基于集成产品信息模型的设计资源检索算法

A Design Resource Retrieval Algorithm Based on Integrated Product Information Model

为了提高设计资源的检索精度和效率,提出了一个基于集成产品信息模型的两阶段检索系统.该系统集非几何与几何信息于一体,将检索分为两阶段:基于非几何信息检索,快速定位检索范围;基于几何信息的检索,采用形状统计检索法,抽取零件的矩属性,计算矩的欧氏距离来评估产品之间的相似性.实例验证了该算法具有较好的检索精度.

A two-phase retrieval system based on integrated product information was put forward to improve the retrieval precision and efficiency of design resource. It integrates both non-geometry and geometry information, and divides the retrieval process into two phases. The first phase reduces the retrieval scope greatly using non-geometry information. The second phase uses the shape statistics method based on geometry information. The moment properties are extracted and then L-norm distances between moments are computed to assess the similarity of products. Case proved that this algorithm has better retrieval precision.