公开(公告)号：US20230129970A1

公开(公告)日：2023-04-27

申请号：US18145333

申请日：2022-12-22

申请人： HESAI TECHNOLOGY CO., LTD.

发明人： Feng LIANG ,  Shaoqing XIANG ,  Congbo SHI ,  Xiaotong ZHOU

IPC分类号： G01S7/48 ,  G01S7/484 ,  G01S7/497 ,  G01S7/4863 ,  G01S17/26

摘要： A control method of a lidar is provided. The lidar includes a laser emitter array with N laser emitters. The control method includes: controlling n laser emitters to emit a first detection laser beam, and controlling k laser emitters among the n laser emitters to emit a second detection laser beam; receiving echoes, reflected by a target object, of the first detection laser beam and the second detection laser beam; calculating a distance of the target object according to the echoes; and reducing, in a case that the target object is detected in a preset distance, an emission intensity of the first detection laser beam emitted by at least parts of the n laser emitters in a range corresponding to the target object in a next detection period.

公开(公告)号：US20230082295A1

公开(公告)日：2023-03-16

申请号：US17990259

申请日：2022-11-18

申请人： FUJITSU LIMITED

发明人： KOSUKE YANAI ,  Shinichi Fujiyoshi ,  Yoshikatsu KOHARA ,  Etsuko YAMASHITA ,  Koichi Iida ,  Katsushi Sakai

IPC分类号： G01S17/26 ,  G01S7/4865 ,  G01S7/481

摘要： A measurement device includes: a memory; and a processor coupled to the memory and configured to: generate a drive signal with a sine wave, according to a clock signal; control a reflection direction of output light of a light emitting device, by utilizing a resonance frequency, according to the drive signal; control a timing at which the drive signal is generated; and add or remove a pulse of a reference clock signal configured to generate the clock signal, according to a phase difference between a desired control signal and the control signal.

公开(公告)号：US11604264B2

公开(公告)日：2023-03-14

申请号：US17554189

申请日：2021-12-17

申请人： AEYE, Inc.

发明人： Joel Benscoter ,  Luis Dussan ,  Allan Steinhardt ,  Philippe Feru ,  Igor Polishchuk

IPC分类号： G01S7/48 ,  G01S7/481 ,  G01S17/26 ,  G01S7/4913 ,  G01S17/931 ,  G01S17/894

摘要： A lidar system comprises a first lens, a second lens, and a switch. The first lens has a first field of view that receives incident light from the first field of view. The second lens has a second field of view that receives incident light from the second field of view, wherein the second field of view is encompassed by and narrower than the first field of view. The switch controls which of the first and second lenses are used for detecting returns from laser pulse shots based on where the laser pulse shots are targeted in a field of view that encompasses the first and second fields of view. The switch may comprise an optical switch or an electronic switch.

公开(公告)号：US11604255B2

公开(公告)日：2023-03-14

申请号：US16912120

申请日：2020-06-25

申请人： Continental Advanced Lidar Solutions US, LLC

发明人： Howard Bailey ,  Patrick Gilliland ,  Barton Goldstein ,  Laurent Heughebaert ,  Brad Short ,  Joseph Spagnolia ,  Roger Stettner

IPC分类号： G01C3/08 ,  G01S7/481 ,  G01S17/10 ,  G01S17/36 ,  G01S17/66 ,  G01S17/88 ,  G01S17/894 ,  G01S17/26

摘要： A dual mode ladar system includes a laser transmitter having a wavelength of operation and a modulator connected thereto to impose a modulation thereon. The modulator is configured to impose amplitude modulation and/or frequency modulation. Diffusing optics illuminate a field of view and an array of light sensitive detectors each produce an electrical response signal from a reflected portion of the laser light output.

公开(公告)号：US11579301B2

公开(公告)日：2023-02-14

申请号：US16663249

申请日：2019-10-24

申请人： Red Leader Technologies, Inc.

发明人： Jacob Hillard ,  Rebecca Wong ,  Jhoneldrick Millares ,  Logan Herrera

IPC分类号： G01S17/89 ,  G01S7/481 ,  G01S7/48 ,  G01S7/4865 ,  G01S7/4914 ,  G01S7/4911 ,  G01S17/26

摘要： A lidar system, preferably including one or more transmit modules, beam directors, and/or receive modules, and optionally including one or more processing modules. A method of lidar system operation, preferably including: emitting light beams, receiving reflected light beams, and/or analyzing data associated with the received light beams.

公开(公告)号：US20220413110A1

公开(公告)日：2022-12-29

申请号：US17844227

申请日：2022-06-20

申请人： Seagate Technology LLC

发明人： Daniel Joseph Klemme ,  Kevin A. Gomez

IPC分类号： G01S7/497 ,  G01S17/50 ,  G01S17/26

摘要： Method and apparatus for light detection and ranging (LiDAR). In some embodiments, an emitter is used to emit a set of pulses to impinge a target, and a detector is used to detect a corresponding set of reflected pulses. Range information associated with the target is extracted using the reflected pulses. To compensate for doppler shift and enable more emitted pulses to be in-flight between the system and the target, a maximum expected doppler shift is determined, and the emitted pulses are provided with differential frequency intervals that are greater than the determined maximum expected doppler shift, such as a multiple (e.g., 2×) of the maximum expected doppler shift. In some cases, each in-flight pulse will have a unique frequency separated from all other pulse frequencies by at least the maximum expected doppler shift. Adaptive adjustments can be made such as increasing the differential frequency intervals for long distance targets.

公开(公告)号：US20220381912A1

公开(公告)日：2022-12-01

申请号：US17825434

申请日：2022-05-26

申请人： Infineon Technologies AG

发明人： Armin Josef Schoenlieb ,  Hannes Plank

IPC分类号： G01S17/26 ,  G01S7/48 ,  G01S7/4865

摘要： A method for Time-of-Flight (ToF) sensing of a scene is provided. The method includes performing, by a ToF sensor, a plurality of first ToF measurements using a first modulation frequency to obtain first measurement values. A respective correlation function of each of the plurality of first ToF measurements is periodic and exhibits an increasing amplitude over distance within a measurement range of the ToF sensor. The method additionally includes determining a distance to an object in the scene based on the first measurement values.

公开(公告)号：US11513226B2

公开(公告)日：2022-11-29

申请号：US16886180

申请日：2020-05-28

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Dongjae Shin ,  Hyunil Byun ,  Changgyun Shin ,  Bongyong Jang

IPC分类号： G01S17/42 ,  G01S7/4865 ,  G01S17/26 ,  G01S17/931 ,  G01S17/00

摘要： A light detection and ranging (LiDAR) apparatus capable of extracting speed information and distance information of objects in front thereof is provided. The LiDAR apparatus includes: a continuous wave light source configured to generate continuous wave light; a beam steering device configured to emit the continuous wave light to an object for a first time and stop emitting the continuous wave light to the object for a second time; a receiver configured to receive the continuous wave light that is reflected from the object to form a reception signal; and a signal processor configured to obtain distance information and speed information about the object based on the reception signal.

公开(公告)号：US11467269B2

公开(公告)日：2022-10-11

申请号：US16224459

申请日：2018-12-18

申请人： LADAR LIMITED ,  HJELMSTAD AS

发明人： Jens Hjelmstad

IPC分类号： G01C3/08 ,  G01S7/4911 ,  G01S17/42 ,  G01S17/89 ,  G01S7/499 ,  G01S17/26 ,  G01S17/86 ,  G01S13/86

摘要： A laser detection and ranging device for detecting an object under a water surface, the laser detection and ranging device having a laser transmitter being configured to modulate a laser beam by a binary pseudo-random coding sequence to obtain a modulated laser beam, and to transmit the modulated laser beam towards the water surface, a laser detector for detecting a reflected laser beam, the reflected laser beam forming a reflected version of the transmitted laser beam, and a processor for detecting the object under the water surface upon the basis of the reflected laser beam.

公开(公告)号：US11460576B2

公开(公告)日：2022-10-04

申请号：US16388839

申请日：2019-04-18

申请人： BEIJING VOYAGER TECHNOLOGY CO., LTD.

发明人： Yonghong Guo ,  Youmin Wang ,  Chao Wang ,  Yue Lu ,  Lingkai Kong

IPC分类号： G01S17/00 ,  G01S17/26 ,  G01S17/89 ,  G02B27/30 ,  G02B27/09 ,  G01S17/931

摘要： Embodiments of the disclosure provide transmitters for light detection and ranging (LiDAR). The transmitter includes a laser source, a light collimator, and a beam shifter. The laser source is configured to provide a native laser beam. The light collimator is configured to collimate the native laser beam to form an input laser beam transmitting along a lateral direction. The beam shifter is configured to shift the input laser beam along a vertical direction perpendicular to the lateral direction by a displacement to form an output laser beam. The output laser beam and the input laser beam are parallel to each other.