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A Seam Tracking Method Based on an Image Segmentation Deep Convolutional Neural Network

Authors :
Jun Lu
Aodong Yang
Xiaoyu Chen
Xingwang Xu
Ri Lv
Zhuang Zhao
Source :
Metals; Volume 12; Issue 8; Pages: 1365
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

Vision-based welding seam tracking is an important and unique branch of welding automation. Active vision seam tracking systems achieve accurate feature extraction by using an auxiliary light source, but this will introduce extra costs and the real-time performance will be affected. In contrast, passive vision systems achieve better real-time performance and their structure is relatively simple. This paper proposes a passive vision welding seam tracking system in Plasma Arc Welding (PAW) based on semantic segmentation. The BiseNetV2 network is adopted in this paper and online hard example mining (OHEM) is used to improve the segmentation effect. This network structure is a lightweight structure allowing effective image feature extraction. According to the segmentation results, the offset between the welding seam and the welding torch can be calculated. The results of the experiments show that the proposed method can achieve 57 FPS and the average error of the offset calculation is within 0.07 mm, meaning it can be used for real-time seam tracking.

Details

ISSN :
20754701
Volume :
12
Database :
OpenAIRE
Journal :
Metals
Accession number :
edsair.doi.dedup.....70d9b2f1195db8e82c970683acd98279
Full Text :
https://doi.org/10.3390/met12081365