31 March 2010 Damage detection using magnetic impedance approach with circuitry integration: sensor optimization
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Abstract
Impedance-based damage detection using the magnetic transducer, which is referred to as the magnetic impedance approach, is recently under investigation. In an earlier work we have demonstrated that integrating a synthetic, tunable negative resistance and a tunable capacitor with the magnetic transducer can amplify both the admittance measurement magnitude and the damaged-induced admittance anomaly, and thus have much higher signal-to-noise ratio and higher detection sensitivity than the conventional approach. In this research, we investigate further enhancing the magnetic impedance approach with circuitry integration by systematically studying how the design parameters of the transducer affect the magneto-mechanical coupling. It is demonstrated the magneto-mechanical coupling parameter, which is developed excluding the circuitry parameters and structural properties, is capable of quantifying the dynamic coupling effect under various transducer design parameters, leading to the guidelines for the optimal design and configuration of the new sensing scheme. Extensive numerical and experimental studies are carried out to analyze the parametric influences.
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X. Wang, X. Wang, J. Tang, J. Tang, } "Damage detection using magnetic impedance approach with circuitry integration: sensor optimization", Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 76470B (31 March 2010); doi: 10.1117/12.847763; https://doi.org/10.1117/12.847763
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