HINDAWI – Journal of sensors
2016
An Optimized Method Based on Digitalized Lissajous Curve to Determine Lifetime of Luminescent Materials on Optical Fiber Sensors
ADRIÁN RIDRUEJO; NEREA DE ACHA; CÉSAR ELOSÚA; IGNACIO R. MATÍAS; FRANCISCO J. ARREGUI
Abstract
A method is proposed to determine lifetime of luminescent emissions based on the phase shift measurement employing the digitalized Lissajous representation: this diagram has been typically used with analogical algorithms, whereas the proposed method is performed in digital domain, showing an improved accuracy and repeatability. The procedure is studied and tested with two different oxygen sensors that show different sensitivities and signal levels in order to confirm the no influence of the signals intensity on the calibration process. The computational cost of the proposed method is low, which makes it possible to monitor in real time luminescence sensors based on reversible quenching with a potential low cost system based on a digital signal processor (DSP).
Link to source: https://www.hindawi.com/journals/js/2016/6019439/
Sensors Construction Process
… The immersion into the different solutions was controlled by a programmable robotic arm obtained from Nadetech Innovations S.L. This process was repeated until 40 bilayers were built. The probe prepared in this way was called Sensor B.