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Magnetic resonance detection of water in composite sandwich structures

机译：复合夹心结构中水的磁共振检测

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摘要

The results of a series of experiments to determine the sensitivity of magnetic resonance to water inside an aerospace-grade composite sandwich panel are presented. The measurements were performed with a purpose-built unilateral probe designed to overcome problems associated with attenuation of the radio frequency (RF) magnetic field used in magnetic resonance by the presence of conductive materials in the panel. The detection limit of the probe is 2-3 honeycomb core cells filled with water in 64 scans (measurement of approximately 1 min). Profiles of a water containing region of cells were generated by displacing the probe laterally across the panel's surface. By varying the amount of water in the cells, it was determined that the magnetic resonance signal is obtained from throughout the height of the cells, not just the region nearest the probe's coil.
机译：提出了一系列实验结果，以确定对航空航天级复合夹芯板内部的水的磁共振敏感性。使用专门设计的单边探针进行测量，该探针设计用于克服面板中存在导电材料而导致的磁共振中使用的射频（RF）磁场衰减相关的问题。探针的检测极限是在64次扫描中（测量约1分钟）2-3个充满水的蜂窝状核心细胞。通过沿面板表面横向移动探针，可以生成细胞含水区域的轮廓。通过改变细胞中的水量，可以确定从整个细胞高度中获得了磁共振信号，而不仅仅是最靠近探针线圈的区域。

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  • 来源
    《NDT & E international》 |2009年第5期|404-409|共6页
  • 作者

    Andrew E. Marble; Gabriel LaPlante; Igor V. Mastikhin; Bruce J. Balcom;

  • 作者单位

    Department of Systems and Computer Engineering, Carieton University, Ottawa, Ontario, Canada K1S 5B6;

    Departement de genie mecanique, Universite de Moncton, Moncton, New Brunswick Canada E1A 3E9;

    MRI Centre, Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, Canada E3B 5A3;

    MRI Centre, Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, Canada E3B 5A3;

  • 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

    magnetic resonance; water ingress; composite sandwich structure;

    机译：磁共振进水;复合夹层结构;

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