Development of Ultrasonic Optical Fiber Hydrogen Sensor

Jung Cheol Yoo; Chang Doo Kee; Il Kwon Oh

doi:10.4028/www.scientific.net/AST.65.163

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Development of Ultrasonic Optical Fiber Hydrogen Sensor
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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 65Development of Ultrasonic Optical Fiber Hydrogen...

Development of Ultrasonic Optical Fiber Hydrogen Sensor

Abstract:

In this study, an ultrasonic optical fiber hydrogen sensor was newly developed for monitoring and detecting hydrogen leakages. Previously, we developed a pulse-echo sensor system for health monitoring system. Ultrasonic wave, generated from a piezoelectric actuator, is guided and propagated through the optical fiber and subsequently sensed by a piezoelectric sensor in the pulse-echo sensor system. For the detection of hydrogen, the optical fiber was coated with palladium particles, which expanded on exposure to hydrogen. Palladium was used, because it adsorbs hydrogen gas and swell slightly to form palladium hydride with exposure to hydrogen. The change in palladium dimensions affects the wave propagation impedance of optical fiber for detecting the hydrogen gas, and this method has been applied to the pulse-echo sensor systems. Our results showed that the ultrasonic-optical fiber hydrogen sensor can be successfully employed for hydrogen detecting system.

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Periodical:

Advances in Science and Technology (Volume 65)

Pages:

163-167

DOI:

https://doi.org/10.4028/www.scientific.net/AST.65.163

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Online since:

October 2010

Authors:

Jung Cheol Yoo, Chang Doo Kee, Il Kwon Oh

Keywords:

Hydrogen Sensor, Optical Fiber Sensor (OFS), PZT Material, Ultrasonic Wave (UW)

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