Vibroacoustic Monitoring – Techniques for Human Gait Analysis in Smart Homes

Conference: Lebensqualität im Wandel von Demografie und Technik - 6. Deutscher AAL-Kongress mit Ausstellung
01/22/2013 - 01/23/2013 at Berlin, Deutschland

Proceedings: Lebensqualität im Wandel von Demografie und Technik

Pages: 6Language: englishTyp: PDF

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Dobbler, Klaus; Fiser, Moritz; Fellner, Maria; Rettenbacher, Bernhard (Joanneum Research Forschungsgesellschaft mbH, DIGITAL - Institute for Information and Conununication Technologies, Steyrergasse 17, 8010 Graz, Österreich)

The aim of this research project is to automatically analyse human behaviour in indoor environments using vibration sensors attached to the floor. Vibration sensors are used in an absolute passive manner so the monitared persons do not have to wear any sensors. Furthermore this technology preserves the private sphere of monitored persons. In order to extract geometric gait features like motion trajectories out of the vibrational signals, the main part of this work focuses on methods for localization of seismic sources on the two-dimensional floor surface. Starting from a conventional TDOA (Time Difference of Arrival) based technique using uniaxial acceleration sensors we show how to minimize installation cost by reducing the number of sensor entities via tri-axial sensor technology. We describe the main challenges of wave propagation in solids, namely dispersion and multipath propagation and discuss their implications on robustness and accuracy of localization results. To conclude our work we introduce potential application scenarios.