测量造型技术中的散乱数据规则化处理方法

针对测量造型技术中的散乱数据处理问题，提出了一个实用的散乱数据规则化方法。该方法基于散乱数据的三角剖分，建立五次Ｃ１ 三角插值曲面，用平行平面截取三角曲面得到截面线数据，对截面线数据进行去重点、光顺、匀化等处理，得到规则的四边形网格数据。该方法已经应用于实际工程中，具有简单、有效、通用性强、稳定性好等特点。

A New Method for Transferring Scattered Data into Regular Data in Reverse Engineering

One of the difficult problems in reverse engineering is the processing of scattered data. We present a new method for transferring scattered data into regular data in reverse engineering. Such a method, as to our best knowledge, has not been reported in the open literatures. Fig.1 shows schematically our method for transferring scattered data into regular data. It involves the following five steps: (1) Scattered data is triangulated by a planar triangulation algorithm 5] (subsection 1.2.1). (2) The triangles are optimized in 3D space to get a better form (subsection 1.2.2). (3) For each triangle, construct a five degree triangular interpolation surface with C 1 continuity (subsection 1.2.3). (4) Cut the triangle surfaces with a series of parallel planes to get the intersection data (subsection 1.2.4). (5) Smooth the intersection data and we get the required regular data. The smoothing method we used is described in 3]. Our method has been applied to reverse engineering in a Chinese aircraft manufacturing company, and has met with preliminary success.