[1]Zheng B, Wang H J, Wang Q L. Front image sensing of the keyhole puddle in the variable polarity PAW of aluminum alloys [J]. Journal of Materials Processing Technology, 1998, 83: 286298.
[2]Wang H, Kovacevic R. Online monitoring of the keyhole welding pool invariable polarity plasma arc welding [J]. Journal of Engineering Manufacture, 2002,216: 1265.
[3]Zhang Y M, Zhang S B. Observation of the keyhole during plasma arc welding [J]. Welding Journal, 1999, 78: 53s58s.
[4]Wu C S, Wang L, Ren W J, et al. Plasma arc welding: Process, sensing, control and modeling[J]. Journal of Manufacturing Processes, 2014, 16: 7485.
[5]Liu Zuming, Wu Chuansong, Gao Jinqiang. Visionbased observation of keyhole geometry in plasma arc welding [J]. International Journal of Thermal Sciences,2013, 63: 3845.
[6]Liu Zhonghua, Wang Qilong. Process control based on doubleside image sencing of the keyhole in VPPA welding [J]. Journal of Materials Processing Technology, 2001, 115: 373379.
[7]Bernstein E J, Amit Y. Partbased statistical models for object classification and detection[C]∥In Proceedings of the 2004 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR). Piscataway: IEEE, 2005: 432438. |