固体激光测风雷达扫描镜旋转控制系统

Design of the Scanning System of Wind Lidar

多普勒激光测风雷达是近年来方兴未艾的 1种全新的大气风场探测手段。但是激光测风雷达直接测量的是视线方向上的激光反射光的频移 (视线风速 )。在这个基础上 ,激光雷达还必须能够获得多方位的风速数据才能够反演出风场。这就需要相应的光学扫描系统 ,它在保证发射、接收视场重叠的前提下 ,控制激光束投射到指定的方向 ,使激光雷达获得不同视线角度的风速数据。本文介绍的激光雷达测风系统中的光学扫描部分实现了上述要求 ,在水平旋转和俯仰控制上的精度都达到了<0 .5°。完全能够满足激光测风系统的实用需要。

Wind lidar is a new means for detecting wind speed in the atmosphere. It can effect accurate real-time detection. To a wind lidar system, a reliable scanning system is necessary . This article describes a means to realize the scanning system . The finished system has three parts: a mechanical frame,an MPU circuit and PC software. The final indexes of the system are that the accuracy is less than 0.5 degree and the scanning range is 2π in solid angle.