Acousto-ultrasonic sensing using fibre Bragg gratings

D. Betz, G.J. Thursby, B. Culshaw, W. Staszewski

Research output: Contribution to journalArticle

245 Citations (Scopus)

Abstract

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.
LanguageEnglish
Pages122-128
Number of pages6
JournalSmart Materials and Structures
Volume12
Issue number1
DOIs
Publication statusPublished - 2003

Fingerprint

Fiber Bragg gratings
Bragg gratings
Lamb waves
ultrasonics
Ultrasonics
Surface waves
fiber optics
fibers
Ultrasonic waves
Fiber optics
aircraft structures
structural health monitoring
Structural health monitoring
sensors
interrogation
Optical resolving power
Fiber optic sensors
Aircraft
high speed
Monitoring

Keywords

  • sensors
  • ultrasonic sensing
  • Bragg gratings
  • optoelectronics

Cite this

Betz, D. ; Thursby, G.J. ; Culshaw, B. ; Staszewski, W. / Acousto-ultrasonic sensing using fibre Bragg gratings. In: Smart Materials and Structures. 2003 ; Vol. 12, No. 1. pp. 122-128.
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Acousto-ultrasonic sensing using fibre Bragg gratings. / Betz, D.; Thursby, G.J.; Culshaw, B.; Staszewski, W.

In: Smart Materials and Structures, Vol. 12, No. 1, 2003, p. 122-128.

Research output: Contribution to journalArticle

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