-
公开(公告)号：WO2020117912A1
公开(公告)日：2020-06-11
申请号：PCT/US2019/064428
申请日：2019-12-04
摘要： In one embodiment, a lidar system includes a light source configured to emit multiple optical signals directed into a field of regard of the lidar system. The optical signals include a first optical signal and a second optical signal, where the second optical signal is emitted a particular time interval after the first optical signal is emitted. The lidar system also includes a receiver configured to detect a received optical signal that includes a portion of the emitted first or second optical signal that is scattered by a target located a distance from the lidar system. The received optical signal is detected after the second optical signal is emitted. The receiver includes a first detector configured to detect a first portion of the received optical signal and a second detector configured to detect a second portion of the received optical signal.
-
公开(公告)号：WO2018236447A3
公开(公告)日：2018-12-27
申请号：PCT/US2018/024499
申请日：2018-03-27
发明人： RUSSELL, Austin K. , LACHAPELLE, Joseph G. , CAMPBELL, Scott R. , EICHENHOLZ, Jason M. , GAALEMA, Stephen D. , TRAN, Tue
摘要： To decrease the likelihood of a false detection when detecting light from light pulses scattered by remote targets in a lidar system, a receiver in the lidar system includes a photodetector and a pulse-detection circuit having a gain circuit with a varying amount of gain over time. The gain circuit operates in a low-gain mode for a time period T1 beginning with time t0 when a light pulse is emitted to prevent the receiver from detecting return light pulses during the threshold time period T1. Upon expiration of the threshold time period T1, the gain circuit operates in a high-gain mode to begin detecting return light pulses until a subsequent light pulse is emitted.
-
公开(公告)号：WO2018183715A1
公开(公告)日：2018-10-04
申请号：PCT/US2018/025197
申请日：2018-03-29
CPC分类号： G01S7/4861 , G01S17/10 , G01S17/42
摘要： A lidar system includes a light source configured to emit light pulses and a receiver configured to detect light from some of the light pulses scattered by remote targets. The receiver includes an avalanche photodiode operating in the linear mode for detecting the light pulses. To prevent damage to the linear mode avalanche photodiode a quench circuit is coupled to the avalanche photodiode, where the quench circuit reduces a bias voltage applied to the avalanche photodiode, when an avalanche event occurs at the avalanche photodiode.
-
公开(公告)号：WO2019118542A4
公开(公告)日：2019-06-20
申请号：PCT/US2018/065084
申请日：2018-12-12
IPC分类号： B60W40/02 , B60W30/14 , G05D1/02 , G05D1/00 , B60R21/0134
摘要： A method for controlling at least a first vehicle sensor includes receiving sensor data generated by one or more vehicle sensors that are configured to sense an environment through which the vehicle is moving, and identifying, based on the received sensor data, one or more current and/or predicted positions of one or more dynamic objects that are currently moving, or are capable of movement, within the environment. The method also includes causing, based on the current and/or predicted positions of the dynamic objects, an area of focus of the first sensor to be adjusted, at least by causing (i) a field of regard of the first sensor, and/or (ii) a spatial distribution of scan lines produced by the first sensor, to be adjusted.
-
5.发明申请
公开(公告)号：WO2019079532A1
公开(公告)日：2019-04-25
申请号：PCT/US2018/056409
申请日：2018-10-18
IPC分类号： H01S3/094 , G01S7/48 , G01S7/486 , G01S17/10 , G02B27/09 , H01S3/00 , H01S3/067 , H01S3/08 , H01S5/00
摘要： In one embodiment, a laser system includes: a seed laser diode configured to produce a free-space seed-laser beam; a seed-laser lens configured to collimate the seed-laser beam; a pump laser diode configured to produce a free-space pump-laser beam; a pump-laser lens configured to collimate the pump-laser beam; an optical-beam combiner configured to combine the collimated seed-laser and pump-laser beams into a combined free-space beam; a focusing lens configured to focus the combined beam; and an optical gain fiber that includes an input end configured to receive the focused beam. The laser system also includes a mounting platform, where one or more of the seed laser, the seed-laser lens, the pump laser, the pump-laser lens, the combiner, the focusing lens, and the input end of the gain fiber are mechanically attached to the platform.
-
公开(公告)号：WO2018236447A2
公开(公告)日：2018-12-27
申请号：PCT/US2018/024499
申请日：2018-03-27
发明人： RUSSELL, Austin K. , LACHAPELLE, Joseph G. , CAMPBELL, Scott R. , EICHENHOLZ, Jason M. , GAALEMA, Stephen D. , TRAN, Tue
摘要： To decrease the likelihood of a false detection when detecting light from light pulses scattered by remote targets in a lidar system, a receiver in the lidar system includes a photodetector and a pulse-detection circuit having a gain circuit with a varying amount of gain over time. The gain circuit operates in a low-gain mode for a time period T1 beginning with time t0 when a light pulse is emitted to prevent the receiver from detecting return light pulses during the threshold time period T1. Upon expiration of the threshold time period T1, the gain circuit operates in a high-gain mode to begin detecting return light pulses until a subsequent light pulse is emitted.
-
公开(公告)号：WO2018183515A1
公开(公告)日：2018-10-04
申请号：PCT/US2018/024865
申请日：2018-03-28
CPC分类号： G01S7/497 , G01S7/4804 , G01S7/484 , G01S7/4868 , G01S17/58 , G01S17/936 , G01S2013/9353 , Y02A90/19
摘要： To dynamically control power in a lidar system, a controller identifies a triggering event and provides a control signal to a light source in the lidar system adjusting the power of light pulses provided by the light pulse. Triggering events may include exceeding a threshold speed, being within a threshold distance of a person or other object, an atmospheric condition, etc. In some scenarios, the power is adjusted to address eye-safety concerns.
-
公开(公告)号：WO2021034798A1
公开(公告)日：2021-02-25
申请号：PCT/US2020/046745
申请日：2020-08-18
IPC分类号： G01S7/4865 , G01S17/894 , G01S7/487
摘要： In one embodiment, a lidar system includes a light source configured to emit (i) local-oscillator light and (ii) pulses of light, where each emitted pulse of light is coherent with a corresponding portion of the local-oscillator light. The lidar system also includes a receiver configured to detect the local-oscillator light and a received pulse of light, the received pulse of light comprising light from one of the emitted pulses of light that is scattered by a target located a distance from the lidar system. The local-oscillator light and the received pulse of light are coherently mixed together at the receiver. The receiver includes one or more detectors configured to produce one or more respective photocurrent signals corresponding to the coherent mixing of the local-oscillator light and the received pulse of light. The receiver also includes a pulse-detection circuit configured to determine a time-of-arrival for the received pulse of light.
-
公开(公告)号：WO2020033365A1
公开(公告)日：2020-02-13
申请号：PCT/US2019/045240
申请日：2019-08-06
发明人： DANZIGER, Eric C. , ENGLARD, Benjamin , MAHESHWARI, Pranav , MAILA, Tomi P. , RUSSELL, Austin K.
摘要： A computer-implemented method of determining relative velocity between a vehicle and an object. The method includes receiving sensor data generated by one or more sensors of the vehicle. The one or more sensors are configured to sense an environment through which the vehicle is moving by following a scan pattern comprising component scan lines. The method includes obtaining, by one or more processors, a point cloud frame based on the sensor data and representative of the environment and identifying, by the one or more processors, a point cloud object within the point cloud frame. The method further includes determining, by the one or more processors, that the point cloud object is skewed relative to an expected configuration of the point cloud object, and determining, by the one or more processors, a relative velocity of the point cloud object by analyzing the skew of the object.
-
公开(公告)号：WO2020018908A1
公开(公告)日：2020-01-23
申请号：PCT/US2019/042612
申请日：2019-07-19
发明人： EICHENHOLZ, Jason M.
摘要： A method in a lidar system for scanning a field of regard of the lidar system is provided. The method includes identifying, within the field of regard, a ground portion that overlaps a region of ground located ahead of the lidar system; causing a light source to emit pulses of light; scanning at least a portion of the emitted pulses of light along a scan pattern contained within the field of regard, including adjusting a scan parameter so that at least one of a resolution or a pulse energy for the ground portion of the field of regard is modified relative to another portion of the field of regard; and detecting at least a portion of the scanned pulses of light scattered by one or more remote targets.
-
-
-
-
-
-
-
-
-
搜索结果
24 条记录 (耗时 0.013 秒)
