PSD based signal recognition system for thin plate welding groove
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摘要: 坡口信号识别是自动化焊接工艺的难点。基于此,运用PSD传感器的光敏性设计了光路图,建立了相对应的光路模型;针对PSD传感器会出现一定程度的非线性畸变,建立了相对应的改进模型,根据PSD传感器的输出位移与时间曲线的特点,提出了提取坡口角点信息的相关算法,实现对角点的实时提取及坡口的形貌拟合。结果表明,该信号识别系统能准确检测坡口的位置变化,并对坡口存在的缺陷进行实时检测,避免后期焊接过程出现失误,影响焊接质量。Abstract: Groove signal recognition is a difficult point in automatic welding process. Based on this, the light path diagram was designed with the photosensitivity of PSD sensor and the corresponding light path model was established. Aiming at the nonlinear distortion of the PSD sensor to a certain extent, a corresponding improved model was established. According to the characteristics of the output displacement and time curve of the PSD sensor, a relevant algorithm was proposed to extract the corner information of the groove, so as to realize the real-time extraction of the diagonal points and the shape fitting of the groove. The results showed that the signal recognition system could accurately detect the change of groove position and defects of groove in real time, so as to avoid errors in the later welding process and affect the welding quality.
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[1] 余卓骅, 胡艳梅, 何银水. 薄板机器人自动焊接焊枪三维偏差的有效提取[J]. 焊接学报, 2019, 40(11): 49-53. [2] 孙博文, 朱志明, 郭吉昌, 等. 基于激光结构光的视觉传感器的图像处理技术研究应用及展望[J]. 焊接, 2018(9): 10-14. [3] Seiler M, Patschger A, Bliedtner J. Investigations of welding instabilities and weld seam formation during laser microwelding of ultrathin metal sheets [J]. Journal of Laser Applications, 2016, 28(2): 022417.
[4] Yu Z H, He Y S, Xu Y L, et al. Vision-based deviation extraction for three-dimensional control in robotic welding with steel sheet [J]. The International Journal of Advanced Manufacturing Technology, 2018, 95(1-4): 23-49.
[5] Shao W J, Huang Y, Zhang Y. A novel weld seam detection method for space weld seam of narrow butt joint in laser welding [J]. Optics and Laser Technology, 2018, 99: 39-51.
[6] 鲁建波, 徐培全, 姚舜, 等.圆形扫描结构光传感器的标定和焊缝检测[J]. 焊接学报, 2006, 27(4): 53-56. [7] 文晓江, 刘春, 赵琳, 等. 激光-PSD传感器在焊缝跟踪中的应用[J]. 传感器技术, 2001, 20(5): 41-43.
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