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 EPE  Vol.9 No.4 , April 2017
Power Efficiency Calculation of Acoustic Energy Transmission by a Stepped-Plate Radiator
Yonghwan Hwang, Wonkyu Moon*
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Abstract: One performance measure of in-air ultrasonic radiators, such as wireless power transmission, is the power efficiency of the transducers. The efficiency of most in-air acoustic radiators is low, even at ultrasonic frequencies; however, a large radiating plate with steps introduced by Gallego-Juarez et al., can provide efficient radiation. Their in-air acoustic radiator consists of a Langevin transducer for wave excitation, a mechanical amplifier, and a stepped plate with a large radiating area. This study describes a design processing technique for a stepped-plate radiator developed for optimum energy transmission at the target point in air. The total efficiency required to transfer the acoustic energy was divided into three categories, and the design parameters of each category were calculated to maximize the efficiency. This design technique allows optimum acoustic radiation efficiency and maximum acoustic energy transmission depending on various acoustic energy transfer conditions.
Keywords: Stepped-Plate Radiator, Maximum Radiation Efficiency, Acoustic Energy Transmission
Cite this paper: Hwang, Y. and Moon, W. (2017) Power Efficiency Calculation of Acoustic Energy Transmission by a Stepped-Plate Radiator. Energy and Power Engineering, 9, 232-240. doi: 10.4236/epe.2017.94016.
References

[1]   Lee, H., Kang, D. and Moon, M. (2009) A Micro-Machined Source Transducer for a Parametric Array in Air. The Journal of the Acoustical Society of America, 125, 1879-1893.
http://dx.doi.org/10.1121/1.3081385

[2]   Moon, M. and Lee, H. (2007) Ultrasonic Ranging System and Method Thereof in Air by Using Parametric Array. U.S. Patent, 7, 196-970.

[3]   Barone, A. and Gallego-Juarez, J.A. (1971) Flexural Vibrating Free-Edge Plates with Stepped Thicknesses for Generating High Directional Ultrasonic Radiation. The Journal of the Acoustical Society of America, 51, 953-959.
http://dx.doi.org/10.1121/1.1912944

[4]   Gallego-Juarez, J.A. and Rodriguez-Corral, G. (1973) Piezoelectric Transducer for Air-Borne Ultrasound. Acta Acustica United with Acustica, 29, 234-239.

[5]   Gallego-Juarez, J.A., Rodriguez-Corral, G. and Gaete-Garreton, L. (1978) An Ultrasonic Transducer for High Power Applications in Gases. Ultrasonics, 16, 267-271.

[6]   Gallego-Juarez, J.A. (2010) High-Power Ultrasonic Processing: Recent Developments and Prospective Advances. Physics Procedia, 3, 35-47.

[7]   Kinsler, L.E., Frey, A.R., Coppens, A.B. and Sanders, J.V. (2000) Fundamentals of Acoustics. 4th Edition, John Wiley & Sons, Inc, New York. Sherman, C.H. and Butler, J.L. (2007) Transducers and Arrays for Underwater Sound. Springer, New York.
https://doi.org/10.1007/978-0-387-33139-3

 
 
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