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48results about How to "Achieve optical isolation" patented technology
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Uninterruptible power source monitoring device
ActiveCN101694945ARealize monitoringWill not affect stable operationBatteries circuit arrangementsElectric powerEngineeringOptical coupling
The invention claims an uninterruptible power source (UPS) monitoring device integrated to a communication apparatus, which comprises a central processing unit (CPU), an input / output circuit and a connection interface. The connection interface is used for providing an interface connected with a UPS power source; the input / output circuit comprises an optocoupler which is used for obtaining an alarm signal of the UPS through the connection interface, carrying out optical coupling isolation and outputting the alarm signal to the CPU, and controlling the UPS according to a control command sent by the CPU; and the CPU is shared by the communication apparatus and used for receiving and processing the alarm signal of the UPS to generate the control command and sending the control command to the output circuit. The uninterruptible power source monitoring device has favorable popularity, low cost, simple control, stability and reliability.
Owner:ZTE CORP
Silicon on insulator (SOI)-based opto-isolator based on symmetrical vertical grating coupling structure
The invention discloses a silicon on insulator (SOI)-based opto-isolator based on a symmetrical vertical grating coupling structure. The structure comprises a vertical coupling grating, two mode converters which are manufactured on two sides of the vertical coupling grating respectively to realize approximately loss-free energy transmission and mode conversion, two single-mode ridge waveguides which are connected with one ends of the two mode converters respectively, and an optical beam combiner which is connected with the other ends of the two single-mode ridge waveguides respectively, wherein the vertical coupling grating, the two mode converters, the two single-mode ridge waveguides and the optical beam combiner are manufactured on one substrate. The opto-isolator has the advantages of integration of coupling and optical isolation functions, simplicity in alignment, low insertion loss and compatibility of a manufacturing process and a complementary metal oxide semiconductor (CMOS) process, and is expected to be applied to a future on-chip / inter-chip optical interconnection network.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Photoelectric AC/DC voltage transducer based on Pockels effect
InactiveCN105203828AResponse bandwidthHigh measurement accuracyCurrent/voltage measurementMeasurement pointPolarizer
The invention belongs to the technical field of electric power detection and provides a photoelectric AC / DC voltage transducer based on the Pockels effect. The photoelectric AC / DC voltage transducer is not affected by environment temperature change, measurement precision is high, signal transmission is convenient, safety performance is high, power supply is not needed at a measurement point, and optical fiber signal transmission is immune to electromagnetic interference. The photoelectric AC / DC voltage transducer comprises a laser source, a transducer component, transmission fiber, a photoelectric detector and a backward-stage signal processing system, wherein the transducer component comprises a laser collimator I, a polarizer, a 1 / 4 wave plate, a crystal, an analyzer and a laser collimator II which are arranged along an optical path in sequence, the crystal is a cuboid, the length direction of the crystal is the light passing direction, the upper surface and the lower surface, perpendicular to the light passing direction, of the crystal are plated with metal layers serving as detection electrodes, the metal layers are used for loading voltage to be measured, the voltage direction is perpendicular to the light passing direction, and the backward-stage signal processing system obtains the voltage to be measured through a signal output by the photoelectric detector.
Owner:CHONGQING UNIV
High-sensitivity MEMS photoelectric galvanometer, making and detecting method thereof
ActiveCN1844937AAchieve optical isolationEasy to detectCurrent/voltage measurementWeak currentEngineering
The invention relates to an optical electric galvanometer, based on Micro-Electronic Mechanic System (MEMS). It is characterized in that: it use micro mechanical technique to prepare the screw coil MEMS torsion micro lens; it can avoid amplify circuit, that directly inputting the tested current or low-frequency weak current into driving coil, to be arranged in the strong magnetic field generated by external permanent magnet; the driving coil drives the micro lens to deflect from original position by the torque generated by Lorentz force; it uses dual optical fiber collimator to test the characters that sensitive to the angle; according to the relationship between the optical signal loss and the torsion angle, via optical electric conversion and signal processing, attaining the current value. The invention can avoid amplify circuit at the input end, to attain amp level and pF level, to overcome the defects of noise disturb and excursion when amplifying the micro weak current signal. And it can realize the optical electric separation at input and output ends synchronously, with small volume, simple structure, lower cost and better anti-vibration ability.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Magnetic field sensor based on silicon-based micro-ring resonator and preparation method of magnetic field sensor
ActiveCN110018428ASmall sizePromote the development of photoelectric sensingSingle device manufacturingDielectricElectromagnetic interference
The invention discloses a magnetic field sensor based on a silicon-based micro-ring resonator. The magnetic field sensor comprises a silicon substrate, a silicon dioxide layer, a direct waveguide, a ring waveguide and a magneto-optic film. By applying an external magnetic field outside the magneto-optic film, the dielectric constant of a magneto-optic material is changed, an output harmonic peak of the magnetic field sensor based on the silicon-based micro-ring resonator drifts, and magnetic field measurement is realized. The magnetic field sensor has the characteristics of high stability, size miniaturization, high electromagnetic interference resisting ability and low manufacturing cost.
Owner:CHONGQING UNIV
Capacitive voltage transformer transient response test device and test method thereof
InactiveCN108051769AEnsure safetyImprove test efficiencyElectrical measurementsData acquisitionEngineering
The invention provides a capacitive voltage transformer transient response test device and a test method thereof. The test device comprise a circuit breaker, a voltage transformer, a phase selection opening and closing controller, a data acquisition photoelectric conversion module, a host computer and a measurement and control module. The circuit breaker, the voltage transformer and a tested capacitive voltage transformer are all connected in parallel with a test transformer. The host computer and measurement and control module are in communication connection with the data acquisition photoelectric conversion module. The data acquisition photoelectric conversion module is in communication connection with the phase selection opening and closing controller. The phase selection opening and closing controller is in communication connection with the circuit breaker. The voltage transformer is connected with the data acquisition photoelectric conversion module and the phase selection openingand closing controller. The data acquisition photoelectric conversion module is connected with the tested capacitive voltage transformer. The test device realizes a full-automatic quick test and greatly improves the test efficiency. In addition, by means of photoelectric isolation, a tester can perform tests in a control room far away from a high-voltage area to ensure the safety.
Owner:CHINA XD ELECTRIC CO LTD +1
Safe ignition circuit with short-circuit safety function
The invention discloses a safe ignition circuit with a short-circuit safety function, and relates to the technical field of safety control over conventional ammunition electronic fuses, missile rocketprojectiles, electric detonators in the industrial and mining field and other electric initiating explosive devices, and electronic circuits. By adding voltage-dividing, shunting, discharge and anti-interference elements in the ignition circuit of an electric initiating explosive device and designing a logic circuit based on low-cost normally closed and normally open optical relays, the ignitioncircuit has the functions of controlling the charging and discharging of an ignition capacitor, controlling the safety of an ignition switch, controlling the short circuit of the electric initiating explosive device, removing and restoring insurance and the like, so that the output side of the optical relay can meet the ignition and detonation conditions of the electric initiating explosive deviceonly by acting according to a time sequence according to a control signal, and the electronic circuit replaces a mechanical short circuit switch, thereby simplifying and reducing the structure of anignition device, preventing the accidental ignition of the electric initiating explosive device and finally forming the high-performance electric control safe ignition circuit with light weight, smallsize, reliable safety and quick unlocking.
Owner:ZHONGBEI UNIV
Methd for preparing monocrystalline silicon nano membrane for nano photon technique
InactiveCN1710152AEnough thicknessAchieve optical isolationPolycrystalline material growthSingle crystal growth detailsNano siliconNanometre
The invention discloses a production technique of single crystal silicon nano film for nanometer photon technology. After clean and bake the insulator upper silicon plate of thickness of several to hundreds nanometer, joint the basal plate with one side of top layer silicon while removing the bottom silicon layer, acquiring single crystal silicon nano film. Single crystal silicon nano film produced with above technique has various thickness from several to hundreds nanometer, with a highly uniform thickness. There is enough thickness for light insulation on the lower light restrain layer and it is available for nano silicon photon device develop. According to actual needs the joint face of the silicon plate can take pre-process such as electrode placing or specified figure drawing.
Owner:ZHEJIANG UNIV
Control system for oil filter
InactiveCN102866651APrevent arc interferenceEasy to useProgramme controlComputer controlMicrocontrollerControl system
The invention belongs to the field of mechanical equipment and particularly relates to a control system of an oil filter. The invention provides the control system of the oil filter, which occupies a small space and has high automation degree. The control system of the oil filter comprises a singlechip, an opening and closing module, a conversion module, a temperature sensor, a pressure sensor and a peripheral circuit; an input port of the opening and closing module is connected with an output port of the singlechip; the temperature sensor and the pressure sensor are connected with the singlechip by a converter; and a port of the peripheral circuit is connected with a port of the singlechip.
Owner:赵岩
Integrated weak light triggering gas switch circuit based on transformer and working method thereof
PendingCN110943725AEasy to control trigger momentReduce volumeElectronic switchingPhysicsPhotoconductive switch
The invention discloses an integrated weak light triggering gas switch circuit based on a transformer, and a working method thereof. The circuit comprises a gas switch, a transformer, a photoconductive switch, a divider resistor and a trigger capacitor, the high-voltage electrode of the gas switch is connected with the divider resistor, the ground electrode of the gas switch is grounded, and the trigger electrode of the gas switch is connected with the secondary side of the transformer; one terminal of the primary side of the transformer is connected with one end of the photoconductive switch,and the other end of the photoconductive switch is connected with the divider resistor and the trigger capacitor. And the other terminal of the primary side of the transformer is connected with the trigger capacitor and grounded. According to the invention, micro-focus low-energy laser triggering, triggering control and high voltage can be adopted to realize photoelectric isolation; optical fibers are used for transmitting trigger light energy, complex collimation, light alignment and other operations are omitted, and the trigger moment is easy to control. The trigger loop directly obtains the voltage and the energy required by the trigger system from the main loop or the gas switch electric field, and a charging power supply does not need to be additionally arranged.
Owner:INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
Power cable partial discharge sensing and detecting device
InactiveCN111025101AEnsure safetyAchieve optical isolationTesting using optic methodsTesting vessel constructionLine sensorPower cable
The invention relates to a power cable partial discharge sensing and detecting device which comprises copper foil electrodes, a connecting wire, a sensor, a leading-out optical fiber, a wrapping mold,a photoelectric conversion module, a signal amplification module, a filtering module and a data acquisition and storage module, and the copper foil electrodes are connected with the sensor; electricsignals detected by the two copper foil electrodes are transmitted to the sensor to be converted into optical signals, and the optical signals are led out through the leading-out optical fiber; the leading-out optical fiber transmits an optical signal passing through the sensor to the photoelectric conversion module; the photoelectric conversion module converts an optical signal transmitted by theoptical fiber into an electric signal; the signal amplification module amplifies the electric signal with relatively weak signal intensity; the filtering module filters out low-frequency signals in the electric signals; and the data acquisition and storage module acquires and stores the processed partial discharge data. The method has the advantages of safety, strong anti-interference capability,high precision and the like.
Owner:GUANGDONG POWER GRID CO LTD +1
Built-in partial discharge detecting device of high voltage cable and mounting method thereof
PendingCN110082659AImprove accuracyEnsure safetyTesting using optic methodsElectricityAudio power amplifier
The invention provides a built-in partial discharge detecting device of a high voltage cable. The built-in partial discharge detecting device comprises an electrode, a fiber sensor, an extraction fiber, a photoelectric conversion module, an amplifier, a filter and a signal detecting module. The electrode is fixedly disposed on a semiconductive layer of a cable body. One end of the fiber sensor isconnected to the electrode and other end of the fiber sensor is connected to the input terminal of the photoelectric conversion module through the extraction fiber; and the output terminal of the photoelectric conversion module is electrically connected to the amplifier, the filter and the signal detecting module in sequence. In addition, the invention also proposes a mounting method thereof. Thefiber sensor collects a discharge signal of the cable through the electrode; the collected electrical signal is converted into an optical signal for transmission; the optical signal is transmitted tothe photoelectric conversion module through the extraction fiber to convert the optical signal into an electrical signal again; and then the electric signal is amplified and filtered by the amplifierand the filter in turn and then the processed signal is inputted into the signal detecting module to carry out partial discharge signal detection processing.
Owner:GUANGDONG POWER GRID CO LTD +1
Serial port expanding circuit of dynamic management and control system and working method of serial port expanding circuit
PendingCN108304339AAchieve isolationReduce loadElectric digital data processingTotal factory controlAnti jammingControl system
The invention provides a serial port expanding circuit of a dynamic management and control system. The serial port expanding circuit is electrically connected to RXD, TXD and I / O ports of a microprocessor. The serial port expanding circuit is characterized by being composed of an analog switch chip, a decoder chip, multiple first level switching circuits and multiple second level switching circuits, and expanding of input and output ports of the microprocessor is achieved; the first level switching circuits achieve switching of RS232 levels to TTL levels; the second level switching circuits achieve switching of the TTL levels to the RS232 levels. The invention further discloses a working method of the serial port expanding circuit. The working method involves expanding of TXD and expandingof RXD. By means of the serial port expanding circuit, expanding of the RXD and TXD ports of the microprocessor can be effectively achieved, and optocouplers are utilized to achieve switching of theTTL and RS232 levels; not only are signals reliably transmitted, but also the load capability can be improved; the serial port expanding circuit achieves optoelectronic isolation, is resistant to impact, and improves the anti-jamming performance of circuit expanding.
Owner:NANTONG VOCATIONAL COLLEGE
Magnetic cycloning device of spherical wave
ActiveCN1713007AAchieve optical isolationPrecise rotation of polarization directionPolarising elementsHomogeneous magnetic fieldCondensed matter physics
A magnetooptical component of spherical wave consists of magnetooptical glass body, lens and uniform magnetic field generator which are prepared by magnetooptical material. It is featured as setting magnetooptical glass body in magnetic field generated by uniform magnetic field generator, making end surface of said glass body to be planar form and sticking lens on end surface of it.
Owner:陕西光电子先导院科技有限公司
Laser-triggered megavolt-level low-inductance gas switch
InactiveCN108448380AAvoid technical problems of insulation protectionAchieve optical isolationSpark gaps with auxillary triggeringLow inductanceElectric field distortion
To solve the technical problems that a laser triggering switch single-channel discharge inductance is relatively large and electrical pulse-triggered gas switch project implementation difficulty is high, and an insulation failure is easy to occur, the invention provides a laser-triggered megavolt-level low-inductance gas switch. A pretriggering gap breakdown process of the switch is triggered by laser, photoelectric isolation is realized, and the technical problems of electrical pulse triggering introduction and triggering system insulation protection are avoided; and a main gap is of a fielddistortion three-electrode structure, after discal part potential reversal of electrodes is triggered, discharge is induced due to strong electric field distortion, and thus a plurality of discharge channels are formed, thereby reducing switch inductance, and prolonging the life of the switch.
Owner:NORTHWEST INST OF NUCLEAR TECH
All-optical circuit voltage measurement system and method based on inverse piezoelectric effect and fiber grating
ActiveCN106841748BPassiveImprove anti-electromagnetic interference performanceCurrent/voltage measurementGratingResponse Frequency
The invention discloses an all-light-path voltage measuring system based on an inverse piezoelectric effect and fiber bragg grafting. The system comprises a broadband laser light source, a voltage transducer reference unit, a voltage transducer sensing unit, a transmission optical fiber, a photoelectric detector, and a tail end signal displaying and processing system; laser sends a photosignal to an input end of the voltage transducer reference unit through the transmission optical fiber, and the input end of the voltage transducer reference unit is connected to the voltage transducer sensing unit; an externally-arranged voltage is arranged on the voltage transducer sensing unit; the voltage transducer sensing unit outputs a light intensity signal carrying signal information of a voltage to be detected; the light intensity signal is input to the photoelectric detector; the photoelectric detector converts the output light intensity signal into a voltage signal, and the voltage signal generates a numerical value of the detected externally-arranged voltage through the tail end signal displaying and processing system. The invention further discloses an all-light-path voltage measuring method based on the inverse piezoelectric effect and the fiber bragg grafting. The provided all-light-path voltage measuring system based on the inverse piezoelectric effect and fiber bragg grafting has the advantages of being passive, strong in capacity of resisting electromagnetic interference, wide in response frequency band, and good in power frequency response.
Owner:CHONGQING UNIV
Method and device for measuring propeller rotating speed of underwater direct current brushless thruster
ActiveCN102735869AImprove anti-interference abilitySmall error in speed measurementLinear/angular speed measurementAnalog signalTransformation unit
The invention provides a method and a device for measuring the propeller rotating speed of an underwater direct current brushless thruster. The device comprises an analog signal isolating unit, a digital signal photoelectric isolating unit, a frequency / voltage (F / V) conversion unit, a digital to analog conversion unit and a computer acquisition and computation unit, wherein a rotating speed digital pulse signal which is output by the direct current brushless thruster is subjected to analog signal isolation and photoelectric isolation and then converted into a rotating speed digital pulse signal of 0 to 5 V; the rotating speed digital pulse signal of 0 to 5 V is subjected to F / V conversion, and an analog voltage signal is output; the analog voltage signal is converted into digital quantity and further converted into a voltage value; the voltage value is subjected to V / F conversion, and the frequency of the rotating speed digital pulse signal is obtained; and the propeller rotating speed of the direct current brushless thruster is obtained by frequency / rotating speed conversion. The invention has the advantages of high anti-interference capacity and small in speed-measuring errors, analog signal and digital signal photoelectric isolation between a rotating speed measuring device and the direct current brushless thruster is realized, and the operation reliability of the direct current brushless thruster and the operation reliability of the measuring device are ensured.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Intelligent distribution transformer
ActiveCN105375842ARealize the function of intelligent capacity regulation and pressure regulationAchieve optical isolationTesting dielectric strengthConversion without intermediate conversion to dcPower flowDistribution transformer
The invention discloses an intelligent distribution transformer, solving the problem that the current transformer state information cannot be transmitted. The intelligent distribution transformer is characterized in that: the box cover of the distribution transformer 1 is provided with an on-load capacity regulation and voltage regulation tap switch 2 and an intelligent liquid level temperature sensor 3; the on-load capacity regulation and voltage regulation tap switch is connected to a device for online monitoring current and voltage of the distribution transformer consisting of a power distribution box, a full optical fiber current mutual inductor, an optical voltage mutual inductor and a combined unit. The intelligent distribution transformer precisely measures current and voltage on the secondary side of the power distribution transformer, returns the feedback to the on-load capacity regulation and voltage regulation tap switch, enables the on-load capacity regulation and voltage regulation tap switch to perform switching between the big capacity and the small capacity according to the change in the load and determines that whether the operation state of the transformer is faulted according to the temperature and the liquid level signal, promptly gives the feedback to the industrial control system and realizes the intelligent regulation of voltage and capacity.
Owner:HUAIBEI POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER +1
Direct current motor braking device and method with controllable constant current and falling speed
ActiveCN110071664AImprove general performanceMeets Industrial Reliability RequirementsDc motor stoppersLoop controlClosed loop
The invention discloses a direct current motor braking device with controllable constant current and falling speed, and relates to the technical field of motor application. The power field effect transistor replaces a conventional dynamic braking resistor, and the equivalent resistance between the drain and the source of the power field effect transistor is adjusted in real time in a voltage control mode to realize the constant-current parking braking of the motor, so that the braking time is shortened to be less than 68 percent of that of the conventional dynamic braking mode. Under the condition of not changing hardware, the intelligent continuous control of the motor braking current and the potential energy load falling speed is realized by adopting a current and rotating speed two-stage closed-loop control technology and a digital signal processor. In order to increase the reliability of the control system, an optical isolator with double optical couplers as cores is designed and used for reliably isolating analog signals between a control stage and a power stage. The invention can realize the braking at the highest speed in the motor dragging process and the continuous regulation control of the falling speed of the potential energy load.
Owner:LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
Contact type high-voltage electrical equipment temperature detection system
InactiveCN103728044AAchieve optical isolationRealize electromagnetic interference shieldingThermometers using electric/magnetic elementsUsing electrical meansLight sourceContact type
The invention discloses a contact type high-voltage electrical equipment temperature detection system and relates to temperature signal collecting and processing. A temperature measuring module is provided with a temperature sensor, a waveform generator, an electronic-to-optical conversing input port and a solar panel; a signal processing module is provided with an optical-to-electronic conversing output port, an operational amplifier, a voltage comparator, a single chip microcomputer and a display screen; an energy light source module is provided with a paraboloidal mirror, a metal halide and a power source; an output end of the temperature sensor is connected with an input end of the waveform generator; an output end of the waveform generator is connected with the electronic-to-optical conversing input port; an output end of the solar penal is connected with the waveform generator; an output end of the electronic-to-optical conversing input port is connected with the optical-to-electronic conversing output port through fiber optics bundles; an output end of the optical-to-electronic conversing output port is connected with an input end of the operational amplifier; an output end of the operational amplifier is connected with an input end of the voltage comparer; an output end of the voltage comparer is connected with an input port of the single chip microcomputer; an output port of the single chip microcomputer is connected with an input end of the display screen; the power source is connected with the metal halide; the metal halide irradiates the solar panel through fiber optics bundles which are formed through the paraboloidal mirror.
Owner:XIAMEN UNIV
Optical fiber isolated dry contact output circuit device
InactiveCN105391283AAddressing vulnerability to distractionsRapid responsePower conversion systemsWeak currentEngineering
The invention discloses an optical fiber isolated dry contact output circuit device, and belongs to the technical field of a converter. The optical fiber isolated dry contact output circuit device comprises an optical fiber receiving circuit, a shaping and inverting circuit, a triode amplification output circuit, a relay control circuit and a signal lamp indicating circuit. The optical fiber receiving circuit is connected with the shaping and inverting circuit. The shaping and inverting circuit is connected with the triode amplification output circuit. The triode amplification output circuit is connected with the relay control circuit and the signal lamp indicating circuit, and provides a DC channel when a triode is conducted. The relay control circuit and the signal lamp indicating circuit are connected through DC voltage of +5V. The invention is advantageous in that the problem that the signal is susceptible to interference is solved, and the signal can be transmitted through a great distance. Quick response can be made, and the purposes of photoelectric isolation and the weak current control of a high current by using a relay can be achieved.
Owner:AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
Multi-probe leakage detecting device for efficient filter
InactiveCN105080241AImprove scanning leak detection efficiencyGuaranteed synchronicityDispersed particle filtrationComputational physicsParticle counter
The invention relates to a multi-probe leakage detecting device for an efficient filter. The device comprises an upstream sampling probe, a downstream sampling probe group, a particle counter group, a particle counter synchronous acquisition card and an industrial control computer. In a work process of the device, the downstream sampling probe group is driven by a two-dimensional scanning mechanism to scan in the downstream of a detected filter at a constant speed; the particle counter synchronously acquisition card uploads particle counting acquired by all the particle counters in real time according to a predetermined sampling interval and sampling number of times to the industrial control computer; the industrial control computer processes data in real time to obtain transmissivity of points of the detected filter so as to judge whether the detected efficient filter has leakage points or not and the specific coordinates of the leakage points. The device can be used for quickly and effectively scanning the detected filter to detect leakages, thereby providing a basic guarantee for batched online detection of the efficient filter.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI +1
High voltage line temperature sensor
InactiveCN107328491AReduce lossAchieve optical isolationThermometer detailsThermometer applicationsComputational physicsEnergy depletion
The invention discloses a high voltage line temperature sensor comprising a temperature measurement module used for sensing a temperature signal and converting the temperature signal into an electric signal, a single-chip microcomputer connected with the temperature measurement module and used for controlling a lighting device to illuminate according to the electric single, and a fiber arranged on the lighting device and used for receiving an optical signal from the lighting device; the fiber is connected with a host fiber port so as to transmit the optical signal to the host; the temperature sensor can timely determine whether the cable has faults or not, and workers can fast determine a line fault section according to local alarm conditions, thus finding the fault points; in addition, the fiber can transmit the collected signals, thus realizing optoelectronic isolations, and effectively solving the insulation problems; the energy loss in a signal transmission process is small, and the signal transmission is not affected by external environments.
Owner:ZHEJIANG DAYOU IND CO LTD HANGZHOU SCI TECH DEV BRANCH CO +2
Fiber-isolated analog output circuit apparatus
InactiveCN105375747AAddressing vulnerability to distractionsAchieve optical isolationFrequency-independant attenuatorsPower conversion systemsFiberUltrasound attenuation
The invention discloses a fiber-isolated analog output circuit apparatus, and belongs to the technical field of a current transformer. The apparatus comprises a fiber receiving circuit, a shaping and reversing circuit, a second-order filter circuit, an attenuation compensation circuit, a voltage offset circuit and a quadruple amplification circuit, wherein the fiber receiving circuit and the shaping and reversing circuit are connected, the shaping and reversing circuit is connected with the second-order filter circuit, the second-order filter circuit is connected with the attenuation compensation circuit, the attenuation compensation circuit is connected with the voltage offset circuit, and the voltage offset circuit is connected with the quadruple amplification circuit. The apparatus provided by the invention has the following advantages: signals are transmitted through light, the problem of easy interference of signals is solved, and the signals can be transmitted over a further distance.
Owner:AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
High-sensitivity MEMS photoelectric galvanometer, making and detecting method thereof
ActiveCN1844937BAchieve optical isolationEasy to detectCurrent/voltage measurementWeak currentOpto electronic
The invention relates to an optical electric galvanometer, based on Micro-Electronic Mechanic System (MEMS). It is characterized in that: it use micro mechanical technique to prepare the screw coil MEMS torsion micro lens; it can avoid amplify circuit, that directly inputting the tested current or low-frequency weak current into driving coil, to be arranged in the strong magnetic field generated by external permanent magnet; the driving coil drives the micro lens to deflect from original position by the torque generated by Lorentz force; it uses dual optical fiber collimator to test the characters that sensitive to the angle; according to the relationship between the optical signal loss and the torsion angle, via optical electric conversion and signal processing, attaining the current value. The invention can avoid amplify circuit at the input end, to attain amp level and pF level, to overcome the defects of noise disturb and excursion when amplifying the micro weak current signal. Andit can realize the optical electric separation at input and output ends synchronously, with small volume, simple structure, lower cost and better anti-vibration ability.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Infrared induction LED light bar without dark region and open hole
PendingCN110542032AIncrease spacingAchieve Optical IsolationElectric circuit arrangementsLight fasteningsEngineeringLED lamp
The invention discloses an infrared induction LED light bar without a dark region and an open hole. The LED light bar comprises a lampshade, wherein a control panel is arranged at one side in the lampshade, two ends of the control panel are an infrared transmitting end and an infrared receiving end respectively, an LED mainboard is arranged at the other side in the lampshade, the control panel andthe LED mainboard are partially overlapped to form an overlapping region, and a hole is made between the infrared transmitting end and the infrared receiving end to expose a bead of an illumination LED. According to the infrared induction LED light bar, by increasing infrared transmitting and receiving spacing, optical isolation is realized, it is needless to open a hole in the lampshade, and theinfrared transmitting end and the infrared receiving end are exposed out of the lampshade; and besides, by means of making the hole in the control panel, partially overlapping the control panel and the LED mainboard and exposing the LED bead, the outer surface of the lampshade is free of the dark region, it can be guaranteed that sufficient spacing is available for infrared transmitting and receiving, and an illumination region of the illumination LED is not influenced.
Owner:阮胜锋
Magnetic cycloning device of spherical wave
ActiveCN100349025CAchieve optical isolationPrecise rotation of polarization directionPolarising elementsHomogeneous magnetic fieldCondensed matter physics
Owner:陕西光电子先导院科技有限公司
A fiber-isolated analog output circuit device
InactiveCN105375747BAddressing vulnerability to distractionsAchieve optical isolationFrequency-independant attenuatorsPower conversion systemsFiberUltrasound attenuation
Owner:AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
Shunting anti-crowding turnout automatic control device and turnout anti-crowding locomotive self-stop system
InactiveCN102756746BPrevent fork accidentPrevent the turnout from being crushedSignal boxes station blockingAutomatic controlEngineering
Owner:合肥安迅铁道应用技术有限公司
A dynamic electrical stress applying device and testing method for a power semiconductor device
ActiveCN111426927BImprove the efficiency of reliability testingDegradation parameter monitoringIndividual semiconductor device testingTest powerPower semiconductor device
The invention relates to a dynamic electrical stress application device for power semiconductor devices, comprising: a signal generator, an optocoupler protection module, a gate pulse drive module, a high-voltage control module and the n measured power semiconductor devices, wherein the signal generation The device, the optocoupler protection module, and the gate pulse drive module are sequentially connected to the gates of the n power semiconductor devices under test, and the high voltage control module is connected to the drains of the n power semiconductor devices under test. The source stages of the n tested power semiconductor devices are grounded. The invention also relates to a dynamic electrical stress test method for a power semiconductor device. The invention can simultaneously complete the application of dynamic electrical stress to one or more power semiconductor devices under test, realizes the photoelectric isolation between the signal generator and the high-voltage circuit through the optocoupler protection module, and facilitates the monitoring of the degradation parameters of the power semiconductor devices under test , improving the efficiency of hot-carrier reliability testing under dynamic electrical stress conditions.
Owner:SOUTHEAST UNIV +1
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