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LIU Lijun, ZHANG Weijie, HU Xiongwu, ZHANG Hongxing. CCD calibration technology for low-power laser automatic repair of dies[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(12): 1-4.
Citation: LIU Lijun, ZHANG Weijie, HU Xiongwu, ZHANG Hongxing. CCD calibration technology for low-power laser automatic repair of dies[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(12): 1-4.
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CCD calibration technology for low-power laser automatic repair of dies

  • 1.

    Harbin University of Science and Technology, Harbin 150080, China;Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China

  • 2.

    Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China

  • 3.

    Harbin University of Science and Technology, Harbin 150080, China

  • 4.

    Kim Ningbo Co., Ltd., Ningbo 315174, China

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  • Received Date: March 16, 2014
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    • Abstract
  • Aim at the quality control problems during the process, visual sensing technology was introduced. In order to obtain the visual feature information accurately, the imaging system was analyzed, imaging model was put forward, and the sub-pixel corner extraction algorithm was compared. External parameters and extrinsic parameters was obtained by improved calibration algorithm of Zhang using color optimized calibration target. Results show that calibration error is 0.712 305 pixel, it namely that 0.123 mm. Two dies was repaired after the calibration, which could meet the accuracy requirement and this method was practical and reliable.
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    • References (4)
  • 李会山, 杨洗陈, 王云山, 等. 模具的激光修复[J]. 金属热处理, 2004, 29(2): 39-42. Li Huishan, Yang xichen, Wang Yunshan, et al. Laser repairing for dies[J]. Heat Treatment of Metals, 2004, 29(2): 39-42.
    张海鹏, 韩端锋, 苗玉刚, 等. 基于立体视觉焊接变形测量系统标定[J]. 焊接学报, 2012, 33(3): 21-24. Zhang Haipeng, Han Duanfeng, Miao Yugang, et al. Calibration of welding distortion measuring system based on stereo vision[J]. Transactions of the China Welding Institution, 2012, 33(3): 21-24.
    邓勇军, 陈华斌, 林 涛, 等. 基于OpenCV的移动焊接机器人视觉系统自主标定方法[J]. 焊接学报, 2012, 33(7): 45-48. Deng Yongjun, Chen Huabin, Lin Tao, et al. Auto-calibration method of vision system for mobile welding robot based on OpenCV[J]. Transactions of the China Welding Institution, 2012, 33(7): 45-48.
    Zhang Z Y. Aflexible new technique for camera calibration[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 2000, 22(11): 1330-1334.
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