27 results about "Faraday cage" patented technology

The utility model discloses a kind of inert gas monitoring devices for subway strong magnetic environment belongs to strong magnetic environment gas monitoring device technical field.The inert gas monitoring device includes control module, control module is provided with sensor;Shell, control module is installed in shell, the outer periphery of shell is covered with plating layer, plating layer is metal plating layer, make shell form faraday cage, faraday cage is hollow structure.The inert gas monitoring device is set by metal plating layer in the outer periphery of shell, make shell form faraday cage, to be able to shield induced electromagnetic field in machine room, guarantee sensor and control module can normally operate, so that the inert gas monitoring device can accurately collect the concentration of inert gas.When the concentration of inert gas is monitored to reach certain condition, control center will issue early warning, prevent staff from entering machine room under the condition that inert gas concentration is relatively high, avoid the health of staff is affected.

This invention discloses a double-layer bend-resistant flexible circuit board and its processing method, comprising: a core layer, wherein circuit layers are laid on both the upper and lower surfaces of the core layer. This invention has the following beneficial effects: functional layering and electromagnetic shielding are achieved through conductive patterns on the two circuit layers. The conductive patterns on the top circuit layer are arranged in a ring, serving as a complete grounding / shielding layer. Together with the four rings of conductive patterns at the bottom, they form an upper shielding and lower signal architecture, providing a stable reference plane and Faraday cage shielding for internal high-speed signals. This greatly suppresses signal crosstalk and external electromagnetic interference. Furthermore, through stress holes and protrusions, the openings form a controllable low-stiffness zone on the bending axis, actively guiding the uniform release of bending stress at this point. This protects fragile vias and delicate conductive pattern traces from fatigue fracture. Moreover, the protrusions wrapping around the conductive patterns can generate additional deformation space and buffer, dispersing the stress acting on the conductive patterns.

This invention belongs to the field of microphone technology, and specifically relates to a microphone and audio device. A microphone includes a microphone stand, and a pickup component, a touch module, a shielding structure, and a main control circuit board disposed on the microphone stand. The microphone stand has a pickup cavity, the pickup component is disposed within the pickup cavity, and the pickup component is positioned between the touch module and the main control circuit board. Both the touch module and the pickup component are electrically connected to the main control circuit board. The shielding structure surrounds the pickup component, isolating it from interference from the touch module, the main control circuit board, and the wires between them. By surrounding the pickup component with the shielding structure, a Faraday cage structure is constructed in three dimensions, forming a comprehensive electromagnetic isolation zone. This effectively isolates electric fields and high-frequency interference from the top touch circuit, side wires, and the bottom main control circuit board, improving the microphone's acoustic performance.

This invention discloses a self-powered noise suppression system for a Faraday cylinder. Based on a traditional Faraday cylinder device, this system adds a thermoelectric power generation module, a current sensor, an operational amplifier, a supercapacitor, and a DC / AC converter. The thermoelectric power generation module is installed on the outer wall of the Faraday cylinder and utilizes the Seebeck effect to convert waste heat generated by charged particles impacting the cylinder wall into electrical energy. This energy is then stored in the supercapacitor and used to power subsequent circuits. The current sensor detects the common-mode current, the operational amplifier generates an inverted reference signal, and the DC / AC converter converts the direct current into alternating current matching the reference signal and injects it across the measuring resistor, thus canceling common-mode noise. This invention achieves self-powering by recovering waste heat from the Faraday cylinder wall, effectively suppressing common-mode noise while improving system energy utilization, reducing system size, and lowering costs.

The present application relates to the technical field of current transformer, and discloses an anti-interference current transformer with sectional shielding winding of secondary winding, which comprises a closed composite core, a primary winding, a sectional secondary winding assembly, a sectional shielding mechanism and an adaptive current equalization shielding unit. The present application is systematically and cooperatively optimized from four dimensions of magnetic circuit, winding, shielding and grounding. Wide-band magnetic flux conversion and anti-saturation are realized through the radial layered composite core. The winding parameter consistency problem is solved through the sectional winding of the secondary winding and the independent insulation framework. The adjacent winding cross interference is blocked and the parasitic loss is reduced through the sectional Faraday cage shielding. The current unevenness and stray magnetic field are suppressed from the primary side source through the adaptive current equalization shielding unit. Finally, a unified discharge channel is provided for all interference currents through the single-point grounding system, so as to comprehensively improve the measurement accuracy and operation stability of the current transformer in the strong electromagnetic interference environment.

The utility model belongs to control technical field discloses a built -in controller's heat radiation structure and built -in controller, heat radiation structure includes shell and heat dissipation fin, shell has the shielding cavity of open setting, shielding cavity is used to install controller body, shell is installed in the stator of motor to close shielding cavity, shell is electrically conductive spare, heat dissipation fin is established on shell and is located the side of the opening of shielding cavity in the face, heat dissipation fin includes a plurality of arc fin of the circumferential extension setting along motor axle. Since the shell is installed on the stator of the motor, a "Faraday cage" shielding space is formed with the stator, interference is effectively reduced, and normal operation of the controller body is ensured. Since the heat dissipation fin includes a plurality of arc fins extending circumferentially along the motor shaft, the special-shaped heat dissipation fin can improve the heat dissipation effect in dynamic and static states and improve the heat dissipation efficiency.

The invention relates to the technical field of beam gates, and discloses a particle beam gate structure and a beam gate control device.The particle beam gate structure comprises a first polar plate group, a second polar plate group, a third polar plate group and a Faraday cage which are sequentially arranged; the first polar plate group is provided with a first electric field operation area for deflecting the electron beam; the second polar plate group is provided with a second electric field operation area and is used for reversely deflecting the electron beams passing through the first electric field operation area; the third polar plate group is provided with a first space and a third electric field operation area, the first space and the third electric field operation area are oppositely arranged, no electric field is arranged in the first space, and the third electric field operation area is used for deflecting a high-energy electron beam. The first polar plate group and the second polar plate group enable the low-energy electron beam to be incident to the Faraday cage after being subjected to two times of inclined deflection; the high-energy electron beam is incident to the Faraday cage after being deflected for three times, so that the problem that electron beams with different energies cannot be deflected by the beam brake under the same voltage in the existing design is effectively solved.

A radiation-free heating pad and a processing technology thereof is provided. The radiation-free heating pad includes heating wires, a fiber layer, a flexible shielding layer, and a reinforcement layer. The heating wires are uniformly arranged on the fiber layer in a serpentine pattern, a layer of aluminum foil is arranged on each of an upper side and a lower side of the fiber layer, and the aluminum foil tightly wraps the heating wire. The flexible shielding layer is arranged outside the aluminum foil, and the reinforcement layer is arranged outside the flexible shielding layer. The radiation-free heating pad is based on the Faraday cage effect, and an electromagnetic field generated when an electric current passes through the heating wire can be effectively counteracted by a double shielding structure composed of the aluminum foil and the flexible shielding layer.

This invention relates to the field of marine meteorological observation equipment technology, specifically a shipborne high-precision rainfall measurement device and method based on video image and attitude synchronization. The device includes a rain collection head, a main body, a multi-tube array rain gauge, an optical observation module, a main control module, and a temperature and humidity sensor. The main body, rain collection head, and bottom plate form a Faraday cage. The rain gauge is equipped with a damping and liquid-sealing structure to suppress liquid surface oscillations, and a variable diameter design amplifies liquid level changes. The measurement method synchronizes ship data with the attitude sensor, triggers image acquisition at the alignment moment, extracts the water level line using an algorithm, and calculates the rainfall using a variable diameter formula. The temperature and humidity sensor is linked to achieve temperature compensation and snow melting. This invention integrates attitude calibration and video image technology to form a closed-loop measurement process, possesses electromagnetic shielding and full-scene adaptability, and can effectively improve the accuracy and stability of rainfall measurement in shipborne environments. It is suitable for various ship observation scenarios in nearshore and ocean-going environments.

A method for providing a plasma for plasma treatment of a surface of a substrate, includes providing a process chamber with a substrate in the process chamber; and providing a shielding electrode grid in the process chamber so that a Faraday cage is formed around the substrate, or the part of the substrate to be processed. The shielding electrode grid is electrically conductive and is connected to ground or to a negative potential with respect to ground. providing a plasma in the process chamber. A voltage is applied to the substrate. The shielding electrode grid extends above the surface of the substrate to be plasma treated at a distance of less than or equal to 10 mean free paths of the ions in the plasma. A corresponding device performs a method for providing a plasma for plasma treatment of a surface of a substrate.

The application discloses a MEMS pressure and temperature integrated sensor with electromagnetic interference resistance and a preparation method thereof. The sensor is sequentially provided with silicon-on-insulator, a first interlayer, a polysilicon protective layer, a second interlayer and a metal protective layer from bottom to top. The buried oxygen layer of the silicon-on-insulator realizes dielectric isolation of a sensing unit and a silicon substrate; a P-type piezoresistor of a device layer forms a Wheatstone bridge through a metal lead wire to constitute a pressure sensing unit; and a metal thin film resistor of the first interlayer constitutes a temperature sensing unit. The polysilicon protective layer is connected with the device layer in an equipotential manner to form a Faraday cage type closed electromagnetic shielding cavity, and the metal protective layer is provided with an array of air holes matched with air holes, which is used for pressure conduction and electromagnetic protection. The application improves the measurement stability in a complex electromagnetic environment through multiple electromagnetic interference resistance designs, realizes device miniaturization through an integrated structure, and can realize batch production based on a mature MEMS process.

This utility model discloses a portable electromagnetic shielding system, including a shielding body, a floor assembly, and a shielding curtain, which are detachably connected to form a shielding chamber with a curved inner surface. The shielding body and the shielding curtain are inflatable modules with identical structures. Each inflatable module consists of adjacent composite shielding layers sandwiched by an inflatable interlayer and encased in an inflatable protective sleeve. The floor assembly includes a base plate, a composite shielding layer, and a floor protective sleeve. The composite shielding layers are electrically connected to form at least two closed electromagnetic shielding cages. Adjacent electromagnetic shielding cages are grounded through capacitors. Beneficial effects: This utility model, through the design of the shielding body structure and the conductive splicing with the floor assembly to form at least two closed Faraday cages with an outer layer encasing an inner layer, and with equally spaced insulating interlayers between adjacent Faraday cages, achieves portability, anti-resonance, and enhanced shielding effects through a capacitor connecting the inner Faraday cage to the outer Faraday cage, which is grounded.

The invention relates to a shielding device (100), wherein the shielding device (100) has at least one printed circuit board (102), electronic components (104) attached to the printed circuit board (102), a waveguide antenna (106) attached to the printed circuit board (102), and a metal heat distribution element (108), wherein the metal heat distribution element (108) is electrically conductively connected to the waveguide antenna (106), and wherein the waveguide antenna (106) and the metal heat distribution element (108) enclose the electronic components (104) attached to the printed circuit board (102) and are designed such that a Faraday cage (110) results from the waveguide antenna (106) and the metal heat distribution element (108).

This utility model discloses a crystal oscillator frequency vacuum testing module and device. The module includes a metal block, a probe welding circuit board, and several probe assemblies. The probe welding circuit board is disposed on the metal block, and the probe assemblies are spaced apart and pass through the metal block. Each probe assembly includes a probe sleeve and a thermally conductive insulating sleeve fitted onto the probe sleeve. Probes are inserted at both ends of the probe sleeve, and the upper end of the probe sleeve is welded to the probe welding circuit board. A circulating water channel is provided inside the metal block. This utility model conducts heat from the probes to the metal block through the thermally conductive insulating sleeve, and then dissipates heat from the metal block through water cooling. The cooling rate is greater than the heating rate of the probes, thus improving the testing accuracy of the probes. The metal block of this utility model surrounds the probes to form a Faraday cage effect, shielding external electromagnetic interference and further improving the frequency testing accuracy.

The application relates to an electromagnetic shielding system of an insulator detection device and a UAV-mounted insulator detection device, the insulator detection device comprising a hanging frame, a zero-value detector mounted on the hanging frame, and a detection needle electrically connected with the zero-value detector through a signal line, the electromagnetic shielding system comprising a detector shielding assembly, a floating shielding potential equalization network, and a signal transmission shielding assembly. The detector shielding assembly comprises a movable shielding member and an inner shielding member. The movable shielding member comprises a shielding box body and a movable cover plate, the shielding box body is arranged outside the zero-value detector, the shielding box body is provided with an opening, the movable cover plate is arranged at the opening, and the movable cover plate can be switched from a storage state to a closed state to close the opening under the driving of a driving mechanism, so that the shielding box body forms a fully-closed Faraday cage. The application can solve the problem that the detection signal is submerged and distorted by noise, improve the stability and accuracy of the zero-value detection data of the insulator, and meet the high-precision detection requirement of the high-voltage live operation scene.

The utility model discloses Faraday cage technical field's a kind of Faraday cage based on punched plate. Two Faraday cage punched plates are equipped with fastening washer one and fastening washer two for limiting Faraday cage punched plate, and fastening washer one fastens the Faraday cage punched plate of same plane, and fastening washer two fastens the Faraday cage punched plate of different plane. The utility model discloses the setting of fastening washer one and fastening washer two, can quickly Faraday cage punched plate is assembled into Faraday cage, it is easy to operate, need not welding between multiple steel net, and by the setting of connecting pipe, when rivet is tightened, the one end of sleeve pipe deformation will extrude the inner wall of one side of connecting pipe, so that arc sharp sharp block is clamped in the inner wall of hole cavity, and then increase the stability between square block and Faraday cage punched plate, so that when transporting Faraday cage, fastening washer one and Faraday cage punched plate are not prone to loosening.

A novel capacitive micromachined ultrasonic transducer (CMUT) array is provided and the CMUT array employs an additional electrically-addressable conductive shield that isolates each array element individually, hence the novel array is coined as Faraday Caged CMUT array. The state of this conductive shield corresponding to each array element can be set as floating for reduced parasitic and cross-coupling capacitance or grounded for reduced electrical crosstalk. Perpetual, reliable operation in floating state without the risk of catastrophic dielectric electric field breakdown event is enabled by the self-discharging mechanism through diamond emitters featuring high field emission efficiency and acting as lightning rods in a cavity. The lightning rod structure features a movable diamond membrane, which deflects towards the diamond emitter due to electrostatic force (acting as a charge-controlled capacitive device) closing the gap to facilitate the safe intermittent discharging.

This invention relates to the field of lightning protection technology for offshore platforms, specifically to an active lightning protection method and system for offshore platforms. The method includes early warning monitoring, UAV deployment, active lightning attraction, and recovery and reuse. High-risk lightning strike locations are determined using lightning early warning equipment. A rotary-wing lightning-attracting UAV is controlled to fly to a safe distance from the platform. During ascent, a conductive metal wire is released to create a conductive channel. Lightning is then attracted by a lightning rod, and the charge is conducted to the sea surface. After completion, the UAV is recovered and reused. The system includes modules for early warning monitoring, UAV lightning attraction, control, and recovery and maintenance. A lightweight Faraday cage is installed on the outside of the UAV for lightning protection shielding. This invention achieves dual protection against both direct and indirect lightning effects, is adaptable to harsh marine environments, has high lightning attraction efficiency, reusable equipment, reduces protection costs, and is suitable for various fixed and mobile offshore platforms, possessing broad engineering application value.

This invention relates to a conductive bonding module and a brushless DC motor. The conductive bonding module is used in a DC motor for a drone and includes a through-type component, a bearing, and a fixing plate. The DC motor includes a stator and a rotor arranged coaxially, with the stator disposed inside the rotor. The through-type component passes sequentially through the rotor and stator from the axis of the DC motor and extends from below the stator. The bearing passes through the through-type component and is disposed between the through-type component and the upper surface of the rotor, and within the stator, overlapping with the lower surface of the rotor. The fixing plate is disposed below the stator and overlaps with the lower surface of the stator. The conductive bonding module overlaps between the stator and rotor of the motor, making the brushless DC motor an equipotential body, forming a Faraday cage, reducing the electromagnetic radiation of the drone's power system, thus eliminating the need for additional shielding structures. Simultaneously, the conductive bonding module has advantages such as good heat dissipation, small size, high reliability, and strong adaptability.

The application relates to the field of oil-immersed devices, and discloses an explosion-proof device of an explosion-proof membrane of an oil-immersed equipment lifting seat. In the application, the explosion-proof oil tank serves as an oil storage component, the bottom surface of the explosion-proof oil tank is connected with a supporting insertion rod, a connecting socket and a ceramic bearing table serving as an assembly with insulation properties, the bottom of the supporting insertion rod, the connecting socket and the ceramic bearing table serving as a supporting assembly is connected with a metal base and a metal strip frame to form a metal cage assembly as a whole, and a grounding assembly is formed by a metal floor, a grounding insertion rod, a grounding sleeve, a grounding wire and a grounding base, so as to form a protective assembly similar to a Faraday cage in cooperation with the cage assembly, so that the explosion-proof oil tank in the interior can still keep the electric potential stable under the condition of a relatively large surrounding charged environment or electric shock, the possibility of explosion in the explosion-proof oil tank is avoided, and the cage assembly also plays a protective role to avoid the collision of the explosion-proof oil tank.

The application discloses a kind of electrostatic chuck processing methods for semiconductor, to solve the shortage of easy discharge breakdown phenomenon in the process of electrostatic chuck sand blasting processing.The application is processed on the surface of electrostatic chuck air groove, adopt three layers of covering film, conductive cloth will the upper surface, side and bottom of entire electrostatic chuck be wrapped tightly, create the effect of faraday cage.Electrostatic charge formed on the surface of electrostatic chuck in the process of sand blasting can be conducted away in time through conductive cloth, avoid static electricity accumulation, produce discharge phenomenon and break down electrostatic chuck.Electrostatic chuck surface convex point processing, antistatic tape will the part of electrostatic charge formed on the surface of electrostatic chuck in the process of sand blasting be conducted away in time through antistatic tape, avoid static electricity accumulation, produce discharge phenomenon and break down electrostatic chuck.The electrostatic chuck processing method for semiconductor of the application can avoid the discharge breakdown phenomenon in the process of electrostatic chuck sand blasting processing.

This invention discloses a probe module for testing crystal oscillators, comprising a test circuit board, a metal block, a probe circuit board, and several probe sleeves. Probes are inserted into both ends of each probe sleeve. The metal block has holes for the probe sleeves to pass through, and each probe sleeve passes through the metal block. The probe circuit board is fixed to the metal block, and the front end of each probe sleeve is soldered to the probe circuit board. The probes at the ends of the probe sleeves are electrically connected to the test circuit board. This invention utilizes a metal block outside the probe sleeves to create a Faraday cage effect, shielding against external electromagnetic interference. This invention also allows for the simultaneous testing of multiple crystal oscillators, improving testing efficiency.

This application relates to an optical receiver and an optical signal transmission device. The optical receiver includes: a circuit board, at least one optical module receiver, and a multi-channel optical input component. The optical module receiver includes a metal structural component, an optical receiving component, and a photoelectric conversion component. The metal structural component is fixed to one side of the circuit board and forms a closed space with a portion of the circuit board. The photoelectric conversion component is disposed within the closed space on the circuit board. The optical receiving component is disposed on the surface of the metal structural component facing away from the circuit board. Both the metal structural component and the circuit board are grounded. The optical input component is connected to the optical module receiver via an optical fiber. Because the embodiments of this application can form a "Faraday cage," the receiving performance of the optical module receiver can be improved. Therefore, the optical module receiver can receive long-distance, multi-channel optical signals with high speed and anti-interference capabilities. When receiving long-distance transmitted optical signals, the signal quality of the received optical signal can be significantly improved.

The utility model belongs to the technical field of unmanned plane, provide a kind of unmanned plane flight control shielding cabin of strong electromagnetic interference resistance, including protective shell and heat sink, the inside of protective shell is embedded with anti-electromagnetic interference ware, the bottom of protective shell is provided with heat dissipation component, the top of protective shell is provided with reserved slot;Reserved slot top is fixed in cover plate by bolt, the inboard of reserved slot and the bottom of cover plate are provided with conductive coating, sponge pad is glued in the side of conductive coating, metal mesh is provided between sponge pad and conductive coating.The utility model constructs faraday cage structure by conductive coating and metal mesh, can resist high-strength electromagnetic interference, can ensure the transmission of signal by anti-electromagnetic interference ware to immunity signal electromagnetic interference, can carry out heat dissipation to unmanned plane flight control ware by the setting of heat dissipation component.

The application discloses a portable full-shielding mobile phone safety box, and belongs to the technical field of electronic product safety protection and wireless electromagnetic regulation and control. The product adopts a three-layer composite sealing shell, a closed metal shielding layer in the three-layer composite sealing shell constitutes a Faraday cage shielding cavity, and is matched with a theftproof locking mechanism and a line electromagnetic isolation type charging assembly. The box body is closed and can block radio frequency signals in and out of the box body in full frequency bands. Night use can completely eliminate privacy leakage, remote wake-up, positioning tracking and health hazards caused by mobile phone signal interaction, can resist NFC theft and external equipment monitoring and detection, and is suitable for secret and special emergency environment stealth protection. The charging circuit is integrated with at least two levels of electromagnetic isolation structures, completely blocks power line noise and radio frequency coupling interference brought by an external power line, realizes pure direct current safe charging in a full-shielding closed environment, and starts the built-in active gain antenna after the box body is opened, amplifies mobile phone communication signals, and improves weak network use experience. The overall structure is simple and easy to mass produce and popularize.