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Real-time electrical impedance resonance shift of piezoelectric sensor for detection of damage in honeycomb core sandwich structures

机译:压电传感器的实时电阻抗共振位移,用于检测蜂窝芯夹心结构中的损坏

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摘要

A simple and low cost method for structural health monitoring of honeycomb composite shaped in cantilever beam was reported. A lead zirconate titanate (PZT) sensor was attached to the cantilever beam and vibrated resonantly. The real-time imaginary part of electrical impedance of PZT sensor was measured to correlate with the induced mechanical impedance resonance shift of cantilever beam when a proof mass was moved on top of cantilever beam. When a defect was present, it caused a disrupted change of imaginary part of electrical impedance. Such detection is real-time so that no baseline is required to identify the defect accurately.
机译:报道了一种简单,低成本的悬臂梁形蜂窝复合材料结构健康监测方法。锆酸钛酸铅(PZT)传感器连接到悬臂梁并共振。当检测质量在悬臂梁的顶部移动时,测量PZT传感器电阻的实时虚部,使其与悬臂梁的感应机械阻抗共振位移相关。当存在缺陷时,会导致电阻抗的虚部变化中断。这种检测是实时的,因此不需要基线即可准确识别缺陷。

著录项

  • 来源
    《NDT & E international》 |2015年第12期|61-65|共5页
  • 作者单位

    Centre for Mechanics of Microsystem (CMMS), School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;

    Centre for Mechanics of Microsystem (CMMS), School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;

    Centre for Mechanics of Microsystem (CMMS), School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;

  • 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

    Structural health monitoring; Real-time; Electrical impedance; Piezoelectric; Synthesized composite;

    机译:结构健康监测;即时的;电阻抗压电合成复合材料;

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