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首页> 外文期刊>NDT & E international >Compensated high temperature SQUID gradiometer for mobile NDE in magnetically noisy environments
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Compensated high temperature SQUID gradiometer for mobile NDE in magnetically noisy environments

机译：经补偿的高温SQUID梯度仪，用于在电磁噪声环境中的移动NDE

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摘要

Squid gradiometers can measure small localised magnetic fields in the presence of much larger background interference. Their high sensitivity at low frequencies means they are especially suited for use in eddy-current nondestructive evaluation (NDE) of aircraft and other conducting structures. However it is very challenging to rotate or tilt SQUID-based devices in the Earth's field without degradation in their sensitivity. Consequently many demonstrations of SQUID NDE have involved the SQUID remaining stationary or only being moved in a straight line. To overcome this issue, we report on the development of a simple, portable NDE scanning system which uses field cancellation techniques to allow the device orientation to change during scanning. We demonstrate that its signal-to-noise performance for defect detection in curved wing structures matches that obtained for flat samples using a stationary SQUID.
机译：鱿鱼梯度仪可以在存在大得多的背景干扰的情况下测量局部磁场。它们在低频下的高灵敏度意味着它们特别适合用于飞机和其他导电结构的涡流无损评估（NDE）。但是，在地场中旋转或倾斜基于SQUID的设备而不降低其灵敏度非常具有挑战性。因此，许多SQUID NDE演示都涉及到SQUID保持静止或仅直线移动。为了克服这个问题，我们报告了一个简单的便携式NDE扫描系统的开发情况，该系统使用场抵消技术来允许设备方向在扫描过程中发生变化。我们证明了其用于弯曲机翼结构中缺陷检测的信噪比性能与使用固定SQUID获得的平面样本匹配。

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  • 来源
    《NDT & E international》 |2012年第2012期|p.1-6|共6页
  • 作者

    S.T. Keenan; EJ. Romans;

  • 作者单位

    CSIRO Materials Science and Engineering, PO Box 218, Lindfield, NSW 2070, Australia,Department of Physics, University of Strathdyde, Glasgow G4 ONG, UK;

    London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London WC1H OAH, UK,Department of Physics, University of Strathdyde, Glasgow G4 ONG, 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; SQUID; surface flaws;

    机译：涡流乌贼;表面缺陷;

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