207results about "Localised screening" patented technology

The embodiment of the invention relates to the technical field of electronic equipment, and provides an anti-interference structure, a shell assembly and electronic equipment, the anti-interference structure comprises an antenna, a camera module and a conductive part, and the conductive part is located in a space between the antenna and the camera module. Electromagnetic waves radiated by the antenna can excite a first standing wave propagating along a first direction on the conductive part, the first standing wave comprises a first electric field, the first electric field can enable the conductive part to generate a first current conducted along the first direction towards one side of the first standing wave, and the anti-interference structure comprises a first conduction loss part; the first conduction loss part is located on the side, facing the first standing wave, of the conductive part, and the first conduction loss part is made of a current loss material; or the material of the part, facing one side of the first standing wave, of the conductive part is a current loss material. According to the anti-interference structure, the shell assembly and the electronic equipment provided by the embodiment of the invention, the problem of interference of the first standing wave on the camera module is effectively improved.

The invention relates to the technical field of test fixtures, in particular to a radio frequency power amplifier board test fixture which comprises a fixed seat, telescopic guide rods which are symmetrical to each other are fixedly connected to one side of the top of the fixed seat, a pressing plate is fixedly connected to the top ends of the telescopic guide rods, and an electric push rod is fixedly connected between the fixed seat and the pressing plate. A placing groove is formed in the top of the fixing base, a plurality of elastic probe pieces are installed on the pressing plate, the pressing plate which is pressed downwards can drive the elastic probe pieces to move and move towards a radio frequency power amplifier board placed in the placing groove, the elastic probe pieces are made to make contact with the radio frequency power amplifier board, and the radio frequency power amplifier board is placed in the placing groove through elastic components in the elastic probe pieces. The elastic probe piece can be in contact with each element on the radio frequency power amplifier board, so that the phenomenon that the elastic probe piece is not in contact with the element in place is reduced, the test error caused by the fact that the elastic probe piece is not in contact with the element is eliminated to the maximum extent, and the test accuracy of the radio frequency power amplifier board is improved.

Provided are a heat dissipation apparatus and an electronic device. The heat dissipation apparatus includes a heat dissipation module including at least two first liquid cooling plates arranged side by side and connected in series. Each first liquid cooling plate includes a liquid cooling channel with a liquid inlet and a liquid outlet. The liquid inlet of the first liquid cooling plate at one end is connected to a first liquid inlet pipe, and the liquid outlet or liquid inlet of the first liquid cooling plate at the other end is connected to a first liquid return pipe. For all the other liquid outlets and liquid inlets, two adjacent liquid outlets are connected through a connecting pipe, and two adjacent liquid inlets are connected through another connecting pipe.

The invention discloses an integrated power supply device capable of being flexibly disassembled, and belongs to the technical field of electric power systems, the integrated power supply device comprises a shell, a power supply body is mounted in the shell, a sealing mechanism is arranged in the shell, the sealing mechanism comprises a plurality of telescopic parts fixedly mounted in the shell, and sliding plates are fixedly mounted at the top ends of the telescopic parts; a cover plate is slidably mounted at the top end of the sliding plate, a cavity used for exhausting air from the telescopic part is formed in the shell, a screw rod is rotatably mounted in the cavity, and a moving plate is mounted on the surface of the screw rod in a threaded mode. And meanwhile, the sealing air bag expands to pressurize a gap between the cover plate and the shell, so that the gap is effectively filled, the sealing effect in the power supply is greatly enhanced, external dust, moisture and the like can be effectively prevented from entering the power supply, and a power supply body is protected from being corroded.

The invention relates to the field of ground station satellite communication, in particular to a high-shielding KaKu coaxial waveguide power amplifier device. Comprising a top plate, a bottom plate and peripheral side plates; the power amplifier assembly is arranged in the shell; the power amplifier assembly comprises a KaKu coaxial OMT waveguide which comprises a square waveguide and a circular waveguide; the transmission module comprises a receiving module and a transmitting module; a waveguide; a gas-permeable membrane; the radiating module comprises a radiator and a fixing plate of the radiator; the waveguide power amplifier device is used for solving the problems of large size, heavy weight, serious stray leakage of internal modules, difficulty in debugging and poor heat dissipation performance caused by insufficient compact layout in the existing waveguide power amplifier device. Synchronous polarization filtering in a Ka frequency band and a Ku frequency band and compact layout of internal modules are realized through the power amplifier assembly, so that the size and the weight of the power amplifier assembly are reduced, and debugging is facilitated; signal leakage loss and internal stray are reduced through the waveguide; the waterproof performance effect is improved through the breathable film and the waterproof sealing strip; the heat dissipation performance is improved through the heat dissipation module.

The invention discloses a circuit board optimization method applied to wind energy conversion, and the method comprises the steps: integrating a dynamic load matching module on a circuit board, collecting the voltage, current and frequency signals outputted by a wind turbine generator in real time, calculating the current wind energy conversion efficiency through an embedded controller, and combining with a preset maximum power point tracking algorithm, dynamically adjusting the switching frequency of the power semiconductor device; a layered heat dissipation structure is adopted, a circuit board base material is made of a high-thermal-conductivity composite ceramic material, a micro-channel cooling system is embedded in the circuit board base material, and the circuit board base material is connected with external heat dissipation fins through heat pipes; a thermoelectric refrigeration sheet is arranged below the power device, and the refrigeration power is dynamically adjusted according to the feedback of a temperature sensor, so that the temperature of a key device is maintained in a safe range of 50-80 DEG C; through a multi-objective optimization algorithm, the circuit loss, the heat dissipation efficiency and the electromagnetic compatibility are balanced, the circuit layout and the wiring path are optimized, and the influence of parasitic inductance and capacitance on the high-frequency switch is reduced.

Compact electronic devices, such as Access Points (APs), having airflow and cooling features are provided. According to one implementation, a compact electronic device including a housing having an interior and a plurality of vents for air ingress and egress. The plurality of electrical components located in the interior of the electronic device and a heat spreader located in the interior, disposed above the plurality of components and connected to the plurality of vents for the air ingress and egress. The heat spreader being configured to provide grounding and shielding for the plurality of electrical components and wherein the heat spreader includes chamber formed therein for supporting a fan module. The compact electronic device further comprises of a plurality of antennas for a plurality of frequencies, where the antennas are any of disposed within and formed as part of the house of the heat spreader.

The invention belongs to the technical field of magnetic field processing, and relates to an active anti-magnetic interference electroencephalogram acquisition system and method. The electroencephalogram collecting system comprises an electroencephalogram collecting electrode, an electroencephalogram amplifier, an anti-magnetic-interference assembly and a controller, the anti-magnetic-interference assembly comprises a magnetic shielding barrel, a coil assembly defining a shielding area is arranged in the magnetic shielding barrel, and a magnetic sensor is located in an effective area arranged in the shielding area; the magnetic sensor driver and the coil driver are arranged outside the magnetic shielding barrel; the electroencephalogram amplifier is arranged in the effective area; the magnetic sensor driver controls the magnetic sensor to collect a magnetic interference signal and send the signal to the controller; and the controller performs vector decomposition on the magnetic interference signal to obtain the magnetic field size of the coil assembly in each direction, generates a control instruction based on the magnetic field size in each direction and sends the control instruction to the coil driver so as to control the current size of the coil assembly, so that the coil assembly generates an offset magnetic field opposite to the magnetic field size in the corresponding direction in each direction. The invention also provides an active anti-magnetic interference electroencephalogram acquisition method.

The invention discloses a hardness self-adaptive adjustment high-voltage insulation shielding cover which comprises a composite insulation cover body, the composite insulation cover body sequentially comprises an outer insulation layer, a middle magnetorheological elastomer interlayer and an inner attaching layer from outside to inside, and a miniature electric field sensor is embedded in the surface of the outer insulation layer and used for monitoring the intensity of a surrounding electric field in real time; the flexible electromagnetic coil is embedded in the middle magnetorheological elastomer interlayer; the intelligent induction energy storage module is integrated in a lightweight waterproof box at the top of the composite insulation cover body and comprises a magnetic field controller, a micro super capacitor, an electric field signal processor and a pressure signal converter, and the magnetic field controller is connected with the flexible electromagnetic coil through a wire; through the three-layer structure design of the composite insulation cover body and corresponding material selection, double guarantee of insulation protection and self-adaptive fitting is realized.

The invention discloses an integrated filter preparation method and a filter, and belongs to the technical field of filter preparation. The preparation method comprises the following steps: S1, preparing a copper bar with an annular groove; s2, after the copper bar is subjected to surface strengthening treatment, a preformed part with a sealing rib structure is formed through one-time injection molding; s3, sleeving the pretreated magnetic ring, and performing dual fixation through mechanical interlocking and an adhesive; s4, performing secondary injection molding and embedding the metal shielding net to realize integrated packaging; and S5, carrying out whole-process on-line detection and forming traceability data. The fixing stability is improved through the mechanical interlocking design of the copper bar annular groove and the magnetic ring, the material binding force is enhanced in combination with surface strengthening treatment, the electromagnetic shielding effectiveness is improved by embedding the metal shielding net through secondary injection molding, and the product consistency is guaranteed in cooperation with full-process detection and intelligent parameter regulation and control. The waterproof and dustproof grade of the prepared filter reaches IP67, the electromagnetic shielding effectiveness is larger than or equal to 60 dB, the requirements of high-end scenes such as new energy automobiles and aerospace can be met, and the filter has wide application prospects.

The invention herein provides an electric machine for a vehicle's air-conditioner. The electric machine having a first housing to accommodate an electric motor, a second housing to accommodate an inverter unit, a first connector having a first terminal pin and a second connector having a second terminal pin. Both connectors are formed on an outer surface of the second housing and both terminal pins are adapted to pass through a wall of the second housing towards the inverter unit. The electric machine includes a first electrical connection is formed between the first terminal pin and the inverter unit inside the second housing and a second electrical connection is formed between the second terminal pin and the inverter unit inside the second housing. Further, the electric machine includes at least one partition wall formed between the first electrical connection and the second electrical connection inside the second housing.

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.

The invention discloses an anti-interference high-precision attitude sensitive measuring instrument which comprises a fixed shell, connecting plates are fixedly mounted at the top and the bottom of the fixed shell, a light shield is fixedly connected to the connecting plate at the top through bolts, four positioning screw rods are in threaded connection with the front side and the rear side of the fixed shell, and the positioning screw rods are in threaded connection with the light shield through bolts. And the interior of the fixed shell is fixedly connected with an I-shaped frame through bolts. The adjacent circuit boards are clamped and positioned through the shielding isolation plates, so that the installation stability is better, the internal structure is more complete when a satellite lifts off and bears huge gravity and acceleration, and the single boards with joints on the two sides of the combined circuit board are fixed on the two sides of the I-shaped frame through the positioning screw rods respectively, so that wiring is facilitated, and the reliability of the combined circuit board is improved. And the arrangement structure is more regular, so that the device has the advantages that the arrangement of the circuit board is redesigned, the device has better anti-interference performance, the arrangement is more regular, the occupied space is reduced, and the installation stability is improved.

A foldable electronic device according to an embodiment may include a display panel configured to be folded along a folding axis parallel to a first direction, a plurality of adhesive layers below the display panel, and positioned in an area excluding at least a portion of the folding area that forms a curved surface in a folded state of the display panel, and a magnetic shielding layer attached under the display panel through the plurality of adhesive layers.

A multifunctional intelligent calendar is provided, which includes an intelligent electronic calendar body and a magnetic attraction mechanism. A detachable shell covers the back of the intelligent electronic calendar body; the magnetic attraction mechanism includes magnetic attraction components located on an inner side and an outer side of the shell. In this way, the calendar is magnetically fixed, so that the calendar can be easily adsorbed on a surface such as a wall and a metal object, and can be stably fixed on an inclined surface, at a side-hanging position, or at a ceiling-mounted suspending position, which greatly expands use scenes of the intelligent calendar and effectively ensures practical functionality of the intelligent calendar.

The invention relates to a vehicle headlamp module comprising a circuit arrangement for controlling at least one function of a vehicle headlamp and a housing for accommodating the circuit arrangement, wherein the housing has a metallic, electrically conductive shielding surface towards the circuit arrangement for electromagnetic shielding of the circuit arrangement, wherein the circuit arrangement has a touch-sensitive surface section, wherein the touch-sensitive surface section has no electrical components arranged thereon and a flat section towards the shielding surface of the housing, wherein an electrical strip conductor and / or a contact extends along the touch-sensitive surface section, wherein a plurality of solidified, electrically non-conductive adhesive points are arranged on the touch-sensitive surface section, which adhesive points project in the direction of the flat section of the shielding surface of the housing from the touch-sensitive surface section for ensuring a minimum distance between the touch-sensitive surface section and the flat section of the shielding surface of the housing.

The present invention relates to a system comprising an electronic printed circuit board and a support frame for receiving the printed circuit board.

The invention provides a power module, an electric drive assembly and a vehicle, and the power module comprises a plurality of sub-power modules, and each sub-power module corresponds to one phase; the number of the lining plates is multiple, each lining plate is provided with a reference surface, at least one sub-power module in the multiple sub-power modules is provided with one lining plate, and the sub-power modules are located in the reference surfaces; a plurality of direct current power terminals, the plurality of direct current power terminals and the plurality of lining plates are arranged in a one-to-one correspondence manner, the direct current power terminals are located in the reference surface, and the direct current power terminals are arranged at one ends of the lining plates; the number of the alternating current power terminals is multiple, and the multiple alternating current power terminals and the multiple lining plates are arranged in a one-to-one correspondence mode; and the plurality of capacitors are arranged in one-to-one correspondence with the plurality of lining plates, and the capacitors are located between the sub-power modules and the direct-current power terminals. According to the invention, the problem of how to effectively suppress the voltage spike in the switching process by the power module in the prior art is solved.

The invention discloses a metal shell magnetic shielding structure of an electromagnetic coil heating source electrothermal furnace, which comprises a metal shell, a shell opening is arranged on the upper side surface of the shell, an electromagnetic coil corresponding to the shell opening is arranged in the metal shell, and a shielding plate is arranged on the upper side of the electromagnetic coil in the metal shell. The electromagnetic coil is used for generating an alternating magnetic field, so that the bottom of the iron pan generates induction eddy current heating under the alternating magnetic field, the energy transfer efficiency is improved, heat is quickly absorbed and uniformly dispersed, local overheating is reduced, and the service life of the electromagnetic coil is prolonged. Meanwhile, the shielding plate is arranged between the electromagnetic coil and the metal shell, an alternating magnetic field is shielded from acting on the metal shell, heating of the metal shell is avoided, the temperature of the metal shell is reduced by about 10 DEG C through experimental comparison, and the use safety is improved.

To improve the cooling performance while suppressing noise of an electronic apparatus including a high heat-generating electric component with a simple configuration.SOLUTION: In an electronic apparatus 100, a heat conduction component 170 includes: a shield part 160 covering an electric component 110 on a circuit board 120 and shielding noise; and a heat transfer elastic part 150 disposed on the upper surface of the shield part 160, the heat transfer elastic part transferring heat of the electric component 110 to a heat dissipation component 140. The shield part 160 is electrically connected to a ground connection part 130 on the circuit board 120 and is in contact with the electric component 110 with a predetermined pressure.SELECTED DRAWING: Figure 1

The application provides a power module and a solid-state transformer system, the power module comprising: a circuit module having a voltage level; and a cabin body for covering the circuit module by bending or splicing, and the cabin body having a shielding structure, the shielding structure comprising: a first conductor layer located on a side close to the circuit module and connected to the circuit module in an equipotential manner; a second conductor layer spaced apart from the first conductor layer and located on a side away from the circuit module; and a solid insulation layer arranged between the first conductor layer and the second conductor layer and used for electrically isolating the first conductor layer from the second conductor layer. The power module provided by the application has good insulation performance and is easy to assemble.

The invention discloses an aviation piston engine redundancy ignition system with an electromagnetic shielding function and an ignition method, and particularly relates to the field of engines. Comprising a first control module and a second control module, the two control modules are connected with two ignition coils through high-voltage damping wires respectively, and each ignition coil is connected with a spark plug mechanism through a high-voltage damping wire; the two spark plug mechanisms are arranged on an air cylinder of the engine; a shielding layer is coated outside the high-voltage damping wire; and the spark plug mechanisms are respectively and correspondingly sleeved with shielding shells. Based on the system, redundancy ignition control is adopted, two control modules are used, each control module can control two sets of independent ignition systems at the same time, release electric energy to two ignition coils at the same time, conduct ignition control, and can effectively restrain electromagnetic interference.

The present invention discloses an EMC wave-filter shielding structure including an EMC filter board; a lower shield cover that is installed on one side of the EMC filter board, and connected with the EMC filter board around to form a shielding cavity; a X capacitor, a Y capacitor, a first filter inductor and a second filter inductor that are all arranged in the shielding cavity and correspondingly connected with the EMC filter board, respectively; and an upper shield cover that is installed on the other side of the EMC filter board backing toward the shielding cavity, and directly opposite to the lower shield cover. The present invention increases the distance between an electromagnetic interference source and a control signal, and enhancing quality of control signals.

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.

The invention discloses a converter valve tower shielding case, and belongs to the technical field of high-voltage direct-current power transmission equipment. The shielding case comprises a plurality of shielding plates, the shielding plates are divided into not less than five coating thickness areas according to the electric field intensity gradient of the coverage area, the coating thickness is in positive correlation with the electric field intensity, and the coating thickness change rate between the adjacent areas does not exceed 20%; the coating is prepared from the following components in parts by mass: 0.95 to 1.05 parts of nickel powder, 0.4 to 0.7 part of magnetic fiber, 0.9 to 1.1 parts of amorphous magnetic powder and 8.8 to 9.2 parts of acrylic resin. The electric field intensity of the top and other key parts of the valve tower can be effectively reduced, so that the electrical breakdown or flashover phenomenon caused by electric field concentration is avoided, the manufacturing cost is reduced while the electrical performance is improved, and the service life of equipment is prolonged.

The present disclosure provides a power module and a solid-state transformer system. The power module includes: a circuit module, having a voltage level; and a cabin, configured to wrap the circuit module by bending or splicing, where the cabin has a shielding structure, the shielding structure including: a first conductor layer, located at a side close to the circuit module and equipotentially connected to the circuit module; a second conductor layer, arranged apart from the first conductor layer and located at a side away from the circuit module; and a solid insulating layer, provided between the first conductor layer and the second conductor layer for electrically isolating the first conductor layer and the second conductor layer. The power module provided by the present disclosure has good insulation performance and is easy to assemble.

A method for providing an electrically conductive layer for a plastic housing, in particular a splice housing for an electromagnetically shielded cable harness, comprises the following steps: a) providing an electrically conductive film and a mold; b) inserting the film into a mould; c) injection molding a plastic into the mold such that the injected plastic is bonded to the conductive film.

The application discloses a three-dimensional integrated packaging structure based on a dielectric integrated suspended line, which comprises N layers of dielectric plates covered with metal on both sides; the N layers of dielectric plates are stacked from bottom to top; the dielectric plates of any one or any multiple adjacent layers from the 2nd layer to the N-1th layer are patterned and hollowed to form at least one air cavity; metalized through holes are formed on the 1st layer to the Nth layer to form an electric wall around the air cavity; the 1st layer and the Nth layer together with the formed electric wall constitute an electromagnetic shielding cavity; the 2nd layer to the N-1th layer are electrically connected through a three-dimensional vertical interconnection technology; and one or more functional devices are arranged in each air cavity. The application can realize the collaborative design of functional devices, system circuits and packaging, reduce the influence of packaging on the performance of circuits, reduce the mutual interference between functional devices, facilitate individual debugging, reduce transmission loss, be favorable for realizing high-speed data transmission and improve system reliability.

The invention discloses an electromagnetic shielding film. The electromagnetic shielding film comprises an insulating layer and a shielding layer, the insulating layer is provided with a first side surface, and the first side surface is provided with a plurality of first open holes; the shielding layer is arranged on the first side face, a plurality of second open holes are formed in the shielding layer, the number of the second open holes is smaller than that of the first open holes, and at least part of the second open holes are communicated with the first open holes. According to the electromagnetic shielding film, the insulating layer is provided with the plurality of first open holes, and the shielding layer is provided with the plurality of second open holes which are at least partially communicated with the first open holes, so that the heat dissipation performance of the electromagnetic shielding film can be remarkably improved without forming a large number of holes with large apertures in the shielding layer; meanwhile, the shielding effectiveness of the electromagnetic shielding film is guaranteed, in addition, the number of the second openings formed in the shielding layer can be reduced while the heat dissipation performance is guaranteed, and therefore the shielding effectiveness of the electromagnetic shielding film can be further guaranteed.

An audio device, such as a microphone, may include a shield adapted to shield one or more components of the audio device from electromagnetic interference (EMI). The shield may be a metallic mesh structure that allows for audio to be processed through the shield while blocking electromagnetic radiation, such as radio-frequency (RF) electromagnetic radiation from RF transmissions from one or more wireless devices. The microphone may be adapted to engage and secure the shield with one or more components of the audio device (e.g., the housing). This advantageously improves the audio quality and performance by blocking or suppressing the electromagnetic radiation and resulting EMI.