Laser radar debugging device and debugging method

Abstract

The invention provides a laser radar debugging device and a debugging method, relates to the technical field of laser radars. The device and method are used for debugging a laser radar transmitting end comprising a laser group and a laser lens group, and semiconductor laser diodes are distributed on the laser group. The laser radar debugging device comprises a debugging table, a fixing support, an adjusting support, a testing plate, a shooting device, a divergence angle measuring mechanism and a processing mechanism; the fixing support is used for fixing a laser lens group, the adjusting support is used for adjusting the laser lens group, the testing plate is arranged relative to the debugging table, and a reference mark is drawn on the testing plate. The shooting device is used for shooting the test plate, the divergence angle measuring mechanism is used for measuring a laser beam collimated by the laser lens group, and the processing mechanism is used for displaying measurement results of the shooting device and the divergence angle measuring mechanism and determining an adjustment result. The laser radar debugging device and method can adjust the azimuth angle and the divergence angle at the same time, debugging is easy and convenient, and the debugging efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a laser radar debugging device and a debugging method. Background technique [0002] With the development of optoelectronic technology, lidar is more and more widely used in scenarios such as automatic driving, surveying and mapping, robot navigation, and space modeling. At the same time, the requirements for ranging capabilities of lidar are getting higher and higher. Most of the mechanical laser radars currently used for autonomous driving are based on the principle of pulsed laser ranging, and most of the lasers used are semiconductor lasers. Semiconductor lasers are small in size, light in weight, safe in use, and low in maintenance costs, so their application fields are expanding day by day. However, semiconductor lasers have the following disadvantages: the performance is greatly affected by temperature, the divergence angle of the beam is large (generally between a fe...

AI Technical Summary

Problems solved by technology

However, semiconductor lasers have the following disadvantages: the performance is greatly affected by temperature, the divergence angle of the beam is large (generally between a few degrees and 20 degrees, and there is astigmatism between the fast axis and the slow axis of the semiconductor laser, the fast axis and the slow axis There is a big difference in the divergence angle, the divergence angle in the fast axis direction is much larger than the divergence angle in the slow axis direction), so it is poor in directionality, monochromaticity and coherence.

[0003] The existing laser radar launch and debugging scheme in the industry mainly adopts that multiple semiconductor lasers are placed on a circuit board, and multiple circuit boards are placed side by side at the same time. Each circuit board is independently movable, so it can effectively solve the laser problem. The resolution of the vertical field of view of the radar is too low. However, each circuit board needs to be debugged independently. When the field of view of the lidar is large and the vertical resolution is high, more circuit boards need to be debugged. , resulting in long debugging time and great difficulty; and because there are too many movable parts, it is difficult to fix after debugging, and each movable part needs to be fixed, and the productivity is poor

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