Advanced spectral fiber optic sensor systems and their application in energy facility monitoring

Various spectral-encoded fiber optic sensor concepts and advanced system solutions for application in energy facility monitoring have been investigated. The technological maturity, high performance and reliability of multiplexed fiber Bragg grating (FBG) sensor arrays and networks for the measurement of temperature, dynamic strain, air flow, and magnetic field distributions in electric power generators increasing their efficiency will be demonstrated by selected examples of field testing under harsh environmental conditions. For high-temperature combustion monitoring in gas turbines, beside silica FBGs with enhanced temperature stability also sapphire FBGs and Fabry-Perot sensors have been tested and evaluated as well as fiber-based black-body thermal radiation sensors. Finally, the potential of FBG sensors for application in cryo-energetic facilities such as super-conductive high-power motors and experimental nuclear fusion reactors will be discussed.

[1]  J. Mora,et al.  A magnetostrictive sensor interrogated by fiber gratings for DC-current and temperature discrimination , 2000, IEEE Photonics Technology Letters.

[2]  Ines Latka,et al.  Fiber-optic Bragg grating sensors for structural health monitoring at cryogenic temperatures , 2007, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[3]  Ines Latka,et al.  Fiber-optic Bragg gratings as magnetic field-insensitive strain sensors for the surveillance of cryogenic devices , 2009 .

[4]  Thomas Bosselmann,et al.  Distributed optical flow sensing using a novel fiber Bragg grating sensor , 2005, International Conference on Optical Fibre Sensors.

[5]  H. Bartelt,et al.  Optical fibre Bragg gratings for high temperature sensing , 2009, International Conference on Optical Fibre Sensors.

[6]  Anbo Wang,et al.  Self-calibrated interferometric-intensity-based optical fiber sensors , 2001 .

[7]  M Gottlieb,et al.  Fiber-optic temperature sensor based on internally generated thermal radiation. , 1981, Applied optics.

[8]  S. Mihailov,et al.  Sapphire fiber Bragg grating sensor made using femtosecond laser radiation for ultrahigh temperature applications , 2004, IEEE Photonics Technology Letters.

[9]  Ines Latka,et al.  Inscription and characterization of Bragg gratings in single-crystal sapphire optical fibres for high-temperature sensor applications , 2009 .

[10]  Zhiyong Wang,et al.  Self-Calibrated Interferometric/Intensity Based Fiber Optic Temperature Sensors , 2000 .

[11]  W. Ecke,et al.  FBG sensor interrogation on rotating parts of large machines in power generation plants , 2008, International Conference on Optical Fibre Sensors.