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275results about How to "Avoid inaccurate measurements" patented technology
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Natural gas hydrate water discharge gas production exploitation device and exploitation method of natural gas hydrate water discharge gas production exploitation device
ActiveCN103410488ASpeed up decompositionReduce moisture contentConstructionsFluid removalElectricityVapor–liquid separator
The invention provides a natural gas hydrate water discharge gas production exploitation device and an exploitation method of the natural gas hydrate water discharge gas production exploitation device, and belongs to the technical field of natural gas hydrate exploitation. A feeding cavity (12) communicated with a natural gas hydrate layer (29) is connected with an in-well gas-liquid separator (7), an exhaust cavity (8) of the in-well gas-liquid separator (7) is communicated with a gas production sleeve pipe (17), and a water discharge opening of the in-well gas-liquid separator (7) is communicated with a liquid storage cavity (2) arranged at the lower part. According to the exploitation method adopting the device, the natural gas hydrate layer (29) is firstly heated, the in-well gas-liquid separator (7) is utilized for separating gas-water mixture generated in the natural gas hydrate decomposition process, meanwhile, a liquid level monitoring device is utilized for regulating the water discharge speed of an electric submersible pump (4), and the decomposition speed of the natural gas hydrate is controlled. The device and the method have the advantages that the natural gas hydrate exploitation well liquid accumulation can be effectively prevented, the gas production efficiency is improved, the work is safe and reliable, the environment is protected, the service life is long, and the like.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Calibration system and method of industrial robot workpiece coordinate system
InactiveCN107650144ASimplify the calibration processAvoid inaccurate measurementsManipulatorEngineeringRobot controller
The invention relates to a calibration system and method of an industrial robot workpiece coordinate system. The calibration system comprises an industrial robot, a robot controller, a robot ending tool, a sensor installation intermediate structural member, a calibration sensor assembly, a workpiece mounting table and a workpiece arranged on the workpiece mounting table. The calibration sensor assembly measures points on the workpiece, points on the characteristic curved boundary are detected, and a signal is output and then input into the robot controller; a trigger path is interrupted when the robot controller receives the signal, middle position data Fflange and displacement data Msensor in the height direction of a calibration sensor are recorded, and 6D data of the workpiece coordinate system is worked out by combining sensor mounting position data Fsensor. According to the calibration system and method of the industrial robot workpiece coordinate system, the calibration process is simple, the situation that measurement is not accurate due to the fact that a calibration plane is oblique can be avoided, the calibration precision is high, the calibration system can be applied tovarious workpiece occasions, the application cost of the calibration system is low, and achieving of large-range application and promotion is facilitated.
Owner:EFORT INTELLIGENT EQUIP CO LTD
Overlong workpiece linearity detection device driven by composite micro-feeding axis
The invention relates to an overlong workpiece linearity detection device driven by a composite micro-feeding axis. A guide rail is fixedly connected to an experiment table lathe bed; the guide rail is connected with a sliding table in a sliding and matching mode; four laser interferometers are arranged on a test table support which is arranged on one side of the guide rail; a drive device consisting of a vertical linear motor and a horizontal linear motor is arranged on the front end surface of the sliding table; reflecting mirrors are respectively arranged on the upper side, the lower side, the left side and the right side of a rotor of the vertical linear motor; the first to fourth laser interferometers are used for respectively reflecting laser beams sent by the first to fourth laser interferometers back to the corresponding laser interferometers through the first to fourth reflecting mirrors; a data control system receives data of the laser interferometers in two directions to acquire deviation directions and deviation amount of the linearity of the guide rail in the two directions; and the data control system transmits mobile signals to a driving unit which transmits pulse signals to the vertical linear motor and the horizontal linear motor, and thus the vertical linear motor and the horizontal linear motor move to correct linearity errors in the vertical and horizontal directions.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Optical fiber cantilever beam microphone for photoacoustic spectrum detection and manufacturing method
InactiveCN104865192AImplement detectionReduce the volume of the absorption cellColor/spectral properties measurementsLaser etchingIntrinsic safety
The invention relates to an optical fiber cantilever beam microphone for photoacoustic spectrum detection and a manufacturing method of the microphone. The optical fiber cantilever beam microphone comprises a single-mode optical fiber, an optical fiber ceramic sleeve, a polymer cantilever beam and an annular polymer film for detecting a photoacoustic spectrum signal. The manufacturing method includes the steps: firstly, machining the annular polymer film to form the polymer cantilever beam in a pulse laser etching mode; secondly, fixing the formed polymer cantilever beam and the optical fiber ceramic sleeve in a laser melt cladding mode; finally, forming stable FP (Fabry Perot) cavities in the end faces of the polymer cantilever beam and the single-mode optical fiber. The optical fiber cantilever beam microphone has the advantages of high integration level, small size, sensitivity in detection, intrinsic safety and the like.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Method and system for correcting air mass flow
ActiveCN108195591AAvoid inaccurate measurementsMass flow measurement devicesInternal-combustion engine testingOriginal equipment manufacturerDischarge measurements
The invention discloses a method for correcting air mass flow. The method includes: acquiring the air mass flow of the flow measuring pipeline of a target engine; searching for calibration mass flow,corresponding to the air mass flow, in a preset air compressor MAP; judging whether the difference ratio between the air mass flow and the calibration mass flow is larger than a preset different ratiothreshold or not; if so, determining a target calibration coefficient corresponding to the air mass flow and the calibration mass flow, and correcting the air mass flow according to the target calibration coefficient. When the method is used to perform correction at a certain time interval, the acquired air mass flow is corrected according to the preset air compressor MAP, and the problem that anexisting air mass flow measuring method is inaccurate in measuring due to the fact that a flow sensor is sensitive to pipelines and environments and the arrangement and use of the air inlet pipelinesin an automotive original equipment manufacturer generate measuring drifting.
Owner:WEICHAI POWER CO LTD +1
Continuous measurement and monitoring system for cantilever-method construction line font of linear bridge and monitoring method
PendingCN107289903ASimple structureEasy to useOptical rangefindersUsing optical meansContinuous measurementLaser ranging
The invention discloses a continuous measurement and monitoring system for a cantilever-method construction line font of a linear bridge. The system comprises reflecting drones, mounting upright pillars and a laser distance measurement devices. The invention further discloses a continuous monitoring method utilizing the continuous measurement and monitoring system. The continuous monitoring method comprises the following steps: (1) adjusting the positions of a first reflecting drone and a second reflecting drone by an operator; (2) measuring the actual offset of the second reflecting drone by virtue of a first laser distance measurement device; and (3) verifying a horizontal degree and rotation angle of the first laser distance measurement device by taking the actual position of the second reflecting drone as a basis, measuring the actual offsets of the first reflecting drone and a third reflecting drone by virtue of a second laser distance measurement device, and when a suspension basket is moved and is stopped after being moved in place, carrying out continuous monitoring on the offset of the suspension basket. The continuous measurement and monitoring system is simple in structure and convenient to measure, can be used for continuously measuring in a moving process of the suspension basket and is applicable to the suspended casting construction of most linear bridges.
Owner:ZHENGZHOU MUNICIPAL ENG CORP
High-precision blood sugar test paper with hematokrit measurement and compensation function
InactiveCN105973946AAvoid inaccurate measurementsImprove accuracyMaterial resistanceMaterial electrochemical variablesBiochemical engineeringBlood Glucose Measurement
The invention relates to a high-precision blood sugar test paper with a hematokrit measurement and compensation function. The high-precision blood sugar test paper comprises a substrate layer, the lower end of the substrate layer is provided with a first electrode, the lower end of the first electrode is provided with a corresponding second electrode, a work electrode is arranged between the first electrode and the second electrode, a communication electrode is arranged between the work electrode and the second electrode, the communication electrode is connected to the second electrode, the front end of the second electrode is provided with a covering layer, the rear end of the second electrode is provided with an upper partition sheet, the upper end of the covering layer is provided with an opening, a pore is arranged between the opening and a trigger electrode and an enzyme layer is arranged between the opening and the trigger electrode. Two reaction chambers are used and are filled with blood, hematokrit of the blood in one of the reaction chambers is measured by a conductivity method, a blood sugar concentration of the blood in the other of the reaction chambers is measured, and through HCT measurement, a blood sugar concentration measured value is subjected to dynamic calibration so that a high-accuracy measured blood sugar value is obtained. The trigger electrode prevents blood sugar measurement inaccuracy caused by underfill of the reaction chamber with blood.
Owner:四川拉雅微科技有限公司
Method for producing internal reference nano PH sensor and using for in-cell PH non-trauma monitoring
InactiveCN1609600AUniform sizeGood dispersionMaterial analysis by observing effect on chemical indicatorChemiluminescene/bioluminescenceFluorescenceOil phase
The present invention aims at synthesizing one kind of nanometer pH sensor with embedded reference dye and sensitive dye and stable performance for non-invasive monitoring of dynamic pH variation inside cell. The preparation process includes mixing oil phase cyclohexane, surfactant Triton X-100 and co-surfactant n-hexanol and water as dispersive phase to obtain water-in-oil micro emulsion; adding mixed sensitive and reference dye liquid via stirring; adding ethyl acetate as sylylation reagent, TEOS and catalyst ammonia water to react, demulsifying with acetone, washing with absolute ethanol and super-purified water to obtain inner reference nanometer sensor with silicon shell. The inner reference nanometer sensor is used in non-invasive dynamic intracellular pH monitoring.
Owner:HUNAN UNIV
Optical current transformer based on dual-wavelength structure and measurement method thereof
InactiveCN105486905AAvoid inaccurate measurementsSimple structureVoltage/current isolationPolarizerPrism
The invention discloses an optical current transformer based on a dual-wavelength structure. The optical current transformer comprises a first light source 1, a second light source 2, an optical fiber coupler 3, a sensor 4, a first wavelength division demultiplexer 5, a second wavelength division demultiplexer 6, a first photoelectric detector 7 and a second photoelectric detector 8, which are connected in sequence through optical fibers. The sensor 4 is internally provided with the following optical elements in sequence: a first collimator 9, a polarizer 10, a magneto-optical crystal 11, a polarization splitter prism 12, a second collimator 13 and a third collimator 14. The measurement method comprises the following steps: obtaining function relationship between the temperature and Verdet constants of the magneto-optical crystal under two different wavelengths; in the actual measuring process, obtaining rotation angles theta1 and theta2 of two polarized light beams of different wavelengths obtained after passing through the magneto-optical crystal under the effect of an external magnetic field; and carrying out calculation to obtain the temperature T and the magnetic field intensity H, and finally obtaining the measured current value according to the relation between the current I and the generated magnetic field H. Therefore, accuracy of measurement result is improved.
Owner:TIANJIN UNIV
Online measurement system and method for geometric parameters of wheel set
ActiveCN104648440AImprove accuracyHigh precisionWheel-rims surveying/measuringEngineeringStructured light
The invention provides an online measurement system and an online measurement method for geometric parameters of a wheel set. The system comprises at least one measurement unit, wherein the measurement unit comprises at least one sensor group; each sensor group comprises a first structured light sensor and a second structured light sensor; each first structured light sensor is a multi-line structured light sensor and is arranged inside a rail of the wheel set; each second structured light sensor is arranged outside the rail of the wheel set. According to the measurement system disclosed by the invention, the geometric parameters of the wheel set are measured quickly and accurately online.
Owner:BEIJING JIAOTONG UNIV
Stretch-compress integrated automobile transmission shaft detection apparatus
ActiveCN105758288ACompact structureReduce manufacturing costMachine gearing/transmission testingUsing electrical meansPull forceMotor drive
Owner:ZHEJIANG UNIV OF TECH
Suspension rope and stable rope tension online detection device and method in vertical shaft construction
ActiveCN104374508AAvoid inaccurate measurementsAvoid measurement errorsTransmission systemsTension measurementObservational errorEngineering
The invention provides a suspension rope and stable rope tension online detection device and method in vertical shaft construction. The device is mainly composed of a pressure detecting part arranged on a derrick and a steel wire rope frequency detecting part arranged on the ground of a wellhead. The pressure detecting part mainly comprises a bevel support fixed to the hoisting sheave derrick, a pressure sensor fixedly installed on the bevel of the bevel support, and a bearing pedestal fixedly connected with the pressure sensor; the steel wire rope frequency detecting part mainly comprises a frequency detecting device and a signal acquiring device used for acquiring frequency signals. The propagation frequency of vibration waves on a steel wire rope can be detected regularly through the steel wire rope frequency detecting device arranged on a well lid platform, the tension of the steel wire rope can be obtained according to the length l of the steel wire rope and the rope density rho, measurement errors caused by the upsetting moment of the bearing pedestal can be effectively avoided, and therefore the pressure sensor can be corrected. The device is simple in structure, convenient to operate, capable of performing real-time detection, easy and convenient to install, free of demolition of a stable rope and accurate in measurement and signal transmission is convenient.
Owner:CHINA UNIV OF MINING & TECH
Automatic dielectric material surface charge measuring device on basis of two-axis slide table
PendingCN108152354AReal-time processingEasy to operateMaterial analysis by electric/magnetic meansDielectricMeasurement device
The invention discloses an automatic dielectric material surface charge measuring device on the basis of a two-axis slide table, and belongs to the field of solid dielectric material surface charge measurement. The automatic dielectric material surface charge measuring device comprises the two-axis movement slide table, an electrometer probe support, a high-voltage electrode support and an upper PC (personal computer). A dielectric test specimen support is connected with the two-axis movement slide table and can be driven by the two-axis movement slide table to move in a plane; the electrometer probe support and the high-voltage electrode support are arranged in an upper space of the movement plane of the dielectric test specimen support; the upper PC is in communication connection with the two-axis movement slide table, the electrometer probe support and the high-voltage electrode support, and surface charge detection can be carried out on test specimens on the dielectric test specimen support by the two-axis movement slide table, the electrometer probe support and the high-voltage electrode support under the control of the upper PC. Compared with the prior art, the automatic dielectric material surface charge measuring device has the advantages that the automatic dielectric material surface charge measuring device is easy to operate and accurate in movement control; acquireddata can be processed in real time, and surface charge distribution conditions of materials can be visually displayed by the aid of software.
Owner:SICHUAN UNIV
Method and device for evaluating machine vision original-value detection of exterior corrosion appearance characteristics of material
InactiveCN103674968AAvoid inaccurate measurementsImprove accuracyOptically investigating flaws/contaminationMachine visionSharpening
The invention discloses a method and a device for evaluating the machine vision original-value detection of the exterior corrosion appearance characteristics of a material. The evaluating method comprises the following steps: using a digital camera or a video camera to collect the exterior image information of the material and digitally processing the image; distinguishing the corrosion characteristics information of the material from the collected exterior corrosion characteristic image information of the material; improving the quality of the image through filtering, denoising, image sharpening and histogram equalization; adopting a pattern theory and an image recognition method to obtain the exterior corrosion characteristic image information of the material, and comparing the corrosion characteristics information of the material with corresponding material exterior corrosion rating standards so as to evaluate the corrosion grade of the material. The device for evaluating the machine vision original-value detection of the exterior corrosion appearance characteristics of the material comprises a light source, a sample putting platform, the digital camera, a lens or the video camera and a computer. Through the method and the device, the accuracy of corrosion characteristic detection is improved, and the error of a detection result is reduced.
Owner:CHONGQING UNIV OF TECH
Method for calibrating heat flow meter method conductometer based on guarded hot plate method
ActiveCN108152325AAvoid inaccurate measurementsAvoid repeat purchasesMaterial heat developmentHeat flowMaterials science
The invention discloses a method for calibrating a heat flow meter method conductometer based on a guarded hot plate method, and belongs to the field of calibration of thermal conductivity measuring apparatus. The method disclosed by the invention is characterized in that a guarded hot plate method conductometer is used for measuring a thermal conductivity value of a thermal conductivity standardplate, the thermal conductivity standard plate is assigned with a value at the corresponding temperature, and then the thermal conductivity standard plate assigned with the value is put into a heat flow meter method conductometer to be calibrated to perform a calibration procedure, thereby obtaining calibration factors of the heat flow meter method conductometer at the corresponding test temperature. Thus, the defect that a heat flow meter method conductometer with a fixed structure needs to be disassembled to solely calibrate heat flow meter parts is avoided, and meanwhilefurthermore, the problem of inaccurate apparatus measurement indirectly caused by disassembling the conductometer is avoided.
Owner:ZHEJIANG MEASUREMENT SCI RES INST
Voltage measuring circuit, method and equipment
The invention relates to a voltage measuring circuit, method and equipment. A to-be-measured conductor is electrically coupled to the voltage measuring circuit by adopting a first coupling device and a second coupling device, a coupling capacitor is formed between the to-be-measured conductor and the coupling devices, and when a voltage measuring device obtains a reference signal source and independently acts on the voltage measuring circuit, the first reference voltage division value at the two ends of the voltage division capacitor bank performs analysis. If the ratio of the first reference partial voltage value to the reference voltage value of the voltage measuring device does not meet the preset ratio range, the voltage measuring range (the reference voltage value) of the voltage measuring device is not matched with the measured voltage value (the first reference partial voltage value) at the moment. At the moment, the voltage measuring device changes the size of the first reference partial voltage value by adjusting the capacitance value of the partial voltage capacitor bank so as to enable the first reference partial voltage value to be matched with the reference voltage value, and therefore the problem that in the voltage measuring process, due to the fact that the measuring range is too large or too small, the measuring result is inaccurate is solved.
Owner:CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD +1
High-temperature solid oxide single electrolytic cell fixing test bracket
InactiveCN101216445AWith insulationHigh temperature resistantMaterial electrochemical variablesElectrochemistryAtmosphere
A high-temperature solid oxide monomer electrolytic cell fixing test stand comprises a stainless steel flange, and a monomer electrolytic cell test fixing fixture and a monomer electrolytic cell test stand, which are disposed on the stainless steel flange, wherein, the electrolytic cell test fixing fixture includes a high-temperature stainless steel support plate, a high-temperature stainless steel pillar, a stainless steel nut, a polytetrafluoroethylene gasket, a spiral spring and a square stainless steel nut; and the monomer electrolytic cell test stand includes a high-temperature ceramic tube, a high-temperature ceramic ring, a monomer electrolytic cell sheet and a stainless steel sealed joint. The high-temperature solid oxide monomer electrolytic cell fixing test stand of the invention can be used for electrochemical performance test and evaluation of monomer electrolytic cell at high temperature and in the presence of different atmospheres. By combining ceramic material and high-temperature stainless steel material, the invention has the advantages of convenient operation, convenient assembly, flexible usage, etc.
Owner:TSINGHUA UNIV
Multipath laser beam automatic collimation device
ActiveCN104330897ASolve the problem of no natural fiducials such as spatial filtersSolving the problem of natural benchmarksOptical elementsAutocollimationLight beam
The invention discloses a multipath laser beam automatic collimation device. Multipath beam near-field and far-field reference synchronous images are transmitted to a photosensitive screen based on an image transmission automatic collimation structure of plug-in type fork wire arrays and fluorescence imaging by utilizing a double-cross fork wire array image transmission light path, and fluorescence imaging records of multiple beams generated by visible light CCD are utilized so that a problem of light path collimation near-field and far-field reference is solved, and integrated high-efficiency automatic collimation of multipath laser beams is also realized.
Owner:NORTHWEST INST OF NUCLEAR TECH
Manufacturing method for standard mass membrane used for beta-ray particulate matter calibration
The invention provides a manufacturing method for a standard mass membrane used for beta-ray particulate matter calibration. According to the invention, chemical etching is utilized to control equivalent mass of the membrane, process requirements are low, manufacturing of the standard mass membrane can be carried out in a chemical laboratory of a normal grade, medicines and materials needed in manufacturing have low cost and are easily available, the standard mass membrane can be made at any time as needed instead of being imported from abroad, work efficiency of measuring can be guaranteed, fixation of the membrane is firm, the problem of inaccurate measurement results resulting from deformation caused by unfirm bonding of the membrane is avoided, the thickness of the membrane is not a fixed value, the equivalent mass can be in a required range, and the standard mass membrane has a wide application scope.
Owner:QINGDAO JIAMING MEASUREMENT & CONTROL TECH
Device of measuring thickness of steel strip during production process by using distance sensor
ActiveCN105627966ARealize continuous online detectionCompact structureMeasurement devicesEngineeringDistance sensors
The invention discloses a device of measuring the thickness of a steel strip during a production process by using a distance sensor, which comprises a box-type shell, a supporting plate, a rechargeable battery, a flatting device, a distance sensor, four pairs of transmission roller groups, a steel strip buffer device and a pressure detection device, wherein the box-type shell, from inside to outside along the steel strip horizontal movement direction, is sequentially provided with a left limiting block, a first transmission roller group, the flatting device, a second transmission roller group, a right limiting block, a third transmission roller group, the steel strip buffer device and a fourth transmission roller group; the steel strip buffer device comprises an upper ejector roller, an upper ejector rod, a fixing block, a supporting seat and a reset spring; the upper ejector roller is fixed at the top part of the vertically-arranged upper ejector rod; and the upper ejector roller is contacted with the steel strip for lifting the steel strip. The device of the invention has the advantages that the moving is convenient; the operation is simple; the measurement process can be carried out in an online mode; the detection process is continuous; data calling is carried out conveniently; measurement on coiled steel strip is greatly facilitated; and mass promotion and use are facilitated.
Owner:浙江海宁经编产业园区开发有限公司
LED street lamp with automatic cleaning function
InactiveCN106704939AAvoid damageAvoid inaccurate measurementsMechanical apparatusElectric circuit arrangementsMicrocontrollerAutomatic control
The invention discloses an LED street lamp with an automatic cleaning function. The LED street lamp comprises a lamp column, an LED lamp, a water storer and a water inlet valve; a nozzle is connected to the water storer through a pipe; and a water pump is arranged on the pipe. The LED street lamp further comprises a single-chip; photosensitive sensors are respectively mounted in the LED lamp and on the outer side of the LED lamp; the single-chip receives illumination intensity signals for comparison; when a difference value of two illumination intensity signals is higher than a set value, the water pump is triggered to work; a liquid level sensor is arranged in the water storer for acquiring liquid level signals in the water storer and transmitting to the single-chip; and when the liquid level is located in a set lowest level, the water inlet valve is controlled to feed water in the water storer. The LED street lamp can clean the surface under the condition of influencing normal use by floating soil on the surface thereof, can flexibly set the water spraying direction through a mode of multiple nozzles in one set, and finishes the purpose of automatic control through the single-chip control mode.
Owner:四川嘉格照明工程有限公司
LED street lamp capable of monitoring PH value of acid rain
ActiveCN106801860AAvoid damageAvoid inaccurate measurementsMechanical apparatusLighting elementsEnvironmental engineeringPh measurement
The invention discloses an LED street lamp capable of monitoring the PH value of acid rain. The LED street lamp comprises an upper shell and a lower shell. The upper surface of the upper shell is concave downwards to form collection and sedimentation grooves, storage grooves and a guiding cone, which are arranged from outside to inside. The collection and sedimentation grooves are separated from the storage grooves by means of flooding rings. The storage grooves are separated from the guiding cone by means of collecting rings. An arc-shaped drainage plate at least covering the flooding rings is arranged above the upper shell. The gap between the arc-shaped drainage plate and the upper shell is taken as a rainwater collection inlet. The lower part of the guiding cone is connected with a PH measurement device by means of a guide pipe. A relatively reasonable rainwater collection process can be formed, a sedimentation effect on to-be-detected rainwater is achieved, damage of particle impurities in rainwater on a sensitive PH probe is avoided, that is, all that is needed is to meet a certain amount of rainfall, measurement can be conducted, and inaccurate measurement caused in the rainfall process with a small amount of rainfall is avoided.
Owner:四川新金鑫照明科技有限公司
Cow weight prediction system
PendingCN110415282AAccurate acquisitionAccurate calculationImage enhancementImage analysisCamera imageFeature vector
The invention provides a cow weight prediction system, which comprises the following steps of 1, obtaining three-dimensional world coordinates of scenery points through a multi-view stereoscopic vision distance measurement method; 2, calibrating a camera; establishing a relationship between a camera image pixel position and a scene point, obtaining a relationship between the three-dimensional coordinate information of the space object and the two-dimensional information of the acquired image, and further recovering information such as depth and the like missing due to acquisition by utilizingthe relationship; 3, matching feature points; carrying out similarity measurement on the SIFT feature vectors of the two images to be matched, and calculating nearest matching of each feature point ofone image in the feature point set of the other matched image; and 4, determining the body size of the dairy cow according to the obtained feature points, and obtaining a dairy cow weight predictionresult according to a preset prediction model.
Owner:宁夏金宇智慧科技有限公司
Microcomputer automatic quasi-synchronization paralleling realization method
InactiveCN102170143ASolve problems that are difficult to measure precisely at the same timeSmall amount of calculationSingle network parallel feeding arrangementsPhase differencePower equipment
The invention discloses a microcomputer automatic quasi-synchronization paralleling realization method. The method comprises following steps: step1) taking sample to obtain the sampling sequences {uG(n)} and {uX(n)} of generator voltage uG(t) and system voltage uX(t); step2) carrying out the short time Fourier transform added with discrete rectangular self convolution window to on the sampling sequence, and realtimely detecting the generator voltage and frequency, amplitude and phase angle of the system voltage; step3) calculating the voltage frequency difference, amplitude difference and angular phase difference of the parallel two sides, and carrying out the synchronous condition detection and the synchronous points forecast. The microcomputer automatic quasi-synchronization paralleling realization method has no need for taking whole period sample to paralleling voltage signal and has advantages of simple realization and less calculated amount. The method, which can do accurate measurement of the amplitude, the frequency and the phase angle for voltage signal with frequency change in large scale, can improve the reliability, accuracy and rapidity of the quasi-synchronization paralleling operation and can reduce the impact from the paralleling operation to the electrical network and the electric power device, and the method also has engineering practical value.
Owner:HUNAN UNIV
Method for measuring steam-water mismatching amount of steam generator
ActiveCN101846535AAvoid inaccurate measurementsImprove securityIndirect mass flowmetersObservational errorNuclear power
The invention discloses a method for measuring the steam-water mismatching amount of a steam generator for a nuclear power station, which comprises the following steps of: (1) measuring water supply temperature TFW and water supply flow mFWM of water entering the steam generator to obtain actual flow mFW; (2) determining thermal power PW required by converting the water into steam; (3) determining thermal power PS generated by a loop of a reactor; and (4) determining steam-water mismatching amount (PW-PS). In the method, the actual water supply flow of the steam generator is corrected, and the steam-water mismatching amount of the flow is changed into the thermal power mismatching amount, so that the problem of inaccurate flow measurement caused by the change of temperature and pressure of the steam is solved fundamentally, the measurement error is reduced, and the safety and reliability of the nuclear power station are improved. The actual operation of the integral measuring method only needs the accurate measurement of the water supply flow mFWM and the water supply temperature TFW, and thus the method has the advantages of few required measurement parameters, convenient operation and high accuracy and feasibility.
Owner:JIANGSU NUCLEAR POWER CORP
Solid electrolyte ionic conductivity test clamp, solid electrolyte ionic conductivity test system and solid electrolyte ionic conductivity test method
PendingCN107219400ATight and even contactAvoid damageResistance/reactance/impedenceMeasurement instrument housingElectro conductivityEngineering
The present invention discloses a solid electrolyte ionic conductivity test clamp. The clamp comprises: a first clamping portion and a second clamping portion which are detachably connected and configured to clamp a solid electrolyte; and a pressure sensor configured to measure the pressure values of the first clamping portion and / or the second clamping portion for the solid electrolyte. The contact condition of the first clamping portion, the second clamping portion and the solid electrolyte is dynamically regulated according to the pressure values between the solid electrolyte and the first clamping portion and between the solid electrolyte and the second clamping portion to allow the first clamping portion and / or the second clamping portion to perform tight and uniform contact with the solid electrolyte so as to avoid the damaging caused by too large pressure of the first clamping portion and the second clamping portion for the solid electrolyte and avoid the problem that the measurement result is not accurate caused by bad contact between the solid electrolyte and the first clamping portion and between the solid electrolyte and the second clamping portion. The present invention further provides a solid electrolyte ionic conductivity test system. The present invention further provides a solid electrolyte ionic conductivity test method.
Owner:ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
Pixel sensor device and operating method thereof
InactiveCN105373764AAccurate focusHigh precisionCharacter and pattern recognitionComputer scienceSingle pixel
Owner:ELAN MICROELECTRONICS CORPORATION
Oxygen detector, detection method and application
ActiveCN111579619ASolve the problem of inaccurate oxygen concentrationIncrease temperatureMaterial analysis by electric/magnetic meansFluid pressure measurement by mechanical elementsThermodynamicsControl cell
The invention provides an oxygen detector, a detection method and application. The oxygen detector comprises an air inlet provided with an oxygen permeation membrane, a heater is installed close to the air inlet, the heater is connected with a control unit, and the control unit is connected with a temperature sensor; the temperature sensor comprises a first temperature sensor mounted on the oxygenpermeation membrane and a second temperature sensor mounted in the oxygen detector and used for detecting the environment temperature; the control unit is used for receiving temperature signals of the first temperature sensor and the second temperature sensor so as to control the heater to conduct heating, and it is guaranteed that the temperature of the oxygen permeation membrane is higher thanthe environment temperature. By additionally arranging the temperature sensor, the temperature of the environment where the oxygen detector is located and the temperature of the oxygen permeation membrane can be detected, then the heater is controlled to heat the oxygen permeation membrane, the temperature of the oxygen permeation membrane is higher than the environment temperature, and thereforewater vapor is prevented from condensing on the oxygen permeation membrane.
Owner:JIANGSU JICUI DEPTH SENSING TECH RES INST CO LTD
Medical detection equipment for color blindness
InactiveCN107157438ASimple structureEasy to operateEye diagnosticsArchitectural engineeringColor blind
The invention discloses a color-blindness detection device for medical use, which comprises a detection box. The bottom of the detection box is provided with evenly distributed hydraulic telescopic rods. There are two opposite telescopic rods, the telescopic rod includes an inner rod and an outer rod, one end of the bottom of the inner rod and one end of the top of the outer rod are provided with connected strip-shaped through holes, and the strip-shaped through holes on the inner rod are set through There are fixed bolts, and fixed screw rings are arranged on the fixed bolts, pin shafts are arranged at both ends of the telescopic rod, and the bottom of the detection box and the top of the supporting base are provided with movable connection seats corresponding to the telescopic rod. There are four evenly distributed guide rollers inside, and the front and back of the guide rollers are equipped with mandrels. The medical color-blindness detection device has a simple structure and more convenient operation, and effectively improves the accuracy of color-blindness detection.
Owner:袁方
Photoacoustic absorption cell and online measuring device for multiple optical parameters of atmospheric particulate matters
InactiveCN106644942ASynchronous online measurementImprove measurement accuracyMaterial analysis by optical meansAbsorption cellParticulates
The invention discloses a photoacoustic absorption cell and a synchronous online measuring device for multiple optical parameters of atmospheric particulate matters on the basis of the photoacoustic absorption cell. Absorption coefficients and scattering coefficients of the atmospheric particulate matters on the cell can be synchronously measured by the aid of the U-shaped photoacoustic absorption cell in an online manner on the basis of photoacoustic spectrum technologies and weak optical signal detection technologies, extinction coefficients and single-scattering albedo of the atmospheric particulate matters further can be obtained, and the multiple optical parameters of the particulate matters can be measured in an online manner. The photoacoustic absorption cell and the synchronous online measuring device have the advantages that the shortcomings of measurement errors due to spatial and temporal heterogeneity of samples when the samples are measured by multiple facilities or absorption coefficient measurement errors due to transmission errors during extinction and scattering synchronous measurement can be overcome, and the measurement accuracy and real-time performance of the single-scattering albedo can be effectively improved.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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