Fig. 1. Schematic of matched filtering demodulation method

Fig. 2. Reflection-type matching filtering simulation

Fig. 3. Schematic diagram of longitudinal section of bare optical fiber affixed to surface

Fig. 4. Shear force transfer diagram of each layer microelement segment

Fig. 5. Schematic diagram of cross section of bare optical fiber affixed to surface

Fig. 6. Relation between strain transfer rate and various influencing factors

Fig. 7. Strain transfer rate and FBG central wavelength drift after actual bonding

Fig. 8. Experimental system diagram

Fig. 9. Experimental system construction

Fig. 10. Signal comparison before and after Butterworth low-pass filtering

Fig. 11. Hilbert peak-finding and center wavelength calibration