Lamb Wave Generation with Piezoelectric Wafer Active Sensors for Structural Health Monitoring
نویسنده
چکیده
The capability of embedded piezoelectric wafer active sensors (PWAS) to perform in-situ nondestructive evaluation (NDE) is explored. Theoretical developments and laboratory tests are used to prove that PWAS transducers can satisfactorily perform Lamb wave transmission and reception, pulse-echo, pitch-catch, and phased array functions of conventional ultrasonics thus opening the road for embedded ultrasonics. Subsequently, crack detection in an aircraft panel with the pulse-echo method is illustrated. For large area scanning, a PWAS phased array is used to create the embedded ultrasonics structural radar (EUSR). For quality assurance, PWAS self-tests with the electromechanical impedance method are discussed.
منابع مشابه
Piezoelectric Wafer Active Sensors (pwas) for Structural Health Monitoring and Embedded Ultrasonics
The capabilities of embedded piezoelectric wafer active sensors (PWAS) to perform insitu ultrasonics for active structural health monitoring (SHM) and nondestructive evaluation (NDE) are explored. The paper shows that PWAS, though low-power, lightweight, and small, can successfully perform Lamb wave transmission and reception, pitch-catch and pulse-echo, as well as large area scanning using the...
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