Optic fibre sensor for real-time damage detection in smart composite

被引：16

作者：

de Oliveira, R

Frazao, O

Santos, JL

Marques, AT

机构：

[1] Univ Porto, Fac Engn, INEGI, Dept Mech, P-4200465 Oporto, Portugal

[2] Univ Porto, Dept Fis, P-4169007 Oporto, Portugal

[3] INESC PORTO, Unidade Optoelectron & Sistemas Electron, P-4169007 Oporto, Portugal

[4] INEGI, P-4465591 Leca Balio, Portugal

[5] Le Mans Univ, IUT GMP, Composites & Mech Struct Grp, F-72085 Le Mans 9, France

来源：

COMPUTERS & STRUCTURES | 2004年 / 82卷 / 17-19期

关键词：

optic sensor; composite materials; acoustic emission; strain monitoring; cavity interrogation; pattern recognition; neural network;

D O I：

10.1016/j.compstruc.2004.03.028

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

In this study an optical fibre sensor system was conceived for simultaneous detection of the strain and the acoustic emission due to damage. It consists of a fibre Bragg grating and a Fabry-Perot interferometer. For the interrogation of the Fabry-Perot cavity, an innovative low cost process based on the generation of two quadrature phase-shifted signals using two fibre Bragg gratings was implemented, allowing the recovery of the change in the cavity length. An automated processing system, based on Kohonen's self-organizing maps is also presented, for future classification of the acoustic emission waves detected by the optic fibre sensor. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1315 / 1321

页数：7

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