Mechanical structural damage detection based on distributed measurement

Abstract

The distributed detection methods for mechanical structural damage have been researched in these years, but there are some key problems existing in operations such as complex calculation, a lot of testing points. Aiming at the existing shortcomings of the distributed mechanical structural damage detection, this paper puts forward a new method by using distributed Fiber Bragg grating (FBG) sensors combining an interpolation algorithm, and predicts damage region through the limited testing points to avoid the deficiency caused by a large number of detection points. On this basis, taking the thin steel plate with four fixed comers as the object of study, the experiment system is set up using some FBG sensors, and its results verify the feasibility of the method with the interpolation algorithm.