Stawiarski Adam, Muc Aleksander
Institute of Machine Design, Cracow University of Technology, 31-155 Kraków, Poland.
Sensors (Basel). 2019 Apr 25;19(8):1937. doi: 10.3390/s19081937.
In this paper, the elastic wave propagation method was used in damage detection in thin structures. The effectiveness and accuracy of the system based on the wave propagation phenomenon depend on the number and localization of the sensors. The utilization of the piezoelectric (PZT) transducers makes possible to build a low-cost damage detection system that can be used in structural health monitoring (SHM) of the metallic and composite structures. The different number and localization of transducers were considered in the numerical and experimental analysis of the wave propagation phenomenon. The relation of the sensors configuration and the damage detection capability was demonstrated. The main assumptions and requirements of SHM systems of different levels were discussed with reference to the damage detection expectations. The importance of the damage detection system constituents (sensors number, localization, or damage index) in different levels of analysis was verified and discussed to emphasize that in many practical applications introducing complicated procedures and sophisticated data processing techniques does not lead to improving the damage detection efficiency. Finally, the necessity of the appropriate formulation of SHM system requirements and expectations was underlined to improve the effectiveness of the detection methods in particular levels of analysis and thus to improve the safety of the monitored structures.
本文采用弹性波传播方法对薄结构进行损伤检测。基于波传播现象的系统的有效性和准确性取决于传感器的数量和定位。压电（PZT）传感器的使用使得构建一种低成本的损伤检测系统成为可能，该系统可用于金属和复合结构的结构健康监测（SHM）。在波传播现象的数值和实验分析中考虑了不同数量和定位的传感器。证明了传感器配置与损伤检测能力之间的关系。参照损伤检测期望，讨论了不同级别结构健康监测系统的主要假设和要求。验证并讨论了损伤检测系统组成部分（传感器数量、定位或损伤指标）在不同分析级别中的重要性，以强调在许多实际应用中，引入复杂的程序和复杂的数据处理技术并不会提高损伤检测效率。最后，强调了适当制定结构健康监测系统要求和期望的必要性，以提高特定分析级别中检测方法的有效性，从而提高被监测结构的安全性。
