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首页> 外文期刊>NDT & E international >Lift-off invariant inductance of steels in multi-frequency eddy-current testing
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Lift-off invariant inductance of steels in multi-frequency eddy-current testing

机译：多频涡流测试中钢的剥离不变电感

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摘要

Eddy current testing can be used to interrogate steels but it is hampered by the lift-off distance of the sensor. Previously, the lift-off point of intersection (LOI) feature has been found for the pulsed eddy current (PEC) testing. In this paper, a lift-off invariant inductance (LII) feature is proposed for the multi -frequency eddy current (MEC) testing, which merely targets the ferromagnetic steels. That is, at a certain working frequency, the measured inductance signal is found nearly immune to the lift-off distance of the sensor. Such working frequency and inductance are termed as the lift-off invariant frequency (LIF) and LII. Through simulations and experimental measurements of different steels under the multi-frequency manner, the LII has been verified to be merely related to the sensor parameters and independent of different steels. By referring to the LIF of the test piece and using an iterative inverse solver, one of the steel properties (either the electrical conductivity or magnetic permeability) can be reconstructed with a high accuracy.
机译：涡流测试可用于询问钢材，但它被传感器的升降距离所阻碍。以前，已经找到了脉冲涡流（PEC）测试的交叉点（LOI）特征的提升点。在本文中，提出了一种用于多频涡流（MEC）测试的剥离不变电感（LII）特征，其仅针对铁磁钢。也就是说，在某个工作频率下，发现测量的电感信号几乎免受传感器的提升距离。这种工作频率和电感被称为升降不变频率（LIF）和LII。通过在多频化的不同钢的模拟和实验测量下，已经验证了LII以仅与传感器参数相关并独立于不同的钢。通过参考试验片的LIF并使用迭代逆求解器，可以以高精度重建钢属性（导电性或磁导电性）之一。

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  • 来源
    《NDT & E international》 |2021年第7期|102458.1-102458.8|共8页
  • 作者

    Mingyang Lu; Xiaobai Meng; Ruochen Huang; Liming Chen; Anthony Peyton; Wuliang Yin;

  • 作者单位

    School of Electrical and Electronic Engineering University of Manchester Oxford Road Manchester M13 9PL UK;

    School of Electrical and Electronic Engineering University of Manchester Oxford Road Manchester M13 9PL UK Faculty of Art Science and Technology University of Northampton Northampton NN1 5PH UK;

    School of Electrical and Electronic Engineering University of Manchester Oxford Road Manchester M13 9PL UK;

    School of Electrical and Electronic Engineering University of Manchester Oxford Road Manchester M13 9PL UK;

    School of Electrical and Electronic Engineering University of Manchester Oxford Road Manchester M13 9PL UK;

    School of Electrical and Electronic Engineering University of Manchester Oxford Road Manchester M13 9PL UK;

  • 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 testing; Lift-off invariance; Property measurement; Multi-frequency; Non-destructive testing;

    机译：涡流测试;剥离不变性;物业测量;多频;非破坏性测试;

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