Laser visual measurement for gap values and misalignment values of pipeline welding groove

doi:10.12073/j.hjxb.2018390282

	Laser visual measurement for gap values and misalignment values of pipeline welding groove
	Zhang, Pengxian 1,2; Wei, Zhicheng 1,2; Liu, Zhihui 1,2
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2018-11-25
卷号	39 期号:11 页码:103-107
关键词	Pipelines Pixels Welding Welds Automatic Detection Correlative relationship Detection algorithm Gap values Laser stripes Laser vision Quality assessment Visual measurements
ISSN号	0253360X
DOI	10.12073/j.hjxb.2018390282
英文摘要	A laser visual measurement method for values of the gap and misalignment is proposed, when the welding grooves are assembled between pipelines. Firstly, a computer system is designed to realize the automatic detection for the profile of welding grooves. Through the analysis of the collected laser vision images, it is found that the correlative relationship between the values of gap and misalignment and the break point and inflection point of laser stripes. Secondly, the extracted stripe images are processed by skeletal morphology to obtain refined stripes with a single pixel width. The same time, using the sub-pixel contour coordinate detection algorithm, the pixel coordinates of the discrete points on the stripes are obtained. Finally, based on the above-mentioned correlative relationship, the algorithms for the gap values and the misalignment values are established. The actual verification shows that it is feasible to measure values of the gap and misalignment based on the pixel coordinates of feature points in laser stripe, the measurement results can meet the needs of quality assessment in the process of the weld groove assembly. © 2018, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114113]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Nonferrous Metal alloys and Processing, Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhang, Pengxian,Wei, Zhicheng,Liu, Zhihui. Laser visual measurement for gap values and misalignment values of pipeline welding groove[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2018,39(11):103-107.
APA	Zhang, Pengxian,Wei, Zhicheng,&Liu, Zhihui.(2018).Laser visual measurement for gap values and misalignment values of pipeline welding groove.Hanjie Xuebao/Transactions of the China Welding Institution,39(11),103-107.
MLA	Zhang, Pengxian,et al."Laser visual measurement for gap values and misalignment values of pipeline welding groove".Hanjie Xuebao/Transactions of the China Welding Institution 39.11(2018):103-107.