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52results about How to "Guaranteed high precision measurement" patented technology
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High-accuracy remote absolute displacement measurement system based on optical fiber composite interference
InactiveCN102564317AHigh precision measurementRealize remote measurementUsing optical meansPhysicsLight source
The invention discloses a high-accuracy remote absolute displacement measurement system based on optical fiber composite interference, which belongs to the technical field of optical measurement and is composed of a board band light source, an optical fiber isolator, three 3dB couplers, four auto-collimation mirrors, two optical fiber gratings, four reflectors, two detectors, a circulator, a one-dimensional translation platform, piezoelectric ceramics, a feedback control circuit, a signal generator, a signal treatment circuit, an analog to digital (A / D) conversion card, a computer and result output. The high-accuracy remote absolute displacement measurement system uses an optical fiber interferometer to induce displacement and another optical fiber interferometer to demodulate displacement to achieve remote measurement. The optical fiber interferometer for demodulation works in a low coherence interference state and a high coherence interference state, and amplitude of displacement can be determined by low coherence signals to achieve absolute measurement. A value of the displacement can be measured by high coherence signals to feed back and control effects of environment interference on the demodulating optical fiber interferometer, and high-accuracy measurement can be obtained.
Owner:BEIJING JIAOTONG UNIV
Distributed POS (Position and Orientation System) sub-IMU (Inertial Measurement Unit) synchronous data acquisition system
InactiveCN102736591AGuaranteed high precision measurementEfficient integrationNavigation instrumentsTotal factory controlAccelerometerGyroscope
A distributed POS (Position and Orientation System) sub-IMU (Inertial Measurement Unit) synchronous data acquisition system comprises a synchronous control / data receiving module based on FPGA (Field Programmable Gate Array), a high-speed asynchronous serial bus and a data acquisition / processing module based on ARM (advanced RISC machine), wherein the synchronous control / data receiving module based on FPGA realizes the control of time synchronization of a distributed POS system and receives data of a plurality of sub IMUs in real time; the high-speed asynchronous serial bus realizes communication between the master POS and sub IMUs at different measurement nodes; and the data acquisition / processing module based on ARM realizes parallel acquisition and real-time processing of the signal of a fiber-optic gyroscope, the signal of an accelerometer and the temperature signals of the gyroscope and the accelerometer. The distributed POS sub-IMU synchronous data acquisition system realizes real-time data acquisition of a plurality of sub IMUs of the distributed POS, reduces the size and power consumption of the sub IMUs, meets the requirement of miniaturization of the subsystem and simultaneously realizes time synchronization of the distributed POS system.
Owner:BEIHANG UNIV
Laser thickness gauge
ActiveCN102175165AHigh precision measurement stabilityGuaranteed high precision measurementUsing optical meansPole pieceAccuracy and precision
The invention discloses a laser thickness gauge for measuring the thickness of a battery pole piece. The laser thickness gauge comprises a measurement assembly and a wearing assembly. The measurement assembly comprises a position adjustor and a sensor arranged on the position adjustor, the battery pole piece is arranged on the wearing assembly, the sensor measures the thickness of the battery pole piece, and the measurement assembly spans the wearing assembly. Compared with the prior art, the laser thickness gauge has the advantages of high measurement precision and good stability.
Owner:DONGGUAN AMPEREX TECH +1
Two-axis attitude dip angle measurement method
ActiveCN107607113AHighly integratedImprove performanceNavigation by speed/acceleration measurementsKaiman filterGyroscope
The invention discloses a two-axis attitude dip angle measurement method. The method comprises S1, accurately estimating initial values of a roll angle and a pitch angle in a quasi-static state basedon a three-axis accelerometer space geometric model and setting the initial values as state input of a kalman filter, S2, setting two-axis dip angle zero offsets biasroll and biaspitch as state inputof the kalman filter, S3, setting measured values Gyrox and Gyroy of an X-axis gyroscope and a Y-axis gyroscope as input vectors of the kalman filter, and S4, building a system kalman filter state equation containing four state vectors and two observation vectors and a measurement equation and precisely measuring two-axis attitude dip angles. The method considers two-axis dip angle zero offsets, realizes automatic correction through a kalman filter fusion method and guarantees the high-precision measurement of the two-axis attitude dip angle.
Owner:SOUTH CHINA AGRI UNIV
Small gapping place relatively rotating measuring and rotating positioning system and method
InactiveCN101419064AStrong process adaptabilityEasy to debugUsing optical meansPhotomechanical exposure apparatusPhysicsVertical orientation
The invention discloses a system and a method for the high-precision measurement direction sensing and rotary positioning of relative micro-rotation between two planes. Two gratings are arranged on the two planes to form two groups of measurement grating pairs. When the amount of relative rotation between the two planes is zero, grid lines of all gratings are in the same direction. Two groups of measurement grating pairs are opposite in the size relation of grating size but identical in period ratio. The number of fringes acquired by a measurement system is not less than 40. The method for measurement direction sensing and rotary positioning comprises the following steps of adopting the dimensions of fringe inclination angles obtained in the horizontal-vertical direction and two diagonal directions to obtain the directions of the fringe inclination angles. When two groups of interference fringes are identical in direction, rotary zero-point positioning is realized between the two planes, and when two groups of interference fringes are different in direction, relative rotation amount exists between the two planes.
Owner:XI AN JIAOTONG UNIV
Method for collecting current on low-voltage side of electric furnace transformer and relay protection device
InactiveCN102435813AEasy to installGuaranteed measurementCurrent/voltage measurementEmergency protective circuit arrangementsShielded cableElectric arc furnace
The invention relates to a method for collecting current on the low-voltage side of an electric furnace transformer and a relay protection device. The relay protection device comprises electronic current sensors penetrating through corresponding terminals of lead conductors in parallel connection between the low-voltage side output terminal of the electric furnace transformer and an electric furnace electrode, wherein the signal output ends of each electronic current sensor are connected with each other in series, and are connected with a signal conditioning unit through a shielded cable. The technical scheme can be used for solving the difficult problems of measuring large current on the low-voltage side of the electric furnace transformer as well as the failing to achieve differential protection of the electric furnace transformer, and can meet the requirement on linearity and large-current unsaturation of differential protection.
Owner:XJ ELECTRIC +3
Shipborne underway water environment parameter measurement system and method
ActiveCN103389363AEfficient measurementPrecise track dataTesting waterMachines/enginesExhaust valveStream flow
The invention provides shipborne underway water environment parameter measurement system and method. The shipborne underway water environment parameter measurement system comprises a sampling module 1, a flow measurement module 2, a measurement chamber 3, a water sample measurement module 4, a control protection module 5, a GPS (global position system) module 6, a power supply module 7 and a data processing and display system 8, wherein an overflow port 9 and an exhaust port 10 are respectively formed in the top and the bottom of the measurement chamber 3; an exhaust valve 11 is arranged at the exhaust port. By adopting the data processing and display system 8, the data obtained by the GPS module 6 and the flow measurement module 2 can be utilized to calculate sampling flow velocity in real time, so that accurate track data are obtained; efficient real-time measurement of water space information is achieved. The shipborne underway water environment parameter measurement system and method are simple and convenient to operate, and high in measurement accuracy, and have good versatility and expandability.
Owner:WUHAN UNIV
Multi-point temperature measurement method and temperature measurement equipment for down-hole formation
The invention provides an underground formation multipoint temperature measurement method which includes the following steps: setting a plurality of armored thermocouples, one end of which are connected with compensating wires; choosing one protection tube, the wall of which is provided with fixing holes formed at intervals along the axle direction according to the detecting points; penetrating the compensating wires connected with armored thermocouples in the protection tube and then out from the tube mouth, and limiting and fixing the protection lining of the armored thermocouples at the fixing holes; connecting the compensating wires out of the tub mouth with a multi-channel temperature measurement instrument display; extending the protection tube with the armored thermocouples into a well; and measuring the temperature. Formation temperatures at different depths can be measured by the method using only one pipeline; the armored thermocouples are fixed at the fixing holes of the tube wall that contacting outside directly, thus guarantee the high measurement precision; and the thermocouples with metal armor are not easy to be damaged during assembly, thus greatly prolonging the service time.
Owner:SHANGHAI UNIV OF ENG SCI
On-line measuring device for fly ash carbon content of flue
ActiveCN103439300AGuaranteed high precision measurementSolve the problem of clogged sampling gunAnalysis by material excitationPhysicsFlue
The invention discloses an on-line measuring device for a fly ash carbon content of a flue, and belongs to the technical field of fly ash detection of boiler flues. The measuring device comprises a measuring probe and a measuring and analyzing unit, wherein the measuring and analyzing unit comprises a laser device, a spectrograph and control equipment; the control equipment is connected with the laser device and the spectrograph; the measuring probe comprises a housing, a laser focusing module and a spectral signal collection module; the laser focusing module and the spectral signal collection module are mounted in the housing; the laser focusing module is connected with the laser device; the spectral signal collection module is connected with the spectrograph; an opening of the housing of the measuring probe is formed in an inner wall of the flue; a gas blowing device is arranged on the edge of the opening of the housing; gas blown out by the gas blowing device forms a gas curtain; and focusing areas of the laser focusing module and the spectral signal collection module are located in the flue on the outer side of the gas curtain. The measuring device solves the problem that fly ash blocks a sampling gun due to the fact that the fly ash is required to be taken out of the flue by the sampling gun.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +2
Optical fibre connector face geometrical parameter measuring instruments
InactiveCN1584533AHigh measurement accuracyGuaranteed high precision measurementOptical apparatus testingBeam splitterMeasuring instrument
A measurer applying Twyman-Green interferometer structure is featured as having light source, setting collimation extender system, beam-splitter, light chopper and plane reflector bound on piezoelectric ceramics in sequence on th same optical axis; setting optical fibre connector at one end of beam splitter and lens as well as detector on another end, connecting detector to computer through A / D converter and connecting computer to the piezoelectric ceramics through driving circuit.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Meter-scale grating diffraction wave-front splicing detection device and detection method
InactiveCN105973163AReduce numbers and measure stitching timeImprove measurement repeatabilityUsing optical meansOptical apparatus testingPhysicsData lines
A meter-scale grating diffraction wave-front splicing detection device and a detection method are disclosed. The device comprises a Fizeau interferometer and an interferometer standard lens, and is characterized by further comprising an electronically-controlled air floating translation table, a two-dimensional adjustment object stage, a control system, and a computer, wherein the two-dimensional adjustment object stage is fixed to the electronically-controlled air floating translation table, the output end of the control system and the control end of the electronically-controlled air floating translation table are connected by a cable, the control system and the Fizeau interferometer are connected to the computer by data lines, the angle at which a meter-scale grating to be detected is placed is equal to the diffraction angle of the meter-scale grating to be detected, and the center height at which the meter-scale grating to be detected is fixed to the two-dimensional adjustment object stage is the same with the center height of the interferometer standard lens. The invention provides an effective means of detection for meter-scale gratings, and the test diameter of the original Fizeau interferometer is expanded. The meter-scale grating diffraction wave-front splicing detection device and the detection method have the characteristics of low cost, simple structure and high precision, and have great engineering application value.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Current transformer capable of broadband wide-width measurement and magnetic interference resistance
PendingCN110658374AGuaranteed high precision measurementQuick responseInstrument screening arrangementsCurrent measurements onlyMagnetic disturbancePower factor
The invention discloses a current transformer capable of broadband wide-width measurement and magnetic interference resistance, and belongs to the technical field of transformers. A signal conditioning circuit comprises an induction circuit, a differential amplification circuit and a power amplification circuit; a Hall chip of the induction circuit is fixed in an air gap formed in the magnetic core; the output end of the power amplification circuit is connected with one end of a secondary coil; the other end of the secondary coil is connected in series with a first sampling resistor Rm1 and then is grounded; the point where the first sampling resistor Rm1 is grounded serves as a negative signal output end M1-; the point where the first sampling resistor Rm1 is connected with the secondarycoil serves as a positive signal output end M1+; the signal conditioning circuit further comprises a constant voltage source circuit; and the output end of the constant voltage source circuit is connected with the Hall chip. Under the condition that there is external magnetic interference in a broadband and wide-width range, the current can be still measured in high precision, DC and harmonic components in the current can be accurately measured, and measurement is not influenced by a power factor.
Owner:HEBEI SHENKE ELECTRONICS CO LTD
Human eye strabismus direction and strabismus degree measurement device
The invention belongs to the field of strabismus measurement devices, and particularly relates to a human eye strabismus direction and strabismus degree measurement device. The device comprises an eyetracker, a controller, a processor and VR glasses; the controller is used for controlling an indicator to move, so that human eyes wearing the VR glasses are in a natural staring state on the indicator in the glasses; then left and right side pictures of the VR glasses are alternately closed; the eye tracker is used for shooting pupil pictures of the closed side before and after each closing; andthe processor is used for judging whether the pupil of the human eye on each side moves or not and determining the moving direction based on the pupil pictures, corresponding to the side, before andafter closing. In addition, the controller also closes a main eye picture when the human eyes are in the natural staring state on the target indicator, and meanwhile rotates a strabismus eye picture according to the strabismus direction, so that the target indicator is located in the direction where the pupil of a strabismus eye faces, and the total rotation angle is the strabismus degree. The device is not affected by subjectivity of a subject, the staring degree and the cooperation degree are high, and the measurement result is reliable.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for high-precision measurement of sphericity of micro-spherical probe of nanometer three-coordinate measuring machine
InactiveCN107218879AEliminate radial errorsRealize high-precision measurementElectric/magnetic contours/curvatures measurementsPoint coordinate measurementsMicrosphereSpherical probe
The invention discloses a method for high-precision measurement of the sphericity of the micro-spherical probe of a nanometer three-coordinate measuring machine. A tungsten probe with large length-to-diameter ratio and a quartz tuning fork are combined. Scanning probe heads with nanometer-level resolution are constructed based on a precision micro stage. During measurement, the two scanning probe heads are driven by the micro stage to scan the large-section contour of a microsphere in the x-axis direction in a differential manner. Radial error generated in the scanning process can be automatically eliminated in a differential manner, and thus, accurate parameters of the large-section contour of the microsphere can be obtained. After the microsphere is rotated a certain angle, the measurement is repeated to acquire multiple sets of parameters of the large-section contour. A three-dimensional spatial contour of the microsphere is constructed through fitting according to feature points obtained. The geometric parameters of the microsphere are calculated based on the three-dimensional spatial contour. Thus, high-precision measurement of the sphericity of the microsphere is realized. The method has the characteristics of small measuring force, wide measuring range, and high measuring precision.
Owner:HEFEI UNIV OF TECH
Pressure sensor based on thermal resistance principle and working method thereof
InactiveCN107014551ASimple structureCompact structureFluid pressure measurement by electric/magnetic elementsElectrical resistance and conductanceEngineering
The present invention discloses a pressure sensor based on the thermal resistance principle and a working method thereof. The pressure sensor is simple in structure. Based on the thermal resistance principle, the pressure test is conducted, so that the test convenience is improved. The pressure sensor comprises a substrate, a thin film, a first thermal resistor and a second thermal resistor. The upper part of the substrate is provided with a cavity. The thin film is grown on the top surface of the substrate. The thin film is covered above the cavity. The first thermal resistor and the second thermal resistor are respectively positioned in the cavity.
Owner:SOUTHEAST UNIV
Full-automatic current comparator high-voltage bridge based on FPGA and voltage control current source
ActiveCN106124823AFully automatedGuaranteed high precision measurementResistance/reactance/impedenceAc/dc measuring bridgesCapacitanceTest sample
The invention provides a full-automatic current comparator based on an FPGA and a voltage control current source. The full-automatic current comparator high-voltage bridge comprises the components of a voltage divider, a high-voltage power supply, the FPGA, a first analog input module, a second analog input module, an RT, an industrial personal computer, a voltage control current source, an analog output module, a programmable amplifier, a current comparator and a tested sample. The current comparator comprises a testing coil, a first proportional coil and a second proportional coil. The testing coil and the programmable amplifier are used for testing the balance degree of the current comparator. The two proportional coils with fixed numbers of coils are respectively connected with the tested sample and the voltage control current source. Comparative current measurement of the sample current is realized according to an ampere turns balance principle. The full-automatic current comparator high-voltage bridge based on the FPGA and the voltage control current source can realize measurement on capacitance and loss factor of a capacitive tested sample and measurement on inductance and quality factor of an inductive tested sample in a high-voltage condition.
Owner:HARBIN UNIV OF SCI & TECH
Back reflection structure digital X-ray crystal orientation device and X-ray detector thereof
InactiveCN105628721AIncrease contrastGo digitalMaterial analysis using wave/particle radiationFiberX-ray
The invention discloses a back reflection structure digital X-ray crystal orientation device and an X-ray detector thereof. The X-ray detector comprises a scintillation screen, a fiber optic taper, a photosensitive element, a digital circuit board, a heat conduction element and a ray collimator, wherein a center through hole extending to the back side of the scintillation screen from the front side of the scintillation screen is formed in the scintillation screen, the fiber optic taper is connected to the back side of the scintillation screen, the photosensitive element is connected to the back side of the fiber optic taper, the rear end of the photosensitive element is connected to the front surface of the digital circuit board, the heat conduction element is connected to the rear surface of the digital circuit board and conduct heat conduction on the photosensitive element, the rear end of the ray collimator is connected to the emission end of an X-ray machine, and the front end of the ray collimator extends to the front side of the scintillation screen from the center through hole. By the adoption of the back reflection structure digital X-ray crystal orientation device and the X-ray detector thereof, orientation analysis precision and efficiency can be improved remarkably.
Owner:INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI +1
Automatic lifting locking mechanism
ActiveCN111457223AGuaranteed high precision measurementStable working platformNavigational aid arrangementsStands/trestlesVertical planeRadar
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Low-power-consumption tilt angle sensor based on NB-IOT Internet of Things
InactiveCN112697107AEasy to installReduce energy consumptionPower managementParticular environment based servicesUncrewed vehicleControl theory
The invention discloses a low-power-consumption tilt angle sensor based on the NBIOT Internet of Things, and relates to the technical field of sensors. The low-power-consumption tilt angle sensor comprises a shell and a mounting plate, the shell and the mounting plate are fastened through bolts to clamp a measured piece 15, and a power storage module, a charging module, a control module, a sensor measurement module and a communication module are arranged in the shell separately. An acceleration sensor for measuring inclination angle changes is arranged in the sensor measuring module, a plane plate parallel to the XY plane of the acceleration sensor is fixed to the lower portion in the shell, a plurality of pressure-sensitive induction blocks which are evenly distributed are fixed to the lower portion of the plane plate, and the pressure-sensitive induction blocks are symmetrically distributed in the X direction and the Y direction of the acceleration sensor. The lower portion of each pressure-sensitive induction block is connected with an ejector rod through a spring. The tilt angle sensor can be used for a long time in various environments, is convenient to install, keeps high-precision measurement, especially outdoors, and can be widely applied to the fields of bridges, unmanned aerial vehicles, ships and the like.
Owner:深圳市瑞芬科技有限公司
Three-point cylindricity measuring device and cylindricity error separating method based on V-shaped block
ActiveCN108534735APortableImprove in-situ measurement accuracyMeasurement devicesEngineeringCylindrical power
The invention discloses a three-point cylindricity measuring device and a cylindricity error separating method based on a V-shaped block, which are used for measuring the cylindricity of a cylindricalmeasured object. The device is characterized in that the measured object takes an outer cylindrical surface in the axial direction as guide rails, and the V-shaped block is used as an axial sliding measurement rack; sensors are arranged on the V-shaped block; the sliding measurement rack is supported by the outer cylindrical surface of the measured object by using V-shaped surfaces of the V-shaped block; the V-shaped block moves according to the axial direction of set intervals to obtain corresponding measurement positions of the measured object; on the measurement positions, the measured object is driven by a rotary supporting shaft system of the measured object to rotate for one circle, the circumferential position of the V-shaped is kept unchanged, and the V-shaped surface of the V-shaped block is kept in contact with the outer cylindrical surface of the measured object. The three-point cylindricity measuring device and the cylindricity error separating method disclosed by the invention are especially applied to cylindrical profile measurement reconstruction; portable large-sized cylindrical profile in-situ measurement can be realized; the measurement is irrelevant to an in-situ rotary supporting shaft system and in-situ guide rails, and full-harmonic separation of all error motions in the measurement process is realized at the minimum quantity of sensors, so that high precision of cylindrical profile measurement reconstruction is ensured.
Owner:HEFEI UNIV OF TECH
A Quick Clamping Device for Large Diameter Ultra-thin Plate
ActiveCN104166210BEasy to operatePrecise positioningMountingsMechanical engineeringPositioning system
The invention relates to a rapid clamping apparatus of a large-aperture ultrathin flat plate. The rapid clamping apparatus mainly comprises a positioning assembly, a compaction assembly, a rotation assembly and a compaction assembly. The rapid clamping apparatus of the large-aperture ultrathin flat plate is simple in operation and accurate in positioning, can rapidly finish positioning and locking of a flat plate group during measurement, and realizes three-step accurate positioning installation during the measurement for each time. When posture adjustment is performed on a large-dimension flat plate, a center position maintains unchanged, and the high-precision measurement of a plat plate indicator is ensured.
Owner:XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Rapid clamping apparatus of large-aperture ultrathin flat plate
The invention relates to a rapid clamping apparatus of a large-aperture ultrathin flat plate. The rapid clamping apparatus mainly comprises a positioning assembly, a compaction assembly, a rotation assembly and a compaction assembly. The rapid clamping apparatus of the large-aperture ultrathin flat plate is simple in operation and accurate in positioning, can rapidly finish positioning and locking of a flat plate group during measurement, and realizes three-step accurate positioning installation during the measurement for each time. When posture adjustment is performed on a large-dimension flat plate, a center position maintains unchanged, and the high-precision measurement of a plat plate indicator is ensured.
Owner:XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Optical fibre connector face geometrical parameter measuring instruments
InactiveCN1277109CHigh measurement accuracyGuaranteed high precision measurementCoupling light guidesTesting optical propertiesBeam splitterPhotovoltaic detectors
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Electronic transformer of electric energy meter
InactiveCN109709369AGuaranteed high precision measurementReduce mistakesCurrent/voltage measurementVoltage/current isolationElectrical resistance and conductanceTransformer
The invention discloses an electronic transformer of an electric energy meter. The electronic transformer comprises a housing and a current connecting piece. An electromagnetic induction component isinstalled in the housing and includes a notched high-permeability magnetic core; a coil winds around the notched high-permeability magnetic core; a tunnel magneto-resistive chip is mounted on the notch of the notched high-permeability magnetic core and is connected with the coil by a circuit; the coil is connected to the main circuit board by a circuit; and the current connection piece passes through the notched high-permeability magnetic core. Therefore, the high-precision measurement of the current can be kept without being affected by the power factor. The influence errors on the direct current and even-order harmonics in the AC line are extremely low.
Owner:宁波泰丰源电气有限公司
Method for detecting expansion force of lithium battery
PendingCN114062945AGuaranteed high precision measurementGuaranteed uptimeElectrical testingElectrical/magnetic solid deformation measurementMathematical modelEngineering
The invention relates to a method for detecting the expansion force of a lithium battery in the field of battery testing, and the method comprises the steps of data measurement, data processing, mathematical model construction, expansive force conversion and the like, a strain gauge is adopted to measure battery data, the expansive force is calculated by constructing a mathematical model of expansive force and a strain value. By adopting the strain gauges, the required deformation quantity and expansive force can be obtained under the condition that the structure of the battery is not influenced, high-precision measurement can be ensured, and long-term stable operation can be realized, so that the expansive force of the battery pack can be tested.
Owner:深圳市宾凯腾科技有限公司
Digital display type Michelson interferometer automatic measurement system and method
InactiveCN105606231ARealize digital display integrationReduce configurationOptical measurementsEngineeringMichelson interferometer
The invention discloses a digital display type Michelson interferometer automatic measurement system and method. The system comprises a fine tuning handwheel driving apparatus, an interference ring measurement apparatus, a control digital display host, a Michelson interferometer and an interference fringe observation screen, wherein the fine tuning handwheel driving apparatus clamps a fine tuning handwheel of the Michelson interferometer to drive the fine tuning handwheel to rotate synchroneously to enable a moving mirror of the Michelson interferometer to go forward or backward; the interference ring measurement apparatus is arranged on the interference fringe observation screen and is connected with the fine tuning handwheel driving apparatus; and the control digital display host is connected with the fine tuning handwheel driving apparatus. The system provided by the invention is exquisite and reasonable in structure and convenient to use, satisfies the requirement of a Michelson interferometer for stable operation during work, ensures measurement precision of the Michelson interferometer and also has the advantages of wider application, higher cost performance and the like compared to similar products.
Owner:黎碧莲 +1
Relative rotation measuring and rotating positioning system and method for small gapping place
InactiveCN101419064BHigh precisionStrong process adaptabilityUsing optical meansPhotomechanical exposure apparatusGratingClassical mechanics
The invention discloses a system and a method for the high-precision measurement direction sensing and rotary positioning of relative micro-rotation between two planes. Two gratings are arranged on the two planes to form two groups of measurement grating pairs. When the amount of relative rotation between the two planes is zero, grid lines of all gratings are in the same direction. Two groups of measurement grating pairs are opposite in the size relation of grating size but identical in period ratio. The number of fringes acquired by a measurement system is not less than 40. The method for measurement direction sensing and rotary positioning comprises the following steps of adopting the dimensions of fringe inclination angles obtained in the horizontal-vertical direction and two diagonal directions to obtain the directions of the fringe inclination angles. When two groups of interference fringes are identical in direction, rotary zero-point positioning is realized between the two planes, and when two groups of interference fringes are different in direction, relative rotation amount exists between the two planes.
Owner:XI AN JIAOTONG UNIV
A 3D Profile Measurement System
ActiveCN108827187BStable and high-precision measurement capabilityReliable and high-precision measurement capabilityUsing optical meansStructured lightSystematic measurement
The invention relates to a measuring system for measuring the three-dimensional contour of a workpiece. The measuring system comprises a workbench, a controller and a data processing and analysis system. The system also comprises a structured light measurement system, a tip and turntable system and a three-coordinate measurement system, which are arranged on the workbench. The structured light measurement system is used for measuring the complex curved surface of the workpiece in a high-speed manner; the three-coordinate measurement system is used for measuring the complex fine portion of theworkpiece to ensure obtaining of high-precision and reliable measurement data of the portion, wherein the measurement data of the three-coordinate measurement system is used for establishing a measurement reference of the workpiece; the tip and turntable system is used for clamping the workpiece and driving the workpiece to rotate to obtain measurement data of the workpiece at different angles bycombining the structured light measurement system; and finally, full-profile three-dimensional contour of the workpiece can be obtained by carrying out coordinate system unification on the measurementdata of the three-coordinate measurement system and the structured light measurement system. The measuring system integrates the advantages of high precision and reliability of the three-coordinate measurement system and high measurement speed of the structured light measurement system and the like.
Owner:XI AN JIAOTONG UNIV
A system and method for measuring water environment parameters on board a ship
ActiveCN103389363BEfficient measurementPrecise track dataTesting waterMachines/enginesExtensibilityExhaust valve
The invention provides shipborne underway water environment parameter measurement system and method. The shipborne underway water environment parameter measurement system comprises a sampling module 1, a flow measurement module 2, a measurement chamber 3, a water sample measurement module 4, a control protection module 5, a GPS (global position system) module 6, a power supply module 7 and a data processing and display system 8, wherein an overflow port 9 and an exhaust port 10 are respectively formed in the top and the bottom of the measurement chamber 3; an exhaust valve 11 is arranged at the exhaust port. By adopting the data processing and display system 8, the data obtained by the GPS module 6 and the flow measurement module 2 can be utilized to calculate sampling flow velocity in real time, so that accurate track data are obtained; efficient real-time measurement of water space information is achieved. The shipborne underway water environment parameter measurement system and method are simple and convenient to operate, and high in measurement accuracy, and have good versatility and expandability.
Owner:WUHAN UNIV
Lithium battery film thickness gauge
ActiveCN113188499ASmall compression deformationGuaranteed high precision measurementMeasurement devicesEngineeringMechanical engineering
The invention discloses a lithium battery film thickness gauge which comprises a measuring base, a measuring arm, a film moving mechanism, a lifting mechanism and a measuring mechanism, wherein the measuring arm is arranged on the measuring base; the lifting mechanism is arranged on a measuring wall; the measuring mechanism is arranged on the lifting mechanism; the film moving mechanism is arranged on one side of the measuring base; a measurement position on the measurement base is connected with an adsorption device; and the measuring mechanism comprises a measuring probe, a micro sensor and a high-precision analog-to-digital conversion module. According to the lithium battery film thickness gauge, the contact surface is increased and the compression deformation of the film is reduced by the measuring mechanism, and high-precision measurement is ensured; the lifting structure is used for avoiding compression deformation of the film caused by rapid movement impact; an over-range gap is connected between the lifting rod and the sensor, so that the influence of the lifting mechanism on the sensor is avoided; the film moving mechanism avoids deformation caused by manual dragging, so that the movement is smooth and uniform; and the measurement position is connected with the adsorption device, so that the film is in complete contact with the measurement platform, and accurate measurement is ensured.
Owner:马尔精密量仪(苏州)有限公司
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