公开(公告)号：US11703590B2

公开(公告)日：2023-07-18

申请号：US16758848

申请日：2019-11-18

Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.

Inventor： Letian Liu ,  Shen Jiang ,  Chunxin Qiu

IPC: G01S7/481 ,  G01S17/08

CPC classification number: G01S17/08 ,  G01S7/4814 ,  G01S7/4816

Abstract: The present application relates to a Lidar that includes a laser transmitter to emit a laser beam; an optical processing circuit. The optical processing circuit is configured to receive the laser beam reflected from a target object and convert the reflected laser beam to a photocurrent signal, and convert the photocurrent signal from an optical receiver to a voltage signal. The Lidar also includes a gain control circuit, connecting to the optical processing circuit; and a controller, connecting to the gain control circuit, to adjust a gain of the optical processing circuit via the gain control circuit and based on an amplitude of the voltage signal.

公开(公告)号：US12169253B2

公开(公告)日：2024-12-17

申请号：US18235877

申请日：2023-08-20

Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.

Inventor： Shen Jiang

IPC: G01S7/48 ,  G01S7/4861 ,  G01S7/487 ,  G01S7/489 ,  G01S17/10

Abstract: The present application provides a lidar receiving apparatus, a lidar system, a laser ranging method, a laser ranging controller, and a computer readable storage medium. The lidar receiving apparatus includes: a photodetector, which is configured to receive a reflected laser signal and to convert the reflected laser signal into a current signal when a bias voltage of the photodetector is greater than a breakdown voltage of the same; a ranging circuit, which is connected with the photodetector and configured to calculate distance data according to the current signal; and a power control circuit, which is connected with the photodetector and configured to control the bias voltage applied to the photodetector according to a predefined rule.

公开(公告)号：US12092736B2

公开(公告)日：2024-09-17

申请号：US18207648

申请日：2023-06-08

Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.

Inventor： Letian Liu ,  Shen Jiang ,  Chunxin Qiu

IPC: G01S7/481 ,  G01S17/08

CPC classification number: G01S17/08 ,  G01S7/4814 ,  G01S7/4816

Abstract: The present application discloses an optical signal processing circuit for a Lidar. The optical signal processing circuit includes an optical processing circuit, a gain control circuit connected to the optical processing circuit, and a controller connected to the gain control circuit. The optical processing circuit includes an optical sensor and an amplification circuit. The optical sensor is configured to convert an optical signal to a photocurrent signal, and the amplification circuit is configured to convert and amplify the photocurrent signal to a voltage signal. The controller adjusts a gain of the optical processing circuit via the gain control circuit and based on an amplitude of the voltage signal.

公开(公告)号：US11768278B2

公开(公告)日：2023-09-26

申请号：US17264544

申请日：2020-03-20

Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.

Inventor： Shen Jiang

IPC: G01S7/48 ,  G01S7/4861 ,  G01S7/487 ,  G01S7/489 ,  G01S17/10

CPC classification number: G01S7/4861 ,  G01S7/487 ,  G01S7/489 ,  G01S17/10

Abstract: A lidar receiving apparatus, a lidar system, a laser ranging method, a laser ranging controller and a computer readable storage medium are provided. The lidar receiving apparatus includes a photodetector (11), which is configured to receive a reflected laser signal and to convert the reflected laser signal into a current signal when a bias voltage of the photodetector (11) is greater than a breakdown voltage of the same; a ranging circuit (12), which is connected with the photodetector (11) and configured to calculate distance data according to the current signal; and a power control circuit (13), which is connected with the photodetector (11) and configured to control the bias voltage applied to the photodetector (11) according to a predefined rule, wherein the predefined rule includes: at a receiving time of a stray reflected signal, the bias voltage of the photodetector (11) is smaller than the breakdown voltage; and the receiving time of the stray reflected signal is a time at which a transmitted laser signal reaches the photodetector (11) through a stray light path other than a ranging light path. The lidar receiving apparatus may be employed to decrease a short-range blind area.