Online measurement of bead geometry in GMAW-based additive manufacturing using passive vision
Online measurement of bead geometry in GMAW-based additive manufacturing using passive vision
复制标题
使用被动视觉在线测量基于 GMAW 的增材制造中的焊珠几何形状
DOI：
10.1088/0957-0233/24/11/115103
复制
发表时间：
2013-11-01
影响因子：
2.4
通讯作者：
Zhang, Guangjun
中科院分区：
文献类型：
--
作者：
Xiong, Jun;Zhang, Guangjun
基于气体保护金属极电弧焊的增材制造是一种以低成本沉积完全致密部件的先进技术。尽管如此，实现该过程的精确控制和自动化的技术尚未得到完善的开发。熔敷焊道几何形状的在线测量是实现可靠控制的关键问题。在这项工作中，被动视觉传感系统，包括两个摄像头和复合滤波技术，提出了通过沉积薄壁的珠的高度和宽度的实时检测。监测喷嘴到顶表面的距离以消除多层沉积工艺期间的累积高度误差。各种图像处理算法的应用和讨论的特征参数的提取。提出了监测系统的标定方法。验证实验证实了分层增材制造中珠几何形状的在线测量系统的有效性。
Additive manufacturing based on gas metal arc welding is an advanced technique for depositing fully dense components with low cost. Despite this fact, techniques to achieve accurate control and automation of the process have not yet been perfectly developed. The online measurement of the deposited bead geometry is a key problem for reliable control. In this work a passive vision-sensing system, comprising two cameras and composite filtering techniques, was proposed for real-time detection of the bead height and width through deposition of thin walls. The nozzle to the top surface distance was monitored for eliminating accumulated height errors during the multi-layer deposition process. Various image processing algorithms were applied and discussed for extracting feature parameters. A calibration procedure was presented for the monitoring system. Validation experiments confirmed the effectiveness of the online measurement system for bead geometry in layered additive manufacturing.