating machine is arranged in the inner shielding assembly, and a magnetic field outside the GM refrigerating machine is shielded through the inner shielding assembly and the outer shielding assembly; the device is reasonable in structural design, and can effectively block static magnetic field and high-frequency alternating magnetic field harmonic waves in a back field. The invention is suitable for the technical field of refrigerator shielding devices.
Owner:HIWING TECH ACAD OF CASIC
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
Combined shielding method for high-precision electron microscope chamber
ActiveCN120358727AScreening rooms/chambersActive shieldingAC - Alternating currentElectron microscope
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.
Owner:BEIJING URBAN CONSTR GROUP
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
Film type planar heating element for preventing electromagnetic waves
A film type planar heating element for preventing electromagnetic waves is configured in a form of multiple layers of films to generate heat, the film type planar heating element comprising: a base film made of synthetic resin and mounted on a floor in a form of sheet film; a carbon heating unit made of carbon materials and arranged in multiple rows to generate heat planarly on a top side of the base film; a pair of center-adjacent copper foil busbars disposed in a center area of the base film, applying current to the carbon heating unit, and facing each other in a close distance so that intensities of electromagnetic waves and magnetic field are mutually canceled each other when the current is applied; a pair of center silver busbars formed between the carbon heating unit and the center-adjacent copper foil busbars and made of silver materials allowing the current, which is applied to the center-adjacent copper foil busbars, to smoothly flow to the carbon heating unit, and a Lamirex film coated on the top side of the base film to protect the carbon heating unit and the center-adjacent copper foil busbars.
Owner:IR TECHNIKA CO LTD
Circuit systems
PendingUS20250267829A1Cross-talk/noise/interference reductionActive shieldingElectromagnetic interferenceMechanical engineering
Various circuit board systems and methods of use and manufacture thereof are disclosed. A circuit board system can have a first circuit board including a substrate and a first component susceptible to electromagnetic interference carried by the substrate. The system can also include a second circuit board including a second substrate, and a shield engaged to the substrate of the first component, the shield at least partially covering the first component and being configured to protect the first component from electromagnetic interference, wherein the shield couples the substrate of the first circuit board to the substrate of the second circuit board.
Owner:SNAP INC
System and method for active cancellation of magnetic fields in a passenger cabin of a vehicle
A vehicle, comprising: a frame; a passenger compartment including a selected region suitable for presence of people; an electric motor that, when in operation is associated with an undesired magnetic field emitted into the selected region; a magnetic field generator positioned in at least one of a passenger seat, a vehicle door, or the frame, wherein the magnetic field generator is configured to at least reduce the undesired magnetic field in the selected region; a magnetic field sensor configured for sensing the undesired magnetic field emitted into the selected region; and a circuit configured to: receive from the magnetic field sensor sensing data indicative of the undesired magnetic field; determine a cancelation magnetic field for at least reducing the undesired magnetic field; and direct electrical signals to the magnetic field generator for generating the cancelation magnetic field for at least reducing the undesired magnetic field.
Owner:SAFEFIELDS TECH LTD
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
Circuit structure, battery, electronic device and method for manufacturing battery
ActiveCN114173542BActive shieldingSecondary cells servicing/maintenanceElectrical batteryHemt circuits
The embodiment of the present application provides a circuit structure, a battery, an electronic device and a method for manufacturing a battery, wherein the circuit structure comprises: a battery, wherein the battery comprises a first positive electrode, a first negative electrode and a battery cell, wherein the battery cell is connected between the first positive electrode and the first negative electrode, and wherein the battery cell can generate a first induced magnetic field when a variable current exists; and an electromagnetic induction body, wherein the electromagnetic induction body is configured to generate a second induced magnetic field when a variable current exists, and wherein the second induced magnetic field can be superimposed on the first induced magnetic field. The second induced magnetic field can be superimposed on the first induced magnetic field, and the superimposed induced magnetic field meets the requirements of peripheral devices and the requirements of different scenarios.
Owner:GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP 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