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Updated: Sep 21, 2025
06:51
Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
7.1K
One-dimension frequency-wavenumber-domain based model for ultrasonic waves generated by dual-array transducers.
Alan C Kubrusly1, Lei Kang2, Steve Dixon3
1Centre for Telecommunication Studies, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil.
Ultrasonics
|June 6, 2022
Summary
Dual-array transducers enable controlled ultrasonic wave generation. This study models their behavior, achieving significant unidirectional wave output, improving ultrasonic testing applications.
Area of Science:
- Ultrasonic wave generation
- Array transducer technology
- Non-destructive testing
Background:
- Array transducers offer frequency and wavelength selectivity for generating ultrasonic waves.
- Dual-array transducers, with interlaced and connected elements, allow for controlled wave generation.
- Unlike single arrays, dual arrays can achieve unidirectional wave propagation, crucial for targeted applications.
Purpose of the Study:
- To develop a one-dimensional analytical model for ultrasonic waves generated by dual-array transducers.
- To analyze the effectiveness of unidirectional wave generation using time-delayed excitation signals.
- To validate the model by comparing its predictions with experimental results.
Main Methods:
- Developed a model based on the frequency-wavenumber domain excitability (operation region) of the dual-array.
- Utilized time-delayed excitation signals to achieve constructive and destructive interference for unidirectional generation.
- Experimentally validated the model using a dual periodic permanent magnet array electromagnetic acoustic transducer to generate shear-horizontal ultrasonic guided waves.
Main Results:
- The analytical model accurately predicts ultrasonic wave generation by dual-array transducers.
- Time-delayed excitation signals effectively enable unidirectional wave generation.
- Experimental results showed up to 40 dB of unidirectionality, validating the model's predictions.
Conclusions:
- The developed analytical model provides a robust method for understanding dual-array transducer wave generation.
- Dual-array transducers are effective for achieving highly unidirectional ultrasonic wave generation.
- This research advances the capability of ultrasonic guided wave generation for improved NDT applications.
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