Fibre Bragg Grating-Based Cascaded Acoustic Sensors for Potential Marine Structural Condition Monitoring
Fibre Bragg Grating-Based Cascaded Acoustic Sensors for Potential Marine Structural Condition Monitoring
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DOI：
10.1109/jlt.2016.2587161
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发表时间：
2016-10-01
影响因子：
4.7
通讯作者：
Grattan, Kenneth T. V.
中科院分区：
文献类型：
--
作者：
Vidakovic, Miodrag;McCague, Colum;Grattan, Kenneth T. V.
本文探讨了使用多个基于光纤布拉格光栅的声发射（AE）检测传感器的潜力，从而提供了传统压电（PZT）传感器的有效替代方案，特别是在它们显示出使用局限性的地方，例如在海洋领域。研制了一种采用光滤波信号解调的级联光纤声传感器系统，并对其性能进行了广泛的评价。为了在标准化条件下进行这项工作，光学传感器系统使用玻璃板来检测声信号，然后使用金属板来评估声源的位置，当受到声电极激励时，模拟空化检测中的声检测。在这种情况下，光学声传感器的输出与配置的PZT声传感器的输出之间达到了很好的一致性。这项工作证实了这些传感器的实用性，它们不仅可以检测微弱的声发射信号，还可以实现多点同时测量，显示了它们在状态监测应用中的潜力，特别是在海洋领域。
This paper explores the potential of using multiple fibre Bragg grating-based sensors for acoustic emission (AE) detection, thus offering an effective alternative to conventional piezoelectric (PZT) sensors, especially where they have shown limitations in use, such as in the marine sector. A cascaded fibre optic acoustic sensor system, using optical filter signal demodulation has been developed and its performance extensively evaluated. To undertake this under standardized conditions, the optical sensor system was evaluated using a glass plate to detect the acoustic signal, followed by an evaluation using a metal plate to identify the location of acoustic sources, when subjected to sonotrode excitation, mimicking acoustic detection in cavitation detection. Under these circumstances, very good agreement has been reached between the outputs of the optical acoustic sensors and of the colocated PZT acoustic sensors. This work confirms the utility of these sensors-they can detect not only weak AE signals, but also enable multipoint simultaneous measurement, showing their potential for condition monitoring applications, especially in the marine sector.