Laser scanning device and scanning method

Abstract

The invention discloses a laser scanning device which comprises a laser array and a detector array which are respectively used for emitting laser beams to a target object and receiving the laser beamsreflected by the target object; the multi-layer scanning prism comprises a plurality of sub-scanning prisms, each sub-scanning prism comprises a plurality of scanning mirror surfaces, and the plurality of scanning mirror surfaces rotate around the same rotating shaft; wherein the normal of each scanning mirror surface and the rotating shaft form a space angle, and the angles of the formed space angles are not completely the same; and the control and processing circuit is used for controlling the laser array to emit a plurality of laser beams and controlling and driving the multi-layer scanning prism to rotate uninterruptedly so as to realize scanning of a target object. The vertical scanning view field angle of the scanning device can be effectively increased, the number of central scanning view field scanning lines can be effectively increased, and specific requirements of different application scenes are met.

Description

technical field [0001] The invention relates to the technical field of laser scanning, in particular to a laser scanning device and a scanning method. Background technique [0002] Lidar is a radar system that emits laser beams to detect the position, speed and other characteristics of the target. It has the advantages of high accuracy, fast operation speed and high efficiency. It is widely used in automotive automatic driving, robot positioning and navigation, space environment mapping, security Security and other fields. [0003] At present, the laser radar system mainly transmits the laser signal to the target object through the internal laser transmitting unit, and receives the echo signal reflected from the target object through the internal laser receiving unit, and records the laser signal from emission to reception. The time difference and the depth information of the target object are calculated, and the intensity information of the target is obtained from the echo...

AI Technical Summary

Problems solved by technology

In the existing mechanical scanning laser radar, each laser emitting unit can only obtain one scanning line, that is to say, in order to obtain multiple scanning lines, it is necessary to set up multiple laser emitting units and their corresponding laser receiving units, thus As a result, the number of components required inside the equipment is relatively large, which is inconvenient to compress the volume and the cost is high; range and even 360-degree scanning

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