An integrated algorithm for structural health monitoring of composite plate using electromechanical impedance

Improved Algorithm for Efficient Measurement of Electromechanical (e/m) Impedance for Structural Health Monitoring

Electro-mechanical impedance method is emerging as an important and powerful technique for structural health monitoring. The E/M impedance method utilizes as its main apparatus an impedance analyzer that reads the in-situ E/M impedance of the PWAS attached to the monitored structure. Present day impedance analyzer equipments (e.g. HP4194) are bulky, heavy and expensive laboratory equipment that...

LABVIEW IMPLEMENTATION OF THE ELECTROMECHANICAL IMPEDANCE (EMI) METHOD AS PART OF AN INTEGRATED STRUCTURAL HEALTH MONITORING (SHM) SYSTEM by

Development of a Field-Portable Small-Size Impedance Analyzer for Structural Health Monitoring using the Electromechanical Impedance Technique

Electromechanical (E/M) impedance method is emerging as an effective and powerful technique for structural health monitoring. The E/M impedance method utilizes as its main apparatus an impedance analyzer that reads the in-situ E/M impedance of piezoelectric wafer active sensors (PWAS) attached to the monitored structure. Laboratory-type impedance analyzers (e.g. HP4194) are bulky, heavy, and ex...

Structural health monitoring using piezoelectric impedance measurements.

This paper presents an overview and recent advances in impedance-based structural health monitoring. The basic principle behind this technique is to apply high-frequency structural excitations (typically greater than 30kHz) through surface-bonded piezoelectric transducers, and measure the impedance of structures by monitoring the current and voltage applied to the piezoelectric transducers. Cha...

Development of DSP-based Electromechanical (E/M) Impedance Analyzer for Active Structural Health Monitoring

The electromechanical (E/M) impedance method is a powerful technique in active structural health monitoring (SHM). E/M impedance method utilizes as its main apparatus an impedance analyzer that reads the in-situ E/M impedance of piezoelectric wafer active sensors (PWAS) attached to the monitored structure. Present-day impedance analyzer equipments (e.g.HP4194) are bulky, heavy and expensive lab...