Detection of ice-melting from ice bottom interface based on transmissive fiber optic sensor

A detection method of ice bottom interface melting based on a transmissive fiber optic sensor has been proposed for the wind turbine blade de-icing system. A glass fiber reinforced composite sheet with an implanted transmissive fiber optic sensor was stacked on top of laminates having a polymer electric heating film, and then hot pressed together to form a heating film heating icing de-icing experimental system. A heating mode with a heating power density of 700 W/m² was used to heat and de-ice a low-temperature icing board at -15°C, while monitoring the optical power changes of the transmissive fiber optic sensor. The experimental results show that when heated for 1 minute, the optical power of the transmissive fiber optic sensor changes significantly, effectively characterizing the melting state of the ice bottom.