Stabilized Fiber Optic Sensor for Ultrasound Detection

Dorighi, John; Krishnaswamy, Sridhar; Achenbach, Jan Drewes

doi:10.1007/978-1-4615-1987-4_144

Cited by 2 publications

(1 citation statement)

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“…Fiber-optic solutions for this problem do exist. The most common approach is use of an interferometric technique [11,12]. Fiber optics is particularly attractive for ultrasonic sensing as the sensors offer broadband detection capability.…”

Section: Ultrasonic Sensingmentioning

confidence: 99%

Acousto-ultrasonic sensing using fiber Bragg gratings

Betz

Thursby

Culshaw

et al. 2003

Smart Mater. Struct.

243

153

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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.

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Section: Ultrasonic Sensingmentioning

confidence: 99%