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Corrosion detection of internal pipeline using NDT optical inspection system

机译:使用NDT光学检查系统检测内部管道的腐蚀

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摘要

Internal pipe inspection, in many industries, is usually carried out using CCTV (Closed-Circuit TV) cameras and off-line human surveys through raw image assessment for failure identification. CCTV-based techniques have some limitations that restrict their implementation, namely: (1) the lack of visibility in the interior of the pipes and (2) the poor quality of the obtained images because of difficult lighting conditions.In this paper, we propose an intensity-based optical system for internal pipe inspection. The proposed optical system consists of a laser diode, an optical ring pattern generator and a CCD camera. The physical sensor behavior is explained using reflectance theory and experimental data. Finally, a surface map of the inside pipe wall is generated by extracting the intensity information existing in the pipe images. Defects and anomalies can be identified using this extracted image. Experiments in a realistic environment have been conducted and results are presented.
机译:在许多行业中,内部管道检查通常使用闭路电视(闭路电视)摄像机进行,并通过原始图像评估进行离线人工调查,以进行故障识别。基于CCTV的技术有一些局限性限制了它们的实现,即:(1)管道内部缺乏可见性;(2)由于光照条件困难而获得的图像质量较差。基于强度的光学系统,用于内部管道检查。拟议的光学系统由激光二极管,光学环形图案发生器和CCD摄像机组成。使用反射率理论和实验数据来解释物理传感器的行为。最后,通过提取管道图像中存在的强度信息来生成管道内壁的表面图。使用此提取图像可以识别缺陷和异常。已经在现实环境中进行了实验,并给出了结果。

著录项

  • 来源
    《NDT & E international》 |2012年第2012期|p.144-148|共5页
  • 作者

    M.S. Safizadeh; T. Azizzadeh;

  • 作者单位

    School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16887, Iran;

    School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16887, Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    corrosion detection; pipe inspection; optical inspection system;

    机译:腐蚀检测;管道检查;光学检查系统;

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