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94results about How to "Prevent external electromagnetic interference" patented technology
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Electrical connector
ActiveUS9525241B1Signal transmission be improveLow signalEngagement/disengagement of coupling partsTwo-part coupling devicesEngineeringElectrical and Electronics engineering
An electrical connector includes a middle shielding plate, a lower terminal module, an upper terminal module mounted on a top surface of the middle shielding plate, an insulation module and a shielding shell. The middle shielding plate is mounted on the lower terminal module. The lower terminal module includes a plurality of lower terminals which include two lower ground terminals. A front end of an outer side of each of the lower ground terminals is connected with a lower connecting piece. The upper terminal module includes a plurality of upper terminals which include two upper ground terminals. A front end of an outer side of each of the upper ground terminals is connected with an upper connecting piece. The shielding shell is mounted outside the lower terminal module, the upper terminal module and the insulation module.
Owner:CHENG UEI PRECISION IND CO LTD
Integrated optical isolation lightning electric field measurement apparatus
InactiveCN101963634AEasy to disassembleChange sensitivityVoltage/current isolationElectrostatic field measurementsDielectricEngineering
The invention discloses an integrated optical isolation lightning electric field measurement apparatus, which integrates the measurement of fast change and slow change of a lightning electric field. The measurement apparatus mainly comprises an electric field receiving antenna, a signal conditioning circuit, an optical transmitter, an all-dielectric optical cable, an optical receiver and a signal acquisition and real-time processing terminal. The signal conditioning circuit and the optical transmitter are integrated to realize signal acquisition and photoelectric conversion and transmit an optical signal through the all-dielectric optical cable. The entire conditioning circuit and the optical transmitter are closed in a flat metal cylindrical box, and have high electromagnetic interference resistance. The optical receiver converts the received optical signal into an electrical signal which is subjected to compensation, correction and amplification and then output to a recording apparatus. A signal of which the change (slow change or fast change) is not measured is inverted by a system function inversion method according to a certain change (fast change or slow change) signal of the measured electric field. Apart from simple structure and small volume, the integrated optical isolation lightning electric field measurement apparatus, which adopts optical fiber transmission and is powered by lithium batteries, has the advantages of high reliability, high adaptability, high electromagnetic interference resistance, adjustable dynamic range of measurement and high precision.
Owner:PLA UNIV OF SCI & TECH
All-in-one desktop computer
InactiveUS20110176268A1Improve structural stabilityLower the volumeElectrical apparatus contructional detailsHousing of computer displaysComputer moduleEngineering
An all-in-one desktop computer includes a display module, a holding body, a main assembly, and a back cover. The holding body is disposed on one side of the display module. The main assembly is disposed at the holding body. The back cover and the holding body are disposed on the same side of the display module, and the back cover covers the holding body and the main assembly. According to the all-in-one desktop computer, the main assembly is disposed at the holding body to position and fix the main assembly and to strengthen structure stability of the all-in-one desktop computer.
Owner:PEGATRON
Device for performance test of dynamic air-sensitive photosensitive material
InactiveCN101109757AAccurate Photogas Sensitive PropertiesPrevent external electromagnetic interferenceMaterial analysisLight filterLight source
The invention relates to the technology for measuring photosensitive and air-sensitive feature, in particular to a dynamic tester for photosensitive and air-sensitive performance, which comprises a specimen, a test pipe, a thermocouple, a computer, a light source, an inflation system, and a vacuum pump. Wherein, the specimen is placed in the test pipe, which are together placed in an electric oven; the test pipe is connected with the light source through an optic fiber; the specimen is located under the optic fiber; the thermocouple is located on the specimen and electrically connected with a temperature controller; the specimen is electrically connected through a lead-out wire with the computer; the test pipe is connected respectively with the inflation system and the vacuum pump through pipelines; the illuminance can be adjusted in a stepless way, the spectrum range can be changed by a filter, and the gas concentration, component and flow can be changed.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Wireless communication frequency hopping method
ActiveCN105812024AThe frequency hopping method is simpleFrequency Hopping Method EfficientPower managementConnection managementTelecommunicationsFixed frequency
A wireless communication frequency hopping method is disclosed and comprises the following steps: a plurality of wireless frequency points are preset, and a master terminal sends out predetermined format data; if return data from a slave terminal is received in preset time, communication connection is successfully established; otherwise the master terminal repeatedly sends out the preset format data and again confirm whether the return data from the slave terminal is received; if the return data from the slave terminal is not received when the times for which the master terminal sends out the preset format data reaches a preset number, the master terminal hops to another wireless frequency point and continues sending the preset format data after sleeping for a first time, and the preset format data sent from the main terminal is received by the slave terminal according to a fixed cycle; if the preset format data is received in a cycle, the data is returned to the master terminal, and communication with the master terminal is kept at corresponding frequency points; otherwise, the slave terminal hops to another wireless frequency point, and the master terminal and the slave terminal have a fixed frequency hopping sequence. The method is advantaged by simplicity, high efficiency and high reliability.
Owner:SHANGHAI KOHLER ELECTRONICS TECH
Flat sample space charge distribution measuring apparatus capable of preventing electromagnetic interference and method thereof
ActiveCN104833865AAvoid electromagnetic interferenceEMI implementationTesting dielectric strengthHigh-voltage direct currentHigh pressure
The invention discloses a flat sample space charge distribution measuring apparatus capable of preventing electromagnetic interference and a method thereof. The measuring apparatus comprises a high-voltage DC power source (1), a high-voltage lead (2), an insulation self-adhesive tape (3), a high-voltage resistor (4), a first waveguide tube (5), a signal shielding case (6), a current-limiting resistor (7), a blocking capacitor (8), a coaxial cable (9), a second waveguide tube (10), a sample shielding case (11), a metal pillar (22), an electrode measuring unit (100), an amplifier (20), a digital oscilloscope (21), a high temperature drying box (24) and a laser (25). According to the invention, the high-voltage lead is led to the signal shielding case through the first waveguide tube, and the signal shielding case is connected to the sample drying box through the second waveguide tube, so that electromagnetic interference by external environment can be effectively prevented; and the middle portion of the high-voltage lead is connected to the high-voltage resistor, so that the electromagnetic interference in the environment can be coupled to a circuit, and the environment electromagnetic interference can be effectively prevented.
Owner:NANJING NARI GROUP CORP +3
Compression-resistant and wear-resistant coaxial cable
InactiveCN108766643AEasy resetImprove stress resistanceFlexible cablesFlexible conductorsInsulation layerElectrical conductor
The present invention discloses a compression-resistant and wear-resistant coaxial cable. The coaxial cable comprises a rubber protective sleeve, a wear-resistant layer, wire cores and cable center bodies. One end of the inside of the rubber protective sleeve is provided with an external insulation layer, and the central location of the inside of the rubber protective sleeve is provided with the cable center bodies uniformly. The wire cores are uniformly arranged between the cable center bodies and the external insulation layer. The outside of each wire core is provided with a protective sleeve, the central location of the inside of each wire core is provided with conductors, and the outside of each conductor is provided with an internal crust. The other end of the inside of the rubber protective sleeve is provided with the wear-resistant layer, and a metal mesh layer is arranged between the wear-resistant layer and a buffer layer. According to the coaxial cable, by providing the buffer layer, a damping spring and reset springs uniformly arranged at the outside of each conductor, even if the coaxial cable is deformed under an external force, the coaxial cable can restore to the original state quickly after the external force is disappeared, and thus the cable can not be damaged.
Owner:安徽协创科技产业园有限公司
Single type testing transformer
InactiveCN106158315AReduce volumeReduce weightTransformersTransformers/inductances casingsTransformerSingle type
The invention discloses a single type testing transformer. The single type testing transformer comprises a short circuiting bar, an end cover, a first input terminal, a second output terminal, a high-voltage tail, an iron core and a main casing, wherein the end cover is arranged on the main casing, the main casing and the end cover are fixedly connected through a fixture, and a high-voltage bushing is connected onto the end cover and communicates with the main casing; a voltage sharing ball is arranged at the top of the high-voltage bushing and wraps and fixes the short circuiting bar and a high voltage output terminal; transformer handles are fixedly mounted on sides of the main casing. The single type testing transformer has the characteristics of being small in size, light in weight, compact in structure, complete in function, high in universality, convenient to use and the like; the main casing is prepared in an octagonal structure and is attractive and elegant in overall appearance; a high-voltage silicon stack is connected onto the short circuiting bar, is connected in a loop in series and has a half-wave rectification function, so that industry frequency alternate current is output from the high-voltage tail when the short circuiting bar and the high-voltage silicon stack are in short circuit.
Owner:成都君华睿道科技有限公司
Ultrasonic sensor used for detecting transformer partial discharge signal
InactiveCN101949996AAvoid incomingGood directionTesting dielectric strengthTectorial membraneSignal processing circuits
The invention discloses an ultrasonic sensor used for detecting a transformer partial discharge signal, which can prevent a non-receiving face signal from being introduced and has strong anti-electromagnetic interference performance and high precision. The ultrasonic sensor comprises a metal shell (1), wherein the front end of the metal shell (1) is fixed with a piezoelectric vibrator (2); a protective film (3) is arranged on the front face of the piezoelectric vibrator (2); and the piezoelectric vibrator (2) is connected with an output connector (5) through a signal processing circuit (4). The ultrasonic sensor is characterized in that the piezoelectric vibrator (2) is an axial polarized piezoelectric vibrator, and the two axial ends thereof are plated with metal electrodes (6); the protective film (3) is a ceramic protective film, and the inner surface and the side face of the protective film (3) are plated with metal layers (7); and the metal layer (7) on the inner surface is connected with the metal electrode (6) on the front face of the piezoelectric vibrator (2), and the metal layer (7) on the side face is connected with the metal shell (1).
Owner:大连世有电力科技有限公司
Metal particle detection sensor based on high-frequency high-gradient magnetic field and detection method thereof
ActiveCN112881244AEasy to detectIncrease the amount of flux changeMagnetic field measurement using flux-gate principleMagnetic field measurement using galvano-magnetic devicesMagnetic polesMechanical equipment
The invention relates to the field of mechanical equipment condition monitoring, in particular to a metal particle detection sensor based on a high-frequency high-gradient magnetic field and a detection method thereof. The sensor comprises a sensor shell assembly, a magnetic field loop assembly and an oil pipe detection assembly. The sensor shell assembly comprises a shell, a first pipe connector and a second pipe connector, a through hole is formed in the side face of the shell, and the first pipe connector and the second pipe connector are arranged at through hole openings in the two sides of the shell respectively. The oil pipe detection assembly is located in the center of the shell and comprises an induction coil and an oil pipe, the oil pipe is located in an inner cavity of the sensor, the two ends of the oil pipe are connected with the first pipe connector and the second pipe connector in an embedded mode respectively, a groove is formed in the outer side of the pipe wall of the oil pipe, and the induction coil is wound in the oil pipe groove. The magnetic field loop assembly is located on the outer surface of the induction coil and comprises a first tank-shaped magnetic pole, a second tank-shaped magnetic pole and an excitation coil.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Wireless tire pressure monitor system
InactiveUS20100097203A1High hit ratioRaise the ratioTyre measurementsAntenna detailsTire-pressure monitoring systemPressure sensor
A wireless tire pressure monitor system has multiple pressure sensors and at least one receiving module. The pressure sensors detect tire pressures and transmit wireless signals representing the tire pressure. The at least one receiving module is mounted on a chassis of a vehicle at a geometric center of the pressure sensors and has an annular antenna. The annular antenna receives wireless signals from the pressure sensors equally. Therefore, because distances between the receiving module and the pressure sensors are the same and the annular antenna has good receiving characteristics, the wireless tire pressure monitor system has a high hit ratio for receiving wireless signals.
Owner:TUNG THIH ELECTRONICS
Magnetoelectric rotating speed sensor suitable for large-spacing measurement
ActiveCN110940827AIncrease the output signal amplitudeFacilitate subsequent signal processingSpeed/acceleration/shock instrument detailsDevices using electric/magnetic meansMagnetoEngineering
The invention relates to a magnetoelectric rotating speed sensor suitable for large-spacing measurement. The magnetoelectric rotating speed sensor comprises an armature framework, an enameled wire coil, a shell, an insulating sleeve, an insulating spacer, a lead, a connector and a shaft end bolt embedded with a permanent magnet, wherein the armature framework, the enameled wire coil, the insulating sleeve and the insulating gasket are assembled into an assembly, the assembly is installed inside the shell, the enameled wire coil and the connector are connected through a lead, and after connection is completed, potting is performed and the connector is fixed to the shell to form a magneto-electric rotating speed sensor sensitive assembly, the shaft end bolt is installed on a rotating shaft to be measured, periodic magnetic field changes are formed through the permanent magnet, and the assembly is installed in the magnetic field change range, so that the enameled wire coil generates sinusoidal alternating current signals, and then the alternating current is periodically converted into revolutions. The magnetoelectric rotating speed sensor has the advantages that large-spacing non-contact measurement between the sensor and the rotating shaft can be realized, the output amplitude is large, and the vibration resistance is strong.
Owner:BEIJING RES INST OF TELEMETRY +1
In-phase AC (Alternating Current) signal amplification type grid driving system based on constant-current protection
InactiveCN104918376AReduce power consumptionShort startup timeElectric light circuit arrangementNOR gateAlternating current
The invention discloses an in-phase alternating-current signal amplifying type gate drive system based on a logic protection emitter-coupled type. The in-phase alternating-current signal amplifying type gate drive system is mainly composed of a drive chip M, a self-locking optical excitation circuit, a drive circuit connected with the drive chip M and an in-phase alternating-current signal amplifying circuit arranged between the drive chip M and the self-locking optical excitation circuit. The in-phase alternating-current signal amplifying type gate drive system is characterized in that a logic protection emitter-coupled circuit is further connected between the output end of a NOR gate IC2 and the negative electrode output end of a NOR gate IC3 in series. According to the in-phase alternating-current signal amplifying type gate drive system, the relevant function of the drive chip M can be automatically excited according to external illumination condition, an extra starting device is not needed, and therefore the in-phase alternating-current signal amplifying type gate drive system is quite low in power consumption.
Owner:CHENGDU CHUANGTU TECH
Laser self-mixing multi-dimensional measuring device and method based on triangular wave current modulation
InactiveCN102955043AAccurate Non-Contact MeasurementSimple structureFluid speed measurementBeam splitterSignal processing circuits
The invention provides a laser self-mixing multi-dimensional measuring device and method based on triangular wave current modulation. The laser self-mixing multi-dimensional measuring device comprises a laser device, optical fibers, an optical fiber beam splitter, an optical fiber focuser, a photoelectric detector and a signal processing circuit. A laser self-mixing sensing system comprises a plurality of paths of different optical path structures with the triangular wave current modulation, and a band-pass filtering signal processing circuit; and the multi-dimensional speed size and direction can be accurately measured on line by virtue of the single laser device and the single detector. The laser self-mixing multi-dimensional measuring device provided by the invention has the advantages of simple structure, easiness in adjustment, low cost and high space resolution, effectively expands a speed sensing method based on a laser self-mixing effect, and particularly provides a reliable solution scheme for non-contact online monitoring on the three-dimensional motion speed of a long-distance object.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Boosting dual-filter type gate driving system for blue light-emitting diode (LED) lamp
InactiveCN104936348AReduce power consumptionPrevent external electromagnetic interferenceElectric light circuit arrangementPower conversion systemsOvervoltageCapacitance
The invention discloses a novel gate drive system for blue LED lamps. The novel gate drive system mainly comprises a transformer T, a driver chip M, a switching current source, a diode D1, a capacitor C3, a resistor R7 and a transistor Q4, wherein the switching current source is serially connected between a VCC pin and an INP pin of the driver chip M, the diode D1 is serially connected between the VCC pin and a BOOST pin of the driver chip M, the capacitor C3 is serially connected between the BOOST pin and a TG pin of the driver chip M, the resistor R7 is serially connected between the TG pin and a TS pin of the driver chip M, a base electrode of the transistor Q4 is connected with the TG pin of the driver chip M, a collecting electrode of the transistor Q4 is grounded after passing by a capacitor C4 and a capacitor C5 sequentially, and an emitting electrode of the transistor Q4 is grounded. The novel gate drive system for the blue LED lamps has the functions of short-circuit protection, overvoltage protection and open-circuit protection and is low in power consumption, and starting time of the novel gate drive system is one fourth of that of a traditional gate drive circuit.
Owner:CHENGDU LEIKEER SCI & TECH
Logic protection emitter coupling-type three-filtering amplification large-size LED lamp protection system
InactiveCN104968079AReduce power consumptionPrevent external electromagnetic interferenceElectric light circuit arrangementEnergy saving control techniquesCapacitanceTransformer
The invention discloses an LED lamp protection system based on a logic protection emitter-coupled amplifying circuit, mainly composed of a transformer T, a driving chip M, a switching current source connected in series between a VCC pin and an INP pin of the driving chip M, a capacitor C3 connected in series between a BOOST pin and a TG pin of the driving chip M, a resistor R7 connected in series between the TG pin and a TS pin of the driving chip M, and a transistor Q4 of which the base is connected with the TG pin of the driving chip M, the collector is grounded sequentially through a capacitor C4 and a capacitor C5, and the emitter is grounded. The LED lamp protection system is characterized in that a logic protection emitter-coupled amplifying circuit is connected in series between the VCC pin and the BOOST pin of the driving chip M. The LED lamp protection system of the invention not only has the functions of short-circuit protection, over-voltage protection and open-circuit protection, but also has very low power consumption. Moreover, the starting time is only 1 / 4 of that of a traditional gate driving circuit.
Owner:CHENGDU LEIKEER SCI & TECH
Error compensation for sheathed sensors
ActiveUS20190145836A1Improve efficiencyPrevent external electromagnetic interferenceThermometer detailsResistance/reactance/impedenceObservational errorElectricity
A circuit for determining and / or compensating for a measurement error of a sheathed sensor due to a property of a sheath of that sheathed sensor comprises a first and a second terminal for connecting to a pair of sensor signal leads of a sensor element in a sheathed sensor and a voltage measurement circuit. A switching unit controls switching an electrical connection between a first and a second state. A correction measurement circuit generates a correction signal indicative of that a measured current running from the first terminal through the switching unit. A controller receives the measurement and correction signal in both the first and second state, and calculates an error value indicative of the measurement error and / or a sensor readout value that is corrected for the measurement error by taking the measurement and correction signal into account as obtained in both the first and second state.
Owner:MELEXIS TECH NV
Logic protection amplification type blue-light LED lamp protecting system
InactiveCN104411055AReduce power consumptionProtect power needsElectric light circuit arrangementEnergy saving control techniquesOvervoltageShort circuit protection
The invention discloses a logic protection amplification type blue-light LED lamp protecting system. The logic protection amplification type blue-light LED lamp protecting system mainly comprises a grid drive circuit, a logic control circuit, a power amplifier P1, a power amplifier P2, a pulse comparator U1, a pulse comparator U2, a field-effect transistor MOS1, a field-effect transistor MOS2, a field-effect transistor MOS3, a field-effect transistor MOS4 and an oscillator. The power amplifiers P1 and P2 and the pulse comparators U1 and U2 are connected with the logic control circuit; grids of the field-effect transistors MOS1, MOS2, MOS3 and MOS4 are connected with the grid drive circuit; the oscillator is connected in series between the cathode input end of the pulse comparator U1 and the cathode input end of the pulse comparator U2. The logic protection amplification type blue-light LED lamp protecting system is characterized in that a logic protection amplification circuit is also connected in series between the cathode input end of the pulse comparator U1 and the cathode input end of the pulse comparator U2. The logic protection amplification type blue-light LED lamp protecting system has functions of short-circuit protection, overvoltage protection and open circuit protection and has low power consumption which is one third of power consumption of a conventional protection circuit.
Owner:CHENGDU COPOO TECH
Multiplexed output voltage-stabilized source based blue light LED lamp protection system
InactiveCN104602395AReduce power consumptionAvoid external electromagnetic interferenceElectric light circuit arrangementShort circuit protectionCircuit protection
The invention discloses a multiplexed output voltage-stabilized source based blue light LED lamp protection system. The multiplexed output voltage-stabilized source based blue light LED lamp protection system mainly consists of a gate drive circuit and a logic control circuit and is characterized by further comprising a power amplifier P1, a power amplifier P2, a pulse comparer U1, a pulse comparer U2, a field-effect tube MOS1, a field-effect tube MOS2, a field-effect tube MOS3, a field-effect tube MOS4, an oscillator and the like, wherein the power amplifier P1 and the power amplifier P2 are connected with the logic control circuit, the pulse comparer U1 and the pulse comparer U2 are connected with the logic control circuit, gates of the field-effect tube MOS1, the field-effect tube MOS2, the field-effect tube MOS3 and the field-effect tube MOS4 are connected with the gate drive circuit, and the oscillator is connected between the negative pole input end of the pulse comparer U1 and the negative pole input end of the pulse comparer U2. The multiplexed output voltage-stabilized source based blue light LED lamp protection system has short-circuit protection, overvoltage protection and open circuit protection functions, and power consumption is low and is only 1 / 3 of the power consumption of a traditional protection circuit. In addition, the multiplexed output voltage-stabilized source based blue light LED lamp protection system is provided with a multiplexed output voltage-stabilized source, so that the electricity demand of the protection circuit can be ensured, external electromagnetic interference can be effectively avoided, and control flexibility and accuracy are improved.
Owner:CHENGDU ZHILIDA TECH
Dual-power amplification type filtering drain electrode drive system for blue-light LED lamp
InactiveCN104968080ASimple structureReduce power consumptionElectric light circuit arrangementCouplingLight beam
Owner:CHENGDU LEIKEER SCI & TECH
Intelligent control system for building facilities
InactiveCN107544320APrevent external electromagnetic interferenceProgramme controlComputer controlPacket lossPower cable
The invention discloses an intelligent control system for building facilities. The intelligent control system for building facilities comprises a central control computer, a gateway and a light modulator, and the central control computer is connected to a gateway through a cable. The intelligent control system for building facilities is characterized in that the intelligent control system of the invention also comprises couplers and a power cable; the couplers are arranged in the light modulator and the gateway; two ends of the power cable are connected to the coupler in the light modulator and the coupler inside the gateway; and the power cables are two 24V non-polar power cables. The intelligent control system adopts two 24V non-polar signal cables as transmission medium to transmit sinewave signals in order to effectively avoid external electromagnetic interference, prevent data packet loss and messed orders. Meanwhile, the adoption of the 24V non-polar signal cable can break a limitation on a transmission distance of a traditional RS485 bus, and thus the intelligent control system can be arranged into multiple structures like a bus type structure, a tree-shaped structure, a star-shaped structure, etc,. and requirements of restaurant in different scales can be fully satisfied.
Owner:永林电子(上海)有限公司
Gate drive system based on logic protection amplifying circuit
InactiveCN104411056AReduce power consumptionPrevent external electromagnetic interferenceElectric light circuit arrangementEnergy saving control techniquesOvervoltageCapacitance
The invention discloses a gate drive system based on a logic protection amplifying circuit. The gate drive system mainly comprises a switch current source, a transformer T, a drive chip M, a diode D1, a capacitor C3 and a resistor R7, wherein the diode D1 is serially connected between a VCC pin and a BOOST pin of the drive chip M, the capacitor C3 is serially connected between the BOOST pin and a TG pin of the drive chip M, and the resistor R7 is serially connected between the TG pin and a TS pin of the drive chip M. The gate drive system is characterized in that the logic protection amplifying circuit is serially connected between the drive chip M and a switch power amplifying circuit. The gate drive system has the advantages that functions of short circuit protection, overvoltage protection and open circuit protection are realized, low power consumption is achieved, and starting time of the gate drive system is only 1 / 4 of that of a traditional gate drive circuit; moreover, owing to the switch power amplifying circuit, power signals inputted into the drive chip M can be guaranteed against attenuation so as to guarantee integral performance stability.
Owner:CHENGDU COPOO TECH
Alternating-current signal amplification type gate drive system based on half-bridge controlled drive circuit
InactiveCN104978927AReduce power consumptionShort startup timeStatic indicating devicesEngineeringAlternating current
The invention discloses an in-phase alternating current signal amplification type optical excitation grid drive circuit mainly composed of a drive chip M, a self-locking optical excitation circuit and a drive circuit, and the drive circuit is connected with the drive chip M. The in-phase alternating current signal amplification type optical excitation grid drive circuit is characterized in that an in-phase alternating current signal amplification circuit is connected between the drive chip M and the self-locking optical excitation circuit in series; the in-phase alternating current signal amplification circuit is composed of a power amplifier P, a resistor R4, a resistor R5 and the like, one end of the resistor R4 is connected with a VCC pin of the drive chip M, the other end of the resistor R4 is connected with the positive electrode input end of the power amplifier P, one end of the resistor R5 is connected with the negative electrode input end of the power amplifier P, and the other end of the resistor R5 is connected with the self-locking optical excitation circuit. The related functions of the drive chip M are automatically excited according to external light conditions, additional starting devices do not need to be added, and therefore the power consumption of the drive circuit is reduced.
Owner:CHENGDU JIESHENG TECH CO LTD
Optical image anti-shake device with yoke
ActiveUS10394044B2High magnetic retentivityEnhanced magnetic forceTelevision system detailsColor television detailsCamera lensOptical axis
An optical image anti-shake device with a yoke is provided. The optical image anti-shake device includes: a casing having a first aperture; a fixing portion having a bottom plate, the bottom plate having a second aperture corresponding in position to the first aperture; and an active portion enclosed by the casing and resiliently clamped between the casing and the bottom plate by the fixing portion, the active portion including: a correcting module for correcting, with a magnetic force, a blur of images caused by a shake of the optical image anti-shake device; a frame having a receiving space; a lens holder disposed in the receiving space of the frame; a lens unit corresponding in position to the first aperture and the second aperture, the lens unit being carried by the lens holder and having an image-capturing optical axis; and a yoke fixed to the frame.
Owner:TDK TAIWAN
MEMS microphone and electronic device
InactiveCN111757230AImprove performanceImprove shielding effectMicrophonesLoudspeakersElectromagnetic interferenceEngineering
The invention discloses an MEMS microphone and an electronic device. The MEMS microphone comprises a shell and a sensor chip arranged in the shell, wherein the shell comprises a shielding piece, a shell body with an open end, a bottom plate arranged at the open end of the shell body and a first shielding layer arranged on the outer surface of the shell body, a sound hole is formed in the shell body, the shielding piece covers the sound hole, and a through hole communicated with the sound hole is formed in the shielding piece. Therefore, comprehensive shielding protection can be formed for internal components such as the sensor chip in the shell through the first shielding layer and the shielding piece, so external electromagnetic interference is prevented.
Owner:WEIFANG GOERTEK MICROELECTRONICS CO LTD
Roller sensor
PendingCN112537707AExtended service lifePrevent external electromagnetic interferenceElevatorsElectrical and Electronics engineeringMechanical engineering
The invention discloses a roller sensor. The roller sensor comprises a roller and a supporting shaft; a first end of the supporting shaft is connected with the roller through a bearing; a second end is a mounting end; a circuit board is fixedly arranged on the end face of the first end of the supporting shaft; a magnetic encoder is integrated on the circuit board; a cover plate is hermetically andfixedly arranged on the end face, extending out of the first end of the supporting shaft, of the roller; a magnetic body opposite to the magnetic encoder is arranged at one side, facing the first endof the supporting shaft, of the cover plate; and a to-be-measured moving object drives the roller to move, so that the magnetic body moves relative to the magnetic encoder, and measurement is achieved. According to the roller sensor, the roller serves as a transmission medium and makes contact with the to-be-measured moving object or the roller is installed on the moving measured object through asupport, relative rotation is generated between the magnetic body and the magnetic encoder, and the measurement of parameters such as the rotating speed, the displacement, the acceleration and deceleration speed and the vibration is achieved through relative rotation. Therefore, the service life of the magnetic encoder and the circuit board thereof is prolonged, and the roller sensor is simple instructure, convenient to install and suitable for various measurement occasions.
Owner:HANGZHOU HUNING ELEVATOR PARTS CO LTD
Double-filtering amplification-type hybrid grid drive system
InactiveCN104968083AReduce power consumptionShort startup timeElectric light circuit arrangementEnergy saving control techniquesHybrid typeDriver circuit
Owner:CHENGDU LEIKEER SCI & TECH
Emitter coupled asymmetrical logic protection triggering system
InactiveCN104467743AThe overall structure is simpleEasy to make and useElectric pulse generatorPhysicsElectromagnetic interference
The invention discloses an emitter coupled asymmetrical logic protection triggering system. The system is mainly composed of an emitter coupled asymmetrical circuit, a passive pi type filtering circuit, and a light beam excitation logic amplifying circuit connected between the emitter coupled asymmetrical circuit and the passive pi type filtering circuit in series. The system is characterized in that the light beam excitation logic amplifying circuit is mainly composed of a power amplifier P1, a NAND gate IC1, a NAND gate IC2, a NAND gate IC3, a polar capacitor C6, a resistor R9 and a polar capacitor C8 and the like, the negative electrode of the polar capacitor C6 is connected with the positive electrode input end of the power amplifier P1, the positive electrode of the polar capacitor C6 is grounded through a light emitting diode D1, one end of the resistor R9 is connected with the positive electrode of the polar capacitor C6, the other end of the resistor R9 is grounded through a diode D2, and the positive electrode of the polar capacitor C8 is connected with the point where the resistor R9 is connected with the diode D2. The system is simple in overall structure and quite convenient to manufacture and use. Meanwhile, the system is stable in performance, capable of effectively overcoming external electromagnetic interference and capable of effectively preventing current break.
Owner:CHENGDU CHUANGTU TECH
Grid driving system used for LED lamp protection system based on boost voltage stabilizing circuit
InactiveCN104968088AReduce power consumptionPrevent external electromagnetic interferenceElectric light circuit arrangementCapacitanceStart time
The invention discloses a grid drive system for an LED lamp protection system. The grid drive system is characterized by mainly comprising a transformer T, a drive chip M, a switchable current source connected between a VCC pin and an INP pin of the drive chip M in series, a diode D1 connected between the VCC pin and a BOOST pin of the drive chip M in series, a capacitor C3 connected between the BOOST pin and a TG pin of the drive chip M in series, a resistor R7 connected between the TG pin and a TS pin of the drive chip M in series, and a transistor Q4, wherein the base of the transistor Q4 is connected with the TG pin of the drive chip M, the collector of the transistor Q4 is grounded after passing through a capacitor C4 and a capacitor C5, and the emitter of the transistor Q4 is grounded. The grid drive system for the LED lamp protection system not only has the short circuit protection, over-voltage protection and open circuit protection functions, but also is low in power consumption, and the starting time of the system is only one fourth that of a traditional grid drive circuit.
Owner:成都威邦科技有限公司
Blue-LED lamp nonlinear drain electrode drive system based on logic protection amplifying circuit
InactiveCN104470109ASimple structureReduce power consumptionElectric light circuit arrangementEnergy saving control techniquesElectromagnetic pulseControl switch
The invention discloses a Blue-LED lamp nonlinear drain electrode drive system based on a logic protection amplifying circuit. The blue-LED lamp nonlinear drain electrode drive system is mainly composed of a voltage-distributing switching circuit, a control switching circuit, a nonlinear triggering circuit and a power amplifying circuit, wherein the control switching circuit is connected with the output end of the voltage-distributing switching circuit, the nonlinear triggering circuit is arranged at the output end of the control switching circuit, and the power amplifying circuit is arranged at the output end of the nonlinear triggering circuit. The blue-LED lamp nonlinear drain electrode drive system based on the logic protection amplifying circuit is characterized in that the logic protection amplifying circuit is further connected between the nonlinear triggering circuit and the power amplifying circuit in series. According to the Blue-LED lamp nonlinear drain electrode drive system based on the logic protection amplifying circuit, the nonlinear triggering circuit and the power amplifying circuit are creatively used together, the nonlinearity of the nonlinear triggering circuit can be guaranteed, a safe and reliable triggering voltage can be also provided for the power amplifying circuit, the interference of electromagnetic pulse can be remarkably reduced, and the stable performance of the power amplifying circuit can be guaranteed.
Owner:CHENGDU COPOO TECH
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