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Nagendra Bhargava Bharatula, Gerhard Tröster

On-Body Context Recognition with Miniaturized Autonomous Sensor Button

Keywords: context recognition, low-power, wearable computer, autonomous operation, activity

The vision of wearable computing is a personal mobile system that is always “on” and always useful and unobtrusive. In this article we present the on-body context recognition analysis considering the functionality or recognition performance, power, and packaging. Interaction with household appliances using a wrist worn “autonomous sensor button” is analyzed as a case study. An overall on-line recognition performance between 85 and 91% is reported. The measured power consumption of the sensor button at 10% duty cycle is around 500μW. The power profiling in an office worker daily life scenario shows that it´s possible to achieve autonomous operation by a solar cell having an area of 40cm²

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 74, 12/2007
Pages: 621 - 628

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