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- W2992415715 abstract "A modified intensity demodulation method for fiber optic Fabry–Perot cavity and fiber Bragg grating combined sensing system is proposed, through which the cross-sensing error can be reduced effectively and high sensing speed can be realized at the same time. The system is based on an Extrinsic Fabry–Perot Interferometer for strain sensing, and a fiber Bragg grating for temperature sensing. Three-wavelength digital phase demodulation method and passive linear filtering demodulation method are adopted for the demodulation of F–P cavity length and fiber Bragg grating central wavelength, respectively. Meanwhile temperature varied from 25 °C to 105 °C under constant pressure, the demodulation accuracy of strain after correction is ±0.6μ ε, which is improved by 2 times than the direct demodulation result. The demodulation accuracy of temperature is 1.4 °C after correction, with pressure ranging from 0 to 10 MPa at constant temperature. Temperature demodulation error is decreased to 1/3 of its original value. Strain sensing accuracy after correction was ±1μ ε. Experimental studies show that the proposed sensing system has a more compact size and higher measurement accuracy than the previous ones." @default.
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- W2992415715 date "2020-03-01" @default.
- W2992415715 modified "2023-10-17" @default.
- W2992415715 title "A novel method for simultaneous measurement of temperature and strain based on EFPI/FBG" @default.
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- W2992415715 doi "https://doi.org/10.1016/j.optcom.2019.125020" @default.
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