Beijing Engineering Research Center for Advanced Joining Technology in Energy Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
To address the issues of insufficient degrees of freedom, low intelligence, and poor adaptability to complex welding conditions in existing all-position automatic pipeline welding equipment, a mobile collaborative robotic arm pipeline all-position welding robot system based on laser vision sensing was proposed.The system integrated a mobile chassis, a six-axis collaborative robotic arm, a laser vision sensor, and a flexible guide rail, forming a seven-degree-of-freedom welding system with multi-posture welding torch adjustment capability.A multi-task heterogeneous control system architecture based on a soft PLC real-time kernel was constructed to achieve centralized control of EtherCAT/CANopen multi-bus networks.Seam searching and real-time tracking were performed using the laser vision sensor, and an improved RANSAC(random sample consensus) algorithm combined with an adaptive threshold strategy was employed to achieve robust seam trajectory fitting and dynamic compensation.Experimental results of narrow-groove pipeline all-position welding show that the system design is reasonable, the robot operates stably, the seam tracking accuracy meets requirements, and the weld formation is satisfactory, fulfilling the demands of all-position welding conditions.
LUO Yu, JIA Yu-lin, TIAN Wen-peng, HUANG Zi-xiang, WANG Dong-dong, ZUO Meng-kui.
Mobile Collaborative Robotic Arm Pipeline All-position Welding Robot Based on Laser Vision Sensing[J].
Science Technology and Engineering, 2026, 26(19): 8019-8028 DOI:10.12404/j.issn.1671-1815.2507306
XuFeng. Analysis of all-position automatic welding technology for long-distance pipelines[J]. China Petroleum and Chemical Standard and Quality, 2024, 44(17): 190-192.
YinTie, ZhaoHong, ZhangQian. Technical status and development trends of welding robots for long-distance oil and gas pipelines[J]. Petroleum Science Bulletin, 2021, 6(1): 145-157.
CaoYongli, HuangFuxiang, WangQin. Progress and development direction of welding technology for long-distance pipelines in China[J]. Petroleum Science and Technology Forum, 2012, 31(1): 7-11, 68.
[7]
2022中国工业机器人市场研究报告[J]. 机器人产业, 2022, 11(4): 83-95.
[8]
2022 China industrial robot market research report[J]. Robot Industry, 2022, 11(4): 83-95.
[9]
WeissA, WortmeierA K, KubicekB. Cobots in industry 4. 0: a roadmap for future practice studieson human-robot collaboration[J]. IEEE Transactions on Human-Machine Systems, 2021, 51(4): 335-345.
WangShuai, ShiJingyu, DongChuanyang, et al. Design of intelligent welding system based on collaborative robot[J]. Electric Welding Machine, 2025, 55(4): 34-39, 48.
FengChuanzhi, LuoYu, XuYaobo, et al. Structural design and kinematic analysis of all-position welding robot for pipelines[J]. Journal of Mechanical & Electrical Engineering, 2024, 41(8): 1489-1499.
[18]
GuoQ, YangZ, XuJ, et al. Progress, challenges and trends on vision sensing technologies in automatic/intelligent robotic welding: State-of-the-art review[J]. Robotics and Computer-Integrated Manufacturing, 2024, 89: 102767.
MaoYilin, LiYue, WeiMingchen. Forward and inverse kinematic analysis and workspace construction of a 6-DOF garbage sorting robot[J]. Modern Machinery, 2023, 24(6): 55-59.
[23]
MinK, NiF, ChenZ, et al. A unified calibration method for robot manipulators: hand-eye parameters, kinematic parameters and TCP position calibration[J]. Robotic Intelligence and Automation, 2024, 44(6): 897-909.
ZhangGong, TuoShuaihua, CaoXuepeng, et al. Current status and development trend of weld seam tracking technology for welding robots[J]. Science Technology and Engineering, 2021, 21(10): 3868-3876.
[26]
赵磊. 基于激光三维视觉传感的焊接机器人焊缝定位与跟踪研究[D]. 深圳: 深圳大学, 2023.
[27]
ZhaoLei. Research on weld seam positioning and tracking of welding robot based on laser 3D vision sensing[D]. Shenzhen: Shenzhen University, 2023.
LiHanlin, JiangYueming, AnTengfei, et al. Positioning system of sewage pipeline robot based on multi-sensor fusion[J]. Science Technology and Engineering, 2025, 25(26): 11252-11259.
BaiShuo, LiZhelin, YuanXin, et al. Detection of geometric features of multi-layer multi-pass welds based on line laser sensing[J/OL]. (2025-09-22)[2025-10-19]. https://link.cnki.net/urlid/23.1174.TG.20250919.1710.002.