Title :
Optical Fibre Bending Sensor With Automatic Intensity Compensation
Author :
Zawawi, Mohd Anwar ; O´Keeffe, Sinead ; Lewis, Elfed
Author_Institution :
Opt. Fibre Sensors Res. Centre, Univ. of Limerick, Limerick, Ireland
Abstract :
An extrinsic optical fibre bending sensor based on intensity modulation technique aimed for physiological application is presented. This sensing technique is capable of measuring the bending angle continuously in flexion, extension and lateral movements. The sensor working range is between -22° and 22° with 0.4° accuracy and 0.1° resolution. From the theoretical estimation, the bending sensor automatically compensates for variation in the source intensity and various losses in the input and output fibres. The experimental results obtained in this investigation verified the theoretical finding. Among the advantages of the this optical bending sensor are being noninvasive, suitable for continuous measurement and immune from electromagnetic effects.
Keywords :
bending; fibre optic sensors; intensity modulation; optical fibre losses; optical fibre testing; optical modulation; bending angle measurement; electromagnetic effects; extension movements; extrinsic optical fibre bending sensor; flexion movements; intensity modulation technique; lateral movements; optical losses; physiological application; Estimation; Light emitting diodes; Optical fiber sensors; Optical fibers; Probes; Sensitivity; Temperature sensors; Bending sensor; Bending sensor,; health monitoring; intensity-modulation sensor; intensitymodulation sensor; optical fibre sensor;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2378754
