Interrupt-Based Step-Counting to Extend Battery Life in an Activity Monitor
Joint Authors
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-12-01
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Most activity monitors use an accelerometer and gyroscope sensors to characterize the wearer’s physical activity.
The monitor measures the motion by polling an accelerometer or gyroscope sensor or both every 20–30 ms and frequent polling affects the battery life of a wearable device.
One of the key features of a commercial daily-activity monitoring device is longer battery life so that the user can keep track of his or her activity for a week or so without recharging the battery of the monitoring device.
Many low-power approaches for a step-counting system use either a polling-based algorithm or an interrupt-based algorithm.
In this paper, we propose a novel approach that uses the tap interrupt of an accelerometer to count steps while consuming low power.
We compared the accuracy of step counting and measured system-level power consumption to a periodic sensor-reading algorithm.
Our tap interrupt approach shows a battery lifetime that is 175% longer than that of a 30 ms polling method without gyroscope.
The battery lifetime can be extended up to 863% with a gyroscope by putting both the processor and the gyroscope into sleep state during the majority of operation time.
American Psychological Association (APA)
Kim, Seung Young& Kwon, Gu-In. 2015. Interrupt-Based Step-Counting to Extend Battery Life in an Activity Monitor. Journal of Sensors،Vol. 2016, no. 2016, pp.1-6.
https://search.emarefa.net/detail/BIM-1110523
Modern Language Association (MLA)
Kim, Seung Young& Kwon, Gu-In. Interrupt-Based Step-Counting to Extend Battery Life in an Activity Monitor. Journal of Sensors No. 2016 (2016), pp.1-6.
https://search.emarefa.net/detail/BIM-1110523
American Medical Association (AMA)
Kim, Seung Young& Kwon, Gu-In. Interrupt-Based Step-Counting to Extend Battery Life in an Activity Monitor. Journal of Sensors. 2015. Vol. 2016, no. 2016, pp.1-6.
https://search.emarefa.net/detail/BIM-1110523
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1110523