Aviation fuel gauging sensor utilizing multiple diaphragm sensors incorporating polymer optical fiber Bragg gratings
; Pospori, A.
; Saez-Rodriguez, D.
; Nielsen, K.
; Bang, O.
; Webb, D. J.
IEEE Sensors Journal Vol. 16, Nº 15, pp. 6122 - 6129, August, 2016.
ISSN (print): 1530-437X
Journal Impact Factor: 1,762 (in 2014)
Digital Object Identifier: 10.1109/JSEN.2016.2577782
A high performance fuel gauging sensor is described that uses five diaphragm-based pressure sensors, which are monitored using a linear array of polymer optical fiber Bragg gratings. The sensors were initially characterized using water, revealing a sensitivity of 98 pm/cm for four of the sensors and 86 pm/cm for the fifth. The discrepancy in the sensitivity of the fifth sensor has been explained as being a result of the annealing of the other four sensors. Initial testing in JET A-1 aviation fuel revealed the unsuitability of silicone rubber diaphragms for prolonged usage in fuel. A second set of sensors manufactured with a polyurethane based diaphragm showed no measurable deterioration over a 3 month period immersed in fuel. These sensors exhibited a sensitivity of 39 pm/cm, which is less than the silicone rubber devices due to the stiffer nature of the polyurethane material used.