13 results about "Magnetic field shielding" patented technology

This utility model discloses a modular stacked electrical component, belonging to the field of electrical component technology. It includes a housing, a perforated fixing strip welded to the inner surface of the housing, a side support strip on the upper surface of the perforated fixing strip, an internal hexagon screw on the inner surface of the side support strip, a movably latching plate on the outer surface of the internal hexagon screw, a magnetic field shielding mesh fixedly connected to the outer surface of the latching plate, a deformable rubber fixedly connected to the outer surface of the magnetic field shielding mesh, and a fixing block fixedly connected to the outer surface of the deformable rubber away from the latching plate. One side of the electrical component is supported by the perforated fixing strip and connected to the side support strip via the internal hexagon screw, completing the bottom support. The protruding end of the internal hexagon screw is fixed by the latching plate. The deformable rubber, through deformation and bending, correspondingly drives the magnetic field shielding mesh support. The magnetic field shielding mesh wraps around the electrical equipment, completing electromagnetic shielding. The fixing block is fixed by being latched in an inclined groove and by deforming outwards to latch onto the inner surface of the inclined groove.

A magnetic resonance-compatible programmable synchronized photostimulation system includes a main control unit and a stimulation execution unit. The main control unit is located outside the magnetic resonance scanning room, while the stimulation execution unit is located inside the scanning room and consists only of an LED light panel shielded by a magnetic field. The main control unit is configured to: receive photostimulation sequence parameters configured by the user in a modular manner through a graphical interface; receive a scan trigger signal from the magnetic resonance equipment, and automatically control the start and stop of the photostimulation sequence based on the trigger signal using hardware triggering; thereby achieving high-precision time synchronization between photostimulation and magnetic resonance scanning while maintaining magnetic resonance compatibility. This invention solves electromagnetic compatibility issues through a split architecture, achieves millisecond-level synchronization accuracy through hardware TTL triggering, and enhances experimental paradigm flexibility through modular programmable sequences, making it suitable for neuroscience research fields such as functional magnetic resonance imaging.

The application discloses a kind of magnetic field shielding method and device of mechanical pump electron beam welding, based on the simulation analysis of the magnetic field distribution at the weld of mechanical pump, according to the shape of mechanical pump, iterative design magnetic field shielding device, adopt high permeability permalloy to make " two half splicing " type double shielding structure, the splicing seam of inside and outside two shielding layers is 90 ° angle, installed in the periphery of mechanical pump, in the premise of not changing the performance of mechanical pump itself, not transforming electron beam welding equipment realizes beam current no deflection in the process of mechanical pump electron beam welding, realizes the precision welding of mechanical pump.

The application discloses a kind of rock core orienter for paleomagnetic research, belong to paleomagnetic rock core measurement technical field, including the hollow column of collaborative work, magnetic field shielding component, automatic leveling and inclination measurement component, inclination measurement component, sun compass and sun angle measurement component, data acquisition and storage component, automatic ink jet marking component and matching software system;Each component is sequentially layered assembly, forms the automation closed loop of "insertion-leveling-measurement-verification-recording-marking-transmission".The rock core orienter for paleomagnetic research described above is used in the application, can greatly reduce manual operation steps, avoid human error and magnetic interference, improve measurement accuracy and data consistency, realize that core orientation work efficiency is significantly improved, measurement result is more reliable, sample corresponding is clear and post information management is convenient traceability.

A compact spin-exchange relaxation free biaxial inertial measurement structure, by locating the air chamber in the oven, the oven is positioned in the coil support cylinder, the coil support cylinder is positioned in the magnetic field shielding cylinder, can avoid the suspended installation, positioning is more reliable, is favorable for reducing the influence of external vibration and other interference, thereby improves the stability, reliability of the device, its characterized in that, including the magnetic field assembly installed on the main structure, the magnetic field shielding cylinder of magnetic field assembly is provided with coil support cylinder, the bottom of the cylinder nest groove of coil support cylinder is nested one end of oven, the other end of oven is nested by the bottom nest groove of oven support cylinder, the outer edge of the cylinder mouth of oven support cylinder is nested by the inner edge of the cylinder mouth of coil support cylinder, the oven is provided with clamping device used as air chamber installation reference.

This application discloses a display module, comprising: a display device including multiple sub-pixels and a semi-transparent, semi-reflective layer; a dimming component disposed on one side of the light-emitting surface of the display device, including a magneto-optical modulation layer and a polarizer disposed on the side of the magneto-optical modulation layer away from the display device; the magneto-optical modulation layer includes a stacked magnetic field shielding layer, a magnetizing element, and a magneto-optical medium layer, the magnetic field shielding layer being located on the side of the magnetizing element closer to the display device; the polarizer is used to modulate incident ambient light into first linearly polarized light; the magneto-optical medium layer is used to modulate the first linearly polarized light into second linearly polarized light under the drive of the magnetizing element; the semi-transparent, semi-reflective layer is used to reflect the second linearly polarized light to the magneto-optical medium layer; the magneto-optical medium layer is used to modulate the second linearly polarized light into third linearly polarized light, the third polarization angle of the third linearly polarized light being perpendicular to the first polarization angle of the first linearly polarized light. Through the above configuration, interference from ambient light is isolated, contrast is improved, and the light transmittance of the sub-pixels is guaranteed.

The present application relates to battery processing and manufacturing technology field, provide a kind of transverse magnetic flux radio frequency induction heating battery pole piece blank area wrinkle removal method, megahertz level radio frequency signal is output by radio frequency power supply, after impedance matching, lossless feed into transverse magnetic flux inductor, generate transverse magnetic force line to make eddy current closed in battery pole piece plane. Again with active water-cooling magnetic flux shield plate generates reverse magnetic field shielding magnetic flux, and through built-in water-cooling channel and timely heat dissipation. While by supporting support roller keeps inductor and pole piece gap constant, cooperate temperature sensor closed loop temperature control and heat to softening state, by production line winding mechanism drive plastic extension of softening zone, finally through frozen roll quenching, overall complete battery pole piece complete heat treatment process. The present application also provides a kind of device, the method and device realize ultra-thin battery pole piece effective induction heating and online annealing. Both can efficiently eliminate pole piece processing residual stress, smooth wrinkle defect, and whole process without damaging coating structure, no powder crack problem.

The application relates to a laminated assembly, a joint structure for the laminated assembly and a vehicle. The laminated assembly comprises a first transparent substrate, a second transparent substrate, a first functional layer, a second functional layer, a charge leading-out element and / or an electromagnetic field shielding element. The first functional layer is arranged between the first transparent substrate and the second transparent substrate and is used for electrical connection with an external power supply. The second functional layer is arranged on the side of the second transparent substrate away from the first functional layer. The charge leading-out element and / or the electromagnetic field shielding element are arranged on the side of the second functional layer away from the second transparent substrate. One end of the charge leading-out element is electrically connected with the first functional layer, and the other end is used for grounding. The electromagnetic field shielding element is arranged between the first functional layer and the second functional layer or on the side of the second functional layer away from the second transparent substrate. The laminated assembly provided by the application can lead away the charge on the second functional layer, thereby improving the use safety of the laminated assembly.

This invention discloses a functional bottle-mouth sealing gasket intermediate and its manufacturing method, belonging to the field of packaging material technology. It consists of a through-hole foamed support layer and a functionally modified heat-sealing layer. The through-hole foamed support layer has fixing holes. The functionally modified heat-sealing layer is composed of a base resin and functional masterbatch. The functional masterbatch includes a moisture-proof masterbatch layer, an antibacterial masterbatch layer, and an odor-deodorizing masterbatch layer, arranged sequentially from top to bottom. The through-hole foamed support layer is a cross-linked polyolefin foam material with a thickness of 0.3-1.0 mm. The fixing holes have a diameter of 0.15-0.4 mm and are evenly distributed. This functional bottle-mouth sealing gasket intermediate, with its regularly spaced fixing holes in the through-hole foamed support layer, breaks the magnetic field shielding, reduces electromagnetic induction sealing power, shortens heating time, and improves heating uniformity, thereby increasing the sealing pass rate.

The application discloses a current transformer with an external shielding protection structure and relates to the technical field of current transformers. The current transformer shielding structure is improved in view of the problems of insufficient single-direction magnetic field protection and contradiction between shielding and heat dissipation. The current transformer body is provided with a shielding assembly composed of a magnetic sensing side plate and a fixed side plate on the outside. The operation of the current transformer is divided into two stages, namely, self-operation and active intervention. In the self-operation stage, the shielding component is used to realize magnetic field isolation, and low-temperature water and spiral airflow are used to complete multi-stage heat dissipation. In the active intervention stage, the real-time magnetic field strength is used to drive the permanent magnetic beads to move directionally to strengthen the magnetic field protection, and the power of the air pump is adjusted to improve the heat dissipation efficiency, so that the integrated mode of multi-dimensional magnetic field shielding and high-efficiency heat dissipation is formed, and the measurement accuracy and operation life of the current transformer under strong electromagnetic radiation and high-load working conditions are greatly improved.

The application discloses a flexible sensing device used in a strong electric field and a strong magnetic field and a manufacturing method thereof, and the method comprises the following steps: selecting micro low-power components, including a PCB antenna, a wireless communication module, a master control chip, a battery, a flexible circuit board (FPCB), and configuring sensor components; performing PCB layout and welding on the components to obtain a first-stage FPCB; performing anti-interference structure design with a metasurface structure on the first-stage FPCB to obtain a second-stage FPCB; performing packaging processing on the second-stage FPCB to obtain the flexible sensing device used in the strong electric field and the strong magnetic field; and performing metasurface structure electromagnetic field shielding performance test and overall anti-interference performance test on the flexible sensing device through a test platform. The flexible sensing device has good flexibility and meets the scene application of the complex strong electric field and strong magnetic field environment in the power industry.

The application provides a strong magnetic field multilayer composite shielding cylinder suitable for underwater environment and a manufacturing method thereof, which comprises a multilayer composite cylinder, and the multilayer composite cylinder comprises, from inside to outside, a cylinder base material layer, a high magnetic permeability layer, a high saturation magnetic flux density layer, a high conductivity layer and a protective layer; the cylinder base material layer is provided with a base material layer mounting groove, the high magnetic permeability layer, the high saturation magnetic flux density layer and the high conductivity layer are arranged in the base material layer mounting groove, and any two adjacent layers are connected through epoxy adhesive bonding. The application fully utilizes the advantages of the shielding materials in the magnetic field shielding, is helpful for protecting the sensitive circuit and device inside the countermeasure equipment from the interference of external magnetic field, sets the protective layer on the outermost layer, is helpful for water pressure resistance and corrosion resistance, and thus meets the corrosion resistance requirement of the underwater countermeasure equipment. The manufacturing method is simple, has low requirement on the manufacturing equipment, is helpful for reducing the cost, replacing the layer material and prolonging the service life.

The utility model discloses a kind of lightweight inertial navigation system magnetic shielding structure, comprising: cavity and base, the cavity is located at the top of base, and gradient transition zone is equipped between the two, the gradient transition zone adopts double curvature surface to connect cavity and base, and form the gradient distribution of the wall thickness increasing from top to bottom. The lightweight inertial navigation system magnetic shielding structure of the utility model, the mechanism is optimized, through the design of base and double curvature surface gradient transition zone, the magnetic domain disorder caused by traditional shell edge sharp turning is eliminated, ensure that magnetic force line is evenly distributed, significantly improve the uniformity and stability of magnetic field shielding, simultaneously also solve the systematic defects of traditional scheme secondary assembly redundancy and stress concentration.