基于ICT切片图像数字化分析的反求建模方法  

Reverse design method for industrial product model based on digital image processing of ICT slice pictures

作　　者：范彦斌[1] 李西兵[2] 

机构地区：[1]佛山大学机电工程系,广东佛山528000 [2]齐齐哈尔大学机械工程系,黑龙江齐齐哈尔161006

出　　处：《西北大学学报（自然科学版）》2004年第1期23-26,共4页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(50175015);广东省自然科学基金资助项目(011824)

摘　　要：目的　建立复杂结构产品零件的反求建模方法。方法　借助非接触测量设备获取产品零件的尺寸数据或图像,并通过分析计算和CAD软件等辅助工具,建立产品的几何模型。结果　将新一代三维工业CT作为测量手段,对产品实物的切片图像进行数字化分析、图像边界提取和二维轮廓数据读取,并对生成的产品数字模型进行了误差分析。得到反求建模技术和三维产品数学模型。结论　所得技术适合于小型、复杂和不可拆卸产品零件的设计和再设计工作;所得模型为产品进入再设计阶段奠定基础;应依据产品的结构特点和设计精度确定ICT切片采样分辨率。AimTo establish the reverse design method for complex structural industrial product. MethodsBased on the non-contact measuring equipment such as industrial computed tomograph(ICT) and it's slice pictures,the steps involved in the reverse engineering are identified for creating a computed aided design model of complex structural industrial product by using the digital image processing and CAD software . ResultsThe methods of image segmentation, seed-filling and 2D-feature extraction are described in detail. According to different resolution of ICT equipment for obtaining the ICT slice pictures the tolerance analysis between the prototype product and CAD-model is presented to demonstrate that the proposed methods are viable.ConclusionThe obtained reverse design technique based on the non-contact measuring are suited for the design and redesign of the parts of the small, complex industrial products which are not disassembled; the error of the acquired 3D product's mathematical model is within our acceptable range; ascertain sampling resolution of ICT slices according to the structure features of the products and the design precision of the equipment.

关 键 词：CAD ICT 逆向设计 数字图像处理 

分 类 号：V260.5[航空宇航科学与技术—航空宇航制造工程]