LiDAR controlling method and device, electronic apparatus and storage medium

Patent metadata

Field	Value
Publication number	US-12228646-B2
Application number	US-202418592502-A
Country	US
Kind code	B2
Filing date	Feb 29, 2024
Priority date	Dec 23, 2021
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

The present application discloses a LiDAR controlling method and device, an electronic apparatus, and a storage medium. The method includes: in a measurement period, determining an emitting group to be started in the measurement period from a laser emitting array, where the emitting group includes at least two emitting units, and physical positions of the at least two emitting units meet a condition of no optical crosstalk; controlling the at least two emitting units to emit laser beams asynchronously based on a preset rule; controlling a receiving unit group of the laser receiving array corresponding to the emitting group to receive laser echoes, where the laser echoes refer to echoes formed after the laser beams are reflected by a target object; and when at least two emitting groups are determined in the measurement period, controlling the emitting groups to emit the laser beams asynchronously based on the preset rule.

First claim

What is claimed is:

1. A LiDAR controlling method for controlling a LiDAR, wherein the LiDAR comprises a laser emitting array and a laser receiving array, and the method comprises:
in a measurement period, determining an emitting group to be started in the measurement period from a laser emitting array, wherein the emitting group comprises at least two emitting units, and physical positions of the at least two emitting units meet a condition of no optical crosstalk;
controlling the at least two emitting units to emit laser beams asynchronously based on a preset rule;
controlling a receiving unit group of the laser receiving array corresponding to the emitting group to receive laser echoes formed after the laser beams are reflected by a target object; and
when at least two emitting groups are determined in the measurement period, controlling the at least two emitting groups to emit the laser beams asynchronously based on the preset rule, wherein controlling the receiving unit group of the laser receiving array corresponding to the emitting group to receive the laser echoes comprises controlling the receiving unit group of the laser receiving array corresponding to each of the at least two emitting groups respectively to receive the laser echoes.

2. The LiDAR controlling method according to claim 1 , wherein the controlling the at least two emitting units to emit laser beams asynchronously based on the preset rule comprises:
according to a time coding sequence corresponding to one of the at least two emitting units that is for a K th emission, controlling the emitting unit of the K th emission to emit a laser beam at a first corresponding time, wherein K is an integer greater than or equal to 1; and
after a first preset duration threshold expires, according to a time coding sequence corresponding to one of the at least two emitting units that is for a (K+1) th emission, controlling the emitting unit for the (K+1) th emission to emit a laser beam at a second corresponding time.

3. The LiDAR controlling method according to claim 2 , wherein a method for determining a time coding sequence corresponding to any one of the emitting units in the emitting group comprises:
based on a first preset sequence, generating a series of pseudo-random sequences via a linear feedback shift register to obtain a plurality of pseudo-random sequences;
determining an autocorrelation function of each of the plurality of pseudo-random sequences;
determining, according to the autocorrelation functions and from the plurality of pseudo-random sequences, a pseudo-random sequence whose autocorrelation coefficient is less than a first specified threshold; and
selecting one pseudo-random sequence from the determined pseudo-random sequence as the time coding sequence corresponding to any one of the emitting units.

4. The LiDAR controlling method according to claim 1 , wherein the controlling the at least two emitting groups to emit the laser beams asynchronously based on the preset rule comprises:
sequentially controlling each of the at least two emitting groups to emit the laser beams according to a preset emitting timing sequence, wherein an emitting time of a first emitting unit of each of the at least two emitting groups in a same measurement period has an emitting time interval of a second preset duration threshold.

5. The LiDAR controlling method according to claim 1 , wherein the physical positions of the at least two emitting groups meet the condition of no optical crosstalk, and the controlling the at least two emitting groups to emit the laser beams asynchronously based on the preset rule comprises:
controlling each of the at least two emitting groups to emit laser beams in parallel, wherein the emitting units in a same emitting order in the at least two emitting groups emit laser beams based on time coding sequences corresponding to the emitting units in the same emitting order, and a cross-correlation coefficient between the time coding sequences corresponding to the emitting units in the same emitting order in adjacent emitting groups is less than a second specified threshold.

6. The LiDAR controlling method according to claim 1 , wherein a physical positional relationship of the at least two emitting units is determined based on power, an angle of view, and a detection distance of each of the at least two emitting units.

7. The LiDAR controlling method according to claim 1 , wherein the controlling the at least two emitting groups to emit the laser beams asynchronously based on the preset rule includes:
sequentially controlling each of the at least two emitting groups to emit the laser beams according to a preset emitting timing sequence, where an emitting time of a first emitting unit of each of the at least two emitting groups in a same measurement period has an emitting time interval of a second preset duration threshold.

8. A LiDAR controlling device for controlling a LiDAR, wherein the LiDAR comprises a laser emitting array and a laser receiving array, and the LiDAR controlling device comprises:
a determining module, configured to determine, in a measurement period, an emitting group to be started in the measurement period from the laser emitting array, wherein the emitting group comprises at least two emitting units, and physical positions of the at least two emitting units meet a condition of no optical crosstalk;
a first control module, configured to control the at least two emitting units to emit laser beams asynchronously based on a preset rule; and
a second control module, configured to control a receiving unit group of the laser receiving array corresponding to the emitting group to receive laser echoes formed after the laser beams are reflected by a target object.

9. An electronic apparatus, comprising a storage, a processor, and computer program that is stored in the storage and capable of running on the processor, wherein the processor implements a LiDAR controlling method for controlling a LiDAR when executing the computer program, and wherein the LiDAR comprises a laser emitting array and a laser receiving array, and the method comprises:
in a measurement period, determining an emitting group to be started in the measurement period from a laser emitting array, wherein the emitting group comprises at least two emitting units, and physical positions of the at least two emitting units meet a condition of no optical crosstalk;
controlling the at least two emitting units to emit laser beams asynchronously based on a preset rule;
controlling a receiving unit group of the laser receiving array corresponding to the emitting group to receive laser echoes formed after the laser beams are reflected by a target object; and
when at least two emitting groups are determined in the measurement period, controlling the at least two emitting groups to emit the laser beams asynchronously based on the preset rule, wherein controlling the receiving unit group of the laser receiving array corresponding to the emitting group to receive the laser echoes comprises controlling the receiving unit group of the laser receiving array corresponding to each of the at least two emitting groups respectively to receive the laser echoes.

Assignees

• Suteng Innovation Tech Co Ltd

Inventors

• Gong Changsheng
• Feng Xi

Classifications

• G01S7/497

  Means for monitoring or calibrating · CPC title

• G01S7/4861

  Circuits for detection, sampling, integration or read-out · CPC title

• G01S7/4815 Primary

  using multiple transmitters · CPC title

• Y02A90/10

  Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation · CPC title

• G01S7/4817

  relating to scanning · CPC title