156results about "Screening casings" patented technology

An electronic device is provided, the electronic device includes a primary device assembly and an extension assembly. The primary device assembly includes a first housing and a primary body circuit, the first housing has a first accommodation cavity, and the primary body circuit is disposed in the first accommodation cavity. The extension assembly includes a second housing and an extension circuit. The second housing has a second accommodation cavity, the extension circuit is disposed in the second accommodation cavity, and the extension circuit is signal-connected to the primary body circuit, to extend or enhance functionality of the primary device assembly.

The application relates to the technical field of high-voltage switch cabinets, in particular to a high-voltage switch cabinet convenient to maintain, which comprises a cabinet body and a cabinet door arranged on the cabinet body, a through hole extending along the arrangement direction of the cabinet door and the cabinet body is arranged on the cabinet door, an observation window, a shielding plate with mesh holes and a shielding net are arranged on the cabinet door, the mesh holes of the shielding plate and the shielding net are different in size, the observation window, the shielding net and the shielding plate are sequentially arranged along the arrangement direction of the cabinet door and the cabinet body, and the observation window, the shielding plate and the shielding net are all located on the surface of the cabinet door close to the cabinet body and cover the through hole. The shielding plate with mesh holes and the shielding net are arranged to form a multilayer electromagnetic shielding structure, the shielding plate and the shielding net can filter electromagnetic interference of different frequencies in a synergistic manner, and the electromagnetic compatibility is significantly improved.

Provided is a clamshell housing for a human-machine interface comprising a plastic “C” cover assembly and a plastic “D” cover assembly, the plastic “C” cover assembly comprising a plastic keyboard cover or palm rest, having a plurality of snap fittings thereon for attachment to a plastic “D” cover assembly, a keyboard having a keyboard connector electrically connecting the keyboard to a printed circuit board (PCB), a trackpad having a trackpad connector electrically connecting the trackpad to the printed circuit board (PCB). The housing of the invention may be easily disassembled for repair or recycling.

The invention relates to the technical field of ultrasonic transducers, in particular to an ultrasonic transducer signal anti-interference transmission method and device, and the device comprises a signal preprocessing unit, an anti-interference unit, an isolation driving unit and a receiving demodulation and decoding unit. The signal preprocessing unit receives the original electric signal and performs differential amplification to generate a differential signal; the anti-interference unit collects the working environment temperature in real time through the temperature monitoring module, the coding strategy selection module and the modulation parameter control module dynamically select and optimize coding rules and adjust modulation parameters according to the working environment temperature, and the signal processing module converts differential signals into digital signals and completes coding modulation. The isolation driving unit performs signal isolation and power amplification; the receiving demodulation and decoding unit demodulates and decodes according to a corresponding rule and restores the ultrasonic signal; according to the invention, the coding rule, the modulation parameter and the heat dissipation strategy are dynamically adapted through temperature monitoring, the high-temperature performance drift of the anti-interference unit is inhibited, and reliable transmission of signals of the ultrasonic transducer is ensured.

The application relates to a convenient-to-assemble and convenient-to-disassemble millimeter wave shielding box in the field of millimeter wave shielding boxes. The millimeter wave shielding box comprises two end frames, a foldable first connecting frame and a second connecting frame arranged between the two end frames, the first connecting frame and the second connecting frame are arranged on a group of opposite side walls of the end frame, a supporting frame is hingedly arranged on another group of opposite side walls of the two end frames, the supporting frame is used for supporting between the first connecting frame and the second connecting frame, and a wave-absorbing panel is detachably and fixedly connected to the end frame, the first connecting frame, the second connecting frame and the supporting frame, and the wave-absorbing panels can cooperatively enclose a closed box body. The application can simplify the process of building the shielding box and improve construction efficiency.

A method of protecting an RF system from destructive effects of hazardous electromagnetic interference (EMI) comprises separating incoming electromagnetic radiation including hazardous electromagnetic interference according to frequency into low frequency spectral components below a selectable cutoff frequency and high frequency spectral components above the selectable cutoff frequency, and routing the low frequency portion of spectral components which include a vast majority of energy contained in the hazardous electromagnetic interference to ground via a low impedance conductor.

The invention provides a multi-channel power supply system in a self-sustaining energy type underwater closed cabin. The multi-channel power supply system comprises a self-sustaining battery, a power supply control board, an integrated communication circuit, a multi-channel output load circuit, a power supply system external trigger on-off controller and a power supply system external communication interface, the self-sustaining battery is connected with the power supply control board through the onboard rectangular connector; the power supply control board comprises an input connector, a filter circuit, an integrated circuit wall-attached heat conduction shell and an output interface; the integrated communication circuit is arranged on the power supply control board, is connected with an external communication interface of a power supply system and is used for receiving an external trigger instruction and sending internal state information; the power supply system external trigger on-off controller is connected with the integrated communication circuit so as to control on-off of the power supply system based on an external trigger signal; the multi-channel output load circuit comprises a plurality of output channels, each output channel comprises a relay, and the relays are connected with the integrated communication circuit so as to control output on-off based on the internal state information and the external state information.

A battery apparatus includes a casing and at least one first insert disposed on the casing. The first inserts has an electromagnetic shielding layer. The battery apparatus further includes at least one second insert disposed on the casing. The first insert and the second insert are arranged at intervals. The electromagnetic shielding layer of the first insert is electrically connected to the casing through the second insert.

A terminal device is provided, including a housing, a circuit board, a heat generation component, an air duct, a heat dissipation member, and a fan apparatus. The housing is provided with an air inlet hole and an air outlet hole. The circuit board is disposed in the housing. The heat generation component is disposed on the circuit board. The air duct is disposed between the housing and the circuit board. The air duct includes an air inlet and an air outlet. The air inlet communicates with the air inlet hole. The air outlet communicates with the air outlet hole. The heat dissipation member is disposed at a position that is in the air duct and that is close to the air outlet, to receive heat conducted by the heat generation component. The fan apparatus is disposed at a position that is in the air duct and that is close to the air inlet, to guide an airflow to the heat dissipation member, so that heat of the heat dissipation member is dissipated to an exterior of the housing sequentially through the air outlet and the air outlet hole via the airflow. In this application, a heat dissipation system including the heat dissipation member, the fan apparatus, the air duct, and the like is disposed inside the terminal device. This can implement active heat dissipation to achieve efficient cooling of the heat generation component, thereby enabling the terminal device to achieve good performance during running in a high-load scenario.

The invention discloses a precision measurement circuit protection method and device, and the method comprises the following steps: providing an electromagnetic shielding housing which is provided with an accommodation cavity for accommodating a precision measurement circuit; a phase-change material layer is arranged on the inner wall of the accommodating cavity, and the phase-change temperature of the phase-change material is in a normal working temperature interval of the precision measurement circuit; the precision measurement circuit is arranged in the accommodating cavity and is connected with a uniform temperature plate through a heat-conducting medium layer, so that heat generated by the precision measurement circuit can be transmitted to the uniform temperature plate through the heat-conducting medium layer; a temperature detection control unit is arranged and used for detecting the temperature of the vapor chamber in real time; and when the temperature of the uniform temperature plate exceeds a preset threshold value, a temperature control execution mechanism is started to carry out active temperature adjustment on the uniform temperature plate.

The embodiment of the invention provides a noise reduction device, and relates to the technical field of vehicles, the device comprises a shell and a function part; wherein the shell is made of an electromagnetic shielding material, an inner cavity of the shell is used for containing the high-voltage wire, and the high-voltage wire is used for transmitting electric energy in a vehicle; a function part is attached to the inner wall of the inner cavity and used for absorbing force generated by vibration of the high-voltage wire. Based on the device, the shell made of the electromagnetic shielding material is used for containing the high-voltage wire, electromagnetic radiation generated by the high-voltage wire in the electric energy transmission process is effectively shielded, and vibration noise generated when the electromagnetic radiation acts on parts outside the high-voltage wire is restrained. In addition, vibration of the high-voltage wire in the electric energy transmission process is absorbed through the function part, so that vibration of other parts in contact with the high-voltage wire driven by the high-voltage wire is effectively inhibited, and vibration noise of the whole vehicle is further reduced. The embodiment provided by the invention can be applied to intelligent automobiles or new energy automobiles.

Disclosed is a display device mounted in a vehicle including a display panel, a fixing plate surrounding side surfaces and a rear surface of the display panel and having an opening defined therein, a printed circuit board connected to the display panel and located in the opening, and a back cover covering the fixing plate and the printed circuit board and made of a conductive material, wherein the back cover includes a first protrusion in contact with the printed circuit board. The display device reduces EMI noise caused by electromagnetic waves emitted between electronic components mounted on the printed circuit board via the back cover made of the conductive material.

To provide a printing device configured to prevent electromagnetic waves generated when a motor operates from having influence on a connector.SOLUTION: The printing device is provided with: a motor; a conveying mechanism that conveys a medium by power of the motor; a printing mechanism that performs printing on the medium being conveyed by the conveying mechanism; a printing processor that controls the motor, the conveying mechanism and the printing mechanism; a connector which a cable for communicating with the outside is connected to; a substrate mounted with the printing processor and the connector, which transmits a signal inputted from the connector to the printing processor; a first metal plate partitioning a space between the substrate and the motor; a second metal plate positioned above the substrate and having a through-hole formed therein; a third metal plate; a fourth metal plate; a fifth metal plate; and a sixth metal plate. The first plate to the sixth plate surround the substrate, and the cable is connected to the connector through the through-hole, where the through-hole is covered with a metal cover.SELECTED DRAWING: Figure 5

The present invention provides an environmental testing device, comprising: a heat-insulating chamber which includes a test chamber and is formed by an electrically conductive heat-insulating plate; an air conditioner; the heat insulation chamber comprises a chamber main body with an entrance and an exit and a door body for opening and closing the entrance and the exit, the heat insulation plate forming the chamber main body comprises an outer plate and an inner plate arranged on the inner side of the outer plate, and the air supply fan is used for generating air flow enabling the air conditioned by the air conditioner to flow into the test chamber. A heat insulation plate forming a chamber main body and a heat insulation plate forming a door body are connected in a mutually electrically conductive manner, and the heat insulation plate forming the chamber main body is provided with an opening through which at least one of a shaft of an air blower and a part of a component forming an air conditioner is inserted. And a shield box which is attached to the insulation plate having the opening so as to cover the opening from the outside of the insulation chamber, is electrically conductive to the insulation plate, is formed of an electrically conductive member, and defines a space by the shield box and the insulation plate having the opening.

The invention discloses an electromagnetic shielding shell of an electromagnetic shielding room, which belongs to the technical field of electromagnetic shielding and comprises an electromagnetic shielding room body, a plurality of electromagnetic shielding shells are arranged in the electromagnetic shielding room body, and thermal power generation components and temperature sensors are mounted in the electromagnetic shielding shells. A multi-layer composite shielding structure is formed by the wave-absorbing cone, the phase regulation corrugated plate and the lattice-like lining layer, a broadband absorption system with complementary functions is formed, waste heat can be converted into electric energy by arranging the thermal power generation assembly, the temperature sensor and the ventilation groove, self-sustaining electric power is provided for the temperature sensor, and the temperature sensor is protected from being damaged. The state of the wave-absorbing material is evaluated in real time by analyzing temperature data, health early warning and preventive maintenance are achieved, the lattice-like lining layer can adjust lattice parameters to customize electromagnetic performance, the porous structure gives consideration to mechanical performance and shielding effect, the weight of the shell can be reduced, and the structural adaptability of the shell can be improved.

The invention relates to the technical field of electromagnetic compatibility assembly of electronic devices, and discloses an assembly system of an electromagnetic compatibility shielding shell of a piezoelectric buzzer. The system comprises a simulation assembly generation module, an acquisition monitoring module, an anomaly detection and association module, a path correction and optimization module and an execution and report module. According to the system, the actual pose and electromagnetic parameters of a tool head are synchronously collected in the assembling process, and electromagnetic correlation abnormal points having key influences on electromagnetic performance are recognized from mechanical abnormal points through time alignment and condition screening. And generating a correction path based on the points, and dynamically and finely adjusting path coordinates according to real-time deformation feedback during execution to form a final assembly path. According to the system, online correlation diagnosis and closed-loop control of the mechanical assembling process and the electromagnetic performance of a product are achieved, and the system adapts to workpiece deformation through dynamic path compensation, so that the consistency of the assembling quality and the electromagnetic shielding effectiveness is improved.

This invention discloses a novel electromagnetic shielding material—a Wideband Energy Selective Surface (WESS)—that possesses broadband characteristics and can adaptively adjust its electromagnetic properties by sensing the intensity of spatial electromagnetic fields. Compared to traditional ESS, WESS offers a wider shielding bandwidth and higher shielding effectiveness. This invention comprehensively designs the WESS through simulation methods, structural design, and simulation optimization. In this design, a small-sized, low-parasitic-capacitance, and highly responsive Schottky diode is used, and two equivalent circuits in switching states are extracted. The switching states of the diode are used to simulate the high and low power of the incident electromagnetic wave. Then, the two equivalent circuits are loaded into the designed structure, and the frequency response in both states is obtained through simulation optimization, achieving the required wide shielding bandwidth and high shielding effectiveness.

The invention discloses a manufacturing method of an electromagnetic protection shielding ring. The manufacturing method comprises the steps of anti-friction groove part design, anti-protrusion part design (thick edge design), anti-falling bonding technology (epoxy glue technology) and 0.3 mm thin shielding ring machining technology (machining technology after pressing). The design method is suitable for plane anti-corrosion and anti-leakage shielding structure design of immersed electromagnets, motors and the like, electrified electromagnetic structures such as the motors or the electromagnets and the like can be shielded, insulation damage or iron core corrosion caused by immersion of internal coils of the electrified electromagnetic structures can be avoided, and electromagnetic energy loss can be reduced through the design of the 0.3 mm thin shielding sleeve; the design of the anti-friction groove part and the anti-projection part can avoid the shielding damage caused by the contact and friction between the shielding structure and other structures in use, has better stability and reliability, and is especially suitable for the physical shielding protection of a small-air-gap rotary motion electromagnetic structure.

Provided is a metal detector that reduces capacitive coupling between a transmitting coil and a receiving coil and is easy to handle. A metal detector that determines whether or not metal is contained in an inspection object, the metal detector including: a housing; a transmitting coil and a receiving coil disposed inside the housing; a holding material configured to hold the transmitting coil and the receiving coil in the housing; and a shield member disposed between the transmitting coil and the receiving coil. An electrical resistivity of the shield member is higher than an electrical resistivity of the housing.

The invention discloses a liquid cooling system for an electromagnetic shielding cabinet and a control method. The liquid cooling system integrates a power sensor, a temperature sensor array, a fuzzy PID controller, a frequency conversion circulating pump, an electric proportional valve, a heat exchanger, a liquid cooling distribution unit and an Internet of Things monitoring module. The control method comprises the following steps: performing multi-source data synchronous acquisition and state fusion analysis; carrying out thermal load prediction and multi-time scale prediction by using a physical-based neural network; a fuzzy PID controller is constructed into a differentiable neural network structure, and fuzzy rules and membership function parameters are optimized online by using a depth deterministic strategy gradient algorithm; a digital twinborn model-based actuator dynamic compensation and multi-modal health monitoring fusion is introduced, and early fault early warning and local training are carried out. The heat dissipation efficiency and the operation stability of the liquid cooling equipment are ensured, and the heat dissipation performance and the temperature uniformity of the liquid cooling system are improved.

The application discloses a kind of self-adapting electromagnetic shielding touch display module, belong to display module technical field, including touch component and liquid crystal display component, and the top of the side edge of liquid crystal display component is equipped with copper foil between the top of touch component, the top of copper foil is covered with pressing plate, and pressing plate is fixed between the top of touch component and liquid crystal display component, annular through slot is set in the middle position of the top of pressing plate, the top of pressing plate is fixed with fixed ring, and annular through slot is located in the inside of fixed ring.The application is covered with copper foil in the outside of touch component and liquid crystal display component, and local formation outer shielding layer, then setting first metal grid and second metal grid in the middle of outer shielding layer, rotating first metal grid by using rotating mechanism can dynamically adjust shielding layer combination while ensuring the heat dissipation effect of device, change grid included angle, change the attenuation ability of different frequency electromagnetic wave, improve the effect of anti-interference, and the practicality is higher.

This invention discloses a shielding device and a magnetically controlled capsule endoscope system. The shielding device is used to shield a strongly magnetic control component supported by a support frame. It includes a shielding cover and a lifting mechanism. The shielding cover is connected to the lifting mechanism, which drives the shielding cover to slide towards or away from the control component. The shielding device also includes a limiting structure that contacts the control component and / or the support frame to restrict movement of the control component supported by the support frame. This invention effectively shields the magnetic field of the control component by using a shielding device.

The invention relates to a radiation environment monitoring camera, in particular to a gradient shielding camera based on a radiation direction gradient and a manufacturing method of the gradient shielding camera, and solves the problems that most of wall thicknesses are wasted, the light path adaptability is poor, and cameras of multiple specifications cannot be compatible in an existing shielding structure adopting a uniform wall thickness design. The device comprises a shell, a reflecting mirror, a lead shielding body and a camera movement, the position of a movement mounting cavity is positioned by calculating the thickness of a lead shielding layer, and the camera movement does not need to directly face a radiation field through reflection of the reflecting mirror, so that the influence of radiation on the camera movement is further weakened; due to the fact that the non-uniform wall thickness design is adopted in the lead shielding body, invalid loads are reduced, unnecessary material use is greatly reduced, the weight of the whole device is reduced, and meanwhile the manufacturing cost is reduced. The non-uniform wall thickness design is adopted, so that the position and the size of the window can be flexibly adjusted while necessary protection is ensured, and the device is suitable for camera movements of different sizes and types.

The invention provides a metal detector which suppresses electrostatic coupling between a transmitting coil and a receiving coil and is easy to operate. This metal detector (1) determines whether or not a metal is mixed in a subject (W). The metal detector (1) is provided with: a housing (11); a transmission coil (12) and reception coils (13A, 13B) disposed within the housing (11); a holding material (14) that holds the transmission coil (12) and the reception coils (13A, 13B) in the frame body (11); and a shield member (16) disposed between the transmission coil (12) and the reception coils (13A, 13B). The resistivity of the shield member (16) is higher than the resistivity of the housing (11).

An electronic device includes a motherboard, a metal shielding cover, a near field communication (NFC) antenna module, and a shielding member. The metal shielding cover covers one side of the motherboard and includes a top surface away from the motherboard and an accommodating groove recessed in the top surface. The near field communication antenna module is disposed in the accommodating groove, and the near field communication antenna module is signal-connected to the motherboard. The shielding member is disposed on the top surface and includes a sensing area corresponding to the near field communication antenna module. The sensing area includes multiple through holes and a support structure located between the through holes.

Power module (10) for a converter for use in a vehicle that is at least partially electrified, wherein the power module (10) has the following: - at least one power switch (12) that can be switched to convert an input current into an output current, - several power terminals (14, 15, 16) which are electrically connected to current electrodes (18, 20) of the circuit breaker (12) and are designed to supply the input current or to draw the output current, - at least one signal pin (22, 22a,b) designed to imprint a control signal generated by a control device (30, 30a,b) onto a control electrode (24) of the circuit breaker (12), and - an electrically conductive shield (26) that is galvanically isolated from the signal pin (22, 22a,b) and at least partially surrounds the signal pin (22, 22a,b).

This invention discloses a multi-layer chip shielding structure and its fabrication method, relating to the field of shielding technology. The structure includes a metal shield, which is a multi-layered structure comprising a suppression layer, an absorption layer, and a reflection layer. While still using a metal shield to form the shielding structure, this invention differs from existing technologies in that it employs a multi-layered structure. The innermost layer is a suppression layer made of nano-silver coating or gradient porous metal foam, achieving suppression of near-field electric fields. The absorption layer enables high-frequency absorption without heat buildup. The reflection layer reflects low-frequency electromagnetic waves, achieving low-frequency reflection. This invention, while using a metal shield as the shielding structure, introduces a multi-layered design, effectively overcoming the limitations of single-layer shielding structures in high-frequency signal shielding, the tendency for heat buildup in plastic-encapsulated shielding, and the narrow bandgap of composite material shielding.

The embodiments of the present disclosure relate to a solid state drive. According to embodiments of the present disclosure, the solid state drive may include a notch fastening part in which a notch connecting the solid state drive and a platform outside the solid state drive is fastened, a coupling part coupled to the socket of the platform, and a bottom plane that is a printed circuit board (PCB) plane that forms a cavity between the top plane of the platform when the coupling part is coupled to the socket of the platform.

The invention belongs to the technical field of electric driving of electric vehicles, and particularly relates to a motor controller for an electric vehicle, which comprises a motor controller shell, an isolation power supply module, a PCB (Printed Circuit Board), a high-voltage power supply filter, a heat-conducting gasket, a low-voltage power supply filter and a ground piece between the PCB and the motor controller shell, according to the motor controller for the electric vehicle, the Y capacitor in the high-voltage direct-current power supply filter is mounted on the filter metal shell through the metal shell, and the filter shell is in contact with the motor controller metal shell through the exposed metal bottom surface, so that the grounding area is increased, and the motor controller has relatively good electromagnetic interference suppression efficiency; the motor controller used for the 800V platform electric drive system can meet related requirements, and the electromagnetic compatibility of the 800V platform electric vehicle is improved.

The invention discloses a differential vibration sensor, and particularly relates to the technical field of sensors. The differential vibration sensor comprises a shell assembly and a base connected with the outside of the shell assembly, the static plate assembly is fixed in the shell assembly through a plurality of fixing screws; the two moving plate assemblies are symmetrically arranged on the upper side and the lower side of the static plate assembly respectively, and each moving plate assembly comprises a moving electrode layer; the two elastic bodies are arranged on the outer sides, back to the static plate assembly, of the two movable plate assemblies respectively; wherein the static plate assembly comprises a static electrode layer, the static electrode layer and the moving electrode layer are oppositely arranged, and a gap is formed between the static electrode layer and the moving electrode layer to form a triboelectric effect structure; a plurality of guide studs are further fixed to the static plate assembly, and a guide hole is formed in the movable plate assembly. The differential vibration sensor provided by the invention realizes self-power supply by using a triboelectric effect, and does not need an external power supply.