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公开(公告)号：US11469655B2
公开(公告)日：2022-10-11
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
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.
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公开(公告)号：US20210132202A1
公开(公告)日：2021-05-06
申请号：US17081913
申请日：2020-10-27
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang LIU , Xiaoping Hong , Guoguang Zheng , Huai Huang , Jiangbo Chen
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.
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公开(公告)号：US10698092B2
公开(公告)日：2020-06-30
申请号：US16460811
申请日：2019-07-02
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Ke Wang , Chenghui Long , Xiaoping Hong
IPC: G01S7/497 , G01S7/4861 , G01C3/08 , 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.
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公开(公告)号：US10539663B2
公开(公告)日：2020-01-21
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
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.
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公开(公告)号：US20180313941A1
公开(公告)日：2018-11-01
申请号：US15785358
申请日：2017-10-16
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Ke Wang , Chenghui Long , Xiaoping Hong
CPC classification number: G01S7/497 , G01C3/08 , G01S7/4817 , G01S7/4861 , G01S7/4972 , G01S17/42
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.
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Patent Agency Ranking
公开(公告)号：US11982768B2
公开(公告)日：2024-05-14
申请号：US16445146
申请日：2019-06-18
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang Liu , Mingming Gao , Xiaoping Hong , Di Wu
IPC: G01C3/08 , G01S7/4861 , G01S17/10 , H03K5/133 , H03K19/0175 , H03K5/24
CPC classification number: G01S7/4861 , G01S17/10 , H03K5/133 , H03K19/017581 , H03K5/24
Abstract: Systems and methods for performing optical distance measurement are provided. In one aspect, a system for measuring a distance to an object comprises a light emitter configured to emit an outbound light pulse, and a light sensor configured to receive a returning light pulse reflected from the object and output an analog pulse signal representing the returning light pulse. The system also comprises a field-programmable gate array (FPGA) coupled to the light sensor. The FPGA is configured to convert the analog pulse signal to a plurality of digital signal values, and generate a plurality of time measurements corresponding to the plurality of digital signal values. The system also comprises a controller configured to calculate the distance to the object based on the plurality of digital signal values and the plurality of time measurements.
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公开(公告)号：US20190383918A1
公开(公告)日：2019-12-19
申请号：US16460811
申请日：2019-07-02
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Ke Wang , Chenghui Long , Xiaoping Hong
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.
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公开(公告)号：US20190302241A1
公开(公告)日：2019-10-03
申请号：US16445146
申请日：2019-06-18
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang Liu , Mingming Gao , Xiaoping Hong , Di Wu
IPC: G01S7/486 , H03K19/0175 , G01S17/10 , H03K5/133
Abstract: Systems and methods for performing optical distance measurement are provided. In one aspect, a system for measuring a distance to an object comprises a light emitter configured to emit an outbound light pulse, and a light sensor configured to receive a returning light pulse reflected from the object and output an analog pulse signal representing the returning light pulse. The system also comprises a field-programmable gate array (FPGA) coupled to the light sensor. The FPGA is configured to convert the analog pulse signal to a plurality of digital signal values, and generate a plurality of time measurements corresponding to the plurality of digital signal values. The system also comprises a controller configured to calculate the distance to the object based on the plurality of digital signal values and the plurality of time measurements.
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公开(公告)号：US20180287459A1
公开(公告)日：2018-10-04
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
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.
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公开(公告)号：US20180284282A1
公开(公告)日：2018-10-04
申请号：US15729551
申请日：2017-10-10
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiaoping Hong , Huai Huang , Jiebin Xie
CPC classification number: H01S5/0071 , G01S7/4812 , G01S7/4816 , G01S7/4817 , G01S17/10 , G01S17/42 , G01S17/87 , G01S17/89 , H01S3/11 , H01S5/0078 , H01S5/06216 , H01S5/0657 , H01S5/06835 , H01S5/4012 , H01S5/4075 , H01S2301/08
Abstract: A sensor system can comprise a light source generating a light pulse that is collimated, and a plurality of optical elements. Each of the plurality of optical elements is configured to rotate independently about an axis that is substantially common, and the plurality of optical elements operate to collectively direct the light pulse to one or more objects in an angle of view of the sensor system. Furthermore, the sensor system can comprise a detector configured to receive, via the plurality of optical elements, at least a portion of photon energy of the light pulse that is reflected back from the one or more objects in the angle of view of the sensor system, and convert the received photon energy into at least one electrical signal.
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