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Eddy current probes of inclined coils for increased detectability of circumferential cracks in tubing

机译：倾斜线圈的涡流探头可提高对管道中圆周裂纹的检测能力

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摘要

Conventional bobbin probes, multi-pancake and/or rotating pancake probes, and transmit-receive probes for eddy current tests (ECTs) are currently used to test metal tubing. Each method has its respective strengths and weaknesses considering their characteristics such as test speed, flaw detection sensitivity, and probe structure complexity. This paper proposes a novel eddy current probe with new features. The structure is designed to be sensitive to circumferential cracks, which are not easily detected using conventional bobbin coil probes, as well as longitudinal cracks. The directions of the eddy current around the coils were designed to be not circumferential. The ECT signals of these probes were acquired and analyzed from the artificial defects manufactured for this study. The experimental results show that the proposed probes are more sensitive to circumferential defects than the comparable conventional bobbin probes. In addition, the proposed probes are also sensitive to axial defects. By employing both the new probes and the conventional bobbin probes, ECTs for the metal tubing can be performed more reliably.
机译：当前使用常规的线轴探针，多层煎饼和/或旋转煎饼探针以及用于涡流测试（ECT）的发射-接收探针来测试金属管。考虑到它们的特性（例如测试速度，探伤灵敏度和探针结构复杂性），每种方法都有其各自的优缺点。本文提出了一种具有新功能的新型涡流探头。该结构被设计成对周向裂纹敏感，而周向裂纹是使用传统绕线管线圈探头不容易检测到的，并且对纵向裂纹也很敏感。线圈周围的涡流方向设计为非圆周方向。这些探针的ECT信号是从为该研究制造的人工缺陷中获取和分析的。实验结果表明，所提出的探针对周向缺陷的敏感性比传统的筒管探针更高。另外，提出的探针也对轴向缺陷敏感。通过同时使用新探针和常规线轴探针，可以更可靠地执行金属管的ECT。

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  • 来源
    《NDT & E international》 |2012年第2012期|p.77-82|共6页
  • 作者

    Young-Joo Kim; Seung-Seok Lee;

  • 作者单位

    Center for Safety Measurement, Korea Research Institute of Standards and Science, PO Box 102, Yuseong-Cu, Daejeon 305-600, Republic of Korea;

    Center for Safety Measurement, Korea Research Institute of Standards and Science, PO Box 102, Yuseong-Cu, Daejeon 305-600, Republic of Korea;

  • 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

    eddy current test; inclined coil; circumferential flaws; steam generator tube;

    机译：涡流测试;倾斜线圈圆周缺陷;蒸汽发生器管;

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