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介绍了作为大型机载激光雷达关键部件的双光楔扫描系统的模型建立、设计实现以及实验验证。为实现双光楔扫描系统的大尺寸、宽视场和高精度指向,设计了16°楔角、320 mm直径的成对光楔,以及对应的高精度PID双轴扫描控制模块,分析了系统误差来源和误差控制方法。在45 m距离的地面测试中,通过每个3.6°转动楔镜,累计100次与真值测量比对进行检校和验证,扫描指向误差小于50μrad,通过搭载集成后的机载激光雷达飞行实验,实测扫描视场为32.03°,进一步验证了双光楔扫描系统的有效性。
The modeling, design and experimental verification of double wedge scanning system as a key component of large airborne lidar are introduced. In order to realize the large size, wide field of view and high precision pointing of double wedge scanning system, a wedge angle of 16 °, a pair of wedges with 320 mm diameter and a corresponding high precision PID biaxial scanning control module are designed. The system Sources of error and error control methods. In the ground test at a distance of 45 m, calibration and verification were carried out with a total of 100 measurements with a true value by rotating a wedge mirror at 3.6 ° with a scanning error of less than 50 μrad. The integrated flight-lidar flight test , The measured field of view was 32.03 °, further verifying the effectiveness of double wedge scanning system.