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首页> 外文期刊>Smart Materials & Structures >Hierarchical fiber-optic-based sensing system: Impact damage monitoring of large-scale CFRP structures
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Hierarchical fiber-optic-based sensing system: Impact damage monitoring of large-scale CFRP structures

机译：基于光纤的分层传感系统：大型CFRP结构的冲击损伤监测

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摘要

This study proposes a novel fiber-optic-based hierarchical sensing concept for monitoring randomly induced damage in large-scale composite structures. In a hierarchical system, several kinds of specialized devices are hierarchically combined to form a sensing network. Specifically, numerous three-dimensionally structured sensor devices are distributed throughout the whole structural area and connected with an optical fiber network through transducing mechanisms. The distributed devices detect damage, and the fiber-optic network gathers the damage signals and transmits the information to a measuring instrument. This study began by discussing the basic concept of a hierarchical sensing system through comparison with existing fiber-optic-based systems, and an impact damage detection system was then proposed to validate the new concept. The sensor devices were developed based on comparative vacuum monitoring (CVM), and Brillouin-based distributed strain measurement was utilized to identify damaged areas. Verification tests were conducted step-by-step, beginning with a basic test using a single sensor unit, and, finally, the proposed monitoring system was successfully verified using a carbon fiber reinforced plastic (CFRP) fuselage demonstrator. It was clearly confirmed that the hierarchical system has better repairability, higher robustness, and a wider monitorable area compared to existing systems.
机译：这项研究提出了一种新颖的基于光纤的分层传感概念，用于监视大型复合结构中的随机诱发损伤。在分级系统中，将几种专用设备分级组合以形成传感网络。具体地，许多三维结构的传感器装置分布在整个结构区域中，并通过换能机构与光纤网络连接。分布式设备检测损坏，光纤网络收集损坏信号并将信息传输到测量仪器。这项研究首先通过与现有的基于光纤的系统进行比较来讨论分层传感系统的基本概念，然后提出了一种冲击损伤检测系统来验证新概念。传感器设备是基于比较真空监测（CVM）开发的，基于布里渊的分布式应变测量被用于识别受损区域。验证测试是逐步进行的，首先是使用单个传感器单元进行基本测试，最后，使用碳纤维增强塑料（CFRP）机身演示器成功验证了所建议的监控系统。显然已经证实，与现有系统相比，分层系统具有更好的可修复性，更高的鲁棒性和更大的可监视区域。

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