105results about "Screening metallic containers" patented technology

The vehicle-mounted domain controller structure comprises a metal frame, a heat dissipation module, a top cover assembly and a bottom cover, a first installation cavity and a second installation cavity are integrally formed in the metal frame, and the two installation cavities are physically isolated through a continuous metal partition plate; a high-speed signal board is fixedly mounted in the first mounting cavity, and a main control board is fixedly mounted in the second mounting cavity; and the plate surface of the continuous metal partition plate is respectively parallel to the mounting plane of the high-speed signal plate and the mounting plane of the main control plate. According to the vehicle-mounted domain controller structure provided by the invention, through rigid physical separation and continuous electromagnetic shielding, effective isolation of a high-speed signal circuit and a high-power main control circuit in a physical space and an electromagnetic environment is fundamentally realized, and an inter-board coupling noise path is thoroughly blocked; and the signal integrity, the electromagnetic compatibility, the thermal management efficiency and the long-term reliability of the whole system are obviously improved.

A battery pack with electromagnetic compatibility (EMC) for an electric vehicle is presented that includes a battery pack housing, at least one battery module enclosed within the battery pack housing, and an electronics assembly enclosed within the battery pack housing, in which the electronics assembly comprises a DC-DC converter and an electronics assembly casing, wherein at least one of the electronics assembly and battery pack housing includes an electromagnetic interference (EMI) shield to enable EMC. The electronics assembly includes a battery management system (BMS) circuit board and a DC-DC converter control circuit board and a DC-DC converter power electronics board. The electronics assembly is of substantially a same dimension of a battery module, in which the EMI shield comprises at least one of a metallic screen, metallic wires, a metallic tape, a metallic sheet, a metallic coating, paramagnetic materials, carbon based materials and metallic and / or carbon particle-infused composites.

The invention relates to a power supply wall box with strong electromagnetic pulse combined protection and high shielding effectiveness, which belongs to the technical field of electronic equipment shielding square cabins and comprises a shell, an out-cabin panel, an in-cabin panel, a power supply lightning protection device and a combined filter. An out-cabin panel is installed at one end of the shell, an in-cabin panel is installed at the other end of the shell, and the shell is fixed to a cabin plate of the square cabin. And a plurality of connector sockets are arranged on the panels outside and inside the cabin in a one-to-one correspondence manner to form a plurality of groups of power interfaces. The plurality of combined filters are mounted on a mounting plate in the shell, the combined filters are connected in series in a power supply loop of a group of connector sockets, and the power supply lightning protection devices are mounted on an out-cabin panel and are connected into the power supply loop of the corresponding group of connector sockets. Through the integrated design of lightning protection, HEMP protection and EMI filtering of the square cabin power supply, and in cooperation with the structural design of the wall box, the problems that an existing square cabin wall box is single in protection function and does not have the lightning protection function, the HEMP protection function and the high shielding effect at the same time are solved.

The invention discloses a self-calibration strain test system and method for a propeller composite material, and solves the problems of high-precision measurement and real-time calibration of dynamic strain in a complex flow field environment. The core of the system comprises a linear fiber grating sensor array attached to the surface of a blade and an optical fiber demodulator integrated on a propeller hub, sensors are symmetrically arranged in the spanwise direction, and infrared transmitting / receiving devices in pairs intersect at the circle center O of the propeller hub when positioning is accurate, so that a global reference is formed; a single sensor is installed through a double-shaft flexible hinge, a shape memory alloy (SMA) wire driving mechanism is integrated, and spanwise / chordwise independent micro-motion calibration can be achieved according to infrared intersection point offset. A failure alarm is arranged in the sensor, gallium-indium-tin alloy is filled in hollow glass beads, alarm is triggered only when more than or equal to 3 beads are broken to form a conductive path, false alarm is avoided, and the problem of dynamic strain monitoring of the large-deformation composite propeller in high-pressure, low-temperature and strong-electromagnetic-interference environments is solved through the anti-electromagnetic-interference module.

The invention discloses an electromagnetic-thermal-stress collaborative optimization power module packaging device, which belongs to the technical field of electromagnetic compatibility and thermal management of power modules and comprises a cover plate and a five-surface metal shell. The cover plate is a PCB and is composed of a solder mask layer, a first insulating layer, a first shielding metal layer, a second insulating layer, a second shielding metal layer, a third insulating layer and a weldable metal layer which are sequentially stacked from top to bottom. The weldable metal layer is laid on the edge of the PCB. The weldable metal layer of the PCB is fixedly connected with the milling groove in the end face of the metal base through high-frequency induction tin soldering to form a totally-closed electromagnetic shielding cavity. The cover plate is a high-thermal-conductivity ceramic substrate, heat dissipation through holes are formed between the metal layers, the cover plate is in heat conduction connection with the end face of the five-face metal shell through the heat dissipation through holes, and efficient heat management is achieved. The invention has the advantages of excellent electromagnetic shielding performance, high heat dissipation efficiency, strong assembly reliability, compact structure and the like, and can be applied to the fields of communication base stations, aerospace and the like with strict requirements on electromagnetic environments.

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.

In order to improve a housing, in particular for an electrotechnical apparatus, comprising at least two housing parts which each have a connecting face, said connecting faces, in a closed state of the housing, facing one another along a connecting section, it is proposed that at least one of the at least two housing parts, along the connecting section, has at least one integrated protective section, in particular for EMC shielding and / or for mechanical protection.

A ruggedizing apparatus for electronic equipment in a spacecraft is provided that can achieve both a radiation shielding effect and a heat-dissipation effect. The ruggedizing apparatus includes: a pressure vessel that is filled with a coolant and places at least a heat-generating electronic circuit of the electronic equipment within the pressure vessel, wherein the heat-generating electronic circuit is immersed in the coolant; and a forced liquid-flow generator placed within the pressure vessel, wherein the forced liquid-flow generator causes the coolant on the heat-generating electronic circuit to move away from the heat-generating electronic circuit.

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 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.

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.

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.

The invention relates to an unmanned aerial vehicle, comprising an autonomous power supply source (44), a central housing (14), in the internal volume of which is arranged electronic equipment electrically powered by the power source and at least one wing, which is motorized and laterally offset with respect to the central housing (14) by means of a rigid arm (20), for maintaining the electronic equipment in flight by propulsion or levitation on remote control. The central housing (14) comprises an electrically conductive wall (42) extending so as to protect the electronic equipment from any electromagnetic field external to the central housing (14). Each laterally offset rigid arm (20) of the motorized wing is hollow and the electrically conductive outer wall is electrically connected to the conductive wall (42) of the central housing (14). Each wing motor is electrically powered by electrical wires (84) which extend within the corresponding laterally offset rigid arm (20) while being electrically insulated from its conductive outer wall.

An electronic device is disclosed. The electronic device may comprise: a housing comprising a metal portion, wherein the metal portion comprises a frame structure for forming a portion of the surface of the electronic device, and a plate structure extending into an inner space of the housing; a printed circuit board disposed on the plate structure; a camera module disposed on the plate structure, wherein the camera module comprises a connector coupled to the printed circuit board and the connector comprises a conductive pad electrically connected to a ground area of the camera module; a vapor chamber which is conductive and disposed between the plate structure and the printed circuit board and at least a portion of which faces the conductive pad of the connector; an electrical absorption member disposed between the vapor chamber and the conductive pad; an insulative adhesion member disposed between the vapor chamber and the plate structure; and a varistor for electrically connecting the vapor chamber and the metal portion. Various other embodiments identified from the specification are possible.

An electronic device includes: a circuit board on which an electronic component is mounted; and the shell is made of metal, and a circuit board is arranged in the shell. The housing has: an inner wall on which the circuit board is mounted and which surrounds the electronic component; and at least one protrusion disposed on a surface of the inner wall facing the circuit board and in metal-to-metal contact with the circuit board.

A modular field device which, in spite of a plastic housing, fulfills EMC requirements and is easy to manufacture includes a sensor module for determining a process variable. For the purpose of EMC-protection, a conductive enclosure is secured in an inner space of the housing and surrounds a first inner region. A first end region of the enclosure is oriented toward a passageway of the housing. An opposite, second end region of the enclosure is closed by a circuit board such that the inner region is electromagnetically shielded. Accordingly, also the evaluation module connected with the sensor module and serving for communication is EMC protected since it is arranged in the protected inner region on a surface of the circuit board facing the inner region.

A structure formed by placing a metal sheets one on another in a sheet-thickness direction, the metal sheets each having an electrically conductive base material covered with an insulating coating, the structure including: a protrusion provided on a first metal sheet of the metal sheets that are adjacent to each other and are fastened together with a screw, the protrusion protruding toward a second metal sheet; an elastically deformable portion provided on the metal sheet in such a manner that the elastically deformable portion surrounds the protrusion, the elastically deformable portion being elastically deformable at the time of the fastening with the screw; a protrusion disposed on the metal sheet in such a manner that the protrusion protrudes toward the metal sheet, and crosses the protrusion; and an elastically deformable portion provided on the metal sheet in such a manner that the elastically deformable portion surrounds the protrusion.

A bone conduction microphone is disclosed. The bone conduction microphone includes a circuit board, a housing engaged with the circuit board, a metal cover engaged with the circuit board for forming a first cavity, a vibration assembly, and a MEMS chip disposed in the first cavity. The metal cover includes a top wall and a side wall. The vibration assembly engages with the top wall for forming a second cavity and includes a vibration member and a spacer member. A first conduction cavity is formed by the housing, the vibration assembly, the metal cover and the circuit board. A vibration of the vibration member is transmitted to one side of the MEMS chip through the first conduction cavity, an acoustic channel of the circuit board and a back cavity of the MEMS chip. The bone conduction microphone reduces the electromagnetic interference and improves the SNR.

The present disclosure relates to a housing assembly for accommodating printed circuit boards (PCBs). The housing assembly comprises a first housing portion configured to accommodate a first PCB, a second housing portion configured to accommodate a second PCB, and a separating portion for separating the first housing portion from the second housing portion. The separating portion comprises a first separating region in which the first housing portion and the second housing portion overlap and a second separating region that extends beyond the second housing portion and covers the first housing portion. The second separating region comprises one or more convection openings.

A raised floor tile enclosure system that includes a pedestal, a bracket connected to the pedestal, and an equipment tray assembly supported by the bracket. The equipment tray assembly includes a bottom wall, at least one side wall that extends from the bottom wall and at least partially forms an interior volume, and a support plate movably positioned within the interior volume. The raised floor tile enclosure system further includes electronic equipment supported by the support plate and a floor tile coupled to the equipment tray that can enclose the interior volume. The support plate can move toward the bottom wall when the floor tile us coupled to the equipment tray. The electronic equipment can be received entirely within the interior volume when enclosed by the floor tile.

A Faraday shield, a semiconductor processing apparatus, and an etching apparatus are provided. The Faraday shield includes a plurality of conductive slices and a spacer interposed between adjacent two of the conductive slices to electrically isolate the adjacent two of conductive slices from one another. The conductive slices are separately arranged aside one another and oriented along a circumference of the Faraday shield. A coil is wound around the circumference of the Faraday shield.

A bone conduction microphone, comprising: a circuit board, which has an acoustic channel; a housing, which is connected to the circuit board in a covering manner to form an accommodating space; a metal cover, which is arranged in the accommodating space and is connected to the circuit board in a covering manner to form a first cavity, wherein the metal cover comprises a top wall spaced apart from the circuit board and a side wall located between the top wall and the circuit board; a vibration assembly, which is arranged in the accommodating space and is connected to the top wall in a covering manner to form a second cavity, wherein the vibration assembly comprises a vibration member spaced apart from the top wall and a spacer located between the vibration member and the top wall, and the housing, the vibration assembly, the metal cover and the circuit board enclose to form a first conduction cavity; and an MEMS chip, which is arranged in the first cavity and is fixed to the circuit board, wherein the MEMS chip has a back cavity, the acoustic channel communicates the first conduction cavity with the back cavity, and vibration of the vibration member is conducted to one side of the MEMS chip through the first conduction cavity, the acoustic channel and the back cavity. The bone conduction microphone can reduce the impact of electromagnetic interference and improve the signal-to-noise ratio.

The invention relates to a power electronics unit for a vehicle. The power electronics unit comprises: a housing; a partition that divides the housing into an interference reduction region and an interference source region and is configured to electromagnetically decouple the interference reduction region from the interference source region; a high voltage power electronics within the interference source region; a circuit board which is at least partially arranged in the interference reduction region, a low-voltage connection for a low-voltage signal is arranged on the circuit board in the interference reduction region, the low-voltage signal entering and exiting an upper-level vehicle system of the vehicle, and wherein the low-voltage connection is connected to the circuit board in the interference reduction region. A battery connection of the power electronics unit is arranged on the circuit board in the interference reduction region. The invention also relates to a vehicle having a battery, an electric motor and a power electronics unit.

A structure formed by placing a plurality of metal sheets (10, 20) one on another in a sheet-thickness direction, the plurality of metal sheets (10, 20) each having an electrically conductive base material covered with an insulating coating, the structure including: a protrusion (11) provided on a first metal sheet (10) of the plurality of metal sheets (10, 20) that are adjacent to each other and are fastened together with a screw (51), the protrusion protruding toward a second metal sheet (20); an elastically deformable portion (12) provided on the metal sheet (10) in such a manner that the elastically deformable portion (12) surrounds the protrusion (11), the elastically deformable portion (12) being elastically deformable at the time of the fastening with the screw (51); a protrusion (21) disposed on the metal sheet (20) in such a manner that the protrusion (21) protrudes toward the metal sheet (10), and crosses the protrusion (11); and an elastically deformable portion (22) provided on the metal sheet (20) in such a manner that the elastically deformable portion (22) surrounds the protrusion (21), the elastically deformable portion (22) being elastically deformable at the time of the fastening with the screw (51). The end of the first protrusion (11) and the end of the second protrusion (21) contact each other at the time of the fastening with the screw (51).

To provide a board connector which enables reduction of noise, and to provide a device.SOLUTION: A board connector 10 of the disclosure is attached to a circuit board 50. The board connector 10 includes: a housing 11 having a hood part 15 which is open to the front and having a rear wall 30 provided at the opposite side of a front end part 16 where the hood part 15 is open; an outer conductor 20 which penetrates through the rear wall 30 to be fixed to the housing 11; an insulative dielectric body 19 disposed within the outer conductor 20; an inner conductor 18 disposed within the dielectric body 19; and an earth spring 40 connected to the outer conductor 20. The hood part 15 has: a first wall 15A disposed at the opposite side of the circuit board 50; a second wall 15B disposed at the circuit board 50 side; and a third wall 15C connecting the first wall 15A with the second wall 15C. The earth spring 40 has: a first housing connection part disposed at the outer surface side of the first wall 15A; and a second housing connection part disposed at the outer surface side of the second wall 15B and the third wall 15C.SELECTED DRAWING: Figure 1

The invention discloses an ultra-wideband standing wave bridge based on an exponential gradient micro-strip balun and an assembly method thereof, which are used as directional devices in scenes such as a vector network analyzer and the like, and aim to solve the problem that the existing standing wave bridge is narrow in working band and is difficult to meet the ultra-wideband measurement requirement. The method is characterized in that the index gradual change microstrip Balun is adopted to realize balance-to-unbalance conversion so as to expand the upper limit of the working frequency; a ferrite magnetic ring is loaded at a single-end port of the balun so as to extend the lower limit of the working frequency; a film resistance technology is applied to minimize the influence of parasitic parameters; electromagnetic shielding is realized through a metal cavity structure, and a wave-absorbing material is adhered to the inner wall of the cavity to suppress cavity resonance. The ultra-wide working bandwidth of 10 MHz to 40 GHz is finally achieved, the frequency band from short waves to millimeter waves is covered, and the measurement requirement of a modern ultra-wide-band system can be effectively met.

A housing half (110) for a housing (100) comprising a housing half (110) and a further housing half (115) for an electrical component for a vehicle, includes a receiving surface (130) that extends circumferentially along an edge of the housing half (110) and is shaped to receive a sealant (120). It also includes a web (125) that extends circumferentially along an inner surface (145) of the receiving surface (130) facing an interior of the housing half (110) and has a smooth surface shaped to form an EMC seal together with a smooth counter surface (140) of the further housing half (115).Furthermore, the housing half (110) has a contour (135) that runs along an outer surface (150) opposite the inner surface (145) of the receiving surface (130) and is shaped to allow the formation of a sealant bead when the housing half (110) and the other housing half (115) are joined together to form the housing (100).

To provide a technology suitable for countering electromagnetic noise by utilizing metal contact between a circuit board and a housing.SOLUTION: An exemplary electronic device includes a circuit board carrying electronic components and a metal housing that houses the circuit board. The housing has an inner wall on which the circuit board is placed and that surrounds the electronic components, and a protrusion that is provided on a surface of the inner wall facing the circuit board and that makes metallic contact with the circuit board.SELECTED DRAWING: Figure 4

To provide electronic equipment capable of reducing a noise radio wave leaking out without employing a structure which shields an opening part of an enclosure with a conductive member.SOLUTION: An enclosure 4 is formed of an electrically conductive member, and has an opening part 4b. A carrier part 2 is arranged in the enclosure 4, and radiates a noise radio wave. The electrically conductive part 6 is formed of an electrically conductive member, and is arranged on the side of the opening part 4b about the carrier part 2 to overlap at least in part with the opening part 4b in plan view, one end being electrically connected to the enclosure 4 and the other end being an electrically open end.SELECTED DRAWING: Figure 2

The application discloses a kind of magnetoresistive rotary joint installation structures of anti-electromagnetic interference, to protect rotary joint, including rotating shaft, rotary joint rotor installation cylinder, rotary joint rotor, rotary joint stator, cover plate, shielding ground, connecting fastener, rotary joint stator installation base and end cover;Outer structure uses non-conductive non-magnetic material to directly isolate the magnetic field of rotary joint rotor and rotary joint stator, and inner structure forms the structure of metal cage to prevent external magnetic field interference, so that the output signal of rotary joint is not interfered by external electromagnetic field, not only can the installation of rotary joint stator and rotary joint rotor meet precision requirement, but also the signal of magnetoresistive rotary joint can be accurately output, so that motor can realize closed-loop operation.