136results 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.

A sensor module according to an embodiment of the present technology includes a housing, a sensor board, an external connector, a flexible printed circuit, and a metallic shield case. The flexible printed circuit electrically connects the sensor board and the external connector, the flexible printed circuit including a signal line and a ground line. The shield case includes a bottom portion that is arranged between the flexible printed circuit and the external connector. The external connector includes a first connection pin that is connected to the signal line, a second connection pin that is connected to the ground line, and a third connection pin that is connected to the bottom portion of the shield case. The bottom portion includes a first hole, a second hole, a third hole, and a thermal storage, the first hole being a hole through which the first connection pin passes, the second hole being a hole through which the second connection pin passes, the third hole being a hole through which the third connection pin passes, the thermal storage being provided around the third hole and covered with a solder material used to join the third connection pin to the bottom portion.

A module for use in a wireless communication apparatus for communicating with a terminal is provided. The module comprises a first printed circuit board, a PCB configured by stacking a plurality of substrates, a plurality of antennas formed on a first side of the first PCB, and a plurality of antenna modules for the plurality of antennas. Each antenna module of the plurality of antenna modules comprises a radio frequency integrated circuit, RFIC, chip, and a second PCB configured by stacking a plurality of substrates and configured to electrically connect the RFIC chip to the first PCB. A first side of the second PCB is coupled to a second side of the first PCB opposite to the first side of the first PCB via a grid array, and a second side opposite to the first side of the second PCB is coupled with the RFIC chip.

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.

A radar apparatus includes a board, a high-frequency integrated circuit mounted to the board, a metallic housing arranged to face the high-frequency integrated circuit, and a radio-absorbing and heat-dissipating unit. The radio-absorbing and heat-dissipating unit includes a radio-absorbing and heat-dissipative gel. The radio-absorbing and heat-dissipating unit is configured to cover at least part of the high-frequency integrated circuit and to be in contact with the metallic case.

The invention relates to a housing for an electric or electronic device. The housing includes a housing lower part, which is made of metal and is designed as a heat sink for dissipating heat generated by the device. At least two rivet pins are formed in one piece with the housing lower part. The housing includes at least one circuit board on which the device is formed in the form of electric and / or electronic components and conductor tracks. The circuit board is mounted in the housing lower part. The housing also includes a shielding plate for shielding against electromagnetic radiation and a housing upper part for closing the housing. The housing lower part, the circuit board, the shielding plate, and the housing upper part are sealingly connected to one another by forming rivet heads on the rivet pins.

A metal-foam structure is used to shield or reduce harmful electromagnetic waves that are generated by electronic devices. A metal-foam material has regulated pores and is incorporated in an electronic device. The metal foam structure shields, prevents, or reduces harmful electromagnetic waves generated by the electronic device from reaching the human body or interfering with a sensitive electronic component. This metal foam is a relatively lightweight material having regulated microscale pore structure. The pores in the metal foam can also form directionality relative to the direction of incoming electromagnetic waves for more effective reflection or absorption of electromagnetic waves. The metal foam can also be used as both an electromagnetic-shielding and a heat-dissipating component for electronics including popular consumer electronics such as mobile phones, notebooks, and high-power desktop computers.

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.

An underground utility locator is provided. The underground utility locator includes a wand, a GNSS module, a power module, a smoothing circuit, and a multi-layer enclosure. The wand has a top end and a bottom end and includes at least one antenna configured to output a field strength signal in response to an electromagnetic field. The GNSS module is coupled to the top end of the wand. The power module is coupled to the wand. The multi-layer enclosure at least partially surrounds the GNSS module and includes an outer shell layer and an inner shell layer. The outer shell layer and the inner shell layer are partially separated by an air gap.

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 electronic assembly includes a first printed circuit board (PCB) with a first ground layer and a second PCB with a second ground layer, separated by a gap. A metal frame resides in the gap, featuring an upper surface facing the first PCB and a lower surface facing the second PCB. The assembly incorporates a first electrically-conductive seal on the upper surface contacting the first ground layer and a second electrically-conductive seal on the lower surface contacting the second ground layer. In some embodiments, the metal frame extends about or adjacent to the perimeters of the two PCBs. In other embodiments, the metal frame is a local metal frame, partially surrounding a connector.

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.

The invention discloses an electromagnetic shielding heat dissipation case, and belongs to the technical field of electronic equipment shielding shells, the electromagnetic shielding heat dissipation case comprises a case shell, a heat conduction mounting plate and a shielding box, the case shell comprises a case body, a case cover and heat dissipation fins which are detachably connected, and the heat conduction mounting plate is arranged in the case shell and used for mounting components; the heat conduction mounting plate is in contact with the inner wall of the case shell to conduct heat out, the shielding box is arranged on the heat conduction mounting plate, and a shielding cavity for shielding electromagnetism is defined between the shielding box and the heat conduction mounting plate. Components are installed on the heat conduction installation plate with the high heat conduction coefficient to conduct out heat, key components and components prone to heating are placed in the aluminum shielding box with the high electromagnetic shielding performance, the heat conduction installation plate makes contact with the shielding box to conduct out heat, and non-key components and components not prone to heating are placed outside the shielding box. On the premise that good electromagnetic shielding and heat dissipation efficiency are guaranteed, the layout of the case shell is simpler and more compact, and space utilization is more reasonable.

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.

The invention belongs to the technical field of environment control of precision equipment, and discloses a large-space environment control cavity with a low-frequency electromagnetic shielding function, and the outer side of the environment control cavity is provided with a composite heat preservation electromagnetic shielding plate to form a totally-enclosed structure; an inner cavity of the box body is divided into a top-layer chamber and an equipment chamber from top to bottom; an air inlet cavity and an air return cavity are arranged in the top-layer cavity, the air inlet cavity is connected with an air inlet, the air return cavity is connected with an air return opening, and the air inlet and the air return opening are respectively connected with the precise constant-temperature air conditioner; a plurality of four-corner air return openings are formed in the peripheral side of the equipment cavity and connected with the air return cavity through built-in hoses, an airflow system with top air supply and four-corner air return is formed, so that holes needed by airflow circulation are reduced, the cavity shields thermal disturbance of the external environment, meanwhile, heat and small particles generated by equipment in the equipment cavity are eliminated, and the heat efficiency of the equipment is improved. And the temperature stability and high cleanliness in the equipment chamber are maintained.

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.

An electronic apparatus includes: a chassis formed of a conductive member and including an opening; a radiation source arranged in the chassis and radiating noise electric waves; and a conductor formed of a conductive member and arranged on a same side of the radiation source as the opening with at least a part of the conductor overlapping the opening in a plan view of the opening. The conductor has one end electrically connected to the chassis and the other end as an electrically open end.

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.