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针对同轴米散射激光雷达,提出了判断出射激光束光轴和望远镜光轴是否同轴的准直判据。以判据最大化为控制目标,以二维电动镜架为执行机构,采用变步长调节算法,设计了同轴米散射激光雷达自准直系统。实验结果表明该系统可实现高精度快速自准直调节,调节精度可达0.05mrad,验证了准直判据和调节算法的有效性。这有利于实现激光雷达系统的自动化和无人值守。
For the collimating rice scattering lidar, a criterion of collimation is proposed to determine whether the optical axis of the outgoing laser beam and the optical axis of the telescope are coaxial. In order to maximize the criterion as the control target, a two-dimensional electric frame as the actuator, a variable step size adjustment algorithm is used to design a coaxial self-collimation laser radar collimation system. The experimental results show that the system can achieve high-precision fast self-aligning adjustment with the accuracy of 0.05 mrad, which verifies the validity of the collimation criterion and the adjustment algorithm. This facilitates the automation and unmanned use of Lidar systems.