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40results about How to "Achieve the purpose of measurement" patented technology
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Binocular vision measuring method
InactiveCN105043350AHigh speedImage matching is simplePicture interpretationLinear relationshipThree dimensional measurement
Owner:MINJIANG UNIV +1
Communication system implementing link measurement and its link measuring method
InactiveCN101321095ALow internal overheadAchieve the purpose of measurementData switching networksCommunications systemNetwork management
The invention discloses a communication system that realizes link measurement and link measurement method thereof. The link measurement method includes the steps of: configuring a probing message by an access node, parsing the probing message to obtain a piece of single link probing data and report it to a network management back stage or send the probing message to the access node. The access node parses the sent probing message to obtain a piece of double link probing data and report it to a network management back stage; the network management back stage obtains the link state information in real time according to received single link probing data and double link probing data. The measurement method of the invention based on an active measurement technology analyzes inner link quality problem in the signaling message in the system and positions the problem rapidly in the system, which improves problem screening efficiency.
Owner:ZTE CORP
Device and method for measuring geometric parameter of superplastic non-spherical free bulge
InactiveCN101650156AAccess to information without contactHigh measurement accuracyUsing optical meansPhysicsCamera lens
The invention relates to a device and a method suitable for measuring a geometric parameter of a superplastic non-spherical free bulge in a superplastic non-spherical free bulge experiment and also suitable for measuring a shape change geometric parameter of an axisymmetric rotating curved surface. The device comprises a measured bulging part, an annular light source, a video camera, a PC machineand an adjustable holder, wherein the annular light source is coaxial with a lens of the video camera and is positioned between the measured bulging part and the video camera; the annular light sourceand the video camera are arranged on the adjustable holder; and the PC machine controls the video camera to continuously acquire images of the measured bulging part and processes the acquired imagesto measure and calculate the geometric parameter of the measured bulging part. Compared with other measuring methods, the measuring method takes the measured bulging part images as information carriers and extract available information by analyzing and processing the measured bulging part images, thereby achieving the purpose of measurement; in addition, the invention has the advantages of non-contact, abundant obtained information, high measuring precision and measuring speed and the like; and the invention can realize on-line real-time measurement.
Owner:JILIN UNIV
Device for measuring current density of arc column of welding arc
InactiveCN102363234AAchieve the purpose of measurementSimple structureArc welding apparatusShunt DeviceContinuous measurement
The invention discloses a device for measuring the current density of an arc column of a welding arc. The device comprises two anode plates which are separated, wherein cooling water channels are formed in the two anode plates; grooves are formed at the joints of the two anode plates respectively; the inner wall of each groove is provided with an insulating layer; a tungsten probe is clamped in the two grooves of the two anode plates; and a part of the tungsten probe extending out of the lower sides of the anode plates is connected with a current divider through a lead-out lead. In the invention, two water-cooled copper polar plates are provided with semi-cylindrical grooves, Al2O3 plasma coatings are coated in the grooves, the tungsten probe is clamped between the two water-cooled copper polar plates, a lead is connected below the probe, and the probe is connected to a welding power supply after being connected with the current divider; and during measurement, a motor is used for driving a lead screw to rotate, the lead screw is used for driving a slide block and a welding gun to move horizontally, and an electric arc and the probe move relatively, so that the aim of measuring is fulfilled. Due to the adoption of the device, the current density of the arc column of the welding arc can be measured continuously, and the radial distribution condition of the current density along with the arc column of the electric arc can be obtained; and the device has a simple structure and high result accuracy.
Owner:XI AN JIAOTONG UNIV
Radiant panel thermometer detection apparatus and method for continuous annealing furnace
InactiveCN101487745AThe problem of realizing offline calibrationSolve difficult problems that cannot be achieved simultaneouslyThermometer detailsThermometers using electric/magnetic elementsFiberDisplay device
The invention, belonging to the technical field of temperature measurement, discloses a device for detecting a panel thermometer of a continuous annealing furnace and a method thereof. The invention primarily comprises that: pore passages communicated with each other are arranged at the bottom of the annealing furnace and in a refractory layer of the furnace bottom, an outer casing is mounted on the inner wall of the pore passages, a thermocouple and a display device are arranged; an inner protective casing is mounted in the outer casing, high-temperature refractory fibers are filled between the inner casing and outer protective casing, the temperature-measuring thermocouple is arranged in the inner protective casing, the parts of the inner protective casing, the outer casing and the temperature-measuring thermocouple stretching out of the furnace are totally arranged in the hermetic closure of a stretchable corrugated pipe. When the radiant panel thermometer is checked, a hand wheel at the bottom of a connecting rod is rotated to move the connecting rod upwards, so as to push the inner protective casing, the outer casing and the temperature-measuring thermocouple into the position near band steels in the furnace chamber, thus realizing the measurement of the panel temperature; according to the temperature of the band steels measured by the temperature-measuring thermocouple, the radiant panel thermometer is checked in combination with the panel temperature shown by the radiant panel thermometer to obtain correct radiation coefficient. The invention is accurate in measurement, simple in structure and convenient in operation and use.
Owner:CISDI ENG CO LTD
Non-contact space curve precision measurement method and device
InactiveCN106123780AAchieve the purpose of measurementCompletely non-contact measurementUsing optical meansMeasurement pointComputer science
The invention discloses a non-contact space curve precision measurement method and device, wherein the method includes: determining a measurement point; obtaining the distance d from the measurement point to the starting point i of the line to be measured i and the angle information of the i-th point; the initial value of i here is 1; obtain the distance d from the measurement point to the next point i+1 of the line to be measured i+1 and the i+1th point angle information, the point should be very close to the previous point; according to the difference between the i+1th point angle information and the i+1th point angle information to determine the relative rotation angle α i , by the formula Calculate the approximate length from point i to point i+1; repeat the above process, accumulate i while continuously measuring, until the end point of the line to be measured, n is equal to the final value of i continuously accumulated, and then pass l=l 1 +l 2 +…+l n Determine the length of the line to be tested. Through the embodiment of the invention, complete non-contact measurement can be achieved, the measurement can be performed at a place far from the measurement object, and the purpose of measuring the curved surface can be achieved.
Owner:BEIJING JIAOTONG UNIV
Calibrator for calibrating revolution meter of diesel engine
InactiveCN102539837AVerification accuracyVerify reliabilityTesting/calibration of speed/acceleration/shock measurement devicesFrequency changerMotor drive
The invention provides a calibrator for calibrating a revolution meter of a diesel engine. A microprocessor is connected with a frequency converter via an RS485 interface circuit, the frequency converter is connected with an alternating-current motor, the alternating-current motor is in driving connection with a simulator of the diesel engine, a signal end of the simulator of the diesel engine is connected with the microprocessor, and the microprocessor is respectively connected with a display circuit and a keyboard circuit via interface circuits. The microprocessor is communicated with the frequency converter via the RS485 interface circuit so as to set the frequency of output revolution speed, accurate output of the frequency converter controls the alternating-current motor to generate stable revolution speed, the alternating-current motor drives oil spraying of the simulator of the diesel engine to generate a vibration signal on a wall of an oil spraying tube, the tested meter is clamped on the wall of the oil spraying tube so that the revolution speed of the meter is measured, and accuracy and reliability of the meter are checked.
Owner:苏州工业园区广福汽保机电设备有限公司
Laser range finder
ActiveCN104849718AAchieve the purpose of measurementAvoid negative effectsElectromagnetic wave reradiationLaser rangingPath switching
The invention relates to a laser range finder. The laser range finder comprises an emission optical system. The emission optical system comprises a collimator. An emission light path on which the collimator is arranged is provided with a first refraction plate used for generating an inner light path so as to realize sampling, and an inner light path optical fiber used for receiving the inner light path. An inner and outer light path switching device is arranged between the emission light path and the inner light path. The inner and outer light path switching device blocks the emission light path and conducts the inner light path, so that the purpose of inner light path measuring is achieved; when the inner light path is blocked, the emission light path is conducted, so that the purpose of outer light path measuring is realized. By adopting the structure, the negative influences of axial endplay of an inner light path motor shaft to measuring precision in the prior art are avoided.
Owner:CHANGZHOU XINRUIDE INSTR
Water solution system local corrosion speed online electrochemistrical monitoring probe
InactiveCN1464296AAchieve the purpose of measurementMeet production needsUsing mechanical meansMaterial analysisMeasuring instrumentElectrochemistry
The present invention relates to metal corrosion protecting technology, and is especially in-situ electrochemical monitoring probe for local corrosion rate in water solution system. The electrochemical monitoring probe is a two-electrode system comprising front cap, filtering film, closed anode area, anode, sealed joint, cathode and tail tube. The anode is held inside a notch in the sealed joint and the anode area is formed between the filtering film and the surface of the anode. The cathode is one cylinder with relatively small ends and has one effective cathode surface area on the surface. The anode and the cathode are connected via wires to outer measuring instrument. The front cap end and side wall have small hole canals communicated with the filtering film. The present invention is suitable for monitoring and detection of local corrosion rate in water solution system.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Cylinder face photometric measurement device
The invention belongs to the field of photometric measurement and relates to a cylinder face photometric measurement device used for measuring the distribution rule of the emergence light intensity and the emergence light angle of a light source or a refraction and reflection material. Emergence light in all directions in space is collected through the inner wall of a cylinder face light screen, and the emergence light intensity reflects the irradiated brightness of the cylinder face light screen. The brightness irradiated by the emergence light of the inner wall of the cylinder face light screen is measured through a fisheye camera, the angle corresponding to the emergence light is obtained through image coordinates according to the fisheye camera coordinate conversion relation, and therefore the distribution rule of emergence light intensity and the emergence light angle is established. Compared with a traditional method, emergence light intensity data within the emergence light angle in the 180-degree semispherical range can be measured at the same time, the data volume obtained through one-time measurement is large, efficiency is high, and the interference from the environment is low. Meanwhile, the measurement device has the advantages of being simple and easy to machine and low in cost.
Owner:UNIV OF SCI & TECH BEIJING
laser range finder
ActiveCN104849718BAchieve the purpose of measurementAvoid negative effectsElectromagnetic wave reradiationLaser rangingPath switching
The invention relates to a laser range finder. The laser range finder comprises an emission optical system. The emission optical system comprises a collimator. An emission light path on which the collimator is arranged is provided with a first refraction plate used for generating an inner light path so as to realize sampling, and an inner light path optical fiber used for receiving the inner light path. An inner and outer light path switching device is arranged between the emission light path and the inner light path. The inner and outer light path switching device blocks the emission light path and conducts the inner light path, so that the purpose of inner light path measuring is achieved; when the inner light path is blocked, the emission light path is conducted, so that the purpose of outer light path measuring is realized. By adopting the structure, the negative influences of axial endplay of an inner light path motor shaft to measuring precision in the prior art are avoided.
Owner:CHANGZHOU XINRUIDE INSTR
Power semiconductor device for testing gate pole current
ActiveCN112067877AGuaranteed equivalenceMeet stray inductanceSemiconductor/solid-state device testing/measurementSemiconductor/solid-state device detailsPower semiconductor deviceSemiconductor chip
The invention discloses a power semiconductor device for testing a gate pole current. The device comprises a power semiconductor chip and a tube shell. The power semiconductor chip comprises a plurality of first insulating layers and a plurality of sub gate pole annular electrodes; the first insulating layers divide a gate pole common metal region of the power semiconductor chip into a plurality of sub gate pole common metal regions, and the plurality of sub gate pole common metal regions are connected with the plurality of sub gate pole annular electrodes in a one-to-one correspondence manner; the tube shell comprises a plurality of sub gate pole contact rings and a plurality of sub-insulating seat inner metal rings, and the sub gate pole contact rings and the sub insulating seat inner metal rings are arranged with the plurality of sub gate pole annular electrodes in a one-to-one correspondence manner; and a plurality of square grooves are formed in a cathode copper block on the outerside of a tube shell gate pole groove, and gate pole leading-out strips are arranged in the square grooves so as to lead out gate pole currents on the corresponding sub gate pole annular electrodes respectively. The power semiconductor device can effectively lead out gate pole currents of different cathode strip-shaped areas in the power semiconductor chip so as to achieve a purpose of measurement.
Owner:TSINGHUA UNIV
Detector employing plastic scintillator to measure alpha and beta rays
PendingCN108459341ALess energy loss in transmissionReduce lossesX/gamma/cosmic radiation measurmentAviationNuclear radiation
The invention relates to a detector employing a plastic scintillator to measure alpha and beta rays, belongs to the field of a nuclear radiation detector and solves problems of low alpha and beta surface pollution efficiency and small measurement area existing in a plastic scintillator. The detector comprises a detector top cover, an aviation plug, a detector casing, a light guide and plastic flash, a photomultiplier tube and a photomultiplier tube socket, wherein the light guide and plastic flash is fixed at the center position of a detector casing chamber, the photomultiplier tube socket anda multi-core signal wire are welded on a signal processing circuit board, a bottom end of the photomultiplier tube is plugged on the photomultiplier tube socket, a top end of the photomultiplier tubeis glued at the side surface of the light guide and plastic flash through optical adhesive, the signal processing circuit board is arranged on an inner bottom surface of the detector casing, a positioning column is screwed on the detector casing, a foot pad is fixed at a top portion of the positioning column, a film frame is arranged on an incident surface at a top portion of the detector casing,and the detector top cover is arranged on the film frame. The detector is advantaged in that surface pollution efficiency is high, and the measurement area is large.
Owner:SHANXI ZHONGFU NUCLEAR INSTR CO LTD
Current measurement equipment and current measurement system
ActiveCN112505388AEliminate voltage signalAchieve the purpose of measurementCurrent measurements onlyVoltage/current isolationElectrical conductorElectric power equipment
The invention discloses current measurement equipment and a current measurement system, and relates to the technical field of power equipment. The current measurement equipment is used for measuring ahigh-frequency current superimposed in a power frequency current of power equipment. The power equipment comprises a current-carrying conductor. The current measurement equipment comprises a first Rogowski coil, a second Rogowski coil and a resistor assembly connected between the first Rogowski coil and the second Rogowski coil in series. The first Rogowski coil comprises a high-frequency magnetic core, and the second Rogowski coil comprises a low-frequency magnetic core. When the current-carrying conductor is sleeved with the first Rogowski coil and the second Rogowski coil, a first inducedvoltage induced in the first Rogowski coil by the power frequency current in the current-carrying conductor and a second induced voltage induced in the second Rogowski coil by the power frequency current in the current-carrying conductor are equal in size, and the first induced voltage and the second induced voltage are opposite in direction. According to the current measurement equipment and thecurrent measurement system, the current measurement flexibility of the power equipment can be improved.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +1
Track speed detecting device of tracked vehicle
PendingCN107310642AAchieve the purpose of measurementAvoid interferenceEndless track vehiclesDevices using electric/magnetic meansEngineeringComputer engineering
The invention relates to the technical field of speed detecting of a tracked vehicle, in particular to a track speed detecting device of the tracked vehicle. The track speed detecting device comprises encoder mounting brackets, encoder protecting hoods, connecting bolts, encoder connectors, encoders and limiting screws, wherein each encoder protecting hood is welded to the bottom of the corresponding encoder mounting bracket; each connecting bolt is used for being connected with a tracked vehicle rotating shaft; each encoder connector is welded to a nut of the corresponding connecting bolt; each encoder mounting hole is formed in the center of corresponding encoder connector; each limiting hole is formed in the outer side of the corresponding encoder connector; a circular hole is formed in the center of the side edge of each encoder protecting hood; three fixing threaded holes are formed in the periphery of each circular hole; after penetrating through the corresponding circular hole, a center rotating shaft of each encoder is inserted in the corresponding encoder mounting hole, and is fixed from the corresponding limiting hole through the corresponding limiting screw; and a housing of each encoder is fixed from the corresponding fixing threaded hole through the corresponding fixing screw. According to the track speed detecting device disclosed by the invention, the mechanical connection of the encoders and the tracked vehicle rotating shaft is adopted, so that the track speed is accurately detected.
Owner:NANJING AGRI MECHANIZATION INST MIN OF AGRI
A long-necked automatic telescopic measuring rod
InactiveCN106403887BFreely adjust the amount of expansion and contractionSimple appearanceHeight/levelling measurementEngineeringFree expansion
Owner:KUNMING SURVEY & DESIGN INST OF STATE FORESTRY ADMINISTRATION +1
Metal pipe bending machine
The invention relates to the field of bending machines, in particular to a metal pipe bending machine. The metal pipe bending machine comprises a bending machine main body, a fixing mechanism is installed on one side of the front face of the bending machine main body, a recovering mechanism and a winding mechanism are installed on the other side of the front face of the bending machine main body,the recovering mechanism is located above the winding mechanism and is in transmission connection with the winding mechanism, a power line is fixedly connected to the other side of the front face of the bending machine main body, the middle of the power line is wound on the winding mechanism, one end of the power line installation plug is clamped on the fixing mechanism, a supporting block is fixedly connected to one side of the upper end of the bending machine main body, and a first containing groove is formed in the end of the supporting block. According to the bending machine main body, thebending machine main body is provided with the winding mechanism and the fixing mechanism, during use, the power line can be wound on a winding disc of the winding mechanism, a bottom plate and a pressing plate of the fixing mechanism are used for clamping the power line, the redundant part of the power line is fixed to the bending machine main body, and the situation that the power line is cut by sharp objects on the ground when dragged on the ground is avoided.
Owner:程群
Aircraft wing horizontal measurement device convenient to disassemble and assemble
ActiveCN110926419AQuick and easy leveling workAchieve the purpose of measurementMechanical measuring arrangementsIncline measurementRotary stageMeasurement device
The invention relates to an aircraft wing horizontal measurement device convenient to disassemble and assemble. The device comprises a fixed base, a magnet block is embedded in the lower part of the fixed base; threaded grooves are formed in the upper portion of the fixed base. A mounting plate is fixedly connected to the top of the rotary table, a containing groove is formed in the middle of themounting plate, the lower portion of the mounting plate is sleeved with a pin shaft, a leveling instrument is mounted on the pin shaft and can rotate around the pin shaft, a clamping plate is hinged to one side of the front end of the mounting plate, and a clamping groove is fixedly formed in the other side of the front end of the mounting plate. The clamping plate is placed in the clamping groovefor ensuring a fact that the leveling instrument does not rotate out of the containing groove when measurement is not performed. The device is further provided with a supporting rod, and when the leveling instrument rotates around the pin shaft to be close to the horizontal state, the leveling instrument is supported below the leveling instrument through the supporting rod to accurately find thehorizontal position of the leveling instrument. The device is convenient to disassemble and assemble, good in flexibility and convenient to store and use.
Owner:SHENYANG AEROSPACE UNIVERSITY
Wind measurement method of wind measuring tower and wind shadow resistant wind measuring tower
ActiveCN108152533BCapable of measuring wind directionAccurate measurementIndication/recording movementEngineeringTower
Owner:北京唐浩电力工程技术研究有限公司
Device and method for measuring geometric parameter of superplastic non-spherical free bulge
InactiveCN101650156BAchieve the purpose of measurementFull accessUsing optical meansCamera lensMachine control
The invention relates to a device and a method suitable for measuring a geometric parameter of a superplastic non-spherical free bulge in a superplastic non-spherical free bulge experiment and also suitable for measuring a shape change geometric parameter of an axisymmetric rotating curved surface. The device comprises a measured bulging part, an annular light source, a video camera, a PC machineand an adjustable holder, wherein the annular light source is coaxial with a lens of the video camera and is positioned between the measured bulging part and the video camera; the annular light source and the video camera are arranged on the adjustable holder; and the PC machine controls the video camera to continuously acquire images of the measured bulging part and processes the acquired imagesto measure and calculate the geometric parameter of the measured bulging part. Compared with other measuring methods, the measuring method takes the measured bulging part images as information carriers and extract available information by analyzing and processing the measured bulging part images, thereby achieving the purpose of measurement; in addition, the invention has the advantages of non-contact, abundant obtained information, high measuring precision and measuring speed and the like; and the invention can realize on-line real-time measurement.
Owner:JILIN UNIV
Power line transmission time delay measurement method and device resistant to electric appliance interference and storage medium
ActiveCN114124157ATo achieve the purpose of propagation delay measurementAchieve the purpose of measurementPower distribution line transmissionLine-transmission monitoring/testingMean square error matrixElectrical resistance and conductance
The invention discloses an electric appliance interference resistant power line transmission time delay measurement method and device and a storage medium, and belongs to the field of time delay measurement, and the method comprises the following steps: S1, changing the resistance value of a resistor at a receiving end, obtaining n groups of different input end voltage-current ratios, selecting an initial value, and setting a precision requirement; s2, calculating a mean square error matrix for time delay estimation according to the initial value, judging whether the modulus of the mean square error matrix is smaller than the set precision or not, if the modulus of the mean square error matrix is smaller than the set precision, obtaining an optimal solution and carrying out a step S4, and otherwise, carrying out a step S3; s3, determining a linear search direction according to the mean square error matrix, updating the initial value, and repeating the step S2 by using the updated initial value; and S4, obtaining an output time delay value according to parameters extracted from the optimal solution. On the premise of not influencing the work of a power grid, the online end-to-end transmission time delay measurement which resists the interference of electric appliances and is high in precision, small in size and low in cost can be realized.
Owner:CHINA GRIDCOM +2
A miniature optical module for multi-channel distributed optical fiber temperature sensing system
ActiveCN103487167BHighly integratedReduce volumeThermometer detailsThermometers using physical/chemical changesBandpass filteringEngineering
Owner:武汉六九传感科技有限公司
Packaging piece production equipment capable of adjusting size self
ActiveCN109823632APrevent big gainsSimple organizationPackagingBiochemical engineeringBatch production
The invention discloses packaging piece production equipment capable of adjusting the size self. The packaging piece production equipment comprises a shearing device and a height measuring cavity arranged in the shearing device; the height measuring cavity is internally provided with a height measuring mechanism; and the height measuring mechanism comprises a measuring block and an unloading connecting block, can automatically detect the height of a product to be detected and feeds a height value of the product through the unloading connecting block. The device is simple in mechanism and simple and convenient to use, can be used for processing a packaging piece by utilizing the height of the product needing to be packaged, can prevent the size of the packaging piece from being too large ortoo small, saves materials and can achieve the maximum benefit. By adopting the packaging piece production equipment, through one sensing block, the purpose of measurement is achieved by contact between the sensing block and the product, and the height of the product is recorded, so that batch production and processing can be realized.
Owner:淮北市思朗包装印刷有限公司
Device and method for simultaneously measuring components and flow of methane
ActiveCN103454344BSimple solutionAchieve the purpose of measurementMaterial analysis using sonic/ultrasonic/infrasonic wavesVolume/mass flow by thermal effectsEffective solutionUltrasonic sensor
The invention relates to a device and a method for simultaneously measuring components and flow of methane. The method comprises the following steps: controlling an output signal of an amplifying circuit through an automatic gain circuit, identifying that whether a gas to be measured is air or methane through judging the relative size of an ultrasonic signal, if the gas to be measured is the methane, measuring the sound velocity of the methane through an ultrasonic sensor, measuring the temperature of the methane through a temperature measuring unit, calculating the volume concentration of CO2 gas in the methane by using a mixed gas characteristic equation, calculating the volume concentration of vapor by using a relation between the temperature and saturated vapor pressure, finally obtaining a volume concentration of CH4 gas, and measuring the flow of the methane through measuring a time difference between fair current and adverse current of the ultrasonic signal. According to the method, through treating signals measured by one temperature sensor and one ultrasonic sensor, the components and the flow of the methane can be measured, and an effective solution is provided for low-cost requirement in methane industrial application.
Owner:WUHAN CUBIC OPTOELECTRONICS
A size self-adjusting package production equipment
ActiveCN109823632BPrevent big gainsSimple organizationPackagingFast measurementMechanical engineering
The invention discloses a size self-adjusting package production equipment, which comprises a shearing device and a height measuring chamber arranged in the shearing device, a height measuring mechanism is arranged in the height measuring chamber, and the height measuring mechanism Including a measuring block and a blanking connection block, the height measuring mechanism can automatically detect the height of the product to be measured and feed back its height value through the blanking connection block; The height of the product can be used to process the package, which can prevent the size of the package from being too large or too small, save materials, and achieve the maximum benefit. This device uses a sensor that can move down to touch the product to achieve the purpose of measurement. , and record its height so that it can be mass-produced and processed.
Owner:淮北市思朗包装印刷有限公司
Current measuring devices and current measuring systems
ActiveCN112505388BEliminate voltage signalAchieve the purpose of measurementCurrent measurements onlyVoltage/current isolationElectrical conductorElectric power equipment
The application discloses a current measuring device and a current measuring system, which relate to the technical field of electric power equipment. The current measuring device is used to measure the high-frequency current superimposed in the power frequency current of the power equipment. The power equipment includes a current-carrying conductor. The current measuring device includes a first Rogowski coil, a second Rogowski coil, and The resistance assembly between the second Rogowski coils; the first Rogowski coil includes a high-frequency magnetic core, and the second Rogowski coil includes a low-frequency magnetic core. When the first Rogowski coil and the second Rogowski coil are sleeved on a current-carrying conductor, the The magnitude of the first induced voltage induced in the first Rogowski coil and the second induced voltage induced in the second Rogowski coil by the power frequency current in the current conductor are equal, and the directions of the first induced voltage and the second induced voltage on the contrary. The current measurement device and the current measurement system of the embodiments of the present application can improve the flexibility of current measurement of electric equipment.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +1
Rivet hole depth measuring method and measuring device
ActiveCN112097607AManual reading is convenient and quickElectricity environmental protectionMechanical depth measurementsUsing optical meansDisplay deviceMachine
The invention discloses a rivet hole depth measuring method and measuring device. The device comprises a machine body, wherein a displayer is fixedly connected to the top of the front face of the machine body, a metric and imperial system conversion button is installed in the middle of the machine body, a switch / zero setting button is installed on the left side of the front face of the machine body, and an INC / ABS button is installed on the right side of the front face of the machine body. A locking nut is connected to the right wall of the machine body in a penetrating mode, ruler frames arefixedly connected to the bottoms of the two walls of the machine body, a ruler body is connected to the top of the machine body in a penetrating mode, a depth measuring rod is fixedly connected to thebottom of the ruler body, magnetic pads are fixedly connected to the bottoms of the ruler frames, and a charging socket is formed in the top of the back face of the machine body. A storage battery isinstalled at the top of the front face of an inner cavity of the machine body, an infrared position sensor is fixedly connected to the top of the ruler body, a programmable editor is fixedly connected to the top of the infrared position sensor, a mercury tube is installed in an inner cavity of the depth measuring rod, and a movable block is fixedly connected to the bottom of the mercury tube.
Owner:CHINA LTD
Power supply analyzer and temperature compensation method thereof
PendingCN111707960AImprove accuracyAchieve the purpose of measurementTemperature compensation modificationPower supply testingData packThermodynamics
The invention provides a power supply analyzer and a temperature compensation method thereof, and relates to the technical field of power supply characteristic detection. The method comprises the steps: acquiring target data which comprise the environment temperature of an environment where a to-be-detected power supply is located and a current cold start current value of the to-be-detected powersupply; determining an adjustment coefficient of the current cold start current value based on the environment temperature; and determining a target cold start current value of the to-be-detected power supply by using the current cold start current value and an adjustment coefficient. Therefore, a technical problem of relatively low measurement accuracy of the cold start current of the power supply in the prior art is solved.
Owner:HANGZHOU XUNANDA ELECTRICAL APPLIANCES
Device for measuring high-voltage pulse power supply of xenon lamp of laser device
InactiveCN101718847BPrevents the output from fallingPrevents drop in op amp input voltagePower supply testingMeasurement using digital techniquesCapacitanceMeasurement device
Owner:郭亮
Explosion-proof device for lithium battery test
ActiveCN113543543AEasy to replaceSolve the problem that the size cannot be measuredCasings/cabinets/drawers detailsSupport structure mountingEngineeringStructural engineering
The invention discloses an explosion-proof device for a lithium battery test, which comprises a lithium battery test explosion-proof device, a placing plate, a protective shell, two limiting mechanisms, a lifting mechanism and an adjusting mechanism. The placing plate is located in the lithium battery test explosion-proof device, the protective shell is located at the top of the placing plate, and the two limiting mechanisms are respectively located at two sides of the protective shell. Through cooperative use of the protective shell, the lifting mechanism and the adjusting mechanism, the lithium battery can explode in the protective shell, the protective shell carries out preliminary protection, meanwhile, the protective shell has the advantage of being convenient to replace, the cost is low, and when the lithium battery expands, the lithium battery can push the lifting mechanism and the adjusting mechanism, so that a tester can conveniently observe outside the lithium battery test explosion-proof device, and the problems that the explosion-proof device is easily damaged due to explosion of the existing lithium battery and the size of the lithium battery cannot be measured when the lithium battery is expanded are solved.
Owner:ANHUI YUANDONGLI POWER SUPPLY CO LTD
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