A multi-beam laser radar with non-uniform pulse energy

Abstract

A multi-beam laser radar having a non-uniform pulse distribution. The multi-beam laser radar comprises a control unit, a pulse drive unit, and a pulse laser emission unit. The control unit controls the pulse drive unit to generate a drive signal. The pulse laser emission unit is driven by the drive signal to emit laser pulses. The drive signal is adjusted such that the laser pulses are non-uniformly distributed within a field of view.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a multi-beam laser radar with non-uniform pulse energy. Background technique [0002] Lidar analyzes the turn-back time after the laser encounters the target object by emitting and receiving the laser beam, calculates the relative distance between the target object and the vehicle, and uses the three-dimensional coordinates and reflectivity of a large number of dense points on the surface of the target object collected during this process and other information, and quickly reconstruct the 3D model of the measured target to achieve the purpose of environmental perception. In terms of effect, the more lidar harnesses, the more points collected per second, the higher the measurement accuracy, and the higher the security. The existing multi-beam laser radars in the market, such as Velodyne HDL-64E and Pandar 40, include multiple laser transmitters with basically the same output ...

AI Technical Summary

Problems solved by technology

The problem with the current beam distribution setting method is that at a distance from the lidar, the laser beams on the upper and lower edges of the vertical field of view are mostly irradiated to the sky or the ground and are wasted. The detection distance and horizontal angular resolution of the laser radar are insufficient, and the accuracy of obstacle recognition is low

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