Piezoelectric Wafer Active Sensors (pwas) for Structural Health Monitoring and Embedded Ultrasonics
نویسنده
چکیده
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 phased-array principle. The opportunities for implementation in structural health monitoring systems and the needs for further research are also discussed.
منابع مشابه
Embedded Ultrasonics with Piezoelectric Wafer Active Sensors for Structural Health Monitoring of Thin-wall Structures
The capability of embedded piezoelectric wafer active sensors (PWAS) to perform in-situ ultrasonic nondestructive evaluation (NDE) is explored. Laboratory tests are used to prove that PWAS can satisfactorily perform Lamb wave transmission and reception. Subsequently, pulse-echo method for crack detection in an aircraft panel is illustrated. For large area scanning, a PWAS phased array is used t...
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