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基于形态学算法的2219铝合金钨极氦弧焊熔池图像特征提取
肖宏1, 宋建岭1, 刘宪力2, 李庆庆1, 常保华3
1.天津航天长征火箭制造有限公司,天津 300462;2.首都航天机械有限公司,北京 100076;3.清华大学机械学院,北京 100084
摘要:
根据2219铝合金氦弧焊特点,构建了焊接过程实时视觉传感系统,获取了熔池清晰图像;为获得2219铝合金氦弧焊熔池尺寸参数,实现对熔池特征的分析,采用了形态学算法,提取了典型熔池图像边缘形状,并获得了熔池宽度特征尺寸;通过试验验证,提取的熔池图像宽度特征能够准确反映出熔池尺寸信息及变化趋势。研究结果表明:形态学算法准确度高、计算速度快,满足2219铝合金氦弧焊熔池图像实时处理需求,不同阈值及结构元素对图像特征提取效果均会产生较大影响,研究阈值自适应算法,可以满足工程上焊缝熔池特征实时视觉监测的复杂需求。
关键词:  形态学算法  2219铝合金  氦弧焊  图像特征提取
DOI:10.12044/j.issn.1007-2330.2019.01.015
分类号:
基金项目:
Image Feature Extraction of Helium Gas Tungsten Arc Welding Pool of 2219 Aluminum Alloy Based on Morphological Algorithm
XIAO Hong1, SONG Jianling1, LIU Xianli2, LI Qingqing1, CHANG Baohua3
1.Tianjin Aerospace Long March Rocket Manufacturing Co.LTD,Tianjin 300462;2.Capital Aerospace Machinery Company,Beijing 100076;3.Department of Mechanical Engineering,Tsinghua University,Beijing 100084
Abstract:
According to helium-arc welding characteristics of 2219 aluminum alloy,a real-time visual sensingsystem for welding process was constructed,a clear image of the molten pool was obtained. In order to obtain the sizeparameters of 2219 aluminum alloy helium arc welding pool and to analyze the characteristics of the molten pool,morphological algorithm was adopted. The edge shape of typical molten pool image was extracted and the characteristic dimension of width of molten pool was obtained. The results show that the width feature of the extracted image can reflect the weld size information accurately. The morphological algorithm has high accuracy and fast calculation speed,which can meet the real-time image processing requirements of 2219 aluminum alloy helium arc welding pool.However,different thresholds and structural elements have great influence on image feature extraction.The threshold adaptive algorithm can meet the complex requirements of real-time visual monitoring of weld pool characteristics in engineering.system for welding process was constructed,a clear image of the molten pool was obtained. In order to obtain the sizeparameters of 2219 aluminum alloy helium arc welding pool and to analyze the characteristics of the molten pool,morphological algorithm was adopted. The edge shape of typical molten pool image was extracted and the characteristic dimension of width of molten pool was obtained. The results show that the width feature of the extracted image can reflect the weld size information accurately. The morphological algorithm has high accuracy and fast calculation speed,which can meet the real-time image processing requirements of 2219 aluminum alloy helium arc welding pool.However,different thresholds and structural elements have great influence on image feature extraction.The threshold adaptive algorithm can meet the complex requirements of real-time visual monitoring of weld pool characteristics in engineering.
Key words:  Morphology algorithm  2219 Aluminium alloy  Heliarc welding  Image feature extraction