Acousto-ultrasonic sensing using fiber Bragg gratings
Acousto-ultrasonic sensing using fiber Bragg gratings
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DOI：
10.1088/0964-1726/12/1/314
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发表时间：
2003-02-01
影响因子：
4.1
通讯作者：
Staszewski, WJ
中科院分区：
文献类型：
--
作者：
Betz, DC;Thursby, G;Staszewski, WJ
本文介绍了一种用于结构超声检测的光纤系统。传感系统的目的是监测结构，特别是飞机结构，通过检测超声波兰姆波。近年来，这类监测技术已成为结构健康监测的热点。最常见的方法是使用压电陶瓷装置发射和接收超声波。基于光纤光栅传感器的兰姆波检测是一种新的光纤检测方法。除了众所周知的光纤传感器的优点外，这种新的询问方案允许使用布拉格光栅进行高分辨率应变和高速超声检测。本文的重点是系统的超声波部分。本文阐述了该系统的理论方法和在实验室中的实现，并对系统进行了标定，初步结果表明该系统用于检测超声波兰姆波是可行的。
This paper describes a fiber-optic system which is able to detect ultrasound in structures. The aim of the sensing system is to monitor structures, in particular aircraft structures, by detecting ultrasonic Lamb waves. This type of monitoring technique has recently become a key topic in structural health monitoring. Most common approaches use piezoceramic devices to launch and receive the ultrasound. A new way of fiber-optic detection of Lamb waves is based on fiber Bragg grating sensors. In addition to the well known advantages of fiber-optic sensors, this new interrogation scheme allows the use of Bragg gratings for both high-resolution strain and high-speed ultrasound detection. The focus of the paper is on the ultrasonic part of the system. The theoretical approach and the implementation into a laboratory set-up are elaborated, Experiments have been carried out to calibrate the system and first results on simple structures show the feasibility of the system for sensing ultrasonic Lamb waves.