Design of Impedance Spectroscopy Based Structural Health Monitoring Sensors for Fatigue Damage Detection in Aluminum Beams

摘要

Piezoelectric sensors have been previously used for continuous structural health monitoring using impedance spectroscopy. However, three important issues still remain to be investigated for efficient design of such sensors, namely (i) the effect of sensor geometry on sensitivity of impedance based damage detection, (ii) the selection of frequency band for continuous health monitoring, and (Hi) identification of damage quantification metric.