A built-in active sensor network for health monitoring of composite structures
A built-in active sensor network for health monitoring of composite structures
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DOI：
10.1088/0964-1726/15/6/050
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发表时间：
2006-12-01
影响因子：
4.1
通讯作者：
Wang, Dong
中科院分区：
文献类型：
--
作者：
Su, Zhongqing;Wang, Xiaoming;Wang, Dong
为提高飞机功能化复合材料结构的整体完整性，提出了一种嵌入式传感器网络技术。设计了一组小型化压电晶片，并将其制成电路，以配置一个内置的主动致动器/传感器网络，该网络被固定到多层复合材料层压板中。研究了该传感器网络产生和采集的兰姆波在碳纤维增强复合材料层合板中的传播特性。的加劲肋和激发频率上产生的兰姆波的传播的影响进行了评估。基于Hilbert变换、信号相关性和概率搜索，通过嵌入式网络的多个传感路径信息融合，对CF/EP（碳纤维/环氧树脂）编织层压板的分层进行了评估。一个优秀的识别能力表明相当大的应用潜力，建议的传感器网络的方法，在提供高保真的数据采集和复合材料飞机结构的状态监测。
An embedded sensor network technique was developed for improving the overall integrity of functionalized composite structures engaged in aircraft. A set of miniaturized piezoelectric wafers was designed and circuited to configure a built-in active actuator/sensor network, which was immobilized into multi-layered composite laminates. The propagation characteristics of Lamb waves generated and collected by this built-in sensor network in carbon fibre-reinforced composite laminates were investigated. The influence of a stiffener and of the excitation frequency on the propagation of the Lamb waves generated was evaluated. A study was carried out to assess delamination in CF/EP (carbon fibre/epoxy) woven laminates, by fusing information from multiple sensing paths of the embedded network on the basis of the Hilbert transform, signal correlation and probabilistic searching. An excellent identification capability indicates the considerable application potential of the proposed sensor network approach in providing high-fidelity data acquisition and condition monitoring for composite aircraft structures.