Title :
Multi-sensor system based on phase detection, an LED array, and luminophore-doped xerogels
Author :
Chodavarapu, V.P. ; Bukowski, R.M. ; Kim, S.J. ; Titus, A.H. ; Cartwright, A.N. ; Bright, F.V.
Author_Institution :
Dept. of Electr. Eng., Univ. Buffalo, NY, USA
Abstract :
An optical multi-sensor system based on the excited-state lifetime of luminophore doped xerogels is described. The system is based on the novel concept of combining addressable surface-mount light-emitting diode (SM-LED) arrays with doped xerogel thin films; each SM-LED in the array is coated with a different xerogel-based sensor element. Each sensor element exhibits a unique response profile to the target analyte. A prototype system with a 2×2 LED array is presented, with three of the LEDs coated with xerogel-based sensing layers, each layer having a different sensitivity and response profile to oxygen (O2).
Keywords :
fibre optic sensors; gas sensors; light emitting diodes; sensor fusion; LED array; O2; doped xerogel thin films; excited-state lifetime; luminophore-doped xerogels; optical multisensor system; phase detection; response profile; surface-mount light-emitting diode arrays; target analyte; xerogel-based sensor element;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20052142