Experiment study on structure health monitoring with high-order resonant circuit

Wanlu Zhou; You Wu; Lei Zuo

doi:10.1117/12.2009920

17 April 2013 Experiment study on structure health monitoring with high-order resonant circuit

Wanlu Zhou, You Wu, Lei Zuo

Proceedings Volume 8695, Health Monitoring of Structural and Biological Systems 2013; 86951O (2013) https://doi.org/10.1117/12.2009920
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

Making the use of the electromechanical characteristics of piezoelectric, admittance-based structure health monitoring method is an effective method to detect damages. The experiment study on the admittance-based damage detection method with high-order resonant circuit is presented in this paper, including comparisons with first-order resistive circuit, and second-order inductive circuit on the aspects of signal-to-noise ratio and damage detection sensitivity. The results show that the designed damage detection method with high-order resonant circuit has higher signal-to-noise ratio and higher sensitivity to damages than the first-order resistive circuit and the second-order inductive circuit. Optimal electrical components, i.e., resistors, inductors, and capacitors, are found in the experiment study. It also indicates that the admittance change due to damages is very sensitive to the inaccuracies of electrical components. We find that the damage detection method with high-order resonant circuit has very high requirement for the resistance in the circuit, that is to say, even a small resistance (for example, 0.5 Ohm) may cause too large damping for the system.

Citation Download Citation

Wanlu Zhou, You Wu, and Lei Zuo "Experiment study on structure health monitoring with high-order resonant circuit", Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 86951O (17 April 2013); https://doi.org/10.1117/12.2009920

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