Fig. 1. Schematic diagram of fiber Bragg grating

Fig. 2. Mold and flow channel

Fig. 3. Mold fabricated with PMMA

Fig. 4. Machining process of blood vessel model in vitro

Fig. 5. Schematic diagram of blood vessel model

Fig. 6. Diagram of stress results at optical fiber

Fig. 7. Linear relationship of stress-velocity

Fig. 8. Diagram of simulation results

Fig. 9. Package structure diagram of blood vessel model in vitro and fiber Bragg grating

Fig. 10. Diagram of experimental device

Fig. 11. Reflectance spectrum diagram of fiber Bragg grating

Fig. 12. Relation diagram of experimental results

Fig. 13. Comparison of simulated and experimental strain values at different flow rates