公开(公告)号：US20210215825A1

公开(公告)日：2021-07-15

申请号：US17216365

申请日：2021-03-29

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Huai HUANG ,  Jin ZHAO ,  Xiaoping HONG

IPC: G01S17/42 ,  G01S7/481 ,  G01S7/4865

Abstract: The present disclosure provides a distance detection device. The distance detection device includes a light source configured to emit pulse light beams sequentially; and a scanning module including a first optical module, a second optical module, and drivers. The first optical module and the second optical module are sequentially positioned on an optical path of the light beams emitted by the light source, the drivers drive the first optical module and the second optical module to move to sequentially project the light beams emitted by the light source to different directions and form a strip-shaped scanning range after being emitted from the scanning module.

公开(公告)号：US20210336566A1

公开(公告)日：2021-10-28

申请号：US17370458

申请日：2021-07-08

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Chenghui LONG ,  Wanqi LIU ,  Jin ZHAO ,  Huan HE

IPC: H02P6/04 ,  G01S7/481

Abstract: A scan mechanism of a ranging apparatus includes a plurality of optical elements, a plurality of motors, and a controller or a plurality of controllers. The plurality of motors correspond to the plurality of optical elements. A motor includes a hollow rotor. An optical element is arranged at the rotor of a corresponding motor. The controller controls the plurality of motors. At least one of the plurality of controllers controls at least two of the plurality of motors. When one controller controls at least two motors, the controller controls the at least two motors to rotate at a predetermined angle difference based on a first synchronization strategy. When one controller controls one motor, the controller controls the motor and another at least one motor to rotate at the predetermined angle difference based on a second synchronization strategy.

公开(公告)号：US20210333399A1

公开(公告)日：2021-10-28

申请号：US17371676

申请日：2021-07-09

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Jin ZHAO ,  Chenghui LONG ,  Huai HUANG

IPC: G01S17/87 ,  G01S7/48 ,  G01D5/347 ,  G01B5/24

Abstract: A detection method includes obtaining first count data and second count data during rotation of an encoder disc mounted at and configured to rotate together with a rotation object and determining a rotation parameter of the rotation object according to the first count data and the second count data. The encoder disc includes N detection target portions arranged along a circumferential direction of the encoder disc. The N detection target portions include N−K first detection target portions and K second detection target portions. Along the circumferential direction of the encoder disc, a width of one of the N−K first detection target portions is different from a width of one of the K second detection target portions. The first count data is obtained when one detection target portion of the N detection target portions is detected. The second count data is recorded between two neighboring detection target portions.