Fiber Bragg Grating temperature monitoring of helicopter engine mechanical parts on an engine test bench
Résumé
Next generation aircraft or helicopter engine monitoring requires a number of different sensors including temperature, strain or pressure sensing. Fiber Bragg Grating (FBG) technology is of particular interest for this application since it provides high multiplexing capability, low intrusiveness due to the small size, immunity to electro-magnetic interference as well as resistance to harsh environments.
In this paper, FBG-temperature monitoring results of two mechanical parts in the exhaust system of a helicopter engine test bench are presented. Fabrication of FBG lines and fiber integration on those two mechanical parts are first presented. After a description of the setup and of the optoelectronic interrogation units used, measurement results as high as 600°C are exposed and compared to standard temperature measurements using thermocouple (TC) technology as well as infrared images. Average temperature gradients along vertical and horizontal directions of the first mechanical part are calculated and a short-time Fourier transform of a FBG signal acquired at 5 kHz is performed and described as well.
Mots clés
infrared image
temperature gradient
Fourier transform
signal processing
instrumentation
aircraft monitoring
helicopter monitoring
monitoring
sensor
emperature
strain
pressure
Fiber Bragg Grating
multiplexing
intrusiveness
electro-magnetic interference immunity
harsh environment
helicopter engine test bench
Fabrication
fiber integration
optoelectronic interrogation
thermocouple
Fichier principal
Article OFS_final.pdf (659.15 Ko)
Télécharger le fichier
Fichier principal
poster_final.pdf (606.02 Ko)
Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Origine : Fichiers produits par l'(les) auteur(s)