Tóm tắt:

This study presents an experimental investigation on sensor fault diagnosis for piezoelectric interface-based SHM. Firstly, an impedance monitoring method via the smart piezoelectric interface is introduced. Secondly, experiments are conducted on a steel bolted connection to investigate the effect of sensor defects on impedance responses. Finally, an impedance feature is extracted and used to diagnose and differentiate the sensor defects from the structural damages.