PDF(Pubmed)
Abstract：
Ultrasonic guided waves, which are often generated and detected by piezoelectric transducers, are well established to monitor engineering structures. Wireless solutions are sought to eliminate cumbersome wire installation. This work proposes a method for remote ultrasonic-based structural health monitoring (SHM) using mechanoluminescence (ML). Propagating guided waves transmitted by a piezoelectric transducer attached to a structure induce elastic deformation that can be captured by elastico-ML. An ML coating composed of copper-doped zinc sulfide (ZnS:Cu) particles embedded in PVDF on a thin aluminium plate can be used to achieve the elastico-ML for the remote sensing of propagating guided waves. The simulation and experimental results indicated that a very high voltage would be required to reach the threshold pressure applied to the ML particles, which is about 1.5 MPa for ZnS particles. The high voltage was estimated to be 214 Vpp for surface waves and 750 Vpp for Lamb waves for the studied configuration. Several possible technical solutions are suggested for achieving ultrasonic-induced ML for future remote SHM systems.
摘要：
超声导波,通常由压电换能器产生和检测，建立了良好的监测工程结构。寻求无线解决方案以消除繁琐的有线安装。这项工作提出了一种使用机械发光（ML）进行基于超声波的远程结构健康监测（SHM）的方法。由连接到结构的压电换能器传输的传播导波会引起弹性变形，该弹性变形可以由elastico-ML捕获。由嵌入在薄铝板上的PVDF中的铜掺杂硫化锌（ZnS：Cu）颗粒组成的ML涂层可用于实现弹性ML，以遥感传播的导波。模拟和实验结果表明，要达到施加到ML颗粒的阈值压力，需要非常高的电压，对于ZnS颗粒,约为1.5MPa。对于所研究的配置，对于表面波，高电压估计为214Vpp，对于兰姆波估计为750Vpp。提出了几种可能的技术解决方案，以实现未来远程SHM系统的超声诱导ML。
