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49results about How to "The test method is simple and reliable" patented technology
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Test method of fuel cell catalytic layer metal loads
ActiveCN103884729AThe test method is simple and reliableQuick checkMaterial analysis using wave/particle radiationFuel cellsTest response
The invention discloses a test method of fuel cell catalytic layer metal loads, and the method is as follows: (1) establishment of a standard curve, to be more specific, preparing more than three metal-element-containing catalysts with different loads on the surface of a substrate material according to a predetermined load, using an X-ray fluorescence spectrometer to test response signals of metal elements on the substrate material, using the ratio of response signals of the metal elements to response signals of a background sample as Y coordinates and the metal loads as X coordinates to draw the standard curve; (2) the catalytic layer load test, to be more specific, using the same background sample and same testing conditions of the standard curve test to test response signals of the metal and the background sample; and (3) the catalytic layer load calculation, to be more specific, establishing a metal load calculation formula according to the standard curve, and substituting test results into the formula to calculate the corresponding metal loads. Compared with the prior art, the test method is simple, reliable and fast without damage on a fuel cell catalyst layer.
Owner:中科嘉鸿(佛山市)新能源科技有限公司
Error calibration method of uniaxial north seeker
ActiveCN105509768ATroubleshooting Uncertain Angle RelationshipsGuaranteed error calibration accuracyMeasurement devicesDrift angleCarrier system
An error calibration method of an uniaxial north seeker comprises the following steps: firstly driving a rotary table to carry out four-position testing, and calibrating control drift angle between an instrument system and a carrier system of the uniaxial north seeker; then using the instrument system of the north seeker as a calibration coordinate system and controlling the rotary table to carry out corresponding position and rate testing; and finally finishing calculation of each error coefficient according to an error model of the uniaxial north seeker. The problem of indeterminate angle relation between the carrier system and the instrument system of the uniaxial north seeker is solved, and by the simple uniaxial north seeker's error compensation model and position and rate calibration method, error calibration of the uniaxial north seeker is realized. The calibration method is less time-consuming, has simple calculation and can be used to rapidly complete calibration test.
Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES
Test circuit and method for low-voltage physical model of unified power flow controller
ActiveCN103955141AAdequate test basisMeet the test verification requirementsSimulator controlTest powerTransient state
The invention relates to a test circuit and method for a low-voltage physical model of a unified power flow controller. The circuit comprises a test power circuit, a regulating transformer, a first bus, a third bus and a second bus, wherein the test power circuit, the regulating transformer, the first bus, the third bus and the second bus are sequentially connected. A phase-shifting device is arranged between the first bus and the second bus, and a bypass switch and a voltage disturbance generating device which are connected in parallel are arranged between the first bus and the third bus. A parallel transformer, a low-voltage physical model device of the unified power flow controller, a series transformer and an electric reactor are sequentially arranged between the third bus and the second bus, wherein the auxiliary side of the series transformer is connected with the third bus. According to the method, a steady state control policy, a transient state control policy and a dynamic control policy of the UPFC are verified by simulating various normal and fault working conditions of an electric power system. According to the technical scheme, the test method is simple and reliable, the various normal and fault working conditions of the electric power system cane be constructed, and the test verification requirements of the control policies of the UPFC are met.
Owner:STATE GRID CORP OF CHINA +1
Testing circuit of half-bridge-structure voltage source current converter and modulation method thereof
ActiveCN103954866AThe structure of the test device is simpleThe test method is simple and reliableElectrical testingCapacitanceCell controller
The invention relates to a testing circuit of a half-bridge-structure voltage source current converter and a modulation method of the testing circuit. The testing circuit comprises a testing power source circuit, a direct current power source, a half-bridge-structure voltage source current converter sub-module 1, an impedance load and a half-bridge-structure voltage source current converter sub-module 2. According to the modulation method, by setting the output voltage of the direct current power source, the voltage of a direct current bus meets the requirement, and a direct current side capacitor of the half-bridge-structure voltage source current converter is charged; after charging is stable, a circuit controller is controlled to output PWM pulse signals, and the half-bridge-structure voltage source current converter operates under different work conditions; by measuring the current and the voltage of the impedance load and simulating various faults of the half-bridge-structure voltage source current converter, the performance and stability of the half-bridge-structure voltage source current converter are checked. By constructing the various work conditions of the half-bridge-structure voltage source current converter, the experimental verification requirements of the design of the half-bridge-structure voltage source current converter and a unit controller control strategy are met.
Owner:STATE GRID CORP OF CHINA +1
BGA (ball grid array) welding point acceleration service life prediction method
ActiveCN104344988AGet Predicted LifespanThe test method is simple and reliableStrength propertiesAcceleration factorMechanical equipment
The invention relates to a BGA (ball grid array) welding point acceleration service life prediction method, which comprises the following steps that (a) n BGA welding point samples are randomly selected, wherein the n is greater than or equal to 5, and the BGA welding point samples are subjected to environment stress screening processing; (b) the samples processed in the step (a) are subjected to integral stress processing, and the integral stress processing comprises second temperature circulation processing, random vibration processing and electric stress processing on the samples processed in the step (a), and in addition, the sample failure time is recorded; (c) the samples processed in the step (b) are subjected to third temperature circulation processing; (d) a model shown in a formula (III) is used for calculating an acceleration factor, and finally, a formula (IV) is used for calculating the use average failure before time MTTR<use> for predicting the service life of the BGA welding point. The invention also provides application of the method to the preparation of electronic products and mechanical equipment.
Owner:ZHUZHOU CSR TIMES ELECTRIC CO LTD
Load spectrum testing method for excavator working device
ActiveCN106197801AGood reference valueImprove versatilityStructural/machines measurementApparatus for force/torque/work measurementHydraulic cylinderLoad time
The invention discloses a load spectrum testing method for an excavator working device. The method comprises the steps that firstly, displacement sensors and pressure sensors are arranged at all hydraulic cylinders of the excavator working device to obtain hydraulic cylinder telescopic amount data and hydraulic cylinder force data; then, cutting off is carried out on a bucket rod with a virtual plane, a disengagement body is obtained, the position of the gravity center of the disengagement body is calculated, a strain rosette is arranged on the part of the cut section on the bucket rod, the internal force component of the section is derived, the load time course of the tip of an excavator bucket is obtained through the section internal force according to the balance relation of force in combination with the structural size of the working device, and the load spectrum of the working device can be compiled with the load time course. The load spectrum obtained with the method includes the influence of the borne positive load in the excavating process, also includes the influences of eccentric loads and side loads, and coincides with the practical conditions better; the method is suitable for tests of load spectra of various excavator working devices and can also be used for load spectrum tests of other structures bearing movable load action.
Owner:CHANGAN UNIV
Test method and test device for asphalt pavement crack load response relative displacement
ActiveCN105527165AAccurately measure levelsAccurately measure vertical relative displacementMaterial strength using tensile/compressive forcesRelative displacementRoad surface
The invention discloses a test method and a test device for asphalt pavement crack load response relative displacement. The test method comprises steps as follows: a, a reference part and a sensor positioning part are arranged on two sides of a to-be-tested crack, and a horizontal linear displacement sensor and a vertical linear displacement sensor are fixedly arranged on the sensor positioning part; b, a test vehicle is stopped in positions of the reference part and the sensor positioning part in Step a; c, the sensors are started, the test vehicle slowly runs forwards and passes by the sensor positioning part and the reference part sequentially, after the test vehicle runs for a proper distance, the sensors are turned off, and the test is finished. The test device comprises the reference part, the sensor positioning part, the horizontal linear displacement sensor, the vertical linear displacement sensor and a controller. Compared with the prior art, the test method and the test device have the advantages that horizontal and vertical relative displacement between two plates of the crack can be measured accurately, and the cause and the development degree of the crack are determined through displacement features.
Owner:SHANDONG TRANSPORTATION INST +1
Automatic testing device and method of power module
InactiveCN102998630AReduce workloadImprove test efficiencyPower supply testingTest efficiencyEngineering
The invention discloses an automatic testing device and method of a power module. The automatic testing device is provided with a clamp used for fixing the power module to be tested, wherein the clamp is connected with a relay, the relay is respectively connected with different testing devices and is connected with a controller through a serial port or in other modes, and the controller is connected with all the different testing devices. The automatic testing method is characterized in that the relay is jointed, and the controller reads the practical measurement voltage value of a testing point of the power module to be tested and measured by a universal meter; the controller compares the practical measurement value and the allowed range measurement value of the power module to be tested and stored in the controller; and the testing result of the testing point of the power module to be tested is correct if the practical measurement value is within the allowed range measurement value, otherwise the resting result is wrong. According to the automatic testing device and method of the power module, manual wiring and conversion of various states of products to be tested are not needed, work load is reduced, and testing efficiency is improved.
Owner:JIANGSU JIAYU NEW POWER TECH
Calibration system and calibration method for satellite navigation signal simulator pseudo range control precision
ActiveCN105738924AAccurate detection of pseudo-range control accuracyCorrectSatellite radio beaconingCarrier signalPhase method
The invention is based on the working principle of the satellite navigation signal simulator, and provides a calibration system and calibration method for the satellite navigation signal simulator pseudo range control precision. The calibration system comprises a satellite navigation simulator, a navigation signal control module, a high speed oscilloscope and a pseudo range precision analysis module; the calibration system and the calibration method set up a pseudo range precision control platform through the measurement principle of the carrier wave phase method and form a test scheme which is accurate, practical and effective. The test method can reliably and accurately detect the pseudo range control accuracy of the satellite navigation signal simulator.
Owner:SHANGHAI INST OF MEASUREMENT & TESTING TECH
Real-time ultrasonic scanning device used during rock triaxial compression
PendingCN106644739APrevention of Disasters and AccidentsThe test method is simple and reliableMaterial strength using tensile/compressive forcesElectro hydraulicEngineering
The invention provides a real-time ultrasonic scanning device used during rock triaxial compression. The real-time ultrasonic scanning device comprises an axial pressing structure, a circumferential pressing structure and an ultrasonic scanning structure, wherein the axial pressing structure is an electro-hydraulic servo system (1), the circumferential pressing structure comprises an axial-penetrating cylinder barrel (9), the upper end and the lower end of the cylinder barrel (9) are respectively sealed by a top cover (3) and a bottom cover (14), the cylinder barrel (9), the top cover (3) and the bottom cover (14) jointly form a confining pressure chamber (7), a sample testing chamber (10) is arranged in the confining pressure chamber (7), and the ultrasonic scanning structure is a plurality of groups of ultrasonic scanning probes (13) connected to the outer lateral wall of the testing chamber (10). The real-time ultrasonic scanning device has the advantages that ultrasonic scanning can be performed on rock during the rock triaxial compression to monitor the generation of the internal cracks of the rock in real time, accurate experiment data can be obtained, a reliable testing and experiment result can be provided for a project, and a reliable testing method is provided for the prevention of project disasters and accidents caused by the cracks.
Owner:HUBEI UNIV OF TECH
Method for detecting surface viscosity of prepreg tows for automatic tow placement
ActiveCN109580476AImprove methods that can only be qualitatively graded but not quantifiedAvoid human errorUsing mechanical meansMaterial analysisFiberCarbon fibers
The invention relates to a method for detecting the surface viscosity of prepreg tows for automatic tow placement, and belongs to the technical field of prepreg automatic tow placement molding. The method comprises the steps that firstly, two prepreg tows are pre-bonded, the main axis direction of the bonding surface of the two prepreg tows is the same as the direction of carbon fibers in the prepreg tows, then a bonding area is placed on a mechanical hot pressing platform for hot pressing lap joint, the prepreg tows are separated from the hot pressing platform by a demould material, a temperature required for the lap joint is 10DEG C-60DEG C, the pressure for the lap joint is 0.1MPa-0.6MPa, and the time for the lap joint is 1min-10min; and then, a sample is symmetrically clamped on a clamp of a tensile tester, the tensile tester is started, and a tensile failure load of the prepreg tow sample is used as a quantitative characterization result of the surface viscosity. A surface viscosity value of the prepreg tows obtained by the method can be directly used for comparing the surface viscosity of various materials, can further be used for exploring the influencing factors of the surface viscosity of the prepreg tows, and has wide application prospects in practical production and scientific research fields.
Owner:AVIC COMPOSITES +1
Environmental stress screening method for BGA (ball grid array) welding spots
InactiveCN104360187APredicted Lifespan AcquisitionThe test method is simple and reliableElectrical testingElectric stressMechanical equipment
The invention relates to an environmental stress screening method for BGA (ball grid array) welding spots. The environmental stress screening method includes steps of a), randomly selecting n BGA welding spot samples and carrying out environmental stress screening processing on the BGA welding spot samples; b), carrying out comprehensive stress processing on the samples processed in the step a), to be more specific, carrying out second temperature cycle processing, random vibration processing and electric stress processing on the samples processed in the step a), recording failure time of the samples, and screening the BGA welding spots according to mean processing time to failure. The n is larger than or equal to 5. The invention further provides application of the method to manufacturing electronic products and mechanical equipment.
Owner:ZHUZHOU CSR TIMES ELECTRIC CO LTD
System and method for detecting dynamic range of satellite navigation signal
InactiveCN104635246AExperimental verification of correctnessExperimental verification of practicalitySatellite radio beaconingExperimental validationRadio frequency signal
The invention provides a system for detecting dynamic range of a satellite navigation signal. The system comprises a satellite navigation signal simulator, a frequency meter, a frequency automatic collecting device and a dynamic range analysis and calculating module. The system for detecting the dynamic range of the satellite navigation signal is utilized. The invention also provides a method for detecting the dynamic range of the satellite navigation signal; on the basis of satellite navigation signal simulator working principle and Doppler effect, a radio frequency signal received by a receiver under different dynamic environments can be simulated in real time, the method for detecting the dynamic range of the satellite navigation signal is analyzed at the aspects, such as speed, acceleration and jerk, a dynamic range detecting platform is built, a specific testing scheme is formed, and the experiment is conducted to verify the correctness, practicality and effectiveness of the testing method. The testing method has the advantages that the simplicity, convenience and reliability are realized, and the dynamic range of the satellite navigation signal can be correctly detected in the simulating environment.
Owner:SHANGHAI INST OF MEASUREMENT & TESTING TECH
Real-time detection method for compactness of poured vault
PendingCN111595944ASatisfy density monitoringQuality assuranceAnalysing solids using sonic/ultrasonic/infrasonic wavesProcessing detected response signalEngineeringAcoustic wave
The invention provides a real-time detection method for the compactness of a poured vault. The real-time detection method comprises the following specific steps of: mounting an acoustic wave testing device below an vault template; establishing an offline acoustic waveform database; transmitting an acoustic wave signal to the vault template by a transmitting unit, and receiving the acoustic wave signal by a receiving unit; comparing detected waveform data transmitted back by a receiver with data in the acoustic waveform database in real time by an upper computer, and matching a waveform with the highest overlap ratio with the current compactness echo in the database; and performing measurement compactness degree judgment on the matching degree of the waveform data by the upper computer. Byadopting the real-time detection method, the vault compactness monitoring in the whole process of concrete pouring and solidification can be effectively met, and the quality of secondary lining is practically guaranteed; and a non-contact vault detection mode is adopted, the device is mounted on a vehicle, any operation such as paving a detection piece before construction is not needed, and the simplest, more convenient and more reliable test method is provided.
Owner:CHINA RAILWAY CONSTR HEAVY IND
Ceramic fiber resistivity testing method
ActiveCN104597327AAccurate measurementEfficient measurementResistance/reactance/impedenceFiberHigh resistance
The invention relates to ceramic fibers, in particular to a ceramic fiber resistivity testing method. Multiple ceramic fibers are parallelly bonded to a metal plate sample table through double-sided adhesive tapes; the fibers are parallelly connected through silver conductive adhesive; after the silver conductive adhesive solidifies, a fiber sample and the metal plate sample table are put in a metal electromagnetic shielding box; the metal plate sample table, an electrometer for testing circuit current and a digital source meter providing test voltage are connected in series; under the constant-temperature constant-humidity condition, a micro current test is performed; after one current value is measured, voltage output of the digital source meter is closed; the metal electromagnetic shielding box is opened, one fiber is torn off, and corresponding micro current of the remaining parallel fibers is continually measured until that the current of the different fibers is all tested; resistivity values of the multiple groups of fibers different in quantity are solved according to the ohm law and a volume resistivity formula, and a statistical average is acquired. The problem that high resistance of the fine-diameter ceramic fibers cannot be accurately measured can be effectively solved.
Owner:XIAMEN UNIV
Method for testing foil resistivity
InactiveCN109991474AEliminate the effects ofAvoid the limitations of fittingResistance/reactance/impedenceMaterial analysis by electric/magnetic meansElectrical resistance and conductanceTransverse axis
The invention provides a method for testing foil resistivity. The method comprises the following steps: S1, cutting a foil to be tested into a plurality of samples with different lengths and equal widths; S2, testing the resistance Ri of each sample, wherein i is a sample number; S3, drawing a coordinate taking the length Li of each sample as a transverse axis and taking the resistance Ri of eachsample as a longitudinal axis, substituting each coordinate point (Li, Ri) into the coordinate to draw an oblique line, and acquiring the slope k of the oblique line, wherein i is an element of a set(1, n), and n is the quantity of samples; and S4, acquiring the resistivity of the foil to be tested according to a slope curve k=rho / S, wherein rho is the resistivity, and S is the cross sectional area of each sample of a unit length. According to the method, the slope k is obtained through coordinate fitting, so that the influence of external resistance on sample testing is eliminated, and the intrinsic resistivity of the foil to be tested can be calculated accurately. The testing method is simple and reliable, has high data accuracy, can realize accurate measurement of the resistivity of the foil, and has great application prospect in the field of lithium ion battery current collectors.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Rapid test method for measuring intrusion depth of sulfate ion in recycled concrete test piece
InactiveCN109724912AThe test method is fast and convenientThe test method is simple and reliableWeather/light/corrosion resistanceColor/spectral properties measurementsSULFATE IONAbsorbance
The invention discloses a rapid test method for measuring intrusion depth of sulfate ion in a recycled concrete test piece. The test method comprises the following steps: calibrating a standard curveof a sodium sulfate solution; fitting a standard solution curve equation; slicing the recycled concrete test piece and grinding into powder; using a spectrophotometer to determine the absorbance of the solution prepared by the sample powder; and substituting the measured absorbance into the standard solution curve equation to calculate the sulfate ion content, thereby defining the intrusion depthof the sulfate ion. The test method is fast, convenient, simple and reliable, has broad application prospect and little affect by external environmental factors, and can quantitatively characterize the depth of sulfate ion intrusion into the recycled concrete test piece.
Owner:孙峰
Method for testing tightness of welding lines
InactiveCN101726395BImprove work efficiencyImprove and shorten production cycleDetection of fluid at leakage pointVacuum pressureSoap solution
Owner:浙江东海岸船业有限公司
Piezoelectric body multi-field coupling induced vibration fatigue experiment device and test method
PendingCN111157378AImprove accuracySimple structureMaterial strength using repeated/pulsating forcesVibration testingMagnetic tension forceControllability
The invention discloses a piezoelectric body multi-field coupling induced vibration fatigue experiment device and a test method. The piezoelectric body multi-field coupling induced vibration fatigue experiment device comprises a vibration excitation device, a temperature field loading device and an electric field loading device, wherein the vibration excitation device uses a non-contact magnetic force between a rotating magnetic field and a magnet as an excitation force; the temperature field loading device arranges a heating coil around an experimental object; and the electric field loading device applies a controllable electric load to an experiment object by connecting the experiment object with an external adjustable power supply. The device is simple, easy to use, low in cost and highin controllability, can provide stable and controllable force load or force, electric load or heat, force load or heat, force and electric load for the experiment object, is high in accuracy of experimental results, and has important value for researching the vibration fatigue life test problem of the piezoelectric structure under the multi-field coupling loading effect.
Owner:NANCHANG HANGKONG UNIVERSITY
Method for testing control board of electromagnetic valve
ActiveCN101769828AEase of mass productionThe test method is simple and reliableStructural/machines measurementLaser transmitterTester device
The invention discloses a method for testing a control board of an electromagnetic valve, comprising the following steps of: (1) selecting an electromagnetic valve, respectively mounting laser emitters with different heights at two sides of the electromagnetic valve, and correspondingly mounting a photoelectric sensor at the other side of the electromagnetic valve provided with the laser emitter; (2) mounting the control board of the electromagnetic valve to be tested at the side of the electromagnetic valve, carrying out a test of starting delay time and releasing delay time on the control board of the electromagnetic valve through a magnetic valve control board tester, and sealing the tested control board of the electromagnetic valve with glue; (3) repeating the test of starting delay time and releasing delay time to the tested control board of the electromagnetic valve after the glue sealing, wherein the control board of the electromagnetic valve passing the secondary test is qualified. The test method of the invention is simple and reliable, the qualified control board of the electromagnetic valve has strong practicability and long service life.
Owner:上海文安电脑技术有限公司
Prepreg splicing strength detection method for automatic placement
InactiveCN109580477AIntensity full responseThe test method is simple and reliableUsing mechanical meansMaterial analysisStress conditionsEngineering
Owner:AVIC COMPOSITES +1
ict
PendingCN108469583AIncrease detection efficiencyImprove detection capabilitiesPrinted circuit testingCapacitanceEngineering
The invention discloses an ICT. The ICT comprises a floor, an electrical element pin testing mechanism, an electrolytic capacitor reverse plugging testing mechanism and a needle base reverse pluggingtesting mechanism, wherein the floor is driven to move towards an element side of a circuit board, the electrical element pin testing mechanism is arranged on the floor and used for testing whether ornot electrical elements, located on the element side, of pins can be normally used, the electrolytic capacitor reverse plugging testing mechanism is arranged on the floor and used for testing whetheror not an electrolytic capacitor on the element side is plugged reversely, and the needle base reverse plugging testing mechanism is arranged on the floor and used for testing whether or not a to-be-tested needle base on the element side is plugged reversely. By arranging the electrical element pin testing mechanism, the electrolytic capacitor reverse plugging testing mechanism and the needle base reverse plugging testing mechanism on the floor simultaneously, the technical problems in the prior art are solved that a floor testing function of an ICT is monotonous, comprehensive checking on electrical elements on the element side of the circuit board is lacked, and whether or not different electrical elements located on the element side of the circuit board are plugged reversely cannot bechecked simultaneously.
Owner:GREE ELECTRIC APPLIANCES ZHENGZHOU +1
Test method and system for video stability
InactiveCN107734326AEasy to buildEasy to test and deployTelevision systemsSelective content distributionNetwork communicationComputer engineering
The invention discloses a method and system for testing video stability, and relates to the technical field of network communication. The method for testing video stability includes: acquiring video data of a first video played on a first terminal through a router, and downloading the video Playing the data to obtain a second video; comparing the first video with the second video to determine the number of freezes of the second video; judging whether the number of freezes of the second video exceeds a preset The number of times; if it exceeds, it is considered that the playback of the second video is unstable. The method provided by the invention is simple and convenient to test and deploy, and can automatically calculate the number of freezes during the playing process of the video, so as to judge the stability of the playing video.
Owner:台州市吉吉知识产权运营有限公司
Test method for effective pore volume and porosity of lithium-ion battery pole pieces
ActiveCN103278438BSimple test methodEasy to manufacturePermeability/surface area analysisLithium-ion batteryCalculation methods
Owner:TIANJIN LISHEN BATTERY +1
Method for testing pore closing temperature of diaphragm
ActiveCN108303442AAvoid influenceAccurate measurementResistance/reactance/impedenceThermometer applicationsAdhesiveCopper foil
The invention discloses a method for testing the pore closing temperature of a diaphragm. The method comprises the following steps: preparing a first standard diaphragm, a second standard diaphragm, athird standard diaphragm, standard green adhesive tapes, a standard copper foil and a standard aluminum-plastic film, wherein the middle of the standard green plastic adhesive is provided with a circular hole with a preset diameter; respectively pasting one to five layers of the first standard diaphragm to one of the standard green adhesive tapes to obtain a first target diaphragm; respectively pasting one to five second standard diaphragms to one of the standard green adhesive tapes to obtain a second target diaphragm; respectively pasting one to five layers of the third standard diaphragm to one of the standard green adhesive tapes to obtain a third target diaphragm; sequentially assembling the first target diaphragm, the second target diaphragm, the third target diaphragm, the standardcopper foil, the standard aluminum-plastic film and a preset battery to obtain a corresponding flexibly packed battery; and measuring impedance of the flexibly packed battery by adopting an electrochemical workstation, linearly fitting the ohmic impedance value and the diaphragm layer number, and calculating the ion conductivity of the diaphragm to obtain the catastrophe point of the ion conductivity of the diaphragm, that is the corresponding pore closing temperature of the diaphragm.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Test method for iron ore powder sintering assimilation flux amount and speed
ActiveCN104359934BImprove accuracyThe test method is simple and reliableMaterial weighingInvestigating phase/state changeIron powderCoal
Owner:武汉钢铁有限公司
Short-circuit resistance test method
InactiveCN107728068AImprove accuracyAccurate measurementSecondary cellsElectrical testingElectrical resistance and conductanceEngineering
The invention discloses a short-circuit resistance test method. The method comprises the steps that a full-charge battery is disassembled to acquire various kinds of pole pieces in different short-circuit modes; each pole piece is made into a square piece of 41 mm*30 mm; the pole pieces are assembled into a soft pack battery in different short-circuit modes; electrolyte is not needed; an electrochemical workstation is used to test the impedance of the battery; and the measured ohmic resistance is the short-circuit resistance of the battery. The short-circuit resistance of four short-circuit modes is tested to prove the usability and rationality of the method. The test method provided by the invention is simple and reliable, has the advantages of high data accuracy and good consistency, canaccurately measure the short-circuit resistance or other types of resistance, and has a great application prospect in the field of the study of battery safety mechanisms.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Bench test method for automatic locking and unlocking control of special vehicle comprehensive transmission device
ActiveCN112504669ASolve the problem that the automatic closing and unlocking function cannot be testedThe test method is simple and reliableVehicle testingMachine part testingBench testElectrical and Electronics engineering
The invention belongs to the technical field of special vehicles, and particularly relates to a bench test method for automatic locking and unlocking control of a special vehicle comprehensive transmission device. The method comprises the following steps: under the condition that a bench test cannot provide real vehicle bus information, reading a bus signal and specific parameters of the comprehensive transmission device; judging whether the comprehensive transmission device works under the working condition of the bench or not; under the bench test working condition, a fan is set to work under the mechanical working condition, the rotating speed of the fan is collected, the rotating speed of the engine is obtained according to the rotating speed ratio of the fan to the engine, a hydraulictorque converter is controlled to be automatically locked and unlocked through an engine rotating speed signal, so that the automatic locking and unlocking function test of the hydraulic torque converter under the bench working condition is achieved. According to the method, the automatic locking and unlocking bench test of the comprehensive transmission device can be carried out under the condition of lack of a real vehicle environment without adding extra equipment and operation, the problem that the automatic locking and unlocking function cannot be tested in the bench test is solved, andthe test method has the characteristics of simplicity, reliability, good real-time performance, low cost and the like.
Owner:CHINA NORTH VEHICLE RES INST
An accelerated life prediction method for bga solder joints
ActiveCN104344988BGet Predicted LifespanThe test method is simple and reliableStrength propertiesAcceleration factorElectric stress
Owner:ZHUZHOU CSR TIMES ELECTRIC CO LTD
Gasoline engine inverter automatic test method and system
ActiveCN105974238BMeet the test requirementsTest requirements preventElectrical testingPower inverterGasoline
The invention provides an automatic testing method and an automatic testing system for a gasoline engine inverter, wherein the automatic testing method comprises the steps of respectively acquiring the voltage, the current and the THD value of an inverter in states such as idle state and loaded state by means of the automatic testing system, automatically generating a testing report, printing a testing label, and realizing automatic testing function of the inverter. The testing system comprises a to-be-tested inverter and a main controller. The automatic testing method and the automatic testing system are characterized in that the information input end of the main controller is connected with the information output end of a tester; the first input end of the tester is connected with the output end of the to-be-tested inverter; the control output end of the main controller is connected with the input end of a driver; the first output end of the driver is connected with the frequency modulation control end of a power supply; the power supply is connected with the power input end of the to-be-tested inverter; and the communication end of the main controller is connected with the debugging end of the to-be-tested inverter. The automatic testing method and the automatic testing system have advantages of simple structure and high operation reliability.
Owner:CHONGQING YUXIN PINGRUI ELECTRONICS
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