提出一种基于激光与CCD的复合式测量方法, 结合二者的优势, 通过测量同一标准球球心的位置标定出了二者光轴的位置关系, 有效地把二者测量的数据融合到同一个坐标系中, 从而实现高精度的3维测量。在对所测靶丸表面数据进行去噪处理后, 采用拟牛顿法, 以CCD所测惯性约束聚变(ICF)靶丸直径作为部分待求参数的初始值, 可以有效避免该方法容易陷入局部最优化的缺陷。从而快速、准确地实现靶丸球度误差的测量。分别在两种测量模式下进行了实验, 结果验证了该方法的有效性与鲁棒性。

A novel compound measuring method for sphericity error detection of ICF target is proposed. Combining the advantages of laser probe and CCD camera, this method can effectively integrate the data captured by laser probe and CCD camera into the same coordinate system by means of calibrating the position relationship of the two optical axes with a standard ball. The quasi-Newton method is employed to process the measured data with the noise data eliminated. Meanwhile, the diameter of target derived by CCD camera is used as partial initial conditions, which prevents the occurrence of local optimization due to inappropriate initial parameter selection. The experiment has been carried out on the experiment platform of a compact five-coordinate measuring machine under two kinds of measuring mode, demonstrating the validity and robustness of this method．