光学学报, 2019, 39 (8): 0812002, 网络出版: 2019-08-07   

激光束空间位姿高精度标定方法 下载: 855次

Calibration Method for Spatial Pose of Laser Beam with High-Accuracy
作者单位
天津大学精密测试技术与仪器国家重点实验室, 天津 300072
摘要
关节型激光传感器是新型的跨尺度空间、非接触三维坐标测量仪器。为使关节型激光传感器实现精密测量,需要精确标定其系统参数,尤其是标定激光束的空间位姿。提出一种基于平面靶标和球靶标相结合的激光束空间位姿标定方法。通过建立像素坐标系和世界坐标系的矩阵关系,得到激光点的三维坐标,进而通过直线拟合得到激光束的空间位姿。转台旋转轴的空间位姿通过最小区域圆拟合得到。实验结果表明,在1 m的测量范围内,传感器系统的最大距离测量误差约为0.05 mm,新标定方法准确有效。
Abstract
An articulated laser sensor is a new kind of trans-scale and non-contact 3D coordinate metrological instrument. In order to achieve precise measurement, the system parameters should be calibrated with high-accuracy, especially the spatial pose of laser beam. A calibration method for the spatial pose of laser beam based on the combination of planar target and spherical target is proposed in this paper. The 3D coordinate of laser spots can be obtained by establishing matrix relation between the pixel coordinate system and the world coordinate system. Then the spatial pose of laser beam can be determined by linear fitting, and the spatial poses of rotation axes can be obtained by minimum-zone circle fitting. The experimental results show that the maximum distance measuring error is about 0.05 mm in the measuring range of 1 m, and the novel calibration method is precise and effective.

段晓登, 吴斌, 康杰虎. 激光束空间位姿高精度标定方法[J]. 光学学报, 2019, 39(8): 0812002. Xiaodeng Duan, Bin Wu, Jiehu Kang. Calibration Method for Spatial Pose of Laser Beam with High-Accuracy[J]. Acta Optica Sinica, 2019, 39(8): 0812002.

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