0

Full Content is available to subscribers

Subscribe/Learn More  >

Combined FEA-Matlab Optimization of Capacitive Micromachined Ultrasound Transducer Cell

[+] Author Affiliations
Hadi Najar, Babak Assadsangabi, Masoud Dahmardeh, Edmond Cretu

The University of British Columbia, Vancouver, BC, Canada

Paper No. IMECE2010-39394, pp. 229-235; 7 pages
doi:10.1115/IMECE2010-39394
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 10: Micro and Nano Systems
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4447-2
  • Copyright © 2010 by ASME

abstract

A novel approach to the design of a Capacitive Micromachined Ultrasound Transducer (CMUT) cells is presented, using a Genetic Algorithm (GA) based optimization that couples finite element simulations with parameter changes tuned through Matlab scripts. The optimization goal is a maximization of the CMUT efficiency in coupling the electrical, mechanical and acoustic energy domains. Global constraints are related to the pull-in actuation voltage, resonant frequency (set to 5–6MHz, suitable for biomedical applications) and limits on the achievable geometric dimensions. A CMUT is a relatively new MEMS device used to generate and sense ultrasound waves through electrical actuation. Our CMUT design aims to generate ultrasound waves in the 5–6 MHz range, suitable for breast tumor detection. The electro-mechano-acoustical nonlinear coupling makes the design and optimization process difficult, requiring several cycles of finite element analysis. Therefore, a genetic constrained optimization algorithm implemented in Matlab is coupled with finite element simulations of a parameterized structure modeled in COMSOL Multiphysics, in order to maximize the efficiency of the CMUT cell. The main goal is to achieve maximum transducer efficiency, reflected in a better operating device with lower power consumption. The Matlab-FEA optimization loop is driven by the transducer electro-mechanical efficiency, used as a main performance measure to vary the CMUT geometry parameters from one generation to another.

Copyright © 2010 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In