Acta Photonica Sinica, Volume. 50, Issue 9, 0906002(2021)
Study on Strain Transfer Mechanism of Three Dimensions Printing Encapsulated Fiber Bragg Grating Sensor
Figures & Tables(23)
Fig. 1. Design drawing of 3D-printing fiber grating strain sensor with clamped
Fig. 2. The physical of 3D-printing fiber grating strain sensor with clamped
Fig. 3. Analysis of the forces on the micro elements symmetric with the
Fig. 4. The deformation coordination condition of each part of the microelement which is symmetric with the
Fig. 5. Effect of elastic modulus of 3D-printing on strain transmissibility
Fig. 6. Effect of 3D-printing layer thickness on strain transmissibility
Fig. 8. Effect of the elastic modulus of 3D-printing packaging layer on the average strain transmissibility
Fig. 9. Effect of encapsulation layer thickness on average strain transmissibility
Fig. 10. Effect of fiber bond length on average strain transmissibility
Fig. 11. Calibration test and 3D-printing fiber grating strain sensor with clamped
Fig. 13. Three times load test of 3D-printing fiber grating strain sensor
Fig. 14. Three times unload test of 3D-printing fiber grating strain sensor
Table 1. 3D-printing fiber Bragg grating strain sensor dimensions
View tableView in ArticleTable 1. 3D-printing fiber Bragg grating strain sensor dimensions
Parameter type Dimension parameters/mm Gauge length 70 Length of the grating 25 Length of reserved hole in grating area 30 Diameter of reserved hole in grating area 2 Length of adhesive section 20 Sensor diameter 5 Diameter of hole reserved for loose casing 2 Depth of hole reserved for loose casing 3 Inside diameter of capillary tube 0.4 Outer diameter of capillary tube 0.5
Table 2. Physical and mechanical parameters of optical fiber and 3D-printing protective layer
View tableView in ArticleTable 2. Physical and mechanical parameters of optical fiber and 3D-printing protective layer
Parameter Unit Symbol Value Elastic modulus of optical fiber MPa Eg 7.2×104 Elastic modulus of 3D-printing layer MPa Ep 4 000 Poisson's ratio of 3D-printing layer μ 0.394 Radius of optical fiber μm Rg 62.5 3D-printing layer thickness mm rm 2.5 Bond length of optical fiber mm L 30
Table 3. Average strain transmissibility of elastic modulus of different 3D-printing packaging layers
View tableView in ArticleTable 3. Average strain transmissibility of elastic modulus of different 3D-printing packaging layers
Elastic modulus/MPa 300 400 500 600 700 800 900 1 000 1 100 Mean strain transmissibility/% 92.73 94.55 95.64 96.37 96.89 97.28 97.58 97.82 98.02
Table 4. Average strain transmissibility of different 3D-printing encapsulation thickness
View tableView in ArticleTable 4. Average strain transmissibility of different 3D-printing encapsulation thickness
Package thickness/mm 1 2 3 4 5 6 7 8 9 Mean strain transmissibility/% 92.734 92.730 92.723 92.716 92.708 92.700 92.692 92.685 92.678
Table 5. Average strain transmissibility of different fiber bond lengths
View tableView in ArticleTable 5. Average strain transmissibility of different fiber bond lengths
Parameter Value Bond length of optical fiber/mm 5 10 15 20 25 30 35 40 45 Mean strain transmissibility/% 35.81 74.88 84.62 88.84 91.19 92.70 93.76 94.55 95.15
Table 6. Sensing characteristics of 3D-printing fiber Bragg grating strain sensor
View tableView in ArticleTable 6. Sensing characteristics of 3D-printing fiber Bragg grating strain sensor
Sensor parameter The original wavelength/mm Calibration experiment wavelength
formula
Sensor sensitivity coefficient
PLA-5 mm 1 555.525 5.00
Table 7. Linearity of 3D-printing fiber grating strain sensor
View tableView in ArticleTable 7. Linearity of 3D-printing fiber grating strain sensor
Sensor parameter Strain of steel plate Wavelength/nm Fitting wavelength/nm Absolute value of deviation/nm PLA-5 mm 142.857 1 563.661 1 563.657 0.003 214.286 1 563.685 1 563.686 0.001 285.714 1 563.708 1 563.714 0.006 357.143 1 563.734 1 563.743 0.009 428.571 1 563.759 1 563.771 0.013 500.000 1 563.785 1 563.800 0.015 571.429 1 563.818 1 563.829 0.010 642.857 1 563.845 1 563.857 0.012 714.286 1 563.879 1 563.886 0.007 785.714 1 563.909 1 563.914 0.005 857.143 1 563.939 1 563.943 0.004
Table 8. Hysteresis of 3D-printing fiber Bragg grating strain sensor
View tableView in ArticleTable 8. Hysteresis of 3D-printing fiber Bragg grating strain sensor
Sensor parameter Strain of steel plate Loaded wavelength/nm Unloading wavelength/m Absolute value of deviation/nm PLA-5 mm 142.857 1 563.661 1 563.659 0.002 214.286 1 563.685 1 563.683 0.002 285.714 1 563.708 1 563.712 0.005 357.143 1 563.734 1 563.740 0.006 428.571 1 563.759 1 563.763 0.004 500.000 1 563.785 1 563.789 0.004 571.429 1 563.818 1 563.818 0.000 642.857 1 563.845 1 563.851 0.006 714.286 1 563.879 1 563.882 0.003 785.714 1 563.909 1 563.906 0.004 857.143 1 563.939 1 563.939 0.000
Table 9. Repeatability of 3D-printing fiber Bragg grating strain sensor
View tableView in ArticleTable 9. Repeatability of 3D-printing fiber Bragg grating strain sensor
Sensor parameter Loading situation Wavelength/nm The average wavelength/nm Absolute value of deviation/nm Data standard deviation/nm PLA-5 mm Cycle 1 upload 1 563.708 1 563.710 0.002 4 0.005 4 Cycle 1 download 1 563.712 0.001 6 Cycle 2 upload 1 563.710 0.000 4 Cycle 2 download 1 563.710 0.000 4 Cycle 3 upload 1 563.714 0.003 6 Cycle 3 download 1 563.709 0.001 4
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Li SUN, Xinxin SUN, Tianqi LIANG, Chuang LI, Chunwei ZHANG. Study on Strain Transfer Mechanism of Three Dimensions Printing Encapsulated Fiber Bragg Grating Sensor[J]. Acta Photonica Sinica, 2021, 50(9): 0906002
Paper Information
Category: Fiber Optics and Optical Communications
Received: Feb. 3, 2021
Accepted: Apr. 9, 2021
Published Online: Oct. 22, 2021
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