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34results about How to "Reduce the number of measuring points" patented technology
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Torsional vibration error monitoring method for shaft system of steam turbine generator unit, monitor and system
ActiveCN108716989AWon't breakWill not affect normal operationMachine gearing/transmission testingFrequency spectrumVibration acceleration
The invention discloses a torsional vibration error monitoring method for a shaft system of a steam turbine generator unit, a monitor and a system. The method includes the steps of S1, collecting output signals of rotation speed sensors, key phase sensors and bearing base vibration acceleration sensors on the steam turbine generator unit; S2, conducting Fourier transform on the collected output signal of each bearing base vibration acceleration sensor to obtain vibration spectrum signals; S3, extracting an amplitude value in the vibration spectrum signal of each bearing base vibration acceleration sensor under the corresponding rotation frequency; S4, obtaining the types of to-be-detected frequencies and separately extracting the corresponding amplitude value and phase under each type of to-be-detected frequency from the vibration spectrum signal of each bearing base vibration acceleration sensor to serve as feature parameters; S5, on the basis of a judgment principle and the extractedfeature parameters, judging whether or not torsional vibration errors of the shaft system occur in the steam turbine generator unit. By means of the method, real-time online monitoring of the torsional vibration errors of the shaft system is achieved.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Blade ice-coating failure on-line monitoring method and system based on wind generation set operation state
ActiveCN108343566AReduce the number of measuring pointsReduce in quantityMachines/enginesWind energy generationElectricityNerve network
The invention discloses a blade ice-coating failure on-line monitoring method and system based on a wind generation set operation state. According to the method, operation state data acquired by a wind generation set operation set SCADA system is utilized, and ice-coating state characteristic indexes are extracted after proper processing of the data; a built blade ice-coating diagnosis nerve network is input; and characteristic indexes which represent both the ice-coating degree of blades and the ice-coating position of the blades are output. The method is a damage-free, dynamic and real-timemonitoring diagnosis method, and a theoretical basis and technical support can also be provided for diagnosis of blade ice-coating failure in engineering practice; the whole monitoring system is simple and convenient in operation; and the method and system have large promotion value.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Fault location method for AC distribution line
ActiveCN109142986AReduce the number of measuring pointsFast dataFault location by conductor typesInformation technology support systemMeasurement pointDistribution networks
The invention discloses a fault location method for an AC distribution line, which comprises the steps of firstly setting a virtual negative sequence current vector by combining injection characteristics of negative sequence current when an AC distribution network breaks down; forming a node impedance matrix off-line according to the topological structure and parameters of the AC distribution network, and selecting rows where sparse measuring nodes are located to form a sensing matrix; measuring node voltage after the AC distribution network breaks down, calculating negative sequence voltage of the measuring nodes, and forming an underdetermined equation set together with the sensing matrix; and setting the nodes with the highest occurrence frequency of the largest element and the second largest element in the calculated virtual negative sequence current vector to be nodes at two ends of a fault area within the data window length so as to realize the location of the fault area. The method can greatly reduce the number of measuring points required by fault area location, is short in data used for fault location and can withstand transition resistance, certain noise and line parameter errors.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Jet reflection velocity field test method
ActiveCN104792493AReduce the number of measuring pointsMeasuring rake is stableHydrodynamic testingData acquisitionField tests
The invention belongs to the field of high-temperature high-speed fluid flow researches and particularly relates to a high-temperature high-speed jet reflection velocity field test method. The method is characterized by including firstly, processing an H-shaped test rake, secondly, preparing test equipment, thirdly, starting test after synchronizing a system clock with a jet generator, fourthly, processing data, and fifthly performing analysis and computation. The method has the advantages that the number of measuring points, test data volume and test start-up times are reduced to a bearable range of an external field; the ground of the external field is undestroyed while steadiness of the test rake is guaranteed, and the problem about influence on a plastic piezometric tube due to condensation and high temperature of the external field is solved; a multi-channel acquisition delay unloading method is adopted for massive real-time high-frequency dynamic sampling data, the problem of lack of bandwidth and rate of a data acquisition and storage system is solved, meanwhile data accuracy is improved, start-up times of a jet device are reduced, and test cost is saved; the problem about one-to-one correspondence of the test data and jet states is solved; and a set of data acquisition, processing and analysis method is established.
Owner:SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
Voltage monitoring and diagnosing device and method of fuel cell stack
ActiveCN101672897AMeet multi-section measurementFulfil requirementsCurrent/voltage measurementElectrical testingFuel cellsElectrical battery
The invention relates to a voltage monitoring device of a fuel cell stack, comprising a connector assembly, a measuring wiring harness and a voltage measuring unit of the fuel cell stack, wherein theconnector assembly is used for a 121-stitching machine; one end of the measuring wiring harness is respectively connected with an even number of polar plates or a three multiple number of polar plates, and the other end is connected with the voltage measuring unit of the fuel cell stack through the connector assembly used for the 121-stitching machine; and the voltage measuring unit of the fuel cell stack detects the voltage information of each measuring point, which is transmitted by the connector assembly used for the 121-stitching machine, and compares the average voltage of the fuel cell stack with the voltage information of the measuring point to determine whether the voltage of a cell positioned at the measuring point is normal. The voltage monitoring device realizes the voltage monitoring and diagnosing of a fuel cell used for a vehicle and has the advantages of low realization cost, simple structure, safety, reliability, and the like.
Owner:SUNRISE POWER CO LTD
Closed space panel acoustic contribution degree identification method
InactiveCN108051076AFew discrete pointsReduce the number of measuring pointsSubsonic/sonic/ultrasonic wave measurementIll conditioningSound pressure
The invention discloses a closed space panel acoustic contribution degree identification method. According to the method, a holographic measurement surface close to an inner surface is set at an internal portion of the closed space, sound pressure sensors are arranged on the measurement surface in a mesh mode, and the distance between adjacent grid points is less than half a wavelength; the orthogonal spherical wave superposition method is utilized to establish the transfer relationship between the sound pressure at the measurement surface and source strength of an orthogonal spherical wave source, and the source strength of the orthogonal spherical wave source is calculated; according to the source strength of the orthogonal spherical wave source, the relationship between the surface normal vibration velocity of the closed space structure and the source strength of the orthogonal spherical wave source is established; the acoustical contribution degree of a closed space panel is calculated through utilizing the sound field equivalence principle. The method is advantaged in that the method is suitable for closed sound fields in any shapes, the quantity of required measurement pointsis small, the method is simple and convenient for enforcement; due to mutual orthogonality of different orders of the orthogonal spherical wave source, the ill conditioning property of a transfer matrix is reduced, and computation accuracy is greatly improved.
Owner:NANCHANG INST OF TECH
Engineering testing method of vibration field of non-uniform arrangement structure
ActiveCN107741312ASolve the problem of optimal layout of noise measuring pointsSolve problems that are difficult to test easily and accuratelyVibration testingMonitoring systemWorkload
The invention relates to an engineering testing method of the vibration field of a non-uniform arrangement structure. Based on the condition number of a structural vibration modal matrix, vibration measuring points causing an increase of the condition number of the matrix are removed in the loop iteration process, so that reduction of the number of the measuring points and optimization of the positions of the measuring points are achieved. Then based on a mode superposition method, only measuring data of the optimized measuring points with the number reduced is adopted, and vibration field reconstruction of the whole large structure is achieved. According to the method, a few sensors are optimized for position arrangement, and the vibration response field of the whole structure is reconstructed by means of the measuring data of the sensors, so that space and weight are saved, the testing workload is significantly relieved, and a monitoring position optimization method is provided for avibration monitoring system.
Owner:CHINA SHIP DEV & DESIGN CENT
Large diameter strap-on carrier rocket modal test measurement point arrangement and optimization method
InactiveCN107702874AReduce the number of measuring pointsImprove test efficiencyVibration testingTest efficiencyMeasurement point
The present invention relates to a large diameter strap-on carrier rocket modal test measurement point arrangement and optimization method used for the space combination measurement point arrangementof a new generation large diameter strap-on carrier rocket full-rocket modal test. The method considers a combined mode of the five elastic branches of a whole rocket, a core-level large diameter storage box local mode, an engine branch mode and the like, and carries out the iterative optimization on the measurement point arrangement via a trial test method, so that the number and the positions ofthe measurement points are optimal, and the test efficiency is improved. The method can guarantee the situation that all modal parameters in an appointed frequency band can be obtained in a large-scale rocket modal test, thereby not losing the modes.
Owner:BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +1
Rotor monitoring method based on deep learning signal reconstruction
ActiveCN111707458AShort lifeAccurate and effective fault identificationMachine part testingSubsonic/sonic/ultrasonic wave measurementEngineeringNetwork model
The invention discloses a rotor monitoring method based on deep learning signal reconstruction. The rotor monitoring method comprises the following steps: 1, obtaining initial vibration signal data ofa rotor; 2, arranging the signal data into a matrix form and standardizing, and dividing to obtain a training set and a verification set; 3, building and obtaining a deep learning neural network model; 4, training a deep learning neural network model to obtain a trained reconstruction and classification model; 5, continuing training according to the error with the actual monitoring signal until the error between the vibration signal output by the model and the monitoring signal meets the preset requirement, and obtaining a trained reconstruction and classification model; and 6, realizing rotor monitoring by utilizing the trained reconstruction and classification model obtained in the step 5. According to the method, accurate rotor full-measuring-point signals can be obtained by means of monitoring signals of a few measuring points, the whole rotor and key parts can be monitored, and the accuracy of rotor fault recognition is improved.
Owner:XI AN JIAOTONG UNIV
Time domain distribution random dynamic load identification method considering spatial correlation
PendingCN113392545ASolve recognition puzzlesReduce the number of measuring pointsGeometric CADDesign optimisation/simulationTime domainSpatial correlation
The invention discloses a time domain distribution random dynamic load identification method considering spatial correlation. The method comprises the steps: S1, establishing a finite element model of an actual thin-wall structure according to the geometrical shape of the actual thin-wall structure; S2, arranging measuring points on the actual thin-wall structure, and calculating a cross covariance function matrix of the response according to the dynamic response of the measurement; S3, according to the geometric position of an actual measuring point, determining a corresponding measuring point position on the thin-wall structure finite element model, calculating a Green function between a generalized orthogonal polynomial coefficient and a measuring point response, and assembling into an identification matrix; S4, performing K-L expansion on the responded cross covariance function matrix, and identifying the time domain distribution random dynamic load through a matrix inversion method according to the identification matrix. According to the method, the external non-stationary distributed random dynamic load is identified through the structural strain response, the time-varying distribution function of the distributed random dynamic load can be accurately obtained, and the indirect method for obtaining the external distributed random dynamic load of the engineering structure is provided.
Owner:SOUTHEAST UNIV
Method for reconstructing complex morphology of flexible platy structure based on two-dimensional orthogonal curvature
InactiveCN104949628AHighlight substantiveReduce the number of measuring pointsUsing optical meansGraphicsGrating
The invention relate to a method for reconstructing a complex morphology of a flexible platy structure based on a two-dimensional orthogonal curvature. The method comprises steps of: using an optimized discrete-distributed orthogonal optical fiber grating to form a sensor network, and establishing an orthogonal curvilinear net of the platy structure by obtaining two-dimensional orthogonal curvature information of each grating measurement point on the surface of the platy structure and performing meshing of the platy structure on the basis of the continuous curvature; constructing a motion coordinate system on the orthogonal curvilinear net, calculating a relative coordinate of the measurement point in the motion coordinate system by using the motion coordinate system, and on this basis, calculating a world coordinate of the measurement point; and obtaining torsion angles of the motion coordinate system in two directions, and updating the motion coordinate system by using the torsion angles. The method requires hardware including a square flexible platy structure experiment model, an optical fiber grating sensor network which is implanted to the structure surface in an optimized distributed manner, an optical fiber grating network signal analyzer, an algorithm running and graphic processing computer, and a display.
Owner:SHANGHAI UNIV
System and method for measuring mechanical quality factor of vibrating body
ActiveCN111504586AAvoid influenceGuaranteed measurement accuracyVibration testingVibration amplitudeSignal wave
The invention belongs to the technical field of mechanical quality factor measurement, and particularly relates to a method and system for measuring the mechanical quality factor of a vibrating body.The method comprises the steps of driving an ultrasonic transducer by a detection signal wave to excite the vibration of the vibrating body, moving a vibration measuring device along the axial direction of the vibrating body, and measuring the vibration speeds and phases of a plurality of mass points at intervals of delta Z infinitesimal elements on the surface of the vibrating body; carrying outspatial Fourier transform on the vibration speed of the measurement mass points on the vibration body to obtain a frequency spectrum in a wave number space, determining a main wave number k0, removinga wave number above 1.2 k0, restoring a distribution curve of the vibration speed of the mass point in the space, calculating the energy loss delta Ed of the infinitesimal element and the reactive energy delta Er of the infinitesimal element, and obtaining the corresponding relation between the mechanical quality factor of the vibrating body and the amplitude of the vibrating body. According to the present invention, the influence of the energy loss of the connector on the measurement result is avoided in principle, the measurement precision is ensured, the whole calculation process is simpleby using a method of firstly analyzing the infinitesimal and then analyzing the whole through the infinitesimal, and the large-scale application can be carried out.
Owner:吴疆
Air flow measuring method based on bell mouth flow tube speed distribution model
ActiveCN114528778AHigh measurement accuracyImprove measurement efficiencySustainable transportationDesign optimisation/simulationInlet flowMeasurement precision
The invention discloses an air flow measurement method based on a bell mouth flow tube speed distribution model, and belongs to the field of aero-engine air inlet flow measurement. The implementation method comprises the steps of determining a point distribution range of a pressure measurement rake on a measurement section in a test according to an in-pipe speed distribution model, then performing data measurement of a small number of points on the measurement section to obtain an in-pipe complete speed distribution model, performing integral calculation on the obtained in-pipe complete speed distribution model to obtain in-pipe air flow, and calculating the in-pipe air flow according to the in-pipe air flow. And the air inlet flow of the aero-engine is measured. According to the method, the in-pipe velocity distribution model is divided into the constant section, the linear section, the logarithmic section and the velocity distribution characteristics of all the sections, the point distribution range and the point distribution number of the pressure measurement rakes on the measurement section for calibrating the in-pipe velocity distribution model are selected in a segmented mode, accurate measurement point distribution is achieved, the number of measurement points can be reduced, and the measurement accuracy is improved. On the premise that the measurement precision of the air inlet flow of the aero-engine is guaranteed, the flow measurement precision and the measurement efficiency are improved.
Owner:BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
Railway curve mapping method based on satellite positioning
ActiveCN109883317AEfficient and intelligent surveying and mappingReduce the number of measuring pointsElectric/magnetic contours/curvatures measurementsSatellite radio beaconingMeasurement pointReference line
The invention relates to a railway curve mapping method based on satellite positioning. The railway curve mapping method based on the satellite positioning comprises the following steps that (1) a reference line is determined, specifically, a measuring starting point is determined, a datum point in a pre-set distance away from the measuring starting point on a railway is determined, and the connecting line of the measuring starting point and the datum point is taken as a reference line; (2) a first key mapping point is determined, specifically, the included angle of the connecting line of thecurrent position and the datum point and the reference line and the distance of the connecting line are calculated in real time, when the included angle and the distance of the connecting line of thecurrent position and the datum point reach the pre-set condition, the first key mapping point is reached according to prompts, mapping of the first key mapping point is completed, the mapping circuitdiagram is automatically refreshed, and the connecting line of the first key mapping point and the datum point is set to be a first reference connecting line; (3) a second key mapping point is found out to map; (4) the step (3) is repeated until a mapping destination is reached; and (5) the overall length of the railway curve is calculated. According to the railway curve mapping method based on satellite positioning, key mapping points can be automatically found out, the quantity of the measuring points in a controllable error is reduced, and the measuring precision is high.
Owner:株洲太昌电子信息技术股份有限公司
Method for aligning circumference equipartion same type small-sized equipment group
InactiveCN101261109BReduce the number of measuring pointsReduce the number of measurementsSurveying instrumentsMechanical measuring arrangementsSheet steelMeasurement point
The invention relates to a method for aligning the circumference distribution of a small equipment group with the same type, which is characterized in that the method comprises the steps as follows: a template frame is prepared; the central points of the radius arc line of a first supporting roller and a second supporting roller, a fourth supporting roller and a fifth supporting roller are found out and marked by a total station instrument based on the supporting roller equipment; the two central points are marked on a channel steel template; the measurement points required by the alignment of the second supporting roller, the third supporting roller and the fourth supporting roller which are below the channel steel are marked through an auxiliary steel plate by the total station instrument on the channel steel template, and the three supporting rollers are aligned by the measurement points which are the measurement points required by the alignment of the second supporting roller, thethird supporting roller and the fourth supporting roller. The method for aligning the circumference distribution of the small equipment group with the same type is characterized by high alignment precision and high working efficiency.
Owner:CHINA FIRST METALLURGICAL GROUP
Method for determining optimal measuring point number of free-form surface detection
PendingCN114295095AImprove detection efficiencyReduce the number of measuring pointsMeasurement devicesComplex mathematical operationsGray colorAlgorithm
The invention aims to provide a free-form surface detection optimal measurement point number determination method, which comprises the following steps of: setting four groups of test schemes, and carrying out surface detection to obtain four groups of shape errors; if the four groups of shape errors are all smaller than the shape tolerance, adding a group of schemes with more measuring points as a fifth group of testing schemes; constructing a gray prediction GM (1, 1) model, and predicting to obtain a fifth group of prediction shape errors; based on the gray interval range, judging whether the processing technology has problems or not; according to the fifth group of test schemes, performing curved surface detection by adopting a high-precision three-coordinate measuring machine to obtain a fifth group of shape errors; comparing whether the absolute value of the difference between the last two groups of detected shape errors is smaller than a threshold value or not, and if so, obtaining an optimal free-form surface measuring point number; otherwise, deleting the first group, changing the second to fifth groups into new first to fourth groups, then adding a scheme of more measuring points as a new fifth group, and repeating the steps. The detection efficiency can be improved.
Owner:GUANGXI UNIVERSITY OF TECHNOLOGY
Generator set stator structure and stator measuring point arrangement method
PendingCN114301193AAvoid influenceReduce distractionsAssociation with control/drive circuitsForce measurement by measuring optical property variationControl theoryForce sensor
The embodiment of the invention provides a generator set stator structure and a stator measuring point arrangement method, relates to the technical field of hydro-generator operation on-line monitoring, and can detect whether iron core punching sheets in a stator iron core are mutually compressed or not in real time. The fastening assembly is used for keeping the stator core in a compressed state; and the force measuring assembly comprises a pressure sensor, and the pressure sensor is arranged between the stator core and the fastening assembly and is used for measuring a relative pressure value between the stator core and the fastening assembly. According to the generator set stator structure provided by the embodiment of the invention, the compression state of the stator core can be detected in real time, and a corresponding detection assembly does not need to be arranged on the core punching sheet, so that the influence on the stator core is avoided; as the detection device is arranged outside the stator core, the interference of the stator core is less, and the measurement resolution is high; the generator set stator structure provided by the embodiment of the invention adopts an assembly part nesting mode, and is high in integrity.
Owner:DONGFANG ELECTRIC MACHINERY
Online measurement system for steam concentration of gas-phase mixture and method thereof
InactiveCN112185595AEffectively reflect density parametersOptimize layoutNuclear energy generationNuclear monitoringPhase mixingGas phase
The invention discloses an online measurement system for the steam concentration of a gas-phase mixture and a method thereof. The online measurement system comprises a main gas pipe, a pressure sensor, a first temperature sensor, a second temperature sensor, a first density sensor and a second density sensor, the pressure sensor, the first temperature sensor, the second temperature sensor, the first density sensor and the second density sensor are installed on the side wall of the main gas pipe. The pressure sensor, the first temperature sensor, the second temperature sensor, the first densitysensor and the second density sensor are arranged on the same axial plane of the main air pipe. According to the method, the average temperature of the cross section is obtained through double-temperature measurement, the average density of the carrying surface is obtained through double-density measurement, the single-component density is obtained through pressure and temperature information, the steam concentration of steam mixing is obtained according to the relation between the single-component density and the average concentration of a mixture, and the method has the advantage of being high in accuracy.
Owner:NUCLEAR POWER INSTITUTE OF CHINA
Measuring system and method for mechanical quality factor of vibrating body
ActiveCN111504586BGuaranteed measurement accuracySimple calculationVibration testingVibration amplitudeSignal wave
The invention belongs to the technical field of mechanical quality factor measurement, and in particular relates to a measurement method and a measurement system for the mechanical quality factor of a vibrating body. Use the detection signal wave to drive the ultrasonic transducer to excite the vibration of the vibrating body, move the vibration measuring device along the axial direction of the vibrating body, measure the vibration velocity and phase of multiple particles at the ΔZ microelement spacing on the surface of the vibrating body, and measure the vibration of the particle on the vibrating body Do spatial Fourier transform of the velocity to obtain the frequency spectrum in the wavenumber space and determine the dominant wavenumber k 0 , remove 1.2k 0 For the above wave number, restore the distribution curve of the vibration velocity of the particle in space, and calculate the energy loss ΔE of the microelement d and the reactive energy ΔE of the element r , the corresponding relationship between the mechanical quality factor of the vibrating body and the amplitude of the vibrating body is obtained; the invention avoids the influence of the energy loss of the connector on the measurement result in principle, and ensures the measurement accuracy. The overall approach makes the whole calculation process simple and can be applied on a large scale.
Owner:吴疆
Flue partition mixer
PendingCN113181762AWell mixedImprove control qualityDispersed particle separationThermodynamicsEngineering
The invention discloses a flue partition mixer. The cross section of a flue is divided into a plurality of partitions; each partition is internally provided with a bias flow blade group; bias flow blades in the bias flow blade groups deflect along the same rotation direction; the center lines of the bias flow blades in the bias flow blade groups are tangent to the same circle; the rotating deflection directions of all the bias flow blades in the bias flow blade groups in the adjacent partitions are opposite; the mixer can achieve uniform mixing of smoke in all the partitions; and the number of the partitions is small, so that the investment cost is low.
Owner:XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD
A Fault Location Method for AC Distribution Lines
ActiveCN109142986BReduce the number of measuring pointsFast dataFault location by conductor typesInformation technology support systemElectrical resistance and conductanceComputer science
The invention discloses a fault location method for an AC distribution line, which comprises the steps of firstly setting a virtual negative sequence current vector by combining injection characteristics of negative sequence current when an AC distribution network breaks down; forming a node impedance matrix off-line according to the topological structure and parameters of the AC distribution network, and selecting rows where sparse measuring nodes are located to form a sensing matrix; measuring node voltage after the AC distribution network breaks down, calculating negative sequence voltage of the measuring nodes, and forming an underdetermined equation set together with the sensing matrix; and setting the nodes with the highest occurrence frequency of the largest element and the second largest element in the calculated virtual negative sequence current vector to be nodes at two ends of a fault area within the data window length so as to realize the location of the fault area. The method can greatly reduce the number of measuring points required by fault area location, is short in data used for fault location and can withstand transition resistance, certain noise and line parameter errors.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
A test method for jet reflection temperature field
ActiveCN104180926BReduce the number of measuring pointsMeasuring rake is stableGas-turbine engine testingTemperature measurement of flowing materialsJet flowData acquisition
The invention discloses a test method for jet reflection temperature field, which belongs to the research field of high-temperature and high-speed fluid flow, and specifically relates to a test method for high-temperature and high-speed jet reflection temperature field. It is characterized in that it includes the following steps: first, prepare test equipment, second, start testing after synchronizing the system clock with the jet flow generating device, third, data processing, fourth, analysis and calculation. The advantages of the present invention are: the number of measuring points, the amount of test data and the number of test vehicles are reduced to the range that the field can bear; it does not damage the ground of the field and ensures the stability of the measuring rake, and solves the problem of condensation and high temperature on the plastic pressure measuring tube in the field Impact: Multi-channel acquisition and delay transfer method is adopted for massive real-time high-frequency dynamic sampling data to solve the problem of insufficient bandwidth and speed of data acquisition and storage systems, while improving data accuracy, reducing the number of times the jet device is started, and saving test costs; solved the problem of testing One-to-one correspondence between data and jet flow status; a set of data acquisition, processing and analysis methods was established.
Owner:SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
A Method of Searching for Hidden Uranium Deposits in Granite Areas
ActiveCN107505659BImprove hit rateReduce the number of measuring pointsMaterial thermal analysisNuclear radiation detectionThermoluminescenceSoil science
The invention provides a method of searching for hidden uranium mine in a granite area. The method comprises: S1, determining a preliminary measurement point in a surveying area; S2, measuring uranium, thorium and potassium contents of a ground gamma-ray energy spectrum, the radon gas concentration of the surface soil or the thermoluminescence intensity of the surface soil, and a uranium component content in the surface soil at a preliminary measurement point; S3, making profile maps and planar contour maps of all measurement parameters as well as an integrated profile map and an integrated planar contour map; S4, determining and setting an abnormal prediction zone; S5, determining a final measurement point in the abnormal prediction zone; S6, measuring uranium, thorium and potassium contents of the ground gamma-ray energy spectrum, the radon gas concentration of the surface soil or the thermoluminescence intensity of the surface soil, and a uranium component content in the surface soil at the final measurement point; S7, making profile maps and planar contour maps of all measurement parameters as well as an integrated profile map and an integrated planar contour map; S8, determining and setting an abnormal prediction zone; and S9, carrying out engineering revealing. With the method provided by the invention, the searching work hit rate and the work efficiency for searching for hidden uranium mine in a granite area are improved and the mine searching cost is lowered.
Owner:佛山诸广矿业有限公司
A method of surveying and mapping railway curves based on satellite positioning
ActiveCN109883317BEfficient and intelligent surveying and mappingReduce the number of measuring pointsElectric/magnetic contours/curvatures measurementsSatellite radio beaconingEngineeringReference line
Owner:株洲太昌电子信息技术股份有限公司
A method and system for online monitoring of blade icing faults based on the operating status of wind turbines
ActiveCN108343566BReduce the number of measuring pointsReduce in quantityMachines/enginesWind energy generationElectricityNerve network
The invention discloses a blade ice-coating failure on-line monitoring method and system based on a wind generation set operation state. According to the method, operation state data acquired by a wind generation set operation set SCADA system is utilized, and ice-coating state characteristic indexes are extracted after proper processing of the data; a built blade ice-coating diagnosis nerve network is input; and characteristic indexes which represent both the ice-coating degree of blades and the ice-coating position of the blades are output. The method is a damage-free, dynamic and real-timemonitoring diagnosis method, and a theoretical basis and technical support can also be provided for diagnosis of blade ice-coating failure in engineering practice; the whole monitoring system is simple and convenient in operation; and the method and system have large promotion value.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
A test method for jet reflection velocity field
ActiveCN104792493BReduce the number of measuring pointsMeasuring rake is stableHydrodynamic testingData acquisitionKnowledge Field
The invention belongs to the research field of high-temperature and high-speed fluid flow, and in particular relates to a test method for high-temperature and high-speed jet reflection velocity field. It is characterized in that, firstly, measuring rakes for the shape of the processed soil; secondly, preparing test equipment; thirdly, starting the test after synchronizing the system clock with the jet flow generating device; fourthly, data processing; fifthly, analyzing and calculating. The advantages of the present invention are: the number of measuring points, the amount of test data and the number of test vehicles are reduced to the acceptable range of the outfield; the ground of the outfield is not damaged and the rake is stable, and the problem of condensation and high temperature in the outfield on the plastic pressure measuring tube is solved Impact: Multi-channel acquisition and delay transfer method is adopted for massive real-time high-frequency dynamic sampling data, which solves the problem of insufficient bandwidth and speed of data acquisition and storage systems, improves data accuracy, reduces the number of times the jet device is started, and saves test costs; solves the problem of testing One-to-one correspondence between data and jet flow status; a set of data acquisition, processing and analysis methods was established.
Owner:SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
Reconstruction method of complex shape of flexible plate structure based on two-dimensional orthogonal curvature
InactiveCN104949628BReduce the number of measuring pointsSmall amount of collected dataUsing optical meansGratingMeasurement point
The invention relates to a method for reconstructing the complex shape of a flexible plate structure based on discrete distributed two-dimensional orthogonal curvature. The two-dimensional orthogonal curvature information of each grating measuring point, and on the basis of continuous curvature, carry out grid division on the plate structure, and establish an orthogonal curve network of the plate structure; construct a motion coordinate system on the orthogonal curve network, Use the motion coordinate system to calculate the relative coordinates of the measurement points in the motion coordinate system, and calculate its global coordinates on this basis; obtain the torsion angle of the motion coordinate system in two directions, and use the torsion angle to update the motion coordinate system. The hardware environment required for this method includes a square flexible plate structure experimental model, an optical fiber grating sensor network with optimized distribution implanted on the surface of the structure, an optical fiber grating network signal analyzer, an algorithm operation and graphics processing computer, and a display .
Owner:SHANGHAI UNIV
Voltage monitoring and diagnosing device and method of fuel cell stack
ActiveCN101672897BRequirements for reducing the number of measurement harnessesLow costCurrent/voltage measurementElectrical testingFuel cellsMeasurement point
The invention relates to a voltage monitoring device of a fuel cell stack, comprising a connector assembly, a measuring wiring harness and a voltage measuring unit of the fuel cell stack, wherein the connector assembly is used for a 121-stitching machine; one end of the measuring wiring harness is respectively connected with an even number of polar plates or a three multiple number of polar plates, and the other end is connected with the voltage measuring unit of the fuel cell stack through the connector assembly used for the 121-stitching machine; and the voltage measuring unit of the fuel cell stack detects the voltage information of each measuring point, which is transmitted by the connector assembly used for the 121-stitching machine, and compares the average voltage of the fuel cell stack with the voltage information of the measuring point to determine whether the voltage of a cell positioned at the measuring point is normal. The voltage monitoring device realizes the voltage monitoring and diagnosing of a fuel cell used for a vehicle and has the advantages of low realization cost, simple structure, safety, reliability, and the like.
Owner:SUNRISE POWER CO LTD
A wind turbine blade condition monitoring method and system based on vibration detection and wireless signal transmission
ActiveCN107061185BThe principle is simpleEasy to implementGeometric CADEngine fuctionsLoss rateVibration acceleration
Owner:GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST +1
A monitoring method for starting and receiving wells and pipe jacking construction
ActiveCN106894821BEffective four-dimensional spaceGuaranteed continuityTunnelsEngineeringContinuous monitoring
The invention discloses a monitoring method for an original well, a receiving well and pipe jacking construction. The monitoring method comprises the steps that (1), construction is prepared on site; (2), monitoring points are selected, and monitoring instruments are arranged on monitoring sections of the monitoring points; (3), monitoring frequency is made, and information is collected; (4), collected information data are recorded, analyzed and treated, and a monitoring statement is obtained; (5), a monitoring warning index value is made; and (6), the reasonability and scientificity of the construction process are evaluated according to the monitoring statement and the monitoring warning index value. On the basis of common monitoring items, the monitoring items are combined organically, and the tested data can be mutually checked. Continuous monitoring is conducted in construction engineering to guarantee the continuity of the data; monitoring point arranging is reduced by utilizing the system effect, so that the cost is saved; and by combining construction practice, the testing method and the types of monitoring elements are determined, and the arranging positions of the monitoring points are adjusted, so that the influence on the construction quality is reduced.
Owner:CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG
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