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83results about How to "Eliminate detection blind spots" patented technology
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Integrated bridge detection method based on unmanned aerial vehicle
InactiveCN109444171ARealize automatic collectionFully automatedMaterial analysis by optical meansSatellite radio beaconingTerrainInformation processing
The invention relates to an integrated bridge detection method based on an unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicle bridge detection. The method includesthe following steps: step I. acquiring detected bridge body and surrounding terrain environment data by an unmanned aerial vehicle A, and returning the data to a ground comprehensive information processing control system; step II. generating, by a 3D coordinate modeling system, a 3D coordinate model of the bridge body and the surrounding terrain environment; step III. establishing, by an unmannedaerial vehicle cruise path planning system, an autonomous cruise path of an unmanned aerial vehicle B, and sending the autonomous cruise path to the unmanned aerial vehicle B; step IV. executing, by the unmanned aerial vehicle B, autonomous cruise path to acquire and return the image of the bridge body; step V. detecting a bridge surface defect and identifying, by a marking system, the defect partof the bridge surface, calculating the defect degree of the defect part, and marking the defect part; step VI. automatically generating, by a bridge quality detection report generation system, a bridge quality detection report. The full automation of the bridge detection process is realized, the detection efficiency is greatly improved, and the detection quality is improved.
Owner:SHANDONG UNIV OF TECH +1
Atomic magnetic sensor for magnetometer and method of removing detection dead zones of magnetometer
ActiveCN104698410AImprove reliabilityEliminate detection blind spotsMeasurements using magnetic resonancePhotovoltaic detectorsOptical pumping
The invention provides an atomic magnetic sensor for a laser optical pump magnetometer. The atomic magnetic sensor includes two round-trip optical loops and an atomic absorption chamber in the third direction, wherein the round-trip optical loops and the atomic absorption chamber are arranged on a laser optical path in sequence, and the two round-trip optical loops are spatially perpendicular to each other. Each optical loop is provided with an optical shaft and includes an atomic absorption air chamber used for converting a beam of laser perpendicular to the direction of the optical shaft to circularly polarized light spreading in the direction of the optical shaft and enabling the circularly polarized light to be perpendicular to the direction of the optical shaft again after conducting optical pumping on atoms in the atomic absorption chamber. The atomic magnetic sensor further includes a photoelectric detector, wherein an optical signal is converged to the photoelectric detector through the three round-trip optical loops spatially perpendicular to each other and the atomic absorption chamber in the third direction and is converted to an electric signal. The atomic magnetic sensor can remove the dead zone of the laser optical pump magnetometer in magnetic detection and meanwhile achieves highly sensitive measurement of magnetic field. The invention further provides a method of removing the detection dead zone of the magnetometer.
Owner:PEKING UNIV
Networking navigation radar target tracking system based on data fusion
InactiveCN105572664AFlexible and easy to receiveImprove accuracyRadio wave reradiation/reflectionTransceiverData acquisition
The invention discloses a networking navigation radar target tracking system based on data fusion. The system comprises at least one radar front end, at least one radar terminal and an Ethernet. The radar front end and the radar terminal are in bidirectional data transmission through the Ethernet. The radar front end comprises an antenna, a transceiver, a data acquisition module, a signal preprocessor module and a control command processing module. The radar terminal comprises a display unit, a signal processing unit and a control unit. The transceiver generates radio-frequency pulses which are radiated to the space through an antenna. The system belongs to a trace point serial processing centralized data fusion structure, has the features of high fusion precision and small system time delay, and meanwhile, has the advantages of eliminating detection blind areas, improving detection probability and improving tracking performance. After the terminal carries out data fusion and comprehensive optimization processing on the data of the plurality of front ends, the problem of blind area of the single radar due to antenna erection location can be effectively solved, marine target detection and tracking accuracy performance is improved, and navigation safety is guaranteed.
Owner:上海广电通信技术有限公司
Integrated bridge detection system based on unmanned aerial vehicles
ActiveCN109060281AImprove detection efficiencyImprove detection qualityOptically investigating flaws/contaminationPosition/course control in three dimensionsInformation processingTerrain
The invention relates to an integrated bridge detection system based on unmanned aerial vehicles and belongs to the technical field of unmanned aerial vehicle bridge detection. The system comprises abridge modeling unmanned aerial vehicle A, a bridge surface data collection unmanned aerial vehicle B and a ground integrated information processing control system. The ground integrated information processing control system comprises a 3D coordinate modeling system, an unmanned aerial vehicle cruising route planning system, a bridge deck defect detection and marking system, and a bridge quality detection report generation system. The unmanned aerial vehicle A is used for photographing a detected bridge and a surrounding terrain environment. The 3D coordinate modeling system is used for establishing 3D coordinate models of a bridge body and the surrounding terrain environment. The unmanned aerial vehicle cruising route planning system is used for planning a cruising route of the unmanned aerial vehicle B. The bridge deck defect detection and marking system is used for detecting defects of corresponding locations of a bridge deck, computing defect level indexes and marking the defect level indexes in the model. According to the system, full automation of a bridge detection process is realized, detection efficiency is greatly improved, and detection quality is improved.
Owner:SHANDONG UNIV OF TECH +1
Mobile robot
PendingCN107175645AEliminate detection blind spotsImprove user experienceProgramme-controlled manipulatorClose rangeAmbilight
The invention discloses a mobile robot, and relates to the technical field of robots. The mobile robot comprises a body, and wheels, a motor, a first image acquisition device, a photoelectric sensor, a supplement light and a processor which are arranged on the body, wherein the wheels are driven by the motor to drive the mobile robot to move on the ground; the first image acquisition device is used for acquiring environment images; the processor is used for performing data processing on the environment images through a preset method, controlling the motor to perform obstacle avoidance action when identifying obstacles in the environment images, eliminating close-distance detection dead zones, and improving user experience; the photoelectric sensor is used for detecting environment illumination intensity; and the processor is further used for controlling the supplement light to give out light when environment illumination intensity is smaller than or equal to a preset threshold value, so that illumination intensity in the visual range of the first image acquisition device is improved, the first image acquisition device conveniently shoots enough bright environment images, and detection success rate is increased.
Owner:SHENZHEN XILUO ROBOT CO LTD
Fiber distributed sensing method and device based on multi-wavelength double light pulses
ActiveCN108507662ANo increase in signal processing workloadReduce the effects of measurement noiseSubsonic/sonic/ultrasonic wave measurementUsing wave/particle radiation meansFiberUltrasound attenuation
The invention discloses a fiber distributed sensing method and device based on multi-wavelength double light pulses, and the method comprises the following steps: S1, generating multi-wavelength double light pulses and injecting the multi-wavelength double light pulses into a sensing fiber, each of the multi-wavelength double light pulses comprising a plurality of wavelength components; S2. obtaining a Rayleigh optical signal in the sensing fiber, and the interference light intensity of the sensing channel corresponding to the Rayleigh optical signal; S3, calculating the interference light intensity to obtain phase information of the Rayleigh optical signal, thereby obtaining information of the signal sensed by the sensing fiber. The method and device use the [phi]-OTDR technology which can be used for the PGC-based phase demodulation technology, reduces the influence of the Rayleigh fiber signal intensity attenuation on the measurement noise without increasing signal processing workload, and eliminates the detection dead zone caused by a high phase noise.
Owner:NAT UNIV OF DEFENSE TECH
Bidirectional active power disturbance island detection method
InactiveCN102879672AEliminate detection blind spotsReduce harmonic contentElectrical testingIslandingCoupling
The invention discloses a bidirectional active power disturbance island detection method. The method comprises the following steps of: adding the disturbance quantity of positive and negative delta I into grid-connected current; calculating an absolute value of difference between Uold and Unew; comparing the absolute value of the difference between the Uold and the Unew with a set maximum permissible value of voltage difference between the Uold and the Unew; and if frequency that the absolute value of the difference between the Uold and the Unew is continuously greater than the set maximum permissible value of the voltage difference between the Uold and the Unew is greater than or equal to a set value, detecting an island phenomenon. By adoption of the bidirectional active power disturbance island detection method, the island phenomenon can be timely and effectively detected, and harmonic wave is slightly introduced to a common coupling point.
Owner:CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
Thin surface laser middle and small particle size seed flow sensing device
PendingCN107917723AGo digitalLow costStructural/machines measurementConverting sensor output opticallyEngineeringRadiation shield
The invention belongs to the technical field of agricultural seed particle sensing detection and particularly relates to a thin surface laser middle and small particle size seed flow sensing device, which comprises a seed inlet, a seed guiding pipe, a laser transmitting module, a photoelectric receiver, a seed outlet, a signal acquisition system, a power supply unit and a packaged shell. The seedflow dropping from the seed feeding port of a seed metering device enters a detection area through the seed inlet, a small portion of thin surface laser path irradiating to the photoelectric receiveris sheltered, outputted voltage signals generate disturbance, and thus, digitalization of the seed flow is realized through processing by the signal acquisition system. The sensing device provided inthe invention has high detection accuracy and good economic practicality, and a technical support can be provided for detection on the seed metering performance (sowing, seed metering frequency, missing sowing, qualified index and the like) of a precision seed metering device for middle and small particle size seeds (such as rape, wheat and corn seeds).
Owner:HUAZHONG AGRI UNIV
Laser radar scanning method and laser radar scanning device
The invention discloses a laser radar scanning method and a laser radar scanning device. The method comprises the following steps: when a laser radar scans a target obstacle in a detection area and the length value of the projection of a first scanning light beam emitted by the laser radar on the target obstacle is smaller than a target set value for judging dangerous obstacles, acquiring a shadow area which is formed in the detection area when the target obstacle blocks the first scanning light beam; if the shadow area meets set conditions for accommodating a dangerous obstacle, moving the laser radar by a preset distance; and making the laser radar carry out scanning again at the position to which the laser radar is moved in order to determine whether there is a dangerous obstacle in the shadow area and / or determine whether the target obstacle is a dangerous obstacle. According to the embodiments of the invention, whether there is a dangerous obstacle in a shadow area formed when an obstacle blocks a scanning light beam can be judged, blind spots for detection of special-shaped obstacles in a detection area can be eliminated, and whether a special-shaped obstacle is a dangerous obstacle can be judged.
Owner:BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
Laser radar detection method and laser radar detection device
ActiveCN106872995AEliminate detection blind spotsSolving problems with dangerous obstaclesElectromagnetic wave reradiationLight beamOptoelectronics
The embodiments of the invention disclose a laser radar detection method and a laser radar detection device. The method comprises the following steps: if a target laser radar scans a first target obstacle in a target detection area, judging whether the length value of the projection of a scanning light beam emitted by the target laser radar on the first target obstacle is smaller than a target set value for judging dangerous obstacles; if the length value is smaller than the target set value, acquiring detection data acquired when a laser radar adjacent to the target laser radar scans the target detection area; and determining whether there is a dangerous obstacle in the target detection area based on the detection area. According to the embodiments of the invention, the problem that there is a dangerous obstacle in a shadow area formed when an obstacle blocks a scanning light beam is solved, and blind spots for detection of special-shaped obstacles in a detection area can be eliminated.
Owner:BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
Self-coupled probe mechanism based on parallel passive-type fine adjustment structure
InactiveCN106596731AAchieve self-couplingClose contactMaterial analysis using sonic/ultrasonic/infrasonic wavesRailway vehicle testingSquare cross sectionSupersonic waves
The invention discloses a self-coupled probe mechanism based on parallel passive-type fine adjustment structure, which belongs to the technical field of supersonic wave automatic flaw detection. The self-coupled probe mechanism comprises an installing plate, parallel springs, a connection rack, a probe shell, a S pair, a coupling spring, and a multi-focal probe; the installing plate and a flaw detection host are connected; the parallel spring and the S pair are placed between the installing plate and the connection rack; the connection rack is connected with the probe shell by a screw, and is connected with the installing plate by the S pair, and a set of parallel springs are cooperated; the multi-focal probe with a square cross section is inserted in the square probe shell, the multi-focal probe and the square probe shell enable sliding fit, and the coupling spring is arranged at tail of the probe. While flaw detection is carried out, the probe and a wheel tread are contacted for pressing, movement and swing can be carried out under common effect of the parallel springs, the S pair, and the coupling spring, when the shape of the wheel tread is changed, the probe position and pose is passively adjusted with real time, good coupling can be maximally guaranteed. In addition, an angle-changeable wafer arranged in the probe realize multiple focal length, so that flaw detection on near surface of wheel tread and deeper area can be simultaneously carried out.
Owner:CHANGZHOU UNIV
MPPT-based island detection method
ActiveCN105914777AOvercoming the disadvantages of voltage fluctuationsEliminate detection blind spotsSingle network parallel feeding arrangementsPhotovoltaic energy generationPower qualityVoltage amplitude
The invention, which belongs to the technical field of photovoltaic generating and distributed generating inverter control, relates to an MPPT-based island detection method. A voltage amplitude value of a grid-connected point is affected by disturbance on MPPT; whether an island occurs is determined based on the voltage amplitude value of the grid-connected point; and disturbance on the MPPT is carried out by increasing a duty ratio D of a boost circuit, so that an objective of reduction of the photovoltaic output voltage and power can be achieved. In an off-grid state, with reduction of the photovoltaic output power, the voltage of the grid-connected point is reduced; and when the voltage of the grid-connected point deviates from a normal range, an island state is determined. According to the invention, with fully consideration of an active matching situation of a local load and a distributed photovoltaic generating system, the parameter setting becomes reasonable, the blind detection area is eliminated, the disturbance period setting becomes reasonable, the power loss is reduced, and the influence on the electric energy quality is affected.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
Distributed power supply active islanding detection device and method
The invention relates to a distributed power supply active islanding detection device and method, which belongs to the technical field of intelligent power grids. According to the invention, a neutral point of an isolation transformer high voltage side winding of an inverter in a power grid system is connected in series with a grounding transformer; the secondary side of the grounding transformer is connected with a low-frequency alternating current power supply; the alternating current power supply injects a certain amount of low-frequency voltage and low-frequency current into the neutral point in the power grid system through the grounding transformer; the voltage and the current of a measuring circuit composed of the grounding transformer and the alternating current power supply is measured in real time; and according to variation features of voltage and current measurement values before and after an islanding effect, an absolute value amplitude comparison principle is used to carry out islanding detection. According to islanding detection provided by the invention, the alternating current power supply is injected into the neutral point of the isolation transformer high voltage side winding of the inverter in the power grid; detection blind spots are eliminated; the impact of power quality on the power grid is reduced; and islanding detection can be quickly and accurately carried out.
Owner:STATE GRID CORP OF CHINA +2
Electromagnetic ultrasonic transducer of end portion-free detection blind area
ActiveCN105548352AOvercome adsorptionHigh strengthAnalysing solids using sonic/ultrasonic/infrasonic wavesUsing subsonic/sonic/ultrasonic vibration meansUltrasonic sensorSignal-to-noise ratio (imaging)
The invention discloses an electromagnetic ultrasonic transducer of an end portion-free detection blind area. The electromagnetic ultrasonic transducer comprises a magnetic upper shell and a non-magnetic lower shell, and a traction handle used for holding and operating; the lower shell is provided with a high frequency coil and two permanent magnets with a same magnetic pole direction, the two permanent magnets respectively have a sector-shaped structure with wide top and narrow bottom, the high frequency coil gets around the lower side of one of the permanent magnets to form an excitation end; the upper shell fits with the upper portion of the lower shell to make the two permanent magnets be adsorbed on the upper shell in a mutual parallel manner; and two sides of the lower portion of the lower shell are symmetrically provided with a plurality of rigid wheels. The electromagnetic ultrasonic transducer of the end portion-free detection blind area, adopting the above design, has the advantages of increasing of the intensity and the signal to noise ratio of a magnetic field and a signal, convenient use and operate, realization of convenient replacement of the coil, protection of the coil from being damaged, elimination of the detection blind area, and effective protection of the surface of a workpiece.
Owner:SUZHOU PHASERISE TECH
Detection method of unmanned aerial vehicle cruising around girder used for bridge detection
PendingCN109445454AImprove shooting accuracyImprove accuracyPosition/course control in three dimensionsInformation processingOriginal data
The invention belongs to the field of unmanned aerial vehicle bridge detection, and especially relates to a detection method of an unmanned aerial vehicle cruising around girder used for bridge detection. The method includes the following steps: step S1, establishing a three-dimensional coordinate model map of a bridge according to bridge original data and data shot by an unmanned aerial vehicle;step S2, planning a cruise detection path of the unmanned aerial vehicle according to the three-dimensional coordinate model map, a bridge column bottom area and a bridge column top area adopting equidistant plane encircling cruise paths, and a bridge column intermediate area adopting a spiral cruise path; step S3, executing, by the unmanned aerial vehicle, detection according to the cruise detection path; and step S4, returning, by the unmanned aerial vehicle, collected data to a ground information processing system to perform processing. The method can be directly applied to fully-automaticaccurate detection of bridge columns, so that the problems of high requirements on detection personnel and unsatisfactory detection effects of traditional bridge detection can be solved, and shootingprecision and accuracy can be greatly enhanced.
Owner:SHANDONG UNIV OF TECH +1
Sound shielding method for multipath channel
InactiveCN101335574AEliminate detection blind spotsWave based measurement systemsBaseband system detailsFiltrationData acquisition
The invention discloses an acoustic screen method of a multi-path channel. The method of the invention comprises the following steps: a sound velocity meter measures the acoustic velocity of water; a horizontal receiving array receives a radiation signal of a plurality of point sources in a sound field, amplifies the filtration and then carries out the data acquisition; the weight obtained by realizing the sound focusing of a spherical sound field array is the optimum focusing weight; based on the optimum focusing weight, shielding factors are increased to obtain the optimum focusing shielding weight; the output waveform is obtained by inverse Fourier transform and output power also can be obtained by frequency domain integral; the following coherent processing is carried out or the power after sound shielding and focusing is output. The invention is based on the principle and the method of sound shielding, applicable to multi-point source coherent interference in the water acoustics engineering; and in the engineering, the invention can adopt the horizontal array, thus being more applicable to being loaded on motion platform or being fixed at sea bottom.
Owner:HARBIN ENG UNIV
Tunnel lining state detection device
The invention discloses a tunnel lining state detection device which includes a mobile work platform (40). The lower end of a mechanical bent arm (10) is connected with the work platform (40) througha rotating gear shaft (11). The mechanical bent arm (10) is curved and telescopic. The rotating gear shaft (11) is connected with a first drive mechanism which can drive the mechanical bent arm (10) to swing around the rotating gear shaft (11) as an axis. A radar antenna support trolley (30) is disposed on a slip rope (20). The radar antenna support trolley (30) can move along the slip rope (20).A geological radar antenna (31) is fixed on the radar antenna support trolley (30). The mechanical bent arm is designed on the tunnel lining state detection device, and the design idea of linear lifting of a mechanical arm is changed. The detection speed is greatly improved. The response is quick. The motion range is very small. There is basically no obstacle avoidance behavior. The detection blind area is completely eliminated. The device has stable performance.
Owner:CHINA RAILWAYS CORPORATION +3
Method and system for pavement detection of automatic navigation vehicle
ActiveCN107368067AEliminate detection blind spotsRealize self-protectionPosition/course control in two dimensionsEngineeringRoad surface
The present invention is suitable for the automatic navigation vehicle field, and provides a method and system for pavement detection of an automatic navigation vehicle. The method comprises: performing real-time detection of barriers hanged or having height being lager than the chassis height of an automatic navigation vehicle on a front pavement, and generating obstacle avoidance alarm information when detected barriers cannot be avoided; performing real-time detection of the barriers on the front pavement through a contact detection mode, and generating collision avoidance alarm information when the barriers are detected; performing real-time detection of the dimensions of the barriers or the dimensions of a channel on the front pavement, and generating path-finding alarm information when the detected barriers or the channel cannot be spanned; and according to the obstacle avoidance alarm information, the collision avoidance alarm information and the path-finding alarm information, controlling the operation state of the automatic navigation vehicle. The method and system for pavement detection of the automatic navigation vehicle detect channels or barriers which cannot be spanned, fine stick objects difficult to be detected or hanged barriers on the front pavement to eliminate a detection blind area, allow the automatic navigation vehicle to avoid barriers or channels and realize self protection.
Owner:SHENZHEN LAUNCH DIGITAL TECH
Signal acquisition device of correction controller
The invention relates to a signal acquisition device of a correction controller, wherein the light emitted by a high-brightness LED (light-emitting diode) is directly focused to the detected object via a first convex lens; the reflected light on the detected object is rectilinearly propagated to a third convex lens via a second convex lens; the light of the third convex lens is focused to TCS230 colour sensors; the light signal received by the TCS230 colour sensors is conveyed to a single chip; the single chip processes and outputs data; two TCS230 colour sensors are used and placed on a PCB (printed circuit board) up and down; and the positions of the transversal parts of the two TCS230 colour sensors are superposed, and the transversal superposition distance must be less than the width of a reference guide wire. The detection blind zone of the correction controller is efficiently eliminated; and the control accuracy of the correction controller in either edge guiding mode or line detection mode can meet even exceed the present requirements of industrial field.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Island detection method for photovoltaic grid-connected inverter based on comprehensive frequency and phase information
InactiveCN106877395AReduce detection blind spotsEliminate detection blind spotsElectrical testingSingle network parallel feeding arrangementsNon detectionFrequency shift
The invention discloses an island detection method for a photovoltaic grid-connected inverter based on comprehensive frequency and phase information. Active frequency shifting detection can be realized based on frequency and phase information of the last period; the main principle is as follows: in the k zero-crossing point of an end voltage, the power grid voltage frequency of the last period is measured firstly; then an active frequency disturbance value f[k] is set to be equal to f[k-1] plus or minus <delta> f according to the frequency; meanwhile, a phase angle, which is as shown in the specification, is also changed according to the frequency f[k-1] of the inverter in the last period; island detection hardware performs active drifting on the frequency and phase of the power grid voltage and then the processed power grid voltage is used as the set frequency of the grid-connected inverter; in addition, the grid-connected current is reset in voltage zero-crossing; in grid-connection, the system frequency detected by the island detection hardware in each time is unchanged; in an off-network state, the system frequency detected in each time can rapidly achieve upper limit and lower limit of protection to perform protection actions so as to realize an anti-island function; and by virtue of the island detection method disclosed by the invention, non-detection regions in the conditions that the load is close to photovoltaic power generation power and the load is less than the photovoltaic power generation power can be obviously reduced.
Owner:XI AN JIAOTONG UNIV
Grid-connected inverter island detection method based on wavelet transform and neural network
InactiveCN102611140BReduce detection blind spotsEliminate detection blind spotsElectrical testingSingle network parallel feeding arrangementsGrid connected inverterIsland state
Owner:HEFEI UNIV OF TECH
Cable anti-theft device and method thereof
InactiveCN104700527AAvoid false alarmsSimple structureBurglar alarm by disturbance/breaking stretched cords/wiresElectric cablesFalse alarm
The invention relates to a cable anti-theft device and a method thereof and belongs to the field of cable theft prevention. A cable comprises a cable core, a protective layer located outside the cable core and a sheath layer covering the protective layer. The device comprises an alarm unit, a control center, a line breakage detection unit and a ranging unit; the control center outputs a signal to the alarm unit and the ranging unit; the input end of the line breakage detection unit is connected with the ranging unit; the output end of the line breakage detection unit is connected with the control center. The line breakage detection unit detects trace current in a circuit under detection, through volt-ampere characteristics of a triode and through the control center, thereby judging line breakage of a transmission line; once line breakage occurs, a ranging alarm is given out fast, and thus, economic loss is reduced and mistaken alarming of the existing detection circuit is avoided; the circuit is simple, and the problem that the prior cable anti-theft device is high in false alarm rate is solved.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
Field static vehicle weighing detecting method of dynamic road vehicle automatic weighing instrument
InactiveCN102155973AReduce deviation errorEliminate detection blind spotsWeighing apparatus testing/calibrationSpecial purpose weighing apparatusWork patternEngineering
The invention provides a field static vehicle weighing detecting method of a dynamic road vehicle automatic weighing instrument. A technical scheme of the invention comprises the following steps: the dynamic road vehicle automatic weighing instrument is set in a dynamic weighing mode; each wheel axle of a reference vehicle passes a bearer of the dynamic road vehicle automatic weighing instrument in turn; each wheel axle stops while running to the centre of the bearer; the wheel axles are dynamically weighed one by one to obtain axle load values; and finally the axle load values can be accumulated to obtain total vehicle weight and indication error of the following different reference vehicles. The field static vehicle weighing detecting method of the dynamic road vehicle automatic weighing instrument, provided by the invention, has the advantages that influences on the reference vehicle from outside factors like speed variation (acceleration and deceleration), larger speed (too short sampling time), deviation from a central position (passing in a curve and passing from one side), levelness of road surfaces on two ends of the bearer and the like during passing the bearer are effectively reduced, a metering detecting precision is increased and an accuracy of the weighing instrument is assured on the premise of no change of the working mode of the dynamic road vehicle automatic weighting instrument and the structure of the reference vehicle.
Owner:SHANDONG MEASUREMENT SCI RES INST
Fire alarm robot for transformer substations and inflammable places
InactiveCN104217519AImprove accuracyImprove timelinessFire alarmsPosition/course control in two dimensionsMicrocontrollerBlind zone
The invention discloses a fire alarm robot for transformer substations and inflammable places. The fire alarm robot comprises a transmission system, direct-current motor driving modules, flame sensors, smoke sensors, tracking modules, an ultrasonic module, an active buzzer module, a communication module, a single-chip microcomputer, a remote control module, a power source system and a fixing plate, wherein the direct-current motor driving modules, the flame sensors, the smoke sensors, the tracking modules, the ultrasonic module, the active buzzer module, the communication module, the remote control module and the power source system are connected with the single-chip microcomputer. The fire alarm robot has the advantages that accuracy and instantaneity of fire alarm are improved, detection blind zones are eliminated, time for fire alarm is shortened, fire damage is effectively reduced, manpower inspection tour is substituted and cost is reduced.
Owner:STATE GRID CORP OF CHINA +1
X-ray detector
InactiveCN102253064AEliminate detection blind spotsImprove accuracyMaterial analysis by transmitting radiationNuclear radiation detectionPhysicsForeign matter
The invention provides an X-ray detector applied to impurity detection. The detector comprises a conveyor line, double light source X-ray scanning equipment and information processing equipment, wherein the conveyor line is used for conveying detected articles; the double light source X-ray scanning equipment is used for generating two X rays for scanning the detected articles; the two X rays form a ray included angle; and the information processing equipment is connected with the double light source X-ray scanning equipment and is used for processing the information obtained after scanning of the double light source X-ray scanning equipment to form images. The X-ray detector based on double light sources can generate X-ray double light sources so as to project the detected articles in two directions to form two complementary X-ray detecting images, thus solving the intrinsic blind zone problem of the single light source detectors and improving the impurity detection accuracy rate.
Owner:上海高晶检测科技股份有限公司
Photomask detection method
InactiveCN103913943AEliminate detection blind spotsFully detectedOriginals for photomechanical treatmentMask inspectionEngineering
The invention provides a photomask detection method. The photomask detection method comprises the following steps: providing a control wafer, and transferring the patterns of the photomask to be detected to the control wafer; performing primary defect scanning on the control wafer; rotating the control wafer at 90 degrees, and then performing secondary defect scanning. According to the photomask detection method provided by the invention, the patterns of the photomask to be detected are transferred to the control wafer, and the control wafer is scanned in two perpendicular directions to eliminate detection blind points of scanning equipment, so that defects can be comprehensively defected by the scanning equipment.
Owner:SHANGHAI HUALI MICROELECTRONICS CORP
Island detection method and system
ActiveCN110824272AIncrease the degree of frequency offsetOperation will not affectCurrent/voltage measurementElectrical testingPower qualityIslanding
The invention provides an island detection method. An orientation error of the power-grid voltage phase angle is used as disturbance quantity which is superposed to a reactive current instruction by positive feedback, reactive power output of a grid-connected inverter is adjusted, when a power grid contactor is disconnected and an island effect occurs, voltage frequency deviation of a grid-connected point causes generation of a directional angle error, further, the reactive current instruction is subjected to positive feedback adjustment, the frequency deviation degree of the grid-connected point voltage is increased, a threshold is exceeded, passive protection of a detection system is triggered, and shutdown succeeds. Via the detection method and system, blind areas of island detection are eliminated, control is simple, island detection of the inverter can be carried out quickly and accurately, and electric energy quality during grid-connected operation is not influenced.
Owner:HEFEI WIN POWER
Safety light curtain sensor without dead zone
InactiveCN101862976AImprove securityAdd extension moduleOptical detectionMaintainance and safety accessoriesComputer moduleMachine tool
The invention relates to a safety light curtain sensor without a dead zone, which comprises a light projector, a light receptor, a machine tool, an output line and two extension modules. The extension modules are arranged at the bottoms of the light projector and the light receptor respectively and are in internal connection with circuits of the corresponding light projector and light receptor; and the output line is positioned on the outer side edges of the extension modules. The detection dead zone is effective eliminated and the safety performance of the light curtain sensor is greatly improved by adding the extension modules and changing the outgoing direction.
Owner:上海中护电子有限公司
Infrared multipoint touch television computer all-in-one machine
InactiveCN102109878AImprove accuracyUniform resolutionTelevision system detailsDigital data processing detailsInfraredComputer module
The invention discloses an infrared multipoint touch television computer all-in-one machine, which consists of a touch screen, a display, a computer module and a television module, wherein the touch screen is connected with the computer module through a universal serial bus (USB) interface and is used for communication through a USB data line; audio / video data are transmitted between the computer module and the television module through audio / video connecting lines; the touch screen is provided with an infrared emission array and a corresponding infrared receiving array; the infrared emission array consists of a plurality of infrared emission tubes; and each infrared emission tube consists of an emission tube core and a lead. The machine is characterized in that: a small-sized convex lens is arranged in front of a luminous surface of the emission tube core in each infrared emission tube; and the emission tube core is positioned at the focus point of the convex lens. The infrared emission tubes capable of converging infrared rays emitted by the infrared emission tubes are adopted, so that the emitted energy loss of the infrared rays is effectively reduced, and the size of the touch screen of the infrared multipoint touch television computer all-in-one machine can be increased.
Owner:厦门信烨联动传媒有限公司
Blind area early warning radar and blind area early warning system
PendingCN112213726AImprove securityEliminate detection blind spotsRadio wave reradiation/reflectionEarly warning systemBlind zone
The embodiment of the invention discloses a blind area early warning radar and a blind area early warning system, the blind area early warning radar comprises a first detection assembly and a second detection assembly, the first detection assembly is used for emitting a first electromagnetic wave, the first electromagnetic wave has a first detection viewing angle, and the second detection assemblyis used for emitting a second electromagnetic wave, the second electromagnetic wave has a second detection viewing angle. Two adjacent sides of the first electromagnetic wave and the second electromagnetic wave intersect or coincide, and a detection field angle formed by superposing the first detection viewing angle and the second detection viewing angle is larger than or equal to 180 degrees. Bymeans of the arrangement, the blind area early warning radar can conduct detection with the field angle of 180 degrees, the detection blind area is eliminated, and the safety of automobile driving isimproved.
Owner:AUTEL INTELLIGENT TECHNOLOGY CORP LTD
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