Experiments of Ultrasonic Sensing Using FBG Sensors

Abstract:

This research aims at investigating the response characteristics of fiber Bragg grating sensors (FBGs) to ultrasonic signals. The testing system was set up with a tunable laser source and the FBGs installed on the surface of an aluminum plate. Then the response characteristics of FBGs were compared, in condition of putting the ultrasonic driving source in the different longitudinal, lateral and angular separation. Measurements were taken by changing the distance between the sensor and the transducer from 60 mm to 200 mm with a step of 20 mm. Then keeping the distance at 100 mm and 200 mm respectively, do the angular experiment with the angle from 0° to 90° by the step of 10°. Experiment results show that FBG can get better signals when the transducer is along its axial direction. When the location of the transducer is changed linearly, no obvious linear change of the signal strength has been found.

• Periodical: Advanced Engineering Forum (Volumes 2-3)
• Pages: 148-152
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.2-3.148
• Online since: December 2011
• Authors: Wei Wei Shi, Ting Ting Hu, Yue Gang Tan
• Keywords: Fiber Bragg Grating (FBG), Ultrasonic

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