Piezoelectric Active Sensor Self-Diagnostics Using Electrical Admittance Measurements

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Application of Electromechanical Impedance Technique for Engineering Structures: Review and Future Issues (2010, unknown): “The length and width influence the signature in horizontal plane, whereas thickness in vertical plane (Esteban, 1996; Park et al., 2006; Annamdas, 2007) of admittance signature.”
Performance assessment and validation of piezoelectric active-sensors in structural health monitoring (2006, methodology): “In our previous work (Park et al 2006), we theoretically and experimentally demonstrated that the degradation of the mechanical/electrical properties of the PZT sensor and its attachment to the external structure produces measurable and distinct changes in the capacitance of PZT materials.”
Development of an impedance-based wireless sensor node for structural health monitoring (2007, methodology): “It should also be noted that, although the new device is tested only for SHM in this study, the device can be applicable to sensor diagnostics and validation for piezoelectric active sensors as discussed in (Park et al 2006a, 2006b).”
Energy Harvesting for Structural Health Monitoring Sensor Networks (2008, background): “Recently several studies have focused on issues of sensor validation [30, 31].”