基于局部曲面重建的逆向工程系统模型的研究

Research on Reverse Engineering System Model Based on Partial Surface Reconstructing

在分析逆向工程系统模型的基础上 ,提出一种基于局部曲面重建的逆向工程系统模型 ,可以根据现有产品的测量数据直接显示三维图象和快速成型 ,大大缩短逆向工程所需的时间 ,免除了大量复杂曲面建模的困难。同时分析了基于光线追踪的体绘制算法的原理和影响显示效率的因素 ,设计了光线追踪显示体数据的新求交算法。实验结果表明 ,该算法具有较强的实用价值 。

This paper explains general system model of reverse engineering, and a new reverse engineering system model of mechanical product 3D modeling based on partial surface reconstructing is presented.In this system,the 3D model can be reconstructed directly based on volume data.This method makes the realization of reverse engineering more simple and efficient.Moreover, this paper analyses the basic principle and the key technology of the direct volume rendering based on ray tracing method,and also, a new intersecting algorithm in ray tracing method to realize volume rendering is given. The result shows that this algorithm is superior in efficiency and it is import to push ahead with the research on reverse engineering.