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1285results about How to "Reduce detection error" patented technology
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A method for detecting and tracking a moving object
InactiveCN109102523ASmall amount of calculationImprove detection accuracyImage enhancementImage analysisObject detectionOptical flow computation
The invention discloses a moving object detection and tracking method. The method comprises the following steps: firstly, obtaining a frame image from a video sequence, converting the image into a gray scale image, and filtering and denoising are performed; then, the moving target region is obtained by using three-frame difference method, and the hole in the difference image is filled by morphological filter closure operation; the pixel points with non-zero gray value in the image after morphological filter closure operation are calculated by optical flow calculation, and the moving target isextracted; then the Kalman filtering algorithm is used to predict the centroid position of the moving object in the current frame image, the predicted value is compared with the centroid position tracked by a Camshift algorithm, and the centroid coordinates of the moving object are determined by the comparison results, and the size and position of the search window are determined when searching the next frame image; the model is updated to get the next frame image, the whole tracking process is repeated, and finally target tracking is achieved. The invention reduces the error of moving targetdetection and tracking, and improves the accuracy.
Owner:NANJING UNIV OF SCI & TECH
Traffic state detecting method based on multi-data fusion
ActiveCN109410586AImprove road coverageBig amount of dataDetection of traffic movementCluster algorithmMatch algorithms
The invention discloses a traffic state detecting method based on multi-data fusion. On the basis of a clustering algorithm, GPS track segmentation is carried out on taxi GPS data and mobile phone GPSdata respectively based on users to obtain all taxi GPS segmentation tracks and mobile phone GPS segmentation tracks; with the taxi GPS segmentation tracks as training samples, an identification model is constructed and similar taxi GPS segmentation tracks are extracted in the mobile phone GPS segmentation tracks; on the basis of a map matching algorithm, the taxi GPS segmentation tracks and thesimilar taxi GPS segmentation tracks are matched to road sections in an urban road network; with a matching result of the two kinds of tracks, vehicle driving speeds at the corresponding road sectionsare calculated respectively; and according to an evidence theory, the vehicle driving speeds, calculated respectively based on the matching result of the two kinds of tracks, of the road section arefused and the vehicle driving speed of the road section is estimated. Therefore, the urban road traffic state information is detected accurately.
Owner:CENT SOUTH UNIV
Smoke gas on-line monitoring system and smoke gas on-line monitoring method
ActiveCN104407161AAnalysis and detection are accurateStable flow rateMaterial analysisGas analysisParticulates
The invention relates to a smoke gas on-line monitoring system and a smoke gas on-line monitoring method, and aims at providing the smoke gas monitoring system and the monitoring method which have the advantages of being simple in structure, high in automation degree and accurate in monitoring. The system comprises a pitot pitometer, a smoke gas sampler, a particulate matter monitor, sampling pipelines and demarcating pipelines, wherein the pitot pitometer, the smoke gas sampler and the particulate matter monitor are all provided with anti-purging devices, signal receiving terminals of all the anti-purging devices are respectively connected with a central controller, and all the anti-purging devices are controlled by the central controller to regularly purge. Smoke gas collected by the smoke gas sampler successively passes through a first refrigerator, a gas filter, a second refrigerator and a membrane type filter, the collected smoke gas is cooled and filtered by the first refrigerator, the gas filter, the second refrigerator and the membrane type filter, and the rest smoke gas finally obtained is fed into a multicomponent gas analysis instrument to be analyzed and detected. For the system, whole calibrated pipelines and partial calibrated pipelines are also arranged, so that the analysis instrument in a line can be wholly calibrated and partially calibrated.
Owner:汇众翔环保科技股份有限公司
Apparatus and method for remotely measuring subgrade settlement by laser
InactiveCN101373132AAvoid manual errorHigh measurement accuracyRoadwaysUsing optical meansOptical measurementsPhotovoltaic detectors
The invention relates to a device and a method for remotely measuring subgrade settlement by utilizing a laser and belongs to the technical field of optical measurement and geometric position measurement. The device of the invention comprises a settlement monitoring pile consisting of a bottom plate (501) and a measuring rod (502), a point light (1), a fixed observation pile (6), a laser measuring unit (2), a measuring signal transmission unit (3), a central processing unit (7) and power supply modules (401 and 402). The method comprises the following steps: the settlement monitoring pile is buried in a point to be measured and the point light is arranged on the settlement monitoring pile, so that the point light and the subgrade of the point to be measured settle synchronously; the point light is imaged through a lens (201) of the laser measuring unit, and an image point A'is positioned on a photoelectric detector (202); and the displacement of the object point of the light can be calculated through the displacement of the image point, that is, the subgrade settlement amount of the point to be measured. The invention has high measurement precision, can implement the settlement measurement in the construction process or after the construction, and the remote settlement measurement of any positions and any depth of a subgrade.
Owner:BEIJING JIAOTONG UNIV
MicroRNA quantitative detection analytic method by utilizing isothermal amplification to synthesize fluorescent nano silver cluster probe
The invention provides a microRNA quantitative detection analytic method by utilizing isothermal amplification to synthesize a fluorescent nano silver cluster probe. The method is as below: a DNA amplification template containing three kinds of functional sequences is designed: a sequence binding with a target microRNA, a nicking endonuclease enzyme sequence and a DNA complementary sequence for synthesis of fluorescent nano cluster; when the target microRNA and the DNA amplification template are combined, isothermal amplification reaction and specific enzyme reaction of nicking endonuclease are induced to obtain a large number of single-stranded DNA products; the DNA sequence for synthesis of fluorescent nano silver cluster and a silver nitrate solution are employed to prepare the fluorescent nano silver cluster probe under the reduction of sodium borohydride; fluorescence signal of the reaction system are determined, and a fluorescence change value is calculated; the value is compared with a standard working curve to calculate the concentration of the target microRNA. The method has the advantages of high sensitivity, strong specificity, wide linear detection range, low background signal and simple operation, and can be widely applied to microRNA detection of biological samples such as tissue, blood or cells.
Owner:EAST CHINA UNIV OF SCI & TECH
Self-learning method and device of hybrid electric vehicle and clutch of hybrid electric vehicle
InactiveCN104565127AGuaranteed operational reliabilitySimple self-learning methodClutchesComputer moduleElectric vehicle
The invention provides a self-learning method and a self-learning device of a hybrid electric vehicle and a clutch of the hybrid electric vehicle, which can automatically finish self-learning of a key position of the clutch so as to simplify an adjusting process. The self-learning method comprises the following steps: judging whether a self-learning condition is met or not; if so, controlling the clutch to be separated and combined; recording positions where the clutch is completely separated, is completely combined and starts to slide and wear, and taking the positions as a complete separation point, a complete combination point and a sliding and wearing point. The self-learning device comprises a position sensor which is in signal connection with a controller, wherein the controller is provided with a judging module for judging whether the self-learning condition is met or not, and controlling the separation and combination of the clutch when the self-learning condition is met, so that the self-learning of the complete separation point, the complete combination point and the sliding and wearing point are realized; the position sensor is used for detecting the position of the clutch and transmitting position information to the controller; the controller is provided with a storage module for storing the position information.
Owner:WEICHAI POWER CO LTD
Device and method for detecting wind pressure
ActiveCN102192808AReduce detection errorControl dischargeFluid heatersFluid pressure measurement by electric/magnetic elementsEngineeringTurbine
The invention provides a device for detecting wind pressure, which comprises a temperature collecting module (10), a wind turbine module (20), an electric current detecting module (30), a control module (40) and a storage module (50). The invention provides a method for detecting the wind pressure, which comprises the steps of: detecting the environmental temperature of the wind pressure detecting device, the current rotating speed of a wind turbine and the electric current of the wind turbine; carrying out temperature compensation on the electric current of the wind turbine according to the environmental temperature; and judging whether current external wind pressure generates wind obstruction according to the value of the wind turbine electric current subjected to the temperature compensation, a prestored value of the wind turbine electric current being subjected to the temperature compensation and corresponding to the current rotating speed of the wind turbine and rated electric current capacity quantity of the wind pressure corresponding to the current rotating speed of the wind turbine. By means of the device and method for detecting wind pressure, disclosed by the invention, wind pressure detection errors brought by the influence of the environmental temperature on the electric current of the wind turbine can be reduced.
Owner:HAIER GRP CORP +1
Roller washing machine and inertia detection method and device thereof
ActiveCN103966799AReduce detection errorEliminate detection errorsOther washing machinesControl devices for washing apparatusControl theoryElectromagnetic torque
Owner:GUANGDONG WELLING ELECTRIC MACHINE MFG +1
Dark channel experience and minimal image entropy based traffic smog visibility detection method
ActiveCN105931220ASmall amount of calculationReduce detection errorImage enhancementImage analysisVisibilityFeature extraction
The invention relates to a dark channel experience and minimal image entropy based traffic smog visibility detection method. In an image feature extraction module, dark channel experience processing is carried out on an image I to be detected to obtain a rough estimated value of the air transmittance, a guiding and filtering edge smoothing operator is used to smooth and refine the rough estimated value of the transmittance, and depth information of each pixel point is obtained; in a road area extraction module, a road area is extracted from the image I in an area growth method, and area growth comprises the steps including setting an initial seed point, setting a target growth area, calculating the minimum of adjacent gray scale difference, determining whether a target pixel belongs to the road area and updating the seed point; and in a visibility estimation module, the minimal image entropy of the area is calculated, an optimal value of the extinction coefficient is obtained, and the smog visibility is estimated effectively. The detection method has the advantages that a target interest area extraction step is added to an image entropy solving process, the computation amount is reduced, and the operation speed and robustness are improved.
Owner:NANJING UNIV OF POSTS & TELECOMM
Method for optimizing laser radar detection atmospheric composition spectral line analysis
ActiveCN106526614AHigh precisionIncrease credibilityElectromagnetic wave reradiationICT adaptationRadar equationCo2 absorption
The invention provides a method for optimizing laser radar detection atmospheric composition spectral line analysis, through building of an IPDA laser radar equation of hard target reflection, calculation of difference optical thickness of two pulses and CO2 air column mixing rate XCO2 with a weight, single spectral line broadening calculation, absorption cross section calculation, CO2 absorption optical thickness calculation, a weight function profile and a CO2 molecule number density profile, weight function-optimized spectral lines are obtained. The spectral lines obtained by the method have a higher lower-atmosphere weight ratio, and detection is closer to a true value.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Inversion method of micro-pulse differential absorption lidar water vapor spatial and temporal distribution
ActiveCN103293117AReduce mistakesLow costColor/spectral properties measurementsInversion methodsWater vapor absorption
The invention discloses an inversion method of micro-pulse differential absorption lidar water vapor spatial and temporal distribution. The inversion method comprises wavelength selection of water vapor detection, calculation and correction of absorption cross sections of water vapor absorption wavelengths and non-absorption wavelengths, and inversion and calibration of water vapor concentrations. An automatic continuous detection device of the micro-pulse differential absorption lidar water vapor spatial and temporal distribution is employed to obtain characteristic backward scattering signals of water vapor absorption in specific spectral lines, the backward scattering signals are subjected to inversion and calibration by a computer utilizing a differential absorption spectrum analysis method, and high-time-resolution, high-spatial-resolution and high-precision water vapor stereo distribution data is obtained.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Singly labeled oligonucleotide fluorescent probe and method for detecting nuclease
ActiveCN102154489ASimple and fast operationDesign and synthesis cost reductionMicrobiological testing/measurementFluorescenceSide chain
The invention discloses a singly labeled oligonucleotide fluorescent probe and a method for detecting nuclease. The singly labeled oligonucleotide fluorescent probe has a stem loop structure, wherein a loop part consists of 5-24 nucleotide residues; a stem part is in a hydrolysis mode or a synthesis mode according to the activity of nuclease to be detected; in the hydrolysis mode, the stem part has a double-chain structure, the tail end is provided with at least three continuous G-C base pairs, the C base ends are labeled with fluorescence groups, the G base ends have quenching effects, one chain of the stem part is hydrolyzed under the action of the nuclease to release a fluorescence signal; and in the synthesis mode, the stem part consists of a section of double chains and a 5'-(dC)4-8side chain, the 5'- end is labeled with a fluorescence group, the 3'- end reacts with the nuclease, 4-8 continuous guanine deoxyribonucleotides are produced by polymerization extension, the fluorescence group at the 5'- end is quenched, and the activity of the nuclease to be detected is analyzed according to the change condition of the fluorescence signal.
Owner:PEKING UNIV
Atmosphere profile inversion method based on foundation hyperspectral microwave radiometer
InactiveCN103792538AAdaptableAccurate calculationRadio wave reradiation/reflectionICT adaptationBrightness temperatureMicrowave radiometer
The invention provides an atmosphere profile inversion method based on a foundation hyperspectral microwave radiometer, and belongs to the technical field of microwave remote sensing. The atmosphere profile inversion method based on the foundation hyperspectral microwave radiometer comprises the following steps of setting system parameters of the foundation hyperspectral microwave radiometer, acquiring background parameters and background field errors, establishing a radiation transfer model, determining atmospheric radiation transmission brightness temperature, and inverting an atmosphere profile by using the iterative process of a variational method. Through the utilization of the atmosphere profile inversion method based on the foundation hyperspectral microwave radiometer, the accurately inverted atmosphere profile can be obtained through the foundation hyperspectral microwave radiometer, and the atmosphere profile inversion method is especially suitable for multi-channel radiometers and detection situations of insufficient prior data, enables a large amount of frequency band information provided by the foundation hyperspectral microwave radiometer to be used completely, and has strong adaptability and small detection errors.
Owner:BEIHANG UNIV
Voltage sag detection method for S-transformation on basis of time-frequency gathering characteristic criteria
InactiveCN103995178AProof of feasibilityReduce detection errorSpectral/fourier analysisVoltage-current phase angleTransient stateVoltage sag
The invention discloses a voltage sag detection method for S-transformation on the basis of time-frequency gathering characteristic criteria. The method includes the first step of obtaining voltage sag disturbance signals to be detected generated in a power distribution network, the second step of conducting analog-digital conversion on an obtained voltage sag disturbance signal model, the third step of conducting optimized selection on gaussian time-frequency window width adjustment parameters in an improved S-transformation method according to time-frequency gathering characteristic criteria, substituting the gaussian time-frequency window width adjustment parameters selected according to empirical values, and conducting characteristic extraction, detection and analysis on digital signals to be detected in the second step through the improved S-transformation. Selection of condition parameters of a gaussian window function is optimized through the constraint condition that the value of a time-frequency gathering characteristic expression is maximized when the signals are analyzed through the improved S-transformation, and the improved S-transformation is applied to characteristic extraction, detection and analysis on voltage sags. The voltage sag detection method for S-transformation on the basis of time-frequency gathering characteristic criteria has the higher detection accuracy degree and signal denoising capacity on transient-state electric energy quality signals.
Owner:JIANGSU UNIV
Detection device of view field angle of optical instrument and detection method
InactiveCN106441212AGood repeatabilityHigh precisionAngle measurementTesting optical propertiesCamera lensOptical instrument
The invention discloses a detection device of a view field angle of an optical instrument and a detection method. The detection method comprises the following steps: displaying a target image on a display screen; imaging the target image through a detected optical instrument; acquiring an image of the detected optical instrument through an image acquisition module; determining the view field angle of the detected optical instrument by an upper computer according to the received image acquired by the image acquisition module and a working distance between a display surface of the display screen and a camera lens of the detected optical instrument. According to the detection device and the detection method, provided by the embodiment of the invention, the image of the target image of the detected optical instrument is acquired through the image acquisition module, and the view field angle of the detected optical instrument is determined according to the image by the upper computer, and observation and alignment do not need to be carried out by human eyes; a plurality of times of detection can be carried out and the repeatability is high; compared with a human eye detection method, the detection device and the detection method have relatively high precision and detection errors are reduced.
Owner:BOE TECH GRP CO LTD +1
Supporting system for machining of large-caliber space optical reflectors
InactiveCN101887160AReduce detection errorGuaranteed machining accuracyMountingsSupporting systemActive support
The invention discloses a supporting system for the machining of large-caliber space optical reflectors, which comprises a machining supporting device, a detection supporting device and a conversion mechanism (2), wherein the conversion mechanism is arranged on the upper surface of a machining supporting bottom plate (1), and supports the detection supporting device; the bottom plate of a detection supporting frame (8) is provided with a floating active supporting mechanism (6), a rigid supporting rod penetration hole (4) and a counter weight penetration hole (7); a rigid supporting rod (3) supports a work piece through the rigid supporting rod penetration hole in the machining of the reflector; and in detection, the conversion mechanism holds the detection supporting device up and the floating active supporting mechanism supports the work piece. By adopting a supporting way and a supporting structure which are mutually independent and adjustable, the supporting system can design schemes and accurately regulate supporting forces at each supporting point according to own characteristics of the reflectors to be machined, and also can regulate surface shape errors, caused by gravity deformation, of the reflectors to be acceptable for space usage, thereby greatly reducing ground detection errors.
Owner:SUZHOU UNIV
Method and device for detecting precise arrival moment of ultrasonic wave
InactiveCN102636252AAvoid the effect of signal amplitudeReduce detection errorSubsonic/sonic/ultrasonic wave measurementUsing electrical meansDecision thresholdLine fitting
The invention relates to a method and a device for detecting the precise arrival moment of an ultrasonic wave, and the method and the device are suitable for the application field of the high-precision ultrasonic detections, such as distance measurement, target tracking and positioning and flow detection. The method is based on a digital processing technology, and comprises the following steps: utilizing an A / D (analog to digital) converter to collect ultrasonic data, dynamically determining decision threshold levels reached by ultrasonic signals according to the characteristics of ultrasonic waveforms, and accurately calculating the arrival moment of the ultrasonic wave by utilizing a linear fitting method. The detection on the nanosecond stage precision can be realized through simple research and arithmetical operation at the low sampling rate. The invention provides the detection method with low calculation amount and high precision for high-precision ultrasonic detections, such as distance measurement, target tracking and positioning and flow detection.
Owner:JILIN UNIV
Exposure time determination-based laser speckle blood flow imaging method
InactiveCN103330557AImprove accuracyAutomatic determination of exposure timeDiagnostic recording/measuringSensorsImage theorySelf correlation
The invention relates to an exposure time determination-based laser speckle blood flow imaging method, which comprises the following steps of building a laser speckle blood flow imaging system, then, inputting the imaging of a detected object into a computer by a charge coupled device (CCD) camera according to exposure time T, and selecting a target detection point; continuously collecting n frame images from the target detection point by the CCD camera respectively according to the exposure time T1, T2,?-, Tm to obtain m image sets P<T1>(n), P<T2>(n),?- P<Tm>(n), and inputting into the computer for processing; calculating the image gray value contrast K(x, y, Ti) under different exposure time Ti by the computer according to a formula; obtaining a fitted value A<fit> of a reciprocal A of Tao<c> by calculating and fitting a relation between the square of the contrast K2(x, y, Ti) and the exposure time Ti of the CCD camera and the self-correlation function fall time of scattering light-intensity variation Tao<c> according to the laser speckle blood flow imaging theory; and setting the exposure time T0=1.1 / A<fit> and performing blood flow detection on the detected object to obtain blood flow velocity distribution. According to the exposure time determination-based laser speckle blood flow imaging method provided by the invention, according to the blood flow velocity of different detected objects, the exposure time of the CCD camera is automatically determined, and the accuracy of the laser speckle blood flow imaging method monitoring blood flow variation is improved.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Object detector, object detecting method and robot
InactiveUS7532743B2Reduce detection errorIncrease volumeImage analysisCharacter and pattern recognitionTemplate matchingSupport vector machine
An object detector, an object detecting method and a robot can reduce diction errors of detecting wrong objects without increasing the volume of the computational operation to be performed to detect the right object. A face detector 101 comprises a face detecting section 110 that operates like a conventional face detecting section and is adapted to roughly select face candidates from an input image by template matching and detect face candidates by means of a support vector machine for face recognition, a non-face judging section 120 that detects non-face candidates that are judged to be non-faces and removes them from the face candidates selected by the face detecting section 110 and a skin tracker section 114 for tracking a face region after the non-face judgment. When the assumed distance between the face detector and the face as computed from the input image and the measured distance as measured by a distance sensor show a large difference, when the color variance of the face candidate is small, when the occupancy ratio of the skin color region is large and when the change in the size of the face region is large after the elapse of a predetermined time, the non-face judging section 120 judges such face candidates as non-faces and removes them from the face candidates.
Owner:SONY CORP
Pressure detecting apparatus having solenoid valve and pressure sensor
InactiveUS20050204732A1Reduce detection errorReduce detectionOperating means/releasing devices for valvesInternal combustion piston enginesSolenoid valveAir pump
A secondary air pressure detecting apparatus includes a solenoid valve and a pressure sensor. The solenoid valve defines a secondary air passage that introduces secondary air from the air pump into the exhaust system of an engine. The solenoid valve opens and closes the secondary air passage. The pressure sensor is integrally mounted to the solenoid valve to detect pressure of secondary air in the solenoid valve. The solenoid valve includes a coil assembly and magnetic members. The coil assembly includes a solenoid coil that generates magnetic force when the solenoid coil is energized. The magnetic members construct a magnetic circuit with the solenoid coil. The magnetic circuit is arranged outside of the secondary air passage. The pressure sensor is arranged on an opposite side of the secondary air passage with respect to the magnetic circuit.
Owner:DENSO CORP
Microfluidic chip and single cell protein quantitative detection device and method
InactiveCN107064091ARealize high-throughput quantitative detectionAvoid the impact of test resultsLaboratory glasswaresBiological testingFluorescenceSingle-cell protein
The invention provides a microfluidic chip and a single cell protein quantitative detection device and method. The chip is composed of a PDMS (Polydimethylsiloxane) layer and a quartz layer; a microfluidic chip technology is combined with a liquid drop formation technology, a fluorescence antibody preparation technology and a fluorescence detection technology and then high-throughput quantitative detection of proteins in single cells is realized; reliable device and method are provided for characterization of cell biological characteristics. By designing and manufacturing a fluorescence antibody pair and setting an optical filter, the detection precision can be effectively improved and detection errors are reduced. Equipment including an inverted fluorescent microscope, a photomultiplier and the like can be used in a traditional biological laboratory, so that the device and the method have strong adaptability and high portability and are convenient to realize.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI +2
Mobile positioning method and radio network controller
ActiveCN102045840AReduce detection errorHigh positioning accuracyWireless communicationAngle of arrivalReal-time computing
The invention provides a mobile positioning method and a radio network controller. The method comprises the following steps of: receiving multiple time advance (TA) values reported by user equipment (UE) and multiple angle of arrival (AOA) values and multiple time deviation (TDEV) values reported by a NodeB in a positioning period; selecting a TA detection algorithm and an algorithm threshold according to the environment of the Node B; calculating the TA detection value according to the multiple TA values, the selected TA detection algorithm and the selected algorithm threshold; and calculating the position information of the UE according to the TA detection value, the multiple AOA values and the multiple TDEV values. The mobile positioning method can effectively improve the positioning precision.
Owner:CHINA MOBILE GRP GUANGDONG CO LTD +1
Lever-amplification-principle-based dual-shaft full-decoupling silicone micro-resonator type accelerometer
InactiveCN104865406AHigh sensitivityReduce areaAcceleration measurement using interia forcesAcceleration measurement in multiple dimensionsAccelerometerCoupling
The invention discloses a lever-amplification-principle-based dual-shaft full-decoupling silicone micro-resonator type accelerometer comprising an upper layer and a lower layer. A mechanical structure of a silicone micro accelerometer is arranged at the upper layer and a glass substrate laid with a signal lead is arranged at the lower layer. The mechanical structure is formed by a sensing mass, a common anchor point, lever amplifier mechanisms, decoupling beams, and resonators; one end of one decoupling beam is connected with the sensing mass and the other end is connected with the common anchor point by the lever amplifier mechanisms; and the inertia force applied to the sensing mass is magnified by the lever amplifier mechanisms and then is transmitted to the resonators. The resonators consist of resonance beams, comb racks, movable combs, fixed drive combs, fixed drive feedback combs, and fixed anchor points. According to the silicone micro-resonator type accelerometer, accelerated speed detection at two directions in a plane can be realized; and the frequency is used as an output. The accelerometer has advantages of small size, high integration degree, small coupling error, high sensitivity, and excellent anti-interference capability and the like.
Owner:SOUTHEAST UNIV
Algae recognition measurement sensor and method
ActiveCN102279174AReal-time detectionQuick checkFluorescence/phosphorescenceGratingAdditive ingredient
The invention discloses an alga identification and measurement sensor and method. The sensor comprises a multi-wavelength high-brightness LED (light-emitting diode) excitation light source, an optical lens, an optical filter, a light-splitting optical grating, a photoelectric detection unit consisting of a plurality of photoelectric detectors with different detecting wavelengths and an electronic circuit system and the like which are in integrated arrangement, and meanwhile, an ultrasonic generator, a temperature sensor and a mechanical cleaning device and the like are integrated in the sensor. In the method, a multi-wavelength fluorescence detection technology is adopted and information, such as alga ingredients and concentration and the like in a water body is obtained through measuring an excitation spectrum of the alga in the water body and carrying out corresponding calculation. According to the invention, the multi-wavelength fluorescence detection technology is adopted, the problem of detection error caused by Redshift can be effectively solved and the actual excitation fluorescence spectrum and the alga information can be effectively reflected. The alga identification and measurement sensor and method are particularly suitable for long-term monitoring and on-site real-time, fast and accurate measurement of alga in water body environments.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Automatic continuous detection device of micro-pulse differential absorption lidar water vapor spatial and temporal distribution
ActiveCN103293116AImprove stabilityImprove reliabilityColor/spectral properties measurementsDifferential absorption lidarOptical path
The invention discloses an automatic continuous detection device of micro-pulse differential absorption lidar water vapor spatial and temporal distribution. The device comprises dual wavelength detection light sources, a lidar receiving optical system, a signal detection system, a three dimensional rotating platform, a transient recorder, an automatic temperature and humidity recorder and the like. The wavelengths of the two detection light sources are respectively positioned on a water vapor absorption peak and a water vapor non-absorption peak, the detection light can be transmitted into atmosphere at any angle, water vapor absorption characteristic backward scattering signals in specific spectral lines are obtained, water vapor distance-distinguished relative humidity profiles in transmission paths of light are obtained by inversion, and after profiles being calibrated, high-resolution and high-precision water vapor relative humidity spatial and temporal distribution data in light paths is finally obtained. The automatic continuous detection device can carry out day and night all-weather observation for water vapor relative humidity stereo distribution, and has advantages of high time resolution, high spatial resolution and high detection precision.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Road edge detection method based on three-dimensional laser radar
PendingCN109738910AReduce the difficulty of curb detectionWide applicabilityElectromagnetic wave reradiationPoint cloudFeature extraction
The invention belongs to the field of traffic road environment sensing in the intelligent automobile technology, and relates to a road edge detection method based on three-dimensional laser radar, comprising the following steps: acquiring point cloud data of the surrounding road environment by using the three-dimensional laser radar installed on the vehicle, adopting a random sampling consistencyalgorithm to segment the ground; setting a wider threshold according to various geometric features of the road edge for judgment, and extracting the candidate points of the road edge by using the neighborhood relationship between the respective scanning points of the same scanning layer; clustering the candidate points of the road edge and removing the dense and isolated noise points by using a density-based clustering algorithm according to the continuous feature about density and rod direction of the data points of the road edge; and finally fitting the qualified candidate points of the roadedge by weighted least squares to improve the fitting accuracy. The method extracts candidate points of the road edge according to the plurality of features of the road edge, and comprehensively considers the continuous feature of the road edge in the density and the road direction to de-noise, so that the final detection error is small and the precision is high.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Threaded hole detection equipment
InactiveCN102759312AImprove detection efficiencyReduce detection errorPlug gaugesMechanical measuring arrangementsTransmission delayEngineering
The invention discloses threaded hole detection equipment, which comprises a housing, a base, detachable detection devices symmetrically and fixedly arranged on the base, and a positioning device used for fixing the to-be-detected work pieces, wherein each detection device comprises a die bottom plate, a slide rail fixedly arranged on the die bottom plate, a motor group, and a transmission device for driving the motor group to move on the slide rail; the motor group comprises at least one motor and a thread gauge arranged at the front end of the motor, and the number of the motor is consistent with that of the slide rail; and a control device for controlling the operation of the detection devices is further arranged on the equipment. By adopting the threaded hole detection equipment disclosed by the invention, the detection efficiency can be effectively improved and detection errors can be effectively reduced; and as the detection equipment is electrically controlled, the workload can be effectively reduced and the detection cost can be cut.
Owner:YUANTAI AUTOMATION TECH SUZHOU
Method for measuring horizontal visibility based on CCD (Charge Coupled Device) laser radar
ActiveCN102621102AImprove photoelectric conversion efficiencyImprove time resolutionScattering properties measurementsCcd cameraEcho signal
The invention discloses a method for measuring atmospheric horizontal visibility based on a CCD (Charge Coupled Device) laser radar. The method involves the following devices: a laser transmitting part, an optical receiving part and a data collecting part, wherein the laser transmitting part comprises a laser device and a collimator; the optical receiving part mainly comprises a CCD camera and an optical filter, and the optical filter is positioned in front of a lens of the CCD camera; the data collecting part comprises a computer, and the CCD camera is in communication connection with the computer; and the laser device is used for transmitting laser to the atmospheric air horizontally, a laser path is free from blocking objects, a micro angle is formed between the CCD camera and the laser device, laser echo signals are fully received by the CCD camera, and the atmospheric horizontal visibility can be obtained after laser echo images are collected and processed by the computer. According to the invention, the devices involved in the method can continuously work day and night and have the advantages of high detecting speed, simple structure, small size, light weight, convenience for carrying and moving and wide application prospect.
Owner:ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Vehicle detection and tracking method and device
ActiveCN105469052AReduce detection errorImprove accuracyCharacter and pattern recognitionModel networkVehicle detection
The invention provides a vehicle detection and tracking method and device. The method includes the following steps that: vehicle images which are shot currently are detected, so that the vehicle characteristics of the vehicle images can be obtained; one group of models which are suitable for the sizes of the vehicle images are selected from a pre-trained multi-model network structure; vehicle detection is performed on the vehicle characteristics through the selected models, so that the position information of vehicles in the vehicle images can be obtained; and the vehicles in the vehicle images are tracked according to the obtained position information of the vehicles. With the vehicle detection and tracking method and device provided by the invention adopted, the accuracy of vehicle positioning can be improved, so that vehicle tracking speed can be also improved.
Owner:NETPOSA TECH
Displacement measurement device
InactiveUS20130314077A1Reduce detection errorReduce detectionUsing electrical meansStray field compensationMeasurement deviceClassical mechanics
The displacement measurement device according to the present invention includes: a metal object movable in a moving direction within a moving plane; a measurement coil arranged such that an opposite area of a measurement coil surface opposite to the moving plane is varied with a movement of the metal object; and a correction coil arranged such that an opposite area of a correction coil surface to the moving plane is not varied irrespective of the movement of the metal object. The measurement coil and the correction coil are arranged such that the measurement coil surface and the correction coil surface are not overlapped with each other with regard to a plane parallel to the moving plane but a range occupied by the measurement coil in a coordinate axis along the moving direction and a range occupied by the correction coil in the coordinate axis are overlapped with each other.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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