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32results about How to "Comparable accuracy" patented technology
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Lithographic apparatus, measurement system, and device manufacturing method
ActiveUS7102729B2Comparable accuracyReduce Algorithmic ComplexityUsing optical meansPhotomechanical exposure apparatusEngineering
The invention pertains to a measurement system for measuring displacement of a moveable object relative to a base in at least a first direction of measurement, the moveable object having at least one reference part that is moveable in a plane of movement relative to the base, the actual movements of the reference part being within an area of said plane of movement that is bounded by a closed contour having a shape. The measurement system comprises a sensor head that operatively communicates with a planar element. The sensor head is mounted onto the base and the planar element being mounted onto the reference part of the moveable object or the other way around, wherein the planar element has a shape that is essentially identical to the shape of the closed contour.
Owner:ASML NETHERLANDS BV
Lithographic apparatus, measurement system, and device manufacturing method
ActiveUS20050168714A1Comparable accuracyReduce Algorithmic ComplexityUsing optical meansPhotomechanical exposure apparatusEngineeringMobile object
The invention pertains to a measurement system for measuring displacement of a moveable object relative to a base in at least a first direction of measurement, the moveable object having at least one reference part that is moveable in a plane of movement relative to the base, the actual movements of the reference part being within an area of said plane of movement that is bounded by a closed contour having a shape. The measurement system comprises a sensor head that operatively communicates with a planar element. The sensor head is mounted onto the base and the planar element being mounted onto the reference part of the moveable object or the other way around, wherein the planar element has a shape that is essentially identical to the shape of the closed contour.
Owner:ASML NETHERLANDS BV
Lithographic apparatus and method for determining Z position errors/variations and substrate table flatness
InactiveUS20060139595A1Easy to useComparable accuracyBroaching toolsPhotomechanical treatmentEngineeringPosition error
The invention pertains to a measurement system for measuring displacement of a moveable object relative to a base in at least a first direction of measurement, the moveable object having at least one reference part that is moveable in a plane of movement relative to the base, the actual movements of the reference part being within an area of said plane of movement that is bounded by a closed contour having a shape. The measurement system comprises a sensor head that operatively communicates with a planar element. The sensor head is mounted onto the base and the planar element being mounted onto the reference part of the moveable object or the other way around, wherein the planar element has a shape that is essentially identical to the shape of the closed contour.
Owner:ASML NETHERLANDS BV
Equipment for measuring intra-ocular pressure and method for measuring intra-ocular pressure using same
The invention relates to equipment for measuring intra-ocular pressure, which is mainly characterized by comprising a probe supported in a probe shoulder, a plurality of coils wound on a framework, and a circuit board for collecting and processing voltage signals of the coils. The probe consists of a plastic probe head and a magnetic probe tail, and the probe tail consists of one or several joints of magnetic needles. The equipment for measuring the intra-ocular pressure is mainly characterized in that the coils are electrified with different directions to drive the magnetic needles at the probe tail to ensure part of the probe head to move toward or far away from a cornea at a high speed, and the intra-ocular pressure is figured out by the time interval between the probe closing to the cornea and the probe just leaving the cornea. By adopting the technical scheme of the invention, the speed-up time of the probe is shortened, the retention time of high speed motion is long, and the system efficiency is high, thereby fully ensuring that the probe can hit against the surface of the cornea at a speed high enough, greatly reducing the complexity and cost of the system, and simultaneously improving the reliability of the system.
Owner:TIANJIN SUOWEI ELECTRONICS TECH
Low-cost fiber optic sensor for large strains
InactiveUS20160305771A1Highly elasticHighly extensibleGlass optical fibreUsing optical meansYoung's modulusOptoelectronics
A fiber grating device of low cost and arbitrary length is formed on a portion of a portion or the entirety of a highly elastic fiber optic core having a low Young's modulus of elasticity by causing elongation of the fiber optic core and forming or depositing a hard skin or cladding on the elongated fiber optic core. When the stress is then released, the hard skin or cladding buckles (including elastic or plastic deformation or both) to form wrinkles at the interface of the fiber optic core and the hard skin or cladding which are oriented circumferentially and highly uniform in height and spacing which can be varied at will by choice of materials, stretching, and thickness and composition of the cladding. Since the elastic elongation of the fiber optic core portion may be 200% or greater, an unprecedented measurement range is provided.
Owner:WASHINGTON STATE UNIVERSITY
Point cloud simplification method based on curved surface change
InactiveCN105069845AReduce mistakesComparable accuracyImage data processingCharacteristic pointSurface change
The present invention discloses a point cloud simplification method based on curved surface change. The method comprises the steps of carrying out space grid rasterization on scattered point cloud, calculating curved surface change and dividing each point into three different characteristic areas according to the curved surface change, using the curved surface change to define an approximate characteristic point threshold, calculating the simplification ratios of points whose curved surface changes are smaller than the characteristic point threshold according to different characteristic areas to which the points belong, and defining a distance threshold to complete simplification by the simplification ratios. Compared with a traditional method, the calculation speed of the method is fast, and a characteristic boundary and surface details can be maintained.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Positioning system and positioning method for take-off deviation of airplane
The invention discloses a positioning system for a take-off deviation of an airplane, which comprises a signal generator, a signal acquisition device and a deviation positioning unit, wherein the signal generator consists of power-on solenoids vertical to each other, is arranged on an airstrip and is used for transmitting a signal; the signal acquisition device is arranged on a nose of the airplane and is used for receiving the signal transmitted by the signal generator; and the deviation positioning unit is connected with the signal acquisition device and is used for carrying out real-time resolving on the acquired signal to determine a distance that the nose of the airplane deviates the center line of the airstrip. The invention also provides a positioning method for the take-off deviation of the airplane. The positioning system of the invention has low cost. The precision of the positioning system is higher than that of the common GPS system and is equivalent to that of a GBAS system. The positioning system has simple structure, is easy to arrange, can be applied to the field opportunity airfield and is unlike the GBAS system which needs to arrange an expensive ground base station. The positioning system is self-provided with a signal source, is independent from the commonly used global positioning system and can be applied to the runways in large-scale shelters and the areas with bad satellite signals.
Owner:TSINGHUA UNIV
3D hand-eye calibration method and device for mobile robot
PendingCN113362396AVersatilityNo human errorImage enhancementImage analysisPoint cloudComputer graphics (images)
The invention provides a 3D hand-eye calibration method and device for a mobile robot. The method comprises the following steps: S1, calibrating the view finding range of a camera to cover all degrees of freedom of the mobile robot; S2, recording point cloud data of a calibration ball held by the mobile robot in a camera coordinate system and a robot pose corresponding to the calibration ball in a current robot coordinate system to form n groups of point cloud data; S3, extracting the point cloud of the spherical surface of the calibration ball, and determining the coordinate value of the center point of the calibration ball in the camera coordinate system in each group of point cloud data by adopting a least square fitting algorithm; S4, solving offset and a hand-eye calibration matrix according to a first algorithm according to the pose of the robot and the coordinates of the center point of the corresponding calibration ball; and S5, converting the hand-eye calibration matrix into an Euler angle form, and taking a hand-eye calibration matrix result as an initial value of nonlinear optimization; and respectively calculating a hand-eye calibration matrix and a difference value between the offset and the truth value according to a second algorithm, and correcting the hand-eye calibration matrix according to the difference value. Therefore, the adaptation requirement for the degree of freedom of the robot is lowered, and the universality is improved.
Owner:上海仙工智能科技有限公司
Tesseract engine based character recognition method and device
ActiveCN105825214AImprove recognition accuracyComparable accuracyCharacter recognitionPicture recognitionTesseract
The invention discloses a tesseract engine based character recognition method and device. A cloud-end server updates a local literal pool to correct a recognition result of the tesseract engine, and the precision in recognizing characters in images of the tesseract engine is improved. The character recognition device comprises a server, a tesseract engine module, the cloud-end server and the local literal pool. When the local literal base is upgraded, the server uses characters recognized by the cloud-end server to correct the recognition result of the tesseract engine module, and the local literal pool is supplemented with characters that cannot be recognized correctly by the tesseract engine module. Thus, the recognition precision can be improved by inquiring the local literal pool during character recognition. According to the invention, the upgraded local literal pool is used to correct the recognition result of the tesseract engine module, the precision when the cloud-end server is directly used for character recognition can be achieved, time of character recognition operation is shortened, and the method and device are suitable for recognizes images in daily learning and life into characters.
Owner:HANGZHOU CCRFID MICROELECTRONICS
Methods of linearly amplifying whole genome of a single cell
ActiveUS20170183721A1Improve uniformityImprove fidelityMicrobiological testing/measurementGenomeAmplicon
Embodiments of the disclosure encompass methods of amplifying nucleic acid from one or more cells using MALBAC (multiple annealing and looping-based amplification cycles) primers. In particular embodiments, the nucleic acid is amplified as amplicons in a linear manner. Specific embodiments include the removal or effective destruction of nonlinearly produced amplicons.
Owner:BAYLOR COLLEGE OF MEDICINE
Low-orbit satellite-borne GNSS precise orbit determination method and system based on inter-position dynamics constraint
ActiveCN112129300AShort integral arcReduced precision requirementsInstruments for comonautical navigationSatellite radio beaconingObservation dataEphemeris
The invention relates to a low-orbit satellite-borne GNSS precise orbit determination method and system based on inter-position dynamic constraints. The method comprises the steps of obtaining GNSS precise ephemeris, a clock difference file, low-orbit satellite attitude data and satellite-borne GNSS observation data, obtaining a low-orbit satellite orbit pseudo-range solution, calculating the inter-position dynamic constraints of a low-orbit satellite, and calculating an approximate low-orbit satellite prior orbit; and performing data editing on satellite-borne GNSS observation data, establishing an orbit determination observation model and a random model in combination with dynamic constraints, and resolving a low-orbit satellite precision orbit to realize satellite-borne GNSS precision orbit determination of the low-orbit satellite. According to the method, the error model of the orbit dynamics model is adopted to consider the influence of the error on orbit determination, a complexhigh-precision satellite orbit dynamics model is not needed while the orbit determination precision is ensured, and unknown dynamics parameters or pseudo-random parameters do not need to be estimated;the orbit integral arc section is short, and the calculation efficiency is relatively high; and GNSS observation data with unequal sampling intervals can be processed, and the method is very suitablefor precise orbit determination of low-orbit satellites.
Owner:WUHAN UNIV
Plane right-angle instrument for marking line
InactiveCN101451837AReduce manufacturing costEliminate visual errorsSurveying instrumentsLaser transmitterTheodolite
The invention provides a plane rectangular payingoff apparatus, comprising a laser emitter body and two laser receiver bodies; the laser emitter body comprises a stauroscope, a laser emitter, a sight line groove, a laser emitting shaft endpoint, a laser emitter switch, an optical plummet, a circular bubble, a tubular leveling instrument, a tripod, a tripod center connecting screw rod, a helix angle, a triangular base, a level brake fine-tuning bolt, a terminal disc and a cross division line; the laser receiver body comprises a stauroscope, a cross division line, an optical plummet, a circular bubble, a terminal disc, a tripod center connecting screw rod, a tripod, a helix angle, a triangular base, a tubular leveling instrument and a level brake fine-tuning bolt. The invention has the beneficial effects that: the invention saves the production cost of the apparatus, and improves the work efficiency; the precision and the theodolite are appropriate and have convenient operation and simple processing and eliminate the collimation error of the operators.
Owner:居涛
Technique to measure the distance between stations using dgps/rtk GPS in the velocity area method (stationary) with an acoustic doppler current profiler
ActiveUS20180156647A1Address limitationsAccurate measurementVolume/mass flow measurementMeasuring open water movementControl signalLongitude
A system for determining a measurement of a discharge of a streamflow in open channel conditions using a velocity-area technique featuring a signal processor configured to receive ADCP measurement signaling containing information about ADCP measurements taken in conjunction with the streamflow, GPS signaling containing information about GPS readings in conjunction with ADCP measurements, and signaling containing information about a projection or virtual tag line using two (2) Global Position System (GPS) locations having start and end latitudes and longitudes at a measurement site in a hydrographic operation for a measurement of a discharge in open channel conditions, and an instantaneous GPS position for a station; and determine control signaling containing information to take the ADCP measurements and the GPS readings in conjunction with the ADCP measurements, as well as corresponding signaling containing information about the measurement of the discharge of the streamflow, based upon a respective distance between each station in relation to the projection or virtual tag line, as well as ADCP signaling and the GPS signaling received, using Differential Global Position System (DGPS) or Real Time Kinematic GPS (RTK GPS).
Owner:YSI INC
Determination method for cadmium amount in copper slag
ActiveCN104049028AAnalysis speed is accurateAccurate dataMaterial electrochemical variablesElectrolysisPolarography
The invention discloses a determination method for cadmium amount in copper slag. The determination method disclosed by the invention adopts an oscillographic polarography which comprises the following steps: taking hydrochloric acid-ammonium acetate as a base solution, pouring a prepared sample solution into an electrolysis cup for oscillographic polarograph photoplotting, and anodizing dipolar derivative waves, starting scanning when an origin potential is -224 mV, and measuring an output peak value; transferring and taking a pure cadmium standard solution along with a sample to obtain the output peak value of the pure cadmium standard solution; calculating the cadmium content in the copper slag sample by using a standard contrast method according to the concentration and the output peak value of the standard solution. Compared with a classic hydrochloric acid base solution method and an ammoniacal base solution method, the analysis method for determining the cadmium amount in copper slag by using the oscillographic polarography disclosed by the invention is stable in waveform and quite high in accuracy; the method is easy and fast, and also eliminates the influence of ammonia gas on a human body; moreover, the determination method is good in precision and high in analysis speed, can meet the requirement for rapid analysis in production, meanwhile provides accurate and reliable data, so as to play a good role in guiding production.
Owner:BAIYIN NONFERROUS GROUP
Underwater acoustic network topology sensing method based on vector orientation and distance measurement
ActiveCN112558003AReduce the impactCheap ranging methodPosition fixationUsing reradiationHydrophoneEngineering
The invention relates to an underwater acoustic network topology sensing method based on vector orientation and distance measurement, and belongs to the field of underwater acoustic signal processing.The method comprises steps of supposing that the underwater acoustic network node only has one signal source node, orientating two signal sources simultaneously based on a single vector hydrophone, gradually positioning all node positions in the underwater acoustic network by taking the source node as a reference and adopting an RSSI (Received Signal Strength Indicator) distance measurement method, and further positioning all nodes in the underwater acoustic network according to a time relationship that a signal arrives at the vector hydrophone; judging the information flow direction of the internal nodes of the underwater acoustic sensor network to complete underwater acoustic network topology sensing. According to the method, only one vector hydrophone is used, RSSI ranging and mathematical geometry methods are combined, the required hardware is less, the operation is simple, and the adaptability is high.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Low-cost fiber optic sensor for large strains
InactiveUS9846276B2Highly elasticHighly extensibleGlass optical fibreForce measurement by measuring optical property variationWrinkle skinYoung's modulus
Owner:WASHINGTON STATE UNIVERSITY
Hull local curved surface optimization neural network modeling method and hull local curved surface optimization method
ActiveCN114818128AFast operationChange the operation flowGeometric CADArtificial lifeAlgorithmNetwork model
The invention discloses a ship body local curved surface optimization neural network modeling method and a ship body local curved surface optimization method, and relates to the field of ship design. In order to solve the problem that a large amount of initial sample data often need to be input in an existing agent model, the technical scheme provided by the invention is as follows: the method comprises the following steps: selecting a plurality of control points in a to-be-optimized ship body; changing the coordinates of the control points to obtain new control points, and taking the new control points as sample data corresponding to a plurality of ship types; hydrodynamic characteristic values are obtained to construct a BP neural network model; collecting a ship hydrodynamic characteristic value calculated by a BP neural network model and a difference value of ship hydrodynamic characteristic values corresponding to the group of control point coordinates obtained by a CFD technology as an error value; establishing a Kriging model, and taking an error value as output data; taking the sum of the error value and the output data as judgment data; and performing judgment, and if the judgment data meets a preset requirement, taking the judgment data as output data in combination with a BP neural network model and a Kriging model, thereby completing training. The method is suitable for being applied to ship body curved surface design work.
Owner:HARBIN ENG UNIV
A Method for Obtaining Amplitude of Single Frequency Signal
ActiveCN105242099BOperation is simple and convenientComparable accuracySpecial data processing applicationsPower gridPeak value
Owner:HI TREND TECH SHANGHAI
ELISA quantitative detection method of lactadherin or mucins 1 based on milk fat globule membrane characteristics
ActiveCN111537744AImprove throughputImprove accuracyBiological material analysisBiological testingPhysiologyWestern blot
The invention relates to an ELISA quantitative detection method of lactadherin or mucins 1 (MUC1) based on milk fat globule membrane characteristics, and particularly relates to an enzyme-linked immunosorbent assay (ELISA) method. The method comprises the steps of collecting a breast milk sample, pretreating the breast milk sample by using a na ve lysis buffer, and placing the breast milk sample on ice for cracking, carrying out Western Blot quantitative detection, and carrying out ELISA quantitative detection. The invention further comprises a kit for quantitatively detecting the lactadherinor MUC1 in the breast milk sample. The kit comprises a na ve lysis buffer reagent and a specification. The method has the advantages that the method is used for quantitatively detecting the lactadherin or MUC1 in the breast milk of the puerpera in different stages, the flux is high, the accuracy is high, the detection steps are simplified, the cost is low, and a scientific basis is provided for improving the formula milk powder.
Owner:SHANGHAI CHILDRENS MEDICAL CENT AFFILIATED TO SHANGHAI JIAOTONG UNIV SCHOOL OF MEDICINE
A high-precision clock chip compensation production system and method
ActiveCN112947034BLow costEasy to operateFrequency measurement arrangementArchitecture with single central processing unitEmbedded systemSoftware modules
The invention provides a high-precision clock chip compensation production system and method. The system includes a PC and a main control software module, a first-level main control unit, a second-level main control unit, a third-level main control unit assembly module, and a frequency measurement unit. Collection module, reference clock source module, chip DUT backplane module, thermostat module; three-level main control unit collection module contains several three-level main control units; frequency measurement unit collection module contains several frequency measurement units; chip DUT bottom board module Several chip DUT devices are arranged; the chip DUT bottom plate module is arranged in the temperature box. The production system of this scheme has low cost, high precision, good scalability, and significantly improved production efficiency.
Owner:北京炬玄智能科技有限公司
Data set generation method for phase estimation network training
PendingCN114596351AGood effectComparable accuracyImage analysisCharacter and pattern recognitionData setBinocular stereo
The invention relates to a data set generation method for phase estimation network training, and the method comprises the steps: employing a structured light three-dimensional scanner to project a phase shift fringe pattern to a plane, shooting the phase shift fringe pattern, and storing the phase shift fringe pattern as a reference pattern; collecting and obtaining a binocular stereo matching data set, replacing the right image with the reference image, determining the final stripe intensity of each point falling on the left image, and generating a training image; a wrapped phase is calculated according to the reference image, and a phase label value of a certain point is obtained according to parallax mapping; combining the training picture and the phase label value to synthesize a monocular structure light data set; according to the method, the image of the monocular structured light data set is formed by using the existing binocular stereo matching data set, the deep learning model obtained by training the data set can be generalized in a real scene, the effect of the method is superior to that of a traditional three-step phase shift algorithm, and the precision of the method is equivalent to that of a model obtained by training the real data set.
Owner:HEFEI UNIV OF TECH
A text recognition method and device based on tesseract engine
ActiveCN105825214BImprove recognition accuracyComparable accuracyCharacter recognitionText recognitionSoftware engineering
Owner:HANGZHOU CCRFID MICROELECTRONICS
Method for monitoring reaction in synthetic DNA coding compound
PendingCN110658163AComparable accuracyAvoid detectionFluorescence/phosphorescenceProtein nucleotide librariesSynthetic DNABiochemistry
The invention provides a method for monitoring reaction in a synthetic DNA coding compound. The method for monitoring reaction in the synthetic DNA coding compound provided by the invention applies the fluorescence labeling technology to synthetic DNA coding compounds. The method can quickly, accurately, and efficiently monitor the degree of reaction conversion of a synthetic DNA coding compound mixing system.
Owner:HITGEN INC
Device for self-aligning and affixing of a microchannel plate in a micro-system and method the same
InactiveUS9007784B2High aspect ratioComparable accuracySolid-state devicesSoldering apparatusElectrical contactsMicrochannel plate detector
A device and / or method mount and affix a microchannel plate in a micro system. The device and / or method has at least one conductive spring structure, formed to accept a microchannel plate, for aligning, fixing and making electrical contact with the microchannel plate. The device and / or method also has at least one stop against which the microchannel plate is pushed or pressed when affixed by at least one conductive spring structure, wherein the at least one conductive spring structure and the at least one stop are being applied on a non-conductive substrate.
Owner:BAYER AG +1
Seismic forward modeling method based on least square conjugate gradient iteration of frequency domain
PendingCN113671574AForward fast and efficientIteration conditions are looseSeismic signal processingWave equationComputational physics
The invention discloses a seismic forward modeling method based on least square conjugate gradient iteration of a frequency domain. The method comprises the following steps: inputting a time-harmonic wave equation after Fourier transform to the frequency domain; setting corresponding forward modeling simulation parameters; and performing iterative solution on the time-harmonic wave equation through a least square conjugate gradient algorithm according to the forward modeling simulation parameters. Compared with a forward modeling method based on LU direct solution, the method provided by the invention can reduce memory consumption and improve calculation efficiency under the condition of keeping the same precision, and compared with a forward modeling method based on BI-CGSTAB iterative solution, the method provided by the invention can obtain more loose use conditions and better calculation stability under the condition of approximate calculation efficiency.
Owner:SOUTHWEST PETROLEUM UNIV
Rapid transient calculation method and system for asymmetric 18-pulse phase-shifting self-coupling transformer rectifier
PendingCN114091230AImprove accuracyComparable accuracyAc-dc conversion without reversalDesign optimisation/simulationRectiformerTime domain waveforms
The invention discloses a rapid simulation transient calculation method and system for an asymmetric 18-pulse phase-shifting self-coupling transformer rectifier. The method specifically comprises the following steps of 1, deducing a relational expression between a winding output end voltage and a grid-side alternating current voltage and a relational expression between a winding output end current and a grid-side alternating current, 2, establishing a mathematical model of a corresponding switching function, 3, establishing a relational expression between the winding output end alternating current voltage and the rectified direct current voltage and a relational expression between the winding output end current and the rectified direct current, and 4, based on a time-frequency transformation theory, restoring the dynamic phasors of the direct current side voltage and the grid side alternating current into a time-domain waveform capable of visually reflecting the transient characteristics of the rectifier by using time-frequency transformation. The problems that an existing rapid simulation method does not have calculation accuracy and rapidity at the same time and is difficult to be suitable for a three-phase balanced system and a three-phase unbalanced system at the same time are solved.
Owner:XIAN UNIV OF TECH
Positioning system and positioning method for take-off deviation of airplane
Owner:TSINGHUA UNIV
High-precision clock chip compensation production system and method
ActiveCN112947034ALow costEasy to operateFrequency measurement arrangementArchitecture with single central processing unitEmbedded systemSoftware
The invention provides a high-precision clock chip compensation production system and method. The system comprises a PC, a master control software module, a first-stage master control unit, a second-stage master control unit, a third-stage master control unit set module, a frequency measurement unit set module, a reference clock source module, a chip DUT bottom plate module and an incubator module. The third-stage master control unit set module comprises a plurality of third-stage master control units; the frequency measurement unit set module comprises a plurality of frequency measurement units; a plurality of chip DUT devices are arranged on the chip DUT bottom plate module; and the chip DUT bottom plate module is arranged in the incubator. According to the scheme, the production system is low in cost, high in precision and good in expandability, and the production efficiency is remarkably improved.
Owner:北京炬玄智能科技有限公司
A method for measuring cadmium content in copper slag
ActiveCN104049028BAnalysis speed is accurateAccurate dataMaterial electrochemical variablesElectrolysisPolarography
The invention discloses a determination method for cadmium amount in copper slag. The determination method disclosed by the invention adopts an oscillographic polarography which comprises the following steps: taking hydrochloric acid-ammonium acetate as a base solution, pouring a prepared sample solution into an electrolysis cup for oscillographic polarograph photoplotting, and anodizing dipolar derivative waves, starting scanning when an origin potential is -224 mV, and measuring an output peak value; transferring and taking a pure cadmium standard solution along with a sample to obtain the output peak value of the pure cadmium standard solution; calculating the cadmium content in the copper slag sample by using a standard contrast method according to the concentration and the output peak value of the standard solution. Compared with a classic hydrochloric acid base solution method and an ammoniacal base solution method, the analysis method for determining the cadmium amount in copper slag by using the oscillographic polarography disclosed by the invention is stable in waveform and quite high in accuracy; the method is easy and fast, and also eliminates the influence of ammonia gas on a human body; moreover, the determination method is good in precision and high in analysis speed, can meet the requirement for rapid analysis in production, meanwhile provides accurate and reliable data, so as to play a good role in guiding production.
Owner:BAIYIN NONFERROUS GROUP
Technique to measure the distance between stations using DGPS/RTK GPS in the velocity area method (stationary) with an acoustic doppler current profiler
ActiveUS10982984B2Address limitationsAccurate measurementVolume/mass flow measurementMeasuring open water movementControl signalDifferential GPS
A system for determining a measurement of a discharge of a streamflow in open channel conditions using a velocity-area technique featuring a signal processor configured to receive ADCP measurement signaling containing information about ADCP measurements taken in conjunction with the streamflow, GPS signaling containing information about GPS readings in conjunction with ADCP measurements, and signaling containing information about a projection or virtual tag line using two (2) Global Position System (GPS) locations having start and end latitudes and longitudes at a measurement site in a hydrographic operation for a measurement of a discharge in open channel conditions, and an instantaneous GPS position for a station; and determine control signaling containing information to take the ADCP measurements and the GPS readings in conjunction with the ADCP measurements, as well as corresponding signaling containing information about the measurement of the discharge of the streamflow, based upon a respective distance between each station in relation to the projection or virtual tag line, as well as ADCP signaling and the GPS signaling received, using Differential Global Position System (DGPS) or Real Time Kinematic GPS (RTK GPS).
Owner:YSI INC
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