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42results about How to "Solving Electromagnetic Compatibility Issues" patented technology
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Battery monomer voltage measuring circuit and compensation method for measuring error thereof
InactiveCN101876670ASolving Electromagnetic Compatibility IssuesSolve insulation problemsCurrent/voltage measurementElectrical testingObservational errorMicrocontroller
The invention relates to a battery monomer voltage measuring circuit and a compensation method for measuring error thereof, and belongs to the technical field of power of electromobiles. The circuit comprises a high voltage gating circuit, a high common-mode measuring circuit, an isolation amplifying circuit, an absolute value circuit, a singlechip digital core circuit, a communication circuit and a power circuit. The compensation method for measuring error comprises the following steps: analyzing the measuring error, and obtaining a modifier formula for the monomer voltage measurement. Aiming at the characteristics of a great number of voltage monomers, gradual accumulated potential and high absolute potential in the battery, the high-voltage part and the lower-voltage part are separately arranged, thereby solving the problems of electromagnetic compatibility and high-voltage insulation in the high-density multichannel monomer voltage measurement. The monomer voltage measuring circuit has the advantages of high precision, high reliability, small size and low measurement cost per monomer. The error correction method can be used for acquiring high-precision battery voltage measurement results (the error is less than 10 mV), and is applicable to monomer voltage on-line precision measurement of power batteries for electromobiles.
Owner:TSINGHUA UNIV
Game-theory-based spectrum allocation method, communication equipment and system
InactiveCN102307351AEfficient use ofSmall electromagnetic interferenceNetwork planningFrequency spectrumElectromagnetic interference
The embodiment of the invention discloses a game-theory-based spectrum allocation method, communication equipment and a game-theory-based spectrum allocation system. The method mainly comprises that: a first user in a cognitive radio cell performs probability calculation on spectrum resources by utilizing a Bernoulli test, and judges whether a communication channel in the spectrum resources is occupied by the first user or not; if the communication channel is occupied by the first user, the first user calculates interference values Io generated on all available communication channels by the first user; after receiving the interference values Io, a receiver of a second user in the cognitive radio cell calculates interference values Id of users except the second user for the second user, and calculates a utility function U1 on each channel in the spectrum resources; and the second user extracts a communication channel corresponding to a value of the utility function U1 according to the value of the utility function U1 as the communication channel of the second user. The embodiment of the invention reduces electromagnetic interference among user equipment, and more effectively utilizes the spectrum resources.
Owner:SUN YAT SEN UNIV
Isolation type power driving circuit
InactiveCN101520012ASimple structureReliable functionElectrical controlMachines/enginesElectromagnetic compatibilityCurrent limiting
The invention belongs to the technical field of electronic control of engines and in particular relates to an isolation type power driving circuit which comprises power driving with photoelectric isolation, failure feedback with photoelectric isolation, an isolation driving and protective circuit and an isolation failure diagnosis circuit. An output protective signal drives a relay through a photoelectric apparatus 1 to supply power to an electromagnet and cuts off the power supply for the electromagnet when failure occurs; a power driving signal drives an MOS tube through a photoelectric apparatus 2 and a current-limiting resistor 1 and provides different average driving current for the electromagnet through controlling the connection and the disconnection of the MOS tube; high-level and low-level signals at the upper end of the MOS tube drive a photoelectric apparatus 3 through the feedback of a current-limiting resistor 2; a signal after the photoelectric apparatus 3 and a power driving signal form a failure distinguish logic through a J trigger and a K trigger to output a low-level signal or a high-level signal. The invention has simple structure and reliable function and effectively solves the difficult problems of electromagnetic compatibility and isolation high-power driving of an engine electric control system.
Owner:CHINA NORTH IND GRP NO 70 RES INST
LED light panel, scanning card and their combined structure as well as LED display screen control system
The invention relates to an LED light panel, scanning card and their combined structure as well as LED display screen control system. The combined structure comprises the LED light panel and the scanning card. The LED light panel comprises a first circuit board, an LED display driving circuit, a signal driving chip, a network transformer and a network port. The first circuit board is provided with a scanning card welding zone. The LED display driving circuit, the signal driving chip, the network transformer and the network port are arranged on the first circuit board. The network transformer is electrically connected between the scanning card welding zone and the network port. The signal driving chip is electrically connected between the LED display driving circuit and the scanning card welding zone. The scanning card is electrically connected to the scanning card welding zone of the first circuit board. According to the invention, complicated and redundant wiring is not required for connections between a scanning card and an LED light panel as well as between the LED light panels in the prior art, therefore, overcoming the shortcomings in wirings.
Owner:XIAN NOVASTAR TECH
SAR and wireless communication integrated system and implementation method thereof
ActiveCN105306130AReduce constraintsReduce consumptionRadio transmissionHigh level techniquesComputer modulePhase array antenna
The invention relates to an SAR and wireless communication integrated system. An output end of an FPGA controller is connected with an input end of a D / A converter, the output end of the D / A converter is connected with the input end of an analog transmission channel, the output end of the analog transmission channel is connected with the input end of an A / D converter, the output end of the A / D converter is connected with the input end of the FPGA controller, a circulator is in two-way communication with a phased-array antenna, and the FPGA controller is in two-way communication with a digital beam forming module. The invention further discloses an implementation method of the SAR and wireless communication integrated system. The SAR and wireless communication integrated system provided by the invention achieves a broadband wireless mobile communication function, not only reduces the requirements on the volume and weight of the equipment, but also reduces the energy consumption and avoids the problem of complex electromagnetic compatibility to a certain extent.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Assembled single-phase reactor
ActiveCN102360721AStable performanceStrong insulation and heat resistanceTransformers/inductances coils/windings/connectionsInductances/transformers/magnets manufactureElectromagnetic compatibilitySingle phase
The invention discloses an assembled single-phase reactor. A shell of a magnetic pot is formed by assembling two semicircular base plates positioned at two ends and a plurality of magnetic ring housings positioned between the two semicircular base plates; the shell of the magnetic pot and magnetic columns which are positioned in the magnetic ring housings and magnetically communicated with the two semicircular base plates together form an assembled magnetic pot; the magnetic columns are a plurality of series assembly structures; the shell of the magnetic pot and the magnetic columns are fixed with each other through passed bolts; one or two gaps for leading out wires is or are formed in the plurality of magnetic ring housings; foil winding coils are wound outside the magnetic columns; and a filling material is filled in a space in the pot body. By the assembled single-phase reactor, the technical problems that the conventional single-phase reactor product made of soft magnetic powder metallurgy materials and foil winding coils is low in electromagnetic compatibility and high in magnetic flux leakage, cannot change the capacity and the technical characteristic of the product conveniently, and the like can be solved.
Owner:BEIJING IN POWER ELECTRIC +1
Satellite-borne tripe-frequency beacon and working method thereof
PendingCN111443245AOvercoming Electromagnetic Compatibility IssuesAddressing In-Band Interference IssuesSatellite radio beaconingElectromagentic field characteristicsRadio frequencyTransposer
The invention relates to a satellite-borne tripe-frequency beacon and a working method thereof. The satellite-borne tripe-frequency beacon comprises an emitter, an emission antenna and a radio-frequency connection cable, wherein the radio-frequency connection cable is arranged between the emitter and the emission antenna, the emitter comprises a constant temperature crystal oscillator and a frequency source unit, the frequency source unit is electrically connected with the constant temperature crystal oscillator, coherent signals, generated by the frequency source unit, at VHF, UHF and L bandsare orthogonalized by a bridge and then synthesized and amplified by a power amplifier to output an I / Q signal, a lower computer management circuit for controlling each part in the emitter to work communicates with a satellite service through a CAN bus, and a power unit supplies power to each part in the emitter. With the satellite-borne tripe-frequency beacon disclosed by the invention, three coherent signals at the VHF, UHF and L bands can be initially and simultaneously emitted, the problem of electromagnetic compatibility of the tripe-frequency beacon and a GNSS occultation receiver is solved, the problem of in-band interference of the GNSS occultation receiver is effectively solved, normal working of the beacon is ensured, and meanwhile, normal working of the GNSS occultation receiver is not affected.
Owner:中国电波传播研究所
Electromagnetic compatibility analysis method of radio-frequency module backboard
ActiveCN106053982ASolving Electromagnetic Compatibility IssuesImprove design efficiencyMeasuring interference from external sourcesCross correlation matrixSource function
The invention relates to an electromagnetic compatibility analysis method of a radio-frequency module backboard. A prediction equation is established to determine an electromagnetic interference between an interference port and a sensitive port of the backboard, a source function and a transmission function are combined together, effective power at the sensitive port of the backboard is obtained, and then the obtained effective power is compared with a sensitivity threshold so that whether a latent electromagnetic interference exists is determined; if the effective power generated by the interference port at the sensitive port is less than the sensitivity threshold of a device, an electromagnetic compatibility state exists, otherwise, an interference problem exists; and a cross-correlation matrix is built through design for an S parameter between the various ports in a simulation backboard then, cross correlation, i.e., the relationship coupling degree, between the ports of the backboard is analyzed, interference conditions of various modules on the backboard at different working frequencies are determined, and then convenience is provided for subsequent targeted electromagnetic compatibility design. The electromagnetic compatibility analysis method is targeted; and electromagnetic compatibility analysis method is advantageous in that a design period is shortened, electromagnetic compatibility design efficiency is improved, and time cost is greatly saved.
Owner:BEIHANG UNIV
Double-phase zero-crossing signal detection circuit and optical fiber signal transmission system
ActiveCN108872695ASimple structureLow costCurrent/voltage measurementElectromagnetic transceiversMicrocontrollerFiber
The invention discloses a double-phase zero-crossing signal detection circuit required by a bidirectional spark ignition circuit, and an optical fiber signal transmission system. The detection circuitcomprises an input RC filter circuit, a positive and negative half-cycle zero-crossing signal detection and pulse driving circuit, and a positive and negative half-cycle zero-crossing detection pulsefiber transmitter and receiver. One end of the positive and negative half-cycle zero-crossing signal detection and pulse driving circuit is connected with a power frequency alternating current through the input RC filter circuit, and the other end is connected with the positive and negative half-cycle zero-crossing detection pulse fiber transmitter. The positive and negative half-cycle zero-crossing detection pulse fiber transmitter transmits a zero-crossing detection pulse to the positive and negative half-cycle zero-crossing detection pulse fiber receiver, and finally transmits the zero-crossing detection pulse to a single-chip microcomputer. The circuit can simultaneously meet the requirements of the AC zero-crossing signal detection, the AC electrode polarity detection and the high-speed fiber pulse signal transmission, is simple in circuit principle, and is easy to manufacture and debug.
Owner:广东中科谛听科技有限公司
Device for detecting intervertebral disc pressure
InactiveCN102631203ASuitable for Surgical EnvironmentSolving Electromagnetic Compatibility IssuesMuscle exercising devicesElectrical resistance and conductanceElectricity
The invention relates to a device for detecting intervertebral disc pressure, comprising a plurality of resistance strain gauges (1) which are stuck to the detected position of the surface of intervertebral disc and used for detecting signals and a stress detection transmitter (2) which is electrically connected with the resistance strain gauges (1), wherein the stress detection transmitter (2) comprises inner bridge units, operation amplifier units, analog-to-digital conversion units and wireless transmission modules which are successively electrically connected; the inner bridge units and the corresponding resistance strange gauges (1) constitute bridges; the resistance strain gauges (1), the inner bridge units, the operation amplifiers and the analog-to-digital conversion units have the same number and correspond with one another. The device further comprises an upper computer which is in wireless communication with the stress detection transmitter (2). The device can realize trauma-free direct nondestructive test or measurement of pressure of intervertebral disc.
Owner:RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
Vehicle-mounted multi-frequency integrated antenna device
ActiveCN103545596AIncreased directional variationImprove omnidirectionalityAntenna arraysSimultaneous aerial operationsWave structureThird generation
The invention relates to a vehicle-mounted multi-frequency integrated antenna device. The vehicle-mounted multi-frequency integrated antenna device comprises a 350MHz cluster mobile antenna, an 800MHz cluster mobile antenna, a 3G public mobile communication antenna, an FM antenna, a compass double-mode antenna, a GPS double-mode antenna, a 3G wide-band antenna support, a bottom board, an outer shell, a feeder line and a short circuit. The vehicle-mounted multi-frequency integrated antenna device has the advantages that the electric sizes of the 350MHz cluster mobile antenna and the 800MHz cluster mobile antenna are small, the antenna device combines the advantages of an IFA antenna structure, a reversed-F-shaped short circuit structure is connected into the receiving end of the antenna device so as to change the currents of the antenna device, and the size is reduced. The 350MHz cluster mobile antenna and the 800MHz cluster mobile antenna are of a double-frequency structure, the top of the antenna is modified to be of a slow wave structure by modifying a spiral antenna, the resonance currents change for the second time, and the characteristic of double-frequency operation is achieved.
Owner:THE FIRST RES INST OF MIN OF PUBLIC SECURITY +1
Research method of novel high-efficient power supply equipment for special needs for low-voltage distribution system
InactiveCN101834440AOptimizationImprove power conversion efficiencyReactive power adjustment/elimination/compensationReactive power compensationPower qualitySpecial needs
The invention relates to a research method of novel high-efficient power supply equipment for special needs for a low-voltage distribution system. The research method comprises theoretical analysis and experiment research. Compared with the prior art, the invention has the functional characteristics of high power supply reliability, good power quality of power supply and meeting of a plurality of users and demands and has the advantages of inhibiting harmonic pollution of a power system and resonance of power system parallel compensation equipment, and the like.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Hopping frequency synthesizer
PendingCN108512549AImprove isolationSolve the cooling problemPulse automatic controlControl signalBand-pass filter
The invention provides a hopping frequency synthesizer comprising a cavity in which a channel unit is arranged, wherein a cover plate is arranged on the cavity, and a power supply and control signal interface and a radio frequency signal output interface are outwards arranged on two sides of the cavity; the channel unit is separately connected with the power supply and control signal interface andthe radio frequency signal output interface; an amplification module III, a DDS module and a frequency division module are arranged in the channel unit; a band-pass filter and an amplitude limiting circuit are arranged in the amplification module III; a DDS chip is arranged in the DDS module; and a frequency divider is arranged in the frequency dividing module. The hopping frequency synthesizer provided by the invention adopts a dual-layer shielding structure, each module is embedded into the cavity and covered with the small cover plate, and then covered with a big cover plate, and then dual-layer shielding is formed, so that the heat dissipation effect is improved while the electromagnetic shielding performance and isolation of each module are improved, and the heat dissipation problembetween the printed circuit boards of the modules is effectively solved.
Owner:GUIZHOU AEROSPACE TIANMA ELECTRICAL TECH
Mobile noncontact uninterrupted power supply device
InactiveCN102075017BReduce secondary leakage fieldReduce energy consumptionElectromagnetic wave systemCircuit arrangementsElectromagnetic couplingAlternating current
The invention discloses a mobile noncontact uninterrupted power supply device. A primary winding (11) of the device is laid along a line, and a primary winding fixing bracket (12) is arranged in a certain distance. The power supply device is also provided with a proximity position sensor and a leaving position sensor for sending switch-on or switch-off signals to a secondary switch. The proximity position sensor consists of a proximity signal generator (131) and a proximity signal receiver (281); and the leaving position sensor consists of a leaving signal generator (132) and a leaving signal receiver (282). The proximity signal generator (131) and the leaving signal generator (132) are arranged at two ends of the primary winding fixing bracket (12); and the proximity signal receiver (281) and the leaving signal receiver (282) are arranged at two ends of a secondary winding (20). Electromagnet attraction devices (200) are positioned on two pole plates of a secondary iron core (22). The primary winding (11) passes through a secondary winding (21) and an iron core (22) in a noncontact mode to form an electromagnetic coupling structure; and alternating current is supplied in the primary winding (11).
Owner:TONGJI UNIV +1
Sound control communication positive pressure type fire-fighting air respirator and using method thereof
PendingCN113521579AResolve interferenceSolving Electromagnetic Compatibility IssuesBreathing masksFire rescueCMOSPhysical medicine and rehabilitation
The invention discloses a sound control communication positive pressure type fire-fighting air respirator and a using method thereof. The sound control communication positive pressure type fire-fighting air respirator comprises a supporting assembly, a breathing assembly and a communication assembly, wherein the supporting assembly comprises a back plate, shoulder straps and a waist strap; the breathing assembly comprises a mask and an air bottle, and the mask is fixedly communicated with the air bottle through an air pipe; and the communication assembly comprises a communication controller and an interphone, the communication controller is electrically connected with the interphone through a connecting line. The using method of the sound control communication positive pressure type fire-fighting air respirator comprises the steps of wearing the device, starting the breathing assembly and starting the communication assembly. According to the sound control communication positive pressure type fire-fighting air respirator, the communication controller adopts the sound control PTT technology, normal conversation can be realized without manual operation, and thus the two hands of a user are liberated; and the interference of noise is eliminated by adopting the DSP digital operation processing technology and the CMOS technology, so that a worker can carry out conversation communication with a field partner and a background commander like normal talking.
Owner:长沙丰业泽众安防设备有限公司
Assembled single-phase reactor
ActiveCN102360721BSolving Electromagnetic Compatibility IssuesImprove shielding effectTransformers/inductances coils/windings/connectionsInductances/transformers/magnets manufactureEngineeringConductor Coil
The invention discloses an assembled single-phase reactor. A shell of a magnetic pot is formed by assembling two semicircular base plates positioned at two ends and a plurality of magnetic ring housings positioned between the two semicircular base plates; the shell of the magnetic pot and magnetic columns which are positioned in the magnetic ring housings and magnetically communicated with the two semicircular base plates together form an assembled magnetic pot; the magnetic columns are a plurality of series assembly structures; the shell of the magnetic pot and the magnetic columns are fixed with each other through passed bolts; one or two gaps for leading out wires is or are formed in the plurality of magnetic ring housings; foil winding coils are wound outside the magnetic columns; and a filling material is filled in a space in the pot body. By the assembled single-phase reactor, the technical problems that the conventional single-phase reactor product made of soft magnetic powder metallurgy materials and foil winding coils is low in electromagnetic compatibility and high in magnetic flux leakage, cannot change the capacity and the technical characteristic of the product conveniently, and the like can be solved.
Owner:BEIJING IN POWER ELECTRIC +1
Power amplifier for satellite communication system and satellite communication system
ActiveCN109743101BSolving Electromagnetic Compatibility IssuesSimple structureMagnetic/electric field screeningRadio transmissionCommunications systemAmplifier
The invention relates to a power amplifier for a satellite communication system and the satellite communication system. A power amplifier for a satellite communication system includes a first functional module; a second functional module; a shielding sleeve, the two ends of the shielding sleeve are respectively connected to the first functional module and the second functional module; and a cable piece, a cable piece Both ends of the cable are respectively electrically connected to the first functional module and the second functional module, and the cable part is passed through the shielding sleeve. A satellite communication system includes the aforementioned power amplifier for the satellite communication system. The cable parts are passed through the shielding sleeve, which solves the problem of electromagnetic compatibility compared with the traditional installation method of multiple plug-in connectors, and has a simpler structure and is easier to assemble and disassemble.
Owner:睿高(广州)通信技术有限公司
A block chain server data line installation frame with anti-falling effect
ActiveCN112201986BNo data loss issuesPrevent disengagementCoupling device detailsClassical mechanicsEngineering
Owner:上海极目银河数字科技有限公司
A double-reflection and single-transmission metasurface antenna with three beam angles
ActiveCN108649336BAchieve highly directional radiationAchieve multi-beam characteristicsRadiating elements structural formsIndividually energised antenna arraysEngineeringDouble reflection
Owner:XIDIAN UNIV
Electro-detection case suitable for oscillatory scanning type infrared earth sensor testing
InactiveCN100578260CAvoid complexitySolving Electromagnetic Compatibility IssuesCosmonautic vehicle trackingElectromagnetic wave reradiationAvometerTransmission quality
The electric check box suitable for oscillating scanning infrared earth sensitive testing comprises multi interfaces on the shell, circuit board inside the shell, 220V AC interface, DC interface, sensitive power switch, electric check box main switch, testing interface, sensor power supply current display unit, sensor signal interface, sensor current interface, signal source interface and work controlled machine interface. The oscillating scanning infrared earth sensor signal interface connects with its power interface, signal source equipment connects with it through the interface, so does the working controlled machine. It can make barricading drive handling for the check signal, for electrograph or avometer, using high precision linear optical coupling barricading handling for input and output analog signal, effectively ensuring the signal transmission quality.
Owner:BEIHANG UNIV
Device for detecting intervertebral disc pressure
InactiveCN102631203BSuitable for Surgical EnvironmentSolving Electromagnetic Compatibility IssuesMuscle exercising devicesElectrical resistance and conductanceElectricity
The invention relates to a device for detecting intervertebral disc pressure, comprising a plurality of resistance strain gauges (1) which are stuck to the detected position of the surface of intervertebral disc and used for detecting signals and a stress detection transmitter (2) which is electrically connected with the resistance strain gauges (1), wherein the stress detection transmitter (2) comprises inner bridge units, operation amplifier units, analog-to-digital conversion units and wireless transmission modules which are successively electrically connected; the inner bridge units and the corresponding resistance strange gauges (1) constitute bridges; the resistance strain gauges (1), the inner bridge units, the operation amplifiers and the analog-to-digital conversion units have the same number and correspond with one another. The device further comprises an upper computer which is in wireless communication with the stress detection transmitter (2). The device can realize trauma-free direct nondestructive test or measurement of pressure of intervertebral disc.
Owner:RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
Communication power supply system
ActiveCN102308516BLow costSolving Electromagnetic Compatibility IssuesData switching current supplyEngineeringSignal processing
A communication power supply system relates to the field of communications, which can reduce the costs of isolation in the communication power supply system and improve isolation efficiency. The communication power supply system in the embodiments of the present invention includes: a power supply monitor unit and at least one power supply unit, with the power supply monitor unit including a signal processing module, an A / D conversion module, a central processing unit and a communication module and further including an isolation module provided between the A / D conversion module and the central processing unit for isolating the negative electrode bus of the power supply unit from the central processing unit and the communication module, wherein the signal processing module is connected to the A / D conversion module and the central processing unit is connected to the communication module.
Owner:HUAWEI DIGITAL POWER TECH CO LTD
A method and system for dimming LEDs based on ambient brightness
ActiveCN108156690BAdjust output powerAchieve dimmingElectrical apparatusElectroluminescent light sourcesSignal onSignal generator
The invention provides an LED dimming method and system based on ambient brightness, which collects ambient brightness information through a brightness sensor, generates an ambient brightness signal, and transmits the ambient brightness signal to a PWM signal generator; the PWM signal generator receives the ambient brightness signal, Determine the dimming level; the PWM signal generator generates a voltage change signal corresponding to the dimming level on the LED drive line according to the dimming level; the LED driver collects the voltage change signal through the drive line, and according to the collected voltage The change signal determines the dimming level, and the output power is adjusted to achieve the purpose of dimming. The invention transmits the dimming information through the voltage change signal on the LED driving circuit, and solves the problems of equipment cost, installation cost and electromagnetic compatibility caused by additionally adding a dimming signal transmission circuit in the prior art.
Owner:TRIDONIC
A high power density two-speed electric drive device for tracked vehicles with integrated design
ActiveCN111355340BImprove power densityReduce weightAssociation with control/drive circuitsMechanical energy handlingLine tubingElectric machine
The invention discloses an integrated design high power density two-speed electric drive device for crawler vehicles, comprising a left two-speed transmission, a left drive motor, a right drive motor, a right two-speed transmission, a drive motor controller, a high-voltage line bundle. Among them, the left two-speed transmission, the left drive motor, the right drive motor, and the right two-speed transmission are coaxially arranged, and the drive motor controller is installed above the left two-speed transmission and the right two-speed transmission; the high-voltage wiring harness is respectively connected to the drive Motor controller and left drive motor, drive motor controller and right drive motor. The electric driving device of the present invention is a compact structure, with high power density, light overall weight, small space occupation of the power cabin, no complicated connecting pipelines, overall hoisting, convenient replacement, high allowable working speed, and long-term stable operation Good performance, simple and reliable sealing structure, etc.
Owner:JIANGLU MACHINERY & ELECTRONICS GROUP
An integrated system of SAR and wireless communication and its realization method
ActiveCN105306130BReduce constraintsReduce consumptionRadio transmissionHigh level techniquesComputer moduleEngineering
The invention relates to an SAR and wireless communication integrated system. An output end of an FPGA controller is connected with an input end of a D / A converter, the output end of the D / A converter is connected with the input end of an analog transmission channel, the output end of the analog transmission channel is connected with the input end of an A / D converter, the output end of the A / D converter is connected with the input end of the FPGA controller, a circulator is in two-way communication with a phased-array antenna, and the FPGA controller is in two-way communication with a digital beam forming module. The invention further discloses an implementation method of the SAR and wireless communication integrated system. The SAR and wireless communication integrated system provided by the invention achieves a broadband wireless mobile communication function, not only reduces the requirements on the volume and weight of the equipment, but also reduces the energy consumption and avoids the problem of complex electromagnetic compatibility to a certain extent.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
EMI filtering device
ActiveCN110880865ASuppression of coupling phenomenaSatisfy electromagnetic compatibilityPower conversion systemsMechanical engineeringCrosstalk
The invention provides an EMI filtering device. The device comprises a shell, a cover plate, a power supply filtering assembly, a signal filtering assembly and a clamping seat, the cover plate is detachably connected with the shell; the cover plate is used for sealing the shell to form a sealed cavity; the cavity is divided into a first mounting cavity, a second mounting cavity and a third mounting cavity through partition plates; a power supply filtering assembly is mounted in the first mounting cavity; a power input connector is installed on the side wall of the shell. The power supply inputconnector is used for inputting a power supply signal to the power supply filtering assembly. A signal filtering assembly is mounted in each second mounting cavity; at least one signal input interface is installed at the top of the shell. An output connector is installed on the side, deviating from the power input connector, of the shell, a clamping groove is further formed in the side wall of the shell, the clamping base is detachably connected with the clamping groove, a printed board rectangular connector is installed on the clamping base, and the problem that in the prior art, crosstalk coupling is prone to being formed between interference signals is solved.
Owner:CHONGQING DAJI ELECTRONICS TECH
led light board, scanning card and combined structure, led display control system
Owner:XIAN NOVASTAR TECH
Reinforced magnetic disc array
InactiveCN101477825BSolve the anti-vibration and shockSolving Electromagnetic Compatibility IssuesCarrier constructional parts dispositionUndesired vibrations/sounds insulation/absorptionRAIDTemperature control
The invention discloses a ruggedized redundant array of independent disks (RAID) and belongs to the technical field of RAID. An RAID controller, a redundancy power supply and a hard-disk pack are arranged inside a chassis, wherein, the RAID controller is connected with an interface board and controls a plurality of hard disks which are connected; a backplate is arranged in the chassis, socket connectors are arranged on the baseplate, and the RAID controller is oppositely connected with the socket connectors on the baseplate through the socket connectors; the overall shock absorption of the hard disk is performed by means of hard disk silica shock absorption, and the hard disk is oppositely inserted with the socket connectors on the baseplate through socket connectors, socket connectors are connected with the baseplate through adopting a flexible printing circuit board (PCB); the redundancy power supply is fixed through adopting a locking device and connected with a pinboard of the power supply, and the pinboard of the power supply and the baseplate are connected through the flexible PCB; and a temperature-control plate is arranged in the chassis and matched with the pinboard of the power supply. The ruggedized RAID solves the deficiencies in the storage device of the RAID, and has the advantages of anti-vibrating and impact, electromagnetic compatibility, and moisture proofing, mould proofing, salt spraying proofing and the like.
Owner:SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
A power amplifier for a satellite communication system and the satellite communication system
ActiveCN109743101ASolving Electromagnetic Compatibility IssuesSimple structureMagnetic/electric field screeningRadio transmissionAudio power amplifierComputer module
The invention relates to a power amplifier for a satellite communication system and the satellite communication system. A power amplifier for a satellite communication system includes a first functional module; A second functional module; a shielding sleeve, wherein Two ends of the shielding sleeve are respectively connected with the first functional module and the second functional module; a cable piece, wherein The two ends of the cable piece are electrically connected with the first function module and the second function module respectively, and the cable piece is arranged in the shielding sleeve in a penetrating mode. The satellite communication system comprises the power amplifier for the satellite communication system. The cable piece penetrates through the shielding sleeve. Compared with the traditional installation mode of a plurality of plug connector, the electromagnetic compatibility problem is solved, the structure is simpler, and the assembly and disassembly are convenient.
Owner:睿高(广州)通信技术有限公司
Two-phase zero-crossing signal detection circuit and optical fiber signal transmission system
ActiveCN108872695BSimple structureLow costCurrent/voltage measurementElectromagnetic transceiversMaterials scienceTransmitter
The invention discloses a double-phase zero-crossing signal detection circuit required by a bidirectional spark ignition circuit, and an optical fiber signal transmission system. The detection circuitcomprises an input RC filter circuit, a positive and negative half-cycle zero-crossing signal detection and pulse driving circuit, and a positive and negative half-cycle zero-crossing detection pulsefiber transmitter and receiver. One end of the positive and negative half-cycle zero-crossing signal detection and pulse driving circuit is connected with a power frequency alternating current through the input RC filter circuit, and the other end is connected with the positive and negative half-cycle zero-crossing detection pulse fiber transmitter. The positive and negative half-cycle zero-crossing detection pulse fiber transmitter transmits a zero-crossing detection pulse to the positive and negative half-cycle zero-crossing detection pulse fiber receiver, and finally transmits the zero-crossing detection pulse to a single-chip microcomputer. The circuit can simultaneously meet the requirements of the AC zero-crossing signal detection, the AC electrode polarity detection and the high-speed fiber pulse signal transmission, is simple in circuit principle, and is easy to manufacture and debug.
Owner:广东中科谛听科技有限公司
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