Zhihui Luo, Xiaolong Wang, Yonghui Liang, Xinjia Yu, Jianglou Huang. Migration Monitoring Method for Ancient Building Based on Ultra-Weak Fiber Bragg Grating[J]. Laser & Optoelectronics Progress, 2025, 62(3): 0306005
- Laser & Optoelectronics Progress
- Vol. 62, Issue 3, 0306005 (2025)
Fig. 1. Optical cable strain transfer model
Fig. 2. Simulated structural meshing
Fig. 3. Path strain at different locations. (a) Central strain; (b) outer strain
Fig. 4. Schematic diagram of strain-curvature relationship
Fig. 5. Recursive principle of corner cutting
Fig. 6. Structure of steel strand UW-FBG strain optical cable
Fig. 7. Strain calibration curve of UW-FBG. (a) Wavelength of 1554 nm; (b) wavelength of 1542 nm; (c) wavelength of 1530 nm
Fig. 8. Temperature calibration curve of UW-FBG
Fig. 9. Layout diagram of sensor cable
Fig. 10. Migration process monitoring system
Fig. 11. Strain monitoring curves of pallet beam after concrete pouring. (a) Variation in strain in concrete curing process; (b) wavelength change after concrete complete curing
Fig. 12. Strain distribution before, during and after translation of pallet beam
Fig. 13. Nonuniform settlement of pellet beam during moving process
Fig. 14. Nonuniform settlement of pallet beam after moving
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Table 1. Structural parameters of each layer
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Table 2. Average strains at different locations under different pulling forces
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