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317results about How to "Realize continuous measurement" patented technology
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Laser measurement device for thickness of plate
ActiveCN102706286ARealize parallel distance adjustmentGood synchronizationUsing optical meansContinuous measurementLong arm
The invention discloses a laser measurement device for the thickness of a plate, and relates to a laser measurement device. In order to the solve the problems that as for a conventional laser measurement method, continuous measurement for the thickness of the plate can not be carried out, the technical scheme I is adopted as follows: an upper arm and a lower arm are arranged in parallel; the upper arm is connected with a side arm; the lower arm is connected with a lateral wall of a U-shaped slide rail; the side arm is connected with chutes in a sliding manner; a horizontal gear on the side arm is meshed with a gear wheel; an upper and a lower laser displacement sensors are respectively fixed on the upper and the lower arms; a long-arm clamp is fixed on a support which is fixed on one group of rollers; two groups of rollers roll along a guidance groove of a guidance rail; each group of rollers are limited through two limiting mechanisms; the side wall is fixed on a working table; the guidance rail is fixed on an upper installation base of an upper motion platform; an upper bracket of the upper motion platform is fixed on a lower installation base of a lower motion platform; and the lower motion platform is arranged in the working table. The technical scheme II is different from the technical scheme I, the side wall is fixed on the upper installation base of the upper motion platform. Due to the adoption of the device provided by the invention, continuous measurement for the thickness of the plate can be carried out.
Owner:HARBIN INST OF TECH
Method for determining indicator diagram of electrical parameters of rod-pumped well
ActiveCN104533382AThe test is convenient and practicalSimple and convenient practical measurementSurveyConstructionsWellheadDecomposition
The invention provides a method for determining an indicator diagram of electrical parameters of a rod-pumped well and belongs to the technical field of oil production of oil fields. The method aims at achieving convenient and practical measurement of the indicator diagram of the electrical parameters of the rod-pumped well on site. The method is characterized in that top dead center moments and bottom dead center moments are determined periodically, active powers of electrical parameters of up strokes and down strokes of the rod-pumped well are processed in a decomposition mode, and input end active power of the up strokes and the down strokes is obtained respectively and are calculated and converted into wellhead loading force; adjustment is conducted through balance blocks for operation balance of a pumping unit, actually measured data are used for further correcting the weights of the crank balance blocks of the oil pumping unit or retrieving the weights of the crank balance blocks after adjustment, actually measured active power is converted into wellhead loading force F<upper force i>, wellhead loading force F<lower force i> and superposed wellhead loading force F<upper and lower force i>, the wellhead loading force F<upper force i>, the wellhead loading force F<lower force i> and the superposed wellhead loading force F<upper and lower force i> are calculated, superposed and converted into wellhead loading force, and the indicator diagram of trends of the electrical parameters is determined before and after superposition with the crank balance blocks. According to the method, on-site testing is convenient and practical, and online automatic measurement is achieved.
Owner:哈尔滨斯特凯峰电子有限公司
Olfactory instrument and olfactory analysing method of small automatic machine
InactiveCN101000357AHigh precisionHigh degree of automationMaterial analysisSensor arrayGas detector
A pocketsize olfactory instrument consists of test box in constant temperature; pocketsize gas-sensitive transducer array operation chamber with constant temperature of 55+-0.1deg.c; pocketsize headspace gas generating unit in constant temperature and with volatile gas volume of 140ml; gas headspace automatic-sampling unit formed by stepping motor, driving element, sample feeding needle and so on; computer; accurate power supply; accurate control and test circuit.
Owner:EAST CHINA UNIV OF SCI & TECH
Miniature multifunctional human body attitude intelligent detecting instrument and method
InactiveCN101504424AEasy to handleRealize continuous measurementAcceleration measurementIndication/recording movementInformation processingHuman body
The invention discloses a miniature multifunctional human body posture intelligent detector and a detection method, and belongs to the field of human body posture detection. The detector comprises a posture sensing and detecting unit, an A / D converting unit, an information processing unit, a memory unit, an input unit, an output unit and a power supply unit, and is characterized in that: sensors adopted by the posture sensing and detecting unit are a horizontal accelerometer and a vertical accelerometer. The detector utilizes accelerometers as posture sensors, and provides kinematical parameters under partial motion states for examinees, wherein the motion states mainly include running, rapid walking, jumping and the like, and the parameters include running or walking frequency, kinematic velocity, jumping height and distance, and angle and speed of rising to jump. The detector can provide posture information in the maximum range for people in need of posture correction, comprises posture detection under various conditions such as relative rest, walking or taking a bus and the like of the examinees, and realizes prompt type active posture correction and good habit cultivation.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Epidermal-electronics-based health monitoring system
ActiveCN103445763AImprove portabilityRealize continuous measurementDiagnostic recording/measuringSensorsSkin surfaceMonitoring system
The invention discloses an epidermal-electronics-based health monitoring system, which comprises a sensing unit and a portable signal processing unit, wherein the sensing unit is in an epidermal electronic patch form, is adhered to the skin surface of a monitored object, and is used for acquiring and storing the physiological parameter data of the monitored object; the portable signal processing unit is in signal connection with the sensing unit, and is used for reading and displaying the physiological parameter data stored in the sensing unit, and giving an alarming prompt or calling for assistance when the physiological parameter data exceeds a preset threshold value. The invention also discloses other embodiments of the health monitoring system. According to the epidermal-electronics-based health monitoring system, various problems of a conventional wearable health monitoring system can be successfully solved; the epidermal-electronics-based health monitoring system has the advantages of low cost, convenience for control, real-time monitoring and carrying, high measurement accuracy, multipoint measurement and the like.
Owner:HUAZHONG UNIV OF SCI & TECH
On-line monitoring system of navigation equipment and method thereof
ActiveCN105466453AAccurately reflectRealize continuous measurementMeasurement devicesVHF omnidirectional rangeMeasurement point
The invention relates to an on-line monitoring system of navigation equipment and a method thereof. The monitoring system comprises a test antenna, a GPS antenna, an antenna control module, a radio frequency acquisition and processing module, a signal analysis module and a central controller module. The test antenna is used for obtaining instrument landing system ILS / VHF Omnidirectional Range VOR spatial signals. The GPS antenna is used for receiving satellite signals. The antenna control module transmits signals received by the test antenna and the GPS antenna to the radio frequency acquisition and processing module. The radio frequency acquisition and processing module carries out filtering, demodulation and calculation on the received signals to obtain relevant parameter data and transmits the relevant parameter data to the signal analysis module. The signal analysis module analyzes the received data and transmits analysis results to the central controller module. According to the invention, accurate position measuring points of navigation channels can be determined, and measuring precision and accuracy of the on-line monitoring system of the navigation equipment are enhanced.
Owner:THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
Blood pressure measuring method and embedded device for realizing method
ActiveCN103976721ACause interferenceRealize continuous measurementMedical simulationEvaluation of blood vesselsMedicineBlood pressure
The invention provides a blood pressure measuring method. The blood pressure measuring method comprises the steps of obtaining the pulse contour of a measured object and extracting a plurality of characteristic points from the pulse contour according to preset rules; selecting an optimum blood pressure measuring model group from a model library according to the physiological indexes of the measured object and loading the optimum blood pressure measuring model group; running the optimum blood pressure measuring model group to perform calculation according to the characteristic points to obtain the blood pressure parameters of the measured object. Correspondingly, the invention additionally provides an embedded device capable of realizing the blood pressure measuring method. By implementing the blood pressure measuring method, different optimum blood pressure measuring model groups which are suitable for different measured objects can be correspondingly selected aiming at different types of measured objects, so as to obtain more accurate blood pressure parameters.
Owner:辛勤
High frequency image acquisition system for measuring flow rate
InactiveCN102393193AFast samplingIncrease profitPhotogrammetry/videogrammetryFluid speed measurementOptoelectronicsCaliber
The invention relates to a high frequency image acquisition system for measuring a flow rate, and belongs to the technical field of water conservancy measurement. The system comprises a high speed camera, a lens, a continuous laser and a combination lens, and is characterized in that: the high speed camera is provided with a 50mm large-caliber lens adaptor; the lens has an F1.0 / 50mm large-caliberaperture; the continuous laser is a low-power continuous laser with the maximum power of 2-5W; and the combination lens can convert light beams emitted by the laser into 1mm-thickness rectangular plane light. The system can acquire images economically and safely at high frequency and high quality so as to continuously measure the flow rate of an open channel or a pipeline.
Owner:TSINGHUA UNIV
System for soil compactness measurement and automatic adjustment of finely prepared land
The invention provides a system for soil compactness measurement and automatic adjustment of finely prepared land. The system includes a soil compactness measurement mechanism, a compression depth automatic adjustment mechanism and a controller; the soil compactness measurement mechanism includes vertical pulling pressure transducers, horizontal pulling pressure transducers and monitoring wheels;the compression depth automatic adjustment mechanism includes a transverse girder, an electric cylinder and a compression roller; the controller collects the acting force performed by the soil on themonitoring wheels in the horizontal and vertical directions and measured by the pressure transducers, and obtains the soil compactness after fine soil preparation online according to a created relationship model of force performed on the monitoring wheels, the compression depth and the soil compactness; the controller feeds back and adjusts the compression depth of the compression roller in real time according to the relationship between the compression depth and the soil compactness to make the soil compactness maintain within a set target value range, and the soil compactness can meet agricultural technological requirements of planting of different crops. The system can effectively prevent differentiation of the soil compactness due to unreasonable compression depth, improve the operation quality of fine soil preparation machines and the adaptability of the fine soil preparation machines to different soil environments.
Owner:JIANGSU UNIV
System and method for carrying out well logging by utilizing transient electromagnetic simulation signal
ActiveCN105626059ARealize continuous measurementEnrich the original information of formation resistivityBorehole/well accessoriesWell loggingAlternating current
The invention discloses a system and a method for carrying out well logging by utilizing a transient electromagnetic simulation signal; the system comprises three parts, i.e., a ground acquisition unit, a downhole measurement unit and a cable, wherein a ground power supply module in the ground acquisition unit is used for providing direct current (DC) or alternating current (AC) to a downhole circuit power supply in the downhole measurement unit as well as a ground synchronous processing module, a ground high-precision AD conversion circuit and a ground display storage module; the downhole circuit power supply is used for providing the current to a downhole transient electromagnetic excitation power supply for supplying power (large current) and providing the current to a downhole electronic circuit for supplying power (small current); a downhole transient electromagnetic excitation main power supply is used for providing the current to a power module. According to the system and the method, the resistivity of stratum outside a casing is obtained by continuously measuring the response of a transient electromagnetic field in a cased well, and a stratum resistivity curve needed by evaluation of remaining oil is obtained; the system and the method are not affected by contact, and are easy in construction and high in working efficiency.
Owner:BEIJING HUAHUI GEOXPLORA TECH CO LTD
Depth image based pavement detection system
InactiveCN103266552AEasy to shareRealize continuous measurementImage enhancementImage analysisTime efficientComputer module
The invention discloses a depth image based pavement detection system. The system comprises a computer, an analyzing and processing module, a kinect sensor, an inverter and a vehicle; the kinect sensor, the computer and the inverter are installed on the vehicle, and the inverter provides power for the computer and the inverter; the kinect sensor is used for acquiring pavement depth image data and transmits to the computer; and the computer calls the analyzing and processing module, analyzes and processes the obtained pavement depth image data to obtain unevenness and damage information, and displays and stores the unevenness and damage information. The pavement unevenness and damage information is obtained through pavement depth images. The system has the advantages of simple operation, convenient use and maintenance, time and money saving, and provision of picturesque pavement information for people.
Owner:JIANGSU UNIV OF SCI & TECH
Method for continuously measuring acoustic wave velocity in rock compressed crack propagation measurement process
InactiveCN102589672ARealize continuous measurementVelocity propogationUniaxial compressionRock sample
The invention provides a method for continuously measuring an acoustic wave velocity in a rock compressed crack propagation measurement process. An acoustic wave transmission probe and an acoustic wave receiving probe are fixed on the lateral side of loading a sample, and the time that the acoustic wave propagates along a direction vertical to the loading direction in a rock sample is continuously recorded by adopting a data continuous automatic recording system, so that the radial acoustic wave velocity of the rock sample in the whole uniaxial compression loaded crack propagation process is continuously measured. The acoustic wave velocity in the main direction of vertical crack development in the crack propagation process is continuously measured, so that technical support is provided to the acoustic elasticity research and application in the whole process of generating, propagating and penetrating the crack in the rock sample loading process.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Two-dimensional laser dynamic detection device and method of steel rail profiles and corrugations
ActiveCN107839714AFast measurementRealize continuous measurementUsing optical meansRailway auxillary equipmentRail profileEngineering
The invention discloses a two-dimensional laser dynamic detection device and method of steel rail profiles and corrugations. A two-dimensional laser displacement sensor is adopted to collect steel rail profile initial-data, and fixed on a walking trolley through an adjustable bracket. The walking trolley is composed of a T-shaped structural component, a walking wheel, a positioning wheel and a guide wheel, and mainly used for carrying the two-dimensional laser displacement sensor and achieving longitudinal movements along a steel rail. A coder coaxially connected with the walking wheel of thewalking trolley is used for recording the walking position of the walking trolley. Then, a series of analytical processing is conducted on the steel rail profile initial-data collected by the two-dimensional laser displacement sensor so as to complete profile deviation calculation of the steel rail profiles and corrugation analysis. The detection device can not only conduct steel rail profile dynamic-continuous-detection on a specified interval, but also conduct static detection on the steel rail profile of a specified position, and has the advantages of complete detection functions, high efficiency and the like.
Owner:CENT SOUTH UNIV
Lock-losing reset compensation device and method of SQUID magnetic sensor
ActiveCN105203978ARealize continuous measurementGuaranteed SensitivityElectrical measurementsMagnitude/direction of magnetic fieldsContinuous measurementCoupling
The invention provides a lock-losing reset compensation device and method of an SQUID magnetic sensor. The device comprises a reference SQUID magnetic sensor, a second SQUID device, a second feedback coil and a second read-out circuit. The second SQUID device and the SQUID magnetic sensor share one signal input coil, and the coupling degree between the second SQUID device and the signal input coil is lower than the coupling degree between an SQUID device in the SQUID magnetic sensor and the signal input coil. The second feedback coil and the second read-out circuit convert magnetic flux induced by the second SQUID device into a second voltage signal. According to the characteristic that working points of a first SQUID magnetic sensor respectively before and after lock-losing are different by N (N is an integer) magnetic flux quanta, A lock-losing compensation module utilizes the variable quantity of the second voltage signal to obtain the offset amount of the working points of the first SQUID magnetic sensor respectively before and after lock-losing, so that the working points of the first SQUID magnetic sensor after the lock-losing are compensated to be consistent with the working points before lock-losing. According to the invention, continuous measurement of the SQUID magnetic sensor before and after lock-losing reset is realized, and the high sensitivity and the large measuring range of the SQUID magnetic sensor are realized.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Method for continuously detecting content of sulfite and sulfide in building material and geological material
ActiveCN103063781AHigh sensitivityNo distractionComponent separationIon chromatographyPotassium hydroxide
The invention discloses a method for continuously detecting content of sulfite and sulfide in a building material and a geological material. The method comprises the following steps of: collecting a sample of the building material or the geological material, dissolving the sample together with hydrochloric acid and stannous chloride in a closed container, taking out released sulfur dioxide and hydrogen sulfide by using highly pure nitrogen or argon airflows, absorbing by using sodium hydroxide or potassium hydroxide solution, detecting the concentration of sulfite ions generated in the absorbed solution by using ion chromatography, thus obtaining the content of the sulfite through calculation; and oxidizing the absorbed solution by using hydrogen peroxide, wherein both the sulfite and the sulfide are oxidized into sulfate, detecting the concentration of sulfate ions by using the ion chromatography, and then obtaining the content of the sulfide by the measured concentration of the sulfate ions and the measured concentration of the sulfite ions through the calculation (subtraction method). The method plays an important role in detecting the content of the sulfite and that of the sulfide in the building material and the geological material, and the application prospect is brilliant.
Owner:CHINA TEST & CERTIFICATION INT GRP CO LTD
Automatic testing device for contact resistor made of electrical contact material
InactiveCN103149442AAutomatic control continuousAccurate measurementResistance/reactance/impedenceAutomatic controlContinuous measurement
Owner:HARBIN INST OF TECH
Liquid level measurement device and method
InactiveCN104089682ARealize continuous measurementHigh measurement accuracyMachines/enginesLevel indicatorsContinuous measurementGrating
The invention discloses a liquid level measurement device and method and relates to liquid level measurement. The device is provided with a light source, a three-port circulator, a spectrograph, a liquid container to be measured and a liquid level sensor. The sensor is inserted into the liquid container to be measured, the other end of the sensor is connected with a first output port of the circulator, the light source is connected with the input end of the circulator, and a second output port of the circulator is connected with the spectrograph; signal light enters the circulator and then is output through the first output port of the circulator; after the signal light reaches the sensor, interference occurs at the position of a fiber bragg grating through reflection of a silver film; reflected light re-enters the circulator through the first output port of the circulator and then is output to the spectrograph through the second output port of the circulator, and the spectrum of the output light can be obtained by measuring the spectrum of the reflected light; the relation between the height of the outside liquid level and the wavelength of interference fringes can be obtained by measuring the drifting of the wavelength of the interference fringes through the spectrograph, and liquid level height can be measured through spectrum analysis. By the adoption of the liquid level measurement device and method, continuous liquid level measurement is realized, measurement accuracy is high, and safety performance is high.
Owner:XIAMEN UNIV
Organic compound for preparing wide pH fluorescence probes and application thereof
ActiveCN104341347AImprove applicabilityDetermination of a wide rangeOrganic chemistryMaterial analysis by observing effect on chemical indicatorFluorescenceContinuous measurement
The invention discloses an organic compound for preparing wide pH fluorescence probes. The organic compound is capable of carrying out combination at any ratio according to the actual requirements and being fixed on a hydrophilic polymer to further detect the pH value of a water environment. According to the organic compound, continuous measurement on the pH value can be achieved; and the efficiency, the sensitivity and the repeatability are greatly improved.
Owner:FORLIGHTS DETECTION TECH LLC SUZHOU
System and method of continuously tracking and measuring geometrical parameters of overhead line system
PendingCN107504899ARealize automatic measurementRealize continuous measurementUsing optical meansLaser rangingMeasurement device
The present invention relates to a system and method of continuously tracking and measuring the geometrical parameters of an overhead line system. The system comprises a dolly body capable of walking along a steel rail, and a measuring device and an industrial computer which are arranged on the dolly body. The measuring device is installed on the dolly body via a rotary motor and comprises an industrial camera and a laser range finder, the optical axis direction of the industrial camera and the laser emergent direction of the laser range finder are arranged parallelly, the industrial camera real-timely shoots the images of the overhead line systems above the rail and sends to the industrial computer, and the industrial computer obtains the position deviation of the emergent laser of the current laser range finder and the overhead line system, utilizes the position deviation to generate a driving signal to send to the rotary motor, and controls the rotary motor to drive the measuring device to act, so that the emergent laser of the laser range finder always irradiates to the detected overhead line system during the walking process of the dolly body, and then the laser range finder obtains the geometrical parameters of the overhead line system directly.
Owner:济南蓝动激光技术有限公司
Casing pipe leak point detection device and method
ActiveCN107299833ASimple and fast operationEasy to operateConstructionsMeasuring instrumentCoiled tubing
The invention discloses a casing pipe leak point detection device and method. A well opening packer comprises a packer body. A sealing device is arranged inside the packer body. A coiled tubing centralizer comprises an upper fixing ring and a lower fixing ring, the upper fixing ring and the lower fixing ring are connected through a spring component, data measuring instruments comprises a first ultrasonic data measuring instrument and a second ultrasonic data measuring instrument, and the first ultrasonic data measuring instrument and the second ultrasonic data measuring instrument are arranged inside a protective device. The ultrasonic principle is adopted for measurement, and the precise leak point depth judgment is the premise of rapid accident disposal. According to the casing pipe leak point detection device and method, the measurement speed is greatly improved by means of coiled tubing continuity. The coiled tubing centralizer enables the data measuring instruments to be applicable to reducing casing pipe measurement, and the damage caused when the ultrasonic data measuring instruments make contact with the inner wall of the casing pipe is avoided, meanwhile, ultrasonic signals have the abnormal sensitivity, measurement is rapid and efficient, the high applicability of the data measuring instruments and the reliability of the testing principle are achieved, and operation of leak point detection is easier, more convenient and efficient.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
System for measuring position of marine seismic streamer based on one-way hydroacoustic ranging
InactiveCN101762823AReduce distractionsIncrease the working distanceSeismic signal receiversWater resource assessmentHydrophoneSeismic survey
The invention discloses a system for measuring position of a marine seismic streamer based on one-way hydroacoustic ranging and belongs to the technical field of marine seismic survey. The system comprises a ship-borne system of a marine seismic survey ship, water surface units, underwater units, a dada cable and a power supply cable. The system adopts the position data of any three water surface units, the vertical position data of an underwater unit to be measured and the distances between the three water surface units and the underwater unit to be measured to calculate the position data of the underwater unit to be measured; and the system uses the position data of the underwater units to obtain the positions of points of the marine seismic streamer by interpolation calculation. The system adopts the one-way hydroacoustic ranging, namely, the water surface units are only provided with acoustic wave launchers and the underwater units are only provided with acoustic wave receivers, thus increasing the operating range of the hydroacoustic ranging and reducing the interference of the acoustic wave launchers in a hydrophone group; and by adopting ranging acoustic wave signals of characteristic spectra, the recognition method of the ranging acoustic wave signals by the underwater units is simplified, and the system complexity is reduced.
Owner:SHANGHAI JIAO TONG UNIV
Method for measuring blood pressure and embedded device for implementing the same
InactiveUS20170109495A1Realize continuous measurementImprove accuracyMedical simulationEvaluation of blood vesselsMedicineBlood pressure
The present invention provides a method for measuring blood pressure, the method comprising: obtaining a pulse waveform of an measured object, and extracting a plurality of characteristic points from the pulse waveform according to a preset rule; selecting and loading a best blood pressure measurement model group from a model library according to a physiological index of the measured object; and operating the best blood pressure measurement model group to obtain blood pressure parameters of the measured object by calculating according to the plurality of characteristic points. Correspondingly, the present invention further provides an embedded device that may implement the above method for measuring blood pressure. The present invention can, according to measured objects of different types, correspondingly select the best blood pressure measurement model group that is suitable for the measured object, so as to obtain the blood pressure parameters that are more precise.
Owner:XIN QIN
Device for testing rigidity of plate spring in high-temperature environment
InactiveCN103364182AReliable mechanical propertiesImprove test accuracyMachine part testingContinuous measurementMeasurement device
The invention discloses a device for testing the rigidity of a plate spring in a high-temperature environment. The current testing method is poor in testing precision, cockamamie in process and poor in universality as the current testing method is carried out after a spiral spring high-temperature testing device is transformed according to the structure and the shape of the plate spring. The device comprises a clamping device used for clamping the plate spring, a force testing device used for testing plate spring bearing loads, a lifting device used for regulating the position of the force testing device, a deflection measuring device used for measuring the deformation amount of the plate spring, a regulating device used for regulating the positions of stress action points of the plate spring, and an electromagnetic induction heating device used for stimulating the working temperature of the plate spring. With the adoption of the device for testing the rigidity of the plate spring in the high-temperature environment, the continuous measurement on different deflections and different stress action points can be realized; and the device is convenient to operate and reliable in test.
Owner:ZHEJIANG SCI-TECH UNIV
Geosynthetic material tensile sample global strain field measuring device and method
ActiveCN109696356AHigh degree of automationDoes not affect accuracyMaterial strength using tensile/compressive forcesUsing optical meansMeasurement deviceTest sample
The invention discloses a geosynthetic material tensile sample global strain field measuring device and method. The device comprises a high-definition camera, a to-be-tested sample, a computer and a data acquisition and analysis system. The high-definition camera is connected with the computer and the data acquisition and analysis system through data lines, a marking grid is arranged on the surface of the to-be-tested sample, and a lens of the high-definition camera is over against the marking grid on the surface of the to-be-tested sample. The measurement efficiency is remarkably improved, the adaptability is high, and the measurement method is simple and efficient.
Owner:HOHAI UNIV
Device and method for continuously measuring critical current of high-temperature superconducting tape
InactiveCN104133100ASimple structureReasonable designCurrent/voltage measurementDrive wheelMeasurement point
A device for continuously measuring the critical current of a superconducting tape comprises a liquid nitrogen tank, a measuring bracket arranged in the liquid nitrogen tank, and a superconducting tape motion mechanism and a measuring mechanism which are arranged on the measuring bracket. The critical current of a superconducting tape is measured by a four-lead method of crimping. A current terminal and a voltage terminal are driven by a power mechanism to move up and down to press the superconducting tape and closely contact the superconducting tape, a current signal and a voltage signal are measured, and the critical current is calculated. The length of the superconducting tape between two measuring points is adjusted by a length adjusting device. A lifting mechanism drives a plurality of driving wheels to move up and down so as to adjust the length of the superconducting tape between the two measuring points. According to the invention, the four-lead method of crimping is adopted to measure the critical current, and the measuring device is compact and simple in structure, convenient to use, and capable of measuring the critical current of a superconducting tape quickly and accurately and obtaining uniformity, defects and other information of a high-temperature superconducting long tape.
Owner:SHANGHAI SUPERCONDUCTOR TECH CO LTD
Compensating automatic measurement system and method of soil surface evaporation capacity
ActiveCN102353602AConsistent moisture contentRealize continuous measurementWeighing by removing componentMicrocontrollerEvaporation
The invention relates to a compensating automatic measurement system and a method of soil surface evaporation capacity. The system comprises a soil measure apparatus, an evaporating weighing sensor, a negative pressure compensating apparatus and a control apparatus. The soil measure apparatus comprises a chassis, a ceramic plate and soil column cylinder; a water guiding zone is arranged between the chassis and the ceramic plate, and the chassis is provided with a water-guiding hole. The negative pressure compensating apparatus comprises a water supplementing bottle connecting with the water-guiding hole through a pipeline, a negative pressure buffer bottle connecting with the water supplementing bottle through a pipeline, a negative pressure sensor and a negative pressure pump that are connected to the negative pressure buffer bottle successively through pipelines, and a tensiometer ceramic head connecting with another negative pressure sensor. The control apparatus comprises a singlechip, a click circuit, an A / D converter, a data memory device, a communication interface circuit, a power supply and a drive circuit; the A / D converter transmits data collected by the two negativepressure sensors to the singlechip; the click circuit controls time intervals of collecting data from the evaporating weighing sensor and the compensating apparatus and inputs the data to the data memory device through the A / D converter. The invention can be widely applied to measurements of evaporation capacities of various field soil.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
Micro-particle weighing sensor of V-shaped folding cantilever beam structure
InactiveCN102954829APrecise positioningHigh sensitivityWeighing apparatus using elastically-deformable membersWeighing by absorbing componentElectricityCantilevered beam
The invention discloses a micro-particle weighing sensor of a V-shaped folding cantilever beam structure, belonging to the field of a precise particle mass detection sensor. A micro mass sensor comprises a fixed block, a V-shaped folding cantilever beam structure and a piezoelectric thin film, and is characterized in that the upper surface of the V-shaped folding cantilever beam connected to the fixed block is connected with the piezoelectric thin film, wherein the top or tops of a single or a plurality of V-shaped folding grooves which are arranged along the axis is or are used as a main detection point or main detection points; and the mass of a detected object is accurately calculated through data output of the piezoelectric thin film. The rigidity and the effective mass distribution state of the sensor are effectively changed through introduction of the V-shaped folding cantilever beam, so that the detection sensitivity of the sensor is greatly improved. Specific examples show that the sensitivity can be improved by 227 percent compared with the conventional sensor of the rectangular section cantilever beam structure. The micro mass sensor has the characteristics of simple structure, accuracy in positioning of the detected object, high sensitivity and the like, so that the sensor can be widely applied to detection of atoms, fine particles, environmental dust and microbial cells such as bacteria or viruses.
Owner:DALIAN UNIV OF TECH
Hand-held three-dimensional real-time scanning method
InactiveCN106568394AIntensive measurement resultsHigh precisionUsing optical meansContinuous measurementPoint cloud
The invention provides a hand-held three-dimensional real-time scanning method. The method comprises steps that (1), a measurement angle of a measured object is selected, and an adjacent angle superposition rate is made to be greater than 60%; (2), a measurement mode is selected, and inching measurement or continuous measurement is carried out; (3), the exposure time of a camera is adjusted according to the information of different-angle illumination and reflectivity; (4), scanning measurement is carried out by the camera according to the selected measurement mode and the selected measurement angle, namely shooting; (5), the three frequency colorful phase shift profilometry and a colorful stripe decoupling method are employed to acquire three-dimensional point cloud and a texture graph of each angle; and (6), the acquired different-angle three-dimensional point cloud acquired in the step (5) are spliced to be an integral model. The method is advantaged in that the method is applicable to most measurement objects, especially dynamic objects, the method needs no artificial mark points, and a multi-angle measurement splicing problem can be excellently solved.
Owner:XIAN CHISHINE OPTOELECTRONICS TECH CO LTD
Magnetoelectric loop wire test method for continuously applying scanning magnetic field and device thereof
InactiveCN101788653AContinuous measurementOptimize time constantHysteresis curve measurementsTime functionTraining set
The invention discloses a magnetoelectric loop wire test method for continuously applying a scanning magnetic field and a device thereof and relates to a performance test method of a magnetoelectric material and a test device thereof. The device is provided with an electromagnet, a direct current power source, a teslameter, a Helmholtz coil, a phase-locked amplifier, a function signal generator, a shield and a computer. The magnetoelectric loop wire test method comprises the following steps: connecting a sample with the input end of the phase-locked amplifier, setting the frequency of the function signal generator and a time function of the phase-locked amplifier and starting signal processing software; controlling the electromagnet to output the scanning magnetic filed and applying the scanning magnetic field on the sample; continuously acquiring the amplitude and the phase of magnetoelectric voltage as well as a magnetic field intensity value of the scanning magnetic field by the computer; carrying out signal processing on the acquired amplitude and phase and automatically setting signs of the amplitude to obtain the magnetoelectric voltage by the computer according to the rule that the magnetoelectric voltage is positive when the phase is less than or equal to zero and is negative when the phase is more than zero; and automatically producing a magnetoelectric loop in real time and saving experimental data by taking the magnetic field intensity value of the scanning magnetic field as an X axle and the magnetoelectric voltage as a Y axle through the computer.
Owner:XIAMEN UNIV
High-temperature high-pressure wedge-shaped expansion load presplitting grain stress corrosion test device
InactiveCN102944482AImplementing Stress Corrosion TestingRealize continuous measurementMaterial strength using tensile/compressive forcesSignal onData acquisition
The invention discloses a high-temperature high-pressure wedge-shaped expansion load presplitting grain stress corrosion test device which is characterized by being composed of a high-temperature high-pressure container, a sealing wire joint, a data acquisition box, a temperature controller and an industrial computer, wherein the high-temperature high-pressure container is a closed container with a jacket structure, and the closed container is formed by welding steel plates; conduction oil is filled in the jacket; aiming at the conduction oil, an electric heater is arranged; the top cover of the closed container is a flange cover; the flange cover is provided with the sealing wire joint and respectively provided with a temperature sensor and a pressure transmitter; a sample holder for placing a WOL sample is arranged in the closed container; the sealing wire joint is used for guiding a strain gauge signal on the WOL sample out of the closed container; and the industrial computer controls the internal temperature and pressure ranges of the closed container. The device disclosed by the invention can be used in a high-temperature environment of a simulated field and can be used for continuously performing a stress corrosion test.
Owner:HEFEI GENERAL MACHINERY RES INST
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