Journal of Medical Systems

, 40:251 | Cite as

Estimation of Temporal Gait Events from a Single Accelerometer Through the Scale-Space Filtering Idea

  • Iván González
  • Jesús Fontecha
  • Ramón Hervás
  • José Bravo
Mobile & Wireless Health
Part of the following topical collections:
  1. Advances in Ambient Intelligence for Health (AmIHEALTH 2015)

Abstract

The purpose of this paper is to develop an accelerometry system capable of performing gait event demarcation and calculation of temporal parameters using a single waist-mounted device. Particularly, a mobile phone positioned over the L2 vertebra is used to acquire trunk accelerations during walking. Signals from the acceleration magnitude and the vertical acceleration are smoothed through different filters. Cut-off points between filtered signals as a result of convolving with varying levels of Gaussian filters and other robust features against temporal variation and noise are used to identify peaks that correspond to gait events. Five pre-frail older adults and five young healthy adults were recruited in an experiment. Cadence, step/stride time, step/stride CV, step asymmetry and percentages of the stance/swing and single/double support phases, among the two groups of different mobility were quantified by the system.

Keywords

Quantitative gait analysis Heel-strike detection Toe-off detection Frailty Single accelerometer Mobile phone Scale-space filter 

Notes

Acknowledgments

This work is supported by the FRASE MINECO project (TIN2013-47152-C3-1-R) and also by the Plan Propio de Investigación program from Castilla-La Mancha University.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.University of Castilla-La Mancha, Esc. Sup. de InformáticaCiudad RealSpain

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