基于相位一致性的激光熔覆熔池边缘提取方法

doi:10.3901/JME.2018.05.166

机械工程学报 ›› 2018, Vol. 54 ›› Issue (5): 166-172.doi: 10.3901/JME.2018.05.166

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基于相位一致性的激光熔覆熔池边缘提取方法

刘坚, 向超前, 王方华, 易怀安

湖南大学汽车车身先进设计制造国家重点实验室长沙 410082

收稿日期:2017-04-18 修回日期:2017-12-19 出版日期:2018-03-05 发布日期:2018-03-05
通讯作者: 刘坚(通信作者),男,1975年出生,博士,教授,博士研究生导师。主要研究方向为质量控制。E-mail:liujian@hnu.edu.cn
作者简介:向超前,男,1991年出生,硕士研究生。主要研究方向为机器视觉在机械制造中的应用。E-mail:xiangchaoqian@126.com;王方华,男,1993年出生,硕士研究生。主要研究方向为激光3D打印高度探测。E-mail:646578720@qq.com;易怀安,男,1973年出生,博士研究生。主要研究方向为机器视觉在机械制造中的应用。E-mail:yihuaian@126.com
基金资助:
国家自然科学基金（71271078）和汽车车身先进设计制造国家重点实验室自主研究课题（71675001）资助项目。

New Method Based on Phase Congruency for Weld Pool Edge Extraction in Laser Cladding

LIU Jian, XIANG Chaoqian, WANG Fanghua, YI Huaian

State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082

Received:2017-04-18 Revised:2017-12-19 Online:2018-03-05 Published:2018-03-05

摘要/Abstract

摘要： 针对激光熔覆过程中存在弧光、熔融金属液滴等干扰导致激光熔覆熔池边缘难以准确提取的问题，提出了基于相位一致模型的熔池边缘提取方法。为了得到完整、精准的熔池边缘，对获取的熔池图像进行预处理后，使用基于阈值的方法，对熔池进行初步分割，对剪裁后的熔池图像采用相位一致性模型进行边缘检测，将其边缘在粗分割区域进行标记，对标记图进行进一步分割并用sobel算子对精分割区域进行边缘提取。相关试验的对比分析表明，该方法具有良好的熔池边缘提取精度和干扰鲁棒性。

关键词: 边缘提取, 激光熔覆熔池, 相位一致性

Abstract: Aiming at the problem of being difficult in weld pool edge extraction in laser cladding due to the interference such as arc, molten metal drop and so on. A method for extracting the edge based on phase congruency is presented. In order to extract complete and accurate weld pool edge, the molten pool is roughly divided by using the method based on threshold after preprocessing the acquired weld pool image. Phase consistency model is adopted to execute the edge detection for the clipped molten pool image and its edge is marked in coarse segmentation region. Then make further segmentation for the marked image and extract the weld pool edge with sobel operator. Comparison and analysis of the related experiments show that this method has good performance in the accuracy and robustness of weld pool edge extraction.

Key words: edge extraction, phase congruency, weld pool of laser cladding

中图分类号:

TN205

刘坚, 向超前, 王方华, 易怀安. 基于相位一致性的激光熔覆熔池边缘提取方法[J]. 机械工程学报, 2018, 54(5): 166-172.

LIU Jian, XIANG Chaoqian, WANG Fanghua, YI Huaian. New Method Based on Phase Congruency for Weld Pool Edge Extraction in Laser Cladding[J]. Journal of Mechanical Engineering, 2018, 54(5): 166-172.

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基于相位一致性的激光熔覆熔池边缘提取方法

New Method Based on Phase Congruency for Weld Pool Edge Extraction in Laser Cladding

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