Intrinsic and extrinsic fiber Fabry‐Perot sensors for acoustic detection in liquids

Abstract

This article reports the development of two sensing head configurations based on extrinsic and intrinsic fiber Fabry‐Pérot interferometers for the detection of incipient faults in oil‐filled power transformers. The performances of the sensing heads are characterized and compared with the situations where it operates in air, water, and oil and promising results are obtained, which will allow the industrial development of practical solutions. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1129–1134, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25139

A Study of the Effect of Absorbing Materials in the UHF Sensor

“…Partial discharge (PD) analysis is a diagnostic approach that uses PD measurements to evaluate the integrity of the equipment. The UHF technique for PD detection has been extensively applied in gas insulated switchgears (GIS) [1] substations worldwide with excellent results both during high voltage on-line commissioning tests and condition monitoring [2]. Due to the dimension constraints of the dielectric aperture the external UHF sensors fitted to, dimensions of the UHF sensor antenna are limited to 40mm×120 mm.…”