Resolution analysis using vector components of a scattered acoustic intensity field

摘要

A target analysis method that includes the steps of: illuminating a target with acoustic waves; positioning a device at multiple acoustic vector sensing positions about the target in a scattered acoustic field of reflected waves to simultaneously measure acoustic pressure and particle velocity at each vector sensing position; converting using a Hilbert transform the measured acoustic pressures and particle velocities into a complex signal having active real and reactive imaginary vector component; computing respective active and reactive acoustic intensities at each vector components; and mapping field structure nulls being zero crossings of the active and reactive intensities to a bitmap representation of decomposed scattered target acoustic intensities of the target.

主权项

1. A target resolution analysis method comprising the steps of:
illuminating a target with acoustic waves;
positioning a device at multiple acoustic vector sensing positions approximate to the target in a scattered acoustic field of reflected waves; simultaneously measuring acoustic pressure and particle velocity at each of the vector sensing positions;
converting with a Hilbert transform the measured acoustic pressures and particle velocities into a complex signal having active (real) and reactive (imaginary) vector components; computing active and reactive acoustic intensities at each of the vector components; and mapping decomposed scattered active and reactive acoustic intensity minimum field structures (nulls) to a bitmap representation of the target.