Multi-line lidar

Abstract

A multi-line laser radar, including a first radar component, the first radar component includes n lasers, an optical collimation unit, a scanning mirror and a detector, n is greater than 1; each laser is used for optical collimation The unit emits one laser beam; the optical collimation unit is used to collimate n laser beams, and the collimated n laser beams are directed to the target mirror of the scanning mirror; the scanning mirror includes m rotating around the rotation axis Reflector, the rotation plane of the rotation axis is perpendicular to the arrangement direction of the collimated n-path laser beams, and m is greater than 1; the target reflector is used to reflect the received collimated n-path laser beams to the first radar assembly The detection area; the detector is used to receive the echo signals of the reflected n laser beams in the detection area. The present application provides a multi-line lidar structure of "multi-transmission-reception", which avoids signal crosstalk between detectors, improves work performance, and reduces costs.

Description

Technical field[0001]The embodiments of the present application relate to the field of laser detection technology, in particular to a multi-line lidar.Background technique[0002]Lidar is a radar system that detects the position and speed of the target by emitting laser beams. According to the detection range, lidar can be divided into peripheral-looking lidar and forward-looking lidar. Among them, the detection range of the peripheral-looking lidar is 360 degrees, and the detection range of the forward-looking lidar is 90 degrees to 110 degrees directly in front. Compared with the peripheral-looking lidar, the forward-looking lidar has less redundant information in the information detected, which is more in line with the development trend of the intelligent transportation field.[0003]At present, the forward-looking lidar usually adopts a "one-transmit, multiple-receive" structure, that is, one laser emits a laser beam, and multiple detectors receive the echo signals of the above-ment...

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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