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40results about How to "Rich measurement information" patented technology
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Test unit for monitoring oil-paper insulation state
The invention provides a test unit for monitoring an oil-paper insulation state, and is suitable for the fields of transformers and oil-paper insulation monitoring. The test unit comprises a computer, an electrometer and a control bus communication cable; a high voltage DC power source and an ammeter are arranged in the electrometer; one end of the control bus communication cable is connected with a control bus interface of the electrometer, while the other end is connected with an interface of a control bus control card in the computer; a low voltage end interface of the high voltage DC power source and a grounding interface of the electrometer are grounded together; a high voltage end of the high voltage DC power source is connected with a first electrode of a product to be tested through a high voltage wire; a measuring end of the ammeter is connected with a second electrode of the product to be tested; and the test unit is provided with a control panel capable of displaying and storing data and setting parameters. The test unit is simple to operate, has the current detecting rate at least 1sps, can generate rich measurement information, is convenient to analyze and process test results, and has lower cost than foreign test instruments.
Owner:XI AN JIAOTONG UNIV +1
Testing arrangement of oil paper insulation frequency domain spectrum
ActiveCN102426325AEasy to operateRich measurement informationTesting dielectric strengthFrequency domainVoltage divider
The invention discloses a testing arrangement of an oil paper insulation frequency domain spectrum. An analog output plate and a data acquisition card are inserted in a PCI slot of a computer, and are respectively connected with an analog output card binding post plate and a data acquisition card binding post plate through connection cables. An input terminal and an output terminal of a voltage amplifier are connected with the analog output plate binding post plate and a high voltage terminal of a specimen respectively. Two ends of a resistance voltage divider are connected with the specimen high voltage terminal and the data acquisition card binding post plate respectively. A current input terminal, a voltage output terminal and a control terminal of a current amplifier are connected with a specimen grounding terminal, the data acquisition card binding post plate and the data acquisition card respectively. Grounding terminals of the voltage amplifier, a voltage divider and the current amplifier are connected with a same ground wire. The invention has the advantages of simple operation, accurate measurement, a large amount of obtained information, low cost, no damage of measurement oil paper insulation equipment and a material frequency domain spectrum.
Owner:XI AN JIAOTONG UNIV
Double-LaBr3 detector element energy spectrum logger based on controllable neutron source and logging method
InactiveCN103696765ARich measurement informationReduce uncertaintyBorehole/well accessoriesNuclear radiation detectionPorosityPhotomultiplier
The invention discloses a double-LaBr3 crystal detector element energy spectrum logger based on a controllable neutron source. The double-LaBr3 crystal detector element energy spectrum logger comprises a cylindrical shell, wherein the cylindrical shell is internally provided with a LaBr3 detector I and a LaBr3 detector II from top to bottom, the controllable neutron source is connected with a photomultiplier at the top part of the LaBr3 detector I, a chromium foil is arranged between the LaBr3 detector I and the LaBr3 detector II, and the photomultiplier, the LaBr3 detector I, the chromium foil and the LaBr3 detector II are arranged in a boron sleeve body which is positioned in the cylindrical shell; a tungsten shielding body is arranged between the controllable neutron source and the boron sleeve body, and the controllable neutron source is connected with a neutron detector through a neutron acceleration part. According to the double-LaBr3 crystal detector element energy spectrum logger based on the controllable neutron source, disclosed by the invention, by utilizing the controllable neutron source and the double LaBr3 detectors with high resolution, the content measuring accuracy of elements such as C and Mg and the longitudinal resolution can be increased, the measurement information can be increased, and the purpose of simultaneously determining parameters of stratum element content, mineral content, porosity degree and the like can be realized; the double-LaBr3 crystal detector element energy spectrum logger has the characteristics that the environmental hazard is reduced, effective stratum information is enriched, and the like.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Shake monitoring system based on Brillouin distributed optical fiber sensing
InactiveCN103438982AShake state monitoringOnline temperature monitoringSubsonic/sonic/ultrasonic wave measurementThermometers using physical/chemical changesFiberData acquisition
The invention discloses a shake monitoring system based on Brillouin distributed optical fiber sensing and belongs to the technical field of overhead cable safety monitoring. The system comprises a temperature and strain monitoring device based on a Brillouin light time domain analysis, and a plurality of shake sensors, wherein the temperature and strain monitoring device is composed of a semiconductor laser, an optical coupler, an electric light modulator, an acousto-optic modulator, a microwave frequency sweep device, a photoelectric detector, a data collection card and the like; the shake sensors are composed of rotation rods and counterweight blocks; the shake sensors are installed on the fault-prone points of a cable; and when the cable is shaken, the rotation rods connected with one end of a fiber drive the counterweight blocks to swing around the fiber, under the centrifugal effects, the rotation rods drive the surrounded fiber to generate a bending strain, a shaking state can be converted into the bending strain of the fiber and thus be detected by the Brillouin temperature and strain monitoring device. The shake monitoring system based on Brillouin distributed optical fiber sensing is suitable for on-line monitoring of the shaking state and the temperature of an overhead cable, the long-distance and distributed measuring is realized, the practicality and feasibility are high, the laying is flexible, and the cable safety monitoring is effectively realized.
Owner:SHANDONG UNIV
Lung respiration monitoring system based on magnetic detection electrical impedance imaging
InactiveCN104783800AImprove morbidityEasy to limitRespiratory organ evaluationSensorsIll conditioningChest cavity
The invention discloses a lung respiration monitoring system based on magnetic detection electrical impedance imaging. By means of an excitation source module, excitation signals are introduced to the chest cavity of an imaging body through a plurality of pairs of excitation electrodes bonded to the measured imaging body; a measurement module is composed of a series of measurement coils and used for measuring the magnetic induction intensity of an induced magnetic field caused by exciting current around the chest cavity; a control module is used for controlling the signal excitation and magnetic field measurement process during the whole respiration monitoring; an image reconstructing module obtains the image change of electrical inductance distribution of the chest cavity in the respiration process according to an electrical impedance image reconstruction algorithm on the basis of magnetic field distribution data. According to the system, the measurement coils of any number can be placed in the space around the chest cavity of the imaging body, limitation of a traditional electrical impedance imaging system on measurement information is changed, the system has the advantages of being high in measurement precision, high in speed and reliability and free of injuries to a human body, more importantly, information amount is increased by means of a magnetic field measurement mode, and therefore the electrical impedance reconstructing ill conditioning is changed, the resolution ratio of electrical impedance (or impedance spectrum) images is increased, and the image reconstruction quality is improved.
Owner:TIANJIN POLYTECHNIC UNIV
Hyperspectral microscopic polarization imaging device and method
InactiveCN108414088AEasy to buildOptimize data processingPolarisation spectroscopyMicroscopesPolarizerOptical polarization
The present invention discloses a hyperspectral microscopic polarization imaging device and method. The device comprises: a microscopic imaging device configured to perform amplification imaging observation of a sample and obtain images of the sample in different measurement conditions; a spectral filtering device configured to perform screening of optical wavelengths of an incident optical path and performing continuous single-band selection; a polarization modulation device configured to perform modulation of optical waves with sample polarization information; and an image processing unit configured to performing processing and calculation of light intensity images to obtain the single-band polarization parameter image of the sample. The method comprises the steps of: filtering a light source through a spectral filtering device, and allowing the light to be incident onto a sample; controlling a polarizing film to perform rotation for three times, and performing sampling of images; processing the collected images by the image processing unit, and obtaining a polarization data cube of the sample under a single wavelength; and screening out the next center wavelength by the spectralfiltering device, repeatedly performing rotation and image sampling of the polarizing film until sampling of each waveband is completed, and obtaining a sample polarization spectroscopic data set. The optical path is simple, the cost is low, and the measurement information is comprehensive.
Owner:NANJING UNIV OF SCI & TECH
High-resolution orientation resistivity side direction logging instrument and logging method
The invention relates to an orientation side direction logging instrument and a logging method. A high-resolution orientation resistivity side direction logging instrument mainly comprises an orientation electrode system and a measurement electronic circuit, wherein the electrode system consists of a plurality of side direction electrode rings which have different widths and are embedded on an insulation carrier and an orientation electrode ring M0; the M0 is arranged in the center of the electrode system; 14 electrode rings with different widths and the M0 are in axial symmetry and arranged at different intervals; each homonymic electrode ring is in short circuit through a wire and kept at the same potential; and the homonymic electrode rings, the orientation electrode ring, a reference electrode N and a loop B are connected with the measurement circuit through wires. By the high-resolution orientation resistivity side direction logging instrument and the logging method, a high-resolution side direction curve and an orientation side direction curve can be measured at the same time, and relatively detail logging information can be supplied to logging evolution; the high-resolution logging instrument can identify a thin layer and a thin mutual layer of which the thickness is 0.2 meter, so that an effective logging curve is supplied to thin layer logging; and cracks and caves can be effectively identified.
Owner:THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
Ruler
ActiveUS20160047642A1Rich measurement informationMeasuring tapesIdentification meansComputer science
Owner:BOE TECH GRP CO LTD
Fault detection and reconstruction system and method based on dynamic-static hybrid strategy
ActiveCN107153414ARich measurement informationImprove real-time performanceProgramme controlElectric testing/monitoringModel selectionControl system
The invention relates to a fault detection and reconstruction system and method based on a dynamic-static hybrid strategy. Firstly, according to the current work mode of a control system, the fault detector and sensor configuration schemes are subjected to combined optimization; on the premise of ensuring the fault detection performance, the system energy consumption is possibly reduced; then, when the fault is detected, the real-time accurate recognition on the fault type is realized through solving the multi-model selection problem; finally, according to the recognized fault type, through the design of the reasonable switching control scheme, the control allocation and the system sterilization can be completed; the autonomous fault detection and reconstitution of the control system under various possible fault conditions can be realized. By using the technical scheme, the static fault monitoring and the dynamic fault type recognition and control system reconstruction are combined. Compared with a conventional fault detection and fault-tolerant control scheme, various kinds of potential faults can be effectively treated; the real-time performance is improved; the energy consumption is reduced; the system and the method can be applied to the high-reliability control problem of control objects of astrovehicles, mechano-electronics, chemical engineering and the like.
Owner:BEIHANG UNIV
Paddy field plow pan information continuous sensing device and method
PendingCN111077284ASimple structureSimple and fast operationForce measurementEarth material testingAgricultural engineeringData acquisition
The invention relates to a paddy field plow pan information continuous sensing device which comprises an attitude sensor, two sets of feeler lever sensing devices and a data acquisition device. The attitude sensor is installed on a tractor body, and the two sets of feeler lever sensing devices are installed on left and right front wheel main pins of a tractor respectively; the feeler lever sensingdevice comprises a supporting frame, a parallelogram mechanism, a force sensor, an angular displacement sensor, a feeler lever and a constant-pressure mechanism; the supporting frame is relatively fixed to the main pins, the feeler lever, the constant-pressure mechanism and the force sensor ascend and descend relative to the supporting frame through the parallelogram mechanism, and the angular displacement sensor is installed on the parallelogram mechanism. The invention further relates to a paddy field plow pan information continuous sensing method. Plow pan depth information and plow pan depth soil resistance on a running path of the paddy field tractor can be continuously sensed at the same time, measurement means of a paddy field terrain and a soil bearing capacity are enriched, and the device and the method belong to the technical field of soil information sensing.
Owner:SOUTH CHINA AGRI UNIV
Hyperspectral microscopy imaging and polarization modulation apparatus based on LCTF and method thereof
InactiveCN107101949AEasy to buildOptimize data processingPolarisation-affecting propertiesMicroscopic imageData set
The invention provides a hyperspectral microscopy imaging and polarization modulation apparatus based on LCTF and a method thereof. The hyperspectral microscopy imaging and polarization modulation apparatus is an integration system by combing a microscopy imaging technology and a hyperspectral imaging and polarization modulation technology. The apparatus comprises a microscopic imaging module, a spectrum splitting module, a polarization modulation module, and an image processing module. The method is characterized in that broadband light source is subjected to light splitting by LCTF, light with different center wavelengths can be output, the specific angle rotation is carried out on a polarizing film, the polarization modulation is carried out on the light from a sample, the image is taken once when a camera is rotated for one time, three-time rotation is taken as a single wave band period, the collected light intensity graph with different polarization information is input into a computer for being processed, and a polarization data cube of the sample under single wavelength is obtained, then a next center wavelength is output by LCTF, the rotation of the polarizing film is repeated, the image taking by the camera is repeated until sampling at each wave band is completed, and a polarization spectrum data set of the sample is obtained. The method has the advantages of simple optical path, low cost, and comprehensive measure information.
Owner:湖北器长光电股份有限公司
Method for measuring radar cross section by using extrapolation method
ActiveCN107192990AAccurate measurementComprehensive measurement resultsWave based measurement systemsRadar cross-sectionSpace radiation
The invention discloses a method for measuring a radar cross section by using an extrapolation method. The method includes the following steps that: the position of a transmitting source is aligned with the position of a measured target, so that the transmitting source can be aligned with the measured position of the measured target; in a process in which the transmitting source leaves the measured target, the radiation power or electromagnetic wave amplitudes of the transmitting source under a plurality of measurement positions and received spatial radiation power or electromagnetic wave amplitudes which are scattered by the target are correspondingly obtained; a radar cross section measurement curve which changes with the distance of the transmitting source and measured target is obtained according to the radiation power or electromagnetic wave amplitudes of the transmitting source under the plurality of measurement positions and the received spatial radiation power or electromagnetic wave amplitudes which are scattered by the target; the function of the change of the radar cross section of the measured target with the distance is obtained according to the radar cross section measurement curve; and the distance infinity limit of the function is solved, so that the radar cross section of the measured target can be obtained. The method has the advantages of high measurement accuracy and wide application range.
Owner:NAT INST OF METROLOGY CHINA
Method and device for liquid density measurement
InactiveCN101520395APracticalRealize read-and-testSpecific gravity by measuring pressure differencesLiquid densityEngineering
The invention discloses a method for liquid density measurement. The method comprises the following steps: arranging two U-shaped pipes in parallel; filling the first U-shaped pipe with a liquid to be measured, and filling the second U-shaped pipe with a standard liquid; applying the same pressure to the two U-shaped pipes simultaneously; and reading the pixel difference between the liquid levels of the two U-shaped pipes through a camera, converting the pixel difference between the liquid levels into the real difference between the liquid levels, and working out the density of the liquid to be measured according to the real difference between the liquid levels and the density of the standard liquid. The invention also provides a device for realizing the method. The device comprises the two U-shaped pipes arranged in parallel. The U-shaped pipes are communicated through a three-way pipe which is also connected with a rubber ball through a control valve. In addition, the camera aims at ports of the first U-shaped pipe and the second U-shaped pipe which are connected with the three-way pipe, and is connected with a processor. The method and the device have simple realization and high operability, and improve the working efficiency and the measurement reliability.
Owner:HUAZHONG UNIV OF SCI & TECH
Gas flux continuous measurement system and measurement method thereof
ActiveCN111398518AImprove automationHigh degree of intelligenceWithdrawing sample devicesGas analyser construction detailsAutomatic controlAir cleaning
The invention relates to a gas flux continuous measurement system and a measurement method thereof. The gas flux continuous measurement system is characterized in that a gas flux measurement loop is formed from a gas outlet of a flux cover to a gas inlet of the flux cover through a first three-way electromagnetic valve, a collection gas pump, a gas sensor and a second three-way electromagnetic valve; a gas outlet of the flux cover passes through the first three-way electromagnetic valve, an adjustable flow meter and a vacuum pump to reach a system exhaust port to form a gas exhaust gas path; and an air cleaning air path is formed from a system air inlet to an air inlet of the flux cover through the one-way valve and the second three-way electromagnetic valve. And a main control circuit controls the communication direction of the electromagnetic valve and the start and stop of each pump, the exhaust gas circuit and the cleaning gas circuit work firstly, and then the measurement loop works. A continuous automatic control system is utilized, the accuracy of gas flux measurement is ensured by periodically replacing background air and regularly measuring the gas concentration of the flux cover, continuous long-term measurement of the flux of hydrogen, mercury and helium in soil is achieved, and seismic fault monitoring is facilitated.
Owner:杭州超钜科技有限公司 +1
Flow field measurement system integrated model machine based on laser absorption spectrum
ActiveCN107064059ACompact structureRich measurement informationColor/spectral properties measurementsPhotovoltaic detectorsAcquisition rate
The invention provides a flow field measurement system integrated model machine based on a laser absorption spectrum. The model machine comprises a tunable semiconductor laser, a laser control circuit, an optical fiber coupling apparatus, a photoelectric detector, a high speed signal acquisition and storage circuit and the like, wherein the tunable semiconductor laser, the optical fiber coupling apparatus and the photoelectric detector are commercial apparatuses; and the laser control circuit and the high speed signal acquisition and storage circuit are independently researched and developed to mainly realize the functions of emitting and controlling lasers and acquiring and storing signals and the like. The model machine is of a high integration density design, and the size of the whole model machine is 20cm*15cm*10cm, the weight is 2.6kg, and the maximum powder consumption is 25W. The model machine supports 16 measurement channels, data is stored online at a high speed, the total storage bandwidth is 160MByte / S, the data can be continuously stored for 26 minutes under the maximum bandwidth condition, and the acquisition rate of the channels can be dynamically configured independently.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
Measuring device for measuring gas parameters of combustion field
PendingCN111141524AIncreased deployment count and coverageHigh reconstruction resolutionInternal-combustion engine testingSingle-mode optical fiberOptical measurements
The invention discloses a measuring device for measuring gas parameters of a combustion field, belongs to the technical field of flow field optical measurement, and can solve the problem of poor measurement result caused by insufficient light distribution in the flow field in the prior art. The measuring device comprises a measuring ring; each laser emitting unit corresponds to each laser receiving unit group, and the corresponding laser emitting unit and laser receiving unit group are respectively arranged on two opposite side walls of the measuring ring; each laser receiving unit group comprises a plurality of laser receiving units arranged in rows; each single-mode optical fiber corresponds to each laser emission unit; each first multimode optical fiber corresponds to each laser receiving unit; the single-mode optical fiber outputs a laser beam to the laser emission unit; the laser emitting unit converts the laser beam into a fan-shaped light beam, and the laser receiving unit converges the fan-shaped light beam irradiated on the laser receiving unit and couples the fan-shaped light beam into the corresponding first multimode optical fiber. The device is used for flow field gasparameter measurement.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV +1
Measuring Radar Scattering Cross Section Area by Extrapolation Method
ActiveCN107192990BAccurate measurementComprehensive measurement resultsWave based measurement systemsRadar cross-sectionSpace radiation
The invention discloses a method for measuring a radar cross section by using an extrapolation method. The method includes the following steps that: the position of a transmitting source is aligned with the position of a measured target, so that the transmitting source can be aligned with the measured position of the measured target; in a process in which the transmitting source leaves the measured target, the radiation power or electromagnetic wave amplitudes of the transmitting source under a plurality of measurement positions and received spatial radiation power or electromagnetic wave amplitudes which are scattered by the target are correspondingly obtained; a radar cross section measurement curve which changes with the distance of the transmitting source and measured target is obtained according to the radiation power or electromagnetic wave amplitudes of the transmitting source under the plurality of measurement positions and the received spatial radiation power or electromagnetic wave amplitudes which are scattered by the target; the function of the change of the radar cross section of the measured target with the distance is obtained according to the radar cross section measurement curve; and the distance infinity limit of the function is solved, so that the radar cross section of the measured target can be obtained. The method has the advantages of high measurement accuracy and wide application range.
Owner:NAT INST OF METROLOGY CHINA
Method and device for measuring pose repetition precision of robot actuator
ActiveCN112781498AHigh measurement accuracy and stabilityImprove efficiencyUsing optical meansPoint cloudSimulation
According to a method and device for measuring the pose repetition precision of a robot actuator, the point cloud of a standard object containing plane features is obtained through a 3D vision sensor, the pose repetition precision of the robot actuator is measured by calculating the statistical characteristics of the plane features, and the method and device have the advantages of high measurement precision stability, easy and convenient operation, convenient setting, low cost, high efficiency, abundant measurement information, convenient simulation of repetition precision under a loaded condition and the like.
Owner:NANJING KINGYOUNG INTELLIGENT SCI & TECH
Integrated Prototype of Flow Field Measurement System Based on Laser Absorption Spectroscopy
ActiveCN107064059BCompact structureRich measurement informationColor/spectral properties measurementsPhotovoltaic detectorsX-ray absorption spectroscopy
The invention provides a flow field measurement system integrated model machine based on a laser absorption spectrum. The model machine comprises a tunable semiconductor laser, a laser control circuit, an optical fiber coupling apparatus, a photoelectric detector, a high speed signal acquisition and storage circuit and the like, wherein the tunable semiconductor laser, the optical fiber coupling apparatus and the photoelectric detector are commercial apparatuses; and the laser control circuit and the high speed signal acquisition and storage circuit are independently researched and developed to mainly realize the functions of emitting and controlling lasers and acquiring and storing signals and the like. The model machine is of a high integration density design, and the size of the whole model machine is 20cm*15cm*10cm, the weight is 2.6kg, and the maximum powder consumption is 25W. The model machine supports 16 measurement channels, data is stored online at a high speed, the total storage bandwidth is 160MByte / S, the data can be continuously stored for 26 minutes under the maximum bandwidth condition, and the acquisition rate of the channels can be dynamically configured independently.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
A Method of Accurately Calibrating Robot Endpoint and Vision System
ActiveCN109719722BRich measurement informationAchieve conversionProgramme-controlled manipulatorComputer graphics (images)Engineering
Owner:NANJING ESTUN ROBOTICS CO LTD
Projection grating phase shift generation dynamic three-dimensional measurement method and system
ActiveCN114322841ABalance Measurement EfficiencyBalance Measurement AccuracyUsing optical meansSinusoidal grating3d image
The invention belongs to the field of moving object surface topography dynamic 3D reconstruction, and particularly relates to a projection grating phase shift generation dynamic 3D measurement method and system, and the method comprises the steps: carrying out the sinusoidal grating projection and sampling of a moving object; fourier spectrum analysis is carried out on the single-frame transient sampling image, and a multi-frame phase shift image sequence is generated; performing high-precision phase solution and phase unwrapping on the phase shift grating sequence by using a phase shift algorithm and a phase unwrapping algorithm to obtain the three-dimensional morphology of the object at the sampling moment; performing 360-degree constant-speed rotation dynamic scanning on the object to obtain three-dimensional shape information of the object at different scanning angles; and carrying out image splicing on the scanned three-dimensional features through a three-dimensional image splicing method so as to obtain 360-degree panoramic dynamic three-dimensional reconstruction information of the measured object. According to the invention, a multi-frame phase shift image sequence is obtained from a single-frame transient sampling image in an image generation mode, so that the measurement precision is effectively improved, and the balance between the measurement efficiency and the measurement precision is realized.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
An Optical Measuring Device for Measuring Gas Parameters in Combustion Fields
ActiveCN110836864BThe number of deployments increasedHigh strengthColor/spectral properties measurementsLight beamOptical measurements
The invention discloses an optical measuring device for combustion field gas parameter measurement, belongs to the technical field of flow field optician measurement, and aims at solving the problem that the measuring results are relatively bad as the light laying quantities in the flow fields are insufficient in the prior art. The optical measuring device comprises a laser emission module and a laser reception module on two opposite sides of a flow field, wherein the laser emission module comprises a collimation unit and a light form conversion unit on the light-out side of the collimation unit; the collimation unit is used for converting the incident laser into a collimation light beam; the light form conversion unit is used for converting the collimation light beam into a fan-shaped surface light source; the laser reception module comprises a deflection unit which is arranged in an irradiation area of the fan-shaped surface light source and a focusing unit which is arranged on the light-out side of the deflection unit; the deflection unit is used for converting the fan-shaped surface light source into a collimation light ray; and the focusing unit is used for focusing the collimation light ray converted by the deflection unit. The optical measuring device is used for the gas parameter measurement of combustion flow fields.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
Device and method for detecting gear shape and performance
InactiveCN104759943BHigh precisionIncrease stiffnessMeasurement/indication equipmentsFeeding apparatusGear wheelCooling effect
The invention discloses a device and a method for detecting gear shape and performance. The device is high in precision, large in rigidity and high in reliability. A bed body substrate follows an environment-friendly machine tool design concept, and the bed body substrate is light in weight, large in rigidity and good in cooling effect; an oblique bed body is fixed on the bed body substrate; a cross sliding table is arranged on the incline of the oblique bed body; the cross sliding table is provided with a direct drive motor; the vertical surface of the oblique bed body adjacent to the incline is provided with a direct drive motor; a mandrel can be arranged in each of the two direct drive motors; the mandrels can clamp a gear; an annular encoder, an acceleration sensor and a sound pick-up are arranged on the device; a mechanical arm system is arranged at the side of the oblique bed body substrate, and the mechanical arm is provided with a grinding burn sensor; the sensor is capable of detecting the vibration, noise, transmission error and grinding burn of the gear. The device for detecting the gear shape and performance is good in stability, small in floor area and high in precision, rigidity and reliability, and the detection of the sensor for the gear shape and performance is well guaranteed.
Owner:BEIJING UNIV OF TECH
A flame temperature field measurement device and method based on projection background schlieren technology
ActiveCN108917943BRealize Projective VisualizationRealize visual measurementSensing radiation from gases/flamesPyrometry using electric radation detectorsBeam splitterRefractive index
The present invention relates to the technical field of flame temperature measurement, and more specifically, provides a flame temperature field measurement device and method based on projected background schlieren technology, using the projected background schlieren technology, based on the principle of air refractive index gradient measurement, Using a semiconductor laser as the light source, the laser beam is shaped into a conical beam by a beam expander, and then divided into two beams by a beam splitter. The reflected beam irradiates the convex lens and enters the test area. The light is disturbed by the change of the refractive index of the flow field. The schlieren image can be directly presented on the projection light screen, realizing the projection visualization of the background schlieren. Then use high-speed CCD fast imaging, combine S-EYE and PIV technology on the PC side to obtain the offset of the particles on the image to quantify the deflection angle, and then use the back-projection reconstruction principle to perform three-dimensional reconstruction of the uneven temperature field to obtain the entire flame area The temperature change trend can realize the visual measurement of the transient flame temperature field, replacing the traditional single-point temperature measurement.
Owner:LINGNAN NORMAL UNIV
An ultrafast ellipsometer device and measurement method
ActiveCN105158165BImplement extractionAchieve non-destructivePolarisation-affecting propertiesOptical propertyPhase difference
Owner:HUAZHONG UNIV OF SCI & TECH
3D measurement system of surface shape based on ray tracing
The invention discloses a three-dimensional surface measurement system for ray tracing, which includes a light source, a shaping and collimating lens, a microreflector array DMD, a TIR prism, a lens group, a sample to be tested, a lens, and a detector containing a precise motion mechanism CCD, the present invention has the following advantages: (1) the present invention adopts the micromirror array DMD device and the light source to accurately control the position of the incident light. (2) The present invention adopts a high-precision motion guide rail and a controller as the positioning of the detector. (3) The present invention is set by the scanning path of the incident light. (4) The present invention can measure various types of samples, including wavefront information of a transmission sample, surface shape and wavefront information of a reflection sample, and information between two surfaces of a transmission sample coated with a semi-transparent and semi-reflective film.
Owner:TIANJIN SINO GERMAN VOCATIONAL TECHNICAL COLLEGE
Method and device for liquid density measurement
InactiveCN101520395BPracticalRealize read-and-testSpecific gravity by measuring pressure differencesLiquid densityEngineering
Owner:HUAZHONG UNIV OF SCI & TECH
A Method for Detecting Transformer Winding Deformation
ActiveCN103743993BRich measurement informationImprove accuracyElectrical testingElectrical resistance and conductanceEngineering
Owner:XI AN JIAOTONG UNIV
Underwater normal sound energy flow measuring device capable of being installed on structure surface
ActiveCN114136427AReduce volumeReduce weightVibration measurement in fluidSubsonic/sonic/ultrasonic wave measurementAccelerometerMeasurement device
The invention discloses an underwater normal sound energy flow measuring device capable of being installed on the surface of a structure, and relates to the technical field of sonar detection. The defects in the prior art are overcome. The system is composed of a vibration and sound pressure sensing module, a data acquisition module, a Fourier analysis module and a sound energy flow synthesis output module. The device has the advantages that the decoupling element is arranged between the piezoelectric element and the accelerometer, the piezoelectric element adopts a radial polarization mode, and the design greatly reduces the direct influence of structural vibration on the piezoelectric element, so that the device can be directly fixedly mounted on the surface of an underwater structure to measure the normal sound energy flow of the surface; the vibration and sound pressure signal sensing module has the advantages of being small in size, light in weight, simple in structure and easy to install, and the influence of elements on structural vibration and a sound field can be effectively reduced.
Owner:HARBIN ENG UNIV
High-resolution orientation resistivity side direction logging instrument and logging method
InactiveCN102767366BEfficient identificationShorten the lengthElectric/magnetic detection for well-loggingSurveyImage resolutionThin layer
The invention relates to an orientation side direction logging instrument and a logging method. A high-resolution orientation resistivity side direction logging instrument mainly comprises an orientation electrode system and a measurement electronic circuit, wherein the electrode system consists of a plurality of side direction electrode rings which have different widths and are embedded on an insulation carrier and an orientation electrode ring M0; the M0 is arranged in the center of the electrode system; 14 electrode rings with different widths and the M0 are in axial symmetry and arranged at different intervals; each homonymic electrode ring is in short circuit through a wire and kept at the same potential; and the homonymic electrode rings, the orientation electrode ring, a reference electrode N and a loop B are connected with the measurement circuit through wires. By the high-resolution orientation resistivity side direction logging instrument and the logging method, a high-resolution side direction curve and an orientation side direction curve can be measured at the same time, and relatively detail logging information can be supplied to logging evolution; the high-resolution logging instrument can identify a thin layer and a thin mutual layer of which the thickness is 0.2 meter, so that an effective logging curve is supplied to thin layer logging; and cracks and caves can be effectively identified.
Owner:THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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