Composites from Piezoelectric Fibers as Sensors and Emitters for Acoustic Applications*
نویسندگان
چکیده
Active Fiber Composites (AFC) manufactured at EMPA with commercially available piezoelectric ceramic fibers have been investigated for their potential use as sensors and emitters in various applications. The AFC elements have been evaluated with methods derived from the characterization of ultrasonic transducers and acoustic emission (AE) sensors. Electrical impedance measurements as a function of frequency yielded indications of the frequency ranges of the AFC. Their planar design and lower mass, combined with their intrinsic conformability make AFC elements seem well suited for integrity monitoring of composite structures with AE, acousto-ultrasonics, or low-frequency ultrasonic methods.
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