8 September 2016 Numerical and experimental studies of high-sensitivity plug-in pressure sensor based on fiber Bragg gratings
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Abstract
A high-sensitivity pressure sensor based on wavelength detection technology of fiber Bragg grating (FBG) is proposed in this paper. The FBG pressure sensor can be used to measure downhole pressure of oil and gas wells. An eccentric-pushrod structure is used to improve the sensitivity of the sensor. The effect of adhesive on elastic hysteresis of the sensor is analyzed, and the adhesive with large shear modulus is used to reduce the hysteresis of the sensor. Numerical and experimental results show that this sensor possesses good linearity and repeatability, as well as little elastic hysteresis. The sensitivity of the sensor can reach 230.9  pm/MPa when the measured pressure is in the range of 0 to 20 MPa.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Hongtao Zhang, Hongtao Zhang, Wenping Song, Wenping Song, Zhenlong Wang, Zhenlong Wang, Bin Guo, Bin Guo, Guangyu Zhang, Guangyu Zhang, LiLi Liu, LiLi Liu, } "Numerical and experimental studies of high-sensitivity plug-in pressure sensor based on fiber Bragg gratings," Optical Engineering 55(9), 096104 (8 September 2016). https://doi.org/10.1117/1.OE.55.9.096104 . Submission:
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