公开(公告)号：US20230071722A1

公开(公告)日：2023-03-09

申请号：US17899126

申请日：2022-08-30

申请人： Seagate Technology LLC

发明人： Daniel Joseph Klemme ,  Walter R. Eppler

IPC分类号： G01S7/4913 ,  G01S17/32 ,  G01S17/93

摘要： Method and apparatus for generating and processing pulses in a light detection and ranging (LiDAR) system. In some embodiments, an emitter outputs phase modulated continuous wave (PMCW) light sequences encoded with a selected encoding scheme such as a pseudo-random bit sequence (PRBS). An analog processing circuit processes reflected light sequences from a target illuminated by the PMCW light sequences by performing analog extraction of a doppler component and analog encoding correlation prior to digitalization of the received signal. The analog processing circuit can include a plurality of demodulation stages each multiplying the input signals by positive and negative magnitudes of a scalar value at times corresponding to signal transitions of different associated doppler clock frequencies. A threshold circuit applies suitable thresholding, after which the signals can be digitized by an analog-to-digital converter (ADC) for further processing in the digital domain to obtain range information associated with the detected target.

公开(公告)号：US11579269B2

公开(公告)日：2023-02-14

申请号：US16868322

申请日：2020-05-06

申请人： SICK AG

发明人： Hartmut Gimpel ,  Matthias Honal

IPC分类号： G01S7/4913 ,  G01S17/32 ,  G01S17/36

摘要： An optoelectronic sensor for determining the distance of an object in a monitoring area has a light transmitter for transmitting transmitted light, a light receiver for generating a received signal from remitted light remitted by the object, and a control and evaluation unit configured to modulate the transmitted light with at least a first frequency and a second frequency, to determine a phase offset between transmitted light and remitted light for the first frequency and the second frequency, and to determine a light time of flight. The control and evaluation unit is configured to determine a first amplitude and a second amplitude for the first frequency and the second frequency from the received signal and to detect whether the transmitted light impinges on an edge in the monitoring area on the basis of an evaluation of the first amplitude and the second amplitude.

公开(公告)号：US11525917B2

公开(公告)日：2022-12-13

申请号：US16420161

申请日：2019-05-23

申请人： FANUC CORPORATION

发明人： Minoru Nakamura ,  Yuuki Takahashi ,  Atsushi Watanabe

IPC分类号： G01S17/36 ,  G01S17/89 ,  G01S7/4913 ,  G01S7/497

摘要： A distance measuring apparatus includes an optical system abnormality detection section for detecting abnormalities of an optical system of the distance measuring apparatus by comparing a relationship between a measured distance value d and a light intensity Ls with a reference value Kρ, Kρ1, KLs0d0, or KAb0.

公开(公告)号：US20220357438A1

公开(公告)日：2022-11-10

申请号：US17869368

申请日：2022-07-20

申请人： AEVA, INC.

发明人： Ehsan Hamidi ,  Behsan Behzadi ,  Pradeep Srinivasan ,  Mina Rezk

IPC分类号： G01S7/4915 ,  G01S7/481 ,  G01S7/4913

摘要： A LIDAR system includes multiple waveguides to receive a return signal at different angles from a scanning mirror, multiple optical detectors to receive the return signal the plurality of waveguides, and a signal processing system operatively coupled to the plurality of optical detectors. The signal processing system is to process a signal generated from each of the optical detectors and combine the processed signals from the different optical detectors into a combined signal, wherein the combined signal is used to determine range and velocity information associated with a target.

公开(公告)号：US20220334235A1

公开(公告)日：2022-10-20

申请号：US17854798

申请日：2022-06-30

申请人： AEVA, INC.

发明人： Kumar Bhargav Viswanatha ,  Jose Krause Perin ,  Rajendra Tushar Moorti ,  Mina Rezk

IPC分类号： G01S7/493 ,  G01N29/46 ,  G01S7/4913 ,  G06F17/14

摘要： A frequency modulated continuous wave (FMCW) light detection and ranging (LIDAR) system includes a processor and a memory. The memory stores instructions that, when executed by the processor, cause the system to: receive samples of a range-dependent time domain baseband signal; assemble the samples into sample blocks in the time domain; convert the sample blocks from the time domain to the frequency domain; generate subbands in the frequency domain from converted sample blocks; classify the subbands into a plurality of subband types based on subband typing criteria; select subband processing parameters for each of the subbands based on respective ones of the plurality of subband types; and process each of the subbands using the selected subband processing parameters for the subband.

公开(公告)号：US11422244B2

公开(公告)日：2022-08-23

申请号：US16650816

申请日：2018-09-25

申请人： Bridger Photonics, Inc.

发明人： Michael James Thorpe ,  Peter Aaron Roos

IPC分类号： G01C3/08 ,  G01S7/4912 ,  G01S17/34 ,  G01S7/4913

摘要： Examples are provided that use multiple analog-to-digital converters (ADCs) to disambiguate FMCW ladar range returns from one or more targets that may be greater than the Nyquist frequencies of one or more of the ADCs. Examples are also provided that use a first and a second laser FMCW return signal (e.g., reflected beam) in combination with two or more ADCs to disambiguate one or more target ranges (e.g., distances to one or more objects).

公开(公告)号：US11422243B2

公开(公告)日：2022-08-23

申请号：US17320032

申请日：2021-05-13

申请人： AEVA, INC.

发明人： Ehsan Hamidi ,  Behsan Behzadi ,  Pradeep Srinivasan ,  Mina Rezk

IPC分类号： G01S7/4915 ,  G01S7/481 ,  G01S7/4913

摘要： A LIDAR system includes an optical source and multiple waveguides at different positions within the LIDAR system to receive a return signal. A first waveguide receives a first portion of the return signal at a first angle relative to the scanning mirror and a second waveguide receives a second portion of the return signal at a second angle relative to the scanning mirror. The system further includes multiple optical detectors at different positions within the LIDAR system. A first optical detector receives the first portion of the return signal from the first waveguide and a second optical detector receives the second portion of the return signal from the second waveguide. The system further includes a signal processing system operatively coupled to the plurality of optical detectors to determine a distance and velocity of the target object based on the returned signal and corresponding positions of the plurality of waveguides.

公开(公告)号：US20220260693A1

公开(公告)日：2022-08-18

申请号：US17526768

申请日：2021-11-15

申请人： MVI (ABC), LLC

发明人： Richard L. Sebastian ,  Anatoley T. ZHELEZNYAK

IPC分类号： G01S7/497 ,  G01S17/42 ,  G01S17/58 ,  G01S17/66 ,  G01S17/89 ,  G01S7/481 ,  G01S7/4913 ,  G01S17/86 ,  G06T7/80 ,  G06T7/70

摘要： A system uses range and Doppler velocity measurements from a lidar subsystem and images from a video subsystem to estimate a six degree-of-freedom trajectory of a target. The video subsystem and the lidar subsystem may be aligned with one another, and hence calibrated, by determining, for example, a centroid of an iris determined from the lidar subsystem and a centroid of the iris determined from the video subsystem and determining a calibration offset between the two centroids.

公开(公告)号：US20220236391A1

公开(公告)日：2022-07-28

申请号：US17613686

申请日：2019-10-09

申请人： Ningbo ABAX Sensing Electronic Technology Co., Ltd.

发明人： Shuyu LEI

IPC分类号： G01S7/497 ,  G01S7/4861 ,  G01S7/4913

摘要： A decoherent effect processing device, a decoherent effect processing system, and a method therefor. A circuit comprises a signal acquisition module and a processing module, the output end of the signal acquisition module being connected to the input end of the processing module; the signal acquisition module is configured to acquire coherent light and convert the coherent light into a first signal having polarities; and the processing module is configured to depolarize the first signal to obtain related values of the first signal.

公开(公告)号：US20220091241A1

公开(公告)日：2022-03-24

申请号：US17493117

申请日：2021-10-04

申请人： Samsung Electronics Co., Ltd.

发明人： Ilyoung KIM ,  Johngy LEE ,  Hojong KIM ,  Jaeyoung HUH

IPC分类号： G01S7/4913 ,  H04N5/225 ,  G01S7/497 ,  G01S17/26

摘要： An electronic device includes a communication circuit, a light source for emitting light of set frequencies, an image sensor for acquiring reflected light of the emitted light, a memory for storing offset values for respective reference frequencies of the set frequencies, and a processor. The processor is configured to receive a distance measurement input, identify whether the communication circuit is activated, determine that, in response to identification that the communication circuit is activated, a first frequency distinguished from a frequency used by the activated communication circuit is a frequency of the emitted light among the configured frequencies, acquire information on a distance between the electronic device and an external object, based on the reflected light of the emitted light of the first frequency, and acquire corrected distance information by applying an offset of the first frequency to the acquired distance information.