Abstract: This paper introduces a kind of built-in fiber Bragg grating (FBG) sensor module of composite mould. Firstly, the linear strain sensitivity of the sensor module is calibrated under the vertical concentrated static pressure. By analyzing the modal buckling of the sensor module, the service stability of the sensor module under the built-in condition is determined. After that, the module is applied to the mould surface monitoring process of large-scale wind turbine blades. In the process of adjusting the mould surface, the deflection displacement vector collected by the laser tracker is compared with the vertical component strain obtained by the sensor module, and finally the performance of the module is verified to meet the practical application feasibility.

Key words: composite materials mould, FBG Sensor module, profile stress-strain monitoring