Distributed laser radar system and laser ranging method

Abstract

The embodiment of the invention provides a distributed laser radar system and laser ranging method. The distributed laser radar system comprises an optical receiving and transmitting part and a plurality of scanning parts, the optical receiving and transmitting part comprises a plurality of optical receiving and transmitting groups, wherein each optical receiving and transmitting group is corresponding to one scanning part, each optical receiving and transmitting group comprises a laser transmitter and a laser receiver; and the distributed laser radar system also comprises transmitting opticalfibers in one to one correspondence with the laser transmitters, and receiving optical fibers in one to one correspondence with the laser receivers. In the distributed laser radar system provided bythe embodiment of the invention, each laser transmitter is corresponding to one transmitting optical fiber, each laser receiver is corresponding to one receiving optical fiber, and thus, device maintenance and repair cost can be reduced

Description

technical field [0001] The invention relates to the technical field of laser detection and ranging, in particular to a laser radar system and a laser ranging method. Background technique [0002] Light Detection And Ranging (LiDAR) systems are often referred to as lidar systems. The basic working principle of lidar is that the laser transmitter emits laser light to the target object, the receiver receives the emitted light of the target object, and the lidar calculates the distance from the lidar to the target object according to the principle of laser ranging. Among them, a laser transmitter and a receiver form a laser ranging channel. When the laser continuously scans the target object, the data of all the target points on the target object can be obtained, and the three-dimensional image of the target object can be obtained after imaging processing of the data. [0003] A common 3D lidar is a mechanical rotating lidar, which contains multiple pairs of laser transmitters...

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Problems solved by technology

[0004] The laser transmitter and receiver of each laser ranging channel of the mechanically rotating lidar need to be precisely calibrated to ensure accurate focusing, precise parallelism of the transmitting and receiving optical axes, and a small gap between adjacent laser ranging channels. And precise angular interval, but because the laser transmitter and receiver are rotating at high speed with the mechanical rotating lidar, the stability of the mechanical rotating lidar is low

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