Multi-line laser radar

Abstract

The invention relates to the technical field of laser radars, and discloses a multi-line laser radar. Through the creation of the invention, a novel multi-line laser radar scheme capable of simplifying a light path structure is provided, that is, on one hand, a laser galvanometer, a diffraction grating, a cavity mirror and a reflection grating are configured in a laser emergent light path in sequence, so that laser with different wavelengths can be emitted in a time-division manner by using a single laser emitter, and multi-line laser is emitted to illuminate external objects; on the other hand, a reflection grating and a focus lens are configured in a laser reflection light path in sequence, so that the retroreflection laser with different wavelengths can be focused on the same laser detector, and then the single laser emitter and the single laser detector can be utilized to realize the detection function of the multi-line laser radar, the number of required devices can be reduced, the optical adjustment difficulty and the production cost of the whole machine can be greatly reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a multi-line laser radar. Background technique [0002] Lidar is a radar system that emits laser beams to detect characteristic quantities such as distance, position, and speed of target objects. Because of its excellent characteristics, lidar ranging plays an indispensable role in the perception link in the field of intelligent sports. Since multi-line lidar can provide real-time three-dimensional environmental information, it can better assist smart devices to make accurate judgments in the perception process. [0003] The existing mainstream multi-line lidar mostly adopts a mechanical rotary structure, that is, the measurement is performed in a one-to-one correspondence between the transmitter and the receiver, and the motor is used to drive the entire optical system to rotate to measure three-dimensional environmental information. However, this existing solu...

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Problems solved by technology

[0004] In order to solve the problems of the existing multi-line laser radar solutions that require more components, complex optical adjustment and high production cost of the whole machine, the purpose of the present invention is to provide a new type of multi-line laser radar, which can use a single laser to emit The device and a single laser detector can also realize the detection function of multi-line laser radar, which can not only reduce the number of required components, but also greatly reduce the difficulty of optical assembly and the production cost of the whole machine, improve production efficiency, and facilitate practical application and to promote

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