Laser & Optoelectronics Progress, Volume. 59, Issue 1, 0106006(2022)
Design and Research on Variable Cross-section Cantilever Fiber Bragg Grating Pressure Sensor
Figures & Tables(11)
Fig. 2. Stress diagram of cantilever beam with constant section and variable section. (a) Constant cross-section cantilever beam; (b) variable cross-section cantilever beam
Fig. 4. Free end offset of cantilever beam with different thickness increasing with free end thickness
Fig. 5. Free end offset nephogram of 0.25 mm cantilever beam under 1 MPa pressure
Fig. 6. Finite element analysis of cantilever beam structure. (a) Variable cross-section beam structure; (b) constant cross-section beam structure
Fig. 7. Relationship between sensitivity and parameters of different structures and materials. (a) Effective length of fiber Bragg grating; (b) Poisson's ratio; (c) elastic modulus; (d) radius of dowel; (e) radius of diaphragm; (f) length from fixed end to stressed point; (g) diaphragm thickness
Fig. 8. Comparison of influence curves of material parameters on sensitivity between numerical analysis and finite element analysis. (a) Radius of diaphragm; (b) diaphragm thickness
Fig. 9. Comparison of force and wavelength fitting curves of different structures
Table 1. Structure and material parameters of FBG sensor
View tableTable 1. Structure and material parameters of FBG sensor
Name Symbol Value Radius of diaphragm R 6 mm Diaphragm thickness h 0.5 mm Elastic modulus of diaphragm E1 1.93×1011 Pa Poisson’s ratio of diaphragm μ 0.31 Radius of dowel bar r 1 mm Cantilever beam width b 4 mm Elastic modulus of cantilever beam E1 1.93×1011 Pa Length of constant section cantilever beam Ld 10 mm Length from fixed end of constant section cantilever beam to stress point ld 5 mm Length of variable section cantilever beam Lb 10 mm Length from fixed end of variable section cantilever beam to stress point lb 5 mm Effective length of fiber grating x 15 mm Cross sectional area of fiber grating S 2 mm2 Elastic modulus of fiber grating E2 3.15×105 Pa FBG1 Central wavelength λB1 1550 nm FBG2 Central wavelength λB2 1550 nm
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Yue Pan, Jiajia Song, Zhichong Wang, Chunyong Sun, Chuan Gan. Design and Research on Variable Cross-section Cantilever Fiber Bragg Grating Pressure Sensor[J]. Laser & Optoelectronics Progress, 2022, 59(1): 0106006
Paper Information
Category: Fiber Optics and Optical Communications
Received: Apr. 13, 2021
Accepted: Apr. 28, 2021
Published Online: Dec. 23, 2021
The Author Email: Jiajia Song (s15633966642@163.com)
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