Open Access

Reliable Event Detectors for Constrained Resources Wireless Sensor Node Hardware

EURASIP Journal on Embedded Systems20092009:474903

https://doi.org/10.1155/2009/474903

Received: 8 April 2009

Accepted: 24 August 2009

Published: 19 November 2009

Abstract

A novel event detector algorithm, which points out in-door acoustic human activities, for constrained wireless sensor node hardware is proposed in the present paper. In our approach, event detections are computed from the signal energy statistics change rate at two instants separated by an samples interval. The experimentation is run in two phases: (i) the detector characterisation and tuning seek detector configurations that enable event detections from three acoustic human activities: closing a door, dropping a plastic bottle, and clapping;(ii) event detector validation tests measure the reliability to signal events from general acoustic activities, people talking particularly. The test results, which included emulated node hardware, actual sensor node, and a one-hop WSN, demonstrate the detector implementations signaled successfully events. And for the WSN, we found that event detections decay in a nonlinear fashion as the distance , between the acoustic signal source and the sensor, is increased.

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Authors’ Affiliations

(1)
MUlti-SEnsorS Laboratory, Biophysics and Electronics Engineering Department, University of Genoa
(2)
Microelectronics Group, Biophysics and Electronics Engineering Department, University of Genoa

Copyright

© M. A. López Trinidad and M. Valle 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.