Phased transducer array for acoustic energy harvesting inside an MRI machine

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Abstract

In this study, an array of piezoelectric speakers is used to focus acoustic energy on a single transducer that acts as a harvester. The transmitting transducers are located along a curve that fits inside the magnetic resonance interferometer (MRI) torus interior. The numerical results for the pressure fields generated by circular-shaped and parabolic-shaped phased transducer arrays are compared, and the optimal locations for the acoustic energy harvester are determined for both shapes. In a series of experiments, the pressure on the axis of a single standalone speaker and on the axis of the non-phased parabolic array was measured to verify the numerical model. The experimentally determined location of the pressure peak in front of the parabolic-shaped array is predicted numerically with 4% accuracy. An acoustic energy harvester is placed at the location of the pressure peak, and the optimal resistive load value is determined experimentally for maximum output power. Approximately 1 µW of electric power is dissipated on the load when 10 mW is consumed by the source array at its second resonant frequency of 16 kHz, resulting in the electric input-to-output efficiency of 10-4.
Original languageEnglish
Title of host publicationProceedings of Joint UFFC, EFTF and PFM Symposium, 21-25 July 2013, Prague, Czech Republic
Pages1979-1982
DOIs
Publication statusPublished - 2013

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magnetic resonance
transducers
interferometers
acoustics
energy
output
electric power
pressure distribution
resonant frequencies
curves

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Klymko, V., Roes, M. G. L., Duivenbode, van, J., & Lomonova, E. (2013). Phased transducer array for acoustic energy harvesting inside an MRI machine. In Proceedings of Joint UFFC, EFTF and PFM Symposium, 21-25 July 2013, Prague, Czech Republic (pp. 1979-1982) https://doi.org/10.1109/ULTSYM.2013.0505
Klymko, V. ; Roes, M.G.L. ; Duivenbode, van, J. ; Lomonova, E. / Phased transducer array for acoustic energy harvesting inside an MRI machine. Proceedings of Joint UFFC, EFTF and PFM Symposium, 21-25 July 2013, Prague, Czech Republic. 2013. pp. 1979-1982
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abstract = "In this study, an array of piezoelectric speakers is used to focus acoustic energy on a single transducer that acts as a harvester. The transmitting transducers are located along a curve that fits inside the magnetic resonance interferometer (MRI) torus interior. The numerical results for the pressure fields generated by circular-shaped and parabolic-shaped phased transducer arrays are compared, and the optimal locations for the acoustic energy harvester are determined for both shapes. In a series of experiments, the pressure on the axis of a single standalone speaker and on the axis of the non-phased parabolic array was measured to verify the numerical model. The experimentally determined location of the pressure peak in front of the parabolic-shaped array is predicted numerically with 4{\%} accuracy. An acoustic energy harvester is placed at the location of the pressure peak, and the optimal resistive load value is determined experimentally for maximum output power. Approximately 1 µW of electric power is dissipated on the load when 10 mW is consumed by the source array at its second resonant frequency of 16 kHz, resulting in the electric input-to-output efficiency of 10-4.",
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Klymko, V, Roes, MGL, Duivenbode, van, J & Lomonova, E 2013, Phased transducer array for acoustic energy harvesting inside an MRI machine. in Proceedings of Joint UFFC, EFTF and PFM Symposium, 21-25 July 2013, Prague, Czech Republic. pp. 1979-1982. https://doi.org/10.1109/ULTSYM.2013.0505

Phased transducer array for acoustic energy harvesting inside an MRI machine. / Klymko, V.; Roes, M.G.L.; Duivenbode, van, J.; Lomonova, E.

Proceedings of Joint UFFC, EFTF and PFM Symposium, 21-25 July 2013, Prague, Czech Republic. 2013. p. 1979-1982.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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AB - In this study, an array of piezoelectric speakers is used to focus acoustic energy on a single transducer that acts as a harvester. The transmitting transducers are located along a curve that fits inside the magnetic resonance interferometer (MRI) torus interior. The numerical results for the pressure fields generated by circular-shaped and parabolic-shaped phased transducer arrays are compared, and the optimal locations for the acoustic energy harvester are determined for both shapes. In a series of experiments, the pressure on the axis of a single standalone speaker and on the axis of the non-phased parabolic array was measured to verify the numerical model. The experimentally determined location of the pressure peak in front of the parabolic-shaped array is predicted numerically with 4% accuracy. An acoustic energy harvester is placed at the location of the pressure peak, and the optimal resistive load value is determined experimentally for maximum output power. Approximately 1 µW of electric power is dissipated on the load when 10 mW is consumed by the source array at its second resonant frequency of 16 kHz, resulting in the electric input-to-output efficiency of 10-4.

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Klymko V, Roes MGL, Duivenbode, van J, Lomonova E. Phased transducer array for acoustic energy harvesting inside an MRI machine. In Proceedings of Joint UFFC, EFTF and PFM Symposium, 21-25 July 2013, Prague, Czech Republic. 2013. p. 1979-1982 https://doi.org/10.1109/ULTSYM.2013.0505