Patents by Inventor Letian Liu

Letian Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10838046
    Abstract: A multiline lidar includes: a laser emitting array configured to emit multi-beam laser; a laser receiving array configured to receive multiplexed laser echoes reflected by a target object; an echo sampling device configured to sample the multiplexed laser echo in a time division multiplexing manner and output a sampling data stream; a control system coupled to the laser emitting array, the laser receiving array, and the echo sampling device, respectively; the control system is configured to control operations of the laser emitting array and the laser receiving array, and determine measurement data according to the sampling data stream; and an output device configured to output the measurement data.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: November 17, 2020
    Assignee: Suteng Innovation Technology Co., LTD.
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20200355796
    Abstract: 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.
    Type: Application
    Filed: July 23, 2020
    Publication date: November 12, 2020
    Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin QIU, Letian LIU
  • Patent number: 10823853
    Abstract: 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.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: November 3, 2020
    Assignee: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Zhihua Chen, Letian Liu, Chunxin Qiu, Xujun Tan, Xiaojun Zhou
  • Publication number: 20200319339
    Abstract: 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.
    Type: Application
    Filed: May 12, 2020
    Publication date: October 8, 2020
    Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Zhihua CHEN, Letian LIU, Chunxin QIU, Xujun TAN, Xiaojun ZHOU
  • Patent number: 10761191
    Abstract: 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.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: September 1, 2020
    Assignee: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin Qiu, Letian Liu
  • Patent number: 10746855
    Abstract: 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).
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: August 18, 2020
    Assignee: Suteng Innovation Technology Co., LTD.
    Inventors: Chunxin Qiu, Letian Liu
  • Patent number: 10705189
    Abstract: 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.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: July 7, 2020
    Assignee: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20200209367
    Abstract: 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.
    Type: Application
    Filed: December 23, 2019
    Publication date: July 2, 2020
    Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin QIU, Letian LIU
  • Publication number: 20200150237
    Abstract: 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.
    Type: Application
    Filed: October 9, 2019
    Publication date: May 14, 2020
    Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin QIU, Letian LIU
  • Publication number: 20200103505
    Abstract: 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.
    Type: Application
    Filed: November 22, 2019
    Publication date: April 2, 2020
    Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin QIU, Letian LIU
  • Patent number: 10476553
    Abstract: The present invention relates to a wireless communication system with an energy transmission function. An output terminal of a control module is connected with an input terminal of an LVDS conversion module and an input terminal of a MOS driving module, respectively. An output terminal of the MOS driving module is connected with an input terminal of a MOS power amplifier module. The MOS power amplifier module is electrically connected with a power supply. An output terminal of the MOS power amplifier module is connected with an input terminal of an electric-to-magnetic conversion module. The input terminal of the electric-to-magnetic conversion module is also connected with an output terminal of the LVDS conversion module. An output terminal of an electric-to-magnetic conversion module is connected with an input terminal of a magnetic-ring coupling module. An output terminal of the magnetic-ring coupling module is connected with an input terminal of a magnetic-to-electric conversion module.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: November 12, 2019
    Assignee: Shenzhen Suteng JuChuang Technologies Ltd. Co.
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20190339367
    Abstract: 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).
    Type: Application
    Filed: October 18, 2017
    Publication date: November 7, 2019
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20190331772
    Abstract: 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.
    Type: Application
    Filed: April 28, 2019
    Publication date: October 31, 2019
    Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin QIU, Letian LIU
  • Publication number: 20190265335
    Abstract: The present application discloses a wide-angle LiDAR system that is stationary but configured to scan and map a wide range of the surrounding without rotating. The wide-angle LiDAR system disclosed herein includes multiple pairs of light emitter and receiver. Each pair of light emitter and receiver is configured to cover a section of the surrounding. Multiple pairs of light emitter and receiver are arranged to cover contiguous sections of the surrounding.
    Type: Application
    Filed: February 22, 2019
    Publication date: August 29, 2019
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20190146060
    Abstract: The present application discloses improvements that can be implemented in a laser detection and ranging (LiDAR) device to achieve accurate obstacle detection and to reduce measurement errors. A LiDAR device uses laser beams to scan a surrounding region to detect and identify objects. In one embodiment, the LiDAR control system is configured to refine a scanning region based on scanning results. The LiDAR control system may divide a scanning region into multiple sub-areas for differentiated scanning efforts. For example, the LiDAR control system may select a sub-area for enhanced scanning, e.g., with increased resolution. Methods for achieving scanning accuracy, increasing signal robustness, and reducing reflective noises are also disclosed.
    Type: Application
    Filed: November 9, 2018
    Publication date: May 16, 2019
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20190140698
    Abstract: The present invention relates to a wireless communication system with an energy transmission function. An output terminal of a control module is connected with an input terminal of an LVDS conversion module and an input terminal of a MOS driving module, respectively. An output terminal of the MOS driving module is connected with an input terminal of a MOS power amplifier module. The MOS power amplifier module is electrically connected with a power supply. An output terminal of the MOS power amplifier module is connected with an input terminal of an electric-to-magnetic conversion module. The input terminal of the electric-to-magnetic conversion module is also connected with an output terminal of the LVDS conversion module. An output terminal of an electric-to-magnetic conversion module is connected with an input terminal of a magnetic-ring coupling module. An output terminal of the magnetic-ring coupling module is connected with an input terminal of a magnetic-to-electric conversion module.
    Type: Application
    Filed: April 22, 2016
    Publication date: May 9, 2019
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20190129031
    Abstract: 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.
    Type: Application
    Filed: April 22, 2016
    Publication date: May 2, 2019
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20190120941
    Abstract: The present application discloses an improvement arrangement of light sources and detectors in a LiDAR device. In one embodiment, the LiDAR device comprises an oscillating mirror that reflects the light beams from a plurality of light sources to enlarge the scanning region of the LiDAR device. In some embodiments, light sources and detectors are paired to produce accurate scanning results.
    Type: Application
    Filed: October 18, 2018
    Publication date: April 25, 2019
    Inventors: Chunxin Qiu, Letian Liu
  • Publication number: 20180217240
    Abstract: A multiline lidar includes: a laser emitting array configured to emit multi-beam laser; a laser receiving array configured to receive multiplexed laser echoes reflected by a target object; an echo sampling device configured to sample the multiplexed laser echo in a time division multiplexing manner and output a sampling data stream; a control system coupled to the laser emitting array, the laser receiving array, and the echo sampling device, respectively; the control system is configured to control operations of the laser emitting array and the laser receiving array, and determine measurement data according to the sampling data stream; and an output device configured to output the measurement data.
    Type: Application
    Filed: May 10, 2016
    Publication date: August 2, 2018
    Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin QIU, Letian LIU
  • Patent number: D826746
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: August 28, 2018
    Assignee: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin Qiu, Letian Liu