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27results about "Active shielding" patented technology
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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
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
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
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
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
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
Magnetic shield
ActiveUS12601801B2Active shieldingDiagnostic recording/measuringMagnetic shieldCondensed matter physics
An active magnetic shield system, including an array of magnetic field sensors arranged to sense a local magnetic field. An array of magnetic field elements are arranged produce a magnetic field. Each magnetic field element has a unit coil for mounting to a plurality of surfaces arranged in at least 3 planes to define an enclosed cancellation volume, and to produce a vector magnetic field pattern.
Owner:MAGNETIC SHIELDS LTD +1
Power conversion device
This power conversion device (100) includes a plurality of power conversion units (1), a first electric field relaxation shield (51), a second electric field relaxation shield (52), and a third electric field relaxation shield (53). The first electric field relaxation shield (51) includes a first end (E1). The second electric field relaxation shield (52) includes a second end (E2). The third electric field relaxation shield (53) includes a third end (E3). The first electric field relaxation shield (51) and the second electric field relaxation shield (52) surround the plurality of power conversion units (1) when viewed from a direction in which the first electric field relaxation shield (51) and the third electric field relaxation shield (53) are overlapped each other. The third end (E3) is disposed at any position within a range from a position overlapping the first end (E1) to a position overlapping the second end (E2) when viewed from the direction in which the first electric field relaxation shield (51) and the third electric field relaxation shield (53) are overlapped each other.
Owner:MITSUBISHI ELECTRIC CORP
MCU and power supply integrated structure
PendingCN121865545AActive shieldingConversion constructional detailsElectronic systemsElectric machinery
The invention relates to the technical field of motors, and discloses an MCU and power supply integrated structure which comprises a power supply device and an inverter device which are arranged in a layered mode, the power supply device and the inverter device are electrically connected through an expandable filtering assembly, and the expandable filtering assembly is used for transmitting electric energy and restraining electromagnetic interference. The charging and inversion device structure is integrated, the upper cavity and the lower cavity are adopted, the two parts are connected through the expandable filtering assembly, and installation is more convenient and simpler. Through the laminated layout of the layers, the reduction of the outline is controlled, and the experiment troubles such as vibration caused by the extension of a mounting fulcrum can also be reduced. The direct electrical connection between the power supply device and the inversion device is realized through the expandable filtering assembly, a complex high-voltage wiring harness is omitted, the installation space of the whole vehicle is obviously reduced, and the super-integration design is realized. The expandable filtering assembly has the functions of electric energy transmission and electromagnetic interference suppression, interference caused by wire harness introduction is effectively reduced, and the stability and power performance of a whole vehicle electronic system are improved.
Owner:SHANGHAI AUTO EDRIVE CO LTD +2
Anti-interference module and terminal device
ActiveUS12538414B2Multiple-port networksCross-talk/noise/interference reductionInterference resistanceSoftware engineering
An anti-interference module and a terminal device are provided. The anti-interference module includes a circuit board, an interfering source, a device disposing space, and an anti-interference component. The interfering source is disposed on the circuit board, where the interfering source may generate a changing interference magnetic field; the device disposing space is provided on a side of the circuit board and is used to dispose an electronic device with a first coil; and the anti-interference component is configured to generate a compensation magnetic field that overlaps the interference magnetic field, or to consume electric energy generated by coupling between the interference magnetic field and the anti-interference component to reduce magnetic induction intensity of the device disposing space. This application may be applied to the terminal device such as a mobile phone.
Owner:HONOR DEVICE CO LTD
Control system for an active shielding screen
Control system for activating / deactivating an electromagnetic shielding screen (11a, 11b, 11c, 11d) of a porthole or of a window for protecting optoelectronic equipment, which comprises, a radiofrequency electromagnetic sensor (1), of passband matched to a blocking band of said shielding screen corresponding to a range of electromagnetic fields to be blocked, which is connected to a detector-rectifier (2) of sensitivity higher than a minimum value of the power of an electromagnetic field to be blocked by means of said shielding screen and a device (13, 14, 15, 16) for activating / deactivating said electromagnetic shielding screen, said detector-rectifier being configured to, in the presence of electromagnetic fields of power exceeding said minimum value, activate said device (13, 14, 15, 16) for activating / deactivating the electromagnetic shielding screen by capturing electromagnetic energy delivered by said electromagnetic fields of power exceeding said minimum value.
Owner:CENT NAT DE LA RECH SCI (C N R S) +2
Self-cancelling wiring harness
A wiring assembly integrated with magnetic field cancellation components is disclosed. The assembly includes a wiring harness comprising a bundle of wires, some of which carry sufficient aggregate current to generate an above-threshold magnetic field within a vehicle cabin. Connectors at wire ends interface with vehicle electrical components. A probe embedded in the harness senses a portion of the aggregate current and transmits a signal to a control unit. The control unit calculates a cancellation current, which is delivered via a dedicated wire integrated into the harness. This cancellation current mitigates at least part of the magnetic field within the cabin, enhancing electromagnetic compatibility and passenger comfort.
Owner:SAFEFIELDS TECH LTD
Oil and gas pipeline electromagnetic interference protection system based on multi-source sensing and intelligent response
PendingCN121645812AScreening casingsActive shieldingInterference (communication)Grounding resistance
The invention discloses an oil and gas pipeline electromagnetic interference protection system based on multi-source sensing and intelligent response, and the system comprises an electromagnetic interference monitoring module which collects the induction voltage, current and grounding resistance data of a key node of a pipeline, and senses the electromagnetic environment of the pipeline in real time; the electromagnetic interference evaluation module is used for evaluating the interference level and the safety margin on the basis of the collected data in combination with a frequency domain characteristic analysis and interference source identification algorithm, and judging whether a standard exceeding risk and an interference cause exist or not; the dynamic response control module is used for automatically selecting and executing corresponding protection measures according to the interference level and the interference source characteristics, including closing a current drainage device loop, dynamically adjusting cathode protection current output, switching symmetrical grounding modes and the like, and optimizing the pipeline protection state; the remote management and communication module interacts with an upper platform, supports operation state uploading, regulation and control instruction issuing and operation log recording, and realizes remote maintenance and intelligent management of the system; and the accuracy of electromagnetic protection and the adaptive capacity of the system in a complex environment are effectively improved.
Owner:PUYANG POWER SUPPLY COMPANY STATE GRID HENAN ELECTRIC POWER
Magnetic field cancellation system
Systems, methods, and computer program products are disclosed for cancelling a magnetic field in a passenger region of a vehicle. Cancelling a magnetic field in a passenger region of a vehicle includes a chassis, a passenger region of the vehicle, a current carrying loop (CCL) configured to carry electricity during vehicle operation, thereby generating a magnetic field configured to radiate toward the passenger region, a sensor associated with the CCL for sensing current passing through the CCL, an electrical wire loop spatially aligned with a physical path of the CCL, and a circuit configured to: receive current sensing data from the sensor, and based on the current sensing data, determine a cancellation electrical current for providing to the electrical wire loop in order to cause a cancelling magnetic field, thereby at least reducing magnetic radiation from the CCL to the passenger region.
Owner:SAFEFIELDS TECH LTD
A novel electromagnetic pulse protection device
ActiveCN115395493BActive shieldingEmergency protective arrangements for limiting excess voltage/currentNuclear radiationElectromagnetic pulse
This invention relates to the field of electromagnetic pulse protection technology, specifically to a novel strong electromagnetic pulse (EMP) protection device. It includes an EMP protection module, a signal processing module, a transmission module, and a client. The EMP protection module comprises a protection module, a pulse sensor, and a voltage sensor. The EMP protection module protects the device. The pulse sensor collects the number of pulses, and the voltage sensor collects the pulse voltage. The signal processing module receives analog signals of the pulse count and pulse voltage, and obtains the status signal of the EMP protection module. The client receives digital signals and the status signal of the EMP protection module, counts the EMPs, collects the highest voltage of the EMPs, calculates the intensity of nuclear radiation by the voltage and the number of pulses, and can predict the lifespan of the EMP protection module, thus achieving the effect of monitoring the condition of the EMP protection device itself.
Owner:NANJING SHANGZHI ELECTRONIC TECH CO LTD
Cable laying device and power transmission and distribution system
The invention relates to a cable laying device and a power transmission and distribution system. A supporting piece is provided with a mounting position; the at least one partition piece is arranged at the mounting position, the partition piece can divide the mounting position into at least two laying positions, and different laying positions are used for placing different types of cables. The different laying positions are used for placing different types of cables, and a partition piece is arranged between every two adjacent laying positions, so that partition pieces are arranged between the different types of cables; the partition member can partition an electromagnetic field generated around the cable, so that other cables cannot be affected by the electromagnetic field generated by different types of cables placed at different laying positions; according to the cable laying device, different types of cables can be integrated and installed on the same cable laying device on the premise of ensuring normal operation of the different types of cables, so that the space occupancy rate of the cables on a construction site is reduced.
Owner:HUADIAN JINSHAJIANG UPSTREAM HYDROPOWER DEV CO LTD +1
Circuit structure, battery, and electronic device
ActiveUS12603333B2Batteries circuit arrangementsCross-talk/noise/interference reductionElectrical batteryHemt circuits
Provided are a circuit structure, a battery, and an electronic device. The circuit structure comprises: a battery, comprising 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 the battery cell is configured to generate a first induced magnetic field when a changing current flows therethrough; and an electromagnetic inductor, configured to generate a second induced magnetic field when the changing current flows therethrough, wherein the second induced magnetic field is superposed on the first induced magnetic field.
Owner:GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
Semiconductor module integrating super junction MOSFET and driving circuit
The invention relates to the technical field of power semiconductors, in particular to a semiconductor module integrating a super junction MOSFET and a driving circuit. The integrated circuit comprises a packaging shell and an integrated structure, the integrated structure comprises an electric processing assembly and a shielding processing assembly, the electric processing assembly comprises a plurality of pin connecting pieces and an integrated circuit board, the integrated circuit board is provided with a driving circuit, and the driving circuit comprises a peripheral input element, a pre-filtering device, a PFC processing element and a peripheral output element which are connected in sequence. The PFC processing element comprises a three-phase rectifier bridge and a drive control device connected with the three-phase rectifier bridge. According to the invention, the super junction MOSFET and the driving circuit are integrated, so that the overall efficiency, reliability and power density of the system are improved, and the development requirements of new-generation high-power power electronic equipment are met.
Owner:WUXI QIANYE MICRO NANO TECH CO LTD