挤出吹塑中型坯尺寸的在线分析  

Online Analysis of Parison Dimension in the Extrusion Blow Molding of Plastics

作　　者：李炯城[1] 黄汉雄[1] 

机构地区：[1]华南理工大学工业装备与控制工程学院塑料橡胶装备及智能化研究中心,广东广州510640

出　　处：《中国塑料》2005年第3期67-70,共4页China Plastics

基　　金：国家自然科学基金项目(50290090)

摘　　要：对型坯的视频图像进行了在线分析,并提出了一种不同于传统数字图像处理的新方法,用来定位型坯表面每个墨痕(在机头出口附近用画线方法形成)的位置。还使用了“sobel”和“canny”这两种传统的方法,来定位型坯的边界。这样,可在线确定出相邻两个墨痕之间的距离和对应每个墨痕的型坯外径。采用锥形圆筒来对墨痕之间的型坯段进行几何近似,根据质量守恒计算出对应每个墨痕的型坯内径。Online analysis was carried out on the video image of the parison,and a novel method of digital image processing was proposed which was employed to locate the ink marks on the parison scribed just below the die exit.Two conventional methods,'sobel' and 'canny',were adopted to find the borders of the parison.By this way the distance between adjacent two ink marks and the outer diameter corresponding to each ink mark were determined online.A tapered cylinder geometry was assumed to approximate the parison segment between adjacent two ink marks.The inner radius corresponding to each ink mark was calculated on the basis of mass conservation.

关 键 词：挤出吹塑 型坯成型 数字图像分析 

分 类 号：TQ320.664[化学工程—合成树脂塑料工业]