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Finite element analysis of a deformable array transducer.

Publication ,  Journal Article
Ries, LL; Smith, SW
Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
January 1999

Deformable array transducers have previously been described to implement 2-D phase aberration correction of near-field aberrators with only a 1xN or 2xN array configuration. This transducer design combines mechanical phase correction using an actuator with electronic phase correction for a 2-D correction with significantly fewer elements than a full 2-D array. We have previously reported the fabrication and results of a 1x32 deformable array fabricated with a RAINBOW (Reduced And INternally Biased Wafer) actuator. Because of the complicated construction of deformable arrays, we propose to use finite element analysis (FEA) as a design tool for array development. In this paper, we use 2-D and 3-D FEA to model the experimental results of the deformable array as the first step toward development of a design tool. Because the deformable array combines a mechanical actuator with a medical ultrasound transducer, improvement in performance must consider both the ultrasound characterization along with the low frequency actuator characterization. For the ultrasound characterization, time domain FEA simulations of electrical vector impedance accurately predicted the measurements of single array elements. Additionally, simulations of pulse-echo sensitivity and bandwidth were also well matched to measurements. For the low frequency actuator characterization, time domain simulation of the low frequency vector impedance accurately predicted measurement and confirmed the fundamental flexure resonance of the cantilever configuration at 1.3 kHz. Frequency domain FEA included thermal processing effects and predicted actuator curvature arising during fabrication. Finally, frequency domain FEA simulations of voltage-induced displacement accurately predicted measured displacement.

Duke Scholars

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

EISSN

1525-8955

ISSN

0885-3010

Publication Date

January 1999

Volume

46

Issue

6

Start / End Page

1352 / 1363

Related Subject Headings

  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

APA
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ICMJE
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Ries, L. L., & Smith, S. W. (1999). Finite element analysis of a deformable array transducer. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 46(6), 1352–1363. https://doi.org/10.1109/58.808858
Ries, L. L., and S. W. Smith. “Finite element analysis of a deformable array transducer.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 46, no. 6 (January 1999): 1352–63. https://doi.org/10.1109/58.808858.
Ries LL, Smith SW. Finite element analysis of a deformable array transducer. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 1999 Jan;46(6):1352–63.
Ries, L. L., and S. W. Smith. “Finite element analysis of a deformable array transducer.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 46, no. 6, Jan. 1999, pp. 1352–63. Epmc, doi:10.1109/58.808858.
Ries LL, Smith SW. Finite element analysis of a deformable array transducer. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 1999 Jan;46(6):1352–1363.

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

EISSN

1525-8955

ISSN

0885-3010

Publication Date

January 1999

Volume

46

Issue

6

Start / End Page

1352 / 1363

Related Subject Headings

  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences