基于点云的轮胎纵沟参数自动测量

Automatic Measurement of Longitudinal Groove Parameters of Tire Based on Point Cloud

为了能够在逆向工程中快速而准确地测量出轮胎点云模型的纵沟角度,采用数据分块和主成分统计的方式获得轮胎胎面轮廓,然后利用胎面轮廓数据变化规律区分纵沟数据与胎面数据,再用最小二乘直线的方法分别获取胎面和纵沟沟壁的几何参数,以此求出沟壁角度等参数,最后用CATIA二次开发的方法重构纵沟模型。实例结果表明,该方法能够直观有效地测出直线型纵沟的角度并能够满足一定精度。

In this study,the method to measure the longitudinal groove angle of the tire point cloud model quickly and accurately in the process of reverse engineering was developed. Firstly,the tire tread profile was obtained by the method of data block and principal component statistics. Then,the longitudinal groove data and the tread data were distinguished by the variation rule of tread profile data. The parameters such as groove wall angle were calculated by using the geometrical parameters of tread and longitudinal groove which were obtained by the method of the least squares straight line fitting. Finally,the longitudinal groove model was reconstructed on the basis of CATIA secondary development. The example results showed that the method could measure the angle of the linear longitudinal groove directly and accurately with good precision.