公开(公告)号：US20200150231A1

公开(公告)日：2020-05-14

申请号：US16727578

申请日：2019-12-26

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang LIU ,  Xiaoping HONG ,  Huan HE ,  Jiangbo CHEN

IPC: G01S7/484 ,  G01S7/497 ,  H01S5/042

Abstract: A power adjustment method includes controlling a power detection circuit of a laser measurement device to detect a power of laser emitted from a laser emission circuit of the laser measurement device, obtaining a threshold power corresponding to the laser measurement device, and adjusting the power of the laser according to the threshold power.

公开(公告)号：US20220120899A1

公开(公告)日：2022-04-21

申请号：US17520209

申请日：2021-11-05

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Yue YAN ,  Xiang LIU ,  Shuai DONG ,  Huai HUANG

IPC: G01S17/10 ,  G01S7/497 ,  G02B6/42 ,  G01S7/4861

Abstract: A ranging device includes a light emission device configured to emit a light pulse sequence, a light guide device, a first light reception device configured to monitor an output optical power of the light emission device, and a second light reception device configured to receive a light pulse signal reflected by an object and determine a distance between the object and the ranging device based on the light pulse signal. The light guide device includes a light incident surface, a reflection surface, and a light emission surface. The reflection surface includes a first reflection surface and a second reflection surface. At least one of the first reflection surface or the second reflection surface has a curved surface shape. The light guide device is configured to receive part of radiation power emitted by the light emission device and conduct the part of the radiation power to the first light reception device.

公开(公告)号：US20210239801A1

公开(公告)日：2021-08-05

申请号：US17214777

申请日：2021-03-26

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang LIU ,  Huai HUANG ,  Xiaoping HONG

IPC: G01S7/481

Abstract: A laser-ranging device includes an emitter, an optical assembly, a detecter, and a drive system. The emitter is configured to emit a laser pulse sequence. The an optical assembly includes a collimating lens and a converging lens. The collimating lens is configured to collimate the laser pulse sequence emitted by the emitter and emit the laser pulse sequence. The converging lens is configured to converge at least a part of return light reflected by a to-be-detected object. The detecter is configured to receive light converged by the converging lens, convert the light into an electrical signal, and determine a distance between the to-be-detected object and the laser-ranging device according to the electrical signal. The drive system is configured to drive the optical assembly to move in a plane perpendicular to an optical axis of the laser pulse sequence and/or along an optical axis direction of the optical axis.

公开(公告)号：US20200371209A1

公开(公告)日：2020-11-26

申请号：US16990598

申请日：2020-08-11

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang LIU ,  Xiaoping HONG ,  Huai HUANG

IPC: G01S7/487 ,  G01S17/10 ,  G01S7/481 ,  G01S17/93

Abstract: The present disclosure provides a ranging system. The system includes a first transmitter configured to emit a first optical signal to an object; a receiver corresponding to the first transmitter, configured to receive a reflected signal corresponding to the first optical signal; a second transmitter configured to emit a second optical signal to the object; a receiver corresponding to the second transmitter, configured to receive a reflected signal corresponding to the second optical signal; a controller configured to control the first transmitter to emit the first optical signal and the second transmitter to emit the second optical signal; and a measuring device configured to acquire indication information based on the received reflected signal corresponding to the first optical signal and the reflected signal corresponding to the second optical signal, and to determine a distance of the object based on the indication information.

公开(公告)号：US20200150232A1

公开(公告)日：2020-05-14

申请号：US16742224

申请日：2020-01-14

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang LIU ,  Zhipeng Zhan ,  Wenjin Pu ,  Xiaoping Hong

IPC: G01S7/487 ,  G01S17/933 ,  G01S7/486 ,  G01S7/4865

Abstract: Introduced here are techniques for implementing a comparator-based LIDAR system with improved components, such as an improved high-speed comparator circuit, to acquire depth information from the surroundings of an unmanned moving object (e.g., a UAV). In various embodiments, the LIDAR system includes an amplifier module with different configurations of anti-saturation circuitry. The LIDAR system may further include various feedback control mechanisms for noise interference reduction and timing measurement compensation including, for example, dynamic gain adjustment of the photodetector module, and/or dynamic adjustment of comparators' thresholds. Among other components, the disclosed comparator circuit can provide the LIDAR system with a wide dynamic range, preventing large signal amplification saturation while also providing sufficient magnification of small signals.

公开(公告)号：US20210333369A1

公开(公告)日：2021-10-28

申请号：US17371876

申请日：2021-07-09

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Shuai DONG ,  Xiaoping HONG ,  Xiang LIU ,  Yue YAN ,  Xiaoyi GUI

IPC: G01S7/481 ,  G01S17/08 ,  G01S17/894 ,  G01S7/48

Abstract: A ranging system includes at least two types of a first-type ranging apparatus, a second-type ranging apparatus, and a third-type ranging apparatus. Each of the first-type ranging apparatus and the second-type ranging apparatus includes a ranging device and a scanner. The ranging device includes a light source, a convergent lens, and a receiver. The third-type ranging apparatus includes a ranging device and a scanner. A FOV of the second-type ranging apparatus is smaller than a FOV of the first-type ranging apparatus. A diameter and a focal length of a convergent lens of the second-type ranging apparatus are greater than a diameter and a focal length of a convergent lens of the first-type ranging apparatus, respectively.

公开(公告)号：US20210208250A1

公开(公告)日：2021-07-08

申请号：US17194192

申请日：2021-03-05

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang LIU ,  Xiaoping HONG

IPC: G01S7/481 ,  G01S17/86 ,  G01S7/484 ,  G01C3/08

Abstract: Laser ranging method and apparatus are provided. The method includes controlling a target component to switch from a first state to a second state when the target component in a laser ranging apparatus is idle. Power consumption of the target component in the second state is less than power consumption in the first state. The laser ranging apparatus includes a plurality of components that include: at least one emitting circuit, at least one receiving circuit, at least one sampling circuit, and at least one operation circuit. The target component is at least one device in at least one of the components in the laser ranging apparatus.

公开(公告)号：US20210159664A1

公开(公告)日：2021-05-27

申请号：US17165744

申请日：2021-02-02

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang LIU ,  Guoguang ZHENG ,  Xiaoping HONG ,  Mingyu WANG ,  Shuai DONG

IPC: H01S5/02255 ,  H01S5/02253

Abstract: The present disclosure provides a laser diode package module. The laser diode package module includes a substrate including a first surface; a cover disposed on the first surface of the substrate; an accommodation space formed between the substrate and the cover; a laser diode die disposed in the accommodation space; and a reflective surface disposed in the accommodation space for outputting light of the laser diode die reflected by the reflective surface and transmitted through a light-transmitting area. The light-transmitting area is at least partially disposed on a surface of the cover opposite the substrate.

公开(公告)号：US20210075186A1

公开(公告)日：2021-03-11

申请号：US16949405

申请日：2020-10-28

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Guoguang ZHENG ,  Xiang LIU ,  Jiangbo CHEN ,  Xiaoping HONG

IPC: H01S5/022 ,  H01S5/042 ,  H01S5/024

Abstract: The present disclosure provides a laser diode module. The laser diode module includes a substrate including a first surface and a second surface opposite to each other; a cover disposed on the first surface of the substrate, and an accommodation space being formed between the substrate and the cover; and a laser diode die disposed in the accommodation space.

公开(公告)号：US20210072354A1

公开(公告)日：2021-03-11

申请号：US17081715

申请日：2020-10-27

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang LIU ,  Xiaoping HONG ,  Guoguang ZHENG ,  Huai HUANG ,  Jiangbo CHEN

IPC: G01S7/481 ,  G01S17/931 ,  G01S17/933 ,  H01L33/00

Abstract: Systems and techniques associated light detection and ranging (LIDAR) applications are described. In one representative aspect, techniques can be used to implement a packaged semi-conductive apparatus is disclosed. The apparatus includes a substrate; a diode die carried by the substrate and positioned to emit an electromagnetic energy beam; and a shell coupled to the substrate to enclose the diode die. The shell includes an opening or a transparent area to allow the electromagnetic energy beam emitted from the diode die to pass through the shell.