基于嵌入式Linux的桌面级DLP型3D打印机设计  

Design of desktop DLP model 3D printer based on embedded Linux

作　　者：赵炯[1] 于学海[1] 杨天豪[1] 周高杨 凌浩[1] 徐强 

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]上海市光铧科技有限公司,上海201803

出　　处：《机电工程》2017年第5期547-551,共5页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(51375345)

摘　　要：针对现有DLP型3D打印机价格高、体积大、普及率低、打印时需要连接个人电脑等问题,详细研究了DLP型3D打印机打印原理及实现方式,使用廉价解决方案改进了原有硬件结构,利用Python语言重新编写控制软件,提出了一种基于嵌入式Linux的桌面级DLP型3D打印机设计方案。3D打印机采用Cortex-A7内核的树莓派为硬件核心,运用开源的计算机视觉库Open CV实现了图片解析与显示,通过控制步进电机带动丝杆螺母实现了打印平台精确升降,利用串口触摸屏代替电脑上位机实现了用户脱机打印。该DLP型3D打印机体积为240×220×500 mm(长*宽*高),最大成型体积达到120×120×160 mm(长*宽*高),打印层高最小为0.025 mm,图片显示分辨率达到1 080 P。实际打印结果表明,该DLP型3D打印机具有打印精度高,体积小,成本低,可实现脱机打印的优点。Aiming at the problems of high cost, inconvenience and unpopularity of DLP 3D printers, research on the theory and implementation of DLP 3D printers were carried out. A desktop DLP 3D printer based on embedded Linux with low-priced hardware and python language was proposed. This 3D printer system was constituted by a Cortex-A7 micro controller named Raspberry Pi, a software using GPL OpenCV, a stepper motor to control printing platform and a serial touch screen, providing the ability of off-line printing. Models which were smaller than 120 ＊ 120 ＊ 160（mm） can be printed by this 3D printer whose size was 240 ＊ 220 ＊ 500（ram）. A 0. 025 mm height of each layer and a 1 080 P image resolution were confirmed by the test results. The results indicate that this 3D printer has the advantages of high printing precision, small size, low cost and off-line printing.

关 键 词：3D打印 桌面级 DLP 树莓派 OPENCV 脱机打印 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]