CAJ | 학술논문

根据工件的几何特征及其参数进行测量轨迹规划是在机检测系统中重要的环节之一.为了从STL(stereo lithographic)文件中提取出其所描述的工件模型的几何特征及参数,给出了一种针对其数据文件格式特点的自然二次曲面特征参数提取新方法.该方法首先根据三角面片法向量在高斯球面的映射图像判定自然二次曲面几何特征,然后将快速聚类法和Gauss-Newton法相结合,对STL文件中坐标点进行几何特征参数的计算.计算实例表明,该算法能够稳定、准确地提取出自然二次曲面的几何特征参数.
근거공건적궤하특정급기삼수진행측량궤적규화시재궤검측계통중중요적배절지일.위료종STL(stereo lithographic)문건중제취출기소묘술적공건모형적궤하특정급삼수,급출료일충침대기수거문건격식특점적자연이차곡면특정삼수제취신방법.해방법수선근거삼각면편법향량재고사구면적영사도상판정자연이차곡면궤하특정,연후장쾌속취류법화Gauss-Newton법상결합,대STL문건중좌표점진행궤하특정삼수적계산.계산실례표명,해산법능구은정、준학지제취출자연이차곡면적궤하특정삼수.
The trajectory planning of measurement according to the geometric features and their parameters of work pieces is one of the important steps in OMV (on-machine verification) system. In order to extract the geometric features and their parameters of work models described in STL (stereo lithographic) files,a new method for characteristic parameter extraction,which is suitable for the STL format,has been put forward. In this method,the geometric features of natural quadric surface were first identified according to the mapping images of the triangular faces' normal vectors on the Gauss sphere. Then the characteristic parameters of the coordinate points in STL files were calculated with fast clustering algorithm and GaussNewton method. The calculation results indicate that the geometric characteristic parameters of natural quedric surface can be extracted accurately with the algorithm proposed in this paper.