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23 results about "Lidar detector" patented technology
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A lidar detector or laser detector is a passive device designed to detect the infrared emissions of law enforcement agencies' lidar speed detection devices and warn motorists that their speed is being measured. A limitation of lidar is that it cannot be used while a police car is in motion, because it requires the operator to actively target each vehicle, whereas traditional radar can be operated while the police officer is driving his car. Other restrictions include a precipitation free environment, as the laser can produce erratic readings from airborne moisture or smoke. Popularity of lidar speed detection is on the rise, though, as costs decline, ease of operation approaches radar, and existing radar equipment reaches its end-of-service life and is rotated out of service. Lidar detectors are generally less effective than radar detectors as the emissions they monitor are more brief, more concentrated and less easily scattered than radar; a motorist may therefore not have sufficient time to respond to the burst transmission of a lidar device, or the narrow beam might be focused on a specific part of a vehicle where the sensor cannot "see" it.
A laser ranging method, device, lidar, and storage medium
This application relates to the field of lidar, and discloses a lidar ranging method, device, lidar, and storage medium. The method includes: acquiring a spot pattern on a lidar detector and plotting a time-of-flight histogram; determining the distance type between the object to be measured and the lidar based on the spot pattern; determining the target time-of-flight region in the time-of-flight histogram based on the distance type; determining the target time-of-flight based on the target time-of-flight region; and determining the ranging result based on the target time-of-flight. This application does not require peak location for all regions of the time-of-flight histogram, effectively reducing the amount of peak calculation, improving the efficiency of peak position calculation and fitting accuracy, and eliminating the need to store excessive noise peak data.
Owner:SHENZHEN CAMSENSE TECHNOLOGIES CO LTD
DETECTOR ARRAY, CHIP, LIGHT COLLECTOR, LIDAR, DETECTOR ARRAY CONTROL METHOD
PendingDE112023004969T5Photometry electrical circuitsElectromagnetic wave reradiationDetector arrayLidar detector
A detector array, a chip, a light receiver, a LiDAR, and a detector array control method comprise: a plurality of detection unit groups, each of which comprises a plurality of detection units; a plurality of anode buses, each of which connects the plurality of detection units in the same detection unit group, and a number of anode buses corresponds to a number of detection unit groups; and a plurality of cathode buses, each of which connects the detection units in at least two of the detection unit groups, and the plurality of detection units in the same detection unit group are each connected to different cathode buses.The detection unit receives an optical signal when the anode bus and the cathode bus to which it is connected are activated simultaneously, and converts the optical signal into an electrical signal for output.
Owner:HESAI TECH CO LTD
Stray light filter structures for lidar detector array
PCT designated stage expiredWO2025116877A3Electromagnetic wave reradiationBandpass filteringPhotodetector
Embodiments of the present disclosure provide stray light filter structures in light detection and ranging (LiDAR) systems to attenuate stray light and reduce unwanted scattering. In some embodiments, a micro lens array is used together with a pinhole array to block stray light in the optical path just prior to the photodetector. In some embodiments, a bandpass optical filter is used in the optical path prior to the microlens array. In other embodiments, a slit filter is used further upstream in the optical path to block unwanted stray light and allow returning signal light to pass to imaging optics that provide a returning signal light image at a photodetector. In some embodiments, the imaging optics include a collimating lens and a focusing lens. In some embodiments, an optical bandpass filter is positioned on the optical path between the collimating lens and the focusing lens to reject light that is outside of a an expected wavelength range for returning signal light. These and other embodiments and details are further disclosed herein.
Owner:SEYOND INC
IR-transparent sensor and camera system for motor vehicles
A sensor system comprises a LiDAR unit, a camera for visible light and a cover through which light arrives at the LiDAR unit and the camera. The cover comprises a layer containing dyes.The light transmission of the cover in the range from 380 nm to 780 nm is 3% to 25% and in the range from 380 nm to 1100 nm is 40% or more. The attenuation of the LiDAR signal by the cover is such that at least 65% of the original signal intensity reaches the LiDAR detector.The layer containing dyes contains a composition comprising i) at least 70% by weight of a transparent thermoplastic polymer, ii) at least one green and / or red dye and iii) at least one red and / or violet dye.The product of the sum of the weight % fractions of dyes ii) and iii) and the thickness of the layer containing dyes is 0.041 to 0.12 wt % mm.Finally, the composition contains 0% to 0.0005% by weight of IR absorbers.
Owner:COVESTRO DEUTSCHLAND AG
Laser radar detection device and self-moving cleaning robot
This utility model discloses a lidar detection device and a self-propelled cleaning robot. The lidar detection device includes a base, a lidar detector, and a drive module. A first connector is provided on one side of the lidar detector in a first direction. The drive module is arranged side by side with the lidar detector in the first direction and includes a drive unit, a transmission mechanism, and a second connector. The second connector is fixedly connected to the first connector. The drive unit is driven by the transmission mechanism to drive the second connector to move, thereby moving the lidar detector relative to the base in a second direction. In this utility model, through the optimized design of the drive module layout, the overall size of the lidar detection device in the vertical direction is effectively reduced. The lidar detection device has a more compact structure and smaller size in the vertical direction, making it easier for the self-propelled cleaning robot to pass through low areas such as under furniture, thus expanding the cleaning area of the self-propelled cleaning robot.
Owner:麦悦未来智能科技(苏州)有限公司
Optical phased array laser radar system based on beam splitting system and scanning method thereof
ActiveCN121232199AUsing optical meansElectromagnetic wave reradiationRadar systemsImaging processing
The invention relates to the technical field of laser radar scanning, in particular to an optical phased array laser radar system based on a beam splitting system and a scanning method thereof, and the system comprises the beam splitting system and an optical phased array laser radar. The laser radar comprises a laser, an optical phased array, a visible light area array detector, an optical filter, a laser radar detector, an image processing module, a data processing module and a control module. The laser emits laser beams; the optical phased array changes the direction and the shape of a laser beam; the visible light area array detector obtains a two-dimensional grey-scale map; the laser radar detector receives the light beam passing through the filter; the image processing module obtains a point cloud coordinate set; the data processing module generates a control parameter set; the control module is used for controlling the optical phased array laser radar to scan the to-be-scanned area to obtain point cloud data. The method has the advantages that through target identification or edge contour identification, redundant data is reduced, and the complexity of subsequent data processing is reduced.
Owner:JILIN UNIVERSITY
Self-calibration method for nonlinearity of laser radar detector
ActiveCN120009863AWave based measurement systemsComplex mathematical operationsSingular value decompositionLidar detector
The invention discloses a non-linear self-calibration method for a laser radar detector, and the method comprises the following steps: (1) collecting laser radar echo signal data, controlling the pulse energy emitted by a laser to be gradually increased from 0% to 100%, setting a plurality of energy levels, collecting atmosphere echo signals at different distances under each energy level, and obtaining an observation signal matrix; (2) establishing a laser radar atmospheric echo theoretical signal model and defining a nonlinear response model to deduct background noise; (3) performing singular value decomposition on the observation signal matrix, and extracting principal components to construct a rank-one approximation matrix; (4) calibrating a nonlinear response curve; according to the method, laser energy or atmospheric parameters do not need to be calibrated in advance, the intensity gradient is naturally formed based on distance-energy scanning only by depending on the characteristics of echo signals, and a linear region and a saturation region are synchronously calibrated; the measurement precision and stability of the laser radar system are effectively improved.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
A self - calibration method for the non - linearity of a lidar detector
ActiveCN120009863BWave based measurement systemsComplex mathematical operationsSingular value decompositionLidar detector
The present invention discloses a self - calibration method for the non - linearity of a lidar detector, comprising the following steps: (1) Collect lidar echo signal data, control the laser to emit pulse energy to increase step by step from 0% to 100%, set multiple energy levels, and collect atmospheric echo signals at different distances at each energy level to obtain an observation signal matrix; (2) Establish a theoretical signal model of lidar atmospheric echo and define a non - linear response model to deduct background noise; (3) Perform singular value decomposition on the observation signal matrix, extract the principal components to construct a rank - one approximation matrix; (4) Calibrate the non - linear response curve; The present invention does not require prior calibration of laser energy or atmospheric parameters, only depends on the characteristics of the echo signal itself, forms an intensity gradient naturally based on distance - energy scanning, and synchronously calibrates the linear region and the saturation region; effectively improving the measurement accuracy and stability of the lidar system.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Coated articles demonstrating anti-reflection, contaminant build-up resistance and UV durability
ActiveUS12638615B2Lighting and heating apparatusOptical signallingAnti-reflective coatingGas detector
The present invention is directed to an article comprising an optical cover assembly. The optical cover assembly comprises: (A) a substrate comprising an outer surface and an opposing inner surface; (B) an optional first coating layer applied directly to at least the outer surface of the substrate; (C) an anti-reflective coating stack comprising at least one coating layer; and (D) a topmost coating layer comprising a fluorosilane polymer on the outer surface of the substrate. The optical cover assembly demonstrates hydrophobicity and extended UV durability, and serves as a component of at least one of a vehicle, a light sensor, a LiDAR detector, a motion sensor, a vision camera, a backup camera, a security camera, an IR camera, a headlight, a taillight, a signal light, a RADAR emitter, a RADAR detector, an aircraft landing light, and a gas detector.
Owner:PPG INDUSTRIES OHIO INC
Laser radar receiving light adjusting device
The utility model provides a laser radar receiving light adjusting device which comprises a hollow main shell frame, an adjusting seat capable of moving along the inner wall of the main shell frame is sleeved with the main shell frame, a collecting lens is arranged on one side of the adjusting seat, a light receiving plate is arranged on the other side of the adjusting seat, a detector is arranged in the center of the light receiving plate, and one end of the adjusting seat abuts against the light receiving plate. And the adjusting seat moves to change the relative distance between the light receiving plate and the collecting lens, so that the problem of focus position matching of the laser radar detector and the collecting lens is solved.
Owner:WUHAN ZOJIRUSHI INFORMATION TECH CO LTD
Small laser radar detector
The utility model discloses a miniature laser radar detector, which comprises a diode assembly, a diode tube body, a tail fiber tube body, a collimator and a tail fiber, a lens is prefabricated at the front end of the diode assembly, the diode assembly is fixed in the diode tube body through 353 glue, the tail fiber is coupled and fixed at the front end part of the collimator, and the tail fiber is fixed at the front end part of the collimator. The collimator is fixed in the tail fiber tube body through 353 glue, the tail part of the diode tube body and the head part of the tail fiber tube body are welded and fixed at a lap joint through laser welding, and the outer diameter of the diode tube body is 1.9 mm; the pipe bodies are fixed through laser welding, bubbles are not generated, components are not affected, the product performance is stable, the use effect is good, the lens prefabricated in advance is simpler, more compact and smaller in structure, small in size, convenient to use and low in use cost, and the use requirement is effectively met.
Owner:XIAMEN BELLE INFORMATION TECH CO LTD
Optical phased array lidar system based on a light splitting system and scanning method thereof
ActiveCN121232199BUsing optical meansElectromagnetic wave reradiationRadar systemsImaging processing
The present application relates to the technical field of laser radar scanning, and particularly relates to an optical phased array laser radar system based on a light splitting system and a scanning method thereof, the system comprising: a light splitting system and an optical phased array laser radar.The laser radar comprises: a laser, an optical phased array, a visible light area array detector, a filter, a laser radar detector, an image processing module, a data processing module and a control module; the laser emits a laser beam; the optical phased array changes the direction and shape of the laser beam; the visible light area array detector obtains a two-dimensional gray scale image; the laser radar detector receives the light beam after filtering by the filter; the image processing module obtains a point cloud coordinate set; the data processing module generates a control parameter set; and the control module is used to control the optical phased array laser radar to scan a region to be scanned to obtain point cloud data.The present application has the advantages that, through target recognition or edge contour recognition, redundant data is reduced, and the complexity of subsequent data processing is reduced.
Owner:JILIN UNIVERSITY
Probe control method and device, storage medium and laser radar
A kind of detector control method and device, storage medium, laser radar, detector control method includes: in response to receiving trigger signal, determining target instruction in instruction table, the instruction table includes multiple sequentially arranged instructions, each instruction includes first instruction part and second instruction part, the first instruction part indicates at least one operation object, and the second instruction part indicates multiple sequentially arranged operation steps;Determine the target time parameter corresponding to the operation step indicated by the target instruction, the target time parameter indicates each time interval between the operation step indicated by the target instruction;According to the target time parameter, at least one operation object is controlled to execute the target instruction, and the operation object is detector.The technical scheme of the present application can realize the flexibility of detector control.
Owner:SHANGHAI HESAI INTELLIGENT TECHNOLOGY CO LTD
Stray light filter structures for lidar detector array
PCT designated stage expiredWO2025116877A2Electromagnetic wave reradiationBandpass filteringPhotodetector
Embodiments of the present disclosure provide stray light filter structures in light detection and ranging (LiDAR) systems to attenuate stray light and reduce unwanted scattering. In some embodiments, a micro lens array is used together with a pinhole array to block stray light in the optical path just prior to the photodetector. In some embodiments, a bandpass optical filter is used in the optical path prior to the microlens array. In other embodiments, a slit filter is used further upstream in the optical path to block unwanted stray light and allow returning signal light to pass to imaging optics that provide a returning signal light image at a photodetector. In some embodiments, the imaging optics include a collimating lens and a focusing lens. In some embodiments, an optical bandpass filter is positioned on the optical path between the collimating lens and the focusing lens to reject light that is outside of a an expected wavelength range for returning signal light. These and other embodiments and details are further disclosed herein.
Owner:SEYOND INC
How to select targets for LIDAR in automatic mode
A method for selecting targets for a LIDAR involves generating a digital image of the surrounding environment using a device (3) for generating a wide-field environmental image record for LIDAR measurements. The device (3) is coordinated with a LIDAR detector (1). Objects suitable for reflecting a LIDAR laser beam are then detected on the digital image of the surrounding environment. The detected objects are then grouped into object groups that are physically close to each other. The detection and grouping of objects suitable for reflecting the LIDAR laser beam is performed by software processing of the digital image. The LIDAR then measures the distance to a designated object group. If the distance to the object group is measured, the object group is selected as a group of targets suitable for detection and measurement by the LIDAR. If the distance to the object group is not measured, the object group is excluded from the group of targets suitable for detection and measurement by the LIDAR.
Owner:SEC TECH SRO
Optical assembly for linkage of distance measurement and multispectral imaging
ActiveCN224203424UEnsure consistent responseImprove operational convenienceMountingsElectromagnetic wave reradiationLaser transmitterBeam splitter
The utility model relates to the technical field of optics, discloses an optical assembly for linkage of distance measurement and multispectral imaging, and lays a foundation for integration of multispectral imaging and distance measurement in the same system. According to the utility model, a second B / S beam splitter is arranged right above a first B / S beam splitter; the laser transmitter is positioned on the left side of the first B / S beam splitter; the laser radar detector and the CCD are located in the transmission direction and the reflection direction of the second B / S beam splitter respectively. A tunable light filter is arranged between the CCD and the second B / S beam splitter; wherein the detection wavelength of the laser radar detector is matched with the wavelength of the laser transmitter; a lens which shares the same optical axis with the laser transmitter and the first B / S beam splitter and can focus is reserved on the right side of the first B / S beam splitter; the optical distances between the first B / S beam splitter and the laser emitter, the CCD and the laser radar detector are equal; and a communication interface connected with the linkage controller is reserved on each electric control component.
Owner:SHENZHEN LUBANG TECH CO LTD
Target detection system based on multi-modal fusion
The invention discloses a multi-modal fusion-based target detection system, which is characterized in that an image detector, a LiDAR detector and an RADAR detector respectively extract candidate target proposals, a proposal optimizer optimizes and screens the candidate target proposals, an ROI alignment module performs multi-modal feature space alignment processing on the candidate target proposals subjected to optimization and screening, and the candidate target proposals are subjected to multi-modal feature space alignment processing. The image feature map processing module extracts a bounding box coordinate vector and a feature vector of each image candidate target proposal according to the image feature map, the feature vector comprises a classification vector and a confidence score, and the point cloud feature map processing module extracts a confidence score of each point cloud candidate target according to the point cloud feature map; and the confidence fusion module fuses the confidence scores of the modals to obtain a global confidence score and replaces the confidence score in the feature vector, and finally, the target regression module obtains a final target detection result. According to the invention, the accuracy of target detection is improved by fusing the candidate target proposal of the image and the radar point cloud data.
Owner:HENAN UNIV OF SCI & TECH
A test device and method for time stability of a streak tube laser radar detector
The application discloses a kind of test device of the stability of stripe tube laser radar detector with time, the device includes pulse signal trigger, host computer, laser collimation device and laser signal stripe tube imaging device, wherein: laser collimation device is constituted by laser and collimation system, and laser signal stripe tube imaging device is constituted by stripe tube detector and CCD camera.By the laser beam after collimation through stripe tube detector, the laser spot image obtained is stored into host computer using CCD camera, a large number of image data is stored by long-time running of the device, and then the offset of the centroid position of spot image with the working time of test device is analyzed by centroid extraction and other processing methods to achieve the purpose of testing the stability of stripe tube detector with time.The application can accurately collimate light beam, realize mode switching, ensure normal operation of each device of the system, and effectively test the stability of stripe tube detector.
Owner:HARBIN INST OF TECH
Detector array, chip, light receiver, lidar, detector array control method
PendingUS20250283983A1Photometry electrical circuitsElectromagnetic wave reradiationDetector arrayLidar detector
A detector array, a LiDAR, and a detector array control method are provided. The detector array includes: a plurality of detector units being divided into a plurality of detector unit groups; a plurality of anode buses, each of which connecting a plurality of detection units in a same detector unit group, and a number of the anode buses corresponding to a number of the detector unit groups; and a plurality of cathode buses, each of which connecting a plurality of detector units in at least two detector unit groups of the plurality of detector unit groups, and the plurality of detector units in a same detector unit group being connected to different cathode buses. A detector unit receives an optical signal when both its anode bus and cathode bus are activated, and converts the optical signal into an electrical signal for output.
Owner:HESAI TECH CO LTD
Mounting rack assembly of laser radar detector
The utility model relates to the technical field of laser radar installation, and discloses a mounting rack assembly of a laser radar detector, which comprises a base, a sleeve is fixedly arranged at the top of the base, a telescopic rod capable of stretching and retracting is inserted in the sleeve in a sliding manner, and a top plate is fixedly arranged at the top end of the telescopic rod. A mounting shell assembly is arranged on the bottom side of the top plate, and a detector body is mounted in the mounting shell assembly; according to the mounting frame assembly of the laser radar detector, the detector body is conveniently mounted and dismounted through the mounting shell assembly, a supporting rod is shifted into a sliding groove from a clamping groove, then the supporting rod is pulled upwards, a telescopic rod can be driven to move upwards from the interior of a sleeve, and then the detector body located at the top of the telescopic rod can synchronously move upwards; and the supporting rod is prevented from accidentally sliding out through the spring pin, so that the height of the laser radar detector can be adjusted according to actual conditions, and the practicability of the laser radar detector is improved.
Owner:CHONGQING HONGHE TECHNOLOGY CO LTD
Stray light filter structure for LIDAR detector array
Embodiments of the present disclosure provide stray light filter structures in light detection and ranging (LiDAR) systems to attenuate stray light and reduce unwanted scattering. In some embodiments, a microlens array is used with a pinhole array to block stray light in the optical path before the photodetector. In some embodiments, a bandpass filter is used in the optical path before the microlens array. In other embodiments, a slit filter is used more upstream in the optical path to block undesired stray light and allow return signal light to pass through imaging optics that provide a return signal light image at the photodetector. In some embodiments, the imaging optics include a collimating lens and a focusing lens. In some embodiments, an optical bandpass filter is positioned on the optical path between the collimating lens and the focusing lens to reject light outside the expected wavelength range of return signal light. These and other embodiments and details are further disclosed herein.
Owner:INNOVUSION INC
GmAPD data normalization using Bernoulli trials
Lidar systems may use highly sensitive GmAPD detectors to track obstacles in the environment of an autonomous vehicle. Data sensed by a lidar GmAPD detector can be pre-conditioned to facilitate differentiating low intensity signals from background noise. By sampling raw avalanche counts accumulated by the detector as Bernoulli trials, binomial statistics can be leveraged to transform raw data to a probability distribution, and then to a normalized data set suitable for signal processing.
Owner:LG INNOTEK CO LTD
Device and method for testing stability of streak tube laser radar detector along with time
The invention discloses a device for testing the stability of a streak tube laser radar detector along with time, and the device comprises a pulse signal trigger, an upper computer, a laser collimation device, and a laser signal streak tube imaging device. The laser signal streak tube imaging device is composed of a streak tube detector and a CCD camera. According to the invention, after the collimated laser beam passes through the streak tube detector, the CCD camera is utilized to store the obtained laser spot image into the upper computer, and a large amount of image data is stored through long-time operation of the device. And analyzing the offset condition of the mass center position of the light spot image along with the working time of the testing device through a processing method such as mass center extraction so as to achieve the purpose of testing the stability of the streak tube detector along with the time. The system can accurately collimate light beams, realizes mode switching, ensures normal work of each device of the system, and effectively tests the stability of the streak tube detector.
Owner:HARBIN INST OF TECH