Distributed laser radar

Abstract

The invention discloses distributed laser radar. The distributed laser radar includes: a light generating unit, an information processing unit and a plurality of detection scanning units; the light generating unit is used for generating frequency modulation continuous waves and splitting the frequency modulation continuous waves to each detecting scanning unit for the first time; each detection scanning unit is used for splitting the frequency modulation continuous waves after primary splitting again to form a detection light beam and a reference light beam, emitting the detection light beam,receiving an echo light beam reflected by a target object in a target area, and determining relevant information of the target area according to the reference light beam and the echo light beam; and the information processing unit is used for integrating the relevant information of each target area to obtain a point cloud picture of the peripheral area of the distributed laser radar. The technicalscheme provided by the embodiment of the invention can enhance the detection real-time performance of the target objects in the target areas and can improve the speed measurement precision.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of laser detection, and in particular to a distributed laser radar. Background technique [0002] Lidar is a radar system that emits laser beams to detect the position, speed and other characteristic quantities of target objects. The working principle of the laser radar is: to transmit a detection signal (laser beam) to the target object, and then compare the received signal reflected from the target object (target echo, or echo signal) with the transmitted signal for appropriate processing The relevant information of the target object can be obtained, such as the target distance, azimuth, height, speed, attitude, and even shape parameters, so as to detect, track and identify the target object. [0003] Currently, lidar systems are usually pulsed lidars, which measure the distance to a target object by measuring the time the pulse travels. When the laser radar is applied to the vehicl...

AI Technical Summary

Problems solved by technology

However, the existing pulse lidar generally calculates the moving speed of the target object through multiple frames of data, resulting in poor real-time performance of the lidar and low speed measurement accuracy

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