科研成果详情

A visual detection method is proposed in this paper to identify cracks in a cantilever beam crack. The method takes full advantages of high spatial resolution of image sensing, relying only on cost-effective ordinary frame rate camera to record the process of free vibration of the cantilever beam, and combines with singular value decomposition method to obtain the vibration mode shapes of the cantilever beam. Then modal shape differences from baseline are taken as the features for detection and diagnosis The effectiveness of the first-order vibration mode shape difference in cantilever beam crack size and location detection is verified by both simulation and experiment.