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Rapid evaluation method for consistency of flow area of guider
ActiveCN119642753ASimple measurement processeasy to operateMachine part testingGas-turbine engine testingProcess engineeringEnergy consumption
The invention belongs to the field of aero-engines and gas turbines, and particularly relates to a rapid evaluation method for the consistency of the flow area of a guider, the flow area of the guider is evaluated by adopting a comparison method, a small-group ASME nozzle and a large-group ASME nozzle are prepared respectively, and a test system is established to calculate the relative geometric area of the two ASME nozzles, so that the consistency of the flow area of the guider is evaluated. The batch-produced to-be-detected guiders are placed in the same environment for detection, and the effective circulation area of each batch-produced to-be-detected guider is obtained through interpolation according to the interpolation calculation formula; and comparing the effective flow area values of the to-be-tested guiders produced in batches with the standard guiders to complete the consistency evaluation of the effective flow areas of the guiders produced in batches. The method has the advantages that the flow area is evaluated quickly, the measurement process is simple, and measurement within one hour can be realized; the guider does not need to be additionally processed, so that the operability is good; normal-temperature, low-speed and low-pressure air is used as a circulation medium, so that the measurement energy consumption is low; measurement parameters are few, and use is convenient.
Owner:AECC SHENYANG ENGINE RES INST
Adjustable gauge stand for measuring side edge size of guide wheel blade groove
ActiveCN222598704USimple measurement processImprove work efficiencyClassical mechanicsControl theory
Owner:GUIYANG AVIC POWER PRECISION CASTING
Method and equipment for detecting battery cell pole piece of lithium ion battery
PendingCN119290923ASimple measurement processresource optimizationSecondary cellsUsing wave/particle radiation meansElectrical batteryImage detection
The embodiment of the invention provides a method and equipment for detecting a battery cell pole piece of a lithium ion battery, and the method for detecting the battery cell pole piece of the lithium ion battery comprises the steps: obtaining an X-ray transmission image of a to-be-detected battery cell pole piece; cutting the X-ray transmission image to obtain an angular position pole piece image and a main body pole piece image; detecting the angular position alignment degree of the to-be-detected battery cell pole piece through the angular position pole piece image to obtain an angular position alignment degree detection result; and detecting the folds of the main body of the to-be-detected battery cell pole piece through the main body pole piece image to obtain a main body pole piece fold detection result, so that the angular position pole piece alignment degree and the main body pole piece folds of the lithium ion battery can be measured on the same equipment, the battery cell measurement process is optimized, the newly purchased and used equipment and the manpower resource configuration are reduced, and the measurement efficiency is improved. And the cost is reduced.
Owner:ZHEJIANG LIWINON ENERGY TECHNOLOGY CO LTD
Grain friction coefficient measuring device and measuring method thereof
PendingCN119290736Aimprove coherenceSimple measurement processUsing mechanical meansMaterial analysisStatic friction coefficientFrictional coefficient
According to the grain friction coefficient measuring device and the measuring method thereof, the sensor is used for judging grain falling, the inclination angle during static friction measurement is controlled through a sensor signal, the precision is high, measurement is carried out according to multiple grains falling for multiple times, the measuring efficiency is high, and the measuring precision is high. And the static and dynamic friction coefficients of the same sampling batch can be continuously measured. According to the measuring method, the average angle is calculated through weight of different falling angles and the number of multiple grains sampled at a time, and the method is closer to a static friction test of a comprehensive whole. Comprising a static friction measuring table used for measuring the static friction coefficient, and a disc collecting bin mechanism used for receiving materials falling from the static friction measuring table at different inclination angles; the single-grain discharging mechanism is used for receiving the materials output by the discharging holes and discharging the materials in a single-grain mode. And the dynamic friction coefficient measuring mechanism is used for receiving the material falling from the single grain discharging mechanism and measuring the dynamic friction coefficient of the grains.
Owner:HENAN UNIVERSITY OF TECHNOLOGY
Numerical control machine tool space position calculation method based on BP neural network correction
PendingCN121956804Areduce dependenceSimple measurement processProgramme controlComputer controlNumerical controlAlgorithm
The invention discloses a numerical control machine tool spatial position calculation method based on BP neural network correction. The method comprises the following steps: establishing a spatial error geometrical relationship model; planning a measurement track and measurement points, presetting theoretical position coordinate data of each measurement point, and obtaining actual measurement position data; geometric error parameters are obtained based on actual measurement position data and substituted into the space error geometric relation model, and a machine tool space error model is obtained; obtaining error calculation coordinate data in combination with the theoretical position coordinate data and a machine tool space error model; the theoretical / actual measurement / error calculation position coordinate data are used for BP neural network training, and a neural network correction model is obtained; and correcting the position coordinate data of the machine tool space points by using the neural network correction model to obtain corresponding actual position coordinate data. According to the method, a technical path of decoupling an error source through geometric modeling, fitting nonlinear features through a BP neural network and optimizing a model through data driving is adopted, and a solution with theoretical preciseness and engineering practicability is provided for high-precision machining of the machine tool.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP
A tool for detecting the perpendicularity of a field wall column form
ActiveCN224285927UAvoid climbing framesSimple measurement process
This utility model discloses a tool for detecting the verticality of on-site wall and column formwork, relating to the field of building construction. The technical solution includes an F-shaped measuring rod, which consists of a vertical section, a top horizontal bar fixedly mounted at the top of the measuring rod, and a middle horizontal bar fixedly mounted in the middle of the measuring rod. A plumb bob is tied to one end of the top horizontal bar near the measuring rod, and an inverted triangular positioning plate is integrally connected to the other end. A scale plate is fixedly mounted at the lower end of the vertical section of the measuring rod. The scale plate is arc-shaped, with its center coaxial with the mounting axis of the plumb bob, and scale lines are provided on the scale plate. The beneficial effects of this utility model are: simplifying the data measurement process at the top of the formwork, improving data accuracy, avoiding personnel climbing the scaffold, and reducing safety risks.
Owner:THE SECOND CONSTR OF CHINA CONSTR EIGHTH ENG DIV +1
Magnetic levitation line power rail measuring scale
ActiveCN224211074Uquick measurementaccurate measurementMechanical measuring arrangementsRailway auxillary equipmentControl engineeringMeasuring ruler
The utility model discloses a magnetic levitation line power rail measuring scale, which comprises a measuring frame and a plurality of measuring parts, the measuring frame comprises an upper positioning piece and a lower mounting piece, the upper positioning piece is internally provided with a positioning groove, the positioning groove is used for nesting, fitting and abutting against a magnetic levitation rail functional piece, and the lower mounting piece is provided with a plurality of positioning holes. One end of the lower mounting part is connected to the bottom of the upper positioning part, the other end of the lower mounting part horizontally extends in the direction close to the power rail, the other end of the lower mounting part is provided with a measuring groove, the measuring groove is used for nesting the power rail, the multiple measuring parts are connected to the lower mounting part, and the measuring parts are connected to the lower mounting part. And the plurality of measuring parts extend into the measuring groove and are used for measuring the power rail. The power rail can be rapidly and accurately measured, the measurement process is simplified, the measurement efficiency is improved, the maintenance cost is reduced, it is ensured that the installation position of the power rail meets the design requirement, and safe and stable operation of a maglev train is guaranteed. Meanwhile, the method has a wide application prospect.
Owner:SHANGHAI MAGLEV TRANSPORTATION DEVELOPMENT CO LTD
A placement tool for assisting an instrument in measuring a chamfered surface of a plate
ActiveCN224334300UPlace stableNo displacement will occurMeasurement devicesWork holdersMeasuring instrumentBearing surface
The utility model relates to a kind of for the placement tool of auxiliary instrument measurement board chamfer surface, belong to the technical field of measuring equipment, including tool base, tool base is equipped with the first bearing surface and second bearing surface of inclination setting, first bearing surface and second bearing surface present certain angle, first bearing surface is equipped with first protection plate, and second bearing surface is equipped with second protection plate;Board is placed in tool base, and board large surface is in abutment with first protection plate, and board side is in abutment with second protection plate, and board chamfer surface is perpendicular to the lens axis of measuring instrument. By inclination setting and the first bearing surface and the second bearing surface of angle and corresponding protection plate, form stable support structure, ensure that board does not displace or shake in the process of measurement, and the chamfer surface of auxiliary support after the board to be detected is perpendicular to the lens axis of measuring instrument alignment, to greatly improve measurement accuracy and efficiency.
Owner:JINAN OPTICAL MICRO SEMICON TECH CO LTD
Potassium ion concentration measuring reagent, measuring method and kit
ActiveCN119198601BImprove stabilitySimple measurement processMaterial analysis by observing effect on chemical indicatorColor/spectral properties measurements
The invention discloses a potassium ion concentration measuring reagent. The measuring reagent is a single agent, comprising: a buffer, a coenzyme, an acetaldehyde dehydrogenase, a reaction substrate, a surfactant, a protective agent and a stabilizer; or the measuring reagent is a double agent reagent composed of a reagent 1 and a reagent 2, wherein the reagent 1 comprises: a buffer, an acetaldehyde dehydrogenase, a reaction substrate, a surfactant, a protective agent, a stabilizer and a diaphorase or a coenzyme; and the reagent 2 comprises: a buffer, a coenzyme and a diaphorase, a surfactant, a protective agent and a chromogen substrate; the buffer is a Tris-HCl buffer, and the pH value of the Tris-HCl buffer is 7-8.5; the coenzyme is one of NAD+ or NADP+; the reaction substrate is an aldehyde compound; the chromogen substrate is an NBT substrate or an INT substrate; the surfactant is a Triton series or Tween series surfactant; the protective agent is a mixed solution of one or more of BSA, sucrose and trehalose; and the stabilizer is a mixed solution of one or more of polyols; and a potassium ion concentration measuring method and a corresponding kit are also disclosed.
Owner:北京中生金域诊断技术股份有限公司
A device and method for dynamically monitoring a pressure relief borehole collapse in a coal mine
ActiveCN116696480BSimple measurement processimprove accuracyMining devicesEnergy saving control techniquesHemt circuitsMechanical engineering
The application discloses a device for dynamically monitoring hole collapse of pressure relief drilling in a coal mine, which comprises a fixing mechanism and a measuring mechanism, the fixing mechanism comprises a fixing rod, and the fixing rod is inserted into the pressure relief drilling; the measuring mechanism comprises a power supply, wires, color-changing light-emitting diodes and annular spring rheostats, the annular spring rheostats are used for converting the pressure applied from the outside into changes in resistance values of the annular spring rheostats, a plurality of annular spring rheostats are arranged on the fixing rod at intervals, and each annular spring rheostat serves as a measuring point; each annular spring rheostat is connected with a color-changing light-emitting diode through the wires and the power supply to form a series loop, and the color-changing light-emitting diode changes color according to the current in the series loop; and the annular spring rheostats between the measuring points are connected in parallel. The device can dynamically and real-timely monitor the hole collapse in the hole, is not affected by the hole collapse of the drilling itself, has simple design principle, high operability and low cost.
Owner:ANHUI UNIV OF SCI & TECH
A non-contact high-temperature superconducting tape critical current uniformity continuous non-destructive testing device and method
PendingCN122260197Areduce manufacturing costHigh measurement accuracyMagnetic property measurementsClosed loopHemt circuits
The application discloses a kind of non-contact high-temperature superconducting tape critical current uniformity continuous nondestructive testing device and method, applied to superconducting material detection field, comprising: excitation magnet, for producing background magnetic field, excitation high-temperature superconducting tape generates magnetization current;Measuring probe, by magnetic circuit core, fluxgate sensor, copper band compensation loop is formed;Fluxgate sensor and copper band compensation loop are connected with control and measurement circuit respectively by fluxgate power supply acquisition line and copper band compensation loop power supply line;Control and measurement circuit, for when fluxgate sensor detects that net residual magnetic flux in magnetic circuit core is not 0, PID control is implemented by closed loop negative feedback, in copper band compensation loop, the magnetic flux that is equal to high-temperature superconducting tape, opposite, and according to current in copper band compensation loop when net residual magnetic flux is 0, calculate critical current.The application realizes the fast, accurate measurement of high-temperature superconducting tape critical current uniformity without depending on Hall sensor and without calibration inverse calculation.
Owner:SHANGHAI YIXI TECH DEV CO LTD
A method for optimizing a remanence measurement process in a magnetic resonance imaging system
ActiveCN115754853Breduce adverse effectsEliminate the effects ofMagnetic field measurement using flux-gate principleMagnetic field measurement using galvano-magnetic devicesMaterials scienceMR - Magnetic resonance
The application discloses a kind of optimization methods of residual magnetism measurement process in magnetic resonance imaging system, adopt positive and negative combination gradient as test gradient, the difference of the action of spin echo and gradient echo is combined with magnetic field inhomogeneity, the change of magnetic field uniformity caused by test gradient is measured, then the change of echo peak caused by the change is used to measure the strength of residual magnetism.The method avoids the reference test under the condition that test gradient is zero, overcomes the adverse effects of magnetic hysteresis on reference signal, ensures that the magnetic field distribution state when collecting echo signal in measurement process is determined and stable, eliminates the influence of test sequence on test result, so as to improve the accuracy and stability of residual magnetism measurement result.The method of the application is simple and easy to operate, can measure the spatial anisotropy of residual magnetism, can be used to evaluate the influence of residual magnetism on imaging space positioning, and is especially suitable for judging whether permanent magnetic resonance imaging system meets the requirements of space positioning for monitoring and navigation in interventional therapy.
Owner:EAST CHINA NORMAL UNIV
EIT-AT spectral feature recognition and electric field calculation device based on LabVIEW
PendingCN119414100ASimple measurement processIncrease the level of automationElectrostatic field measurementsElectrical field strengthElectric field computation
The invention relates to the technical field of electric field precision measurement, and discloses a LabVIEW-based EIT-AT spectral feature recognition and electric field calculation device, and the device comprises a signal collection module which is used for detecting a detection light signal, and carrying out the signal amplification and analog-to-digital conversion processing of the detection light signal, and obtaining a detection light digital signal; the data processing module is used for receiving the detection light digital signal and the Rydberg state parameter, calculating a frequency scale, and performing filtering conversion and peak identification on the detection light digital signal to obtain the set peak number of the noise-removed detection light digital signal and the coordinate of the set peak number; the coordinates of the set wave crest number are sorted from large to small, then a frequency scale is introduced, and the frequency spacing is calculated; the quantum parameter and electric field calculation module is used for receiving the frequency spacing and the Rydberg state parameter, calculating a transition dipole moment and calculating the electric field intensity according to the transition dipole moment and the frequency spacing; according to the invention, the measurement process is simplified, and the automation level, accuracy and efficiency of measurement are greatly improved.
Owner:GUIZHOU POWER GRID CO LTD +2
Strain reconstruction method for non-contact conduit strain measurement system
PendingCN119646366AImprove versatilityPracticalForce measurementApparatus for force/torque/work measurementCantilevered beamCatheter
The invention relates to the technical field of sensors, in particular to a strain reconstruction method for a non-contact catheter strain measurement system, which comprises the following steps of: 1, calculating any two-degree-of-freedom transfer ratio function of a catheter according to inherent characteristics of the catheter; step 2, calculating a modal shape when there is concentrated mass or not at the position carrying the strain test device; step 3, calculating an output response ratio when the loading test device has the concentrated mass and does not have the concentrated mass; and step 4, combining any two-degree-of-freedom transfer ratio function of the conduit with the output response ratio function of the concentrated mass and the corresponding position of the homogeneous beam to obtain a reconstruction proportional function of the strain of any point of the conduit on the measuring device. Data are collected through the non-contact strain measurement system, the strain value of any point of the conduit is reconstructed based on the modal analysis theory and the cantilever beam bending free vibration differential equation, and the method is good in universality, high in practicability and high in calculation efficiency.
Owner:WUHU STATE-OWNED FACTORY OF MACHINING +1
Total station device with positioning system
ActiveCN222528640Ueasy to carryAvoid affecting the positioning effectSurveying instrumentsSatellite radio beaconingMeasuring instrumentTotal station
The utility model discloses a total station device with a positioning system, and belongs to the technical field of surveying and mapping. A total station device with a positioning system comprises a total station and an RTK measuring instrument, a telescopic support is arranged on the upper portion of a shell of the total station, a rotary drum is rotatably arranged on the telescopic support, the RTK measuring instrument is fixedly arranged on the rotary drum, a handle is further fixedly arranged on the rotary drum, the handle and the RTK measuring instrument are opposite in position, and the positioning system is arranged on the rotary drum. A limiting structure is arranged between the rotary drum and the telescopic bracket; according to the utility model, the RTK measuring instrument and the lifting handle are arranged on the rotating drum, when the rotating drum rotates, the positions of the RTK measuring instrument and the lifting handle can be changed, the RTK measuring instrument can be moved to the upper part for positioning during measurement, and the lifting handle is moved to the upper part during carrying, so that the RTK measuring instrument and the total station are convenient to carry on the whole; therefore, the problem that in the prior art, the RTK measuring instrument and the total station are inconvenient to carry at the same time during field measurement is solved.
Owner:CHINALCO (ZHENGZHOU) ALUMINUM CO LTD
A positioning support for downhole control and measurement
ActiveCN224285946USave levelingsmooth goingSurveyor's staffsMovable markersClassical mechanicsMechanical engineering
This invention provides a positioning support for downhole control measurement, comprising a positioning base plate, a positioning stake at the top center of the positioning base plate, and several stabilizing columns at the bottom. A positioning reflector is sleeved on the top of the positioning stake, and an illumination lamp is provided parallel to the side of the positioning reflector. Several screw posts are provided on both the top and bottom of the positioning base plate, and the screw posts on the top of the positioning base plate are all equipped with studs. The illumination lamp is sleeved on any one of the studs. The stabilizing columns are connected to the positioning base plate through the screw posts. This invention simplifies the measurement process, reduces the workload of measurement personnel, reduces the impact of wind on measurement work, enables rapid location of target points in dim environments, improves work efficiency, and has strong practicality.
Owner:JINCHUAN GROUP NICKEL COBALT CO LTD
Automatic measuring machine for dynamic rotation of shaft parts
The invention relates to a shaft part rotation dynamic automatic measuring machine, which comprises a workbench, and a driving tool which is connected to the workbench and is used for supporting a workpiece from the bottom of the workpiece and driving the workpiece to rotate; the outer surface measuring tool is used for measuring outer surface data of the workpiece; the taper hole measuring tool comprises a measuring cylinder axially moving along the axis of the workpiece, an elastically telescopic connecting rod is connected in the measuring cylinder, and the connecting rod can float in the vertical direction; the stepped hole measuring tool comprises a detection shaft axially moving along the axis of the workpiece, a detection head for measuring the length of the stepped hole is connected to the end face of the detection shaft, and detection rods which are centrosymmetric along the axis of the stepped hole are arranged on the outer surface of the detection shaft in an extending mode and used for measuring the inner diameter size of the stepped hole of the workpiece. The device is compact and reasonable in structure, is convenient to operate, and remarkably improves the measurement efficiency and precision of different-diameter shaft workpieces through integrated automatic detection, a bottom transmission driving device, taper detection and stepped hole detection.
Owner:WUXI VGAGE MEASURING EQUIP CO LTD
A profile hole height measuring device
Owner:ZHENJIANG BAOYAN AUTO PARTS CO LTD
A thermal testing device for optical lenses
The present invention discloses an athermal test device for optical lenses, including a heating and heat preservation device for heating and heat preservation of a lens to be tested, and also including an image detection system for image detection; the image detection system includes a target generator for generating a light source and an image receiver for receiving detection light, and the image receiver is connected to a computer via a communication cable; the target generator, the lens to be tested and the image receiver are coaxial, and the light emitted by the target generator passes through the lens to be tested and is received by the image receiver. The present invention can heat and heat the lens to be tested by the heating and heat preservation device so that the lens is at different ambient temperatures, thereby performing measurements at different ambient temperatures; a motion device is used to control the displacement of the image receiver to achieve the acquisition of images at different positions (imaging and collecting images at different positions at corresponding temperatures, and finally obtaining the influence of the temperature on the imaging effect of the lens).
Owner:MOONLIGHT (NANJING) INSTR CO LTD
Measuring device for shock absorber inner tube production
The utility model relates to the technical field of damper inner tube, and disclose a kind of measuring device for damper inner tube production, including base, the top of base is fixedly connected with mounting bracket, and the outer wall of mounting bracket is provided with control display.The measuring device for damper inner tube production is provided with through-hole, pull rod, measuring plate, displacement sensor, mounting cylinder, sliding slot, spring, sliding block and long rod, and the operator makes measuring plate move up by single hand pulling pull rod, and the other hand places damper inner tube on base, then loosens pull rod, and measuring plate can be quickly moved down and adhere to inner tube surface under the spring reset effect, and the outer diameter data is accurately obtained by displacement sensor, the device greatly simplifies measurement process, significantly improves measurement efficiency, is especially suitable for the rapid detection in damper inner tube batch production scene, effectively solves the problem of long time consumption and low efficiency of prior art, so that operator can quickly obtain accurate outer diameter data.
Owner:WORKERSBEE ELECTRONICS TECH HLDG SUZHOU CO LTD
Stamping part surface oil film thickness measuring device and method based on correlation filtering
ActiveCN119468939AHigh measurement accuracyImprove anti-interference abilityUsing optical meansCorrelation filterLight filter
The invention relates to a device and a method for measuring the thickness of an oil film on the surface of a stamping part based on correlation filtering. The measuring device comprises an infrared light source, a focusing lens group, a light filtering wheel disc and a detector, a normal absorption window and a saturated absorption window are arranged on the light filtering wheel disc, and the normal absorption window and the saturated absorption window can rotate to a light path which can be detected by the detector through rotation of the light filtering wheel disc; the normal absorption window and the saturated absorption window are sealed by two transparent window sheets, and the space between the two transparent window sheets for packaging the normal absorption window is not filled; and a tested oil film sample with a certain thickness is packaged between two transparent window sheets of the saturated absorption window.
Owner:TIANJIN UNIV
Helicopter engine main connecting rod bushing locking ring inner diameter measuring device
ActiveCN222317922UGuaranteed detection efficiencyRealize measurementMechanical diameter measurementsStructural engineeringCoordinate-measuring machine
The utility model discloses a device for measuring the inner diameter of a locking ring of a main connecting rod bushing of a helicopter engine. The device comprises a leveling part, two measuring parts; wherein one of the measuring parts is fixedly connected with the leveling part and is a fixed measuring part; the other measuring part is connected with the leveling part in a sliding manner and is a sliding measuring part; the two measuring parts are used for abutting against the two symmetrical sides of a locking ring inner diameter detection area respectively. And a measuring mechanism. The measuring device is simple and practical in overall measuring process, and can adaptively correct and adjust inner diameter measuring parameters according to different inner diameters of the locking rings, so that the measuring precision is effectively improved, and the detection efficiency of the inner diameters of the locking rings is ensured. The defect that in the prior art, efficiency is low when a three-coordinate measuring machine is adopted to detect the inner diameter of a locking ring of a special-shaped structure is effectively overcome.
Owner:成都国营锦江机器厂
Picosecond-level precision time measurement method and circuit
PendingCN119395968AGuaranteed measurement accuracyReduced measurement timeElectric unknown time interval measurementHemt circuitsSelf adaptive
The invention discloses a picosecond-level precision time measurement method and a picosecond-level precision time measurement circuit, relates to the field of fluid metering, and particularly relates to a picosecond-level precision time interval measurement method and a picosecond-level precision time interval measurement circuit which remarkably improve the measurement precision by adaptively adjusting the repeated measurement times N and the measurement interval td. According to the method, low-frequency, intermediate-frequency and high-frequency clocks are utilized, staged timing is carried out, and finally a time-to-digital conversion result TDCRES is calculated. The circuit comprises a control logic and timing circuit, a plurality of clock circuits and registers, parameters can be dynamically adjusted according to precision requirements, and measurement time and power consumption are optimized.
Owner:SUZHOU ANCHAO MICROELECTRONICS CO LTD
Liquid fuel component calibration method and system based on ideal gas state equation
ActiveCN119601115AHigh precisionaccurate settingMolecular entity identificationGas analyser calibrationLiquid fuelIdeal gas law
The invention discloses a liquid fuel component calibration method and system based on an ideal gas state equation, and belongs to the technical field of fuel analysis. The method is characterized by comprising the following steps: step a, monitoring and recording the mass flow rate and mass of liquid fuel and the mass flow rate of auxiliary gas; b, obtaining mixed gas; c, recording the total flow of the mixed gas; step d, obtaining the total mole number of the mixed gas; e, calculating the mole number of the liquid fuel in the mixed gas; f-g, constructing a linear relation model, and obtaining the molar mass of the liquid fuel; and step h, calculating to obtain the components of the liquid fuel. According to the liquid fuel component calibration method and system based on the ideal gas state equation, the functions of a liquid flowmeter and a gas calibration flowmeter are organically combined, and effective calibration of the molar mass and the chemical composition of the complex liquid fuel is achieved through application of the ideal gas state equation.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Cutter offset parameter determination method, controller, equipment and storage medium
The invention relates to the technical field of machining, in particular to a cutter offset parameter determination method, a controller, equipment and a storage medium. The method comprises the steps that the tool model of a target tool is obtained; tool geometric characteristic data corresponding to the target tool are obtained from a preset tool database according to the tool model; determining a tool type according to the tool model, determining a size offset parameter of the target tool according to the geometric characteristic data and the tool type, and correcting tool measurement data according to the size offset parameter; wherein the tool measurement data refers to the tool size obtained by performing tool measurement operation on the target tool. The size offset parameters are suitable for different tool types and tool models, the accuracy of tool measurement data corrected according to the size offset parameters is improved, and the machining efficiency is improved.
Owner:深圳模德宝科技有限公司
A wellbore casing cavity three-dimensional measurement method based on omni-directional speckle structured light
ActiveCN122041764BEfficient 3D reconstructionAvoid multiple measurementsImage analysisCharacter and pattern recognitionParallaxPoint cloud
The present application belongs to the technical field of oil and gas equipment detection, and particularly relates to a wellbore casing cavity three-dimensional measurement method based on omni-directional speckle structured light. The wellbore casing cavity three-dimensional measurement method based on omni-directional speckle structured light is simple to operate, high in measurement accuracy, capable of realizing accurate reproduction of the actual appearance of the wellbore casing cavity, simplifying the existing cavity measurement process, and suitable for appearance detection of wellbore casings and complex cavities. The wellbore casing cavity three-dimensional measurement method based on omni-directional speckle structured light comprises the following steps: constructing a cavity imaging model based on monocular speckle structured light; determining a calibration workpiece; three-dimensionally calibrating the cavity imaging model based on monocular speckle structured light; preparing a speckle image; collecting an omni-directional speckle image in the cavity; expanding the collected omni-directional speckle image; calculating the final parallax of each pixel to complete three-dimensional point cloud reconstruction of the wellbore casing cavity to be measured.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Digital image correlation subset adaptive algorithm for cross-scale measurement
The invention discloses a digital image related subset adaptive algorithm for cross-scale measurement, which comprises the following steps of: firstly, intercepting sub-region windows from small to large at the central position of a speckle image; and carrying out binaryzation on the intercepted sub-area window image, and projecting a pixel point of which the pixel value is 1 after binaryzation to an X axis and a Y axis. According to a calculation rule, calculating the variance of the projection of the pixel point on the X axis and the Y axis, and calculating the difference value of the two variances; and finding a position where the variance difference value has a minimum value and tends to zero for the first time, and adaptively outputting a subset of the position. According to the method, when a DIC system measures a test sample in a cross-scale manner and processes speckle images with different characteristics under different scales, subsets with proper sizes are selected in a self-adaptive manner, the influence of human factors is eliminated, and the calculation precision of a displacement field is ensured.
Owner:GUANGXI UNIV
A flow rate tube and digital handle
This application discloses a flow velocity tube, comprising: a tube body, which is a hollow tubular structure, comprising an inlet section, a contraction section, a measuring section, and a diffusion section in sequence along the fluid flow direction, wherein the inner cavities of the inlet section, contraction section, measuring section, and diffusion section are connected to form a main channel for fluid flow; a measuring element disposed in the measuring section of the tube body, the measuring element having a front end face facing the inlet section and a rear end face facing away from the inlet section, the front end face having a total pressure tapping hole, and the rear end face or outer peripheral wall having a static pressure tapping hole; wherein, the measuring element has an independent and parallel extending total pressure channel and a static pressure channel inside, the total pressure channel being connected to the total pressure tapping hole and extending to the outside of the measuring element to connect to a pressure sensor, the static pressure channel being connected to the static pressure tapping hole and extending to the outside of the measuring element to connect to a pressure sensor, the total pressure channel and the static pressure channel transmitting total pressure signal and static pressure signal respectively, for calculating the pressure difference or flow rate of the fluid.
Owner:CHANGSHA CHANGHENG MEDICAL TECHNOLOGY CO LTD
Suspension spring point cloud data denoising method and device and computing equipment
ActiveCN119273579AImprove denoising effectImprove 3D measurement accuracyImage enhancementImage analysisAlgorithmThree dimensional measurement
The invention discloses a suspension spring point cloud data denoising method and device and computing equipment. The method comprises the steps that first point cloud data, collected by a three-dimensional sensor, of a suspension spring is acquired; determining a normal vector of each data point in the first point cloud data based on the point cloud radius neighborhood of each data point in the first point cloud data; first-layer noise data points in the first point cloud data are deleted through a region growing algorithm, second point cloud data are obtained, and the first-layer noise data points comprise all data points with the normal vector difference values between the data points and the adjacent points larger than a first threshold value; second-layer noise data points in the second point cloud data are deleted through the clustering algorithm, a normal data point set is obtained, three-dimensional measurement is carried out on the suspension spring based on the normal data point set, and the second-layer noise data points comprise all data points which are not consistent with the clustering label values of the normal data points. According to the invention, the noise in the suspension spring point cloud data can be effectively filtered, so that the three-dimensional measurement precision of the suspension spring is improved.
Owner:ADVANCED SEMICON MFG INNOVATION CENT WUXI XISHAN DISTRICT +1
A differential pressure densimeter
The present application relates to a kind of differential pressure densimeter, including probe tube, two clamp connectors are provided on the probe tube, the clamp connector is communicated with probe tube, the end of the clamp connector away from probe tube is provided with PC112K core, the PC112K core blocks the opening of clamp connector, the bottom end of the probe tube is welded with blocking piece, the diameter of the blocking piece is equal to the diameter of probe tube, the side of gauge head body is threadedly connected with gauge head connector, the gauge head connector is threadedly connected with adapter, the bottom of the adapter is threadedly connected with probe tube. Different height pressure is measured by double pressure core, density information of liquid can be quickly obtained by calculation formula, users do not need complex training to easily operate, greatly simplify the measurement process, improve work efficiency.
Owner:NANJING WOTIAN TECH