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30results about How to "High accuracy of measurement data" patented technology
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High-temperature-condition sound field measurement and analysis device and analysis method thereof
ActiveCN103438990AImprove reconstruction accuracyEliminate spatial aliasing effectsSubsonic/sonic/ultrasonic wave measurementTime domainData acquisition
The invention discloses a high-temperature-condition sound field measurement and analysis device and an analysis method thereof. The device comprises a sound guide tube array, a flexible semi-infinite tube, a sound sensor, a data collector and a computer. Through the combination design of the sound guide tubes and the semi-infinite tube, the tail end reflection of the guide tube can be restrained, and the measurement accuracy can be enhanced. The device can conduct sound field data acquisition and processing, and can realize the time domain, frequency domain and reconstruction analysis of a sound field. In the data processing process, data at the tail end of the sound guide tube can be corrected by utilizing a method of correcting the sound pressure amplitude value of the one-third octave band-based sound guide tube, and the measurement accuracy can be enhanced; the optimization of a conventional beam-formed sound field reconstruction method can be realized through kurtosis weighing computation, and accurate sound pressure distribution and strength information can be obtained. The high-temperature-condition sound field measurement and analysis device and the analysis method thereof have the advantages of being capable of conducting the sound field measurement under severe environments in which the conventional microphone can not directly conduct measurement, accurately reconstructing the distribution and strength information of the sound field at a high-temperature environment, and providing a data support for the fatigue invalidation analysis of materials / members under thermal sound coupling environments.
Owner:UNIV OF SCI & TECH BEIJING
Power transmission line monitoring device metering system and method in field environment
ActiveCN106404160AHigh accuracy of measurement dataImprove reliabilitySubsonic/sonic/ultrasonic wave measurementVibration controlQuality control
The invention discloses a power transmission line monitoring device metering system in a field environment. The system includes an excitation module, a vibration test module, a test interface module and a vibration control instrument; the excitation module is used for providing a vibration source for an on-line monitoring device; the vibration test module is used for detecting parameters of vibration of the on-line monitoring device excited by the vibration source; and the test interface transmits measured data to the vibration control instrument for data processing. The power transmission line monitoring device metering system in the field environment provided by the invention can enhance quality control of power transmission line breeze vibration on-line monitoring device in a lab environment, pushes reliable and effective development of state maintenance, improves a capability of technical control of state maintenance measurement equipment, enhances supervision of accuracy and reliability of the measured data of the power transmission line breeze vibration on-line monitoring device, effectively improves accident pre-judging and troubleshooting capability, and improves the safety production level and maintenance work efficiency.
Owner:STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
Method for determining a track of a geographical trajectory
ActiveUS7623961B2High accuracy of measurement dataImprove accuracySurveyNavigation by speed/acceleration measurementsComputer scienceCollections data
A method for determining a track of a geographical trajectory which has predetermined start and locations. A data collection device, which has onboard synchronized sensors, is moved between the start and end locations, and physical measurement data such as pitch, heading, roll and distance, is obtained and stored. Thereafter, the stored data is retrieved and mapped to determine error compensation. The physical measurement data, after error compensation, is used to determine the pitch profile, heading profile, distance profile and roll profile to ascertain the geographical trajectory track.
Owner:REDUCT +1
Device for testing tensile strength of protective film
InactiveCN107063863AStrong data continuityHigh accuracy of measurement dataMaterial strength using tensile/compressive forcesTectorial membraneElectric machine
The invention discloses a device for testing tensile strength of a protective film. The device comprises a treatment device, two parallel opposite equal-length brackets, a tension meter, a servo motor and a winch, wherein the winch is connected with the servo motor; the tension meter and the servo motor are connected with the treatment device; two opposite clamping devices are vertically arranged between the two brackets, one clamping device is fixedly arranged at one end of the corresponding bracket, and the other clamping device is connected with the two brackets through slide rails; the servo motor and the winch are arranged at one end, without the clamping device, of the corresponding bracket; the winch is connected with the movable clamping device through a pull rope and the tension meter; the protective film is fixedly arranged between the two clamping devices, the servo motor is started by the treatment device, and the treatment device is used for recording the working state of the servo motor and the tension condition of the tension meter. The device has the advantages that by adopting the servo motor, the accuracy of the measuring data is higher, and the data continuity is strong; by adopting the spring buffer structure, the detection of the protective film with lower ductility is realized.
Owner:CHENGDU HUIJIA ADHESIVE PROD CO LTD
Device and method for evaluating rheological properties of carbon dioxide dry-method fracturing fluid
ActiveCN107063931ASimple structureEasy to operateFlow propertiesOther gas emission reduction technologiesFracturing fluidEngineering
The invention provides a device and a method for evaluating rheological properties of a carbon dioxide dry-method fracturing fluid. The method comprises a carbon dioxide pressurization system, a tackifying agent injection system, a vacuum pump and a rotational rheometer and further comprises a six-way valve, wherein four valve ports of the six-way valve are connected with the carbon dioxide pressurization system, the tackifying agent injection system, the vacuum pump and the rotational rheometer through pipelines, the other two valve ports are connected with a pressure meter and an emptying valve through pipelines respectively, and the rotational rheometer is further connected with an air compressor, a computer and a temperature controller. The device is simple in structure and high in automation degree and adopts a simple operation method, measurement of parameters of the rheological properties of the carbon dioxide dry-method fracturing fluid in different experiments under higher pressure and in the wider temperature range is realized, the accuracy of measured data is high and data are reliable. Accurate rheological data and curves acquired with the device and the method facilitate further research of the rheological law, and theoretical data are provided for carbon dioxide dry-method fracturing design and construction.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Measuring and testing device and method for soil mass displacement field around loaded structure
ActiveCN110376063AEvenly loadedUniform controlMaterial strength using tensile/compressive forcesMaterial strength using steady shearing forcesSoil massStress sensor
The invention discloses a measuring and testing device and a measuring and testing method for a soil mass displacement field around a loaded structure. The measuring and testing device and the measuring and testing method solve the problem of discontinuous displacement application in the prior art, and have the beneficial effects that the measurement precision is high and the model can realize repeated use. The measuring and testing device is characterized in that: the measuring and testing device for the soil mass displacement field around the loaded structure comprises a bracket, a plane strain model tank, a loading mechanism and a recording mechanism, wherein the plane strain model tank supported by means of the bracket, at least one side surface of the plane strain model tank is transparent, the plane strain model tank is filled with a filler, structures are embedded inside the filler, the structures are connected with one end of a connecting rod; the loading mechanism is supportedby means of the bracket, the loading mechanism comprises a lifting component capable of realizing up and down lifting motion, a stress sensor is arranged between the lifting component and the other end of the connecting rod, and a displacement sensor is supported by means of the fixed bracket; and the recording mechanism is arranged on at least one side of the plane strain model tank for recording the displacement changes of the filler in the plane strain model tank.
Owner:SHANDONG HUAJIAN ENG TESTING CO LTD
Three-component marine gravity and magnetic duplex measurement device
PendingCN108445547AHigh accuracy of measurement dataGood accuracyElectric/magnetic detectionGravitational wave measurementDigital conversionMeasurement device
The present invention discloses a three-component marine gravity and magnetic duplex measurement device. The device comprises a three-component marine gravity and magnetometer and a stable platform located at the bottom portion of the three-component marine gravity and magnetometer, and the bottom portion of the stable platform is provided with a power balance device; the three-component marine gravity and magnetometer comprises an analog-digital conversion circuit and a data storage circuit located at the upper portion of the internal portion of the three-component marine gravity and magnetometer, a three-component gravity sensor located at the middle portion of the internal portion of the three-component marine gravity and magnetometer, a three-component attitude sensor located below thethree-component gravity sensor and a three-component magnetic sensor located at the bottom portion of the internal portion of the three-component marine gravity and magnetometer, the top portion of the external portion of the three-component marine gravity and magnetometer is provided with a data display unit and a signal indication device, and the stable platform is provided with a temperature and salinity finder. The measurement device can perform synchronous collection of three-component marine gravity and magnetic duplex data, is high in measurement data precision and good in accuracy, and can provide more accurate data support for later scientific research.
Owner:山东蓝海可燃冰勘探开发研究院有限公司 +1
Cylinder deformation degree correcting equipment with synchronous detection and correction
InactiveCN106017282AReduce measurement errorHigh accuracy of measurement dataMechanical counters/curvatures measurementsOvalityMeasurement device
This application discloses a cylinder deformation correction device that can detect and correct simultaneously, including a conveying track, a lifting column, a coaxiality measuring device, an ellipticity correcting device, and a PLC; a detecting and correcting station is provided on the conveying track The coaxiality measurement device includes two arc blocks and at least two displacement sensors; the ellipticity correction device includes a telescopic cross bar, a positioning plug gauge, a correction head, a correction sleeve and a right sliding column; the positioning plug gauge can be extended into the correction Inside the cylinder of the oil cylinder on the station; the correction head is fixed on the left side of the right sliding column, the correction head is cylindrical and can rotate axially; the correction head is equipped with a correction sleeve, which is also cylindrical and It can rotate freely in the radial direction; the oil cylinder barrel at the correction station can be freely inserted into the correction sleeve. The application can automatically detect the degree of deformation of the oil cylinder barrel and automatically correct and detect the oil cylinder barrel with a deviation in the degree of deformation, greatly improving the product qualification rate and reducing production costs.
Owner:谷香梅
Body-sensing glove of finger joint curvature measurement
InactiveCN108345382AAccurate measurement positionHigh accuracy of measurement dataInput/output for user-computer interactionGraph readingDigital dataSomatosensory system
The invention discloses a body-sensing glove of finger joint curvature measurement. The glove includes miniature angle sensors, a signal conditioning circuit, an information processor, data buses, anexternal data wire and a glove body. The miniature angle sensors, the signal conditioning circuit and the information processor are all integrated on the glove body. The signal conditioning circuit isrespectively connected with the miniature angle sensors and the information processor. The data buses are formed by analog data buses and digital data buses. The glove can measure curvature of each joint of fingers, and thus identify subtle finger joint movement such as pressing a trigger and playing a stringed / keyboard instrument, and has the advantages of a simple structure, high measurement data precision, good user interaction experience feeling and the like.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Testing platform for simulating vegetation combustion particle charges in electric field of power transmission line
InactiveCN109444563AGuaranteed repeatabilityHigh accuracy of measurement dataElectrical measurementsMass measurementTransmission line
The invention belongs to the field of power transmission line prevention technology, and discloses a testing platform for simulating vegetation combustion particle charges in an electric field of a power transmission line. The testing platform for simulating the vegetation combustion particle charges in the electric field of the power transmission line comprises a vegetation combustion system, a simulated power transmission line voltage generating system, a particle collecting system, a charge measuring system, a mass measuring system, a signal acquisition system and a control platform. The platform of the invention can effectively simulate the vegetation combustion condition below the power transmission line, and furthermore performs vegetation combustion in a quantitative weighing mode,thereby ensuring test repeatability. The testing platform can perform real-time measurement on the particle charges at different positions for obtaining multilayer multidimensional measurement data, thereby facilitating analysis and researching for the particle charge process and particle charge amount of mountain fire particles below the power transmission line.
Owner:CHINA THREE GORGES UNIV
Cylinder coaxiality automatic detection machine with controllable compacting force
InactiveCN106017398AReduce measurement errorHigh accuracy of measurement dataMechanical measuring arrangementsEngineeringPressure sensor
The application discloses an automatic detection machine for cylinder coaxiality with controllable pressing force, which includes a detection table, a left fixed column, a right fixed column, two plug gauges, a reference plate, three displacement sensors, a PLC, two Arc-shaped pressure claws, pressure sensors and lifting displacement sensors; there is an arc-shaped reference groove on the detection table that can place the cylinder; each plug gauge can match the inner hole of the cylinder; the reference plate is set on the arc-shaped reference Directly above the groove, three displacement sensors are arranged on the bottom of the reference plate from left to right, and the top of each arc-shaped pressure jaw is fixedly connected with the reference plate through a lifting rod; the bottom of one of the arc-shaped pressure jaws is provided with a pressure sensor, wherein a lifting rod is provided with a lifting displacement sensor. In the detection process of this application, the displacement sensor is not in direct contact with the oil cylinder, the displacement sensor has a long service life, and will not scratch the surface of the oil cylinder, the detection accuracy is high, the detection rate is high, the detection is convenient, and it can automatically reading.
Owner:谷香梅
Abnormality detection apparatus for working tools
ActiveUS11400556B2Reduce in quantityRestrain memory capacityProgramme controlTesting/monitoring control systemsProcess engineeringMachining process
An abnormality detection apparatus for working tools configured to be used in a machining process performed by a machine tool, the abnormality detection apparatus includes a storage portion which previously stores correlations between features of a plurality of operating portions relation to the machining process performed by the machine tool, and a tool condition of each of a plurality of working tool types, and a tool condition determining portion which determines the tool condition of the working tools based on the correlations.
Owner:JTEKT CORP
Method for measuring hardness distribution of fastener
ActiveCN109507055AHigh accuracy of measurement dataSimple methodInvestigating material hardnessFastenerHardness
The invention provides a method for measuring hardness distribution of a fastener. The method comprises the following steps: streaking a sample by a blade with a streaking method; measuring three hardness points sequentially at equal intervals at the beginning end of streaking to serve as standard hardness and correspond to depths of corresponding streak parts, and obtaining the functional relation between Micro Vickers hardness and indentation depth according to data, namely, the indentation depth h obtained with the streaking method and known data including blade sharp corner eta and constant pressure F; enabling the relation to correspond to depth curve of streaks under program control of a controller to obtain the hardness distribution curve of a to-be-measured area. According to the method for measuring hardness distribution of the fastener, streaking is performed on the to-be-measured area, the hardness distribution condition of the measured area is calculated directly accordingto the functional relation between hardness and the indentation depth, and accuracy of measured data is high.
Owner:AEROSPACE PRECISION PROD INC LTD
Glass steel insulator measurement device
PendingCN107388965AHigh accuracy of measurement dataHigh precisionUsing optical meansApparatus for force/torque/work measurementMeasurement deviceAutomation
The present invention discloses a glass steel insulator measurement device. The device comprises a rack, the bottom portion of the rack is provided with a transmission device, the transmission device is connected with an insulator, and the transmission device drives the rotation of the insulator; the rack is provided with a pulling-out pull pin device and an infrared detection device, the infrared detection device is configured to detect the dimensional parameters of the insulator, and the pulling-out pull pin device is configured to perform measurement of pull pin tension of the insulator. The rack is provided with a clamping device, the clamping device is configured to fix the insulator, and protection plates with through holes are installed around the bottom of the rack. The glass steel insulator measurement device is simple in structure, convenient in manufacturing, low in manufacturing cost and precious and accurate in measurement data, and can realize automation and intelligence of the measurement process.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Testing device for semiconductor thermoelectric refrigerating unit
InactiveCN109884491AMany controllable parametersSimple structureIndividual semiconductor device testingElectricityLiquid medium
The invention belongs to the technical field of semiconductor thermoelectricity, and particularly relates to a testing device for a semiconductor thermoelectric refrigerating unit. The testing devicecomprises a main control module, a heat exchange module, a liquid medium pipeline module, an electricity supply module and a sensor module; the heat exchange module comprises a hot end exchanger and acold end exchanger, the hot end exchanger and the cold end exchanger are each provided with a liquid medium outlet and a liquid medium inlet, the liquid medium outlets and the liquid medium inlets are provided with temperature sensors correspondingly, the hot end exchanger and the cold end exchanger are provided with heat exchanging faces making contact with the cold end and the hot end of the semiconductor thermoelectric refrigerating unit, and heat-insulation layers are arranged on the outer surfaces, except for the outer surfaces of the heat exchanging faces and the liquid medium outlet and the liquid medium inlet, of the hot end exchanger and the cold end exchanger correspondingly; the liquid medium pipeline module is provided with a power pump controlled by the main control module; the electricity supply module comprises a direct-current electricity source controlled by the main control module; and the main control module is a computer. The testing device works through a water flow heat metering method, the heat exchange module in heat insulation with the exterior is adopted, thus heat emission in testing can be effectively prevented, and the measurement error can be effectively reduced.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Soil layer deformation testing device in natural gas hydrate horizontal well layered mining process
ActiveCN114000872AReasonable arrangementReduce mutual interferenceSurveyConstructionsHigh densityHorizontal wells
The invention discloses a soil layer deformation testing device in a natural gas hydrate horizontal well layered mining process, which can simulate the natural gas hydrate horizontal well layered mining process, and adopts a mode of cooperative acquisition of a high-density resistivity tomography method, a micro-seismic monitoring method, an optical fiber sensing testing method and a mechanical measurement method, soil layer deformation and stress data in the hydrate exploitation process are comprehensively measured and analyzed; meanwhile, the soil layer deformation obvious area is determined through numerical simulation, preliminary experiment development and other methods, various sensors and probes are reasonably pre-buried in the soil layer, and the experiment effects that the sensors are reasonably arranged, mutual interference is small, and the measurement data precision is high are achieved.
Owner:CHINA UNIV OF MINING & TECH
Abnormality detection apparatus for working tools
ActiveUS20200398398A1Reduce in quantityRestrain memory capacityProgramme controlTesting/monitoring control systemsProcess engineeringMachine
An abnormality detection apparatus for working tools configured to be used in a machining process performed by a machine tool, the abnormality detection apparatus includes a storage portion which previously stores correlations between features of a plurality of operating portions relation to the machining process performed by the machine tool, and a tool condition of each of a plurality of working tool types, and a tool condition determining portion which determines the tool condition of the working tools based on the correlations.
Owner:JTEKT CORP
A metering system and method for a transmission line monitoring device in an on-site environment
ActiveCN106404160BHigh accuracy of measurement dataImprove reliabilitySubsonic/sonic/ultrasonic wave measurementVibration controlQuality control
The invention discloses a power transmission line monitoring device metering system in a field environment. The system includes an excitation module, a vibration test module, a test interface module and a vibration control instrument; the excitation module is used for providing a vibration source for an on-line monitoring device; the vibration test module is used for detecting parameters of vibration of the on-line monitoring device excited by the vibration source; and the test interface transmits measured data to the vibration control instrument for data processing. The power transmission line monitoring device metering system in the field environment provided by the invention can enhance quality control of power transmission line breeze vibration on-line monitoring device in a lab environment, pushes reliable and effective development of state maintenance, improves a capability of technical control of state maintenance measurement equipment, enhances supervision of accuracy and reliability of the measured data of the power transmission line breeze vibration on-line monitoring device, effectively improves accident pre-judging and troubleshooting capability, and improves the safety production level and maintenance work efficiency.
Owner:STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
A device for measuring and analyzing sound field in a high-temperature environment and its analysis method
ActiveCN103438990BOvercome the difficulty of not being able to withstand high temperatureHigh accuracy of measurement dataSubsonic/sonic/ultrasonic wave measurementData acquisitionSound pressure
The invention relates to a sound field measuring and analyzing device and an analyzing method in a high temperature environment. The device consists of an acoustic catheter array, a flexible semi-infinite tube, an acoustic sensor, a data collector and a computer. The combined design of the acoustic tube and the semi-infinite tube can suppress the reflection at the end of the tube and improve the measurement accuracy. The device can collect and process sound field data, and realize sound field time domain, frequency domain and reconstruction analysis. In the process of data processing, the data at the end of the sound tube is corrected by using the sound pressure amplitude correction method based on the 1 / 3 octave spectrum to improve the measurement accuracy; the conventional beamforming sound field weighting is realized through the kurtosis weighted calculation. The structural method is optimized to obtain accurate sound pressure distribution and intensity information. The advantage is that it can perform sound field measurement in harsh environments that conventional microphones cannot directly measure, and can accurately reconstruct sound field distribution and intensity information in high temperature environments, providing data support for fatigue failure analysis of materials / components in thermoacoustic coupling environments.
Owner:UNIV OF SCI & TECH BEIJING
Mining telescopic measuring rod manufactured by transforming fishing pole
InactiveCN104534973ASmall sizeEasy to useMechanical solid deformation measurementsSteel platesTape measure
The invention provides a mining telescopic measuring rod manufactured by transforming a fishing pole. The measuring rod comprises a measuring tape (1), wherein the length measuring range of the measuring tape (1) is not less than 3m; the shell of the measuring tape (1) is fixed on a base (2); the cross section of the base (2) is of a U shape; the base (2) is made of a steel plate; a plug (3) is arranged at one end of the base (2), and a measuring tape guiding plate (4) is arranged at the other end of the base (2); the belt (6) of the measuring tape (1) can go in and out of the shell of the measuring tape (1) against the measuring tape guiding plate (4); the outer end of the belt (6) is fixedly connected with the extending end tip of a telescopic fishing pole (5) which is made of a non-conductive material. The invention aims to provide the mining telescopic measuring rod which is manufactured by transforming a fishing pole, is small in size and convenient to use, can be used for well guaranteeing staff safety, and is high in measuring data accuracy.
Owner:LONGKOU MINING GRP
3D projection scanning test device
PendingCN107255447AFast testHigh accuracy of measurement dataUsing optical meansControl systemComputer science
A 3D projection scanning test device disclosed by the present invention comprises a rack, a reference measurement platform, an X-axis mechanism, two parallel Y-axis mechanisms, a Z-axis mechanism and a 3D scanner. The reference measurement platform and the Y-axis mechanisms are both arranged on the rack, the X-axis mechanism is erected on the two parallel Y-axis mechanisms slidably, and the Z-axis mechanism is arranged on the X-axis mechanism slidably; the 3D scanner is arranged on the Z-axis mechanism and comprises a 3D scanning system, an industrial vision module and a lead screw, the lead screw is connected with the servo motor output end of the Z-axis mechanism, the 3D scanning system is connected with the lead screw, and the 3D scanning system and the industrial vision module correspond to the reference measurement platform. According to the present invention, a needed product is placed on the reference measurement platform, the device is started to enable the X-axis mechanism, the Y-axis mechanisms and the Z-axis mechanism to be in linkage, the 3D scanning system and the industrial vision module on the Z-axis mechanism measure the product, and the measured data is fed back to a control system and finally is exported.
Owner:广东秦泰盛智能化科技有限公司
An installation method of spot heat flow sensor for aerodynamic thermal test in wind tunnel
ActiveCN113639953BIs the installation valid?Effective installationGeometric CADAerodynamic testingThermodynamicsHeat flow
The invention discloses a method for installing a point heat flow sensor used in wind tunnel aerodynamic heat tests. This method establishes a numerical test model; calculates the heat flow value q0 of a typical area location point; sets the point type heat flow sensor installation point; sets the installation height error sequence of the point type heat flow sensor installation point; calculates the aerodynamic heat flow value sequence of the point type heat flow sensor installation point ; Calculate the relative deviation sequence between the aerodynamic heat flow value sequence of the point heat flow sensor installation point and the heat flow value q0; calculate the maximum error h0 of the installation height of the point heat flow sensor; check the height installation error of the point heat flow sensor of the physical test model, and determine the installation Whether it is qualified, and make rectification until the installation is qualified. This method can reduce the installation error of the point heat flow sensor and improve the measurement data accuracy of the wind tunnel aerothermal test.
Owner:中国空气动力研究与发展中心超高速空气动力研究所
Wireless energy supply high-precision signal processing module for wearable sweat sensor
ActiveCN113271116AHigh accuracy of measurement dataEasy to acceptCircuit arrangementsTransmissionSignal processing circuitsInterference (communication)
The invention discloses a wireless energy supply high-precision signal processing module for a wearable sweat sensor, which comprises a substrate, a sweat sensor, a radio frequency antenna, a communication circuit, a power supply circuit, a signal processing circuit and an ADC analog-to-digital converter, and is characterized in that the power supply circuit comprises a charge pump circuit, a virtual battery and a voltage stabilizing circuit; the signal processing circuit comprises a voltage following circuit, a programmable gain amplification circuit and a four-order low-pass filter circuit. The size of the gain can be conveniently adjusted through a program according to the size of an output signal of the sensor, and meanwhile, the module can reduce signal loss and well remove interference, so that the measurement data precision of the wearable sweat sensor is effectively improved, and a reader can receive data and analyze and process the data conveniently. Meanwhile, the virtual wireless power supply technology is adopted, so that the equipment does not need to be provided with a battery, the size of the equipment is greatly reduced, and a user can wear the equipment more conveniently.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Point type heat flow sensor installation method for wind tunnel aerodynamic heat test
ActiveCN113639953AReduce installation errorsHigh accuracy of measurement dataGeometric CADAerodynamic testingHeat flowFull scale test
The invention discloses a point type heat flow sensor installation method for a wind tunnel aerodynamic heat test. The method comprises: establishing a numerical test model; calculating a heat flow value q0 of the typical region position point; setting point type heat flow sensor mounting points; setting a mounting height error sequence of the mounting points of the point type heat flow sensor; calculating an aerodynamic heat flow value sequence of the point type heat flow sensor mounting points; calculating a relative deviation sequence of an aerodynamic heat flow value sequence and a heat flow value q0 of a point type heat flow sensor mounting point; calculating the maximum error h0 of the mounting height of the point type heat flow sensor; and checking the height installation error of the point type heat flow sensor of the physical test model, judging whether the installation is qualified or not, and performing rectification until the installation is qualified. The method can reduce the installation error of the point type heat flow sensor, and improves the measurement data precision of a wind tunnel aerodynamic heat test.
Owner:中国空气动力研究与发展中心超高速空气动力研究所
Air compressor system energy conservation tester
InactiveCN106401936ASimplify operating proceduresReduce wastePump testingPositive-displacement liquid enginesInformatizationMain processing unit
The invention relates to an air compressor system energy conservation tester which is resistant to interference, convenient to carry and intelligent. The tester has the most important characteristic of being convenient to carry, various real-time data and state diagrams of an air compressor are displayed, and the energy conservation performance is better. Existing detection data of air compressors are relatively singular, and informatization and intelligentization of real-time operation states and various indexes of the air compressors cannot be achieved; and meanwhile, since the environments are different, the anti-interference capacity is not available. According to the technical scheme, the air compressor system energy conservation tester is a portable box and comprises a power supply, an integrated data acquisition module, a main processing unit, a touch screen and a temperature controller which are connected, the integrated data acquisition module is used for acquiring external data simulation signals which are converted into digital signals through the main processing unit, the digital signals are displayed on the touch screen, and visual information and state diagrams are provided; and the air compressor system energy conservation tester is suitable for energy conservation testing of industrial or civil air compressor systems.
Owner:宇鑫绿色环保科技(南通)有限公司
Circuit for measuring temperature of to-be-detected article
InactiveCN110702254AHigh accuracy of measurement dataReduce mistakesThermometers using electric/magnetic elementsUsing electrical meansPhysicsPotentiometer
The invention discloses a circuit for measuring the temperature of a to-be-detected article. The circuit comprises resistors R1 to R13, an electrolytic capacitor C1, a capacitor C2, electrolytic capacitors C3 to C5, a capacitor C6, potentiometers RP1 to RP4, a voltage-stabilized diode D1, a chip U1, a chip U2 and a thermistor Rt. The circuit can measure the temperature of the to-be-detected article at any moment, and measured data is high in precision and small in error.
Owner:XUZHOU LIFANG MECHANICAL & ELECTRICAL EQUIP MFG CO LTD
A detection device for elevator no-load balance coefficient based on hydraulic cylinder straight top type
ActiveCN105692378BEasy to operateHigh accuracy of measurement dataElevatorsHydraulic cylinderEngineering
Owner:GUANGZHOU SPECIAL MECHANICAL & ELECTRICAL EQUIP INSPECTION & RES INST
A film thickness test method of pin-disc friction machine under oil lubrication condition
The invention discloses a membrane thickness testing method for a pin disc type friction machine under an oil lubrication condition, and belongs to the technical field of oil membrane thickness measurement and property evaluation. The membrane thickness testing method comprises the following basic steps: measuring reference data H0, namely, in an oil-free state, rotating a friction disc at a low speed, and confirming a measurement value H0 acquired by a displacement sensor in the process as the reference data; measuring experiment data HT, namely, adding lubricating oil, correspondingly controlling the load applied to an experiment pin and the rotation speed of the friction disc according to the requirements of experiment working conditions, and confirming the measurement value HT acquired by the displacement sensor in the process as experiment data; subtracting the data of H0 in a corresponding position of the friction disc from data of HT of the data group, and calculating to obtain the oil membrane thickness delta H in the corresponding position. By controlling testing parameters such as the applied load of the experiment pin, the rotation speed of the friction disc, and a lubricating medium, a material limit pv value can be measured, the relationship of component ineffectiveness and the pv value is obtained, the measurement data of the membrane thickness under the influence of different factors is obtained, and furthermore the mechanism-based research on friction abrasion is completed.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Shear nail anti-pulling test loading device used in cooperation with pressure testing machine
ActiveCN111595675AEasy loadingGuaranteed accuracyMaterial strength using tensile/compressive forcesClassical mechanicsEngineering
The invention discloses a shear nail anti-pulling test loading device used in cooperation with a pressure testing machine. The shear nail anti-pulling test loading device comprises a device body withthe hollow interior and a storage rack arranged in the device body. The storage rack comprises n supporting legs, n is larger than or equal to 3, and the upper portions of the adjacent supporting legsare connected through supporting columns to form an n-polygon structure. The outer sides of the storage rack supporting legs are in sliding contact with the inner wall of the device body; the lower ends of the storage rack supporting legs extend out of the hollowed-out bottom face of the device body; a concrete part is placed on the storage rack; one end of a shear nail is buried in the concrete,and the other end of the shear nail extends out of the bottom surface of the device body; external threads and high-strength bolts are arranged at one end, extending out of the bottom surface of thedevice body, of the shear nail; a loading head of the pressure testing machine is in contact with the upper end of the device body for loading pressure; the shear nail anti-pulling test loading deviceis simple in structure, reasonable in stress, clear in force transmission, capable of meeting the use requirements of all shear nail static anti-pulling tests, convenient and fast in loading and measuring process, high in measured data precision, free of calibration and capable of meeting the safety requirements at the same time.
Owner:WENZHOU DESIGN ASSEMBLY CO LTD +2
A test device and method for measuring the displacement field of soil around a loaded structure
ActiveCN110376063BEvenly loadedUniform controlMaterial strength using tensile/compressive forcesMaterial strength using steady shearing forcesSoil scienceSoil mass
The invention discloses a measuring and testing device and a measuring and testing method for a soil mass displacement field around a loaded structure. The measuring and testing device and the measuring and testing method solve the problem of discontinuous displacement application in the prior art, and have the beneficial effects that the measurement precision is high and the model can realize repeated use. The measuring and testing device is characterized in that: the measuring and testing device for the soil mass displacement field around the loaded structure comprises a bracket, a plane strain model tank, a loading mechanism and a recording mechanism, wherein the plane strain model tank supported by means of the bracket, at least one side surface of the plane strain model tank is transparent, the plane strain model tank is filled with a filler, structures are embedded inside the filler, the structures are connected with one end of a connecting rod; the loading mechanism is supportedby means of the bracket, the loading mechanism comprises a lifting component capable of realizing up and down lifting motion, a stress sensor is arranged between the lifting component and the other end of the connecting rod, and a displacement sensor is supported by means of the fixed bracket; and the recording mechanism is arranged on at least one side of the plane strain model tank for recording the displacement changes of the filler in the plane strain model tank.
Owner:SHANDONG HUAJIAN ENG TESTING CO LTD
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