Betz, D. and Thursby, G.J. and Culshaw, B. and Staszewski, W. (2003) Acousto-ultrasonic sensing using fibre Bragg gratings. Smart Materials and Structures, 12 (1). pp. 122-128. ISSN 0964-1726Full text not available in this repository. (Request a copy from the Strathclyde author)
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.
|Keywords:||sensors, ultrasonic sensing, Bragg gratings, optoelectronics, Electrical engineering. Electronics Nuclear engineering, Signal Processing, Mechanics of Materials, Civil and Structural Engineering, Materials Science(all), Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Condensed Matter Physics|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Strathprints Administrator|
|Date Deposited:||14 Jun 2007|
|Last modified:||23 Sep 2016 02:04|