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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：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：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
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：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.
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5.发明申请公开(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
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.
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Patent Agency Ranking
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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7.发明申请公开(公告)号：US20190324127A1
公开(公告)日：2019-10-24
申请号：US16450534
申请日：2019-06-24
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang Liu , Mingming Gao , Xiaoping Hong , Di Wu
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.
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公开(公告)号：US20210286079A1
公开(公告)日：2021-09-16
申请号：US17333573
申请日：2021-05-28
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang Liu , Xiaoping Hong , Fu Zhang , Han Chen , Chenghui Long , Xiaofeng Feng
IPC: G01S17/87 , G01S17/931 , G05D1/02 , G01S7/00
Abstract: Disclosed herein are techniques for implementing a distributed sensor (LIDAR) system with a management system (e.g., a controller) that controls and interfaces with multiple sensors in the distributed sensor system. A representative management system can control an operational state (e.g., power on, reset, over-current protection, etc.), an operating mode (e.g., modes corresponding to varying levels of performance), etc. The management system can combine separate outputs from the individual sensors into a combined output (e.g., point cloud). The management system can assist installation of the sensors, manage a self-test and/or a self-calibration of the sensors, or a combination thereof.
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公开(公告)号：US20210263303A1
公开(公告)日：2021-08-26
申请号：US17215654
申请日：2021-03-29
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Shuai DONG , Xiaoping Hong , Xiang Liu , Huai Huang , Jin Zhao
Abstract: Disclosed are techniques for scanning an optical beam in two dimensions (e.g. azimuth and elevation) and for increasing or decreasing a field-of-view (FOV) of the scanned beam. Scanning may be performed by various configurations of prisms, rotatable mirrors, and/or rotatable polygonal mirrors. In some configuration, changes to the FOV of the scanned beam may be performed by prisms positioned with a predetermined angular relationship and may include other optical components, as well. Depending on the predetermined angular relationship, the prisms can expand the FOV along one or more axis and/or may compress the FOV along one or more axis.
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公开(公告)号：US10371802B2
公开(公告)日：2019-08-06
申请号：US15944729
申请日：2018-04-03
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang Liu , Mingming Gao , Xiaoping Hong , Di Wu
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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