Ranging method of laser radar system and laser radar system

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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Problems solved by technology

Therefore, the above method cannot effectively solve the problem of human eye safety.

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