Optics and Precision Engineering, Volume. 29, Issue 10, 2306(2021)
Double-layer orthogonal fiber Bragg gratings flexible shape sensing technology
Figures & Tables(10)
Fig. 2. Schematic diagram of structure and sensing principle for FBG
Fig. 4. Schematic diagram of optical fiber simulated bending curve
Fig. 5. Flexible shape sensor and curvature calibration experimental equipment
Fig. 6. Strain response of flexible shape sensor to different curvatures
Fig. 7. Sensitivity response of flexible shape sensor to bending curvatures
Fig. 8. Test surfaces and 3D reconstruction graphics of constant curvature surfaces
Table 1. Numbers of fiber implanted in upper and lower arrays and initial value of FBG center wavelength
View tableView in ArticleTable 1. Numbers of fiber implanted in upper and lower arrays and initial value of FBG center wavelength
Upper FBG array Lower FBG array Fiber 1 Fiber 2 Fiber 3 Fiber 4 Fiber 5 Fiber 6 Fiber 7 Fiber 8 1 533.834 1 545.640 1 557.901 1 569.819 1 533.866 1 545.851 1 557.759 1 569.677 1 536.807 1 548.792 1 560.755 1 572.662 1 536.805 1 548.854 1 561.003 1 572.630 1 539.891 1 551.856 1 563.706 1 575.856 1 539.901 1 551.808 1 563.599 1 575.762 1 542.831 1 554.838 1 566.660 1 578.839 1 543.009 1 554.906 1 566.841 1 578.831
Table 2. Definition of all variables in Figure 4
View tableView in ArticleTable 2. Definition of all variables in Figure 4
Variable Name θA Central angle of arc OA θB Central angle of arc AB θD Central angle of arc CD θ1 Rotation angle of coordinate system XAAZA relative to coordinate system X1AZ1 θ2 Included angle of the line segment BC relative to the Z2 axis in the coordinate system X2AZ2 θ3 Rotation angle of coordinate system XCCZC relative to coordinate system X3AZ3 OA
OB
OD
The center of the circle corresponding to arc OA
The center of the circle corresponding to arc AB
The center of the circle corresponding to arc CD
rA Curvature radius of arc OA rB Curvature radius of arc AB rD Curvature radius of arc CD xBA The abscissa of point B in the coordinate system XAA ZA zBA The ordinate of point B in the coordinate system XAA ZA LBC Length of line segment BC xDC The abscissa of point D in the coordinate system XCCZC zDC The ordinate of point D in the coordinate system XCCZC
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Yong-xing GUO, Yue-hui YANG, Li XIONG. Double-layer orthogonal fiber Bragg gratings flexible shape sensing technology[J]. Optics and Precision Engineering, 2021, 29(10): 2306
Paper Information
Category: Modern Applied Optics
Received: Apr. 10, 2021
Accepted: --
Published Online: Nov. 23, 2021
The Author Email: GUO Yong-xing (yongxing_guo@wust.edu.cn)
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