An Energy Efficient Emergency Alarm System Using Accelerometers
Date Issued
2007
Date
2007
Author(s)
Chen, Hsing-Hau
DOI
en-US
Abstract
In this work, we aim to design an accelerometer-based emergency alarm system able to judge activity state accurately in the meantime achieve energy efficiency.
We use the multi-level sensor data fusion scheme to judge activity state accurately. To achieve energy efficiency, we reduce radio power consumption by cutting down the number of times of transmission utilizing the fusion results. Moreover, we reduce radio power consumption due to idle listening by adopting habitual hand listening.
Our results of human experiments show that for people being conscious, the inactivity period varies from 30 seconds to 4 minutes; for people being asleep, the inactivity period varies from 30 minutes to 40 minutes. The simulation results show that the lifetime of the system is prolonged 39 times utilizing the fusion results compared to naively sending accelerometer data periodically. Utilizing habitual hand listening, the lifetime of the system is prolonged twice compared to the scheme merely utilizing the fusion results.
From the experimental results, we find that the inactivity period to minimize the false positive rate varies from person to person also from activity to activity, i.e., no concrete selection of inactivity period can be drawn. The most contribution of the work is that we set an energy efficient example of emergency alarm system by significantly prolonging the lifetime of system.
Subjects
感測資料融合
加速度計
緊急系統
傳輸體制
energy efficiency
sensor data fusion
accelerometer
emergency alarm system
communication scheme
SDGs
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-R94921030-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):9b1c36577d007d69bfd6a459da046cbd