Bandwidth modulation and centre wavelength shift of a single FBG for simultaneous water level and temperature sensing
A diaphragm-based hydrostatic level transducer with the use of a single Fibre Bragg grating (FBG) is presented for simultaneous measurement of water level and temperature. In order to distinguish the mismatch between water level and temperature sensitivity, a bandwidth modulation and centre waveleng...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier Ltd
2020
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/28446/1/Bandwidth%20modulation%20and%20centre%20wavelength1.pdf http://umpir.ump.edu.my/id/eprint/28446/ https://doi.org/10.1016/j.measurement.2020.107955 https://doi.org/10.1016/j.measurement.2020.107955 |
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| Summary: | A diaphragm-based hydrostatic level transducer with the use of a single Fibre Bragg grating (FBG) is presented for simultaneous measurement of water level and temperature. In order to distinguish the mismatch between water level and temperature sensitivity, a bandwidth modulation and centre wavelength shift measurement technique was introduced. The change in bandwidth is sensitive towards water level variations with a sensitivity of 0.0015 nm/cm. Meanwhile, the change of centre wavelength is sensitive towards water level and temperature variations, with sensitivities of 0.0008 nm/cm and 0.0365 nm/°C, respectively. By expressing the obtained sensitivities in a matrix equation approach, simultaneous water level and temperature measurement can be predicted accurately. |
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