High sensitivity optical fiber pressure sensor based on thin-walled oval cylinder

The diagram of pressure calibration system The pressure calibration system was built for the pressure characteristic acquisition, as illustrated in Fig. 7. The system concludes a piston pressure sensor (GJM-6, precision 0.01 in 0.1 ∼ 6 MPa), an interrogator and a laptop. The piston pressure sensor i...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2020-08, Vol.310, p.112042, Article 112042
Main Authors: Hong-kun, Zheng, Yong, Zhao, Qiang, Zhao, Ri-qing, Lv
Format: Article
Language:English
Subjects:
Bourdon tubes
Bragg gratings
Crosstalk
Cylinders
Deformation
FBG
Fiber optics
Finite element analysis
Finite element method
High sensitivity
Optical fiber sensing
Optical fibers
Pressure
Pressure measurement
Pressure sensing
Pressure sensors
Sensors
Thin-Walled oval cylinder
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Summary:The diagram of pressure calibration system The pressure calibration system was built for the pressure characteristic acquisition, as illustrated in Fig. 7. The system concludes a piston pressure sensor (GJM-6, precision 0.01 in 0.1 ∼ 6 MPa), an interrogator and a laptop. The piston pressure sensor is applied as a pressure standard. [Display omitted] •An optical fiber pressure sensor based on thin-walled oval cylinder was studied and demonstrated.•A pair of fiber Bragg gratings are fixed on the outer wall of the oval cylinder to sense the deformation.•The experiments show that the pressure accuracy is 0.012 MPa.•The sensor could be applied to some occasions for small scale of high sensitivity. In this study, an optical fiber pressure sensor based on a thin-walled oval cylinder is proposed. To sense the degree of deformation, a pair of fiber Bragg gratings (FBGs) are fixed on the outer wall of the oval cylinder. A finite element analysis is performed to analyze the sensing characteristic of the sensor. The temperature cross-sensitivity is determined using an elimination method. The experiment results show that the pressure sensitivity is 1.198 nm/MPa within a range of 0–1 MPa, with a precision of 0.011 MPa. The proposed sensor combines the advantages of a thin-walled cylinder and a bourdon tube, which realizes pressure measurement with high sensitivity and low crosstalk. The sensor can be applied to specific urban pipeline pressure monitoring.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2020.112042