Monitoring the condition of Marine Renewable Energy Devices through underwater Acoustic Emissions: Case study of a Wave Energy Converter in Falmouth Bay, UK
Monitoring the condition of Marine Renewable Energy Devices through underwater Acoustic Emissions: Case study of a Wave Energy Converter in Falmouth Bay, UK
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DOI：
10.1016/j.renene.2016.10.049
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发表时间：
2017-03
期刊：
影响因子：
8.7
通讯作者：
J. Walsh;J. Walsh;Imran Bashir;Joanne K. Garrett;P. Thies;P. Blondel;L. Johanning
中科院分区：
文献类型：
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作者：
J. Walsh;J. Walsh;Imran Bashir;Joanne K. Garrett;P. Thies;P. Blondel;L. Johanning
维持海洋可再生能源设备（mred）的工程健康是其经济可行性的主要限制之一，因为在具有挑战性的条件下需要昂贵的海洋干预措施。声发射（AE）状态监测是常规和成功地用于陆基设备，本文展示了如何在水下使用它。我们回顾了mred运行时的声学特征和可能的失效模式，为通用分类系统提供了基础。这是在法尔茅斯湾（英国）测试的波浪能量转换器，监测了2年。在此期间，水下噪音水平在10赫兹到32千赫之间，包括工作和非活动期间。宽带MRED对环境噪声的贡献通常可以忽略不计。时频分析用于检测特定操作活动的声学特征（60 Hz-5 kHz），例如有源电源起飞，并将其与工程和环境条件联系起来。这些初步结果证明了利用水声发射监测mred的健康状况和性能的可行性。
Maintaining the engineering health of Marine Renewable Energy Devices (MREDs) is one of the main limits to their economic viability, because of the requirement for costly marine interventions in challenging conditions. Acoustic Emission (AE) condition monitoring is routinely and successfully used for land-based devices, and this paper shows how it can be used underwater. We review the acoustic signatures expected from operation and likely failure modes of MREDs, providing a basis for a generic classification system. This is illustrated with a Wave Energy Converter tested at Falmouth Bay (UK), monitored for 2 years. Underwater noise levels have been measured between 10 Hz and 32 kHz throughout this time, covering operational and inactive periods. Broadband MRED contributions to ambient noise are generally negligible. Time-frequency analyses are used to detect acoustic signatures (60 Hz–5 kHz) of specific operational activities, such as the active Power Take Off, and relate them to engineering and environmental conditions. These first results demonstrate the feasibility of using underwater Acoustic Emissions to monitor the health and performance of MREDs.