大幅面DLP型3D打印机错位均摊接缝消除方法研究  

Seam Elimination Method by Staggered Splicing for Large-scale DLP-type 3D Printer

作　　者：张蓉 王宜怀[1] 彭涛 徐昕 王绍丹[1] ZHANG Rong;WANG Yi-Huai;PENG Tao;XU Xin;WANG Shao-Dan(School of Computer Science&Technology,Soochow University,Suzhou 215000)

机构地区：[1]苏州大学计算机科学与技术学院,苏州215000

出　　处：《自动化学报》2022年第7期1794-1804,共11页Acta Automatica Sinica

基　　金：国家自然科学基金(61672369);江苏省自然科学基金(17KJB520035)资助。

摘　　要：针对面曝光模式的数字光处理(Digital light processing,DLP)型3D打印机成型幅面较小问题,提出一种移动拼接与错位均摊消除接缝痕迹相结合的大幅面技术方案.该方案首先对三维模型进行均匀切片形成N层切面,再对切面位图进行错位切分,使得相邻层的拼接位置错开,每张切面位图形成M张单元位图,构成3D打印的数据源;其次根据错位参数沿着X轴移动投影仪到达对应曝光位,每层成型M张单元位图,拼接构成一层切面薄片,切面薄片的拼接位置逐层错开,叠加生成三维模型实体.实际打印结果表明,该方案能够以较小的附加成本扩大成型尺寸,提高模型整体质量.In order to solve the problem that the forming area of digital light processing(DLP)type 3D printer with surface exposure mode is limited and small,a technical scheme combining mobile splicing and dislocation equalization to eliminate seam marks is proposed.Firstly,the three-dimensional model is sliced evenly to form Nlayer slices,then the slices are divided by a staggered method,which makes the splicing positions of adjacent layers staggered.Each slice is divided into M sliced bitmaps,which constitute the data source of 3D printing.Secondly,according to the parameters,the projector is moved along the X-axis to reach the corresponding exposure position.Each layer solidifies M bitmaps and splices them together to form a layer of slices.The splicing positions of slices are staggered layer by layer,and three-dimensional model entities are generated by superposition.The actual printing results show that the scheme can enlarge the forming size and improve the quality of the model with a small additional cost.

关 键 词：数字光处理技术 3D 打印 大幅面 错位均摊 接缝消除 

分 类 号：TP334.8[自动化与计算机技术—计算机系统结构]