公开(公告)号：US20240402338A1

公开(公告)日：2024-12-05

申请号：US18412196

申请日：2024-01-12

Applicant: Continental Autonomous Mobility Germany GmbH

Inventor： Markus Wintermantel

IPC: G01S17/32 ,  G01S7/481 ,  G01S7/4911 ,  G01S7/4913 ,  G01S7/4915 ,  G01S17/931

Abstract: A coherently working lidar system for capturing the surroundings, which emits a phase-modulated signal, wherein the phase of said signal is produced by switching between discrete values from a sequence of phase values, and the times of the phase switching form a subset of an equidistant time raster. The system receives the signals reflected back from objects and converts the signals into a low-frequency signal by mixing and digitizing them in a receive sequence. The system determines the time shift and frequency shift of signals reflected by objects from said receive sequence. The phase modulation sequence includes two periodically interleaved sequences, wherein the first sequence has constant or periodic phase values and primarily serves to determine the frequency shift, whilst the second sequence substantially changes irregularly between phase values and serves to determine the time shift.

公开(公告)号：US20240361431A1

公开(公告)日：2024-10-31

申请号：US18758809

申请日：2024-06-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Cheng Xu ,  Hongbiao Gao ,  Li Zeng

IPC: G01S7/48 ,  G01S7/4913 ,  G01S7/493 ,  G01S17/34

CPC classification number: G01S7/4802 ,  G01S7/4913 ,  G01S7/493 ,  G01S17/34

Abstract: A sending apparatus, detection system, and detection method of a lidar are configured to exclude a false target from a plurality of targets. Frequency-sweep optical signals with different slopes are introduced, the frequency-sweep slopes of the different frequency-sweep optical signals are opposite in sign in a time period, and absolute values of the frequency-sweep slopes are not equal. For a plurality of real targets, coherent detection is performed in at least two time periods separately corresponding to the different frequency-sweep optical signals.

公开(公告)号：US20240264290A1

公开(公告)日：2024-08-08

申请号：US18421562

申请日：2024-01-24

Applicant: VELODYNE LIDAR USA, INC.

Inventor： Mattias Philip Ingvar Payne

IPC: G01S7/4913 ,  G01S7/497 ,  G01S17/32

CPC classification number: G01S7/4913 ,  G01S7/497 ,  G01S17/32

Abstract: Methods and systems for controlling a lidar device are disclosed. One example method includes determining a horizontal scan period PH for a lidar device. The method further includes determining a vertical swipe duration Ds for the lidar device based on (i) the horizontal scan period PH and (ii) a target frame duration Df for the lidar device. The method further includes determining a dead time Dd for the lidar device based on the vertical swipe duration Ds, the horizontal scan period PH, and the target frame duration Df. The method further includes controlling the lidar device to scan an environment according to the vertical swipe duration Ds and the dead time Dd.

公开(公告)号：US20240192370A1

公开(公告)日：2024-06-13

申请号：US18553737

申请日：2022-02-22

Applicant: SONY SEMICONDUCTOR SOLUTIONS CORPORATION

Inventor： TOMONORI MASUNO ,  TOMOO MITSUNAGA

IPC: G01S17/87 ,  G01S7/4913 ,  G01S17/36 ,  G01S17/48 ,  G01S17/894

CPC classification number: G01S17/87 ,  G01S7/4913 ,  G01S17/36 ,  G01S17/48 ,  G01S17/894

Abstract: An error in distance measurement is reduced. The distance measuring sensor generates multiple images by receiving light in light reception periods that are synchronized with pulse train pattern light, which repeats a light emission period and a non-light emission period of two types of luminance of a bright portion and a dark portion, and have different phases from each other. A bright region detecting unit detects a bright region which is a region generated by receiving reflected light corresponding to the bright portion of the pattern light in each of the multiple images. A first distance measuring unit detects a phase difference between the emitted pattern light and the reflected light on the basis of the bright regions detected in the multiple images and calculates a first distance measurement value that is a distance to the object on the basis of the detected phase difference. A bright region selecting unit selects among the bright regions, detected in the multiple images, on the basis of image signals constituting the images. A second distance measuring unit calculates a second distance measurement value that is a distance to the object by triangulation using a position of the selected bright region in the image. A fusion unit generates a fused distance measurement value by fusing the first distance measurement value and the second distance measurement value.

公开(公告)号：US20240183956A1

公开(公告)日：2024-06-06

申请号：US18062418

申请日：2022-12-06

Applicant: AEVA, INC.

Inventor： Eric Bohannon ,  Garret Phillips ,  Bryce Bradford

IPC: G01S7/497 ,  G01S7/4913 ,  G01S17/32 ,  G01S17/58 ,  H03L7/099

CPC classification number: G01S7/497 ,  G01S7/4913 ,  G01S17/32 ,  G01S17/58 ,  H03L7/099

Abstract: A laser diode control system for a frequency modulated continuous wave (FMCW) light detection and ranging (LIDAR) system includes circuitry to produce a phase locked loop, the phase locked loop including one or more integrated electronics components and an electronic circuit coupled to the one or more integrated electronics components. The electronic circuit receives an input signal from the one or more integrated electronics components and produces a feedback signal to mimic operation of one or more photonics components to test operation of the integrated electronic components of the phase locked loop.

公开(公告)号：US20240183947A1

公开(公告)日：2024-06-06

申请号：US18075622

申请日：2022-12-06

Applicant: AEVA, INC.

Inventor： Cameron Howard ,  Sawyer Isaac Cohen

IPC: G01S7/481 ,  G01S7/4913 ,  G01S17/34 ,  G02B26/10

CPC classification number: G01S7/4817 ,  G01S7/4812 ,  G01S7/4913 ,  G01S17/34 ,  G02B26/105 ,  G01S7/4813

Abstract: A light detection and ranging (LIDAR) system that includes an optical processing system to transmit an optical beam and receive a return signal responsive to transmission of the optical beam. The system also includes a 1D scanning mirror to reflect the optical beam from the optical processing system to a plurality of multifaceted mirrors. The system also includes a first multifaceted mirror and a second multifaceted mirror coupled to the first multifaceted mirror in a stacked configuration. The 1D scanning mirror is controllable to direct the optical beam to the first multifaceted mirror to generate a first scan pattern and to the second multifaceted mirror to generate a second scan pattern.

公开(公告)号：US20240159881A1

公开(公告)日：2024-05-16

申请号：US18508750

申请日：2023-11-14

Applicant: Voyant Photonics, Inc.

Inventor： Nir Regev ,  Christopher T. Phare

IPC: G01S7/4913 ,  G01S7/481 ,  G01S17/58

CPC classification number: G01S7/4913 ,  G01S7/4816 ,  G01S17/58

Abstract: Disclosed are systems and methods for optimizing signal sampling and processing of LIDAR FMCW return signals. Multiple sampling rates are applied to one or more up and down chirps to disambiguate the return signals over an extended beat frequency range thereby extending or improving range and velocity measurements or reducing hardware requirements.

公开(公告)号：US20240053453A1

公开(公告)日：2024-02-15

申请号：US18352798

申请日：2023-07-14

Applicant: Aurora Operations, Inc.

Inventor： Zeb William Barber ,  Stefan Heineman ,  Randy Ray Reibel

IPC: G01S7/4913 ,  G01S7/481 ,  G01S17/931 ,  G01S17/34

CPC classification number: G01S7/4913 ,  G01S7/4817 ,  G01S17/931 ,  G01S17/34

Abstract: A light detection and ranging (lidar) system may include a transceiver, a first device including a laser source configured to generate a beam, and one or more optical components, a second device including one or more analog-to-digital converters (ADCs), and a processor configured to alternately turn on the first device and turn on the transceiver. The first device may be configured to generate, based on the beam, an optical signal associated with a local oscillator (LO) signal. The transceiver may be configured to transmit the optical signal to an environment, in response to transmitting the optical signal, receive a returned optical signal that is reflected from an object in the environment, and pair the returned optical signal with the LO signal to generate an electrical signal. The second device may be configured to generate, based on the electrical signal, a digital signal.

公开(公告)号：US20230333228A1

公开(公告)日：2023-10-19

申请号：US17823251

申请日：2022-08-30

Applicant: Lumentum Operations LLC

Inventor： Christopher DOERR ,  Paul COLBOURNE

IPC: G01S7/497 ,  G02B6/12 ,  G01S7/481 ,  G01S7/4861 ,  G01S7/4913

CPC classification number: G01S7/497 ,  G02B6/12007 ,  G01S7/4817 ,  G01S7/4861 ,  G01S7/4913 ,  G02B6/29353

Abstract: An optical system may include a scanning element, a detector, and a planar lightwave circuit (PLC)-based walk-off compensator. The PLC-based walk-off compensator may include a plurality of input waveguides associated with receiving an optical signal from the scanning element. The PLC-based walk-off compensator may include an optical switch configured to select one or more input waveguides, from the plurality of input waveguides, to be coupled to the detector. The selection of the one or more input waveguides may be based on an expected walk-off of the optical signal. The PLC-based walk-off compensator may include an output waveguide to provide the optical signal to the detector.

公开(公告)号：US20230288564A1

公开(公告)日：2023-09-14

申请号：US18198814

申请日：2023-05-17

Applicant: PixArt Imaging Inc.

Inventor： Yueh-Lin CHUNG ,  Tso-Sheng TSAI

IPC: G01S17/36 ,  G01S7/4915 ,  G01S7/4913 ,  G01S7/4911

CPC classification number: G01S17/36 ,  G01S7/4915 ,  G01S7/4913 ,  G01S7/4911

Abstract: There is provided a distance measurement device including a light source, a light detector, a time control circuit and a processor. In first measurement, the time control circuit controls the light source to illuminate at a low modulation frequency, and the processor calculates a rough flying time according to a first detection signal of the light detector to determine an operating phase zone and a delay time. In second measurement, the time control circuit controls the light source to illuminate at a high modulation frequency and causes a light driving signal of the light source and a detecting control signal of the light detector to have a difference of the delay time, and the processor calculates a fine flying time according to a second detection signal of the light detector.