Ranging method of laser radar system and laser radar system

A technology of laser radar and ranging method, which is applied in the field of ranging and can solve problems such as human eye safety cannot be effectively solved

Pending Publication Date: 2019-11-15
HESAI TECH CO LTD
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Therefore, the above method cannot effe...

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  • Ranging method of laser radar system and laser radar system
  • Ranging method of laser radar system and laser radar system
  • Ranging method of laser radar system and laser radar system

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[0049] In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] The first embodiment of the present invention relates to a ranging method of a laser radar system. figure 1 is a flow chart of the ranging method of the laser radar system according to the first embodiment of the present invention.

[0051] Specifically, such as figure 1 As shown, the ranging method of the lidar system includes:

[0052] Step 102, tra...

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Abstract

The invention relates to the field of ranging, in particular to a ranging method of a laser radar system and the laser radar system. The ranging method of the laser radar system comprises steps as follows: first pulse of first energy is emitted; an echo signal corresponding to the first pulse is received; whether an obstacle exists in a preset distance is judged according to the echo signal; whenno obstacle exists in the preset distance, second pulse of second energy is emitted in the emitting direction of the first pulse corresponding to the judged echo signal, the second energy is higher than the first energy, and when the obstacle exists in the preset distance, the second pulse is not emitted in the emitting direction of the first pulse corresponding to the judged echo signal. On the premise that complexity of the system structure is not increased, the laser radar meets the requirement of human eye safety, meanwhile, a single pulse energy threshold value of the ranging pulse is increased, the remote measurement performance is ensured, and the cost is low.

Description

technical field [0001] The invention relates to the field of ranging, in particular to a ranging method of a laser radar system and a laser radar system. Background technique [0002] As a high-precision active three-dimensional imaging sensor, lidar has the characteristics of high resolution and less interference from the environment. Lidar calculates distance by measuring the time-of-flight of laser pulses through space. Usually, the rotating laser radar emits laser light from the optical window, and the laser radar emits laser light in different vertical directions while rotating, so as to obtain three-dimensional distance information. The ranging performance of lidar depends largely on the energy level of the laser pulse. At the same time, lidar needs to meet the Class 1 level defined by the laser product safety standard IEC 60825-1, that is, human eye safety. The laser energy threshold corresponding to human eye safety is related to the number of laser pulses receive...

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Application Information

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IPC IPC(8): G01S17/08G01S17/02
CPCG01S17/08G01S7/484G01S17/931G01S17/42G01S17/10G01S7/4868G01S17/04
Inventor 孙恺向少卿
Owner HESAI TECH CO LTD
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