作者：冯宇, 南卓江, 李楠, 王志华, 赵辉, 陶卫

作者单位：上海交通大学电子信息与电气工程学院, 上海 200240

关键词：行星滚柱丝杠;线结构激光;表面参数测量;中心线提取

摘要：

为实现行星滚柱丝杠的滚柱表面参数测量，建立基于线结构激光的测量系统，针对滚柱螺纹牙型角、螺距和牙型高等表面参数的测量方法进行研究。首先，根据线激光三角法的测量原理，设计搭建测量装置系统。激光经成像系统，通过CCD摄像头获取到线激光条纹图像，对其进行预处理并提取出激光条纹中心。其次，根据螺纹形状特点对获取的螺纹轮廓进行ROI提取，将轮廓线分段进行处理，简化处理难度并获取不同的表面信息参数。最后，根据提取出的分段利用曲线拟合、特征点提取等方法计算所有滚柱表面参数。经实验验证：该文提出的测量系统对牙型角的测量重复性达到0.6°，螺距测量的重复性达到15 μm，牙型高测量的重复性达到8 μm，基本达到滚柱表面参数测量的要求。

Measuring system for parameters of roller surface based on linear structured laser
FENG Yu, NAN Zhuojiang, LI Nan, WANG Zhihua, ZHAO Hui, TAO Wei
School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract: In order to realize the measurement for surface parameters of the roller on a planetary roller screw, a measuring system based on linear laser is established and the methods for measuring the parameters such as thread angle, thread height and thread distance are studied. At first, according to the principle of linear laser triangulation, the measuring equipment was designed and set up. The linear laser which is projected on the measured object could be caught by CCD. Therefore, the image of laser stripe could be produced. After preprocessing, the center of laser stripe could be extracted. According to the shaped characteristics of different parameters, different ROIs on the profile were selected so that the profile could be treated into several sections. This would reduce the difficulty of treatment and make it easier to get more types of information. Finally, by doing curve fitting and extraction of the characteristic points on these sections, all the parameters were able to be calculated. According to the result, the repeatability of thread angle has reached 0.6°, that of pitch has achieved 15 μm and of thread height has achieved 8 μm. The results have basically satisfied the requirement for parameter measurement of roller.
Keywords: planetary roller screw;linear structured laser;surface parameter measurement;extraction of laser stripe center
2020, 46(5):77-81,119  收稿日期: 2019-11-23;收到修改稿日期: 2020-01-07
基金项目: 国家自然科学基金（U1637108）
作者简介: 冯宇(1994-),男,山东泰安市人,硕士研究生,专业方向为电子与通信工程
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