Laser radar

Abstract

The invention provides a laser radar. The laser radar comprises a laser emitting module, a light division module, a scanning module and a receiving module; the laser emitting module is used for emitting pulsed laser beams; the light division module is used for dividing the pulsed laser beams into N incident beams and transmitting the incident beams to the scanning module, wherein N is larger thanor equal to 2; the scanning module is used for reflecting the N incident beams to a three-dimensional space and receiving and reflecting N echo beams, reflected by a to-be-tested target in the three-dimensional space, of the N incident beams; the receiving module is used for receiving and processing the N echo beams; the light division module and the scanning module correspondingly form N subsidiary scanning view fields, and the N subsidiary scanning view fields constitute a total view field of the laser radar through view field splicing. By means of the laser radar, the light division moduleis utilized, light sources simply with the number smaller than N can be adopted on the premise of satisfying a scanning view field of the laser radar, the cost of the laser radar is lowered, the heatgenerated inside is reduced, and the size of the laser radar is reduced.

Description

technical field [0001] The invention relates to the technical field of environment perception, in particular to a laser radar. Background technique [0002] In the autonomous driving technology, the environmental perception system is a basic and crucial part, which guarantees the safety and intelligence of the autonomous vehicle. Among the environmental perception sensors, the laser radar has the advantages of reliability, detection range and ranging accuracy. Has incomparable advantages. [0003] As an important sensor for perceiving surrounding information, vehicle-mounted lidar has field of view and scanning accuracy as its important parameters. For the horizontal field of view, the existing technology usually enlarges the field of view by setting an optical lens in front of the scanning device, or sets up multiple lidars to splice the fields of view collected by them. The method of expanding the field of view of the front lens group requires a more complex lens group, ...

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the technical problems of high cost and large volume of laser radar in the prior art

Images