Multi-line laser radar

Abstract

A multi-line laser radar comprises a first radar assembly, and the first radar assembly comprises n laser devices, an optical alignment unit, a scanning rotating mirror and a detector, wherein n is larger than 1. Each laser device is used for emitting one way of laser beam to the optical alignment unit; the optical alignment unit is used for aligning the n ways of laser beams, and the aligned n ways of laser beams are shot towards target reflection mirrors of the scanning rotating mirror; the scanning rotating mirror comprises the m reflection mirrors rotating around a rotary shaft, and the rotating plane of the rotary shaft is perpendicular to the arrangement direction of the aligned n ways of laser beams, wherein m is larger than 1; the target reflection mirrors are used for reflecting the received aligned n ways of laser beams to a detection area of the first radar assembly; and the detector is used for receiving reflected echo signals of the n ways of laser beams in the detection area. The multi-line laser radar is of a multi-emit and one-receive structure, signal crosstalk among different detectors is avoided, the working performance is improved, and the cost is lowered.

Description

technical field [0001] The embodiment of the present application relates to the technical field of laser detection, in particular to a multi-line laser radar. Background technique [0002] Lidar is a radar system that detects the position, speed and other characteristic quantities of the target by emitting laser beams. LiDAR can be divided into peripheral-looking LiDAR and forward-looking LiDAR according to the detection range. Among them, the detection range of the surrounding-looking lidar is 360 degrees, and the detection range of the forward-looking lidar is 90 degrees to 110 degrees directly ahead. Compared with the surrounding-looking lidar, the redundant information in the information detected by the forward-looking lidar is less, which is more in line with the development trend of the intelligent transportation field. [0003] At present, the forward-looking lidar usually adopts the structure of "one emission and multiple reception", that is, one laser emits a lase...

AI Technical Summary

Problems solved by technology

[0004] Due to the large number of detectors in the lidar, and the detectors need to work under high frequency and high voltage conditions, subject to the volume limitation of the lidar, the distance between the detectors is limited, so the signal between the detectors The crosstalk is serious, which makes the working performance of the lidar unstable

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