基于聚类分割的圆线结构光光刀中心提取方法研究  

Laser Center Extraction Method of Circular Linear Structure Profile Measurement Based on Cluster Segmentation

作　　者：严兴旭 杜虎兵[1] 冯雷洁 李燕杰 贾晋葛 张高鹏[3] YAN Xingxu;DU Hubing;FENG Leijie;LI Yanjie;JIA Jinge;ZHANG Gaopeng(School of Mechanical and Electrical Engineering,Xi'an University of Technology,Xi'an 710021,China;Xi'an Future Intelligent Manufacturing Digital Technology Co.,LTD.,Xi'an 710000,China;Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China)

机构地区：[1]西安工业大学机电工程学院,西安710021 [2]西安未来智造数字科技有限公司,西安710000 [3]中国科学院西安光学精密机械研究所,西安710119

出　　处：《光子学报》2024年第11期235-245,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(No.51975448);陕西省“科学家+工程师”队伍建设项目(No.2023KXJ-280);中国科学院青年创新促进会会员项目(No.2022410)。

摘　　要：发展了一种基于聚类分割的光刀中心提取方法。首先将采集的光斑图像利用大津法自适应地分割为背景和目标图像两部分,然后,采用聚类方法分离光斑图像中的激光散斑和光源像,最后,采用Steger算法高质量、亚像素级地提取了光刀中心。仿真及实验结果表明,该方法很好地抑制了散斑及光源像对光刀中心提取的影响,与典型的光刀中心提取方法相比,该方法提取精度和效率均最优,能够高质量、高效率地提取光刀中心,为孔类零件三维轮廓测量提供了一种有效途径。Hole parts,such as bearings,cylinders,hydraulic cylinders,and artillery body tubes,are important to the field of aviation,spaceflight,auto,machine tool and heavy equipment manufacture industry.However,the inspection of inner surface quality of this kind of parts,especially deep hole inner surface,remains a difficult problem in the manufacturing field.More specifically,the difficulty of inspection system mainly lies in two aspects:firstly,the workspace is narrow,making it difficult to effectively use the existing inspection technologies;secondly,due to the limitations of the non-open space of the inner surface,it is easy to form blind zone during the task of measurement.To satisfied with the increasing requirements of quality inspection in above fields,some scholars have applied the optical method into the measurement system of hole parts because of its advantage of high accuracy,high robustness,rapid speed,non-contact,and low cost.However,when measuring inner surface of hole parts,the optical method often presents the problem of a limited or occluded field of view for the characteristics of hole parts.Due to the problem of occlusion,the well-known fringe projection profilometry cannot projected the fringe pattern to the inner surface and the desired deformed fringe pattern cannot be captured by a camera accordingly.So,circular structured light 3D measurement technology has been extensively employed to inspect accuracy of the hole parts,which is an active vision measurement technology based on the laser triangulation principle.Many works have been done to enhance the performance of circular structured light technique.However,occlusions are problematic because the light source and camera are placed on the same side of the measured object in the exiting technique.Additionally,the technique may be disturbed by speckle noise when metal surface is measured.Consequently,for structured light measurement technology,it is necessary to develop an efficient preprocess method to eliminate the disturbance to the most extent be

关 键 词：深孔测量 圆线结构光 散斑 聚类分割 提取光刀中心 

分 类 号：O439[机械工程—光学工程]