Laser radar

Abstract

The invention provides a laser radar, comprising multiple transceiving modules and at least one scanning module, the multiple transceiving modules are used for transmitting a pulse laser beam and receiving an echo signal, reflected by a to-be-detected target, of the pulse laser beam, and the at least one scanning module is used for reflecting the pulse laser beam transmitted by the multiple transceiving modules to a three-dimensional space and is also used for reflecting the echo signal to a corresponding transceiving module; the multiple transceiving modules are horizontally arranged side byside, the scanning module is located at one side of the multiple transceiving modules, emergent surfaces of the multiple transceiving modules are respectively towards the at least scanning module, each transceiving module accordingly detects one sub scanning field of view, and multiple sub scanning fields of view form a total field of view of the laser radar through splicing of the fields of view.The laser radar provided by the invention has the advantages that a scanning field of view of the whole laser radar is increased by utilizing and splicing the multiple sub scanning fields of view; each transmitting module comprises multiple light sources which are arranged in a vertical direction at intervals, so that linear density of a scanning trace of a vertical field of view is effectively increased; and multiple light sources adopt time-sharing transmitting, so that interference of a receiving light path 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, and it is the guarantee of the safety and intelligence of the autonomous driving vehicle. The lidar in the environmental perception sensor has great advantages in terms of reliability, detection range, and ranging accuracy. 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 vertical field of view, the greater the density of scanning trajectory lines in the vertical direction, the higher the scanning resolution and the richer the information, which is more conducive to automatic driving decision-making. For laser radars that use scanning methods such as galvanometers, the dens...

AI Technical Summary

Problems solved by technology

However, the existing lidar is difficult to achieve a balance between small size and multiple performance parameters. How to reasonably arrange the internal space of the lidar, improve the space utilization rate and make the structure more compact under the premise of satisfying the specific optical path design Optimization and improvement of heat dissipation performance are still areas that need to be improved urgently

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