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1964 results about "Laser detection" patented technology
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Firearm laser training system and method employing various targets to simulate training scenarios
InactiveUS20050153262A1Improve accuracyEasy to detectAiming meansTraining adaptationControl signalComputerized system
A firearm laser training system according to the present invention includes a laser assembly, actuable target assemblies and a computer system. The laser assembly is attached to a user firearm to project a laser beam toward the target. The target assemblies raise and lower targets in accordance with control signals from the computer system. Targets are raised to indicate intended targets, and are lowered in response to the beam impacting the raised targets or upon expiration of an interval without a beam impact. A corresponding target assembly forwards information to the computer system for display via wired or wireless communications. In addition, the training system may employ stationary target assemblies and / or laser-detecting body gear worn by exercise participants. The target assemblies and body gear communicate impact information to the computer system via wireless communications and may be utilized to create various training scenarios for firearm training.
Owner:KENDIR O TANSEL
Auxiliary cooperative vehicle infrastructure driving system and method
ActiveCN106340197AAvoid Positioning EffectsAvoid mistakesControlling traffic signalsDetection of traffic movementEngineeringLaser detection
The invention relates to an auxiliary cooperative vehicle infrastructure driving system and a method. The system comprises road side equipment and vehicle equipment, wherein the road side equipment comprises a laser detection module, a communication module and a road side main control module, the vehicle equipment is mounted on vehicles and is connected with a vehicle computer, the laser detection module is used for detecting objects in a first detection scope to acquire the vehicle road condition information of each vehicle in the detection scope and transmitting the information to the road side main control module, the road side main control module is used for determining the vehicle road condition information corresponding to each vehicle, communicating with each vehicle equipment in a first communication scope through the communication module and transmitting the vehicle road condition information to the vehicle equipment of the corresponding vehicles, and the vehicle equipment is used for transmitting the received vehicle road condition information to respective corresponding main control computers. Through the system and the method, the precise road condition information can be provided for automatic driving vehicles or auxiliary driving vehicles, and data support is provided for path planning and pass strategies of the vehicles.
Owner:BEIJING WANJI TECH
Pipeline detection robot
The invention relates to a pipeline detection robot. The pipeline detection robot mainly comprises a laser detection mechanism (1), a traction mechanism (2), an electromagnetic ultrasonic detection mechanism (3) and an electronic cabin (4), all of which are connected through connecting hinge shafts; the traction mechanism (1) adopts a single-motor all-drive mode and is driven by a turbo-worm synchronous belt to supply a walking power to the robot; the laser detection mechanism (2) comprises a laser displacement sensor, a rotating arm, a counterweight, a support body and the like and is used for measuring surface corrosion and deformation of a pipeline; the electromagnetic ultrasonic detection mechanism (3) comprises a support assembly, a probe and a fixing plate and is used for measuring the wall thickness and the crack defect of the pipeline; the electronic cabin (4) is used for carrying auxiliary components, such as a stepping motor controller, a servo motor driver, a power supply and an FPGA (Field Programmable Gate Array) control panel. The pipeline detection robot disclosed by the invention can be used for finding the defects, such as pipeline corrosion, cracks and deformation, carrying out in-service detection on an oil and gas pipeline in a working process, carrying out targeted repair, maintenance and replacement according to a detection result, reducing the maintenance cost and guaranteeing safe and stable operation of the oil and gas pipeline.
Owner:BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
Compact fiber-based scanning laser detection and ranging system
A system for short-range laser detection and ranging of targets can provides rapid three-dimensional, e.g., angle, angle, range, scans over a wide field-of-view. Except for the final transmit / receive lens, the disclosed LADAR system can be implemented in an all-fiber configuration. Such system is compact, low cost, robust to misalignment, and lends itself to eye-safe operation by making use of available pulsed 1550 nm fiber lasers and amplifier sources. The disclosed LADAR system incorporates many novel features that provide significant advantages compared to current LADAR systems. The disclosed system uses a monostatic fiber-based transmitter / receiver, a fiber beam scanner based on a laterally vibrating fiber, and a position sensor to monitor the transmitted beam position.
Owner:UNITED STATES OF AMERICA THE AS REPRESENTED BY THE SEC OF THE ARMY
Method and apparatus for pulse repetition sequence with high processing gain
InactiveUS20180306927A1Improve customer satisfactionAuxiliary diagnosisAnti-collision systemsElectromagnetic wave reradiationRadarPulse rate
The present application generally relates communications and hazard avoidance within a monitored driving environment. More specifically, the application teaches a system and method for improved target object detection in a vehicle equipped with a laser detection and ranging LIDAR system by employing a variable LIDAR pulse rate.
Owner:GM GLOBAL TECH OPERATIONS LLC
Incoherent doppler laser detection and ranging system
InactiveUS6181412B1Easy to useOptical rangefindersDevices using optical meansEdge filterLaser detection
The invention relates to an incoherent Doppler laser detection and ranging system of the Lidar type comprising an emission laser and a receiver device including at least one telescope, an edge filter, and processor means responsive to the power PT transmitted by the filter. The processor means has data inputs relating to the power PT and to the power PR and outputs a normalized signal DELTAPN, where:PR designating the power reflected by the edge filter.
Owner:EUROPEAN SPACE AGENCY
Rearview mirror assembly encompassing a radar detector and/or laser detector
One embodiment of a rearview mirror encompassing a plurality of radar detectors and laser detectors comprises of an opaque housing, a rearview mirror assembly, a universal mount, and a PCB assembly providing all of the illumination, audible indication, logic, user inputs, and radar and laser detection. Visual indications of radar or laser signals via illuminated indicators visible through the mirror, provide a fully functioning rearview mirror, when in standby mode. The device accommodates a plurality of mounts in order to accommodate all vehicle types. The geometry and mounting locations provide for more sensitive and accurate detection of radar and laser signals, while neither distracting the drive, detracting from the aesthetic nature of the vehicle, or causing a safety hazard.
Owner:BANKO INDS
Adaptive variable-speed scanning laser imager
InactiveCN1424591AImprove imaging effectElectromagnetic wave reradiationMobile laser scanningLaser imaging
A laser imaging apparatus with self-adaptable speed change scanning is used to obtain 3-D image of a target and belongs to the technical field of observation and imaging to ground. The apparatus is mainly used in 3-D imaging of the ground target on the basis of the observation to ground with laser scanning, and also used in 3-D laser imaging of close target and tomographic scan. A close loop mainly achieves the speed change scanning of a scanning lens driven by a scanning motor, and the basis for the scanning is the condition of fluctuation of the ground target. Electrical signal, mechanical rotation, laser detection and the like links to achieve the close loop. The close loop consists of four components, they are the components of optical members and of laser detection.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Unmanned helicopter three-dimensional positioning and mapping method based on laser detection and image recognition
InactiveCN102023003ALess weight gainImprove flight safetyPhotogrammetry/videogrammetryUsing reradiationLaser transmitterUncrewed vehicle
The invention relates to an unmanned helicopter three-dimensional positioning and mapping method based on laser detection and image recognition, which belongs to the technical field of application of unmanned aerial vehicles. A distance measurement sensor based on laser detection and image recognition, an altimetric sensor and a flight control computer are comprised, wherein the distance measurement sensor consists of a vehicle-mounted camera and a laser emitter and used for detecting the distance from the unmanned helicopter to obstacles around. The distance measurement sensor is used for detecting and measuring distance for the around environment of the unmanned helicopter by means of changing the angle of pitch and the angle of yaw. The altimetric sensor is used for measuring the flight altitude from the unmanned helicopter to the ground. The distance measurement data obtained from the measurement under different angles of altitude, angles of yaw and flight altitudes can realize three-dimensional synchronous positioning and mapping of unknown environment by the unmanned helicopter. In the invention, the around environment can be rapidly, simply and reliably detected during the flying by carrying the distance measurement sensor based on laser detection and image recognition on the unmanned helicopter.
Owner:TSINGHUA UNIV
Sea target size detection method based on vision and laser sensor data fusion
ActiveCN109283538ADistance compensationShort distance compensationElectromagnetic wave reradiationICT adaptationPoint cloudRadar
The invention relates to a sea target size detection method based on vision and laser sensor data fusion Firstly joint calibration is performed on the laser radar and the camera; then recognition training is performed on the sea target by using the visual SSD detection algorithm so that the camera can accurately select the obstacles at sea; the laser point cloud data detected by the laser are projected onto a two-dimensional raster map and the point cloud in the raster map is clustered so as to obtain the total number n of the obstacles on the sea surface detected by the laser; as for the obstacles with a distance less than 80 meters, the obstacle information detected by the laser radar counts; and as for the obstacles with a distance greater than 80 meters, the information of laser and vision fusion detection is used as the final detection result. According to the method, the approximate size information of the obstacles within the range of 200 meters and the distance from the obstacle to the unmanned ship can be obtained so as to greatly make up the defect of single sensor and improve the stability and the accuracy of target detection.
Owner:SHANGHAI UNIV
Zebra crossing pedestrian monitoring and warning device based on laser inspection
InactiveCN101763723AReduce the risk of traffic accidentsImprove operational efficiencyControlling traffic signalsArrangements for variable traffic instructionsTraffic accidentLight beam
The invention relates to a zebra crossing pedestrian monitoring and warning device based on laser inspection. The current devices have bad using effects. The device of the invention comprises a pedestrian monitoring device, a control box and signal lamps, wherein the pedestrian monitoring device comprises two trigger gates respectively arranged at the start and end of a zebra crossing; each trigger gate comprises a laser emission column and a laser pick-off column arranged on a sidewalk respectively at two ends of the zebra crossing; the laser emission column of each trigger gate emits laser beam and the laser pick-off column of each trigger gate picks off the laser beam; when a pedestrian passes through the trigger gates, the laser beam is cut off; two rows of signal lamps are respectively arranged at two sides of the zebra crossing; and the control box is arranged on a telegraph pole of the sidewalk. The device of the invention adopts the pedestrian monitoring systems arranged at two ends of the zebra crossing, and each pedestrian monitoring system is additionally provided with a passing in and out direction judging function, thereby improving the efficiency of system operation. The device of the invention is more conductive to remind drivers to avoid collision to reduce hidden danger of traffic accidents.
Owner:HANGZHOU DIANZI UNIV
No-scanning three-dimensional laser detection device received by array transmitting unit and method
ActiveCN104035097ASimplify complexityConducive to range extensionElectromagnetic wave reradiationRadarOptoelectronics
The invention discloses a no-scanning three-dimensional laser detection device received by an array transmitting unit and a method. The device comprises a two-dimensional array laser source, a unit laser detector, a system controller, a modulator and a demodulator. The method includes the following steps that the system controller controls the modulator to generate a laser pulse driving sequence and to send the laser pulse driving sequence to the two-dimensional array laser source and the demodulator, and the two-dimensional array laser source is driven by the modulator to generate corresponding modulating laser pulses and the modulating laser pulses irradiate a target area; the unit laser detector receives laser pulse echoes reflected from the target area, converts the laser pulse echoes and generates an electrical signal pulse sequence, the demodulator demodulates, recognizes and processes the electrical signal pulse sequence generated by the unit laser detector, and then outputs the electrical signal pulse sequence to the system controller, and the system controller controls an output distance numerical matrix. By means of the device and the method, complexity of detection elements is simplified, and achieving of laser detection distance range extending and long-distance non-scanning laser radar is facilitated.
Owner:江西华颂激光科技有限公司
Laser detection and image fusion system and method
ActiveUS20170219693A1Minimized exposure window durationEliminating background clutterImage enhancementTelevision system detailsLaser detectionSingle pulse
This invention describes a method for operating a weapon targeting system comprising the steps of using a laser to fire a single pulse at a target to obtain a reflected laser pulse; detecting the reflected laser pulse as a signal by a SWIR focal plane; detecting background illumination by using the SWIR focal plane; scene clutter filter and using optical filtering if it is necessary to suppress background illumination.
Owner:BAE SYST INFORMATION & ELECTRONICS SYST INTERGRATION INC
Wireless Connectivity in a Radar Detector
InactiveUS20120268306A1Wave based measurement systemsRoad vehicles traffic controlMobile cameraData connection
A radar detector accessory permits wireless connectivity to a smartphone to enhance or improve upon the existing radar detector, by providing enhanced display of the detector status and control of the detector, including storage of false alerts and locations of interest, storage and alerting to known hazards such as speed cameras and redlight cameras. Further, using the smartphone data connection, events of interest are reported to a central server, such as radar / laser detections, police activity sightings and mobile camera sightings, and remotely reported events of these types are delivered to the smartphone for delivery as alerts to the local driver.
Owner:ESCORT INC
Method and device for implementing Ramsey-CPT atomic frequency standard by microwave periodic On-Off modulation VCSEL
ActiveCN101847994AImprove stabilityNarrow line widthPulse automatic controlPreselected time interval producing apparatusElectricityMicrowave
Owner:WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
Method and system for detecting with laser the passage by a vehicle of a point for monitoring on a road
ActiveUS7405676B2Avoid problemsLow costDetection of traffic movementMaterial analysis by optical meansTraffic intensityLaser detection
The invention relates to a method for detecting the passage by a vehicle of a determined point for monitoring on a road, wherein from a remotely situated location a laser beam is transmitted continuously to the point for monitoring, reflections from the transmitted laser beam are received at the remotely situated location, and it is determined from the received reflections that the vehicle is passing the point for monitoring. The laser beam can be transmitted at right angles to the travel direction of the passing vehicle. The detection can be used to activate a red-light camera, to measure the speed of the vehicle or measure the traffic intensity, without sensors, for instance induction loops, having to be arranged in the road for this purpose. The invention further relates to a system for performing this method.
Owner:GATSOMETER
Laser outer diameter detecting instrument
InactiveCN101013026AMeet production needsDetection speedUsing optical meansLaser transmitterEconomic benefits
The invention discloses a laser detector, including the machine body, the laser detection head, the laser controller, the level mobile device, and the fixture part, and the said laser detection head and the laser controller are installed in the machine body, the level mobile device installed between the laser transmitter and the laser receiver on the main supporting board of the machine body, and the fixture part connecting with the level mobile device, which can left and right move with the driven of the level mobile device, and the fixture part has the rotating pair rotors, the groove formed between the rotors is used to place the detected products. The laser diameter detector also includes the control device to control the said laser detection head, the laser controller, the level mobile device, and movement of the fixture part. The invention can detect the diameter and beating value of the shaft units, with high detection speed and accuracy, to solve the difficulty the traditional manual detection, which is slow and low accuracy, and it has the multi-function detection, flexible parameter setting, easy and convenient operation, and this invention can meet the great demand for OA production industry, with the broad market and higher economic benefit.
Owner:SHENZHEN SHENLAN PRECISION MACHINERY
On-line non-contact laser stereo scanning detection device for internal screw threads of tubing coupling
InactiveCN101797701AImprove detection accuracySolve the detection speed is slowMeasurement/indication equipmentsUsing optical meansCouplingEngineering
The invention relates to an on-line non-contact laser stereo scanning detection device for the internal screw threads of a tubing coupling, which is used for carrying out one-by-one all-around dynamic on-line three-dimensional stereo scanning detection on the tooth profile parameters of all the internal screw threads to be processed in the processing process of special purpose machine tools, suchas a threading machine tool of the tubing coupling and the like, to the internal screw threads. The on-line non-contact laser three-dimensional scanning detection device comprises an axial movement mechanism assembly, a radial rotation mechanism assembly and a laser detection probe assembly. The radial rotation mechanism assembly is fixedly connected with the end of the axial movement mechanism assembly, and the laser detection probe assembly is fixedly connected at the end of the radial rotation mechanism assembly. The invention has a three-dimensional stereo scanning detection function, cancarry out high-speed high-accuracy on-line laser stereo scanning on the tooth profiles of the sections of different radial axles of the internal screw threads of the tubing coupling and obtains the three-dimensional stereo geometric information of the tooth profiles of the internal screw threads of the tubing coupling. The invention can enhance the detection accuracy and speed of the parameters of the internal screw threads, lightens the labor strength of a detection worker greatly and avoids the influence of human factors to the measurement accuracy. Moreover, the invention can be used for on-line quality monitoring and prediction and enhances the product quality.
Owner:BEIHANG UNIV
Method and device for detecting textile structure and dying defect using infrared laser
InactiveCN101187640AConvenient and accurate analysis and identificationInspecting textilesMaterial analysis by optical meansDisplay deviceOptoelectronics
The invention discloses a method for detecting textile structures and dyeing defects through infrared laser, which comprises projecting the infrared laser on a textile sample, collecting infrared laser transmitting images of the textile sample, displaying the infrared laser transmitting images of the textile sample on a displaying component. A device for detecting textile structures and dyeing defects through infrared laser is composed of a semiconductor laser and a infrared photography device, wherein the semiconductor laser and the infrared photography device are arranged fixedly on two ends of an optical path, a textile sample holdfast is arranged in the optical path which is between the semiconductor laser and the infrared photography device, a piece of condensing lens is arranged on the optical path which is between the semiconductor laser and the textile sample holdfast, a piece of object lens is arranged on the optical path which is between the textile sample holdfast and the infrared photography device, the infrared photography device is connected with a display. The infrared laser transmitting images of textile materials with grey scale and contrasting chrominance are displayed on the displaying component. The infrared laser transmitting images are provided for technological analysis and identifications.
Owner:上海市纤维检验所
Difference method for improving sensitivity and absolute precision of CPT (Coherent Population Trapping) atom magnetometer
InactiveCN103744034AEasy to operateHigh sensitivityMagnetic field measurement using magneto-optic devicesTrappingData acquisition
The invention discloses a difference method for improving the sensitivity and the absolute precision of a CPT (Coherent Population Trapping) atom magnetometer. The method comprises the following steps: putting a low-intensity magnetic field probe in a magnetic field to be detected at a constant temperature; adjusting a laser control circuit to keep the laser wavelength stable and keep resonance of the laser wavelength and alkali metal atomic ground state level; vertically putting a half-wave plate and a polarization beam splitter prism in laser, and adjusting the polarization angle of the optical axis of the half-wave plate and the laser; enabling a quarter-wave plate to be vertical to two beams of parallel laser; adjusting the polarization angle of the optical axis of the quarter-wave plate and the laser, wherein the polarization of the parallel laser becomes left-hand circular polarization and right-hand circular polarization respectively; carrying out laser detection on the left-hand circular polarization and the right-hand circular polarization by two photovoltaic conversion devices, and subtracting obtained light intensity values by a subtracter, wherein the magnetic induction intensity B of the magnetic field to be detected is obtained through acquisition and signal processing of data acquisition and processing equipment. The difference method has the advantages of easy operation, high sensitivity and high precision.
Owner:ZHEJIANG UNIV +1
Resonant type Fabry-Perot optical fiber sensor, manufacturing method and air pressure detecting method
ActiveCN103994851AImprove applicabilitySmall creepFluid pressure measurement by optical meansResonanceEngineering
The invention provides a resonant type Fabry-Perot optical fiber sensor which comprises a sensor body and a through hole penetrating through the sensor body. One end of the through hole is provided with a graphene thin film for sensing the to-be-detected air pressure in an attached mode, and the other end of the through hole is provided with transmission optical fibers which penetrate through the through hole and are matched with the through hole. According to the resonant type Fabry-Perot optical fiber sensor, the air pressure of gas is calculated in the mode that graphene thin film resonant frequency changes are caused by damp of the gas to the graphene thin film, so that a closed Fabry-Perot cavity is not needed, and the manufacturing difficulty is reduced; the the original measurement thin film deformation quantity is replaced by resonance to further conduct air pressure measurement, and thin film material creeping caused by repeated film deformation is effectively reduced; digital frequency signals after probe laser detection are output after the sensor conducts detection, and result analysis can be conveniently carried out compared with light wave signals of an interferometric sensor. Stimulation and detection are carried out through the single transmission optical fibers, and long-distance air pressure measurement can be achieved, and the applicability of the sensor is greatly improved.
Owner:THE HONG KONG POLYTECHNIC UNIV SHENZHEN RES INST
Fusion method of indoor SLAM map based on visual perception and laser detection
InactiveCN109857123AImprove accuracyRich relevant informationPosition/course control in two dimensionsMobile navigationPoint cloud
The invention discloses a fusion method of an indoor SLAM map based on visual perception and laser detection. The method comprises the steps of the laser detection, constructing a three-dimensional point cloud map, filtering and projection processing and map fusion; through the steps, on the one hand, a two-dimensional laser detection map containing ground height information is obtained, on the other hand, a three-dimensional visual perception point cloud map is obtained, and then after the three-dimensional visual perception point cloud map is filtered and projected, a two-dimensional visualperception map containing obstacle information is obtained; and finally, the two-dimensional laser detection map and the two-dimensional visual perception map are fused to obtain a two-dimensional fusion map. According to the fusion method of the indoor SLAM map based on the visual perception and the laser detection, the influential obstacle information in the process of robot navigation can be fused into two-dimensional map information to generate a two-dimensional map with high accuracy and rich information, and the practicability in an indoor environment for robot mobile navigation and pathplanning is high.
Owner:ZHENGZHOU UNIV
Method for monitoring and controlling clearance between wind power generator unit blade and tower drum
InactiveCN110005581AReduce operational riskReduced risk of collisionWind motor controlMachines/enginesLaser rangingElectricity
The invention discloses a method for monitoring and controlling the clearance between a wind power generator unit blade and a tower drum. The method comprises the following steps: step 1, mounting a first laser distance-detecting sensor and a second laser distance-detecting sensor at preset positions of a wind power generator unit cabin; step 2, enabling the first laser distance-detecting sensor and the second laser distance-detecting sensor to separately emit laser detecting beams, and detecting the distances between the first laser distance-detecting sensor as well as the second laser distance-detecting sensor and an external obstacle which the laser detecting beams encounter in real time; and step 3, when the distance between the first laser distance-detecting sensor or the second laserdistance-detecting sensor and the external obstacle is within a preset effective detecting distance range, judging whether the blade tip of the wind power generator unit blade enters a warning rangeor not, and triggering the execution of preset control operation. By the adoption of the method disclosed by the invention, the clearance between the blade tip of the wind power generator unit blade and the tower drum can be effectively monitored and controlled, the risk of collisions between the blade tip of the wind power generator unit blade and the tower drum can be remarkably reduced, and then the running risk of a wind power generator unit can be reduced.
Owner:TIANJIN SINO GERMAN VOCATIONAL TECHNICAL COLLEGE
Coherent LADAR using intra-pixel quadrature detection
ActiveUS10000000B2Electromagnetic wave reradiationRadio wave reradiation/reflectionLocal oscillatorReadout integrated circuit
A frequency modulated (coherent) laser detection and ranging system includes a read-out integrated circuit formed with a two-dimensional array of detector elements each including a photosensitive region receiving both return light reflected from a target and light from a local oscillator, and local processing circuitry sampling the output of the photosensitive region four times during each sample period clock cycle to obtain quadrature components. A data bus coupled to one or more outputs of each of the detector elements receives the quadrature components from each of the detector elements for each sample period and serializes the received quadrature components. A processor coupled to the data bus receives the serialized quadrature components and determines an amplitude and a phase for at least one interfering frequency corresponding to interference between the return light and the local oscillator light using the quadrature components.
Owner:RAYTHEON CO
Coherent anti-Stokes Raman scattering microscopic method and system of super-diffraction limit
The invention is applicable to the field of laser detection and provides a coherent anti-Stokes Raman scattering microscopic method and system of a super-diffraction limit. In the method, a spatial resolution of the super-diffraction limit can be obtained through increasing an additional detecting light which is collinearly focused on a sample together with a pump light and a Stokes light at the same time, enabling the additional detecting light to exhaust phonons generated by the pump light and the Stokes light on a periphery of a focal spot so as to form useless CARS (Coherent Anti-Stokes Raman Scattering) signals, enabling photons in accordance with a phase matching condition in the delayed detecting light to hit phonons at a central area of the focal spot so as to form useful CARS signals, and separating the useless CARS signals. Because supercontinuum laser with a broad band is adopted as the pump light and the Stokes light, a complete CARS spectrum signal of a molecule is obtained to image the whole molecule.
Owner:SHENZHEN UNIV
Mobile tunnel laser detection data processing method
ActiveCN110411361AImprove processing efficiencyAccurate removalUsing optical meansPoint cloudProjection image
The invention relates to a mobile tunnel laser detection data processing method. The method comprises steps of acquiring original, actual tunnel section point cloud data; correcting tunnel section mileage data based on accumulated errors; performing tunnel point deformation analysis, convergent diameter analysis, multi-phase data comparison and analysis and comparison and analysis of multiple measurement manners according to point cloud on the inner wall of the tunnel, so as to acquire tunnel deformation situation; determining whether the tunnel section point cloud is within a standard profileenclosed by limiting points by using a horizontal ray method, so as to determine whether invasion points exist; converting section point cloud data into a designed absolute coordinate system, so as to restore a design line type of the tunnel; and performing texture mapping by using an orthogonal projection image of the inner wall of the tunnel so as to acquire a 3D model of the tunnel. In the method, tunnel deformation analysis, mileage correction, boundary detection, recovery of the design line type of the tunnel and 3D modelling of the tunnel can be performed according to the original, actual section, and data is processed rapidly.
Owner:CAPITAL NORMAL UNIVERSITY
Natural gas pipeline leak detection system based on unmanned aerial vehicle
ActiveCN105805560ARealize real-time detectionStrong reflected signalPipeline systemsColor/spectral properties measurementsUncrewed vehicleLight beam
The invention relates to a natural gas pipeline leak detection system based on an unmanned aerial vehicle. The natural gas pipeline leak detection system based on the unmanned aerial vehicle is mainly characterized in that an inspection tour can be made on a natural gas pipeline, leak points and the leak diffusion range of the pipeline can be found in time, and loss caused by leak is reduced. According to the technical scheme, the unmanned aerial vehicle is provided with a small cargo compartment, and a natural gas laser detection system is installed in the small cargo compartment. Laser beams emitted by a laser device are divided into two paths, wherein one path is emitted through an emitting antenna, passes through leaking gas and then is reflected, the reflected lasers are received by a receiving antenna, and a first detector receives reflected signals; and the other path perpendicularly enters the soil surface nearby the pipeline, and is received by a second detector after being reflected. The natural gas pipeline leak detection system based on the unmanned aerial vehicle can simultaneously detect the natural gas leak concentration and a soil surface temperature anomaly caused by natural gas leak, thereby achieving the purpose of inspecting natural gas pipeline leak.
Owner:NANCHANG HANGKONG UNIVERSITY
Device and method for monitoring dislocation of loaded wafer of flat plate type epitaxial furnace
InactiveCN104505353AAvoid serious loss problemsAvoid abnormal situationsSemiconductor/solid-state device testing/measurementSemiconductor/solid-state device manufacturingLaser transmitterControl system
The invention provides a device and a method for monitoring the dislocation of a loaded wafer of a flat plate type epitaxial furnace. The device comprises a loaded wafer, a base of the epitaxial furnace, a loaded wafer groove, a mechanical hand, a laser transmitter, a laser receiver, a laser detection and control substrate and the like, wherein the laser detection and control substrate is mutually connected with a mechanical hand detection and control substrate of the epitaxial furnace and a machine table main control system. After the loading of the loaded wafer is completed, laser light is emitted to a center position of the loaded wafer of the epitaxial furnace substrate through the laser transmitter, and the laser light is reflected through the loaded wafer; the laser receiver is used for receiving the reflected laser light, and the monitoring of dislocation of the loaded wafer is carried out by judging whether the laser light is received by the laser receiver or not. According to the device and the method for monitoring the dislocation of the loaded wafer of the flat plate type epitaxial furnace, provided by the invention, the situation that a loaded wafer is subjected to dislocation can be accurately and effectively detected at the first time after the loading of the loaded wafer is completed, and the loss of an epitaxial wafer and follow-up device manufacturer can be avoided.
Owner:HANGZHOU LION MICROELECTRONICS CO LTD
Method and device for obtaining wheel set tread contour line of urban rail train
ActiveCN104163188ARelatively small errorWith online non-contact measurementWheel-rims surveying/measuringContact typeEngineering
The invention discloses a method and device for obtaining a wheel set tread contour line of an urban rail train. The device comprises two sets of 2D laser displacement sensors installed on the two sides of a rail in a mirror symmetry mode. The laser detection faces of the two sets of sensors are located on the same plane, and the integral device is lower than the rail surface. The method comprises the steps that after the sensors detect wheels at the same time to obtain detection point coordinates, the output points of the two sets of sensors are combined to a same coordinate system through coordinate transformation and coordinate translation; the x-coordinate value of the right end face of a tread is obtained, and a filtering window is established based on the x-coordinate value to remove interference points of measuring data; the x-coordinate value of the right end face of the tread is obtained, and measured data points are divided into K number sets according to the actual situations; least squares curve fitting is carried out on the data points of each number set; coordinate values of segment points are obtained, and each segment curve is smoothened into an integral tread contour line according to the lagrange multiplier method. The method and device have the advantages of being high in speed and precision, easy to operate, capable of carrying out online non-contact type measurement, and the like.
Owner:NANJING UNIV OF SCI & TECH
Component analyzer for laser probe micro-area
ActiveCN101587074AHigh absolute analytical precisionBig room for expansionFluorescence/phosphorescenceMountingsLaser probeTrace element
The invention belongs to the technical field of laser detection, specifically relates to a component analyzer for laser probe micro-area. The structure thereof comprises that: a laser, a beam expanding lens and a first total reflector are sequentially positioned on the same horizontal optical path; an included angle between the reflection plane of the first total reflector and the horizontal optical path is 45 degrees; an industrial CCD is positioned above the first total reflector, the industrial CCD and a first focusing object lens are sequentially arranged from top to bottom and optical axes thereof are superposed; the surface of a three-dimensional workbench is positioned below the first focusing object lens; the total reflector is movably mounted on the reflection optical path of a sample, an optical cable probe is positioned the reflection optical path of the total reflector; the industrial CCD is connected via the optical cable with a computer having a display, the optical cable probe is connected with a grating spectrograph, an enhanced CCD and the computer. The laser probe instrument can probe micro-area elements of substances losslessly, can satisfy rapid qualitative analysis for element components of devices having various materials and sizes, and can also implement high-accuracy quantitative analysis on micro elements and trace elements in the micro area of the sample.
Owner:HUAZHONG UNIV OF SCI & TECH
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