Extraction of the Velocity of Walking Human's Body Segments using Ultrasonic Doppler

Abstract

The focus of this paper is to experimentally extract the Doppler signatures of a walking human's individual body segments using an ultrasonic Doppler system (UDS) operating at 40 kHz. In a human's walk, the major contribution to Doppler velocities and acoustic scattering is from the foot, lower leg, thigh (upper leg) and torso. The Doppler signature of these human body segments are extracted experimentally. The measurements were made by illuminating one of these body segments at a time and blocking the remaining body segments using acoustic screens. The results obtained in our experiment were verified with the results published by Bradley using a physics-based model for Doppler sonar spectrograms.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2010
Accession Number
ADA535163

Entities

People

  • Alexander Ekimov
  • Asif Mehmood
  • James M. Sabatier
  • Marshall Bradley

Organizations

  • United States Army Research Laboratory

Tags

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Acoustic Waves
  • Acoustics
  • Computers
  • Continuous Waves
  • Data Acquisition
  • Detection
  • Doppler Effect
  • Doppler Sonar
  • Doppler Systems
  • Extraction
  • Frequency
  • Human Body
  • Measurement
  • Scattering
  • Sonar
  • Waves

Fields of Study

  • Physics

Readers

  • Exercise and Sports Science.
  • Radar Systems Engineering.
  • Structural Health Monitoring of Composite Structures.