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    Systems and methods for optical distance measurement
    1.
    发明授权
    Systems and methods for optical distance measurement 有权

    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.

    SYSTEMS AND METHODS FOR OPTICAL DISTANCE MEASUREMENT
    3.
    发明申请
    SYSTEMS AND METHODS FOR OPTICAL DISTANCE MEASUREMENT 审中-公开

    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.

    DELAY TIME CALIBRATION OF OPTICAL DISTANCE MEASUREMENT DEVICES, AND ASSOCIATED SYSTEMS AND METHODS
    7.
    发明申请
    DELAY TIME CALIBRATION OF OPTICAL DISTANCE MEASUREMENT DEVICES, AND ASSOCIATED SYSTEMS AND METHODS 审中-公开

    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.

    DELAY TIME CALIBRATION OF OPTICAL DISTANCE MEASUREMENT DEVICES, AND ASSOCIATED SYSTEMS AND METHODS
    9.
    发明申请
    DELAY TIME CALIBRATION OF OPTICAL DISTANCE MEASUREMENT DEVICES, AND ASSOCIATED SYSTEMS AND METHODS 审中-公开

    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

    IPC: G01S7/486 ,  G01S17/93 ,  G01S7/497 ,  G01S17/10 ,  G04F10/00 ,  H03K3/037 ,  H03K5/01

    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.

    Methods and system for controlling a movable object
    10.
    发明授权
    Methods and system for controlling a movable object 有权

    公开(公告)号：US11092694B2

    公开(公告)日：2021-08-17

    申请号：US16415794

    申请日：2019-05-17

    Applicant: SZ DJI TECHNOLOGY CO., LTD.

    Inventor： Liuzheng Cui ,  Di Wu ,  Wei Zhang ,  Jianyu Song ,  Renli Shi

    IPC: G06G7/70 ,  G01S19/44 ,  B64C39/02 ,  G05D1/10 ,  G05D1/00

    Abstract: A computer-implemented method for controlling a controllable object includes determining a change in a baseline between a controlling object and the controllable object based on measurements from a first location sensor of the controlling object and a second location sensor of the controllable object, mapping the baseline change to a corresponding change in a navigation path of the controllable object based at least in part on a mapping function, generating one or more control commands according to the mapping, and controlling the controllable object to effect the state change according to the one or more control commands.

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