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Building measurement method and system based on three-dimensional scanning, medium and product
ActiveCN119124122Aachieve standardizationImprove measurement efficiencyGeometric CADSurveying instrumentsPoint cloudData set
The invention discloses a building measurement method and system based on three-dimensional scanning, a medium and a product, and relates to the field of exploration, and the method comprises the steps: obtaining BIM model data and a measurement parameter threshold value of a target building, and determining a subarea scanning path according to the BIM model data; scanning the target building according to the subarea scanning path to obtain a point cloud data set of the target building; generating a three-dimensional digital model of the target building according to the point cloud data set, and dividing the three-dimensional digital model into a plurality of feature regions; each feature region comprises at least one feature component; extracting a feature point set in the feature region, and establishing a mapping relationship with a corresponding point set of a corresponding region in the BIM model data; calculating actual measurement parameters of the feature region based on the mapping relation; and comparing the actual measurement parameter with the measurement parameter threshold, determining an abnormal area and generating a measurement technical report. By implementing the method, the building data can be more comprehensively acquired, and the precision of building measurement is improved.
Owner:BEIJING XINXING HUANYU INFORMATION TECH CO LTD
Intelligent lateral bending angle measuring method and system based on spine CT three-dimensional reconstruction
ActiveCN119205770Aaccurate extractionreduce subjectivityImage enhancementImage analysisSpinal columnData set
The invention relates to the technical field of image processing, and discloses a scoliosis angle intelligent measurement method and system based on spine CT three-dimensional reconstruction. The method comprises the following steps: carrying out adaptive threshold segmentation and gray optimization processing on a spine CT sequence image to obtain a standardized preprocessed image, and carrying out adaptive bone tissue region identification and boundary enhancement processing to obtain spine skeleton segmentation data; performing three-dimensional grid construction and curved surface smoothing processing on the spine skeleton segmentation data to obtain spine three-dimensional model data; carrying out centrum gap identification and key point positioning processing on the spine three-dimensional model data to obtain a centrum feature data set, and carrying out spine midline curve construction and end centrum marking processing to obtain Cobb angle data; and performing three-dimensional space reconstruction and multi-plane projection processing on the Cobb angle data to obtain a measurement result report. According to the method and the device, full-automatic processing from acquisition of the CT image to generation of the final measurement result report is realized on the premise of ensuring the measurement accuracy.
Owner:THE FIRST AFFILIATED HOSPITAL OF TIANJIN UNIV OF TRADITIONAL CHINESE MEDICINE
Building measurement method and system based on intelligent robot
ActiveCN119355747Acontinuous acquisitionquick collectionDetails involving processing stepsImage enhancementPoint cloudBuilt environment
The invention provides a building measurement method and system based on an intelligent robot, and relates to the technical field of intelligent robots, and the method comprises the steps: deploying the intelligent robot to a to-be-measured building area; determining a final driving path of the intelligent robot according to the layout of the to-be-detected building area; the intelligent robot automatically runs along the final running path, and acquires three-dimensional point cloud data, image information and geographic position information of the building environment by using an internal sensor assembly; and processing the three-dimensional point cloud data, the image information and the geographic position information of the building environment, including point cloud splicing, denoising, registration and surface reconstruction, to generate a three-dimensional model of the building. By automatically collecting and processing data, the building three-dimensional model and the detailed measurement report are efficiently generated, the measurement precision and efficiency are improved, and the labor cost is reduced.
Owner:FANGYUAN CONSTR GRP REAL ESTATE DEVT CO LTD
Fuel cell test system, method and device integrated with electrochemical AC impedance test function, processor and readable storage medium thereof
The invention relates to a fuel cell test system integrated with an electrochemical alternating current impedance test function, which comprises a fuel cell stack, an air supply unit, a fuel supply unit, a cooling supply unit, a control unit, an acquisition and driving unit and an electrochemical impedance measurement system, the output ends of the air supply unit, the fuel supply unit and the cooling supply unit are connected with the fuel cell stack, the acquisition and driving unit is connected with the fuel supply unit, the control unit is connected with the acquisition and driving unit, and the electrochemical impedance measurement system is connected with the fuel cell stack and the control unit. By adopting the fuel cell test system, method and device integrated with the electrochemical alternating-current impedance test function, the processor and the computer readable storage medium, rapid measurement and impedance calculation of electrochemical impedance in a fuel cell stack test process are realized, the integration level is high, the cost is greatly reduced, the operation is simple, and the test efficiency is high. Errors caused by repeated setting of load parameters are avoided, the measurement efficiency is high, and the measurement precision is high.
Owner:LVZHI NEW ENERGY TECH (SHANGHAI) CO LTD
Structured light three-dimensional detection system, method and device based on optical phased array coding
PendingCN119437040Aincrease flexibilityHighly adjustableUsing optical meansThree dimensional measurementLight signal
The invention relates to the technical field of three-dimensional measurement, and discloses a structured light three-dimensional detection system, method and device based on optical phased array coding, the structured light three-dimensional detection system comprises an optical phased array module, an acquisition module and a control module, the control module is connected with the optical phased array module and the acquisition module, and the optical phased array module is connected with the acquisition module and the control module. The optical coding module is used for performing phase regulation and amplitude regulation on the optical signal based on a preset regulation instruction to generate an optical coding pattern, and projecting the optical coding pattern to the surface of the to-be-measured object, so that the to-be-measured object reflects the optical coding pattern to generate reflection coding light; the acquisition module is used for acquiring the reflection coding light to obtain a reflection coding pattern; and the control module is used for generating a preset regulation and control instruction, decoding the reflection coding pattern, extracting a coding value and calculating feature information of the to-be-measured object based on the coding value. The problem that the structure light source cannot be adjusted can be solved, and the flexibility and controllability of three-dimensional detection are improved.
Owner:XIAN LUOWEI TECH CO LTD
Corrugated plate depth measurement method and system, storage medium and electronic equipment
ActiveCN119152005Areduce processingavoid missingImage enhancementImage analysisComputational sciencePoint cloud
The invention provides a corrugated plate depth measurement method and system, a storage medium and electronic equipment. The method comprises the following steps: acquiring point cloud data corresponding to a target corrugated plate through a preset line laser corrugated plate test device; according to the point cloud data, simplifying the point cloud data through a first preset method to determine target point cloud data; performing local feature extraction on the target point cloud data through a second preset method according to the target point cloud data to obtain local key point data; determining local spline point data through a third preset method according to the local key point data and the target point cloud data, and determining a local spline curve according to the local spline point data; target extreme points are determined according to the local spline curve, and the target corrugated plate depth is determined according to the distance between the adjacent target extreme points. According to the invention, the problem that there is no method for rapidly and accurately measuring the depth of the corrugated plate in the prior art is solved.
Owner:JIANGXI PROVINCIAL GENERAL INST OF INSPECTION TESTING & CERTIFICATION SPECIAL EQUIP INSPECTION & TESTING RES INST
Structural deformation measurement method based on geometric correction of multi-view panoramic camera
PendingCN119289883Aeffective securityHigh precisionImage enhancementImage analysisStructural deformationView based
The invention discloses a structural deformation measurement method based on geometric correction of a multi-view panoramic camera. A method for measuring bridge displacement by using a single multi-view panorama camera is provided, multi-view segmentation is performed on a panorama image according to a panorama camera equivalent model and a cube projection method, and independent calibration and correction are performed to obtain a distorted image capable of covering a 360-degree full-field range; therefore, a single panoramic camera is equivalent to a vertical four-camera system without overlapped view fields, so that the reference target in any direction can be used for displacement correction. The invention further provides a camera disturbance elimination method based on a multi-view circle center array target and pose transformation matrix purification optimization, and a coordinate system transformation matrix after purification optimization is obtained through a high-precision multi-feature point tracking algorithm from camera single-view moving target pose measurement. And obtaining a multi-view geometric correction theoretical model of any view of the measurement target and the reference target in a 360-degree range by utilizing a multi-view equivalent camera fixed connection relationship.
Owner:SOUTHEAST UNIV
Copper bush appearance defect detection method and system based on fusion attention mechanism
PendingCN119295389AImprove detection efficiencyImprove measurement efficiencyImage enhancementImage analysisData setRgb image
The invention discloses a copper bush appearance defect detection method and system based on a fusion attention mechanism, and the method comprises the steps: building a copper bush appearance defect detection model, collecting image data containing copper bush appearance defects, manufacturing a copper bush appearance defect data set, and dividing the copper bush appearance defect data set into a training set, a verification set and a test set; training, verifying and testing the copper bush appearance defect detection model to obtain a tested copper bush appearance defect detection model, acquiring an RGB image of a to-be-detected copper bush from a copper bush production line in real time, performing data enhancement processing, and inputting the data enhanced image into the tested copper bush appearance defect detection model for processing to obtain the copper bush appearance defect detection model. Outputting the detection target of the to-be-detected copper bush, and obtaining an appearance defect detection result of the to-be-detected copper bush according to the detection target of the to-be-detected copper bush. According to the method, the copper bush appearance defect detection efficiency can be greatly improved, and the migration and generalization ability of a copper bush appearance defect detection model is improved.
Owner:HUNAN INSTITUTE OF ENGINEERING
Photovoltaic cell film thickness real-time monitoring method and system
InactiveCN119125131AOptimizing Growth Process ParametersComprehensive reflection of thickness distributionPhase-affecting property measurementsScattering properties measurementsSensor arrayRefractive index
The invention provides a photovoltaic cell film thickness real-time monitoring method and system, and relates to the technical field of photovoltaic cells, and the method comprises the steps: setting a multi-channel optical fiber sensor array, enabling a receiving end optical fiber to collect a reflected light signal of a film, and enabling the reflected light signal to be connected into a photoelectric detector, and converting the reflected light signal into a reflected light intensity signal; preprocessing the obtained reflected light intensity signal, estimating the phase difference between adjacent cycles by using a phase unwrapping algorithm to obtain continuous thin film thickness change information, introducing a refractive index online estimation mechanism to compensate the refractive index change of the thin film material, and counting the oscillation amplitude in each cycle to obtain the refractive index of the thin film material. The real-time thickness value of the thin film is obtained in combination with compensation on the change of the refractive index; the thin film thickness distribution of the surface of the whole substrate is obtained through an intelligent interpolation algorithm, a thin film three-dimensional thickness distribution diagram is generated based on the obtained thin film thickness distribution through the graph drawing and rendering technology, and the dynamic evolution of the thin film growth process is presented in real time.
Owner:ZHEJIANG JICHU INTELLIGENT EQUIPMENT CO LTD
Three-dimensional measurement method for non-equal period phase shift
PendingCN119251276AImprove coding efficiencyGuaranteed uniformityImage analysisUsing optical meansPhase shiftedModulation pattern
The invention discloses a non-equal period phase shift phase unwrapping method, which comprises the following steps of: 1, constructing a wavelength-De Bruijn element mapping table, and generating a non-equal period phase shift stripe group; 2, projecting the phase shift fringes to a measured object frame by frame, obtaining a modulation pattern, and decoding the modulation pattern to obtain a non-linear wrapped phase; 3, constructing an approximate phase to carry out local phase unwrapping on the nonlinear wrapped phase to obtain a nonlinear local phase; and 4, calculating a phase order by minimizing a nonlinear error on the nonlinear local phase, performing phase unwrapping in combination with a nonlinear wrapped phase, and obtaining a linear absolute phase of the measured object through piecewise linear mapping. According to the measurement method, high-precision absolute phase calculation can be realized only by using three projection patterns, and the three-dimensional measurement efficiency is greatly improved.
Owner:HUNAN UNIV
Anterior segment parameter measurement method and device, electronic equipment and storage medium
ActiveCN119107380AAutomate your measurementsRealize measurementImage enhancementImage analysisOphthalmology departmentImage segmentation
The invention relates to the field of computer vision and ophthalmology medicine, and provides an anterior segment parameter measurement method and device, electronic equipment and a storage medium, and the measurement method comprises the steps: repairing a panoramic AS-OCT image based on a generative adversarial network, and eliminating a central axis and artifacts in the panoramic AS-OCT image; based on an image segmentation model, segmenting each structure of an anterior segment in the restored panoramic AS-OCT image to obtain corresponding segmented images; performing key structure positioning on the repaired panoramic AS-OCT image by using a preset positioning model to obtain a corresponding positioning result; and based on the segmented image and the positioning result, measuring anterior segment parameters related to the panoramic AS-OCT image to obtain a corresponding biological parameter measurement result. According to the invention, the automation degree, accuracy and efficiency of the measurement of the biological parameters of the anterior segment in the AS-OCT image can be greatly improved, and powerful support is provided for the diagnosis and treatment of ophthalmic diseases.
Owner:SHENZHEN EYE HOSPITAL
Inner diameter measuring device and measuring method
PendingCN119085572AThree-point inner diameter measurement implementationImprove measurement efficiencyMeasurement devicesNuclear energy generationRotary stageMeasurement device
The invention discloses an inner diameter measuring device and an inner diameter measuring method. The device comprises a measuring device main body, a vertical lifting mechanism, a rotating table and a working table, the rotating table is rotatably installed on the workbench and used for fixedly installing a to-be-tested piece so as to drive the to-be-tested piece to rotate together. The measuring device body comprises a horizontal displacement measuring head, a horizontal measuring head sealing sleeve, a shell, an air pipe, a vertical displacement measuring head and a vertical measuring head sealing sleeve. According to the method, firstly, an inner diameter measuring device is built, then a displacement measuring head measures data, then inner diameter values of all measuring positions are obtained through calculation, and the average value of the inner diameter values of all the measuring positions is adopted as the final inner diameter value of a to-be-measured piece. The three-point type inner diameter measuring device is used for measuring the inner diameter data, the elliptic equation is used for solving the inner diameter, automatic mechanical three-point type inner diameter measurement is achieved, various errors are comprehensively considered, and the measuring efficiency and the measuring precision are improved.
Owner:HEBEI UNIV OF TECH
Helicopter gear sleeve part axis pose adjusting method based on eddy current distance measurement
ActiveCN119079137Aavoid damageundisturbedSustainable transportationUsing electrical meansControl theoryMechanical engineering
The invention discloses a helicopter gear sleeve part assembly pose adjusting method based on eddy current distance measurement. The method comprises the steps of firstly building a gear sleeve part pose measurement system and establishing a measurement coordinate system, then correcting measurement errors of inner arc surface features measured by an eddy current displacement sensor, performing rotary scanning measurement by using the sensor to extract the surface profile of the part, calculating axis inclination angle information of the gear sleeve part in a rough measurement stage, and calculating the axis inclination angle information of the gear sleeve part. Then the relative pose of the sensor and the detected gear sleeve part is adjusted; and in the accurate measurement stage, coordinates of the section contour circle centers of the upper and lower inner arc surfaces are obtained, axis pose parameters of the gear sleeve part are obtained through calculation, and finally the assembly pose is adjusted. The method aims to correct the eddy current measurement error of the inner arc surface characteristic on the premise of no target, no contact and no grease interference, improves the measurement precision and efficiency of the assembly pose of the gear sleeve part, and can be used for high-precision measurement and adjustment of the axis pose of the part in the automatic assembly process of the gear sleeve part.
Owner:ZHEJIANG UNIV
Microseismic monitoring sensor arrangement method suitable for hydraulic fracturing of coal seam roof
ActiveCN119507986Aimprove accuracyImprove measurement efficiencyMining devicesMining engineeringHydraulic fracturing
The invention relates to a micro-seismic monitoring sensor arrangement method suitable for hydraulic fracturing of a coal seam roof, and belongs to the technical field of coal mining. The micro-seismic monitoring sensor arrangement method specifically comprises the following steps: S1, drilling a long hole in a roof of an auxiliary haulage roadway from one side of the auxiliary haulage roadway to a rubber belt haulage roadway, short drill holes are drilled in the rock wall between the auxiliary haulage roadway and the rubber belt haulage roadway in the direction perpendicular to the auxiliary haulage roadway, and sensors are arranged at the bottoms of the holes; s2, drilling long drill holes in the rock wall between the auxiliary haulage roadway and the rubber belt haulage roadway in the next linked roadway, drilling short drill holes perpendicular to the auxiliary haulage roadway in the rock wall between the auxiliary haulage roadway and the rubber belt haulage roadway in the direction perpendicular to the advancing direction of the working face, and arranging sensors at the bottoms of the holes; and S3, advancing along with the roadway, and repeating the steps S1 to S2. According to the invention, effective capture of a roof micro-fracture signal source in hydraulic fracturing of a coal seam is realized, and the positioning precision of a micro-seismic source is improved.
Owner:TIANDI SCI & TECH CO LTD +1
Swing scanning type laser panoramic three-dimensional scanning device based on high-precision rotary table and panoramic measurement method
The invention discloses a swing scanning type laser panoramic three-dimensional scanning device based on a high-precision rotary table and a panoramic measurement method, the swing scanning type laser panoramic three-dimensional scanning device based on the rotary table is used for realizing laser scanning, and a camera only collects line contour information of one surface area every time; the problem of plane mirror light path crosstalk formed in different ROI regions is effectively avoided. Line laser can be projected to the plane mirror at any angle, slight front-and-back pitching of the plane mirror does not affect the measurement result, the installation requirement is low, and the device has the advantages of higher spatial resolution, high precision, large scanning range, high measurement scene applicability, high measurement efficiency and wide application range. Compared with a conventional linear scanning mode, the swing scanning type laser scanning device has the advantage of higher information acquisition speed, and when a sample with a large size is reconstructed under a large working distance, the information acquisition efficiency based on the swing scanning type laser scanning mode is far higher than that of translation scanning.
Owner:ZHEJIANG UNIV
Involute sample plate measuring device with special-shaped repairable measuring head and measuring method
ActiveCN119223151Aavoid interferenceHigh measurement accuracyLapping machinesElectric/magnetic contours/curvatures measurementsMeasurement deviceMechanical engineering
The invention belongs to the technical field of precision testing, and particularly relates to an involute sample plate measuring device with a special-shaped repairable measuring head and a measuring method. Two symmetrical wedge-shaped surfaces are arranged on the special-shaped repairable measuring head; a repairable cylindrical surface knife edge is arranged at the intersection of the two wedge-shaped surfaces, and a chamfer is arranged above the cylindrical surface knife edge. According to the involute sample plate measuring device with the special-shaped repairable measuring head, the accurate measuring position of the special-shaped repairable measuring head is adjusted by adjusting the perpendicularity of a measuring bus formed by the contact of the cylindrical surface knife edge and the calibration plane of the perpendicularity calibration block and the working surface of the generating guide rail, so that the measurement of the involute sample plate is carried out. The measuring head of the measuring device is easy to install, the height of the measuring head does not need to be accurately adjusted, the measuring head is not sensitive to the installing position, the measuring head can be repaired, and the precision of measuring the tooth profile deviation of the involute template is high.
Owner:SHANTOU UNIV
Current inversion method of steel tape armored multi-core cable
ActiveCN119438677Areduce complexitylower requirementCurrent/voltage measurementWater resource assessmentMulticore cableElectrical conductor
The invention discloses a current inversion method for a steel tape armored multi-core cable, and the method comprises the steps: S1, setting a plurality of measurement points at a to-be-measured part of a to-be-measured multi-core cable, building a polar coordinate system with the geometric center of the to-be-measured multi-core cable as an original point, and constructing a position coefficient matrix, a conductor current matrix, and an attenuation coefficient matrix; s2, assigning an initial value to the unknown variable, and calculating to obtain an initial conductor current matrix and an initial attenuation coefficient matrix; s3, searching a local optimal solution of the attenuation coefficient matrix through a random optimization method; s4, constructing a linear equation set taking the conductor current matrix as an unknown variable to solve the conductor current matrix; and S5, after the sampling value of the magnetic induction intensity component is updated, solving the linear equation set, and calculating to obtain the current value of each conductor of the current cable. According to the method, on the basis of the time-invariant characteristic of the magnetization curve, the undetermined coefficient of the approximation function is solved by using the stochastic optimization algorithm, the nonlinear attenuation coefficient of the steel tape armoring of the target cable is solved, the influence of the steel tape armoring on the current inversion result is corrected, and the measurement efficiency and precision can be improved.
Owner:STATE GRID SICHUAN ELECTRIC POWER CO MARKETING SERVICE CENT
Bed load sediment transport rate measuring method based on multi-layer sediment sound signal attenuation correction of Doppler flow velocity profiler
ActiveCN119509901AImprove measurement efficiencyeasy to operateHydrodynamic testingParticle size analysisVertical projectionSoil science
The invention discloses a bed load sediment transport rate measurement method based on multi-layer sediment acoustic signal attenuation correction of a Doppler velocity profiler, which comprises the following steps: sampling sediment on the surface of a riverbed in an overtopping area of a to-be-measured river reach, and measuring sediment gradation to obtain the median particle size of the bed sediment; obtaining flow measurement data, and extracting ship speed data from the flow measurement data; calculating a riverbed movement speed according to the ship speed data; filtering the riverbed movement speed data, and calculating a characteristic value of the filtered riverbed movement speed data; respectively calculating the vertical projection area ratio of bed load according to the filtered riverbed movement speed data characteristic values; calculating a dimensionless sediment particle size according to the median particle size of the bed sand; calculating the thickness of a bed load layer according to the dimensionless sediment particle size; calculating the volume concentration of the bed load according to the vertical projection area ratio of the bed load and the thickness of the bed load layer; calculating a multi-layer sediment sound signal attenuation correction coefficient according to the bed load volume concentration; and calculating the bed load sediment transport rate according to the multi-layer sediment sound signal attenuation correction coefficient. The bed load sediment transport rate can be accurately and effectively measured.
Owner:SICHUAN UNIV
Water conservancy pipeline measuring device
ActiveCN119533247Aovercome limitationsGuaranteed accuracySpringsMechanical diameter measurementsMeasurement deviceDimension measurement
A water conservancy pipeline measuring device belongs to the technical field of pipeline measurement and comprises a pipeline and further comprises a bottom plate, a supporting unit is arranged on the bottom plate, a driving unit, a graduated scale, a measuring unit and an inner supporting unit are arranged on the supporting unit, the measuring unit is used for measuring the inner diameter, the outer diameter and the thickness of the pipeline, and the inner supporting unit is used for inner supporting positioning of the pipeline. The driving unit drives the measuring unit and the inner supporting unit to play a role at the same time. According to the invention, the same measuring device is adopted, and a single measuring step is utilized, so that the detection of three linear dimensions of the inner diameter, the outer diameter and the thickness of the pipeline can be simultaneously met, and compared with the traditional equipment which can only meet the measurement of the inner diameter of the pipeline at a single time, the comprehensive requirement on the measurement of the pipeline dimension during actual measurement can be more efficiently and comprehensively met; and the whole measurement process is carried out based on a stable and uniform reference point, so that errors caused by inconsistent reference points are fundamentally eliminated.
Owner:LIAONING BAOCHENG CONSTR ENG INSTALLATION CO LTD
All-fiber mirror image frequency sweeping interference distance measuring device and method based on wavelength division multiplexing
ActiveCN119148154Aefficient separationefficient analysisElectromagnetic wave reradiationFrequency spectrumData acquisition
The invention discloses a wavelength division multiplexing-based all-fiber mirror image frequency sweeping interference distance measuring device and method, and relates to the technical field of absolute distance measurement. The objective of the invention is to solve the technical problems in the prior art that frequency spectrum aliasing, frequency sweep nonlinearity, Doppler effect and dispersion mismatch occur in frequency sweep interference measurement, and the measurement precision, the measurement efficiency and the reliability of an all-fiber mirror image frequency sweep interference ranging system cannot be ensured. According to the technical scheme provided by the invention, the wavelength division multiplexing-based all-fiber mirror image frequency sweeping interference distance measuring device comprises a laser unit used for outputting frequency sweeping light; the measurement interferometer light path is used for generating a measurement signal according to the sweep frequency light; the auxiliary interferometer light path is used for generating an auxiliary signal according to the sweep frequency light; the gas chamber calibration light path is used for carrying out auxiliary interferometer light path calibration according to the sweep frequency light; and the data acquisition and processing module is used for obtaining a distance measurement result according to the measurement signal, the auxiliary signal and the calibration signal. The method is applied to the work of all-fiber mirror image frequency sweeping interference distance measurement.
Owner:HARBIN INST OF TECH
Digital impedance measurement method and system
InactiveCN119291308AImprove measurement efficiencyFast convergenceResistance/reactance/impedenceAc/dc measuring bridgesReference currentExcitation current
The invention discloses a digital impedance measurement method and system, and the method comprises the steps: obtaining an excitation current and a reference current after a signal source is applied to a measured impedance and a reference impedance respectively, and enabling the excitation current and the reference current to be used for generating an unbalanced current; a data acquisition control system is used for carrying out real-variable sampling ratio mixed sampling on the unbalanced current, the measured impedance voltage and the reference impedance voltage and then carrying out digital conversion on the unbalanced current, the measured impedance voltage and the reference impedance voltage; respectively acquiring vector components of the deviation voltage, the measured impedance voltage and the reference impedance voltage by using a digital orthogonal coherent detection algorithm; adjusting the balance state of the bridge circuit according to the vector component of the deviation voltage; and after balance adjustment, vector components of the measured impedance voltage and the reference impedance voltage are transmitted to an impedance calculation unit, and a plurality of parameters of impedance are obtained. By adopting the methods of high-speed synchronous data acquisition, low-jitter sampling clock, variable-sampling-ratio mixed sampling and the like, the measurement range and the measurement efficiency of the system are improved.
Owner:QILU INST OF TECH
Device compatible with critical-size small-angle X-ray scattering measurement and X-ray reflectivity measurement
PendingCN119268615AImprove compatibilityimprove accuracyUsing wave/particle radiation meansReflectivity measurementRay
The invention relates to the technical field of semiconductor critical dimension measurement, and particularly provides a device compatible with critical dimension small-angle X-ray scattering measurement and X-ray reflectivity measurement, which comprises an SAXS light source unit, an XRR light source unit, an SAXS detection unit, an XRR detection unit and a multi-degree-of-freedom sample table for bearing a sample and driving the sample to rotate, the SAXS measuring light and the XRR measuring light are perpendicular to each other in light path intersection point positions on the multi-degree-of-freedom sample table, the SAXS measuring light is transmitted and passes through a measuring point, the XRR measuring light is reflected by the measuring point, and when the multi-degree-of-freedom sample table rotates to a preset angle range, the SAXS detection unit and the XRR detection unit can synchronously perform SAXS measurement and XRR measurement on a sample, so that the SAXS measurement and the XRR measurement are synchronously performed. The consistency of data obtained by two measurement technologies in spatial positions is ensured, extra time required for transferring samples among different measurement systems is also avoided, and CD-SAXS measurement and XRR measurement of the same measurement point can be simultaneously and synchronously realized through one device.
Owner:SKYVERSE TECH CO LTD
Intelligent clip-on ammeter
PendingCN119414066Aquick measurementImprove the efficiency of installation and disassemblyCurrent/voltage measurementElectrical testingControl theoryWrench
The invention relates to the technical field of clip-on ammeters, and discloses an intelligent clip-on ammeter which comprises a clip-on ammeter body, a clip-on head is rotatably connected in the clip-on ammeter body, a wrench is fixedly connected to the left side of the clip-on head, and a fixing mechanism is arranged on the periphery of the clip-on ammeter body. The clamp-type ammeter comprises a clamp-type ammeter body, a fixing mechanism is arranged at the bottom of the clamp-type ammeter body, a handheld mechanism is arranged at the rear side of the clamp-type ammeter body, a limiting mechanism is arranged at the bottom of the fixing mechanism, and the fixing mechanism comprises a fixing assembly and a pressing assembly. When the clamp-on ammeter is used, the clamp-on ammeter body is fixed under the action of the base, the fixing frame and the concave frame, and the connecting shaft is connected with the fixing sleeve, so that the clamp-on ammeter body can be lifted under the action of the supporting rod, and the clamp-on ammeter body can measure the current of a cable at a high position.
Owner:刘雪
Control point parallel manual measurement method for image aerial triangulation
ActiveCN119413139AImprove editing efficiencyReduce the amount of data readPicture interpretationPattern recognitionComputer graphics (images)
The invention discloses a control point parallel manual measurement method for image aerial triangulation. The method comprises the following steps: firstly, performing aerial triangulation on original image data with initial positioning parameters under the condition of no ground control, and optimizing geometric positioning parameters; secondly, dividing the complete measurement area into a plurality of subareas, predicting an image where a control point is located and an image point position of the image according to coordinates of the control point and image positioning parameters, cutting a local image block by taking the position as a center, and storing the local image block into a plurality of integrated image point data files according to the subareas; then, distributing the image point data file to a plurality of operators for parallelized control point measurement; and finally, the measured control point image coordinates are exported and recovered to an original measurement area project, and parallel measurement can be completed. According to the invention, the data portability is improved, the single-point measurement efficiency is improved, and parallel measurement is supported, so that the efficiency of large-data-volume control point measurement is improved to the maximum extent.
Owner:WUHAN UNIV
A plasma thruster plume parameter multi-point measurement device and measurement method
ActiveCN114245554BImprove measurement efficiencybreak the limitationsPlasma techniqueMeasurement deviceLangmuir probe
The present invention relates to a plasma thruster plume parameter multi-point measurement device and a measurement method, the multi-point measurement device comprises: a vacuum chamber; a vacuum pump unit connected to the vacuum chamber; an industrial control unit connected to the vacuum pump unit, used to provide and maintain the vacuum environment of the vacuum chamber; and a measurement unit; the measurement unit comprises: at least two three-dimensional mobile platforms arranged in the vacuum chamber; a detection structure arranged on the three-dimensional mobile platform; a collection unit connected to the detection structure and used to collect data; the detection structure adopts a Langmuir probe, an RPA probe or a Faraday probe. The present invention can improve the plasma measurement efficiency, can continuously measure the multi-point symmetry of the plume, break the limitation of the use of the Langmuir probe, and shield the error interference in the probe circuit. At the same time, the multi-point measurement device of the present invention has a simple structure, is stable and reliable, and has strong practicality.
Owner:BEIJING DONGFANG MEASUREMENT & TEST INST
Abrasion and eccentric wear detection device for top surface of adapter
ActiveCN222579119UHigh precisionImprove measurement efficiencyMechanical depth measurementsMechanical engineeringPhysics
Owner:LIUZHOU KELU MEASURING INSTR CO LTD
Method and device for measuring pitch deviation based on line laser sensor
PendingCN121876837Aeasy to set upImprove measurement efficiencyUsing optical meansRotational axisGear wheel
The invention relates to a method and device for measuring pitch deviation based on a line laser sensor, and the method comprises the following steps: S1, calibrating the position of the line laser sensor, and obtaining the coordinate value of a coordinate system of the line laser sensor in a measurement coordinate system; s2, installing a tested gear; s3, adjusting the relative position of the line laser sensor and the measured gear; selecting a measured position in the tooth surface area of the gear teeth of the measured gear, adjusting the position of the line laser sensor, and recording the sum of the offset of the adjusted line laser sensor relative to the center of the measured gear along the x axis and the y axis in the effective measurement range of the line laser sensor at the measured position; s4, performing zero returning operation on the angle sensor of the rotating shaft of the tested gear; and S5, controlling the detected gear to rotate along the center line of the detected gear. According to the method and the device, the pitch deviation can be measured in a non-contact mode, excessive calibration and leveling are not needed before detection, and the measurement efficiency and the measurement precision are both improved.
Owner:HENAN UNIV OF SCI & TECH
Inner diameter detection equipment for hydraulic parts
ActiveCN222528515Unon-destructive measurementefficient measurementMechanical diameter measurementsUsing optical meansQuality controlMechanical engineering
The hydraulic part inner diameter detection device comprises a rack, and a working frame, the end face of which is provided with a circular hole; the bearing jig is connected to the working frame and used for bearing the workpiece, and a through hole corresponding to the round hole is also formed in the bearing jig; the positioning mechanism is used for fixing the workpiece on the bearing jig; the calibration piece, the round hole and the through hole are concentrically arranged, and the calibration piece is used for correcting the position of the inner hole measuring head; and the detection mechanism comprises a telescopic inner hole measuring head which can sequentially penetrate through the ring gauge and the circular hole, extends into the workpiece and is used for measuring the inner diameter of the workpiece. The device is compact and reasonable in structure and convenient to operate, accurate, lossless and efficient measurement of the inner diameter of a non-standard part is achieved through accurate calibration, positioning and a flexible measurement mechanism, the measurement precision and efficiency are remarkably improved, the operation difficulty and the part damage risk are reduced, and powerful support is provided for quality control in industrial production.
Owner:WUXI LANCHER TECH CO LTD
Automatic focusing type lensometer and diopter and axial position measuring method
InactiveCN119147227Aaccurate measurementImprove measurement efficiencyMaterial analysis by optical meansCharacter and pattern recognitionMachine visionImaging lens
The invention relates to the field of lens detection, in particular to an automatic focusing type lensometer and a diopter and axial position measuring method.The automatic focusing type lensometer comprises a rack and further comprises a lighting source, an axial position adjusting assembly, a focusing assembly, a lens support, an imaging assembly and an industrial personal computer which are installed on the rack, and a corneal contact lens is placed on the lens support; the axial position adjusting assembly comprises a reticle and an axial position driving mechanism for driving the reticle to rotate; the focusing assembly comprises a focusing lens group and a focusing driving mechanism for driving the focusing lens group to move; the imaging assembly comprises an imaging lens group and a camera; the industrial personal computer is used for controlling the focusing driving mechanism and the axial position driving mechanism and calculating the diopter and the axial position of the corneal contact lens. According to the invention, the automatic adjustment of the focusing amount and the axial position can be realized, the clearest position of the projection pattern is searched through a machine vision algorithm, the reading error caused by manual interpretation is avoided, and the repeated measurement precision is improved.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Multi-range capacitor capacitance value measuring circuit and method based on constant current state charging and discharging
ActiveCN119395390Areduce volumeMeet testing needsCapacitance measurementsCapacitanceElectrical resistance and conductance
The invention discloses a multi-range capacitor capacitance value measuring circuit and method based on constant current state charging and discharging, and relates to the technical field of capacitor testing. The circuit comprises a power supply module, the output end of which is electrically connected with one end of a capacitor to be tested; the input end of the resistance shunting module is electrically connected with the other end of the capacitor to be measured; the input end of the integration module is electrically connected with the output end of the resistance shunting module; the input end of the sampling module is electrically connected with the output end of the integration module; the control module is electrically connected with the power supply module, the resistance shunting module, the integration module and the sampling module; and the first input end of the adjustable window threshold comparison module is electrically connected with the output end of the integration module, and the second input end of the adjustable window threshold comparison module is electrically connected with the control module. According to the circuit provided by the embodiment of the invention, multi-range capacitance value testing can be realized.
Owner:ZHUHAI ZEN LIGHT TECH CO LTD