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A unified approach for the structural health monitoring of waveguides

机译：波导结构健康监测的统一方法

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In this article, the simultaneous use of ultrasonic testing and impedance-based technique to monitor the health of structural waveguides is proposed. Methods based on the propagation of guided waves are increasingly used in all those structural health monitoring applications that benefit from built-in transduction, moderately large inspection ranges, and high sensitivity to small flaws. In the meantime, impedance-based method promises to adequately assess the structural integrity of simple and complex structures that include welds and bolts. As both wave-based and impedance-based approaches can utilize piezoelectric transducers (lead zirconate titanate) bonded or embedded to the structure being monitored, this article describes a unified structural health monitoring paradigm where these techniques are employed simultaneously, driven by the same sensing/hardware/software unit. Specifically, we propose to use two lead zirconate titanates controlled by a National Instruments-PXI running in LabVIEW. An ad hoc LabVIEW Virtual Instrument controls signal output and input as well as processing and storage. To assess the feasibility of this unified system, an aluminum plate and a steel pipe were monitored. Damage was simulated by changing the boundary conditions of each structure. The results show that the proposed system is robust and can be developed further to address the challenges associated with the structural health monitoring of complex structures.
机译：在本文中，提出了同时使用超声测试和基于阻抗的技术来监视结构波导的健康状况的建议。在所有结构健康监测应用中，越来越多地使用基于导波传播的方法，这些方法得益于内置转导，适度的大检查范围以及对小缺陷的高灵敏度。同时，基于阻抗的方法有望充分评估包括焊接和螺栓在内的简单和复杂结构的结构完整性。由于基于波的方法和基于阻抗的方法都可以利用粘结或嵌入被监测结构的压电换能器（锆钛酸铅），因此本文介绍了一种统一的结构健康监测范例，其中，在相同的传感/驱动下，同时采用了这些技术。硬件/软件单元。具体来说，我们建议使用由LabVIEW运行的National Instruments-PXI控制的锆钛酸铅。特定的LabVIEW虚拟仪器可控制信号的输出和输入以及处理和存储。为了评估该统一系统的可行性，对铝板和钢管进行了监控。通过改变每个结构的边界条件来模拟破坏。结果表明，所提出的系统是健壮的，并且可以进一步开发以解决与复杂结构的结构健康监控相关的挑战。

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