Underwater vector flow velocity sensor based on fiber Bragg gratings

Aiming at the problems of the high cost, poor real-time performance, and the inability to perform vector flow velocity detection of current flow velocity sensors, this paper proposes a vector flow velocity sensor based on wavelength-division multiplexing of fiber Bragg gratings (FBGs) embedded in the flexible films. Using the small size, low cost, high sensitivity of FBG, and the elasticity, waterproofness, and corrosion resistance of flexible materials, this sensor effectively achieve rapid measurement of underwater vector flow velocities. It demonstrates great potential in applications such as marine environment monitoring, underwater auxiliary navigation, and underwater robotics.