Abstract
A three-dimensional transducer array directivity formula is derived theoretically in this paper to solve the array pattern choice problem of acoustic directional device, based on which the three-dimensional directivity for polygon arrays is analyzed, and the results show: in three-dimensional space, the beam width of the polygon array varies periodically with the rotation angle, and the number of cycles varies with the array form; the mean value of the square array’s beam width is smallest, but its fluctuation is greatest; the fluctuation of the hexagon array’s beam width is smallest, but its mean value is largest; the mean value of the approximate octagonal array’s beam width is close to that of the square array, whose fluctuation is also relatively small, and it has the strongest ability of suppressing side-lobes, which makes it suitable to be the array pattern for acoustic directional device. The three-dimensional directivity analyzing method employed in this paper overcomes the local extremum problem of traditional two-dimensional directivity analyzing method, which is significant for transducer array’s directivity design.
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Acknowledgment
This work is partially supported by National Natural Science Foundation of China (Grant No. 61871093 and No. 61271286). The authors also gratefully acknowledge the helpful comments and suggestions of the reviewers, which have improved the presentation.
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Chen, M. et al. (2020). Transducer Array Design for Acoustic Directional Device. In: Duan , B., Umeda, K., Hwang, W. (eds) Proceedings of the Seventh Asia International Symposium on Mechatronics. Lecture Notes in Electrical Engineering, vol 589. Springer, Singapore. https://doi.org/10.1007/978-981-32-9441-7_93
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DOI: https://doi.org/10.1007/978-981-32-9441-7_93
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