工业CT切片图像直接生成快速原型层片数据

Direct generation of rapid prototyping slice data from industrial CT images

为了将工业CT与快速原型直接集成,提出了一种由工业CT切片图像直接生成快速原型层片数据的方法。首先对工业CT切片图像进行边缘提取、去噪、细化、连接和轮廓跟踪,获取样件的内外结构轮廓点数据;然后在相邻断层间建立轮廓匹配点对,线性插值层间轮廓数据,以满足快速原型加工对层片厚度的要求,并用三次B样条曲线对所有轮廓进行拟合;最后经过轮廓数据点采样和内外轮廓判断后,生成通用层接口文件输入快速原型系统。试验验证了该方法的有效性与正确性。

To integrate industrial computed tomography（CT） technology with rapid prototyping（RP） directly,a new method creating an RP slice file directly from industrial CT slicing images is presented.Firstly,through edge extraction and contour de-noising,connecting,thinning and tracing,the basic contour point data of the interior and exterior structure of a sample piece are obtained.Subsequently,matching point pairs between adjacent layers are established,interlayer contours are got by linear interpolation,and then all contours are fitted by cubic B-spline curves.Finally,a CLI file is created after contour point sampling and interior and exterior contour recognizing.The CLI file is then input into an RP system and a product is manufactured.Applications of the method prove that it is effective and feasible.