关键词: 顺序尺寸标注, 尺寸完备性状态, 依赖性分析, 轨迹相交, 几何基元约束状态

Abstract: To achieve the automatic completeness inspection of sequential dimensions,a testing method based on locus intersection was proposed.According to the theory of Geometric Constraint (GC) solving and constraint dependency analysis,the completeness testing of sequential dimensioning was transformed into the constrained states determination of Geometric Primitives (GPs).The mapping relationships between the constrained state of GPs,the using state of dimensions and the completeness states of dimensions were established.The concept of locus was proposed to reflect the influence of GC on GPs,and the locus generation rules were built to analyze the locus intersection principles.Based on the location references,the constrained state of each GP was determined in sequence,and the completeness states of dimensions were confirmed.A 3D model with dimensions was taken as an example to demonstrate the process of completeness testing,and the results verified the effectiveness of the algorithm.

Key words: sequential dimensions, completeness state of dimension, dependency analysis, locus intersection, constrained state of geometric primitives