Journal of Applied Science and Engineering

Published by Tamkang University Press

1.30

Impact Factor

2.10

CiteScore

Linbo Hao1This email address is being protected from spambots. You need JavaScript enabled to view it., Huaming Wang2, Zeyu Sun1, Yiming Wang1, Bin Li1, Shaohua Jiang2, and Zhiqiang Liu2

1Luoyang Institute of Science and Technology, Luoyang, 471023, China

2Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China


 

Received: October 16, 2024
Accepted: March 19, 2025
Publication Date: May 1, 2025

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.6180/jase.202601_29(1).0007  


Planar butt seams are common in industrial sites, while the current seam extraction schemes are difficult to cope with butt seams with varying widths. Based on DLP (Digital Light Processing) vision technology, this paper proposes an automatic seam extraction method to solve this challenge. Firstly, we calculate different-granularity contour points based on the Alpha Shape algorithm, then extract seam feature points by calculating specific distance information. Secondly, we construct a type of 2D reference coordinate frame by analyzing the structural characteristics of the workpiece, then conduct a dimensionality reduction transformation on the feature points. Finally, we design an algorithm for curve fitting and discrete interpolation, which can generate the ordered interpolation points for welding. The experimental results demonstrate that the proposed seam extraction method can accurately, robustly, and efficiently extract the butt seams with varying widths.


Keywords: Butt seam; Seam extraction; DLP vision; Point cloud computing.


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