Structural Health Monitoring

A series of Fiber Optic Sensors (FOSs) and its measurement systems with multi-parameters have been developed and applied for Structural Health Monitoring (SHM) of composite materials and structures. These FOSs can measure strain, temperature, and acoustic emission. It can also be used for monitoring the processes of manufacturing composites. The measure systems based on TDM technology realize multi-channels measure for Fiber Bragg Grating (FBG). Various kinds of FOSs have been applied for the research of manufacturing composites and the residual strain regulation which propose a novel monitoring method for residual strain from the structure.

(a) The fiber optic acoustic emission sensor is applied for real-time monitoring of composite materials and structure's damage and identification. Research achievements supply important polytechnic design parameters of composite materials and structures and monitoring and control technology for applications in departments such as aviation, aerospace, etc.

(b) The Fiber Bragg Grating (FBG) sensor is applied for deformation monitoring of flexible variable camber wing and two-dimensional shape deformation of a shape memory polymer plate as a vector bending sensor.

Fig.1 A flexible variable camber wing model with four FBG sensors

Fig. 2 Smart wind turbine blade static load test set-up