15 October 2012 Self-compensating fiber optic flow sensor based on dual fiber Bragg gratings
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Abstract
We present a novel fiber optic flow sensor system by using two fiber Bragg gratings (FBGs) and a cantilever beam structure in this paper. This fiber optic flow sensor uses two FBGs that are bonded on both sides of a cantilever beam to measure the flow rate by monitoring the FBG wavelength changes caused by the bending of the cantilever beam. Cross sensitivity of the temperature dependence of the sensor can be compensated automatically. We fabricate the FBG flow sensor and test it in the laboratory-scaled flow set-up. The testing results demonstrate its high resolution and repeatability for the fluid flow rate measurements. Based on the analysis of test results, the fiber optic flow system will be optimized in the materials of the cantilever beam and the process of sensor fabrication, so as to finally be used in the oil field.
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Wenjuan Yao, Wenjuan Yao, Wei Peng, Wei Peng, Xinpu Zhang, Xinpu Zhang, Xinlei Zhou, Xinlei Zhou, Yun Liu, Yun Liu, } "Self-compensating fiber optic flow sensor based on dual fiber Bragg gratings", Proc. SPIE 8418, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Smart Structures, Micro- and Nano-Optical Devices, and Systems, 84181U (15 October 2012); doi: 10.1117/12.975926; https://doi.org/10.1117/12.975926
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