摘要
自由曲面的反求由自由曲面的测量、特征提取以及曲面构造组成。自由曲面的测量可通过各种接触或非接触的方法实现 ;特征提取是对云状数据进行分片并提取各片的特征线的过程 ;曲面构造就是通过对各曲面片内的数据点进行拟合来定义出自由曲面的几何形状。通过对汽车发动机进气道自由曲面的反求实现了以上过程 。
Reverse engineering is accomplished in three steps, part digitization, features extraction, and CAD modeling. Part digitization is accomplished by variety of contact and non-contact digitizers.Features extraction is normally achieved by segmenting the digitized data and capturing surface features such as edges. Part modeling is carried out by fitting variety of surfaces to the segmented data points.This process is used to model the free form surface of engine inlet surface.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2001年第7期741-743,共3页
China Mechanical Engineering
基金
中国博士后基金项目
上海市科技攻关项目
