Abstract: A large-scale flexible test prototype system is built for surface vibration according to the vibrating of the solar array in space. The system provides an intelligent test method for flexible surface based on the embedded sensors and non-visualization. The fiber bragg grating (FBG) sensors are packaged onto the shape memory alloy slims by pro-load strength and embedded into the surface according to the technology of spatial-division-multiplexing (SDM) and wavelength-division-multiplexing (WDM). The sensors interrogator distinguished the wavelength shifts that could be turned into the curvature of the curve in the surface. The surface was reconstructed based on the curvature and the arc-length and displayed. The experiment shows that the detecting sensitivity of FBG sensors network of the detecting system is high the reconstruction algorithm is fast, and the precision of reconstructed surface is high. The system can be used in the safety inspection and monitoring of large flexible surfaces.

Key words: Curvature, Flexible surface, Intelligent test, Sensors network, Surface reconstruction