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Proceedings Paper

Multichannel fiber optic heterodyne interferometer for the acoustic detection of partial discharges
Author(s): Julio E. Posada; Jose A. Garcia-Souto; Jesus Rubio-Serrano
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Paper 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.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84211O (17 October 2012); doi: 10.1117/12.975654
Show Author Affiliations
Julio E. Posada, Univ. Carlos III de Madrid (Spain)
Jose A. Garcia-Souto, Univ. Carlos III de Madrid (Spain)
Jesus Rubio-Serrano, Univ. Carlos III de Madrid (Spain)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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