170results about How to "Improve electromagnetic compatibility" patented technology

The invention discloses a command vehicle rack-mounted power supply management system, and the system comprises a power supply filtering module which carries out the filtering of power supply input, and removes the high-frequency electromagnetic interference possibly carried by a power line; the electromagnetic shielding module is used for shielding electromagnetic radiation inside and outside the system; the grounding management module is used for providing a unified grounding point of the system and ensuring that all electrical connections have the same potential so as to reduce electromagnetic interference generated by the difference of the grounding point; the signal transmission optimization module is used for ensuring that signal transmission channels inside and outside the system are not influenced by electromagnetic interference; the electromagnetic interference suppression module is used for suppressing transient high-frequency interference generated in the system; and the environment monitoring and feedback module is used for monitoring electromagnetic environments inside and outside the rack in real time and automatically adjusting an EMC protection strategy of the system according to monitoring data so as to adapt to different working conditions. The command vehicle can adapt to a complex electromagnetic environment and ensure stable operation of equipment in the command vehicle.

The utility model discloses a PCB structure for improving a clock signal backflow path, which comprises a PCB body, the PCB body comprises a surface wiring layer and a plurality of internal wiring layers which are arranged from top to bottom, the surface wiring layer is provided with a clock signal layer changing hole and GND backflow holes distributed at two sides of the clock signal layer changing hole, and the GND backflow holes are communicated with the internal wiring layers. The center distance between the GND backflow hole and the clock signal layer change hole is smaller than or equal to 3 mm. According to the design, the backflow path of the clock signal is obviously optimized, so that the stable backflow path of the clock signal in the transmission process can be ensured, attenuation and distortion of the clock signal can be reduced, the stability and accuracy of the clock signal can be improved, and the GND backflow hole not only provides the stable backflow path, but also improves the reliability of the clock signal. And electromagnetic radiation generated in the clock signal transmission process is effectively absorbed through the metal grounding property, so that interference to other circuits and systems is reduced.

The invention proposes a circuit breaker power module layout optimization method and system based on multi-chip current sharing, and relates to the technical field of power electronics, and the method comprises the steps: collecting parasitic parameters of a circuit breaker power module, and constructing a first switch transient circuit model according to the parasitic parameters; constructing a conduction transient process circuit based on the first switch transient circuit model and the conduction transient characteristics; performing current equalization on the conducted transient process circuit according to the common-source inductance compensation function so as to perform state updating on the conducted transient process circuit, and obtaining a second switch transient circuit model corresponding to the conducted transient process circuit after state updating; extracting a parasitic inductance parameter in the second switch transient circuit model by adopting an ANSYS Q3D simulation tool, and performing multiple iterative optimization on the copper layer shape and the copper layer size of each power tube in the second switch transient circuit model through finite element simulation according to the common-source inductance compensation function and the parasitic inductance parameter; and obtaining an optimized layout scheme of the circuit breaker power module. According to the invention, the problem of local overload caused by non-uniform current distribution can be avoided, and the current sharing degree of the device under the condition that multiple chips are connected in parallel can be improved.

The invention provides a motor and application, and the motor comprises a first housing which is provided with a main control circuit board; the second shell is positioned in the first shell and is provided with a driving circuit board and a motor body; wherein the driving circuit board is electrically connected with the main control circuit board and the motor body, the main control circuit board is used for outputting a control signal to the driving circuit board, and the driving circuit board is used for outputting a driving signal to the motor body based on the received control signal; wherein the driving circuit board is located at the end of the motor body, the driving circuit board is provided with two opposite surfaces, one surface is provided with a driving circuit, the other surface is provided with a sensing element, and the driving circuit is electrically connected with a main control circuit of the main control circuit board and the motor body. The sensing element is used for detecting the position of the motor body and outputting a detection signal to the driving circuit. The stability and reliability of the motor are improved.

The invention discloses a high-efficiency converter for adjusting the voltage of a power grid, and belongs to the technical field of power electronics. The converter comprises a first voltage regulation circuit, a second voltage regulation circuit, a filter circuit, a detection circuit and a control circuit. By detecting the amplitude difference between the power grid voltage and the load voltage, the control circuit automatically switches the Buck working mode or the Boost working mode, and stable alternating current output in a wide input voltage range is achieved. The invention has the advantages of compact structure, high efficiency, fast response, small harmonic wave and the like, and is suitable for industrial and civil occasions with large-range fluctuation and frequent power grid voltage.

The invention relates to the field of motors, and provides an integrated permanent magnet synchronous motor which comprises a motor body, a controller, a controller shell, a pi-shaped filter and a common mode filter, the controller shell is detachably connected with the motor body, and the controller, the pi-shaped filter and the common mode filter are all arranged in the controller shell. And the motor body, the pi-shaped filter and the common-mode filter are electrically connected with the controller. The permanent magnet synchronous motor solves the problems that a permanent magnet synchronous motor in the prior art is high in cost, tedious in installation and arrangement and low in integration degree, and achieves the technical effects that the motor body is connected with the controller shell, and then the controller is arranged in the controller shell, so that the motor body and the controller are integrated into a whole; therefore, the reliability of the motor is improved, the space utilization is saved, the maintenance cost is reduced, the efficiency is improved, the flexibility is enhanced, and the electromagnetic interference failure can be effectively avoided by arranging the pi-shaped filter and the common-mode filter.

The invention discloses an electromagnetic interference suppression circuit and method and a power adapter, and belongs to the technical field of power adapters, the electromagnetic interference suppression circuit comprises a common mode inductor, a first end of the common mode inductor is connected to a live wire input end of the power adapter, a second end of the common mode inductor is connected to a null line input end of the power adapter, and the common mode inductor is used for generating magnetic flux; common-mode noise of the live line input end and the zero line input end of the power adapter is suppressed; the differential mode filter is connected with the common mode inductor in parallel and is used for suppressing differential mode noise between the live wire and the zero wire; and the first end of the grounding resistor is connected with the zero line input end of the power adapter, the second end of the grounding resistor is grounded, and the grounding resistor is used for providing a low-impedance path and guiding an electromagnetic interference signal passing through the input end of the power adapter to the ground. Through the combined action of the common mode inductor, the differential mode filter and the grounding resistor, the electromagnetic compatibility of the power adapter can be effectively improved, and the electromagnetic interference is reduced.

The invention discloses a PCB layout design method and system based on heat dissipation optimization, and the method comprises the steps: carrying out the logic design and electrical performance analysis of a to-be-optimized PCB, and obtaining a preliminarily optimized PCB; performing simulation analysis on the preliminarily optimized PCB to obtain an optimization analysis result of the PCB; performing wiring optimization and multilayer board optimization on the preliminarily optimized PCB according to an optimization analysis result of the PCB to obtain an optimized PCB; and performing verification analysis on the optimized PCB according to an electrical design rule to obtain a final optimized PCB. According to the embodiment of the invention, the electromagnetic interference can be reduced, the electromagnetic compatibility and the heat dissipation capability of the circuit are improved, and the stable transmission of signals is realized. The method can be widely applied to the technical field of electronic circuit layout design.

The utility model belongs to the technical field of motor controllers, and provides a high-voltage port filtering device, a motor controller and an electric driving system, and the high-voltage port filtering device comprises a first busbar, a second busbar and a magnetic ring structural member. The first busbar and the second busbar are arranged side by side, and the large side surface of the first busbar and the large side surface of the second busbar are oppositely arranged; the magnetic ring structural member is provided with a first via hole for the first busbar to pass through, a second via hole for the second busbar to pass through and a partition air gap, and the partition air gap is respectively communicated with the first via hole and the second via hole. According to the scheme, common-mode noise suppression and differential-mode noise suppression can be realized on the magnetic ring structural member, so that the electromagnetic compatibility of the filtering device is improved, the application number of corresponding capacitors is reduced, and the application cost is further reduced.

The present invention provides a flexible sheet of broadband wave-absorbing metamaterial based on carbon-based materials. The sheet comprises a reflective layer and a dielectric layer embedded with periodically arranged structural units. The dielectric layer is arranged above the reflective layer. The preparation of the sheet comprises the following steps: the dielectric layer is arranged according to the size of the periodic resonant structural unit, and every other unit cell is arranged. P The size of the double-layer concentric cylindrical hole is mechanically punched; the small hole side of the medium plate with the hole is cleaned with anhydrous ethanol, and the reflective layer is applied; the graphene or carbon nanotubes are mixed with the adhesive to form a carbon composite for use; the graphene or carbon nanotubes are filled into the periodically arranged holes in step 1 with a scraper; the carbon composite is dried naturally until it is completely dry. The flexible sheet of this patent achieves a wide-band wave absorption effect in the range of 2 to 18 GHz, has a simple manufacturing process, is easy to use, can be applied to the object to be measured, and effectively reduces the characteristic signal of the radar wave of the target object.

The utility model discloses a double-shielding high transmission data cable, including: insulating core wire, buffer hose, aluminum plastic composite tape, ground wire, metal braid layer and sheath, insulating core wire is formed by three insulating layer co-extrusion on the conductor, every two insulating core wire pair twist to form one group of twisted pair wire, each group of twisted pair wire is lapped with aluminum plastic composite tape, the metal braid layer is lapped with the buffer hose, the metal braid layer is lapped with the metal braid layer, the metal braid layer is lapped with the metal braid layer, and the metal braid layer is lapped with the metal braid layer. The four groups of twisted pair wires are twisted into a cable by taking the ground wire as a center, a metal braided layer is braided on the four groups of twisted pair wires which form the cable, an aluminum foil layer on an aluminum-plastic composite belt is in contact with the metal braided layer and the ground wire, a buffer hose is spirally wound on the metal braided layer at equal intervals, and the buffer hose is formed by mixing and extruding a PVC material and aluminum hydroxide particles. And a sheath is extruded on the metal braid layer, is filled in the gap of the buffer hose and is attached to the metal braid layer. The advantages of the utility model are that the cable can maintain the high-speed and high-reliability transmission performance of data signals in a conventional environment and an environment in which a fire disaster occurs or a building collapses.

The invention relates to the technical field of motor control, in particular to a brushless motor electronic speed regulation circuit for an unmanned aerial vehicle and a control method of the brushless motor electronic speed regulation circuit. The brushless motor electronic speed regulation circuit comprises a printed circuit board, a power supply module and a grid driving module. The printed circuit board is provided with a plurality of wiring layers which are stacked, and comprises a first power supply layer and a second power supply layer which are adjacent to each other in the vertical direction and are overlapped and aligned, and an electrical control layer. The power supply module is arranged on the first power supply layer and the second power supply layer, the first power supply layer and the second power supply layer are electrically connected through a matrix via hole array, and the power supply module is used for being electrically connected with an external power supply and supplying power to a circuit after processing. The grid driving module is arranged on the electrical control layer, is powered by the power supply module and is used for outputting driving voltage to the brushless motor, large current transmission and balanced distribution of the multi-channel motor controller can be realized on a single printed circuit board, and electromagnetic interference of a power loop on a control signal is inhibited.

The utility model discloses a new energy automobile copper clad aluminum braided shield high voltage cable in the technical field of high voltage cable, including stranded copper conductor, the fixed extrusion of insulating layer has on the outer wall of stranded copper conductor, the insulating layer is cross -linked polyethylene or cross -linked polyolefin insulating layer, the insulating layer outside fixedly set semiconductive inner layer, fill in the PP filling strip between semiconductive inner layer with insulating layer, the outer wall of semiconductive layer extrudes and has copper clad aluminum braided shield layer, copper clad aluminum braided shield layer is 0.1~0.2 tinned copper clad aluminum wire, and with semiconductive inner layer is 360 degree ring pressure contact, the outer wall of copper clad aluminum braided shield layer fixed extrusion has aluminum foil layer, the outer wall of aluminum foil layer fixed extrusion has semiconductive outer layer, the outer wall of semiconductive outer layer fixed extrusion has cross -linked polyolefin sheath, the utility model discloses can reduce the shielding layer direct current resistance, guarantees the continuity of grounding, promotes high -frequency shielding efficiency, strengthens in 100kHz~30MHz frequency band shielding attenuation.

The invention discloses an LVDS (Low Voltage Differential Signaling) receiving circuit with a wide common-mode input range. The LVDS receiving circuit comprises a common-mode conversion circuit, a main comparator circuit, a secondary comparison circuit and a logical judgment circuit, the common-mode conversion circuit is used for converting an external wide common-mode input differential signal into a signal with constant common-mode voltage and no attenuation of the differential signal; the main comparator circuit identifies the converted differential signal to complete differential-to-single-ended data conversion; the secondary comparator circuit is composed of two low-speed comparators; and the logic judgment circuit judges the output of the main comparator and the window comparator to ensure that the output of the input end of the circuit group is a constant level under the short circuit and disconnection conditions, so that the function of dynamic failure protection of the circuit is realized. The wide common-mode input circuit can realize discrimination of wide common-mode input signals ranging from-4V to 5V, and has a dynamic failure protection function.

An electronic cigarette radio frequency source device comprises a radio frequency function board and a shielding isolation frame fixedly connected to the radio frequency function board. The system function board is fixedly connected to the shielding isolation frame and located on the side, away from the radio frequency function board, of the shielding isolation frame; wherein an accommodating space is formed among the radio frequency function board, the shielding isolation frame and the system function board, a shielding partition plate group is integrally formed on the shielding isolation frame, and the accommodating space is divided by the shielding partition plate group. The accommodating space is divided by the shielding partition plate group, and the accommodating space in the device is divided into a plurality of areas, so that the areas in the accommodating space can effectively avoid mutual electromagnetic interference. The design that the radio frequency function board is located on the side, away from the system function board, of the shielding isolation frame, the containing space is formed among the radio frequency function board, the shielding isolation frame and the system function board, and radio frequency radiation is sealed in the containing space is adopted, so that the electromagnetic compatibility between a circuit on the radio frequency function board and a circuit on the system function board is improved.

The utility model discloses a control system for an aviation device, and belongs to the technical field of aviation weapon control. The control system comprises a power supply control module, an SOC module, a configuration Flash, an EMMC memory, a crystal oscillator, a JTAG, a peripheral component and an external connector. An ARM processor and an FPGA are integrated in the SOC module, and a hard core processor is arranged in the ARM processor and used for executing software tasks. A soft core microprocessor and IP cores are arranged in the FPGA, the IP cores are connected with peripheral components correspondingly controlled by the IP cores one by one, and under the support of the IP cores and the peripheral components corresponding to the IP cores, transceiving control over the interfaces is achieved; the configuration Flash is used for storing a configuration file and serial loading software of the SOC module; the EMMC memory is used for storing software and data; the crystal oscillator is used for providing a clock required by the work of the SOC module; and the JTAG is used for downloading the configuration file of the SOC module to the configuration Flash. The control system provided by the utility model has strong electromagnetic compatibility, can be used in a complex electromagnetic environment, and improves the operation speed and the product reliability through the optimization of the SOC module.

The invention relates to a conductive and electromagnetically shielding polyaryletherketone-based composite material and a preparation method thereof, comprising the following steps: S1, forming a mixed dispersion of a carbon-based MFI structure molecular sieve and a metal salt, and performing a heating reaction to obtain a loaded carbon-based MFI structure molecular sieve; S2, uniformly mixing the loaded carbon-based MFI structure molecular sieve and polyaryletherketone, and then performing melt blending, extrusion, and granulation to obtain a first material; S3, uniformly mixing a conductive filler and polyaryletherketone, and then performing melt blending, extrusion, and granulation to obtain a second material; S4, mixing the first material and the second material according to a proportion, and then performing melt blending, extrusion molding or granulation to obtain a conductive and electromagnetically shielding polyaryletherketone-based composite material; the composite material of the invention has significant electromagnetic shielding effectiveness and excellent comprehensive mechanical properties.

This application discloses a circuit board integrated within the rear cover of a motor, applicable to the field of electronic circuits. This circuit board integrates an electromagnetic compatibility (EMC) suppression circuit and a Hall sensor signal feedback circuit with memory function. The EMC suppression circuit, used to suppress electromagnetic interference from the motor, includes an EMC filter, a transient voltage suppression diode, a first filter capacitor, a second filter capacitor, and the motor itself. The Hall sensor signal feedback circuit includes a Hall sensor, a third filter capacitor, and a pull-up resistor. The Hall sensor is a bipolar latching type, used to output speed and position feedback signals based on the magnetic field of a bipolar magnetic ring mounted on the motor rotor. Thus, through the coordinated operation of the EMC filter, the transient voltage suppression diode, and multiple filter capacitors, the EMC of the motor is improved.

The utility model discloses an LLC magnetic integrated transformer, and aims to improve the integration level, the performance and the reliability. The transformer comprises a winding support, an upper magnetic core and a lower magnetic core which are symmetrically arranged, and a placing magnetic core fixed in a through hole of the winding support. The through hole is divided into a first containing groove and a second containing groove, the magnetic core is placed in the first containing groove, and the side edge protruding columns of the upper magnetic core and the lower magnetic core are arranged in the second containing groove. And a first air gap and a second air gap are respectively arranged between the magnetic core and the side edge convex columns and between the side edge convex columns and are used for adjusting magnetic resistance and optimizing performance.

The present invention proposes a low-frequency power suppression method and system based on power module topology; obtain the first transfer function of electromagnetic coupling between the power decoupling branch and the main power circuit, obtain the target path and target coupling strength of electromagnetic coupling between the power decoupling branch and the main power circuit through simulation analysis, and the transfer characteristics and influence degree of electromagnetic interference between the power decoupling branch and the main power circuit, and construct a filter circuit for suppressing electromagnetic interference to adjust and optimize the circuit layout and wiring of the power decoupling branch and the main power circuit, and adjust the device parameters until the optimized circuit topology meets the preset power suppression requirements. The present invention solves the problem that the parameters such as parasitic inductance and capacitance in the circuit design of the prior art are difficult to control, and the interference of the coupling effect on the circuit cannot be effectively controlled, resulting in poor circuit stability. The present invention effectively reduces the electromagnetic coupling interference between the power decoupling branch and the main power circuit, and improves the electromagnetic compatibility performance of the power module.

A radio frequency antenna installed in an ultra-high vacuum chamber includes an upper and lower interface flange module, a connecting straight wire module, and an open multi-segment quasi-circular arc antenna module. The upper and lower interface flange modules are used to ensure vacuum sealing; the connecting straight wire module is used to transmit excitation signals and impedance matching; the open multi-segment quasi-circular arc antenna module is used to provide three-segment elliptical arc antennas with an eccentricity of approximately 1. The entire antenna has an ultra-wide impedance bandwidth from DC to 127MHz, and can radiate an effective radio frequency signal with a polarization degree of 0.9987 and a signal strength of 53.6mG in the atomic interaction region under a low feed power of 3W. The present invention can not only reduce the radio frequency power demand by 90%, but also maintain the system vacuum degree better than 2.1×10 ‑8 Pa, and has good electromagnetic compatibility. The present invention is applied to a space ultracold atomic physics experimental device, and can provide a radio frequency antenna installed in an ultrahigh vacuum chamber for experiments of radio frequency induced evaporative cooling and radio frequency state preparation.

The invention relates to a partial discharge fault detection method and device based on an optical microdisk, and belongs to the technical field of fault detection. Comprises: emitting a laser signal; adjusting the intensity of the laser signal to obtain an adaptive laser signal; coupling an optical signal with a specific wavelength in the adaptive laser signal to form a stably existing standing wave, and obtaining a first optical signal; converting the first optical signal into an electric signal, and performing phase-sensitive demodulation on the electric signal to obtain position information of the sound signal; and identifying and positioning the partial discharge signal according to the position information. According to the invention, real-time online detection is realized, the detection efficiency is obviously improved, electromagnetic interference resistance is realized, the dependence on processing of a large amount of information is reduced, and the data processing time is shortened.

The invention discloses an all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive manufacturing. The all-quartz multi-component Raman signal online detection module comprises a node-free negative curvature hollow-core optical fiber with side micropores, a multimode optical fiber, a single-mode optical fiber plated with a ceramic film, a semicircular micro-channel, a quartz slurry packaging layer and a quartz fixing base, a micro-scale micropore is processed on the side surface of a node-free negative-curvature hollow fiber by utilizing picosecond laser, a multimode fiber, the node-free negative-curvature hollow fiber with the side micropore and a single-mode fiber are welded into a whole, the single-mode fiber is ground into a slice by utilizing an optical fiber grinding technology, and a ceramic membrane is deposited on the end surface of the slice single-mode fiber. Picosecond laser is used for scanning the quartz fixing base layer by layer so as to process a semicircular micro-channel for placing the sensor, and CO2 laser is used for scanning, depositing and curing the quartz slurry packaging layer layer by layer so as to package the sensor. According to the invention, the to-be-detected substance is injected into the all-quartz sensor, so that on-line detection of multi-component Raman signals can be realized in high electromagnetic interference environments such as electric power and the like.

The utility model discloses a printed circuit board, a communication device and a vehicle. The printed circuit board comprises a dielectric related interface, an electrostatic impedor, a common-mode resistor, an alternating-current coupling capacitor, a common-mode filter and a control chip, and a differential signal line is connected to the control chip through the electrostatic impedor, the common-mode resistor, the alternating-current coupling capacitor and the common-mode filter in sequence; wherein the differential signal lines are arranged based on a cross-layer reference mode; wiring of the positive signal line and the negative signal line of the differential signal line, pin bonding pads on wiring paths and via holes in the wiring paths are all symmetrically arranged, and the positive signal line and the negative signal line are matched in equal length. Through the symmetrical arrangement and equal-length matching of the differential signal lines and the use of the electrostatic impedor, the common-mode resistor, the alternating-current coupling capacitor, the common-mode filter and other elements, noise and interference are effectively suppressed, and the integrity of signals is improved. The cross-layer reference and the reasonable wiring strategy help to reduce electromagnetic radiation and sensitivity, and improve the electromagnetic compatibility of the printed circuit board.

The utility model discloses a multifunctional electric power meter, which comprises a shell and a circuit system, the circuit system comprises a controller, a sampling module, a liquid crystal display module, a storage module, a key module, an input module, an output module and a wireless communication module, a wireless network module adopts a BC26 network module, and the BC26 network module is connected with an SIM (Subscriber Identity Module) card module. According to the utility model, the wireless network technology is adopted to realize wireless remote communication, state information such as circuit breaker position signals and knife switch position signals of the electrical instrument is detected through a photoelectric coupler of the output and output module, and whether related electrical parameters are out of limit or not is monitored in cooperation with the use of constant value system alarm of the instrument. The wireless and intelligent electrical instrument is realized; by adopting the NB-IoT technology, the system has the characteristics of wide coverage, low power consumption, low cost, massive connection and high security.

The invention discloses a low leakage switch, and belongs to the technical field of switches, the low leakage switch comprises a commercial power supply switch and a hybrid power supply switch, the commercial power supply switch and the hybrid power supply switch carry out information interaction through an optical fiber, the commercial power supply switch comprises a commercial device, and the hybrid power supply switch comprises a commercial device and a storage battery. The commercial power supply switch and the hybrid power supply switch enable the low-leakage switch to form a split structure, the commercial power supply switch and the hybrid power supply switch carry out information interaction through optical fibers, communication signals are transmitted in an optical signal mode, electric signals are not generated, radiation is not generated, and the reliability of the low-leakage switch is improved. Interference is caused to a darkroom environment or a special environment with extremely strict requirements for electromagnetic waves and conducted noise, meanwhile, the hybrid power supply switch adopts a built-in storage battery to supply power, and when the hybrid power supply switch is placed in the darkroom or the special environment, an active power supply is not introduced, so that interference caused by conduction and emission from an external power line is avoided.

The embodiment of the invention provides a control method of a voltage converter and an energy storage system. The method comprises the following steps: a controller obtains accumulated required power of any control period; the controller judges whether the accumulated required power is greater than or equal to a set sending power threshold value; if the controller judges that the accumulated required power is greater than or equal to a sending power threshold value, the controller sets the output power as the accumulated required power; if the controller judges that the accumulated required power is smaller than the sending power threshold value, the controller sets the output power as a set value, and the set value is smaller than the sending power threshold value; the controller controls whether the voltage converter works or not according to the output power. According to the embodiment of the invention, the stability of power supply is improved, and the electronic equipment connected to the energy storage inverter is protected; generation of electromagnetic interference is reduced, and electromagnetic compatibility of the system is improved.

The present application relates to a kind of sCMOS image sensor multi-species signal cross vacuum integration transmission method, comprising: preparation four-layer high-speed vacuum compression flexible circuit board, it includes control signal layer, power loop layer, segmented power layer, high-speed LVDS image data transmission layer from top to bottom;A slit is opened on the bottom disc of vacuum closed cavity, and the middle section of four-layer high-speed vacuum compression flexible circuit board is sealed between the slit and the slit and is penetrated;sCMOS image sensor is connected with the front section of four-layer high-speed vacuum compression flexible circuit board;High-speed high-density rectangular connector is connected with the rear section of four-layer high-speed vacuum compression flexible circuit board;The upper cover of vacuum closed cavity is fixed and sealed with the bottom disc under vacuum condition.This application can ensure the long-term reliability of vacuum cavity, reduce the number of potential leakage points, while having small volume, high space utilization, multi-signal high-quality transmission, simple structure, high reliability, low maintenance and upgrading cost and other advantages.

The utility model discloses a Hall sensor circuit for cabinet door state detection, and belongs to the field of sensor circuits. Comprising a Hall sensor module, a filtering module, a voltage protection module, a current limiting module, a state indication module and a signal output interface module. The Hall sensor module is used for sensing a magnetic field signal generated by the position change of the cabinet door and outputting a corresponding level signal; the filtering module is composed of a pi-type filtering circuit composed of a capacitor and an inductor and is used for suppressing high-frequency interference of a power supply and improving power supply stability. The voltage protection module adopts a transient voltage suppression diode to realize input surge suppression; the current limiting module is composed of a plurality of resistors and is used for limiting output current and realizing signal level voltage division conditioning; the state indication module indicates the state of the cabinet door in real time through a light-emitting diode; and the signal output interface module is used for transmitting the processed signal to a control system. The circuit has the advantages of simple structure, strong anti-interference capability, high adaptability and good detection reliability.

The utility model discloses a switch cabinet safe operation monitoring device which comprises a partial discharge monitoring device, a high-voltage live-line sensor and a wireless temperature sensor, a high-voltage live-line loop is in wired connection with the high-voltage live-line sensor, the high-voltage live-line sensor is in wired connection with the partial discharge monitoring device, and the wireless temperature sensor is in wired connection with the partial discharge monitoring device. The temperature sensor is in wireless connection with the partial discharge monitoring device, collected data can be read and stored on site and uploaded to a control background through an RS485 interface in a Modbus communication mode, the functions of real-time detection, query, statistics and the like are provided, field debugging and calibration can be carried out through a USB interface, and the real-time monitoring of the partial discharge monitoring device is realized. The partial discharge live inspection and atlas analysis device has the characteristics of modular design, simple design and production process, interference resistance, photoelectric and electromagnetic isolation, convenience in installation, long service life, excellent environmental endurance capability and electromagnetic compatibility, and long-term safe and reliable operation.