公开(公告)号：US20190025413A1

公开(公告)日：2019-01-24

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

IPC: G01S7/486 ,  H03K19/0175 ,  H03K5/133 ,  G01S17/10

CPC classification number: G01S7/4861 ,  G01S17/10 ,  H03K5/133 ,  H03K5/24 ,  H03K19/017581

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.