Application of COMSOL to Acoustic Imaging

Abstract

Acoustic Imaging of hand movement is being studied with COMSOL and Matlab. COMSOL v3.5a is used to repeatedly calculate the diffraction pattern from a small scattering center, approximately 1.0cm in diameter. In conjunction with a hardware setup, COMSOL was instrumental in the design phase of the project, helping to establish running parameters such as wavelength, timing resolution as well as detector placement. The goal of the project is to collect wavefront arrival times which is then correlated to positions of the scattering centers. A neural network is employed to map the arrival time vector to the collection of scattering center positions. A human hand can be approximated as roughly 30, 1cm marble sized balls. The final position of the scattering centers enables software to reconstruct the hand position making the device effectively an acoustic imager of hand movement, to be used for control systems. No moving parts!

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2010
Accession Number
ADA577031

Entities

People

  • Jean-carlos Hernandez
  • Kevin Mcilhany

Organizations

  • United States Naval Academy

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Acoustic Waves
  • Control Systems
  • Detectors
  • Diameters
  • Diffraction
  • Geometry
  • Inverse Problems
  • Neural Networks
  • Plane Waves
  • Scattering
  • Simulations
  • Training
  • Transducers
  • United States Naval Academy
  • Wave Equations
  • Wavefronts

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Computer Vision.
  • Geodesy

Technology Areas

  • AI & ML