Multi-laser power balance control method for laser radar

Abstract

The invention relates to a multi-laser power balance control method for a laser radar. The method comprises the steps that a light emitting instruction is sent to a laser radar, wherein the laser radar comprises a plurality of lasers, and the light emitting instruction is used for controlling the lasers to emit light; a measurement result of an optical power measurement device is received, wherein the measurement result comprises the light emitting power of a target laser in the multiple lasers; and under the condition that the measurement result indicates that the light emitting power of the target laser is out of a preset range, the light emitting parameter of the target laser is adjusted according to the measurement result, and the light emitting power is further adjusted until the actual light emitting power of the target laser is converged in the preset range. According to the invention, unified measurement and correction only need to be carried out in the use stage until the light emitting power of all the lasers in the same laser radar is adjusted to be within the preset range, so that the requirement for the consistency of the lasers is reduced, and the technical problem that the power difference of the multiple lasers of the laser radar can be hardly reduced is solved.

Description

technical field [0001] The present application relates to the technical field of laser radar, in particular to a power balance control method for multiple lasers of laser radar. Background technique [0002] Lidar (LIDAR) measures the position, speed and other information of the target object by emitting a laser beam to the target object and receiving the beam reflected from the target object. In order to increase the field of view of a single laser radar, multiple laser transceiver units are often used inside the laser radar to achieve a larger field of view coverage. However, multiple lasers will have individual differences, even under the same working conditions, there will be differences in output power, and the differences between these lasers will be further enlarged under special harsh working conditions. The increase in the power difference of lasers between different fields of view will lead to increased errors in ranging distance and gray scale between different f...

AI Technical Summary

Problems solved by technology

[0004] This application provides a power balance control method for multiple lasers in lidar to solve the technical problem of the power difference of multiple lasers in lidar

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