摘要
对数字图像分析法测量薄板成形中的应变场问题进行了研究 ,对其中的核心问题“网格识别”进行了讨论。提出识别点集的三个特征值 ,即网格线的连续性 ,网格线的封闭性和网格的长度 ,并在点集识别的基础上计算出测量点坐标。提出由中心点间距和中心连线角度构建的距离判距 ,解决了中心点位置关系的识别问题 ,进而计算出标距长度。
The metgod based on digital-image-analysis to measure the strain-field of deforming sheet is explored and the key of the method'grid recognition' is discussed. Three characteristic parameters are given to recognize the points which constitute a grid.These characteristic parameters are the continuum,the closure and the lenth of the grid.Then the position of the experiment points are calculated by averaging the grid points.The length of the gauge can be calculated after the relationship of the centers is recognized by giving a distance criterion with angle and length of two experiment points.
出处
《河北理工学院学报》
2003年第2期31-36,共6页
Journal of Hebei Institute of Technology
