公开(公告)号：US20180284229A1

公开(公告)日：2018-10-04

申请号：US15785243

申请日：2017-10-16

Applicant: SZ DJI TECHNOLOGY CO., LTD.

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

IPC: G01S7/487 ,  G01S17/93 ,  G01S7/486

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：US12196855B2

公开(公告)日：2025-01-14

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：US11862929B2

公开(公告)日：2024-01-02

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

CPC classification number: 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：US10554097B2

公开(公告)日：2020-02-04

申请号：US15729518

申请日：2017-10-10

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Huai Huang ,  Jin Zhao ,  Peng Wang ,  Xiaoping Hong ,  Zhenhao Zhou

IPC: H02K7/14 ,  G02B26/10 ,  H02K1/27 ,  H02K1/14 ,  H02K7/08 ,  B64C39/02 ,  G02B26/08 ,  H02K7/116

Abstract: Hollow motor apparatuses and associated systems and methods for manufacturing the same are disclosed herein. In representative embodiment, a hollow motor apparatus includes a rotor assembly rotatable about a rotation axis, a stator assembly positioned adjacent to the rotor assembly and coaxially with the rotor assembly relative to the rotation axis, and a bearing assembly operably coupled to the rotor assembly. The rotor assembly has an inner portion around an opening configured to receive at least a portion of a payload. The bearing assembly is disposed outside the inner portion of the rotor assembly and is configured to maintain a position of the rotor assembly relative to the stator assembly.

公开(公告)号：US20190302247A1

公开(公告)日：2019-10-03

申请号：US16374248

申请日：2019-04-03

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Ke Wang ,  Chenghui Long ,  Xiaoping Hong

IPC: G01S7/497 ,  G01C3/08 ,  G01S7/486 ,  G01S17/42 ,  G01S7/481

Abstract: Techniques, systems, and devices relating to conducting calibration of LIDAR systems are disclosed. In one exemplary aspect, a light detection and ranging (LIDAR) device is disclosed. The device comprises a light beam emitter operable to emit a light beam; a prism set positioned in an optical path of the light beam to refract the light beam onto a surface of a surrounding object; a light detector to detect light reflected by the surface of the surrounding object; a controller configured to estimate the surface of the surrounding object based on the detected light. The controller is operable to (1) determine a relative bias in the prism set, and (2) cause, based on the relative bias in the prism set, a compensation for an estimation error in the controller's estimation of the surface of the surrounding object.

公开(公告)号：US20190064329A1

公开(公告)日：2019-02-28

申请号：US15944561

申请日：2018-04-03

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang Liu ,  Mingming Gao ,  Xiaoping Hong ,  Di Wu

IPC: G01S7/486 ,  G04F10/00 ,  H03K3/037 ,  H03K5/01 ,  G01S17/10 ,  G01S17/93

Abstract: Representative embodiments of the present technology include a device for measuring distance to an object. The device comprises a light emitter configured to emit an outbound light pulse and a light sensor configured to receive a returning light pulse and output a pulse signal representing the returning light pulse. The device further comprises a field-programmable gate array (FPGA) coupled to the light sensor and including a time-to-digital converter (TDC) having a series of sequentially coupled delay units. Individual sequentially coupled delay units are associated with corresponding individual delay times. At least some of the sequentially coupled delay units have different individual delay times. The TDC is configured to measure timing information of the pulse signal based at least in part on the individual delay times of the sequentially coupled delay units. The device further includes a controller configured to calculate the distance to the object based on the timing information.

公开(公告)号：US12092737B2

公开(公告)日：2024-09-17

申请号：US17082219

申请日：2020-10-28

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Huai Huang ,  Xiaoping Hong ,  Likui Zhou

IPC: G01S17/10 ,  G01S7/481 ,  G01S17/89 ,  G02B5/20

CPC classification number: G01S17/10 ,  G01S7/4811 ,  G01S17/89 ,  G02B5/20

Abstract: This application discloses distance detection apparatuses. The distance detection apparatus includes a light source, a transmitting and receiving lens, a detector, and an optical path change element. The light source is to emit a beam. The transmitting and receiving lens is to collimate the beam emitted by the light source, and converge at least a part of return light of the beam reflected by a to-be-detected object. The detector is placed with the light source on a same side of the transmitting and receiving lens, to convert at least a part of return light that passes through the transmitting and receiving lens into an electrical signal. The optical path change element is to change an optical path of the beam emitted by the light source or the return light that passes through the transmitting and receiving lens.

公开(公告)号：US20210341588A1

公开(公告)日：2021-11-04

申请号：US17369475

申请日：2021-07-07

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Shuai DONG ,  Xiaoping Hong

IPC: G01S7/481 ,  G02B27/30 ,  G01S17/10 ,  G02B27/09 ,  G02B3/04 ,  G02B26/10

Abstract: A ranging device includes a transmitter, a collimation element, a converging element, a detector, and at least one of a first pre-shaping element or a second pre-shaping element. The transmitter is configured to emit a light pulse sequence. The collimation element is configured to collimate the light pulse sequence. The converging element is configured to converge at least part of reflected light reflected by an object. The detector is configured to receive and convert the at least part of the reflected light to an electrical signal, and determine at least one of a distance or an orientation of the object with respect to the ranging device according to the electrical signal. An effective aperture of the collimation element is greater than an effective aperture of the first pre-shaping element, and an effective aperture of the converging element is greater than an effective aperture of the second pre-shaping element.

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：US20200067390A1

公开(公告)日：2020-02-27

申请号：US16665822

申请日：2019-10-28

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Zheyang Li ,  Huai Huang ,  Jin Zhao ,  Xiaoping Hong ,  Peng Wang

IPC: H02K16/02 ,  G02B26/10 ,  G02B7/18

Abstract: A driving device includes two rotor assemblies, a stator assembly, and a positioning assembly. Each rotor assembly includes a rotation axis and a rotor. The rotor includes a hollow chamber. The two rotor assemblies include a first rotor assembly and a second rotor assembly, a rotation axis of the first rotor assembly is parallel with a rotation axis of the second rotor assembly, a rotor of the first rotor assembly is at least partially embedded in a chamber of a rotor of the second rotor assembly. The stator assembly is surroundingly disposed at an outer side of the two rotor assemblies and drives a rotor. The rotor driven by the stator assembly causes another rotor of one of the first rotor assembly and the second rotor assembly to rotate. The positioning assembly is located outside of the rotors, and limits the rotors to rotate around corresponding fixed rotation axes.