METHOD OF OBTAINING OBSTACLE INFORMATION, AND METHOD AND DEVICE FOR EMITTING LASER PULSE

Title:

METHOD OF OBTAINING OBSTACLE INFORMATION, AND METHOD AND DEVICE FOR EMITTING LASER PULSE

Document Type and Number:

WIPO Patent Application WO/2019/109997

Kind Code:

A1

Abstract:

A method of obtaining obstacle information, and a method and device for emitting a laser pulse. The method of emitting a laser pulse comprises: emitting a first laser pulse at a first time; emitting a second laser pulse at a second time, wherein a peak power of the first laser pulse is less than that of the second laser pulse, a time interval between the second time and the first time is greater than T, where T is a time period between a time at which the laser pulse is emitted and a time at which a return signal of the laser pulse reflected by a near-field obstacle is received. As the first laser pulse has a lower power in the above solution, stray lights will not cause voltage saturation of a detecting circuit, and thus the first laser pulse reflected by a near-field obstacle can be detected, thereby effectively addressing the problem of a measuring blind zone of a near-field obstacle resulted from stray lights inside a laser radar at a lower cost; also, as the second laser pulse has a stronger signal, the normal detection of a far-field obstacle can be ensured.

Inventors:

PAN ZHENGQING (CN)
XIANG SHAOQING (CN)
LI YIFAN (CN)

Application Number:

PCT/CN2018/119721

Publication Date:

June 13, 2019

Filing Date:

December 07, 2018

Export Citation:

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Assignee:

HESAI PHOTONICS TECH CO LTD (CN)

International Classes:

G01S17/10; G01S7/484; G01S17/931

Foreign References:

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Other References: