Development and characterization of fiber optic hydrophone coils for the detection of ultrasonic signals within power transformers

Carlos Macià-Sanahuja; Horacio Lamela

doi:10.1117/12.663761

22 April 2006 Development and characterization of fiber optic hydrophone coils for the detection of ultrasonic signals within power transformers

Carlos Macià-Sanahuja, Horacio Lamela

Author Affiliations +

Proceedings Volume 6189, Optical Sensing II; 618914 (2006) https://doi.org/10.1117/12.663761
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

In this work we present the development and characterization of highly-sensitive fibre optic coils hydrophone for the detection of ultrasonic signals. In particular, fibre coils are a good improvement, in front of electronic sensors, for the application proposed in this work, the detection of ultrasonic signals within power transformers. Several fibre optic coils are tested in a laboratory controlled environment within a suitable ultrasonic frequency range, typically associated to ultrasonic emission in power transformers. We develop and characterize several fibre optic hydrophone coils using a Mach-Zehnder interferometer. A detailed study is carried out on the ideal shape of the hydrophone fibre probe, for parameters such as sensitivity and frequency range. Also, a comparative analysis has been carried out on the sensitivity of commercial PZT to the sensitivity of the fibre optic system under the same test conditions.

Citation Download Citation

Carlos Macià-Sanahuja and Horacio Lamela "Development and characterization of fiber optic hydrophone coils for the detection of ultrasonic signals within power transformers", Proc. SPIE 6189, Optical Sensing II, 618914 (22 April 2006); https://doi.org/10.1117/12.663761

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