一种用于圆柱面轮廓的高精度多光束光学测量方法。

A High-Precision Multi-Beam Optical Measurement Method for Cylindrical Surface Profile.

作者信息

Zhou Yinghong, Wu Zhiliang, Cai Nian, Zhan Daohua, Xu Shaoqiu, Chen Meiyun, Zhou Guang, Wang Han

机构信息

School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China.

School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China.

出版信息

Micromachines (Basel). 2023 Aug 3;14(8):1555. doi: 10.3390/mi14081555.

DOI:10.3390/mi14081555

PMID:37630091

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10456249/

Abstract

To automatically measure the surface profile of a cylindrical workpiece, a high-precision multi-beam optical method is proposed in this paper. First, some successive images for the cylindrical workpiece's surface are acquired by a multi-beam angle sensor under different light directions. Then, the light directions are estimated based on the feature regions in the images to calculate surface normal vectors. Finally, according to the relationship of the surface normal vector and the vertical section of the workpiece's surface, a depth map is reconstructed to achieve the curvature surface, which can be employed to measure the curvature radius of the cylindrical workpiece's surface. Experimental results indicate that the proposed measurement method can achieve good measurement precision with a mean error of the curvature radius of a workpiece's surface of 0.89% at a reasonable speed of 10.226 s, which is superior to some existing methods.

摘要

为自动测量圆柱形工件的表面轮廓，本文提出一种高精度多光束光学方法。首先，多光束角度传感器在不同光照方向下采集圆柱形工件表面的一些连续图像。然后，基于图像中的特征区域估计光照方向，以计算表面法向量。最后，根据表面法向量与工件表面垂直截面的关系，重建深度图以获得曲面，该曲面可用于测量圆柱形工件表面的曲率半径。实验结果表明，所提出的测量方法能够以10.226秒的合理速度实现良好的测量精度，工件表面曲率半径的平均误差为0.89%，优于一些现有方法。