针对现有线结构光双传感器测量系统标定过程中对设备要求高、标定过程复杂等难题, 提出了一种简便的基于平面标定参照物的现场标定方法。该方法不需要设计复杂的校准模型和高精度的辅助调整设备, 只需要将一个绘制有棋盘格图案的平面参照物在两个传感器公共的测量范围内任意摆放几个位置, 即可完成双传感器标定, 并建立两个传感器之间的相互关系, 进一步将多个局部世界坐标系下的标定特征点统一到一个全局世界坐标系中, 从而建立起两个传感器与线结构光平面间的标定方程。实验验证了该方法的可行性, 实测平面高度的均方根(RMS)误差为0.03 mm。

A simple and real-time calibration method has been presented to solve the calibration problems in two-sensor measurement system based on line-structure light such as requirement of high accuracy calibration model, complicate calibration procedure and so on, it does not need a complicated and elaborate three-dimensional (3D) calibration model but to place a two-dimensional (2D) calibration plane at several arbitrary places in the homology range of two sensors. The relationships between the line-structure-light plane and the two sensors are established after merging the calibration data of every local world coordinates into a global world coordinate. The height root-mean-square (RMS) error of the measured plane reaches 0.04 mm in the experiment.