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公开(公告)号：US20240151819A1
公开(公告)日：2024-05-09
申请号：US18481678
申请日：2023-10-05
IPC分类号： G01S7/481 , G01S7/484 , G01S7/486 , G01S17/89 , G01S17/931
CPC分类号： G01S7/4811 , G01S7/484 , G01S7/486 , G01S17/89 , G01S17/931
摘要： A LIDAR system includes a first polygon scanner, a second polygon scanner, and an optic. The first polygon scanner includes a plurality of first facets around an axis of rotation. The second polygon scanner includes plurality of second facets that are outward from the plurality of first facets relative to the axis of rotation. The optic is inward from the first polygon scanner relative to the axis of rotation. The optic is configured to output a first beam to the first polygon scanner. The first polygon scanner is configured to refract the first beam to output a second beam to the second polygon scanner. The second polygon scanner is configured to refract the second beam to output a third beam.
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公开(公告)号：US20240094388A1
公开(公告)日：2024-03-21
申请号：US18507612
申请日：2023-11-13
IPC分类号： G01S17/42 , G01S7/481 , G01S7/4915 , G01S17/89 , G01S17/931 , H04B10/548
CPC分类号： G01S17/42 , G01S7/4817 , G01S7/4915 , G01S17/89 , G01S17/931 , H04B10/548
摘要： Techniques for optimizing a scan pattern of a LIDAR system including a bistatic transceiver include receiving first SNR values based on values of a range of the target, where the first SNR values are for a respective scan rate. Techniques further include receiving second SNR values based on values of the range of the target, where the second SNR values are for a respective integration time. Techniques further include receiving a maximum design range of the target at each angle in the angle range. Techniques further include determining, for each angle in the angle range, a maximum scan rate and a minimum integration time. Techniques further include defining a scan pattern of the LIDAR system based on the maximum scan rate and the minimum integration time at each angle and operating the LIDAR system according to the scan pattern.
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公开(公告)号：US20240061127A1
公开(公告)日：2024-02-22
申请号：US18499734
申请日：2023-11-01
发明人： Edward Joseph Angus
IPC分类号： G01S17/931 , G01S7/481 , G02F1/29
CPC分类号： G01S17/931 , G01S7/4817 , G02F1/292 , G02B26/103
摘要： A light detection and ranging (LIDAR) system for a vehicle, includes a first scanner that receives a beam transmitted along an optical axis and projects the beam, a second scanner that is positioned along the optical axis, one or more motors that are coupled to the first scanner and the second scanner, and one or more processors. The one or more processors are configured to generate, based on one or more components of a particular waveform, a signal indicating data including a relative phase between the first scanner and the second scanner, and transmit the generated signal to the one or more motors, the signal causing the one or more motors to rotate the first scanner and the second scanner.
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公开(公告)号：US11874375B2
公开(公告)日：2024-01-16
申请号：US17586523
申请日：2022-01-27
发明人： Stephen C. Crouch , Randy R. Reibel , James Curry , Trenton Berg
CPC分类号： G01S17/42 , G01S13/18 , G01S13/343 , G01S13/428 , G01S13/526 , G01S13/582 , G01S17/89
摘要： Techniques for automatic adaptive scanning with a laser scanner include obtaining range measurements at a coarse angular resolution and forming a horizontally sorted range gate subset and a characteristic range. A fine angular resolution is determined automatically based on the characteristic range and a target spatial resolution. If the fine angular resolution is finer than the coarse angular resolution, then a minimum and maximum vertical angle is automatically determined in each horizontal slice extending a bin size from any previous horizontal slice. A set of adaptive minimum and maximum vertical angles is determined automatically by dilating and interpolating the minimum and maximum vertical angles of all the slices to the second horizontal angular resolution. A horizontal start angle, and the set of adaptive minimum and maximum vertical angles are sent to cause the ranging system to obtain measurements at the second angular resolution.
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公开(公告)号：US20220113387A1
公开(公告)日：2022-04-14
申请号：US17558021
申请日：2021-12-21
摘要： A system and method for scanning of coherent LIDAR. The system includes a motor, a laser source configured to generate an optical beam, and a deflector. A first facet of the plurality of facets has a facet normal direction. The deflector is coupled to the motor and is configured to rotate about a rotation axis to deflect the optical beam from the laser source. The laser source is configured to direct the optical beam such that the optical beam is incident on the deflector at a first incident angle in a first plane, wherein the first plane includes the rotation axis, wherein the first incident angle is spaced apart from the facet normal direction for the first facet. A second facet of the plurality of facets includes an optical element configured to deflect the optical beam at the first incident angle into a deflected angle.
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公开(公告)号：US20210278536A1
公开(公告)日：2021-09-09
申请号：US17331362
申请日：2021-05-26
IPC分类号： G01S17/26 , H04L12/28 , H04B10/516 , H04B10/50 , G08G1/16 , G08G1/04 , G01S7/4865 , G01S7/4915 , G01S17/89 , G01S17/34 , G01S17/931
摘要： In some implementations, a light detection and ranging (LIDAR) system includes a transmitter configured to transmit an optical signal that is output from a laser and modulated based on a modulating signal, a receiver configured to receive a returned optical signal in response to transmitting the optical signal, and a processor. The processor is configured to produce a first optical signal based on the returned optical signal and a first version of the modulating signal, produce a second optical signal based on the returned optical signal and a second version of the modulating signal, generate a digital signal based on the first optical signal and the second optical signal, determine a Doppler frequency shift of the returned optical signal based, at least in part, on the digital signal, and provide data indicative of the Doppler frequency shift to a vehicle.
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公开(公告)号：US20200292673A1
公开(公告)日：2020-09-17
申请号：US16888003
申请日：2020-05-29
摘要： A system and method for scanning of coherent LIDAR. The system includes a motor, a laser source configured to generate an optical beam, and a deflector. A first facet of the plurality of facets has a facet normal direction. The deflector is coupled to the motor and is configured to rotate about a rotation axis to deflect the optical beam from the laser source. The laser source is configured to direct the optical beam such that the optical beam is incident on the deflector at a first incident angle in a first plane, wherein the first plane includes the rotation axis, wherein the first incident angle is spaced apart from the facet normal direction for the first facet. A second facet of the plurality of facets includes an optical element configured to deflect the optical beam at the first incident angle into a deflected angle.
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公开(公告)号：US10712431B1
公开(公告)日：2020-07-14
申请号：US16725419
申请日：2019-12-23
IPC分类号： G01C3/08 , G01S7/481 , G02B26/10 , G01S17/931 , G01S17/89 , G01S7/4861
摘要： A LIDAR apparatus can include a polygon deflector that includes a plurality of facets. The LIDAR apparatus can include a motor rotatably coupled to the polygon deflector. The motor is configured to rotate the polygon deflector about a first axis orthogonal to a first plane. The LIDAR apparatus can include an optic positioned within an interior of the polygon deflector. The optic collimates a first beam to be incident on a particular facet of the plurality of facet. The particular facet of the plurality of facets refracts the first beam in the first plane between a first angle and a second angle as the polygon deflector rotates about the first axis to output a second beam.
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9.发明公开公开(公告)号：US20240241256A1
公开(公告)日：2024-07-18
申请号：US18469002
申请日：2023-09-18
发明人： Stephen C. Crouch , Trenton BERG , Randy R. REIBEL , James CURRY
摘要： Techniques for Doppler correction of chirped optical range detection include obtaining a first set of ranges based on corresponding frequency differences between a return optical signal and a first chirped transmitted optical signal with an up chirp that increases frequency with time. A second set of ranges is obtained based on corresponding frequency differences between a return optical signal and a second chirped transmitted optical signal with a down chirp. A matrix of values for a cost function is determined, one value for each pair of ranges that includes one in the first set and one in the second set. A matched pair of one range in the first set and a corresponding one range in the second set is determined based on the matrix. A Doppler effect on range is determined based on combining the matched pair of ranges. A device is operated based on the Doppler effect.
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公开(公告)号：US11852724B2
公开(公告)日：2023-12-26
申请号：US18085376
申请日：2022-12-20
IPC分类号： G01S17/42 , G01S17/931 , G01S7/481 , G01S7/4915 , G01S17/89 , H04B10/548
CPC分类号： G01S17/42 , G01S7/4817 , G01S7/4915 , G01S17/89 , G01S17/931 , H04B10/548
摘要： Techniques for optimizing a scan pattern of a LIDAR system including a bistatic transceiver include receiving first SNR values based on values of a range of the target, where the first SNR values are for a respective scan rate. Techniques further include receiving second SNR values based on values of the range of the target, where the second SNR values are for a respective integration time. Techniques further include receiving a maximum design range of the target at each angle in the angle range. Techniques further include determining, for each angle in the angle range, a maximum scan rate and a minimum integration time. Techniques further include defining a scan pattern of the LIDAR system based on the maximum scan rate and the minimum integration time at each angle and operating the LIDAR system according to the scan pattern.
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