构建原型表面的数据获取处理与重构研究(英文)

Research of data acquisition process and reconstruction for constructing prototype surface

逆向工程是一种与传统设计相反的现代设计方法。它的重要作用就是加速概念设计和物理设计。逆向工程的关键问题是如何获得点云数据、处理数据和重建数据原型,因此着重研究处理数据点云和重建曲面模型,并经过基于逆向工程系统的机械结构设计最终建成空间曲面模型。使用包含三坐标测量机(CMM)和光学仪的三维光学扫描设备,完成实物对象分散点云数据的获取。获取点云数据后再进行数据处理操作,包括噪声消除、数据插值、数据平滑、数据筛选、数据拼接和曲面重建。处理测量数据创建出CAD模型,将模型在激光快速成型机(SLA)上制造出来。

AS a modern design method that contrary to traditional design, Reverse engineering （RE） plays an important role in accelerating conceptual design and physical design. The key problem of RE is how to obtain point data, process data and reconstruction data for a prototype. Therefore, this study focuses on the key steps of processing point cloud and reconstruction mode. Based on RE system of mechanical structural design, the dimensional surface module is established. The scattered point cloud data are acquired by optical scanning the physical object using three-dimensional coordinate measuring machine （CMM） and an optical scanning device. After the establishment of selected model, data process for prototype, includes noise elimination, data interpolation, data smoothing, data filtering, data splicing and surface reconstructing, are conducted subsequently. Through processing of measurement data, a CAD model is created and fabricated in stereo lithography apparatus （SLA） machine.