[1] Xiang J, Yang F. The development of seam tracking technology based on sensors[J]. China Plant Engineering, 220-221(2021).

[2] Zhu Y, Ling Z G, Zhang Y Q. Research progress and prospect of machine vision technology[J]. Journal of Graphics, 41, 871-890(2020).

[3] Chen X Y, Zhang Q X, Zhu L L et al. The method of real time seam tracking for robotic welding system based on laser vision sensor[J]. Laser & Infrared, 51, 421-427(2021).

[4] Liu T Y, Bao J S, Wang J L et al. Laser Welding Penetration State Recognition Method Fused with Timing Information[J]. Chinese Journal of Lasers, 48, 0602119(2021).

[5] Xu D, Zhao X G, Tu Z G et al. Automated measurement of weld seam based on structured light stereovision[J]. Transactions of the China Welding Institution, 25, 45-48, 52(2004).

[6] Liu X W, Hong B, Dai T F. Laser vision seam tracking image processing and groove recognition[J]. Laser and infrared, 41, 804-807(2011).

[7] Sun H Y, Liang D T, Li G P et al. Weld seam recognition algorithm based on constraint Kalman filter[J]. Laser & Infrared, 46, 1006-1013(2016).

[8] Feng L, Xie J S, Li G et al. Review of camera calibration principles and methods[J]. Mechanical Engineer, 18-20(2016).

[9] Yu L L, Li Y W, Luan Y B et al. Line structured light calibrating based on two-dimensional planar target[J]. Chinese Journal of Scientific Instrument, 41, 124-131(2020).

[10] Ren J X, Zhang X, Liu S L et al. A high precision hand-eye calibration method for robot[J]. Modern Manufacturing Engineering, 44-51(2020).

[11] Kang C F, Wang H W, Zhang P F et al. Study and realization of tool coordinate frame calibration for welding robots[J]. Journal of Beijing University of Technology, 42, 30-34(2016).

[12] Kim J W, Bae H S. A study on a vision sensor system for tracking the I-Butt weld joints[J]. Journal of Mechanical Science and Technology, 19, 1856-1863(2005).

[13] Du J Z, Zhang Y X, Jingjing Wang J J et al. Weld Path Identification Based on Kernel Correlation/Kalman Filters[J]. Chinese Journal of Lasers, 49, 0202009(2022).

[14] Han D X, Zhong B J. Edge thinning algorithm based on gradient mask filter[J]. Laser & Optoelectronics Progress, 57, 181016(2020).

[15] Wu Q H, Zhou Y, Li Z Q et al. Extracting method for light strip center of linear structural light based on dual frequency curve fitting[J]. Laser & Optoelectronics Progress, 57, 141502(2020).

[16] Liu Y, Wang G, Wang G D et al. For machine vision image acquisition and image processing of weld[J]. Computer Engineering and Applications, 50, 135-140(2014).

[17] Zhang Y T, Jia Y M. Analysis and program implementation of least squares polynomial curve fitting[J]. Computer & Digital Engineering, 45, 637-639, 654(2017).

[18] Wang G H, Qian K M. Review on line-scan camera calibration methods[J]. Acta Optica Sinica, 40, 0111011(2020).

[19] Nie X B, Chen Y F. Kinematics analysis of the welding robot[J]. Process Automation Instrumentation, 34, 67-72(2013).