Extension of Fiber Bragg Grating Ultrasound Sensor Network by Adhesive Couplers

Previous studies demonstrated coupling of acoustic guided waves from one optical fiber to another through a simple adhesive bond coupler. This paper experimentally utilizes such an adhesive bond coupler to easily extend an already existing sensor network. We experimentally demonstrate this concept f...

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Bibliographic Details
Published in:Photonics 2023-12, Vol.10 (12), p.1366
Main Authors: Kim, Jee-Myung, Aboubakr, Sherif, Peters, Kara
Format: Article
Language:English
Subjects:
Acoustics
Adhesive bonding
Adhesives
Aluminum
Bond strength
Bragg gratings
Couplers
Cracks
Equipment and supplies
fiber Bragg grating sensors
Fiber optics
guided waves
Laser doppler vibrometers
Lasers
Measuring instruments
Metal plates
optical fiber sensors
Optical fibers
Plates, Aluminum
Propagation
Remote sensors
Sensors
structural health monitoring
Wave propagation
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Summary:Previous studies demonstrated coupling of acoustic guided waves from one optical fiber to another through a simple adhesive bond coupler. This paper experimentally utilizes such an adhesive bond coupler to easily extend an already existing sensor network. We experimentally demonstrate this concept for detecting simulated cracks growing from circular holes in a thin aluminum plate. A single, remotely bonded FBG sensor is used to detect the original crack growth, followed by the addition of other optical fiber segments using adhesive couplers to detect new crack growth locations on the plate. A laser Doppler vibrometer is also used to measure the guided wave propagation through the plate to verify that the changes in the FBG sensor measurements are due to the growth of the cracks.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics10121366