標題: | Flexible Ultrasonic Transducers Using Piezoelectric Fiber Composites with Antisymmetric Interdigital Electrodes |
作者: | Yin, Ching-Chung Wu, Yu-Chien Liu, Yu-Shyan Hsu, Shih-Ming 機械工程學系 Department of Mechanical Engineering |
關鍵字: | flexible transducer;fixed wavelength;guided waves;interdigital electrode;piezoelectric fiber composite |
公開日期: | 2013 |
摘要: | A conformal ultrasonic transducer constructed by piezoelectric fiber composites (PFC) with new arrangement of electrodes is numerically and experimentally studied. This device is designed to transmit and receive guided waves of constant wavelength for structural health monitoring application. A periodic finite element approach has been used to demonstrate the electric field induced by symmetric or anti-symmetric electrodes as well as working principle of this device interacted with the host plate. The extensional mode of this device is used to actuate both A(0) and S-0 modes of Lamb waves in the host plate. The added mass effect of PFC has more notable influence on transmission of S-0 modes than A(0) mode in the area near both edges of PFC. The linear scan of transmitted acoustic waveforms along the axis in front of the transducer by a laser Doppler vibrometer reveals the near-field interference pattern, which is caused by the guided waves of constant wavelength. |
URI: | http://hdl.handle.net/11536/24362 http://dx.doi.org/10.1109/ULTSYM.2013.0175 |
ISBN: | 978-1-4673-5686-2 |
DOI: | 10.1109/ULTSYM.2013.0175 |
期刊: | 2013 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS) |
起始頁: | 675 |
結束頁: | 678 |
顯示於類別: | 會議論文 |