FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Acoustic Vortex Beam Generation by a Piezoelectric Transducer Using Spiral Electrodes |
Han Zhang1**, Yang Gao2 |
1Key Laboratory of Noise and Vibration, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190 2College of Science, China Agricultural University, Beijing 100083
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Cite this article: |
Han Zhang, Yang Gao 2019 Chin. Phys. Lett. 36 114302 |
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Abstract We propose an innovative method to generate acoustic vortex waves based on a disc piezoelectric transducer that is coated with multi-arm coiled electrodes. Finite element simulation results for single-arm to four-arm coiled electrodes indicate that the method could modulate amplitude and phase spatial distribution of the acoustic waves near the acoustic axis by acoustic field synthesis principle, making the waves rotate spirally in space and form stable focused vortex beams. Compared with the traditional method that requires electronic control of an array consisting of a large number of transducers, this method provides a more effective and compact solution.
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Received: 19 June 2019
Published: 21 October 2019
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PACS: |
43.20.+g
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(General linear acoustics)
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47.32.-y
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(Vortex dynamics; rotating fluids)
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43.38.-p
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(Transduction; acoustical devices for the generation and reproduction of sound)
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02.70.Dh
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(Finite-element and Galerkin methods)
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Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11772349, 11472299, 51704015, 11972354 and 11972365 and the China Agricultural University Education Foundation under Grant No 1101-240001. |
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