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239results about How to "Reduce electromagnetic interference" patented technology
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Dynamic strain testing method for surface of rotating body in electromagnetic environment
PendingCN119509332Ahigh sensitivityHigh measurement accuracySustainable transportationElectrical/magnetic solid deformation measurementData acquisitionElectromagnetic environment
The invention provides a method for testing the dynamic strain of the surface of a rotating body in an electromagnetic environment. The method comprises the following steps: constructing a bridge by using strain gauges and acquiring dynamic characteristic data of the rotating part under actual constraint conditions; performing simulation calculation according to the dynamic characteristic data, and determining the optimal pasting position of the strain gauge; pasting a strain gauge and formulating a wiring scheme of a strain gauge wire; the strain gauge is connected with a voltage signal amplifier, the amplified signal is connected with a data acquisition system through a conductive slip ring, and the amplified strain signal is recorded and processed; acquiring strain signals in real time and taking the strain signals as test data, and performing whole-course test in a full-rotating-speed range to complete dynamic strain test on the surface of the rotating body. The system has high sensitivity, the sensitivity and the measurement precision of the system are improved through full-bridge configuration, larger output signals are provided, the full bridge can achieve temperature compensation through symmetrical circuit design, and the system has good linear output characteristics and facilitates signal processing and analysis within the strain range.
Owner:HARBIN INST OF TECH
Multi-cable parallel connection anti-bias cable structure
ActiveCN119601294Aeasy to useImprove efficiencySuspension arrangements for electric cablesInsulated cablesStructural engineeringControl theory
The invention discloses a multi-cable parallel connection anti-bias cable structure, and relates to the technical field of cables, the cable structure comprises a cable body, the cable body is provided with a mounting mechanism, the mounting mechanism comprises a circular ring groove, two circular pipes, a three-way pipe, a sealing plug and a clamping groove, and a rectangular block is fixed in the circular ring groove; according to the invention, the installation mechanism is arranged, so that the multi-cable parallel-connection anti-bias-current cable and the suspension wire can be conveniently installed in an overhead manner in the long-distance overhead laying process, that is, when the multi-cable parallel-connection anti-bias-current cable is subjected to long-distance overhead laying, a constructor can distribute and install the suspension wire and the cable at equal intervals; therefore, the situation that the service life of the cable is affected due to uneven stress of the cable is avoided, the using effect of the multi-cable parallel connection anti-bias-current cable is improved, and meanwhile the using efficiency of the multi-cable parallel connection anti-bias-current cable is improved.
Owner:WUXI YUHENG CABLE CO LTD
QSFP-DD packaging 400G optical module structure
InactiveCN119620313Aquality improvementImprove stabilityCoupling light guidesInterior spaceLight signal
The invention relates to a QSFP-DD packaging 400G optical module structure, and belongs to the technical field of optical modules. Comprising a module upper cover, a module base and a pull ring, the module upper cover and the module base form a containing cavity, an MPO optical fiber adapter and a module circuit board assembly are arranged in the containing cavity, and first cooling fins and second cooling fins are arranged on the module upper cover and the module base respectively; the module circuit board assembly comprises a PCB, a heat dissipation block is arranged on the PCB, and a heat dissipation table is arranged on the module upper cover. A module upper cover and a rubber coating area are arranged on the inner side of the pull ring, a pull ring handle is arranged at one end of the pull ring, and the pull ring handle is flush with the bottom of the module base. According to the QSFP-DD packaging 400G optical module structure provided by the invention, the heat dissipation efficiency is remarkably improved, the MPO jumper wire insertion space is optimized, more internal space of the PCB is provided, the signal loss is reduced, the connection stability of the light-transmitting assembly and the silicon optical assembly is enhanced, and the optical signal loss is reduced.
Owner:HUAXIA XINZHIZHI PHOTONICS TECH (BEIJING) CO LTD
New energy high-frequency wire harness design method based on electromagnetic compatibility optimization
ActiveCN119578054ARealize analysisimprove accuracyDesign optimisation/simulationInterference resistanceNew energy
The invention aims to provide a new energy high-frequency wire harness design method based on electromagnetic compatibility optimization, and relates to the technical field of new energy, and the method comprises the steps: 1, building a new energy high-frequency wire harness type electromagnetic source model, and obtaining the electromagnetic source intensity; calculating a spatial electromagnetic field intensity based on the electromagnetic source intensity; step 2, calculating equivalent transmission line parameters based on the space electromagnetic field intensity; based on the equivalent transmission line parameters, frequency-dependent characteristic impedance is calculated; step 3, calculating crosstalk voltage according to the frequency-variable characteristic impedance; calculating a radiation field of the new energy high-frequency wire harness; calculating the shielding effectiveness of the new energy high-frequency wire harness according to the radiation field; 4, according to the step 1, the step 2 and the step 3, constraint conditions are set, an objective function under the constraint conditions is established, and the objective function is solved through iteration to find the corresponding optimal design parameter vector of the new energy high-frequency wire harness. According to the invention, the transmission stability and the anti-interference capability of the new energy high-frequency wire harness are significantly improved.
Owner:GUANGDONG DINGDUAN INTELLIGENT TECHNOLOGY CO LTD
Vibration signal detection system and method for motor state diagnosis
PendingCN119642960AGuaranteed accuracyReduced Sensitivity EffectsSubsonic/sonic/ultrasonic wave measurementUsing electrical meansMedicineMotor vibration
The invention relates to a vibration signal detection system for motor state diagnosis and a method thereof, the system comprises a piezoelectric acceleration sensor, a charge transfer module, a range selection module, an amplification module, an oscilloscope acquisition module and a data analysis module which are connected in sequence, and the piezoelectric acceleration sensor is used for acquiring charges generated by vibration; the charge transfer module is used for determining charge change in the vibration process; the range selection module is used for adjusting the gain of the amplification module; the amplification module is used for amplifying the charge change signal; the oscilloscope acquisition module is used for acquiring the amplified charge change signal; and the data analysis module performs fast Fourier transform and frequency sweep sampling calculation processing on the signals acquired by the oscilloscope acquisition module to obtain a vibration frequency value. Compared with the prior art, the method detects the dynamic process of vibration, is rich in perceivable characteristic parameters, effectively improves the measurement precision of motor vibration signals, and is suitable for motor state diagnosis application based on technologies such as deep learning.
Owner:SHANGHAI DIANJI UNIV
Electromagnetic composite nondestructive testing sensor, system and method
ActiveCN114295258Bprecise positioningReduce processing difficultyForce measurement by measuring magnetic property varation
The present invention discloses an electromagnetic composite nondestructive testing sensor, system and method, belonging to the field of nondestructive testing technology, including an excitation component and a receiving component; the excitation component includes a first excitation coil for receiving an extremely low frequency excitation signal, a low frequency excitation signal or a medium-high frequency excitation signal, and a second excitation coil for receiving a medium-low frequency excitation signal or a high frequency excitation signal. The excitation component and the receiving component working based on excitation signals of different frequencies are integrated into the same sensor, and different excitation signals are introduced into the first excitation coil and the second excitation coil at different times to achieve different nondestructive tests, including eddy current detection, AC electromagnetic field detection, magnetic Barkhausen noise detection, incremental magnetic permeability detection and other nondestructive tests, so as to obtain stress changes caused by microstructures, the influence of incremental magnetic permeability on stress, and the influence of electrical conductivity and magnetic permeability on stress, so as to accurately judge the stress size of components, and provide an experimental verification basis for the study of complex stress theory.
Owner:SICHUAN CHENGDIAN MULTIPHYSICAL INTELLIGENT PERCEPTION TECH CO LTD
Novel armored cable
ActiveCN222562308UEasy to fixHigh mechanical strengthClimate change adaptationInsulated cablesFiberCarbon fibers
The utility model discloses a novel armored cable, and belongs to the technical field of armored cables. Comprising a plurality of semi-conductive conductor shielding sleeves, a plurality of conductor cores are arranged in the semi-conductive conductor shielding sleeves, the peripheries of the semi-conductive conductor shielding sleeves are fixedly sleeved with an electromagnetic shielding sleeve, the outer wall of the electromagnetic shielding sleeve is sleeved with a fireproof layer, the outer wall of the fireproof layer is sleeved with a non-metal armor layer, and the outer wall of the non-metal armor layer is sleeved with a fireproof layer. A plurality of supporting strips are arranged in the non-metal armor layer and are annularly and uniformly distributed, and the supporting strips in the non-metal armor layer are made of carbon fiber reinforced plastic materials, so that the non-metal composite materials have excellent mechanical strength and light weight characteristics, the mechanical protection performance of the cable can be ensured, and the service life of the cable is prolonged. The weight of the cable is remarkably reduced, laying and installation are facilitated, the elastic bands are installed between the adjacent supporting strips, the multiple supporting strips can be evenly distributed on the outer wall of the fireproof layer through installation of the elastic bands, and meanwhile the multiple supporting strips can be conveniently fixed.
Owner:SICHUAN ZHONGDASHUN PETROLEUM TECH CO LTD
Binding post assembly of ultrasonic gas meter
ActiveCN222546742UImprove anti-interference abilitySimple structureVolume/mass flow measurementCouplings bases/casesElectromagnetic interferenceNeedle Shape
The utility model discloses an ultrasonic gas meter binding post assembly which comprises a binding post body, a needle-shaped terminal, a waterproof connector needle-shaped male end, a circuit board, a valve signal female end and a metering module signal female end, the circuit board is arranged in the binding post body, the needle-shaped terminal and the waterproof connector needle-shaped male end are both arranged on the circuit board, and the valve signal female end is connected with the metering module signal female end. The number of the waterproof connector needle-shaped male ends is two, the two waterproof connector needle-shaped male ends are arranged on the lower surface of the circuit board, and the valve signal female end and the metering module signal female end are detachably connected with any waterproof connector needle-shaped male end to achieve function transmission. According to the ultrasonic gas meter binding post assembly, connection of an external signal line can be omitted, electromagnetic interference is reduced, and the anti-interference performance of an ultrasonic gas meter is improved; the binding post is simple in structure, the binding post body and the circuit board are injection-molded, and connection is stable; meanwhile, a plurality of sealing grooves are formed and used for sealing the binding posts, the controller and the gas meter shell, and the connection reliability is high.
Owner:ZENNER METERING TECH (SHANGHAI) LTD
PCB layout design method and system based on heat dissipation optimization
PendingCN119603868AImprove cooling effectGuarantee stabilityCross-talk/noise/interference reductionCircuit artworks manufactureHemt circuitsElectromagnetic interference
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.
Owner:GUANGZHOU KETENG INFORMATION TECH
Magnetic gathering type linear motor
ActiveCN222531516USolution to short lifeReduce electromagnetic interferenceMagnetic circuit stationary partsPropulsion systemsMagnetic effectElectric machine
The utility model discloses a magnetism gathering type linear motor, comprising a stator comprising a stator yoke portion extending along the X-axis direction and a plurality of stator tooth portions arranged on the stator yoke portion at intervals along the X-axis direction; the mover is arranged opposite to the stator in the Y-axis direction, and the mover comprises a mover yoke part and an iron core monomer connected with the mover yoke part; each single iron core comprises an iron core end part and first permanent magnets and second permanent magnets which are arranged on the iron core end part, the magnetizing directions of the first permanent magnets and the second permanent magnets are not parallel, the first permanent magnets and the second permanent magnets are alternately arranged along the X-axis direction, the number of the first permanent magnets is N, the number of the second permanent magnets is N-1, and N is greater than or equal to 2; the stator tooth part comprises a stator top wall adjacent to the iron core single body and two first stator side walls connected to the two sides of the stator top wall in the X-axis direction, and a chamfer structure is formed between the stator top wall and the first stator side walls. By adopting the structure, the magnetic gathering effect is obvious, and the cogging force of the motor is effectively reduced.
Owner:SUZHOU SEIDAL INTELLIGENT TECH CO LTD
Cable support for electrical installation engineering
ActiveCN222638077UHelps dissipate heatReduce electromagnetic interferenceSuspension arrangements for electric cablesPhotovoltaic energy generationElectromagnetic interferenceStructural engineering
The utility model discloses a cable support for electrical installation engineering, which particularly relates to the technical field of electrical installation and comprises a bottom plate, the distance between two adjacent vertical plates can be adjusted according to actual needs, and the appropriate distance is beneficial to heat dissipation of cables, can reduce electromagnetic interference between the cables and can ensure the quality of signal transmission. When the cable clamping device is used, two clamping blocks can be pinched to move in opposite directions, then a second spring telescopic rod is compressed, the two clamping blocks enter a sliding groove, then a vertical plate is moved to a proper distance, then the vertical plate is fixed through the second spring telescopic rod, then a cable can be clamped and fixed in a first clamping ring and a second clamping ring, the cable is limited, and the cable is prevented from being wound together; when the long plate needs to be maintained and overhauled, the double-end threaded rod can be rotated to drive the two sliding blocks to move back to back, then the two vertical plates are driven to move back to back, then the inserting columns are driven to move out of the vertical rods, then the long plate is taken out of the C-shaped plate, and the long plate is convenient to mount and dismount.
Owner:GUANGDONG XUGANG METAL TECHNOLOGY CO LTD
Battery pack
PendingCN119627345AIncrease energy densityReduce space consumptionPrinted circuit aspectsCells structural combinationElectrical batteryElectronic component
The battery pack comprises a box body, a battery pack and a battery pack circuit breaking unit, and the box body is internally provided with a battery bin and an electrical bin which are formed by separation of a separation beam; the battery pack is arranged in the battery compartment, and the battery pack circuit breaking unit is arranged in the electrical compartment; the battery pack circuit breaking unit comprises a shell, a circuit board and electronic elements connected with the circuit board, the circuit board is arranged in the shell, the electronic elements are arranged on two side board surfaces of the circuit board, a main positive relay and a main negative relay are arranged on the lower board surface of the circuit board at intervals, and a heating relay and a pre-charging relay are arranged on the upper board surface of the circuit board. By applying the scheme, the board area of the circuit board of the battery pack circuit breaking unit can be reduced, the space occupied by the battery pack circuit breaking unit in the battery pack can be saved, the size of an electrical cabin can be effectively reduced, and more accommodating space in a battery pack box body can be distributed to one side of the battery cabin; and a good technical guarantee is provided for integrally improving the energy density of the battery.
Owner:CALB GROUP CO LTD
Electromagnetic interference suppression method and device for PWM signal, electronic equipment and storage medium
PendingCN119543636AEMI suppressionReduce electromagnetic interferenceDC motor rotation controlElectric/fluid circuitSoftware engineeringElectromagnetic interference
The invention provides an electromagnetic interference suppression method and device for a PWM signal, electronic equipment and a storage medium, and relates to the technical field of vehicles, and the method comprises the steps: obtaining a PWM signal generated by a drive circuit and an original drive frequency of the PWM signal, the original drive frequency being a higher harmonic frequency corresponding to the PWM signal; at least one first target driving frequency corresponding to the original driving frequency is determined, the first target driving frequency is different from the original driving frequency, the first target driving frequency is any driving frequency in a preset driving range, and the at least one first target driving frequency is not completely the same; and controlling the driving circuit to drive based on the at least one first target driving frequency. According to the invention, the electromagnetic interference of the PWM signal can be effectively suppressed, and the harmfulness of EMI radiation interference is reduced.
Owner:BEIJING CO WHEELS TECH CO LTD
Flexible flame-retardant indoor photoelectric composite cable with multi-layer composite compression-resistant structure
ActiveCN224177137UStable internal support structureimprove protectionInsulated cablesInsulated conductorsSilicone GelsElectrical conductor
The utility model relates to a flexible flame-retardant indoor photoelectric composite cable with a multilayer composite compression-resistant structure, which comprises a central supporting unit, a cable core assembly, a composite reinforcing layer, a flame-retardant layer and an outer sheath which are sequentially arranged from inside to outside, the adjacent elastic rods are bonded through hot melting to form a 90-degree orthogonal supporting structure, the cable core assembly comprises optical fiber units and power conductors which are symmetrically distributed in four quadrants of a central supporting unit, one optical fiber unit and one power conductor are arranged in each quadrant, and the four macromolecule elastic rods arranged in a cross shape form a supporting framework. A stable internal supporting structure is provided for the whole optical cable, it is ensured that the optical cable structure is not prone to deformation in a complex environment, the section of the macromolecule elastic rod is fan-shaped, the containing groove is filled with thixotropic silica gel, the buffering and damping effect is further enhanced, internal assemblies can be better protected, and the optical cable is suitable for different installation and use environments.
Owner:JIANGSU YOUMI INTELLIGENT TECH CO LTD
Intelligent compression device for puncture point
InactiveCN119587107AEasy to planreasonable layoutTourniquetsCompression deviceMechanical engineering
The invention relates to the technical field of medical auxiliary instruments, in particular to a puncture point intelligent compression device which comprises a fixing pad, a hemostatic pad and a compression air bag, a flexible sleeve is fixedly connected to the lower surface of the fixing pad, an adhesive layer is arranged on the lower surface of the fixing pad around the flexible sleeve, and an imbedding hole communicated with the flexible sleeve is formed in the upper surface of the fixing pad; the hemostasis pad is fixed to the surface of the lower end of the flexible sleeve, the compression air bag is arranged in the flexible sleeve, when the compression air bag is inflated, the compression air bag can vertically expand and extend downwards, and a fastening mechanism is arranged on the fixing pad. The fixing pad is adhered to the skin of a patient through the adhesive layer, it is guaranteed that the position of the hemostatic pad corresponds to the position of a hemostatic point, then the compression air bag is inflated, the compression air bag is inflated to expand and extend downwards, the hemostatic pad is pushed to be pressed on the hemostatic point, and effective compression hemostasis is achieved; and unsmooth blood flow and pressure sores of the lower limbs caused by long-time excessive tightening of the thighs of the patient are avoided, the structural layout is reasonable, and the practicability is high.
Owner:HAIKOU PEOPLES HOSPITAL
Motor
PendingCN119561332AReduce electromagnetic interferencestable speedMagnetic circuitSynchronous machines with stationary armatures and rotating magnetsLow noiseElectric machine
The invention relates to the field of internet, and discloses a motor which comprises at least one first magnet and at least one second magnet, the first magnet and the second magnet can rotate relative to each other, and at least one magnetic pole of the first magnet is wrapped by a wire; the wrapping direction of the wire is different from the relative rotation direction of the first magnet and the second magnet, and the heteropolar distance between the magnetic pole end, wrapped by the wire, of the first magnet and the second magnet is close to the homopolar distance. The motor has the advantages of stable rotating speed, high efficiency, low cost, less electromagnetic interference, low noise and long service life.
Owner:李晓阳
Self-adaptive reclosing hybrid direct-current circuit breaker suitable for direct-current power transmission and distribution system
ActiveCN119651513Areduce shockReduce electromagnetic interferenceEmergency protective arrangements for automatic disconnectionEmergency protective arrangements for limiting excess voltage/currentCapacitanceDistribution power system
The self-adaptive reclosing hybrid direct-current circuit breaker suitable for the direct-current power transmission and distribution system has a two-stage current limiting function and comprises a first-stage current limiting branch and a second-stage current limiting branch, the defect of a single fixed current limiting mechanism of an existing circuit breaker can be overcome by adopting two-stage current limiting, and when faults of different types and different severity occur, the current limiting mechanism can be changed, and the current limiting mechanism can be changed. The current change rate and the change range at the moment of a fault are large, the two-stage current limiting structure can preliminarily limit the rapid change of the fault current through the first-stage current limiting branch after the fault occurs, then the fault current is limited step by step through the two-stage current limiting structure, and the purpose of stably limiting the current is achieved. And energy impact and electromagnetic interference on other elements and equipment in the circuit caused by sudden, large and rapid change of the current are reduced. The structure of the fault discrimination branch circuit does not need to use a power supply to charge a capacitor C3, and only uses the inductance energy of a fault side line, thereby effectively avoiding the waste of energy.
Owner:HEBEI UNIV OF TECH
Ceramic tube shell and packaging structure
ActiveCN224084062URealize downsizingReduce electromagnetic interferenceElectromagnetic interferenceStructural engineering
The utility model discloses a ceramic tube shell and a packaging structure. The ceramic tube shell comprises a ceramic base body and a working assembly. The ceramic base body comprises a base and an enclosure part, the enclosure part is installed on one side of the base, an installation space is defined by the enclosure part and the base, the installation space is used for containing a chip, and the base is provided with a step located in the installation space; the working assembly comprises a power supply layer, a bonding layer, a signal layer and a back PAD layer, the power supply layer is arranged in the enclosure part, the bonding layer is arranged on the surface of the step, the signal layer is arranged in the base and located on the side, away from the power supply layer, of the bonding layer, and the back PAD layer is located on the side, away from the enclosure part, of the base. According to the scheme, the adverse effect of electromagnetic interference of the power supply layer on signal transmission can be effectively reduced, and the small size of the ceramic tube shell can be conveniently realized.
Owner:WUHAN SHANWAN NEW CERAMIC MATERIALS CO LTD
An electromagnetic shielding composite material structure
This utility model relates to the field of electromagnetic shielding materials technology, and provides an electromagnetic shielding composite material structure, including a first shielding layer and a protective structure. A second shielding layer is disposed on one side of the first shielding layer, and a protective structure is disposed inside both the first and second shielding layers. By providing the protective structure, when electromagnetic waves are incident on the electromagnetic shielding composite material, the first and second metal film layers effectively reflect most of the electromagnetic waves back to their original direction, thus preventing electromagnetic wave penetration. Furthermore, a heat insulation layer is provided to prevent heat transfer. This heat insulation layer is an electromagnetic shielding heat insulation material with functions such as heat insulation, waterproof sealing, and corrosion resistance, thereby protecting the internal structure or equipment of the composite material from the effects of high-temperature environments. Finally, a wear-resistant layer is made of transparent PET material, which has properties such as abrasion resistance and corrosion resistance.
Owner:WUXI LIDA SHIELD MASCH ROOM COMPLETE SET CO LTD
Program burning carrier
ActiveCN222619116UImprove programming efficiencyMeet power needsSoftware deploymentElectrical connectionCable harness
The utility model provides a program burning carrier. The program burning carrier comprises a box body, wherein the top of the box body is open; a plurality of spring probes are arranged on the part, outside the box body, of the bottom plate, penetrate through the bottom plate of the box body and extend into the bottom plate; an internal PCBA board slot connector is arranged in the box body, an internal PCBA board is installed in the internal PCBA board slot connector, and the internal PCBA board is connected with an external power supply; the spring probe is electrically connected with the internal PCBA board slot connector; a side plate of the box body is provided with a plurality of adapters, and the adapters are electrically connected with the internal PCBA board slot connector; and a board card to be burnt is arranged at the top of the box body and is electrically connected with the internal PCBA board. According to the PCBA board card program programming carrier, the board card chip program programming carrier is unified, various simulators and wire harnesses can be connected through the adapters, the problem that the simulators and the wire harnesses are switched for multiple times is solved, and the PCBA board card chip program programming efficiency is improved.
Owner:CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO LTD
Packaging structure and method of optical sensor and electronic equipment
PendingCN121969171AShorten the transmission pathImprove stabilityMeasurement apparatus componentsLead frameOptical transducers
The invention relates to the technical field of sensor packaging, and discloses a packaging structure and method of an optical sensor and electronic equipment, and the packaging structure comprises a lead frame, and a radio frequency main control chip and an optical sensor chip which are fixed on the lead frame; the lead frame comprises a first base island, a second base island, a radio frequency antenna and a pin group, and the first base island and the second base island are electrically isolated from each other; the radio frequency main control chip is mounted on the first base island, the surface, deviating from the light-sensitive surface, of the optical sensor chip is mounted on the second base island, and a radio frequency transceiving pin of the radio frequency main control chip is connected with the radio frequency antenna; a data transmission pin of the optical sensor chip is connected with a corresponding function pin of the radio frequency main control chip; and the radio frequency main control chip and the optical sensor chip are respectively connected to corresponding pins in the pin group. According to the invention, the radio frequency path can be shortened, the anti-interference performance is improved, and high-integration low-cost packaging is realized.
Owner:GUANGDONG GUOFENG SEMICON CO LTD
An electromagnetic interference resistant device using isolated ground handling
ActiveCN224385998UReduce electromagnetic interferenceUse is not affectedMagnetic/electric field screeningElectromagnetic interferenceMetallic materials
This invention belongs to the field of electromagnetic interference (EMI) suppression technology, and proposes an EMI suppression device using isolated grounding. It includes shielded modules that act as interference sources or receivers for each other, and a shielded transmission circuit for signal transmission. The shielded modules include camera mechanisms, modules that easily generate high-frequency signals, and modules that easily generate large currents. The shielded transmission circuit includes transmission cables connecting each shielded module. This device is simple, easy to implement, and easy to operate. It mainly utilizes the conductivity of metallic materials to transmit external electromagnetic interference, which is easily received by the shielded modules and the transmission circuit cables, to the ground through a conductive layer. Simultaneously, the transmitted circuit signals are also protected, thus preventing electromagnetic interference to the shielded modules and the transmission circuit cables, allowing the equipment to maintain normal operation.
Owner:HENAN COSTAR GRP CO LTD
Motor FPC ultrathin cover film processing technology and device
PendingCN121755918ASmooth stubborn deformationincrease contactLaser beam welding apparatusElectric machineElectromagnetic interference
The invention relates to the technical field of FPC ultra-thin cover film processing, and discloses a motor FPC ultra-thin cover film processing technology and device.The motor FPC ultra-thin cover film processing device comprises a fixing base, an unwinding assembly, a guide roller set, a conveying assembly, a laser cutting assembly and an attaching assembly and further comprises a bulldozing mechanism arranged on the conveying assembly; a first electric push rod drives a push roller to press down and fit an ultrathin cover film, a second electric push rod is linked with a synchronous rod to drive the push roller to roll directionally to flatten and smooth stubborn deformation which cannot be eliminated by a guide roller set, it is ensured that the ultrathin cover film is flatly fit with a workbench, meanwhile, a flattening reference is provided for laser cutting, meanwhile, a foundation is built for follow-up fitting, and the production efficiency is improved. And virtual adhesion and poor contact caused by the fact that the periphery of the opening cannot be compacted are prevented, the high-precision machining requirement of the ultra-thin cover film is met, and compared with a cover film with the conventional thickness, the ultra-thin cover film can reduce signal loss and electromagnetic interference in cooperation with the ultra-thin cover film.
Owner:TELECONIX INC
Rectangular view field design method for ultraviolet non-line-of-sight communication receiving end and application of rectangular view field design method
PendingCN121934265AReduce the effects of stray lightReduce electromagnetic interferenceClose-range type systemsElectromagnetic receiversOptical communicationMechanical engineering
The invention provides a rectangular field-of-view design method for an ultraviolet non-line-of-sight communication receiving end and application thereof, and belongs to the technical field of wireless optical communication, the method comprises the following steps: pre-determining the center distance length of a light shield and the upper field-of-view angle, the lower field-of-view angle, the left field-of-view angle and the right field-of-view angle of a rectangular receiving field-of-view; based on the center distance length, the upper view field angle, the lower view field angle, the left view field angle, the right view field angle and the width and length of the rectangular light sensing surface, calculating structural parameters of a light shield used for generating the rectangular receiving view field; wherein the structural parameters comprise the upper and lower edge lengths, the left and right edge lengths and the position of a vertical center point of a larger rectangular opening of the light shield. Through the design of the rectangular view field and the accurate matching of the rectangular light-sensitive surface, the photon receiving efficiency is remarkably improved, stray light and electromagnetic interference are effectively inhibited, and thus the signal-to-noise ratio of weak light signal detection and the system sensitivity are improved.
Owner:CHINESE PEOPLES LIBERATION ARMY INFORMATION SUPPORT CORPS ENGINEERING UNIVERSITY
Wire harness filtering device and vehicle
ActiveCN222591413UReduce electromagnetic interferenceReduce external radiationStructural engineeringMechanical engineering
Owner:BEIJING CO WHEELS TECH CO LTD
Smooth brushless actuator
The application discloses a stable brushless actuator, which comprises a rear shell, a front shell, a stator assembly and a rotor assembly. A balance rotating joint is arranged on the rotating shaft end of the rotor assembly and in the internal cavity of the rear shell. A magnet is arranged on the other end of the rotating shaft. A functional circuit board is arranged on the stator assembly and close to the magnet. A lower bearing is arranged on the rotating shaft and close to the magnet. The balance rotating joint is in a "Z" shape structure. An upper bearing is arranged on the head of the balance rotating joint. The application adopts electronic commutation and is in a brushless mode. The application has the characteristics of lower noise, lower electromagnetic interference, more accurate control, simpler installation, more convenient maintenance and the like. The balance rotating joint arranged on the rotating shaft end strengthens the balance degree and stability of the rotating shaft. Therefore, the application has a longer service life and higher working efficiency.
Owner:浙江致森电控科技有限公司
Control method of voltage converter and energy storage system
PendingCN121966292AReduce the number of starts and stopsavoid large fluctuationsDc-dc conversionElectric variable regulationVoltage converterPower controller
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.
Owner:SHENZHEN HELLO TECH ENERGY CO LTD
Gated smart home system
ActiveCN224248047Ueasy to operateRich linkage functionsComputer controlTotal factory controlComputer hardwareKey pressing
The utility model provides a gated intelligent household system, and belongs to the technical field of intelligent household. Comprising a door control main control board, an intelligent door lock, an intelligent home linkage chip, an intelligent home gateway and a plurality of intelligent home sub-devices, the intelligent door lock is used for identifying unlocking operation of a user; the intelligent home linkage chip is arranged in the door control main control board, and the intelligent home linkage chip can receive an unlocking signal of the intelligent door lock and a signal of a shortcut key on a door control rear screen panel and generate a corresponding instruction data packet according to the received signal. According to the utility model, the intelligent household linkage chip is arranged, and the intelligent household linkage chip supports a wireless communication protocol of one of WIFI, Bluetooth or Zigbee, so that the intelligent household linkage chip can stably communicate with the intelligent household gateway, the linkage function of the door control and other household equipment is enriched, and the purpose of convenient and fast household automatic control is realized.
Owner:XIKA INTELLIGENT TECHNOLOGY (SHANGHAI) CO LTD
Three-dimensional electromagnetic interference isolation structure, preparation method and chip
PendingCN119673922AReduce electromagnetic interferenceEnsure consistencySemiconductor/solid-state device detailsSolid-state devicesElectromagnetic interference shieldingPhysics
The invention relates to the technical field of electromagnetic interference shielding in a chip, and provides a three-dimensional electromagnetic interference isolation structure, a preparation method and a chip, and the three-dimensional electromagnetic interference isolation structure comprises a plurality of grounding metal gaskets and a plurality of grounding holes. The grounding metal gasket is arranged on the surface of the chip; the plurality of grounding metal gaskets are arranged along the length direction of the gap between the adjacent function modules; one grounding metal gasket corresponds to two grounding holes; one end of the grounding hole is connected with the grounding metal gasket, and the other end of the grounding hole is connected with the grounding layer of the chip; and a bonding wire is bridged between every two adjacent grounding metal gaskets. According to the invention, the electromagnetic interference between two adjacent functional modules needing to be isolated in the chip can be reduced, various packaging designs can be compatible, the consistency of products is ensured, and the later debugging is also facilitated under the condition that the layout design of the chip is not changed, so that the risk caused by the redesign of the chip due to the electromagnetic interference is reduced.
Owner:成都智芯雷通微系统技术有限公司
A device for enabling wireless communication between underground manholes and the surface.
PendingCN122091967ASolve weak signalincrease signal strengthArtificial islandsMeasurement devicesTelecommunicationsData acquisition
This invention discloses a device for wireless communication between underground manholes and the ground, relating to the field of urban underground infrastructure monitoring technology. It solves the problem that manhole covers and frames are mostly made of metal, which strongly shields electromagnetic waves, affecting data acquisition by monitoring equipment inside the manhole. The key technical points include: a manhole frame support: an open-frame structure adapted to the manhole cover; an adjustment component on the support to adjust the diameter of the support to accommodate differences in the manhole cover's diameter; and an equipment support: located on the support, forming a downwardly protruding load-bearing structure. The effect is that by fixing the transmitting antenna in the gap between the manhole cover and frame, the electromagnetic shielding effect of the cover and frame is avoided, significantly enhancing signal strength compared to inside the manhole, ensuring normal data communication between the monitoring equipment inside the manhole and the ground.
Owner:BEIJING TEXT NETWORK TECH CO LTD