FBG Water-Level Transducer Based on PVC-Cantilever and Rubber-Diaphragm Structure
Document Type
Article
Publication Date
1-1-2019
Abstract
The use of FBG sensors in water level monitoring has shown great advantages over the use of conventional electrical sensors. However, much effort is still required to increase their sensitivity towards water level measurement with eliminated sensitivity towards temperature. Here, the FBG was bonded on a PVC polymer plastic cantilever beam and rubber diaphragm structure. The sensing mechanism was based on the differential FBG method. Variations of the water level from 0 to 100 cm obtained the sensitivity of 0.0639 nm/cm with the linearity of 98.06%. The poor linearity was mainly due to the manual fabrication errors. However, this uncertainty can be overcome through the polynomial regression fit in determining the water level measurement. The measured water level was closed to the actual water level at a tolerance of ±2 cm. For temperature effects, the sensitivity was inconspicuous, recorded at only 0.0003 nm/°C across the range of 10 °C to 60 °C. © 2001-2012 IEEE.
Keywords
Fiber Bragg grating (FBG), temperature compensation, water level
Divisions
photonics
Publication Title
IEEE Sensors Journal
Volume
19
Issue
17
Publisher
Institute of Electrical and Electronics Engineers (IEEE)