菜单
  
    摘要本论文针对3A21防锈铝双丝PMIG焊接过程,采用双CCD摄像机、近红外复合滤光-减光系统、图像采集卡和计算机等设备建立了一套熔池视觉传感系统,可以同时从熔池尾部和侧面两个方向传感视觉图像。
    设计开发了双丝PMIG焊熔池图像的处理算法—Snake算法,Snake算法也称为主动轮廓模型算法,通过给定一个初始轮廓,然后对初始轮廓曲线进行能量最小化变形,使其锁定在待分割目标的边界上,从而提取出熔池的轮廓曲线。定义并分析了铝合金双丝PMIG焊熔池视觉图像的几何特征参数,较为准确地描述了双丝焊接熔池的形态,归纳出熔池图像几何特征参数与焊接工艺参数之间的对应关系,初步建立了几何特征参数与焊接质量之间的关系模型,当后拖角大致在75°-100°、熔池最大半长在60-80范围内时多为正常焊透状态,而当后拖角大于130°、熔池最大半长骤减至30以下时多为焊塌、焊穿状态,为基于视觉传感的铝合金双丝焊接质量智能控制提供了相关的技术基础。10283
    关键词  双丝焊  焊接熔池  视觉传感  图像处理  Snake算法  特征分析
    毕业设计说明书(论文)外文摘要
    Title  Image Feature Analysis of Aluminum Alloy Welding Pool in Double Wire PMIG Welding                          
    Abstract
    A vision detecting system of collecting image of welding pool was designed in the view of the PMIG of the aluminum alloy in this thesis. This detecting system consists of two industrial CCD cameras, the compound filter system, an image gathering card and a computer. It can get the image not only from the behind of the welding pool, but also from the side of the welding pool.
    An image processing algorithm in the view of the image which was got from the process of the double wire automatic gas shield arc welding was developed. It was called snake based on the active contour models. It can extract the boundaries of the welding pool by giving an initial contour and deforming under minimum energy. Some geometry parameters of the welding pool were defined in order to accurately describe the morphological characteristics of the welding pool during the double wire automatic gas shield arc welding. After analysis, a corresponding relationship between the actual welding parameters and the geometry parameters which were gathered from the image was concluded. Besides the contrast model of the geometry parameters and the welding quality was established finally. When the rear angle ranges from 75°to 100°and the maximum half-length of the welding pool ranges from 60 to 80,the welding pool is normal. When the rear angle exceeds 130°or the maximum half-length sharply drops below 30,the welding pool is abnormal, such as burn-off. All of these conclusions would provide a technical foundation for the intelligent control of welding quality of the aluminum alloys in double wire automatic welding based on visual sensors.
    Keywords  double wire arc welding, welding pool, visual sensing, image processing, snake algorithm, characteristic analysis
     目   次
    1 引言    1
    1.1 选题意义    1
    1.2 铝合金的焊接应用现状    1
    1.3 双丝焊接技术的研究现状    2
    1.4 焊接过程中的视觉传感技术的研究现状    3
    1.5 本课题的主要研究内容    5
    2 双丝气体保护焊及其熔池视觉传感系统    6
    2.1 系统组成    6
    2.2 双丝焊接设备系统    6
    2.3 双丝焊接工艺原理及熔池特点    8
    2.4 熔池图像视觉传感系统    9
  1. 上一篇:镓掺杂氧化锌薄膜的制备及结构研究
  2. 下一篇:废旧氨纶改性煤沥青研究+文献综述
  1. 泡沫铝合金钎焊工艺性能研究

  2. 工艺参数对高硅铝合金CMT组织与性能的影响

  3. 材料加工状态对铝合金搅...

  4. 轧制态与挤压态6005A铝合金...

  5. 泡沫铝合金连接工艺与性能研究

  6. ANSYS中厚板铝合金激光+G...

  7. 铝及铝合金的硬钎焊性能研究

  8. 现代简约美式风格在室内家装中的运用

  9. C++最短路径算法研究和程序设计

  10. 高警觉工作人群的元情绪...

  11. 江苏省某高中学生体质现状的调查研究

  12. 上市公司股权结构对经营绩效的影响研究

  13. 巴金《激流三部曲》高觉新的悲剧命运

  14. g-C3N4光催化剂的制备和光催化性能研究

  15. NFC协议物理层的软件实现+文献综述

  16. 中国传统元素在游戏角色...

  17. 浅析中国古代宗法制度

  

About

优尔论文网手机版...

主页:http://www.youerw.com

关闭返回