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材料导报  2024, Vol. 38 Issue (2): 22070278-7    https://doi.org/10.11896/cldb.22070278
  金属与金属基复合材料 |
基于边缘梯度搜索的激光定向能量沉积熔池尺寸提取方法
苗立国1,2, 邢飞1,2,*, 史建军2, 柴媛欣1, 闫成鑫1, 卞宏友1, 孙海江1
1 沈阳工业大学机械工程学院,沈阳 110000
2 南京中科煜宸激光技术有限公司,南京 210038
Melt Pool Size Extraction Method in Laser Directed Energy Deposition Based on Edge Gradient Search
MIAO Liguo1,2, XING Fei1,2,*, SHI Jianjun2, CHAI Yuanxin1, YAN Chengxin1, BIAN Hongyou1, SUN Haijiang1
1 College of Mechanical Engineering, Shenyang University of Technology, Shenyang 110000, China
2 Nanjing Zhongke Raycham Laser Technology Co., Ltd., Nanjing 210038, China
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摘要 针对激光定向能量沉积过程中存在熔池弱边缘导致熔池宽度难以准确提取的问题,本工作基于熔池边缘灰度梯度变化差异,提出了一种基于边缘梯度搜索模型的熔池宽度提取方法。为了得到精确的熔池尺寸,首先基于数学形态学的方法对熔池图像进行预处理得到粗定位边缘,然后通过试验确定弱边缘梯度阈值,最后采用边缘梯度搜索模型对粗定位边缘进一步分割得到精分割边缘,使用椭圆拟合法进行边缘拟合得到熔池宽度,试验结果表明该方法具有良好的熔池宽度检测精度。
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苗立国
邢飞
史建军
柴媛欣
闫成鑫
卞宏友
孙海江
关键词:  激光定向能量沉积  边缘提取  边缘梯度搜索  椭圆拟合    
Abstract: Aiming at the problem of being difficult in melt pool width extraction in laser directed energy deposition due to the interference of weak edges, a method for extracting the edge based on edge gradient search was presented based on the difference of gray gradient change of melt pool edge. In order to extract accurate melt pool edge size. First, the melt pool roughly edge was obtained by preprocessing the melt pool image based on mathematical morphology. Then the weak edge gradient threshold was determined through experiments. Finally, the edge gradient search model was adopted to further segmentation the melt pool roughly edge to obtain the precise segmentation edge, and the ellipse fitting method was used to fit the edge of fine segmentation to obtain the weld pool width. Experiment results indicate that the melt pool width can be detected accurately.
Key words:  laser directed energy deposition    edge extraction    edge gradient search    ellipse fitting
出版日期:  2024-01-25      发布日期:  2024-01-26
ZTFLH:  TN205  
基金资助: 国家科技重大专项(2019-Ⅶ-0004-0144);辽宁“百千万人才工程”资助项目(LNBQW 2020B0050);辽宁省“兴辽英才计划”项目(XLYC1902022)
通讯作者:  *邢飞,沈阳工业大学机械工程学院教授、博士研究生导师。2003年东北大学机械电子工程专业本科毕业,2005年中国科学院沈阳自动化研究所机械电子工程专业硕士毕业,2009年中国科学院沈阳自动化研究所机械电子工程专业博士毕业。目前主要从事智能制造、高端装备制造等方面的研究工作。在Optics & Laser Technology、Science and Technology of Welding and Joining、《中国激光》等期刊发表论文30余篇。xingfei@raycham.com   
作者简介:  苗立国,分别在2016年6月、2019年6月于沈阳工业大学获得工学学士学位和硕士学位。现为沈阳工业大学机械工程学院博士研究生,在邢飞教授的指导下进行研究工作。目前主要研究领域为机器视觉、增材制造智能化控制等。
引用本文:    
苗立国, 邢飞, 史建军, 柴媛欣, 闫成鑫, 卞宏友, 孙海江. 基于边缘梯度搜索的激光定向能量沉积熔池尺寸提取方法[J]. 材料导报, 2024, 38(2): 22070278-7.
MIAO Liguo, XING Fei, SHI Jianjun, CHAI Yuanxin, YAN Chengxin, BIAN Hongyou, SUN Haijiang. Melt Pool Size Extraction Method in Laser Directed Energy Deposition Based on Edge Gradient Search. Materials Reports, 2024, 38(2): 22070278-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.22070278  或          http://www.mater-rep.com/CN/Y2024/V38/I2/22070278
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