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针对汽车覆盖件复杂曲面重构效率低和精度光顺度低等问题,提出基于逆向工程的多种曲面重构技术相结合的方法。通过多种测量技术采集多组点云数据,采用除噪、平滑等技术进行点云预处理,将多组点云数据统一到同一坐标系下,并通过研究Bezier理论和NURBS理论的优缺点,采用多种重构技术相结合的方法达到快速曲面重构的目的。采用该方法进行了汽车覆盖件车门内板的重构,结果表明该方法能够方便快捷地达到复杂曲面重构的精度和光顺度要求,具有较好的实用性。
Aiming at the problems of low efficiency and low precision of reconstructed complex curved surface of automobile panel, a method of combining multiple surface reconstruction techniques based on reverse engineering is proposed. By using multiple measurement techniques to collect multiple sets of point cloud data, point cloud preprocessing is performed using noise reduction and smoothing techniques, and multiple sets of point cloud data are unified into the same coordinate system. By studying the advantages and disadvantages of Bezier theory and NURBS theory, A variety of reconstruction techniques are used to achieve the purpose of rapid surface reconstruction. The method was used to reconstruct the inner panel of automobile panel door. The results show that the method can achieve the precision and smoothness requirements of complex surface reconstruction easily and quickly, and has good practicability.