Title :
A novel liquid level monitoring sensor system using a fiber Bragg grating
Author :
Lingtao Meng ; Yunqi Liu ; Tingyun Wang
Author_Institution :
Sch. of Commun. & Inf. Eng., Shanghai Univ., Shanghai, China
Abstract :
A fiber optic liquid level sensor based on the strain sensing by a fiber Bragg grating (FBG) is proposed and demonstrated. The FBG packaged on a thin cantilever beam so that the elongation and contraction of the FBG indicate a liquid level change. The strain response of FBG has been carried out and the shift in the Bragg wavelength shows a very good linearity during rise and fall of liquid level. The sensitivity is approximately 17.8 pm/cm for a liquid level variation of 30 cm. The liquid level monitoring system achieve good reversibility and repeatability. Three kinds of demodulating methods are adopted to detect the wavelength shift.
Keywords :
Bragg gratings; cantilevers; elongation; fibre optic sensors; level measurement; monitoring; strain measurement; strain sensors; Bragg wavelength shift; FBG; contraction; demodulating method; distance 30 cm; elongation; fiber Bragg grating sensor; fiber optic liquid level sensor; liquid level monitoring sensor system; strain sensing; thin cantilever beam; Cantilever Beam; Fiber Bragg Grating; Float; Liquid Level Sensor;
Conference_Titel :
Smart and Sustainable City 2013 (ICSSC 2013), IET International Conference on
Conference_Location :
Shanghai
Electronic_ISBN :
978-1-84919-707-6
DOI :
10.1049/cp.2013.1965
