逆向工程的关键技术及其应用研究

全面论述了逆向工程的应用领域；讨论了坐标点的测量技术，说明了各种测量方法的特点和适用范围；阐述了逆向工程中曲面重建技术及存在的主要问题，提出了一种用Ｂ样条曲面重构复杂雕塑曲面的算法。该算法首先利用部分测量数据构造张量积的Ｂ样条网格曲面，通过确定适当的检查点，并计算检查点到所构造的Ｂ样条网格曲面间的距离，从而控制重构曲面的构造精度；文章最后给出了与通用ＣＡＤ／ＣＡＭ集成一体的曲面自动重建模块的主要功能。

Key Problems and Its Applications of Reverse Engineering

Reverse engineering is to rebuild the digital modal of the sample object by means of surface data acquisition and processing. This paper introduces in detail the application fields of reverse engineering, the techniques of coordinate data acquisition and complex free form surface reconstruction. It addresses a new surface reconstruction algorithm. In the proposed algorithm, part of the inspection points is first used to construct a tensor product B spline mesh surface, which roughly fits the sample object. An accuracy control algorithm is then introduced to improve the generated B spline surface till it is within the given tolerance. The main functions of surface reconstruction module, which is seamlessly integrated with the current surface modeling system, are given at last.