Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Reliable Event Detectors for Constrained Resources Wireless Sensor Node Hardware | Hindawi Publishing Corporation EURASIP Journal on Embedded Systems Volume 2009 Article ID 474903 13 pages doi 2009 474903 Research Article Reliable Event Detectors for Constrained Resources Wireless Sensor Node Hardware Marco Antonio Lopez Trinidad1 and Maurizio Valle1 2 1 MUlti-SEnsorS Laboratory Biophysics and Electronics Engineering Department University of Genoa ViaA ll Opera Pia 11a 16145 Genova Italy 2 Microelectronics Group Biophysics and Electronics Engineering Department University of Genoa Via A ll Opera Pia 11a 16145 Genova Italy Correspondence should be addressed to Marco Antonio Lopez Trinidad malopez@ Received 8 April 2009 Revised 8 July 2009 Accepted 24 August 2009 Recommended by Thomas Kaiser 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 L - 1 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 d between the acoustic signal source and the sensor is increased. Copyright 2009 M. A. Lopez Trinidad and M. Valle. 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 .
