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首页> 外文会议>Asian-Australasian Conference on Composite Materials;ACCM; 20061127-30;20061127-30; Hong Kong(CN);Hong Kong(CN) >Fiber Bragg Grating Sensor/Piezoelectric Actuator Hybrid System for Damage Detection in Composite Laminates
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Fiber Bragg Grating Sensor/Piezoelectric Actuator Hybrid System for Damage Detection in Composite Laminates

机译：用于复合材料层压板损伤检测的光纤光栅传感器/压电执行器混合系统

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摘要

In this paper, fiber Bragg grating (FBG) sensor and piezoelectric (PZT) actuator are used to develop a hybrid system for the evaluation of delamination in glass fiber-reinforced epoxy (GF/EP) composite laminates. The surface-bonded PZT actuator generates ultrasonic Lamb wave in the composite laminates, while the FBG sensor, which is embedded in the composite laminates, captures the Lamb wave signal. Wavelet analysis is introduced to extract signal spectrographic characteristics in the time-scale domain appropriately. Since the propagation characteristics of Lamb wave is altered by the existence of damage in the composite laminates, delamination information can be obtained from the received signal. With the assistance of a signal generation and an acquisition system, this methodology enables active sensing and non-destructive evaluation of delamination in the composite laminates. Experiments have been carried out with GF/EP composite beams to examine the feasibility of the proposed detection technique. The acquired and processed Lamb wave signals corresponding to different delamination sizes are compared.
机译：在本文中，使用光纤布拉格光栅（FBG）传感器和压电（PZT）执行器开发了一种混合系统，用于评估玻璃纤维增​​强环氧（GF / EP）复合层压板的分层。表面结合的PZT执行器在复合材料层压板中产生超声波兰姆波，而嵌入复合材料层压板中的FBG传感器捕获兰姆波信号。引入小波分析以适当地提取时标域中的信号光谱特征。由于复合材料层压板中损坏的存在改变了兰姆波的传播特性，因此可以从接收到的信号中获得分层信息。借助信号生成和采集系统，该方法可以对复合层压板中的分层进行主动感应和非破坏性评估。已经对GF / EP复合梁进行了试验，以检验所提出的检测技术的可行性。比较对应于不同分层大小的获取和处理的兰姆波信号。

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