Multichannel fiber optic heterodyne interferometer for the acoustic detection of partial discharges

Julio E. Posada; Jose A. Garcia-Souto; Jesus Rubio-Serrano

doi:10.1117/12.975654

17 October 2012 Multichannel fiber optic heterodyne interferometer for the acoustic detection of partial discharges

Julio E. Posada, Jose A. Garcia-Souto, Jesus Rubio-Serrano

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84211O (2012) https://doi.org/10.1117/12.975654
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A multichannel interferometric system is proposed for the ultrasonic detection of partial discharges using intrinsic fiber optic sensors that may be immersed in oil. It is based on a heterodyne scheme which drives at least four sensor heads in order to localize the source of the acoustic emissions. The optoelectronic implementation and the experimental tests are presented to optimize the resolution (4 channels - 4 mrad). In addition, the results of ultrasound measurements at 150- kHz with an optical fiber sensor immersed in water in an acoustic test bench are shown, in which a resolution better than 10 Pa was obtained.

Citation Download Citation

Julio E. Posada, Jose A. Garcia-Souto, and Jesus Rubio-Serrano "Multichannel fiber optic heterodyne interferometer for the acoustic detection of partial discharges", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84211O (17 October 2012); https://doi.org/10.1117/12.975654

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