Title :
A real time fiber optic micro displacement level sensor
Author :
Sengupta, D. ; Shankar, M. Sai ; Reddy, P. Saidi ; SaiPrasad, R.L.N. ; Narayana, K.S. ; Kishore, P.
Author_Institution :
Dept. of Phys., Nat. Inst. of Technol., Waranagal, India
fDate :
Nov. 28 2011-Dec. 1 2011
Abstract :
Detection of micro change in liquid level using PMMA fiber in real time is demonstrated in this article. This sensor operates on light intensity modulation and such modulation results due to displacement of a floating reflector. The sensor system consists of light source, encapsulated PMMA fiber, floating reflector, photo detector, transimpedence amplifier, multimeter and a data acquisition system for the static and dynamic measurement. A change of 0.0073V at the output of the transimpedence amplifier was observed for 1 μm change in level. high sensitivity, good linearity, simple design and low cost make this sensor suitable for industry.
Keywords :
amplifiers; data acquisition; fibre optic sensors; intensity modulation; level measurement; light sources; micro-optomechanical devices; microsensors; optical design techniques; optical elements; optical modulation; optical polymers; photodetectors; polymer fibres; data acquisition system; dynamic measurement; encapsulated PMMA fiber; floating reflector; intensity modulation; light source; microdisplacement level sensor; multimeter system; photodetector; real time fiber optic sensor; sensor design; static measurement; transimpedence amplifier; Data acquisition; Level measurement; Optical fiber amplifiers; Optical fiber sensors; Plastics; Level sensor; Micro displacement; PMMA fiber; Reflector;
Conference_Titel :
Sensing Technology (ICST), 2011 Fifth International Conference on
Conference_Location :
Palmerston North
Print_ISBN :
978-1-4577-0168-9
DOI :
10.1109/ICSensT.2011.6136998
