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52results about How to "The measurement results are objective" patented technology
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Reflection photometer of gold label immune test paper
InactiveCN1904592AAccurate Quantitative MeasurementFacilitate early diagnosisColor/spectral properties measurementsBiological testingData acquisitionTest object
The invention relates to a reflecting photometer of golden mark immunity test tape that includes scanning platform, optical system, phototranslating and signal multiplication system and data gathering and control system. The scanning platform is used to locate tested golden mark immunity test tape, and the optical system includes plural illuminating optical paths and a receiving optical path. Each illuminating optical path contains a light source and an illuminating condensing lens. The receiving optical path is made up of collimating mirror, filter, condensing lens and slit diaphragm. The phototranslating and signal multiplication system is made up of phototranslating components and pre-amplification circuit, the data gathering and control system is made up of multifunction data gathering card and computer. The invention could accurately judge the tested object and the thickness. It also has the advantages of high sensitivity, objective testing result and flexible to use.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI +1
Comprehensive determination method for coefficient of roughness of rock mass structure surface
InactiveCN104613904ARoughness coefficient value is accurateThe measurement results are objectiveUsing optical meansMultiple formsClassical mechanics
The invention relates to a comprehensive determination method for a coefficient of the roughness of a rock mass structure surface. The comprehensive determination method is suitable for the comprehensive determination on the coefficient of the roughness of the multiple forms of rock mass structure surface. Topography data of the integral rock mass structure surface can be obtained at a time through a three-dimensional laser scanner or a rock mass structure surface topography instrument and accordingly the condition that the measurement result of one line segment cannot represent the roughness of the integral rock mass structure surface previously is changed and the measurement result is objective and real. A typical curve is straightened in the space, an X coordinate and a Y coordinate of every point are changed, a Z coordinate of every point remains unchanged, the representation is performed on the roughness of the three-dimensional rock mass structure surface by a two-dimensional method, the comprehensive analysis is performed by four calculation methods, and accordingly a finally determined coefficient value of the roughness of the rock mass structure surface is accurate. The comprehensive determination method is comprehensive in consideration, simple in calculation and accurate in result.
Owner:TAIYUAN UNIV OF TECH
Comprehensive analysis system for xerophthalmia
ActiveCN106510615AAccurate measurementThe measurement results are objectiveEye diagnosticsBreakupUSB
The invention discloses a comprehensive analysis system for xerophthalmia. The comprehensive analysis system comprises an imaging system, an analyzing system and a video terminal, wherein the imaging system comprises a lighting source, an imaging assembly, a control panel and a camera shooting module, the lighting source penetrates through the imaging assembly and irradiates the eyes of a patient, and the camera shooting module carries out imaging on the eyes of the patient, and transmits the generated image to a PC machine through a USB interface; the analyzing system is arranged at the PC machine end, and comprises a communication module, an image data collecting module, a tear film breakup time check module, a lacrimal rivus height measuring module, a meibomian gland image collecting and enhancing module, a lipid layer analyzing module, a data analyzing module and an information management output module; the video terminal is connected with the analyzing system. With the comprehensive analysis system for xerophthalmia provided by the invention, the functions of tear film breakup time statistics checking, lacrimal rivus height measurement, meibomian gland image collection and enhancement, human eye lipid layer analysis, and the like are realized, a basis is provided for the clinical diagnosis for xerophthalmia, and the comprehensive analysis system is applied to the medical treatment in the relevant fields of clinical diagnosis of the ophtalmology department.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
Ceramic radome crack automatic detection method
InactiveCN102937593AAccurate measurementThe measurement results are objectiveOptically investigating flaws/contaminationCrack spreadContrast enhancement
The invention relates to a ceramic radome crack automatic detection method. The method is characterized in that the detection is carried out with a transmission image processing method. The method comprises the specific steps that: (1) a radome transmission image is obtained; (2) the image is subjected to gray scale and contrast enhancement processing, such that a crack area is underlined; (3) a binarization treatment is carried out; (4) a median filtering noise removing treatment is carried out; (5) a crack framework abstraction treatment is carried out; and (6) a crack length statistic treatment is carried out. With the treatment process, ceramic radome tiny cracks can be detected. According to the invention, with the radome crack transmission image processing method, radome crack automatic detection is realized.
Owner:SHANDONG UNIV OF TECH
Device for detecting wheel hub and automobile component product
PendingCN110375653ARealize non-contact online detectionThe measurement results are objectiveUsing optical meansControl systemData acquisition
An embodiment of the invention discloses a device for detecting a wheel hub and an automobile component product. The device comprises a frame body, a lifting and lowering detecting device, a first workpiece conveying mechanism, a second workpiece conveying mechanism and a workpiece clamping and moving mechanism. The lifting and lowering detecting device comprises a bracket, a lens fixing plate, alifting and lowering device, a backlight source, a detecting platform, a lens and a camera. The lens is disposed on the lens fixing plate, the camera is disposed under the lens, the detecting platformis disposed above the lens, and the detecting platform is provided with a window penetrating the thickness direction of the detecting platform, a lower surface of the detecting platform is provided with a front light source, and the lifting and lowering device is respectively connected to the lens fixing plate and the detecting platform. Through the cooperation of the camera, the lens and the combined light source, the non-contact online detection is achieved, the automatic data acquisition, processing and automatic identification are completed by a vision system and a control system in the whole process, human subjective factors are reduced, the manual processing is not needed, the detection efficiency and detection accuracy are improved, and the labor cost is reduced.
Owner:长沙精锐智能科技有限公司
Ship motion state digital image measuring method in bridge collision test
InactiveCN103954220AHigh measurement accuracyThe measurement results are objectiveUsing optical meansRectangular coordinatesContact mode
The invention relates to a ship motion state digital image measuring method in a bridge collision test. According to the method, at first, an integral space rectangular coordinate system, a camera rectangular coordinate system and a rectangular coordinate system on a camera shooting plane are respectively set up, secondly, relation among the rectangular coordinate systems is set up, and A, B, C and D point coordinates of the shooting range ABCD and the coordinate of any point P of a camera on the plane are calculated; thirdly, feature points are selected from the area ABCD, pixel positions of all the feature points in an image are identified in the image, and linear systems of equations are set up and solved to obtain the mapping relation between the image and real space; finally, displacement of a ship body in the plane can be determined according to the mapping relation by identifying the feature points on the ship body. As a non-contact mode is adopted, the method is high in measurement precision, and the effect is more remarkable for large-scale test measurement in particular.
Owner:FUJIAN JIANGXIA UNIV
Crack multiple-parameter observation device based on close-range photogrammetry
InactiveCN104931021AIncrease flexibilityReduced observation requirementsAngle measurementPhotogrammetry/videogrammetryImaging processingObservation data
The invention discloses a crack multiple-parameter observation device based on close-range photogrammetry. The crack multiple-parameter observation device comprises an image collection module used for acquiring conditions of cracks to generate crack images; a position determining module used for determining positions of the cracks and marking the positions on the crack images to generate marked images; an image processing module used for analyzing the crack images to generate crack parameters and marking the crack parameters on the marked images to generate result images, and a memory module used for storing the crack images and the result images. The crack multiple-parameter observation device enables crack observation data to be more accurate, higher in reliability and convenient to operate so as to effectively improve the crack observation efficiency.
Owner:重庆华地资环科技有限公司 +1
Planetary gear spherical surface measuring device
ActiveCN102288088ASimple detection structureEasy to manufactureMechanical measuring arrangementsGear wheelEngineering
The invention discloses a planetary gear spherical surface measuring device which comprises dial indicators, dial indicator frames, a screw and a tooth mould seat. A conical tooth ring is arranged in the upper part of the tooth mould seat, and a positioning component of a circular hole is arranged at the lower part the tooth mould seat. The dial indicator frames are umbrella-shaped frame components, spherical trisection fork strips are arranged on the top, and vertical shafts are connected to the lower parts of the dial indicator frames. The bottom section of the vertical shaft is in clearance fit with the circular hole of the bottom face of the tooth mould seat and the middle section of the vertical shaft is in clearance fit with the inner hole of a planetary gear to be tested. The spherical surfaces on the top of the dial indicator frames are concentric with the spherical surface of the planetary gear to be tested which is positioned and arranged on the tooth mould seat; the three fork strips are respectively provided with one dial indicator which is installed into a through hole in a way that the dial indicator head faces downwards; through holes on the three fork strips are respectively arranged on an outer point, a middle point and an inner point of the spherical surface of the planetary gear to be tested; according to the invention, the standard planetary gear is arranged in the tooth mould seat, the three dial indicators are zeroed, then the planetary gear to be test is installed for comparative measurement, and the installation position of a cutter or a clamp is guided to be adjusted according to a real measurement result. The planetary gear spherical surface measuring device is not restricted by particular detection conditions, and is particularly applicable to the on-line detection of a production site.
Owner:JIANGSU AIRSHIP GEAR
Dry eye disease full-automatic detecting apparatus
ActiveCN106510616AAccurate measurementThe measurement results are objectiveEye diagnosticsDiseaseScreen printing
The invention discloses a dry eye disease full-automatic detecting apparatus, which comprises a probe assembly, a handle, a portable device and an analysis device, wherein the probe assembly comprises an imaging assembly, a lighting source, a camera module, a camera fixing device, a control board and a cover plate; the imaging assembly comprises an optical filter, a fixed sleeve and a conical drum; the conical drum is of an annular structure chequered with black and white; black rings are formed by conducting silk-screen printing with oil ink, and the oil ink is transmissive in infrared light and is non-transmissive in white light; one end of the handle is connected to the lower end of the probe assembly; the portable device comprises a base, a head supporting assembly, an adjusting handle rod and an adjustable workbench assembly; and the analysis device comprises an image data acquisition unit, a data detection unit and a data analysis unit. According to the detecting apparatus provided by the invention, the black annular structures on the conical drum is invisible to some infrared light while is visible to the white light, so that the demands of four imaging modes are satisfied; and it is unnecessary to detach the Placido conical drum when the detecting apparatus is used, so that a using process is simplified and the conical drum is prevented from getting lost easily.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
Falling type corn ear holographic character rapid measuring system and method
InactiveCN104865259AFast measurementAccurate measurementMaterial analysis by optical meansParallaxSpatial distribution
The invention provides a falling type corn ear holographic character rapid measuring system and method. The falling type corn ear holographic character rapid measuring system comprises a conveyer which is used for enabling single-ear corn ears to sequentially fall off in vertical states, an image collection device which is connected with the conveyer which is used for collecting omni-bearing images of the fallen single-ear corn ears, a processing device which is connected with the image collection device and used for controlling the image collecting device to collect the omni-bearing images, obtaining the single-ear corn ears omni-bearing images collected by the image collecting device, splicing the omni-bearing images, performing three-dimension space coordinates according to parallax of the omni-bearing images, restoring space distribution information of the single-ear corn ears and accordingly calculating ear character parameters of the obtained single-ear corn ears. The falling type corn ear holographic character rapid measuring system can achieve measurement of core ear characters and ear character parameters without damage and is rapid in measurement speed, accurate in measurement result, low in costs and high in efficiency.
Owner:CHINA AGRI UNIV
System for measuring mass of heavy object lifted by motor by utilizing motor output power and method thereof
ActiveCN102589662ARelatively small errorLess susceptible to external factorsWeighing apparatusElectric machineryEngineering
The invention discloses a method for measuring mass of a heavy object lifted by a motor by utilizing motor output power. The method comprises the following steps: acquiring data of a heavy object with unknown mass in a lifting process, screening out data of a continuous effective data smooth segment of the motor in stable working with a speed close to a rated rotating speed, calculating total output power of the motor at a continuous position segment, and calculating the mass of the heavy object according to a functional relation obtained in advance between the mass of the heavy object and the total output power of the segment. According to the method and a system provided by the invention, a large error problem in a traditional measuring method can be solved, measurement is not easy to be influenced by an external factor, and a measurement result is comparatively objective.
Owner:SHENZHEN CELIJIA CONTROL TECH
Method and system for determining rain intensity of corona cage raining device under breeze condition
ActiveCN111693825AImprove environmental friendlinessImprove economyTesting dielectric strengthRainfall/precipitation gaugesEngineeringAtmospheric sciences
The invention provides a method and a system for determining the rain intensity of a corona cage raining device under a breeze condition. According to the method and the system, the method comprises:under the condition that wind exists, calculating the horizontal displacement of the raindrops under the action of horizontal wind; determining the positions of the water drops in the spray holes in the horizontal plane of the wire, determining the number of the spray holes for dropping the rain drops in the units with the same area divided by the horizontal line of the wire, and comparing the number with the number of the spray holes for dropping the rain drops in each unit in the absence of wind to determine the rain intensity of each unit in the horizontal line of the wire. According to themethod and the system, the inaccurate measurement result caused by monitoring the rain intensity only through 1-2 rain gauges under the corona cage in the prior art is well corrected. Therefore, themeasurement result is more objective and closer to the actual situation, more accurate reference data is provided for selecting a proper wire section and a configuration mode, and the environmental friendliness of power transmission and transformation engineering and the economical efficiency of engineering cost are facilitated.
Owner:CHINA ELECTRIC POWER RES INST +2
Planetary gear spherical surface measuring device
ActiveCN102288088BSimple detection structureEasy to manufactureMechanical measuring arrangementsEngineeringConical teeth
Owner:JIANGSU AIRSHIP GEAR
Static maturity measuring method for architecture
InactiveCN105739993AReduce maintenance costsThe measurement results are objectiveSoftware metricsSpecific program execution arrangementsSoftware EvaluationComputer module
Owner:SOUTHEAST UNIV +1
Measurement and representation method for softness of tobacco leaves
ActiveCN105158042ASolve the problem that softness cannot be quantitatively characterizedThe measurement results are objectivePreparing sample for investigationWater contentWater balance
The invention discloses a measurement and representation method for softness of tobacco leaves. Water balance is performed on the tobacco leaves to be measured for the first time, the normal water content of the tobacco leaves is restored, and cut small pieces can be prevented from being broken and are kept complete. A cutter with a square cutting edge is adopted for cutting in a leaf-pressing mode so that the uniform size specification of the cut small pieces can be guaranteed, wherein the specification of the square cutting edge is 20 mm*20 mm. Through cutting 6-10 small pieces at symmetrical inter-vein positions on the two sides of each main vein, the average value is measured and calculated, the result can be more approximate to the real value of each whole tobacco leaf, and through removing the small pieces with obvious leaf veins on the surfaces, influences on the measurement result by the leaf veins can be removed. Through flattening, the cut small pieces are unfolded, and interference on the measurement result by curling, twisting and shrinking of the leaves can be avoided. Through secondary water balance, the small pieces reach the same regulated water condition before measurement, and through specifying a slit with the width of 5 mm and measuring softness, in the front transverse direction and longitudinal direction, of all the cut small pieces of the leaves, it is guaranteed that the measurement condition and the measurement mode are uniform. The result calculation method and expression mode achieve quantified expression of qualitative indexes.
Owner:CHINA TOBACCO HUNAN INDAL CORP
Chlorine dioxide content determination method
InactiveCN101556264AThe measurement results are objectiveGuaranteed to joinAnalysis using chemical indicatorsChemical analysis using titrationChemistryDisinfectant
The invention relates to a chlorine dioxide content determination method which adopts the previous four steps in a five-step iodometry method. The method is characterized in that the phosphate buffer solution is added in the step 1 and the step 3 until the pH value of the test solution is 7; 15-20 ml of potassium iodide solution is added in; and 2.5mol / L hydrochloric acid solution is added in the step 2 and the step 4 until the pH value is 2. The invention ensures that the added phosphate buffer solution meet the requirement of neutral pH and also ensures the potassium iodide solution sufficient so as to obtain sufficient reaction, and the pH value of the obtained solution is adjusted to 2 after the values A and C are measured; and except for the influence of the pH value of the solution to all the components thereof, the invention can determine the content of ClO2 in the chlorine dioxide disinfectant, is objective and accurate in measuring result and can reflect the contents of all the components in the chlorine dioxide disinfectant.
Owner:SHINVA MEDICAL INSTR CO LTD
Paraffin smell level identification device and method
InactiveCN108181480AThe measurement results are objectiveObjective operationMaterial resistanceSensor arrayGas detector
The invention discloses a paraffin smell level identification device, which comprises a paraffin smell information dynamic collecting device and au upper computer, and the paraffin smell information dynamic collecting device comprises a dynamic headspace sample feeding device and a smell collecting device test box body, and the dynamic headspace sample feeding device comprises a headspace diffusion device, and a gas intake pipe installed at the upper end of the headspace diffusion device; one side of the smell collecting device test box body is connected with the headspace diffusion device through an air pump; and the other side of the smell collecting device test box body is connected with an exhaust pipe through an exhaust pump. The smell collecting device test box body is provided witha sensor array. The sensor array is composed of 8 metal oxide gas sensitive sensors. The gas sensitive sensors send collected analog signals to a data acquisition card through a conditioning module, the data acquisition card transmits data to a PC by a serial port, and paraffin sample smell level grading can be completed by multiple modes of recognition combined platforms. The paraffin smell levelidentification device has the advantages of scientific and reasonable method, short process, convenient operation, fast recognition rate, high accuracy, and the like.
Owner:NORTHEAST DIANLI UNIVERSITY
Automatic measuring system for heat resistance of thermoplastic material
InactiveCN102169070AEasy to callEasy to manageInvestigating material hardnessHeat resistanceEngineering
The invention discloses an automatic measuring system for the heat resistance of a thermoplastic material, relates to a thermoplastic material and provides an automatic measuring system for the heat resistance of a thermoplastic material, which has high measuring accuracy and high automatic degree. The automatic measuring system is provided with a light source, an optical information conversion device, a CCD (Charge Coupled Device) camera, an image acquisition card, a sample platform, input equipment, a computer and output equipment, wherein light rays emitted by the light source are directly radiated on an impression sample arranged on the sample platform; reflected light rays of the impression sample are focused on the CCD camera through the optical information conversion device; the digital signal output end of the CCD camera is connected with the image acquisition card; the image acquisition card is connected with the computer; and the input equipment and the output equipment are connected with input and output ports of the computer respectively. The automatic measuring system has the advantages of accuracy as high as + / - 10 mum, objective measuring result, high automatic degree and time and labor saving.
Owner:中华人民共和国厦门出入境检验检疫局
Piston type or buoy type pressure meter effective area measuring method
InactiveCN101476962BThe measurement results are objectiveFluid pressure measurementDifferential pressureEngineering
Owner:SHANDONG MEASUREMENT SCI RES INST
Device for measuring back vertex power of lens
ActiveCN103512730ASmall footprintRealize integrationTesting optical propertiesMeasurement deviceLinear relationship
The invention provides a device for measuring back vertex power of a lens. The device comprises a light source, a target reticle, a collimator objective and a telescope. An afocal target is generated by means of the collimator objective through the target reticle illuminated by the light source, the to-be-tested lens is arranged between the collimator objective and the telescope, an image space reticle is adjusted so that a clear image of the target reticle is obtained in the telescope, and the back vertex power phi is obtained in a calculating mode through a formula. According to the method, what is measured is the back vertex power in principle, approximation does not exist, the target is arranged to be afocal in the method that the collimator objective is additionally arranged, an instrument measurement device is shortened, integration can be achieved, and accordingly an instrument occupies little space, daily maintenance, detection and calibration are facilitated. Due to the fact that the focal length of the telescope is long enough, the measurement accuracy is greatly improved. The vertex power and the moving distance of the image space reticle are in a linear relationship, and accordingly the moving distance is shorter when the same measurement accuracy of the measurement device needs to be reached. The length measurement can be achieved through a mechanical rule, and cost of the instrument is reduced.
Owner:NAT INST OF METROLOGY CHINA
Device and method for testing time domain pulse shielding effectiveness of small shielding body
InactiveCN112578192AThe measurement results are objectiveEasy to operateElectromagentic field characteristicsTime domainEngineering
The invention discloses a device and a method for testing time domain pulse shielding effectiveness of a small shielding body. The device for testing time domain pulse shielding effectiveness of the small shielding body comprises a pulse transmitting system, an antenna system, a shielding body to be tested and a receiving system. Through the specific structural arrangement, pulse signals instead of continuous wave signals are used as measurement signals, frequency information is obtained through time domain-frequency domain conversion, full-band measurement can be completed through one-time measurement, the principle is closer to the actual use condition, the measurement result is more objective and real, such that the time domain pulse shielding effectiveness test operation steps of: thesmall shielding body are simpler and more convenient, and the measurement efficiency is more precise.
Owner:BEIJING INST OF RADIO METROLOGY & MEASUREMENT
Method for determining acid dew point of boiler flue gas engineering
ActiveCN103364438AOvercome the flaws that affectDifficulty of SimplificationMaterial heat developmentData displayData acquisition
The invention discloses a method for determining the acid dew point of boiler flue gas engineering. The method comprises the following steps of: (1) extending a heat exchange section of a heat exchanger, a detection section of an air speed detector and a sensor part of a flue gas analyzer into a flue; (2) closing a water outlet valve, opening a water supplementing port valve, setting the preset temperature T0 of a temperature control water tank to be above 70 DEG C, and opening the water outlet valve and starting a water pump when the water temperature data displayed on a data acquisition instrument reaches T0; (3) recording the flue gas temperature Tgas, inlet water temperature Tin, outlet water temperature Tout, wall temperature Tw of heat exchanger, volume flow qv and glue gas air speed value vg; (4) calculating the Noshir Nu under different flow Renault numbers Ref when the wall temperature of the heat exchange is Tw; (5) gradually reducing the preset temperature T0, and repeating the steps (3) and (4) to obtain the Noshir Nu under different Renault numbers Ref at different wall temperatures Tw of the heat exchange; and (6) observing the Noshir number under different wall temperatures to determine the temperature before Noshir number mutation to be the acid dew point of the engineering.
Owner:SHANDONG UNIV
Intelligent multi-curved surface detecting system and method of railway vehicle
InactiveCN110440701ARealize high-precision detectionImprove stabilityUsing optical meansBody compartmentPersonal computer
The invention discloses an intelligent multi-curved surface detecting system and method of a railway vehicle. The system comprises: a measuring module for detecting a height value of a point to be measured on a bottom surface of a carriage; a wireless receiving module for transmitting received data to an industrial personal computer; and the industrial personal computer for remotely controlling and measuring the measuring module. The intelligent multi-curved surface detecting system disclosed by the invention achieves high-precision detection of planeness of the bottom surface of the carriagein a manufacturing process of the railway vehicle, and the stability of a reference plane is improved; and by means of a PSD detection with precision higher than 1mm, the accuracy of measurement datais improved.
Owner:NANJING ZHONGCHE PUZHEN URBAN RAIL VEHICLE CO LTD
Visibility measuring method based on atmospheric fine particle spectrometer
InactiveCN102183442BAccurate measurementReliable measurementParticle size analysisExtinctionAtmospheric sciences
The invention discloses a visibility measuring method based on an atmospheric fine particle spectrometer. The method comprises the following steps of: directly analyzing the atmospheric visibility from the angle of fine particle spectrum distribution in the atmosphere; and obtaining the atmosphere visibility according to the particle size distribution and the particle population concentration measured by the atmospheric fine particle spectrometer by analyzing the total extinction contribution of different sizes of particles to visible light. The method is simple, can realize atmospheric fine particle size distribution, particle population concentration distribution and the atmospheric visibility as well as contribution rate and distributed measurement of different sizes of particles to the atmospheric visibility by means of only the atmospheric fine particle spectrometer, has objective, accurate and reliable measurement results, ensures that the measurement process is not influenced by weather conditions (rain, fog, haze, sand and dust, and the like) and no target and background reference substances are required as references, and is easy to operate because instruments are installed and maintained indoors.
Owner:ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Reflection photometer of gold label immune test paper
InactiveCN100526883CAccurate Quantitative MeasurementFacilitate early diagnosisScattering properties measurementsColor/spectral properties measurementsData acquisitionTest object
The invention relates to a reflecting photometer of golden mark immunity test tape that includes scanning platform, optical system, phototranslating and signal multiplication system and data gathering and control system. The scanning platform is used to locate tested golden mark immunity test tape, and the optical system includes plural illuminating optical paths and a receiving optical path. Each illuminating optical path contains a light source and an illuminating condensing lens. The receiving optical path is made up of collimating mirror, filter, condensing lens and slit diaphragm. The phototranslating and signal multiplication system is made up of phototranslating components and pre-amplification circuit, the data gathering and control system is made up of multifunction data gathering card and computer. The invention could accurately judge the tested object and the thickness. It also has the advantages of high sensitivity, objective testing result and flexible to use.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI +1
Obtaining Method of Liquid Transverse Jet Boundary
ActiveCN105547185BThe measurement results are objectiveQuantification is clear and accurateUsing optical meansLiquid jetEngineering
The invention provides a method for obtaining the lateral jet boundary of liquid. Through comparing relative errors among a plurality of linear fitting curves, the method obtains a clear lateral jet boundary of liquid.
Owner:NAT UNIV OF DEFENSE TECH
Photoelectric theodolite servo system performance test device and test method
InactiveCN103344258BAccurate assessment of traceabilityReal target tracking effect imageMeasurement devicesTest performanceTheodolite
The invention relates to a device for testing performance of a servo system of an electro-optic theodolite. The device comprises a simulated target generator and a servo system control display, wherein the simulated target generator is used for generating a target movement sequence pictures and determining the target position corresponding to each picture; and the servo system control display is used for enabling the servo system of the electro-optic theodolite to control the electro-optic theodolite to rotate according to the miss distance of the simulated target, recording the rotating angle position of the electro-optic theodolite, and displaying the simulated target movement image of each target image under the rotation of the electro-optic theodolite. According to the device and the method for testing performance of a servo system of an electro-optic theodolite, the tracking performance of the servo system capable of controlling the electro-optic theodolite can be accurately evaluated, the target tracking performance of the servo system can be intuitively displayed by the device based on the movement state of a target in the image, and a real target tracking effect image of the servo system can be simulated.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Device for determining boiler flue gas engineering acid dew point
ActiveCN103383365BOvercome the flaws that affectDifficulty of SimplificationMaterial heat developmentTemperature controlFlue gas
Owner:SHANDONG UNIV
A Comprehensive Determination Method of Roughness Coefficient of Rock Mass Structural Surface
InactiveCN104613904BRoughness coefficient value is accurateThe measurement results are objectiveUsing optical meansMultiple formsZ-Coordinate
The invention relates to a comprehensive determination method for a coefficient of the roughness of a rock mass structure surface. The comprehensive determination method is suitable for the comprehensive determination on the coefficient of the roughness of the multiple forms of rock mass structure surface. Topography data of the integral rock mass structure surface can be obtained at a time through a three-dimensional laser scanner or a rock mass structure surface topography instrument and accordingly the condition that the measurement result of one line segment cannot represent the roughness of the integral rock mass structure surface previously is changed and the measurement result is objective and real. A typical curve is straightened in the space, an X coordinate and a Y coordinate of every point are changed, a Z coordinate of every point remains unchanged, the representation is performed on the roughness of the three-dimensional rock mass structure surface by a two-dimensional method, the comprehensive analysis is performed by four calculation methods, and accordingly a finally determined coefficient value of the roughness of the rock mass structure surface is accurate. The comprehensive determination method is comprehensive in consideration, simple in calculation and accurate in result.
Owner:TAIYUAN UNIV OF TECH
Digital Image Measuring Method of Hull Motion State in Bridge Crash Test
InactiveCN103954220BHigh measurement accuracyThe measurement results are objectiveUsing optical meansRectangular coordinatesContact mode
The invention relates to a ship motion state digital image measuring method in a bridge collision test. According to the method, at first, an integral space rectangular coordinate system, a camera rectangular coordinate system and a rectangular coordinate system on a camera shooting plane are respectively set up, secondly, relation among the rectangular coordinate systems is set up, and A, B, C and D point coordinates of the shooting range ABCD and the coordinate of any point P of a camera on the plane are calculated; thirdly, feature points are selected from the area ABCD, pixel positions of all the feature points in an image are identified in the image, and linear systems of equations are set up and solved to obtain the mapping relation between the image and real space; finally, displacement of a ship body in the plane can be determined according to the mapping relation by identifying the feature points on the ship body. As a non-contact mode is adopted, the method is high in measurement precision, and the effect is more remarkable for large-scale test measurement in particular.
Owner:FUJIAN JIANGXIA UNIV
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