Applications of Fresnel-Kirchhoff diffraction theory in the analysis of human-motion Doppler sonar grams

被引：8

作者：

Bradley, Marshall ^{[1
]}

Sabatier, James M. ^{[2
]}

机构：

[1] Univ Mississippi, Natl Ctr Phys Acoust, University, MS 38677 USA

[2] USA, Res Lab, Adelphi, MD 20783 USA

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2010年 / 128卷 / 05期

关键词：

D O I：

10.1121/1.3499702

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Observed human-gait features in Doppler sonar grams are explained by using the Boulic-Thalmann (BT) model to predict joint angle time histories and the temporal displacements of the body center of mass. Body segments are represented as ellipsoids. Temporally dependent velocities at the proximal and distal end of key body segments are determined from BT. Doppler sonar grams are computed by mapping velocity-time dependent spectral acoustic-cross sections for the body segments onto time-velocity space, mimicking the Short Time Fourier Transform used in the Doppler sonar processing. Comparisons to measured data indicate that dominant returns come from trunk, thigh and lower leg. (C) 2010 Acoustical Society of America

引用

页码：EL248 / EL253

页数：6

共 7 条

[1] Fresnel-Kirchhoff Diffraction Theory
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[7] A Numerical Examination of the Diffraction Properties of Profiled Beam Transmission through Binary Apertures and Random Phase Screens Using Fresnel-Kirchhoff Diffraction Theory
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[J]. IEEE NATIONAL AEROSPACE AND ELECTRONICS CONFERENCE (NAECON 2014), 2014, : 290 - 301

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