Measurement of the Dynamic and Liquid Weld Pool Under Glaring Arc Light with Femtometre Accuracy

CORC > 沈阳自动化研究所 > 中国科学院沈阳自动化研究所 > 机器人学研究室

	Measurement of the Dynamic and Liquid Weld Pool Under Glaring Arc Light with Femtometre Accuracy
	Yang YM(杨永明); Wang ZZ(王振洲)
	2017
会议日期	JUN 23-26, 2017
会议地点	Shanghai, PEOPLES R CHINA
关键词	Measurement Structured light Conformal mapping Single shot Weld pool
页码	111-119
英文摘要	Accurate measurement of the 3D shape of the dynamic weld pool is of great importance for on-line welding process control and off-line welding phenomenon study. However, it remains challenging due to the following reasons. Firstly, the weld pool is dynamic and liquid with extremely high temperature, which requires a nondestructive single-shot measurement technique. Secondly, the specular surface and the ambient strong arc light prevent direct imaging by cameras. Here, we present a structured light technique that yields closed form solutions with femtometre accuracy to measure the dynamic shape of the weld pool produced by gas tungsten arc welding (GTAW). This technique makes use of the band-pass filter and the high penetrability of lasers to overcome the glaring arc light. The sampling points on the weld pool surface are measured by computing the intersections of the projected laser rays and the corresponding reflected laser rays analytically. A conformal mapping transforms the physical world into the virtual world to make the measurement free of optics aberrations. As a result, the achieved measurement accuracy is up to 10(-13) mm, which is significantly superior to state of art methods.
产权排序	1
会议录	TRANSACTIONS ON INTELLIGENT WELDING MANUFACTURING, VOL I, NO. 1 2017
会议录出版者	SPRINGER-VERLAG SINGAPORE PTE LTD
会议录出版地	SINGAPORE
语种	英语
ISSN号	2520-8519
ISBN号	978-981-10-5355-9; 978-981-10-5354-2
WOS记录号	WOS:000451078400010
内容类型	会议论文
源URL	[http://ir.sia.cn/handle/173321/23657]
专题	沈阳自动化研究所_机器人学研究室
通讯作者	Wang ZZ(王振洲)
作者单位	Shenyang Institute of Automation, Chinese Academy of Science
推荐引用方式 GB/T 7714	Yang YM,Wang ZZ. Measurement of the Dynamic and Liquid Weld Pool Under Glaring Arc Light with Femtometre Accuracy[C]. 见:. Shanghai, PEOPLES R CHINA. JUN 23-26, 2017.