Fig. 1. Principle of the FBG sensor

Fig. 2. AM material with anisotropy. (a) Microstructural detail; (b) continuum model

Fig. 3. Structure of the FBG pressure sensor

Fig. 4. Preparation process of the FBG pressure sensor

Fig. 5. FBG pressure sensor based on AM technology

Fig. 6. FBG center wavelength change curve with time during printing

Fig. 7. Equipment of the calibration test system

Fig. 8. Pressure sensor wavelength change curve with time during the calibration process. (a) 200 kPa; (b) 400 kPa; (c) 600 kPa; (d) 800 kPa

Fig. 9. Relationship between wavelength and loading pressure of the FBG pressure sensor

Fig. 10. Model of the experimental loading system

Fig. 11. Pressure change curves measured by two pressure sensor with time