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47results about How to "Measuring equipment is simple" patented technology
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Measuring device and calibration method for optical lens distortion
InactiveCN103292981ANo complex alignment process requiredHuman factors are smallTesting optical propertiesCamera lensSingle star
Provided is a measuring device and a calibration method for optical lens distortion. The measuring device comprises a single star light simulator, an adjusting rack, a to-be-tested lens, a CCD (charge coupled device) camera, a one-dimensional air flotation turntable, an angle encoder, a computer and an optical platform. The calibration method includes the steps of using a centroid localization algorithm to determine centroid position coordinates of a star point image when the to-be-tested lens is under different fields of view, establishing a calibration model for the to-be-tested lens distortion based on the distribution of the centroid position coordinates of the star point image under the entire field of view, and realizing the calibration of the distorted to-be-tested lens. The measuring device and the calibration method for the optical lens distortion has the advantages that the device is simple; the method is convenient; measurement accuracy is high; and the optical lens distortion can be easily measured and calibrated.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Rolling object monocular pose measurement method based on color image
ActiveCN104764440ALarge measurement field of viewSolve the problem of marker features being occludedPhotogrammetry/videogrammetryColor imageImaging processing
The invention provides a rolling object monocular pose measurement method based on a color image, belongs to the field of computer vision and relates to a method of rolling object model pose measurement with the principle of monocular vision with combination of a self-luminous coding mark point. In the method, by means of a manner of surrounding grouped arrangement, color-coded self-luminous mark points are arranged on a surface of a to-be-measured object, and then post measurements, comprising six parameters: displacements in the directions of X, Y and Z, pitching angle, yaw angle and rolling angle. With the color-coded self-luminous mark points on the surface of the to-be-measured object as a characteristic marker, a color-coded characteristic image on the surface of the moving target is collected. Finally, on the basis of calibration by a high-speed camera, through an image processing step including recognition and extraction of the image being marked by the color-coded mark, the target position pose information of the rolling object is solved. In the method, by means of a monocular camera with combination of color image for measurement, the method is high in measurement efficiency, is simple in required equipment and is wide in available range.
Owner:DALIAN UNIV OF TECH
Dual-optical-frequency-comb linear spectral encoding imaging method
InactiveCN109141276AMeasuring equipment is simpleInformativeScattering properties measurementsUsing optical meansReflectivityContinuous measurement
The invention discloses a dual-optical-frequency-comb linear spectral encoding imaging method. According to the method, two optical frequency combs with locked repetition frequencies are used, and thetwo optical frequency combs output signal light and local oscillator light respectively. The signal light is divided into detection light and reference light. The detection light passes a spectral encoder to be focused on the surface of a sample to be measured, the sample to be measured is encoded, and then the sample to be measured and the local oscillator light are subjected to dual-optical-frequency-comb heterodyne interference. The reference light directly interferes with the local oscillator light. Two interference pulse signals are generated and are converted into digital signals by signal acquisition. Optical reference compensation detection jitter is used, and a sample absolute distance with high precision and high stability, a linear reflectivity and phase information are obtained. The sample is moved linearly, continuous measurement is performed, and a 3D topographic image and a 2D reflectance image with high precision are achieved. The dual-optical-frequency-comb linear spectral encoding imaging has the advantages of simple structure, high measurement speed, high precision, a large amount of information and high expansion.
Owner:EAST CHINA NORMAL UNIVERSITY
Method for measuring rolling resistance coefficient of vehicle
ActiveCN102323206AHigh precisionMeasuring equipment is simpleWeather/light/corrosion resistanceAutomotive engineeringRolling resistance
The invention discloses a method for measuring a rolling resistance coefficient of a vehicle by adopting a load changing method. The method for measuring the rolling resistance coefficient of the vehicle comprises the following steps of: calculating to acquire a running resistance and vehicle speed curve under conditions of masses m1 and m2 of the vehicle through a road sliding test; calculating to acquire an average value of increments, caused by the change of the mass, of running resistances; and finally calculating the rolling resistance coefficient. Compared with the conventional measurement method, the method has the advantages that measurement equipment is simple, the cost is low and the precision of the measured result is high.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD
Movement direction angle polarization sensitivity detection method and sensor device
InactiveCN101149390AMeasuring equipment is simpleEasy to implementIndication/recording movementConverting sensor output opticallyOptical polarizationSensor field
This invention imitates the mechanism that the desert ant apperceives the move direction according to the sky polarized light, advances a kind of polarized sensitivity detection move direction method and sensor equipment facing to the navigation application, it belongs to the navigational goniometric sensor field. The polarization navigational sensor is mainly composed of the polarized light detection, the photoelectricity conversion, signal amplification filtering conditioning, directional light intension distinguish, simulation pressure signal collection process, azimuth angle calculate output. This invention is optical-mechanical-electrical integral design, solves the problem that the sky polarized light wave range is too large and the polarized light intension conversion range in different time is too large by choosing the specific bandpass light filter and high precision logarithm operation amplification, to make the sensor angle output be independent of the light intension conversion; at the same time it uses the particular angle normalization calculation method to remove the effect to the sensor goniometric precision because of the conversion of the sky polarized light polarized range. This invention has the merits that the structure is simple, the capability is trust, the goniometric precision is high.
Owner:DALIAN UNIV OF TECH
Equipment and method for testing range capability of laser altimeter and diastimeter
InactiveCN1544915AMeasuring equipment is simpleEasy to measureMaterial analysis by optical meansEnvironment effectWave shape
The invention is a device of measure distance finding ability of laser finder / range finder, and its character of composition: in the forward direction of the laser beam emitted by a laser emitting system of the laser finder, in sequence, it includes transmitting-reflecting mirror, reflecting mirror, attenuator, and simulated object, where there is an energy meter set in the transmitting direction of the transmitting-reflecting mirror, which makes an angle of 45 degrees with the light beam, so does the reflecting mirror and the two mirrors play the same role in turning the laser beam emitted to make the laser beam coaxial with the laser receiving system of the laser finder; also waveform display system. It has the advantages of simple device, convenient operation, indoor testing, no influence of environment, high measuring precision, etc.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Multi-line laser radar calibration system and calibration method
PendingCN110456328AOutstanding FeaturesHighlight significant technological advancesWave based measurement systemsTotal stationLaser beams
The invention relates to a multi-line laser radar calibration system and a calibration method. The system is characterized by comprising a horizontal levelling table, a switching frame, a reflecting target, a total station, a computer, a laser ranger and a GPS antenna; the horizontal levelling table is arranged on a support frame, a digital display level meter is configured to monitor and judge the levelling of the horizontal leveling table; the switching frame is a connecting structure connected with the laser radar in a vertical direction and a horizontal direction, and an inertia measurement unit IMU is arranged on the switching frame; the reflecting target is arranged at a relative location of the switching frame so as to form a region for constraining a laser beam; the total station is arranged between the switching frame and the reflecting target to form an elevation measurement structure; the computer is arranged on the support frame, an I / O port thereof is connected with a signal output end of the digital display level meter, the signal output end of the laser ranger, the signal output end of the total station and the signal output end of the GPS antenna, thereby forming anautomatic monitoring structure to monitor the laser reflectivity change and read and record inertia measurement unit IMU attitude angle. The system has the characteristics of being high in calibration efficiency, high in calibration precision, low in field requirement, and convenient to execute.
Owner:佛山市云展智能科技有限公司
Method and device for measuring rotation speed of moving ball
ActiveCN102830243ASports effectsMeasuring equipment is simpleLinear/angular speed measurementIndication/recording movementRotation velocityMeasuring equipment
The invention discloses a method and a device for measuring rotation speed of a moving ball. According to the method provided by the invention, an equation or an equation set is constructed by using maximum micro Doppler frequency shift of reflection wave to calculate the rotation speed of the ball body; and the position and the movement speed of the ball body in movement can also be calculated, and data of related movement positions including height over a net of the ball body and a point of fall and data of speed are acquired by using arrival moment and the Doppler frequency shift of the reflection wave. The device comprises an emitter, one or more receivers, output equipment and a central processor. The measuring equipment is simple, and normal movement of the ball body is not affected; and an algorithm is low in complexity and convenient to quickly realize. The device provided by the invention is adopted for measurement; the measurement result is accurate; and the functions are complete.
Owner:成都定为电子技术有限公司
Composite insulator rod core ageing evaluation method
InactiveCN107885921ACharacterize the degree of agingMeasuring equipment is simpleMaterial analysis by optical meansDesign optimisation/simulationSupport vector machineComposite insulators
The invention relates to a composite insulator rod core ageing evaluation method especially suitable for 110KV-voltage-class insulators. The composite insulator rod core ageing evaluation method is characterized in that infrared spectroscopic analysis is conducted on a composite insulator rod core to extract the height of the main absorbing peak of a composite insulator, a support vector machine is utilized to evaluate the ageing degree of the composite insulator rod core; for the infrared spectroscopic analysis, the composite insulator rod core needs to be made into a test sample having the thickness of 1.5 mm, the main absorbing peak contains a hydroxy group (-OH), an alkyl group (-CH3) and a carbanyl group (-C=O), the establishment of the support vector machine needs an evaluation modelfor a fixed model of composite insulator rod cores, and then model parameters are utilized to evaluate the composite insulator rod cores of the model. The composite insulator rod core ageing evaluation method can conduct classification and state assessment on composite insulators in different ageing states and guide operating maintenance workers to maintain the composite insulators.
Owner:STATE GRID CORP OF CHINA +1
Object gravity center detecting method suitable for automatic grabbing of manipulator
ActiveCN108818586ASolve the problem that it is difficult to detect the center of gravityMeasuring equipment is simpleGripping headsComputing MethodologiesGravity center
The invention discloses an object gravity center detecting method suitable for automatic grabbing of a manipulator. The object gravity center detecting method comprises the steps that 1, relevant parameters required by object gravity center position detecting are obtained in advance; 2, a grabbed object is subjected to two-time grabbing operation, and combined with the relevant parameters obtainedin advance, four possible gravity center coordinate values of the grabbed object are calculated and obtained correspondingly; and 3, the obtained four possible gravity center coordinate values are calculated, and the unique gravity center coordinate is determined from the obtained four possible gravity center coordinate values. According to the object gravity center calculating method, the manipulator is used for grabbing the object for two times, thus the gravity center position of the object can be easily and effectively detected and obtained, influences of the shape and mass distribution of the object are avoided, the implementation structure is simple, needed sensors are fewer, and the object gravity center detecting method has large practical value in domestic service robots and industrial robots.
Owner:SHANDONG UNIV
Rice stalk lodging resistance measuring device
ActiveCN108760503AEasy to lodging strengthMeasuring equipment is simpleMaterial strength using tensile/compressive forcesInfrared emitterMechanical engineering
The invention provides a rice stalk lodging resistance measuring device, relates to the technical field that materials are tested or analyzed by testing physical properties, and aims to solve the technical problem that multiple indexes of rice stalk cannot be measured in a field. The device comprises a first clamping part, a second clamping part, a tray, a rotating body and a measuring box, wherein a holding part for holding rice stalk is arranged on the first clamping part; an inclination angle sensor and an infrared emitter are respectively correspondingly mounted on both sides of the holding part; the second clamping part is provided with a moveable baffle block which is propped against the rice stalk; the infrared emitter is arranged opposite to one side of the baffle block; both the first clamping part and the second clamping part are rotationally connected with the tray; a pull rod is mounted at an end part of the measuring box; the pull rod is detachably connected with a rotating body; a tension sensor and a tension angle sensor are mounted on the pull rod; the tray is held by hand to rotate the first clamping part and the second clamping part; the outer diameter of the ricestalk is measured by the infrared emitter; the rotating body is rotated, and tension in different angles of the rice stalk can be measured by the pull rod.
Owner:黑龙江省农业科学院佳木斯水稻研究所
Organic coating diffusion coefficient testing device and testing method based on device
ActiveCN106501130ATest Diffusion RateReliable measurement dataDiffusion analysisElectrical resistance and conductanceHigh resistance
The invention discloses an organic coating diffusion coefficient testing device which comprises a macromolecule box, wherein a pair of small holes are symmetrically formed in the upper parts of two sides of the macromolecule box; an electrode A and an electrode B are respectively inserted into every two opposite small holes; and the electrode A and the electrode B are connected with a high-resistance meter through leads. The invention further discloses a testing method based on the organic coating diffusion coefficient testing device. The testing method comprises the following steps: firstly, adding an organic coating to be tested into the small holes in the macromolecule box, inserting the electrode A and the electrode B, continuously supplementing the organic coating till the macromolecule box is full of the organic coating, cutting the organic coating to be tested into an organic coated layer, putting the macromolecule box filled with the organic coated layer into a medium to be tested, testing the resistance between the electrode A and the electrode B by using the high-resistance meter every 12 hours, ending the testing when the resistance is steady, and furthermore calculating the water absorption capacity of the medium, thereby obtaining a diffusion coefficient D. By adopting the organic coating diffusion coefficient testing device and the testing method, the problems in the prior art that a testing device is large in testing error and inaccurate in testing can be solved.
Owner:XIAN UNIV OF TECH
Self-recording type measurement device for ice content of frozen soil
ActiveCN105092824AImprove performanceCapable of self-protectionEarth material testingMeasurement deviceSolar cell
The invention relates to a self-recording type measurement device for the ice content of frozen soil. After factors for causing temperature state changes of the frozen soil are eliminated, the temperature of the frozen soil is recovered to a previous stable state under the influences of local natural conditions; by using the property, the frozen soil with the unit volume is heated to be melted; and the soil humidity before and after the frozen soil is melted is measured so that the ice content of the frozen soil with the unit volume is indirectly estimated. A soil temperature and humidity sensor is fitted with a temperature sensor and is mounted at geometrical center formed by four electric heating nets coated with high-temperature-resisting insulating materials; and the connection and disconnection of the electric heating nets and a power supply are controlled through a temperature sensor switching circuit. The storage battery is mounted in a heat insulation box and is connected with a solar charging controller to be connected with a solar cell panel to form a power supply system. The self-recording type measurement device has relatively low cost, can be operated stably and reliably, has a simple structure principle, and is suitable for long-time automatic detection of the ice content of the wild frozen soil.
Owner:NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
Small current measurement method for resistivity of large size graphite electrode
InactiveCN106443190AEasy to measureGood effectResistance/reactance/impedenceMeasurement devicePhysics
The invention provides a small current measurement method for the resistivity of a large size graphite electrode. The method is characterized in that the method comprises the steps that 40 to 100 A direct current output by a constant direct current source is applied to both ends of the measured graphite electrode; the reading of the current value is measured and conversed by a shunt; the voltage of the graphite electrode is measured, and the current is measured by two contact probes which impact the cylinder surface of the graphite electrode and are distributed at a certain distance through voltage drop generated by the graphite electrode; two millivolts signals representing the current and voltage are sent to a calculation display meter; calculation is carried out according to a resistivity calculation formula; and the resistivity of the measured graphite electrode is directly displayed. The current density interval is between 0.02A / cm<2> to 0.1A / cm<2>. The distance between two contact probes which are distributed at a certain distance on the cylinder surface of the graphite electrode is from 400mm to 3 / 4 of the graphite electrode length. The small current measurement method has the advantages of being scientific and reasonable, simple measurement device, convenient measurement, low cost, good effect and so on.
Owner:JILIN CARBON
Light choppers
ActiveCN101261362AMeasuring equipment is simpleHigh measurement accuracyNon-linear opticsOptical elementsPolarizerMeasuring equipment
The invention relates to an optical chopper, which comprises a motor, a modulation reticle arranged on a rotating shaft of the motor and a polarizer arranged at the terminal of the rotating shaft of the motor; the rotating shaft is provided with an axial through hole. The optical chopper has the advantages that, the modulation reticle and the polarizer fixed on the rotating shaft of the motor respectively and simultaneously performs mechanical modulation to reference light and measurement light, therefore, measuring equipment is greatly simplified, and measuring accuracy and convenience are improved.
Owner:SHENZHEN KECHUANG DIGITAL DISPLAY TECH
Linear structure light fitting plane-based robot repeated positioning accuracy measurement method
ActiveCN110864671AMeasuring equipment is simpleStrong real-timePicture taking arrangementsPhoto irradiationClassical mechanics
The invention relates to a linear structure light fitting plane-based robot repeated positioning accuracy measurement method. The method comprises the steps of irradiating an upper surface of a planarcooperation target with two rays of horizontal linear structure light, and extracting image coordinate; converting linear structure light image coordinate to camera system coordinate according to a geometrical relation between a camera coordinate system and an image coordinate system, performing planar fitting, and determining a position of the upper surface of the cooperation target under the camera coordinate system; calculating a normal of the fitting plane, setting the normal as a z axis of a model coordinate system, and setting a linear structure light direction of the fitting plane as an x axis of the model coordinate system, wherein the z axis is crossed with the x axis to from a y axis of the model coordinate system; forming a cross light region on the upper surface of the planarcooperation target, wherein a cross point is an origin point of the model coordinate system; and determining a rotation matrix and a translation vector according to a geometrical relation between thecamera coordinate system and the model coordinate system. By the method, on-line, real-time, automatic and non-contact measurement of robot repeated positioning accuracy can be achieved, and the method is rapid in measurement speed and good in system flexibility.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Electromagnetic torque change based method for nondestructive detection of defect in conductor
ActiveCN102818838ASimple measurement conditionsSimplify process costsMaterial magnetic variablesMeasurement costSemiconductor materials
The invention relates to an electromagnetic torque change based method for nondestructive detection of defects in a conductor, and belongs to the technical fields of power, electronic industry, metallurgical industry, semiconductor material and oil energy. This method is as below: first a torque sensor is set at one side of a cylindrical permanent magnet to drive the cylindrical permanent magnet to rotate, and conductors having no defects approach the rotating cylindrical permanent magnet, so as to measure a reference curve of change of rotating angular velocity of the cylindrical permanent magnet with time; and then a plurality of calibration curves of change of rotating angular velocity of permanent magnet with defects with time are measured; the permanent magnet approaches the conductor to be measured, so as to obtain a measurement curve; and the measurement curve is compared with the calibration curves, so as to obtain defect size of the conductor to be measured. The method is suitable for conductors such as wire, tubing and sheet metal; and the conductor to be measured does not need to move, thereby simplifying measurement conditions, measurement process, measurement cost and measurement equipment; besides, the method can easily realize automation and miniaturization, and can be applied to more fields and environment.
Owner:GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
Method for measuring surface roughness based on wavelet Brownian motion texture fusion model
ActiveCN110543698AGuaranteed accuracyGuarantee stabilityCharacter and pattern recognitionSpecial data processing applicationsMathematical modelWavelet decomposition
The invention belongs to the technical field of surface roughness detection, and particularly relates to a method for measuring surface roughness based on a wavelet Brownian motion texture fusion model, which comprises the following steps: (1) acquiring a laser speckle image; (2) determining an optimal wavelet basis function; (3) determining an optimal wavelet decomposition layer number; (4) carrying out two-dimensional wavelet decomposition on the obtained laser speckle image; (5) performing modeling analysis by using a wavelet Brownian motion texture fusion method to obtain a mathematical model; and (6) substituting the surface texture characteristic parameters of the to-be-measured workpiece into the mathematical model obtained in the step (5), and calculating to obtain the surface roughness of the to-be-measured workpiece. According to the method, a mathematical model between laser speckle image texture characteristic parameters and characterization surface roughness parameters isestablished by using a wavelet and Brownian motion texture fusion method in the aspects of practice and theory, so that the surface roughness of the to-be-measured workpiece can be measured in an online, rapid and non-contact manner through a single laser speckle image.
Owner:HEFEI UNIV OF TECH
Engine cylinder cover water chamber flow field visualization test method
InactiveCN102538697AMeasuring equipment is simpleEasy to implementHydrodynamic testingUsing optical meansMetal cylinderFluid field
Owner:CHINA NORTH IND GRP NO 70 RES INST
Stereoscopic vision high-precision measurement method based on cloud computing, and storage medium
InactiveCN110579169AMeasuring equipment is simpleUsing optical meansSatellite radio beaconingMeasurement pointThree-dimensional space
The invention discloses a stereoscopic vision high-precision measurement method based on cloud computing, and a storage medium. The stereoscopic vision high-precision measurement method comprises thesteps of: shooting at least three pieces of digital image data containing a certain point to be measured by means of a camera and acquiring GNSS data of coordinates of the camera when the camera is shooting the point to be measured; calculating to obtain attitude and position data of the digital image data based on the digital image data and the GNSS data; and acquiring three-dimensional coordinates of the point to be measured based on the attitude and position data. The stereoscopic vision high-precision measurement method obtains the attitude and position data of the digital image data through acquiring the digital image data containing the point to be measured and GPS data, obtains the real three-dimensional space coordinates of the point to be measured through bundle adjustment based on the attitude and position data, expands the application range of the camera, adopts simple measuring equipment, and can also measure the point to be measured under the shielding condition.
Owner:GUANGZHOU SOUTH SATELLITE NAVIGATION INSTR
Aircraft lateral parallel centroid control method based on overload control
ActiveCN112230540AMeasuring equipment is simpleSimple control methodControllers with particular characteristicsAttitude controlFlight vehicleOverload control
The invention relates to an aircraft lateral parallel centroid control method based on overload control. Lateral acceleration, speed and position signals of the aircraft are measured by installing a KY-INS300 optical fiber integrated navigation system. On one hand, an overload signal is obtained by converting an acceleration signal, then nonlinear lag correction and proportional integral are carried out, and an overload comprehensive signal based on a lateral overload error rather than a lateral overload error is obtained and directly transmitted to a yawing rudder system. On the other hand, alateral position error signal is obtained by comparing the lateral position signal with an expected position instruction signal, and then nonlinear advanced correction and nonlinear integration are carried out to obtain a position error comprehensive signal which is directly transmitted to an aircraft yaw rudder system. Through the overload and position error parallel control method, the lateralcentroid control of the aircraft has good rapidity and good damping characteristics due to the introduction of overload signals, and has the advantages of simple scheme and simple measurement.
Owner:NAVAL AVIATION UNIV +1
Test method of double shield TBM tunneling tunnel surrounding rock rebound value
ActiveCN109441470AEasy to measureMeasuring equipment is simpleMining devicesUnderground chambersGeomorphologyMeasuring equipment
The invention discloses a test method of double shield TBM tunneling tunnel surrounding rock rebound value, and belongs to the technical field of TBM tunnel construction. The invention provides a novel test method aiming at double shield TBM tunnel surrounding rock rebound value. The test method utilizes reserved backfill holes of duct pieces in the process of double shield TBM tunneling. After the corresponding duct pieces are installed and a tail shield is removed, and within the time slot before hydraulic fill and grouting, rebound values K of rock mass on the bottoms of the backfill holesare measured through a rebound apparatus and corresponding extension rods, and whether the surrounding rocks near the corresponding backfill holes are stable determined by the measured rebound valuesK. The test method of double shield TBM tunneling tunnel surrounding rock rebound value has the advantages of convenient measurement, simple measuring equipments, visualized and precise measuring results, and the machine does not need to be stopped in the measurement process and tunnel tunneling construction cannot be subjected to a large effect, and thus the test method can be widely popularizedand used.
Owner:CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
A device for measuring the lodging resistance strength of rice stems
ActiveCN108760503BEasy to lodging strengthMeasuring equipment is simpleMaterial strength using tensile/compressive forcesEngineeringMechanical engineering
The invention provides a rice stalk lodging resistance measuring device, relates to the technical field that materials are tested or analyzed by testing physical properties, and aims to solve the technical problem that multiple indexes of rice stalk cannot be measured in a field. The device comprises a first clamping part, a second clamping part, a tray, a rotating body and a measuring box, wherein a holding part for holding rice stalk is arranged on the first clamping part; an inclination angle sensor and an infrared emitter are respectively correspondingly mounted on both sides of the holding part; the second clamping part is provided with a moveable baffle block which is propped against the rice stalk; the infrared emitter is arranged opposite to one side of the baffle block; both the first clamping part and the second clamping part are rotationally connected with the tray; a pull rod is mounted at an end part of the measuring box; the pull rod is detachably connected with a rotating body; a tension sensor and a tension angle sensor are mounted on the pull rod; the tray is held by hand to rotate the first clamping part and the second clamping part; the outer diameter of the ricestalk is measured by the infrared emitter; the rotating body is rotated, and tension in different angles of the rice stalk can be measured by the pull rod.
Owner:黑龙江省农业科学院佳木斯水稻研究所
Optical fiber transmission type passive pressure sensor based on gradient refractive index lens
ActiveCN114397058AReal-time acquisitionEasy to installFluid pressure measurement by optical meansPlane mirrorRefractive index
The invention provides an optical fiber transmission type passive pressure sensor based on a gradient refractive index lens. The problems that an existing pressure measuring device is complex in structure, large in overall size and low in measuring precision are mainly solved. The pressure sensor comprises a displacement sensing module, a C-shaped spring tube, a rotating module, a light source, an optical fiber circulator, a photoelectric conversion module and a data processing module, the displacement sensing module comprises a base, a reflecting mirror seat, a guide rail, a sliding block, a plane reflecting mirror, a lens mounting seat, a micro lens and an optical fiber; the rotating module is used for converting the deformation amount of the C-shaped bourdon tube into the displacement amount of the plane mirror on the guide rail; a light beam emitted by the light source enters the micro lens through the optical fiber circulator and the optical fiber, is transmitted to the plane mirror after passing through the micro lens and enters the optical fiber circulator again through the micro lens after being reflected by the plane mirror, and the optical fiber circulator transmits the reflected light beam to the photoelectric conversion module. The data processing module converts the optical power into a corresponding distance.
Owner:XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Electromagnetic torque change based method for nondestructive detection of defect in conductor
ActiveCN102818838BSimple measurement conditionsMeasuring equipment is simpleMaterial magnetic variablesMeasurement costSemiconductor materials
The invention relates to an electromagnetic torque change based method for nondestructive detection of defects in a conductor, and belongs to the technical fields of power, electronic industry, metallurgical industry, semiconductor material and oil energy. This method is as below: first a torque sensor is set at one side of a cylindrical permanent magnet to drive the cylindrical permanent magnet to rotate, and conductors having no defects approach the rotating cylindrical permanent magnet, so as to measure a reference curve of change of rotating angular velocity of the cylindrical permanent magnet with time; and then a plurality of calibration curves of change of rotating angular velocity of permanent magnet with defects with time are measured; the permanent magnet approaches the conductor to be measured, so as to obtain a measurement curve; and the measurement curve is compared with the calibration curves, so as to obtain defect size of the conductor to be measured. The method is suitable for conductors such as wire, tubing and sheet metal; and the conductor to be measured does not need to move, thereby simplifying measurement conditions, measurement process, measurement cost and measurement equipment; besides, the method can easily realize automation and miniaturization, and can be applied to more fields and environment.
Owner:GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
Handheld device with measuring function and measuring method thereof
ActiveCN101907660BMeasuring equipment is simpleSpectral/fourier analysisResistance/reactance/impedenceComputer moduleLoudspeaker
The invention relates to a handheld device with a measuring function, which comprises a mobile communication device and a measuring device for measuring objects to be measured and acquiring a measuring signal, wherein the measuring device comprises a measuring plug and a measuring element electrically connected with the measuring plug; the mobile communication device comprises a signal socket, a data processing module and a central processing module; a signal plug is switched in the data processing module through the signal socket; and the data processing module is switched in the central processing module. The handheld device of the invention can measure an electrical signal of the objects to be measured and display a measuring result on a display screen of the mobile communication device or broadcast the result by a loudspeaker, thus being simple and feasible and conveniently used.
Owner:BEIJING ZHIGU TECH SERVICE
A device for testing the diffusion coefficient of an organic coating and a test method based on the device
ActiveCN106501130BTest Diffusion RateReliable measurement dataDiffusion analysisHigh resistanceElectrical resistance and conductance
The invention discloses an organic coating diffusion coefficient testing device which comprises a macromolecule box, wherein a pair of small holes are symmetrically formed in the upper parts of two sides of the macromolecule box; an electrode A and an electrode B are respectively inserted into every two opposite small holes; and the electrode A and the electrode B are connected with a high-resistance meter through leads. The invention further discloses a testing method based on the organic coating diffusion coefficient testing device. The testing method comprises the following steps: firstly, adding an organic coating to be tested into the small holes in the macromolecule box, inserting the electrode A and the electrode B, continuously supplementing the organic coating till the macromolecule box is full of the organic coating, cutting the organic coating to be tested into an organic coated layer, putting the macromolecule box filled with the organic coated layer into a medium to be tested, testing the resistance between the electrode A and the electrode B by using the high-resistance meter every 12 hours, ending the testing when the resistance is steady, and furthermore calculating the water absorption capacity of the medium, thereby obtaining a diffusion coefficient D. By adopting the organic coating diffusion coefficient testing device and the testing method, the problems in the prior art that a testing device is large in testing error and inaccurate in testing can be solved.
Owner:XIAN UNIV OF TECH
Wheel tread measuring device
InactiveCN112238879AEasy to measureMeasuring equipment is simpleWheel-rims surveying/measuringControl theoryMechanical engineering
The invention discloses a wheel tread measuring device, and the device comprises a connecting part which is suitable for being installed on a wheel; and a displacement detection device which is connected with the connecting part and is suitable for obtaining the distance between the preset position on the surface of the wheel and the displacement detection device. According to the arrangement, when the wheel tread is measured, the displacement detection device is directly installed on the wheel through the connecting part, and then the displacement detection device is manually controlled to conduct measurement in the axial direction of the wheel. Therefore, the measurement process is simplified, and the measurement equipment is simplified. Moreover, the wheel tread measuring device in theembodiment of the invention only comprises the driving device and the displacement detection device, so that the occupied area is reduced.
Owner:CHINA HUADIAN ENG +1
A six-axis industrial robot j2 joint and j3 joint stiffness measurement method
ActiveCN112936339BLower requirementEasy to testManipulatorExperimental testingPhysical medicine and rehabilitation
The invention relates to a method for measuring the stiffness of J2 joints and J3 joints of a six-axis industrial robot, comprising the following steps: calculating the end load of the robot under test; adjusting the robot to a designated posture; shielding the joint under test of the robot while maintaining the robot In the servo-on state; install the robot load to meet the torque required to test the stiffness of the joints, and fix the dial indicator on the robot; Fit with the end of the hexagon socket head screw; start the robot and apply different torques to the tested joint, and record the dial indicator value; draw a hysteresis curve according to the recorded dial indicator value and the torque applied to the tested joint to calculate joint stiffness and hysteresis loss. The joint stiffness of the industrial robot can be quantitatively obtained without disassembling the machine, the test process is convenient, and the requirements for experimental testers are low. At the same time, the measurement equipment is simple, the cost is low, and the test efficiency is high.
Owner:EFORT INTELLIGENT EQUIP CO LTD
Measurement device for tangent circle diameter of fuel nozzle of power station boiler and measurement method thereof
The invention discloses a measurement device for the tangent circle diameter of the fuel nozzle of a power station boiler and a measurement method thereof. The measuring device mainly comprises a rectangular steel plate, an infrared generator and a level gauge, wherein clamping grooves are processed on the longitudinal center line and bottom left position of the rectangular steel plate and used for the fixed installation of the infrared generator and the level gauge. According to the invention, a target distance can be accurately measured by utilizing the characteristics of infrared visibility and good positioning, and the theoretical tangent circle diameter can be obtained through simpler geometric calculation. The measurement method disclosed by the invention has the advantages of simple device, few measurement parameter and high accuracy. At present, the device and the calculation method are already successfully applied to the measurement of the theoretical tangent circle in the boilers of generator sets of multiple thermal power companies, and the accuracy and the reliability of measurement data are proved through an operating data result.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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