Journal of Physics: Conference Series | 2021
Structural crack localization and identification based on FBG
Abstract
The current structural crack detection still suffers from the problems of single detection target, inability to achieve true acoustic emission crack signal separation, and poor portability of the sensing system. To address this phenomenon, in this paper, based on the use of fast blind source signal separation, combined with the designed structural crack sensing detection model, we will first coarsely localize the crack location area, and within this area, we will use the designed structural multi-crack parameter identification algorithm to achieve the multi-crack location identification purpose. The experimental results show that the proposed method achieves an average localization accuracy of 1.95 cm and a localization time delay of about 25 ms. It provides a feasible method for structural crack detection.