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59 results about "Oscillation test" patented technology
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Flexural oscillation testing machine for metal flexible pipe
InactiveCN101196451AImprove test efficiencyRealize alternating constant displacement motionMaterial strength using repeated/pulsating forcesElectric machineElectrical control
A metal soft tube flexural oscillations tester for conducting life test is provided, which comprises a stander, a control cabinet, an electric control unit and a displaying unit. The technical points are that: a transmission oil cylinder, a rotating axle and a transmission arm are arranged in the stander, which are connected with an arm swinging link gear to compose the actuating unit of the equipment. and the hydraulic pressure machine set drive motor power structure drives the equipment to movement swinging arm; the two ends of the metal soft tube are installed on a fixing pressing base and a dynamic displacement compensation mechanism, and the metal soft tube movement trail is adjusted by an arc limiting structure; one end of the metal soft tube is connected fixedly with the arc limiting structure to realize bending and double-direction swinging function. Through an electric control unit, a starting dynamo, the alternate invariable displacement structure composed of an eccenter, a connecting bar, a linear guide and a movement end connected with base is driven by a reducer driven by electric engine, which makes the metal soft tube fixed on the connecting base of the moving end realize the curvature movement of invariable displacement.
Owner:SHENYANG ACAD OF INSTR SCI
Electric reactor turn-insulating detection device based on pulse oscillation principle
InactiveCN104515941AImprove product qualityGuaranteed safe operationTesting dielectric strengthLow voltageCapacitive voltage divider
The invention relates to an electric reactor turn-insulating detection device based on pulse oscillation principle. Two output ends of a transformer are connected with a high voltage silicon rectifier stack, a protective resistor and a resistance voltage divider high / low voltage arm resistor which are connected sequentially and serially; controllable discharge spark gaps and two ends of a damping oscillating circuit are all connected with two ends of the resistance voltage divider high / low voltage arm resistor in parallel; the damping oscillation circuit consists of a damping resistor, a main capacitor and an electric reactor test object; a controller unit is adopted to control the discharge spark gaps to discharge electricity and the transformer to output voltage according to voltage at two ends of the resistance voltage divider high / low voltage arm resistor; pulse oscillation is formed on a pulse oscillation test product in the spark gap discharge process, pulse oscillation signals formed on the electric reactor are transmitted to an oscilloscope through capacitive voltage dividers which are serially connected at two ends of the electric reactor test product, and thus diagnosis on the turn-insulating of the electric reactor is achieved. The electric reactor turn-insulating detection device aims to solve the passive situation that the turn-insulating of the electric reactor cannot be monitored for a long time at present, and has benefits of improving the product quality of an electric reactor manufacturing factory and ensuring the safe operation of a whole power grid.
Owner:STATE GRID CORP OF CHINA +2
Method for calibrating axial power deviation of out-of-pile nuclear instrument system of nuclear power plant
ActiveCN108172312AReduce disturbanceReduce the chance of premature shutdownNuclear energy generationNuclear monitoringNuclear powerNuclear engineering
The invention relates to the technical field of a nuclear instrument system of a mega-kilowatt class nuclear power plant and provides a method for calibrating the axial power deviation of an out-of-pile nuclear instrument system of a nuclear power plant. The method comprises in the reactor circulation period, carrying out a xenon oscillation test (for acquiring one-step whole-core fluxgraph data and at least four set of partial fluxgraph data) to acquire power range calibration factors alpha for adjusting reactor core axial power offsets of measurement channels of the out-of-pile nuclear instrument system in the power range, utilizing the factor alpha of the last xenon oscillation test in all the cycles from the current xenon oscillation test to the next xenon oscillation test, and updating the parameters KU and KL of each measurement channel according to the factor alpha. The method reduces the frequency of the partial fluxgraph measurement, reduces the disturbance of the xenon oscillation test on a nuclear power unit and reduces the probability of the shutting-down in advance of the nuclear power unit.
Owner:GUANGDONG NUCLEAR POWER JOINT VENTURE +4
Constant temperature crystal oscillator automatic current test and analysis system and method
InactiveCN102288848AReduce human errorImprove current test efficiencyCurrent/voltage measurementElectrical testingEngineeringStart up
The present invention relates to an automatic current test and analysis system for a constant temperature crystal oscillator. The system includes: 1) a multi-channel oscillator test board, 2) a program-controlled ammeter, 3) a multi-channel switching device, and 4) a computer control system; the method steps: 1) Set the test standard for this current test analysis; 2) Add a crystal oscillator to a multi-channel oscillator test board; 3) Check whether there is an abnormal crystal oscillator current, 4) Start the formal test; 5) Test the crystal oscillator 6) After testing the first crystal oscillator, make the first crystal oscillator enter the power-on stable state, and at the same time switch the ammeter to test the second crystal oscillator, repeat step 5) until the final test Start-up current of one crystal oscillator; 7) Measure the steady current of all crystal oscillators. Compared with the prior art, the present invention has the following beneficial effects: reducing manpower use during testing and reducing data human errors. Improve the current test efficiency of OCXO, use only one current test instrument, achieve the speed of multiple test instruments, and reduce equipment investment.
Owner:平湖市电子有限公司
Crystal oscillator oscillation test fixture
Owner:DFINE TECH
Relay protection test method and system
InactiveCN106033102AFast multiplexingImprove test efficiencyElectrical testingMultiplexingTest input
Owner:NR ENG CO LTD
Method for determination of anisotropic medium permeability parameters based on single-hole flow wave equation
InactiveCN102798705ALess restrictive conditions for field trialsShort test timeEarth material testingWave equationCo2 storage
The invention discloses a method for determination of anisotropic medium permeability parameters based on single-hole flow wave equation, comprising the steps of: first, determining the permeability parameter Keij of a single fracture through the single well flow wave equation; second, according to the fractured medium hydrodynamics theory, calculating the equivalent permeability coefficient Kei of same group discontinuities; at last, obtaining the anisotropic medium permeability parameter K based on the rock mass permeability tensor theory. By employing fractured medium hydrodynamics and oscillation test principles in the method, tests and data processing can be quickly finished on spot and the anisotropic medium permeability tensor can be obtained. The method can be used for parameter determination in study of pollutant migration, nuclear waste and carbon dioxide storage and underground heat motion, and also can be used in the field of, such as foundation safety inspection and large volume concrete safety inspection, having a great application and popularization value.
Owner:HOHAI UNIV
Oscillation testing protective equipment and testing method
InactiveCN101226384AImprove protectionImprove securityProgramme controlVibration measurement in solidsLiquid-crystal displayInterference resistance
The invention discloses a vibration detecting protecting device, which comprises a main controller for collecting, processing and converting vibration signals into real-time vibration data and outputting alarm signal and / or jump signal according to the real-time vibration data, a sub controller connected with the main controller for reading real-time vibration data and displaying the data on a liquid crystal display unit, and a liquid crystal display unit connected with the sub controller for displaying the real-time vibration data. the invention uses the liquid crystal display unit to on-site display the real-time vibration data obtained by the main controller and can realize on-site real-time detection on the vibration of object machine, thereby improving projection on the machine and improve machine safety. The invention has high integrality, small volume, strong interference resistance, high reliability and simple installment.
Owner:北京英华达电力电子工程科技有限公司
Method for rapidly evaluating freeze-thaw resistance of water-based polymer coating material
InactiveCN105954150AQuality improvementRapid assessmentFlow propertiesStrength propertiesWater basedFreeze thawing
The invention discloses a method for rapidly evaluating the freeze-thaw resistance of a water-based polymer coating material. The method includes the following steps of firstly, preparing a rotational rheometer and a to-be-detected sample; secondly, detecting the linear viscoelastic region and the oscillation test recommend amplitude of the sample; thirdly, detecting the initial rheology information of the sample; fourthly, conducting rheometer freeze-thaw circulation, and detecting the rheology information of the sample in the freeze-thaw circulation process; fifthly, after completing freeze-thaw circulation, detecting the after-circulation rheology information of the sample; sixthly, evaluating the freeze-thaw resistance of the sample according to the change situation of the rheology information, existing before freeze-thaw circulation, of the sample and the rheology information, existing after freeze-thaw circulation, of the sample. The method and standard for rapidly evaluating the freeze-thaw resistance of the water-based polymer coating material are developed, the freeze-thaw resistance of the product can be rapidly detected, the production standard of the water-based polymer coating material can be further defined instantly according to the test result of the freeze-thaw resistance of the product, and therefore the overall quality of the water-based polymer coating material product is improved.
Owner:NIPPON PAINT GUANGZHOU
Rock mass fracture occurrence recognizing system in oscillation testing system
InactiveCN102830051AAccurate identificationQuick identificationPermeability/surface area analysisData acquisitionPermeability coefficient
The invention discloses a rock mass fracture occurrence recognizing system in an oscillation testing system. The rock mass fracture occurrence recognizing system comprises an underground drilling image recognition orientating system, a cable counting winch system and a PDA (personal digital assistant) data acquisition system, wherein output ends / input ends of the underground drilling image recognition orientating system and the cable counting winch system are respectively connected with the input end / output end of the PDA data acquisition system correspondingly. With the adoption of the system, fracture images and position and depth data can be obtained through the underground drilling image recognition orientating system and the cable counting winch system, thereby the fracture occurrence of fractured rock mass is obtained, and reliable basic geologic information is provided for determining permeability coefficient tensors for having oscillation tests in the fractured rock mass.
Owner:HOHAI UNIV
Testing device and method of hydrogeological parameter determining of obliquely-filled cracks
The invention discloses a testing device and method of hydrogeological parameter determining of obliquely-filled cracks. The testing device comprises an oscillation test parameter testing system main machine, an air pressure type oscillation test water head stimulating unit well head sealing cavity, a casing pipe, a communication electric cable, a multi-functional probe, a sealing cavity pressure releasing valve, a sealing cavity barometer, a sealing cavity air inlet valve, a sealing cavity air inlet pipe, an air pressure plugging system, a punched hole and a chock plug; according to the testing method, one single target crack is isolated through an air pressure plug, and the target cracks are subjected to an air pressure type oscillation test; and a standard curve is drawn through a derived obliquely-filled crack oscillation test module, the target crack transmissibility coefficient and the water storage coefficient of the target cracks are calculated through the curve fitting method, and the influence of the border distance of a radial constant head on the precision of parameter calculating is evaluated.
Owner:HOHAI UNIV
Detecting system for relay protection fault and oscillation based on double CPU and its distinguishing method
InactiveCN1945913AImprove reliabilityReduce lag timeEmergency protective circuit arrangementsProgram controlComputer moduleData collecting
This invention relates to a relay fault protection and oscillation test system based on double CPU composed of a data collecting module, an A / D conversion module, a DSP signal process module, a switch control module and a display module, the differentiation method for oscillation and fault is to compute modulus value and analyze and compare the measurement values, which can differentiate fault during oscillation so as to avoid error operation of relay protection devices during oscillation.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
System for testing oscillating and fault in relaying protection device based on DSP and distinguishing method thereof
InactiveCN1787317AReduce lag timeReduce precisionEmergency protective circuit arrangementsFault locationDigital signal processingEngineering
This invention relates to a fault and oscillation test system and its differentiation method in a DSP relay protection device, which utilizes a high performance digital signal process chip to realize the division of the states of fault and oscillation by a new differentiation method to differentiate the states of fault and oscillation and fault during oscillation period to avoid error action.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Low noise type oscillation impact testing machine
The invention relates to the impact testing machine technology field and provides a low noise type oscillation impact testing machine. The machine comprises a rack, a rotating disk, a rotating shaft, a lifting lever, a cam, a rope and a driving mechanism. The rotating disk is rotatably arranged on the rack through the rotating shaft. The lifting lever is fixedly arranged on the rotating disk. The cam comprises a pin joint end and a connection end which is opposite to the pin joint end. The pin joint end is pivotally arranged on the rotating disk. One end of the rope is connected with the connection end of the cam. The driving mechanism drives the rotating disk to rotate through the rotating shaft. The rotating disk drives the lifting lever to rotate. After operating a preset angle, the lifting lever bears against the connection end of the cam and operates along with the connection end till that the connection end is separated from the lifting lever under an effect of a pulling force of the rope. The low noise type oscillation impact testing machine of the invention does not generate the noise or the loud noise in a bag oscillation test and is suitable for various kinds of office environment requirements.
Owner:DONGGUAN CLIPHYCO INSTR
Test method of lithium ion battery slurry viscoelasticity
ActiveCN109580429AAccurate measurementGood repeatabilityFlow propertiesLithium-ion batteryRepeatability
The invention relates to the field of a lithium ion battery, and discloses a test method of lithium ion battery slurry viscoelasticity. The method comprises the following steps of (1) performing stillstanding and constant temperature treatment on lithium ion battery slurry before test to obtain a sample to be tested; (2) contacting a rotor of a rheometer with the sample to be tested; performing rotating treatment to obtain a treated sample; and (3) performing oscillation test on the treated sample by using the rotor of the rheometer; setting different shearing strain; measuring an energy storage modulus and a loss modulus corresponding to each shearing strain; expressing the slurry elasticity by using the maximum value of the energy storage modulus; and expressing the slurry viscosity bythe maximum value of the loss modulus, wherein the rotating treatment process comprises the steps of rotating the rotor for 4 to 8 min at the first shearing speed of 80 to 120 s<-1>, and then rotatingthe rotor for 10 to 20 min at the second shearing speed of 0.005 to 0.02s<-1>. By using the method provided by the invention, after the multi-time measurement on the same slurry, viscoelasticity datawith high repeated performance and high accuracy can be provided.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD
Link oscillation test method, device and system
ActiveCN108337101AImprove robustnessImprove stabilityData switching networksComputer hardwarePhysical layer
The invention discloses a link oscillating test method, device and system, which relate to the technical field of communications and are used for solving the problem that the physical link oscillationeffectiveness cannot be accurately tested in the prior art. The method comprises that: the test device generates a physical signal in a preset manner; the test device sends the physical signal to tested equipment; wherein, the physical signal triggers the tested equipment to generate a link oscillation phenomenon; and the test device tests a daughter card on the tested equipment based on the linkoscillation phenomenon. According to the method, the device and the system, a scenario in which the link of the current network is abnormal is simulated, and then the effectiveness of link oscillation suppression is tested specifically and efficiently, so that a simulation technology progress on the physical layer link abnormality is made, the time for manual insertion and removal of an optical fiber and adjustment on light decay is saved, and the robustness and stability of the daughter card on link abnormality processing are improved.
Owner:ZTE CORP
Routing oscillation test method and autonomous system (AS)
The invention discloses a routing oscillation test method and an autonomous system (AS). The method comprises the following steps: receiving route change markers and route update advertisements, which are sent by adjacent ASs; judging whether the proactive route change event happens to self; if so, comparing to check whether the currently received identification of a source AS of the route change marker is the same as the self identification; obtaining that the currently received route update information of the route change marker is the same as that in self proactive route change event; determining that routing oscillation happens; wherein, the proactive route change event indicates that route change happens to self due to the received route update advertisements. The routing oscillation test method provided by the invention does not require each AS to disclose self routing strategies or route historical information, and has simple method and high operability.
Owner:BEIHANG UNIV
Device for helping pulse oscillation test
PendingCN108095724ASolve the need for companionshipSolve the problem of medical staff supporting the cheeks on both sidesRespiratory organ evaluationSensorsNatural stateEngineering
The invention relates to a device for helping a pulse oscillation test. The device comprises a nose clamp, an elastic testing band and two face clamping pieces, the elastic testing band is composed ofa noise constraint band, two face constraint bands and connecting components, the two face constraint bands are connected to the two ends of the nose constrain band respectively, the connecting components are connected to the ends of the face constraint bands, two round pads used for clamping a nose are arranged at the front end of the nose clamp, the two face constraint bands are sleeved with the two face clamping pieces through sliding bushes respectively, two elastic through holes are formed in the nose constrain band, and the round pads at the front end of the nose clamp penetrate throughthe elastic through holes. In the natural state without external force, the diameter of the elastic through holes is smaller than that of the round pads at the front end of the nose clamp. The deviceis simple in structure, convenient to use and capable of solving the problems that in the prior art, when the pulse oscillation test is performed, the two sides of a face need to be supported by special staff, and a nose clamp is prone to falling, and is fixed firmly.
Owner:LIUZHOU CITY HEALTHCARE HOSPITAL FOR WOMEN & CHILDREN
Control system for model oscillation test under wind tunnel rotational flow field
ActiveCN109557901ASolve the phase relationshipImprove reliabilityAerodynamic testingElectric testing/monitoringEnergy absorptionRotational flow
The invention discloses a control system for a model oscillation test under a wind tunnel rotational flow field. The system comprises a remote computer, a system general control computer and an acquisition system, and further comprises a brake energy absorption module, an oscillation starting point sensing module, a driving power output module, a CANopen bus module, a driving control unit, an encoding signal input module, an auxiliary unit, a trigger signal conditioning module, a trigger signal output module and a real-time position output module. The oscillation starting point sensing modulesenses a zero signal of a rotating shaft by adopting an optocoupler and transmits the signal to the driving control unit, so that an oscillation shaft motor is activated to start the oscillation shaftto oscillate, and the oscillation shaft can start oscillating at a zero phase of the rotating shaft when a rotating shaft motor rotates at different rotation frequencies. The driving control unit sends an acquired trigger signal. The auxiliary unit triggers the acquisition system to acquire a scale signal according to a set parameter. According to the control system for the model oscillation testunder the wind tunnel rotational flow field, an establishment of the rotational flow field and a sine oscillation movement are realized, and the system is high in reliability and stability.
Owner:中国航空工业集团公司哈尔滨空气动力研究所
Variable structure type C type LNG (liquefied natural gas) liquid tank oscillation test system
InactiveCN104406767AEasy to installEasy maintenanceHydrodynamic testingPilot systemTransportation technology
The invention discloses a variable structure type C type LNG (liquefied natural gas) liquid tank oscillation test system, and belongs to the oceanographic engineering LNG / LPG (liquefied petroleum gas) storage and transportation technology field. The variable structure type C type LNG liquid tank oscillation test system is composed of an end socket, a main tank body, a swash bulkhead, an oscillation simulation platform, a control system and the like. A test tank is divided into three portions which are respectively a first end socket, a second end socket and the main tank body. The first end socket and the second end socket are installed at two ends of the main tank body. The swash bulkhead is fixed in the test tank, and placed at an optional position in the main tank by loosening and tightening a coupling screw on the swash bulkhead. Pressure sensors are arranged on designated positions in the test tank, on the end socket and on the swash bulkhead, and wireless signals and wired signals, sent by the pressure sensors, are received by the control system. The variable structure type C type LNG liquid tank oscillation test system has the advantages of being capable of testing influences of different forms of the end sockets on oscillation physical properties, using a dismountable combination mode, being convenient to install, dismantle and maintain, facilitating position and quantity adjustment of the swash bulkhead and form replacement of the swash bulkhead, and improving flexibility of a test.
Owner:DALIAN UNIV OF TECH
Multifunctional integrated data collection system for indoor oscillation test platform
The invention provides a multifunctional integrated data collection system for an indoor oscillation test platform. The multifunctional integrated data collection system comprises a data transmission and level conversion module, a plurality of temperature and pressure sensing components and a computer. Each temperature and pressure sensing component is connected to the data transmission and level conversion module. The other end of the data transmission and level conversion module is connected with a port of the computer. The temperature and pressure sensing components transmit collected pressure and temperature data information to the data transmission and level conversion module in parallel through RS485 communication. The data transmission and level conversion module converts the received data information and finally the data information obtained after conversion is fed back to the computer in real time through RS232 communication. The multifunctional integrated data collection system for an indoor oscillation test platform is novel is concept and compact and reasonable in structure, is convenient to operate, can measure temperature and water level data at the same position at the same time and also can measure the temperature and water level data at different positions at the same time.
Owner:HOHAI UNIV
Oscillation test tube rack for gene detection
InactiveCN110575853AAccurate detectionWell mixedShaking/oscillating/vibrating mixersTransportation and packagingDiseaseFixed frame
The invention relates to the technical field of gene detection and discloses an oscillation test tube rack for gene detection. The oscillation test tube rack comprises a fixed shell, wherein a rotating base is movably mounted at the inner lower end of the fixed shell; a fixed frame is fixedly mounted on the upper end of the rotating base; the fixed frame comprises a supporting base, a movable rod,the rotating base and a fixed hoop; a fixed shaft is fixedly installed at the lower end of the supporting base and fixedly installed at the upper end of the rotating base; a movable spring is fixedlyinstalled at the upper end of the supporting base; the upper end of the movable spring is fixedly connected with the rotating base; a fixed hoop is rotationally installed on the inner side of the rotating base; and the inner side of the fixed hoop is movably sleeved with a test tube. According to the invention, since the fixed frame is arranged, the test tube can be shaken in the process of genedetection, so a to-be-detected solution in the test tube is better mixed with a detection reagent, the result of gene detection is more accurate, and people can better judge the disease condition of the body according to the gene detection result.
Owner:李子香
Device and method for testing gradient and oscillation of cable-stayed bridge tower
InactiveCN103245329AEnsure safetyLarge rangeSubsonic/sonic/ultrasonic wave measurementUsing wave/particle radiation meansCable stayedEngineering
The invention discloses a device and a method for testing gradient and oscillation of a cable-stayed bridge tower. The device comprises a cable tower oscillation test laser emission device I, a cable tower oscillation test laser emission device II, a cable tower oscillation target spot device I and a cable power oscillation target spot device II. The device is characterized in that the cable tower oscillation test laser emission device I and the cable tower oscillation test laser emission device II are respectively arranged at the upstream side and the downstream side of a cable-stayed bridge bearing platform. The cable tower oscillation target spot device I and the cable power oscillation target spot device II are respectively arranged on the side surface of the upstream of the top and the side surface of the downstream of the middle of a cable-stayed bridge cable tower. The device has the characteristics of large measuring range, high precision, good resolution, reliability in working, convenience in operation and the like, is capable of carrying out continuous testing in an all-weather manner and outputting test data in real time, and provides novel instrument and equipment for testing the gradient and the oscillation of the cable-stayed bridge tower.
Owner:HEFEI UNIV OF TECH
Method and device for detecting and debugging violin panel
InactiveCN102903353AAdjust pronunciation effectThe pronunciation effect hasViolinsAudio power amplifierResonance
The invention provides a method and a device for detecting and debugging a violin panel, wherein a low-frequency generator and an oscillation test box are used to detect the resonance of the violin panel before installation, and the sound production effect of the violin panel is regulated based on the distribution condition of nodal lines of resonance waves. The device comprises the low-frequency generator and the oscillation test box, wherein the oscillation test box comprises a box body, a subregion detection board located above the box body, a control board located at the lateral side of the box body, and an amplifier located below the subregion detection board, a loudspeaker is arranged in the middle of the subregion detection board, and a resonance transmission rod is arranged above the subregion detection board. According to the invention, the sound production effect of the violin panel is detected accurately before installation, and the resonance of the violin panel can be regulated, so that the merit factor of violin products is improved greatly.
Owner:河北金音乐器集团有限公司
Oscillation test for off track write
InactiveUS7885024B2Shorten test timeDriving/moving recording headsRecord information storageComputer hardwareMagnetic media
An enhanced oscillation test for detecting off track writing associated with a read / write head writing, on a magnetic media, a measurement track. Once the measurement track is written, a series of seek, write, and read operations is performed, e.g., between various origin tracks and the tracks adjacent to the measurement track, in order to detect any off track write problems. If a measurement track read operation fails a certain number of times, then an error code is generated which indicates an off track write problem.
Owner:WESTERN DIGITAL TECH INC
System for acquiring real-time infrared spectrum in oscillation test
The invention discloses a system for acquiring a real-time infrared spectrum in an oscillation test. A temperature in a box body can be controlled by controlling a temperature adjusting system througha controller; a temperature of a sample in an oscillation test is controlled; the controller can control the rotating frequency of a rotary drum, the strain generated by rotation and the rotating force value through a dynamic torque sensor and a driving device; and a sample is clamped on a clamp; the clamp is arranged on the rotary drum, and therefore, the rotating frequency of the sample, the strain generated by rotation and the rotating force value are controlled by the controller, an interference light beam generated by an infrared spectrometer penetrates the oscillated sample in real time, so that the continuous infrared spectrum of the sample under the oscillation test adjustment can be obtained, the adjustment of various oscillation conditions of the sample and the test adjustment under different temperature environments are achieved through the controller, and the continuous infrared spectrogram of the sample under different oscillation test conditions can be obtained in real time to improve the understanding of people on macromolecular chain movement.
Owner:GUANGDONG UNIV OF TECH
Oscillation testing device of servo motor of numerical control machine tool
InactiveCN102722138AEasy to installJudging work statusProgramme controlComputer controlNumerical controlClassical mechanics
The invention provides an oscillation testing device of a servo motor of a numerical control machine tool. The oscillation testing device comprises a computer, an adjustable camera, a testing tool body and fixing devices, the testing tool body comprises a shallow tank, a solution with the kinematic viscosity of 0.6x10<-3>pa.s-50x10<-3>pa.s at temperature of 40 DEG C is contained in the shallow tank, the adjustable camera directly faces to the solution level, the height of the camera is adjusted to a level by which the cameral can just take a complete picture of the solution level, changes of the solution level are monitored by computer videos, and oscillation of the servo motor can be quantifiably tested by a speed sensor mounted on the testing tool body. The problem of difficulty in distinguishing vibration of the numerical control machine tool from vibration caused by oscillation of the servo motor in the prior art is solved by the oscillation testing device, and the oscillation testing device of the servo motor of the numerical control machine tool has good application prospect.
Owner:GUANGXI UNIVERSITY OF TECHNOLOGY +3
Circuit breaker oscillation testing device and testing method thereof
InactiveCN105652196AIntuitive bounce waveformDetect credible cases of contactCircuit interrupters testingElectrical resistance and conductanceEngineering
The invention discloses a circuit breaker oscillation testing device. The circuit breaker oscillation testing device is characterized in that a power supply is included, the power supply is connected with two series-connected resistors through connecting wires, and the two ends of one resistor are connected with a circuit breaker in parallel and further connected with an oscilloscope in parallel. According to the device, all waveforms which generate oscillations can be tested in the switching on and switching off process of the circuit breaker, the specific time points when the oscillations occur, the severity, that is, the amplitude and frequency of the oscillations and the oscillation process can be displayed to check whether operation of the circuit breaker is stable or not, and a basis is supplied to product improvement.
Owner:CHINT ELECTRIC
Self-excited oscillation test device of deepwater buoy platform and test method
InactiveCN102519706AEstablish the theory of self-excited oscillationSolving Self-excited Oscillation StudiesHydrodynamic testingBuoySelf excited oscillation
Owner:OCEAN UNIV OF CHINA
Device for sealing temperature measurement lead in thermal oscillation test
ActiveCN111326268AGuaranteed tightnessImprove sealingNuclear energy generationNuclear monitoringEngineeringThermocouple device
The invention belongs to the technical field of thermal oscillation test temperature measurement, and particularly relates to a device for sealing a temperature measurement lead in a thermal oscillation test. The device comprises an upper flange and a lower flange, and a plurality of reducing channels with thin outer parts and thick inner parts are respectively formed in the axial directions of the two flanges. A sheath and a clamping sleeve, which are matched with the upper reducing channels and the lower reducing channels in shape, are arranged in the upper reducing channels and the lower reducing channels respectively. A hollow cylindrical ring is arranged between the sheath and the clamping sleeve. Lead grooves are formed in the sheath and the clamping sleeve. A cable sequentially passes through the sheath, the cylindrical ring and the clamping sleeve, and the upper flange and the lower flange are pressed and sealed through fasteners. A thermocouple temperature measuring line is led out by arranging a penetration piece on a rack; meanwhile, the sealing performance of the lead under various complex working conditions is guaranteed, the good sealing performance of the rack at thetemperature measurement lead under the complex test environment working conditions can be achieved, development of thermal oscillation test design is facilitated, and a sealing means is provided forother racks needing lead sealing.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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