超大尺度线结构光传感器三维测量系统外参数标定

Extrinsic Parameters Calibration of Three-Dimensional Measurement System for Ultra-Large Scale Line-Structured Light Sensor

为了满足大型自由曲面工件高精度实时三维测量的需求,设计了一种超大尺度线结构光传感器三维测量系统,并提出一种基于一维靶标的传感器外参数的现场标定方法。实验结果表明,该方法的标定精度与基于平面靶标的方法相当,且其一维靶标的高精度制作更容易,外参数的现场标定过程操作更方便,更适合超大尺度线结构光传感器的现场标定。

In order to meet the requirements of high-precision real-time three-dimensional measurement of large-size free-form surface workpieces,a three-dimensional measurement system for an ultra-large scale line-structured light sensor is designed and an onsite calibration approach for the extrinsic parameters of this sensor based on onedimensional targets is proposed.The experimental results show that the proposed calibration method has a equivalent accuracy to compare with that of the planar-target-based method.Moreover,the proposed calibration method is easier for the accurate fabrication of the one-dimensional targets,more convenient for the onsite calibration process of the extrinsic parameters,and more suitable for the calibration of ultra-large scale linestructured light sensor.