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公开(公告)号：US11550055B2
公开(公告)日：2023-01-10
申请号：US17035685
申请日：2020-09-29
发明人： Zhihua Chen , Letian Liu , Chunxin Qiu , Xujun Tan , Xiaojun Zhou
摘要： The present disclosure provides a range-finding system capable of data communication. The range-finding system includes a rangefinder for acquiring ranging data, a magnetic ring unit having at least two communication channels, and a data processing and control unit. Each communication channel includes a magnetic ring. The magnetic ring unit transmits the ranging data as downlink data from the rangefinder to the data processing and control unit via one or more of the communication channels.
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公开(公告)号：US10823853B2
公开(公告)日：2020-11-03
申请号：US15930426
申请日：2020-05-12
发明人： Zhihua Chen , Letian Liu , Chunxin Qiu , Xujun Tan , Xiaojun Zhou
IPC分类号： G01S17/88 , G01S7/481 , H04B10/40 , H04B10/112 , G01S7/487
摘要： The present disclosure provides a range-finding system capable of data communication. The range-finding system includes a rangefinder for acquiring ranging data, a magnetic ring unit having at least two communication channels, and a data processing and control unit. Each communication channel includes a magnetic ring. The magnetic ring unit transmits the ranging data as downlink data from the rangefinder to the data processing and control unit via one or more of the communication channels.
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公开(公告)号：US10761191B2
公开(公告)日：2020-09-01
申请号：US16597814
申请日：2019-10-09
发明人： Chunxin Qiu , Letian Liu
IPC分类号： G01S7/48 , G01S7/481 , G01S17/931
摘要： Embodiments of the disclosure provide a LiDAR assembly. The LiDAR assembly includes a central LiDAR device configured to detect an object at or beyond a first predetermined distance from the LiDAR system and an even number of multiple auxiliary LiDAR devices configured to detect an object at or within a second predetermined distance from the LiDAR system. The LiDAR assembly also includes a mounting apparatus configured to mount the central and auxiliary LiDAR devices. Each of the central and auxiliary LiDAR devices is mounted to the mounting apparatus via a mounting surface. A first mounting surface between the central LiDAR device and the mounting apparatus has an angle with a second mounting surface between one of the auxiliary LiDAR devices and the mounting apparatus.
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公开(公告)号：US10705189B2
公开(公告)日：2020-07-07
申请号：US16693157
申请日：2019-11-22
发明人： Chunxin Qiu , Letian Liu
IPC分类号： G01C3/08 , G01S7/481 , G01S7/4863 , G01S17/931
摘要： The present disclosure provides a multi-beam LiDAR system. The multi-beam LiDAR system includes a transmitter having an array of laser emitters. Each laser emitter is configured to emit a laser beam. The laser emitter array includes a first type of laser emitter board and a second type of laser emitter board. The second type of laser board includes two or more laser emitters. The second type of laser emitter board is not parallel to a predefined plane.
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公开(公告)号：US11592553B2
公开(公告)日：2023-02-28
申请号：US16095321
申请日：2016-04-22
发明人： Chunxin Qiu , Letian Liu
摘要： Provided are a pulse laser ranging system and method employing a time domain waveform matching technique. The system comprises a software part and a hardware part. The hardware part comprises an optical collimation system, an FPGA, a filter, a photoelectric conversion system, an analog amplifier circuit, a laser transmitter, a signal combination system, an ADC sampling system and a narrow pulse laser transmitting circuit. When transmitting a control signal to control laser transmission, the FPGA sends a time reference pulse to the signal combination system. The signal combination system integrates the time reference pulse with a fixed amplitude analog echo signal to form an echo signal with a time reference. The echo signal with a time reference is quantified into a digital detection signal in the ADC sampling system. The digital detection signal is sent to the FPGA to undergo data analysis. The software part is used to perform time domain waveform matching analysis to obtain a ranging result. The ranging result is output by the FPGA.
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公开(公告)号：US10746855B2
公开(公告)日：2020-08-18
申请号：US16474425
申请日：2017-10-18
发明人： Chunxin Qiu , Letian Liu
摘要： Disclosed are a multi-line lidar and a control method therefor. The multi-line lidar comprises: a laser emitter (110) for emitting outgoing lasers, comprising a plurality of laser emitting boards (111, 211, 212, 211, 212, 213, 310 and 320), and an optical collimating unit (120) for collimating the outgoing lasers. Light-emitting surfaces of the plurality of laser emitting boards (111) are located in a focal plane (130) of the optical collimating unit (120).
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公开(公告)号：US20190129031A1
公开(公告)日：2019-05-02
申请号：US16095321
申请日：2016-04-22
发明人： Chunxin Qiu , Letian Liu
摘要： Provided are a pulse laser ranging system and method employing a time domain waveform matching technique. The system comprises a software part and a hardware part. The hardware part comprises an optical collimation system, an FPGA, a filter, a photoelectric conversion system, an analog amplifier circuit, a laser transmitter, a signal combination system, an ADC sampling system and a narrow pulse laser transmitting circuit. When transmitting a control signal to control laser transmission, the FPGA sends a time reference pulse to the signal combination system. The signal combination system integrates the time reference pulse with a fixed amplitude analog echo signal to form an echo signal with a time reference. The echo signal with a time reference is quantified into a digital detection signal in the ADC sampling system. The digital detection signal is sent to the FPGA to undergo data analysis. The software part is used to perform time domain waveform matching analysis to obtain a ranging result. The ranging result is output by the FPGA.
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公开(公告)号：US11506760B2
公开(公告)日：2022-11-22
申请号：US16396753
申请日：2019-04-28
发明人： Chunxin Qiu , Letian Liu
摘要： The present disclosure provides a lidar and a lidar control method. The lidar includes a plurality of laser transmitters configured to transmit laser light, and an oscillating mirror configured to change a direction of a light path of the transmitted laser light. The lidar control method includes transmitting, by a plurality of transmitters, laser light; and changing, by an oscillating mirror, a direction of a light path of the transmitted laser light. The plurality of laser transmitters constitute a laser transmitter array of M rows and N columns, where M is an integer greater than or equal to 2 and N is an integer greater than or equal to 2.
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公开(公告)号：US11125864B2
公开(公告)日：2021-09-21
申请号：US16726035
申请日：2019-12-23
发明人： Chunxin Qiu , Letian Liu
IPC分类号： G01S7/497 , G01S17/931 , G01S17/894 , G01S7/481
摘要： The present disclosure provides a multi-beam LiDAR system. The multi-beam LiDAR system includes a transmitter having an array of laser emitters. Each laser emitter is configured to emit a laser beam. The multi-beam LiDAR system also includes a receiver having an array of photodetectors. Each photodetector is configured to receive at least one return beam that is reflected by an object from one of the laser beams. The laser emitter array includes a plurality of laser emitter boards perpendicular to a horizontal plane. Each laser emitter board has a plurality of laser emitters. The plurality of laser emitters in the laser emitter array are staggered along a vertical direction. The photodetector array includes a plurality of columns of photodetectors. One of the laser emitter boards corresponds to one column of photodetectors.
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