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Structural Health Monitoring Using Ultrasonic Guided-Waves and the Degree of Health Index

机译:使用超声波引导波和健康指数度的结构健康监测

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摘要

This paper proposes a new damage index named degree of health (DoH) to efficiently tackle structural damage monitoring in real-time. As a key contribution, the proposed index relies on a pattern matching methodology that measures the time-of-flight mismatch of sequential ultrasonic guided-wave measurements using fuzzy logic fundamentals. The ultrasonic signals are generated using the transmission beamforming technique with a phased-array of piezoelectric transducers. The acquisition is carried out by two phased-arrays to compare the influence of pulse-echo and pitch-catch modes in the damage assessment. The proposed monitoring approach is illustrated in a fatigue test of an aluminum sheet with an initial notch. As an additional novelty, the proposed pattern matching methodology uses the data stemming from the transmission beamforming technique for structural health monitoring. The results demonstrate the efficiency and robustness of the proposed framework in providing a qualitative and quantitative assessment for fatigue crack damage.
机译:本文提出了一种新的伤害指数,命名为良好的健康程度(DOH),以实时地有效地解决结构损坏监测。作为一个关键贡献,所提出的索引依赖于使用模糊逻辑基本面测量连续超声波测量的飞行时间不匹配的模式匹配方法。利用具有电压阵列阵列的传输波束成形技术产生超声信号。采集由两个相位阵列进行,以比较脉冲回波和俯仰模式在损伤评估中的影响。所提出的监测方法在具有初始凹口的铝板的疲劳试验中示出。作为额外的新颖性,所提出的模式匹配方法使用来自传输波束成形技术的数据进行结构健康监测。结果表明,提出框架的效率和稳健性,为疲劳裂纹损伤提供了一种定性和定量评估。

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