P3.3 - Detection of ultrasonic plate waves using ceramic strip transducers
- AMA Conferences 2015
2015-05-19 - 2015-05-21
- Proceedings SENSOR 2015
- P3 - Ultrasound
- L. Claes, F. Bause, J. Rautenberg, B. Henning - University of Paderborn (Germany)
- 775 - 779
By examining the propagation characteristics of acoustic waves through a specimen its material properties can be determined. One method to realize such a measurement is the excitation and detection of ultrasonic waves in plate-like waveguide structures. Therefore, a transducer with a small active area is required to detect guided waves with a small wavelength. However, the output voltage of pierzoelectric transducers is approximately proportional to its avtive area. To circumvent this problem transducers with an active area that ideally resembles a line are used . If therese detectors are aligned with the wave front of the propagating waveguide modes, the lower bound of the detectable wavelength can be minimized due to the transducer's minimum extent in propagation direction. As an alternative to transducers based on piezoelectric polymer films, a ceramic strip transducer is presented. In order to verify the functionality of the transducer selected measured results and their evaluation are shown.