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2006 10th IEEE International Symposium on Wearable Computers (2006)
Montreux, Switzerland
Oct. 11, 2006 to Oct. 14, 2006
ISSN: 1550-4816
ISBN: 1-4244-0597-1
pp: 135-136
Nagendra Bharatula , Wearable Computing Lab, ETH Z?rich, Switzerland, E-mail: bhargava@ife.ee.ethz.ch
Jamie Ward , Wearable Computing Lab, ETH Z?rich, Switzerland
Paul Lukowicz , Department of Mathematics and Informatics, University of Passau, Germany
Gerhard Troster , Wearable Computing Lab, ETH Z?rich, Switzerland
ABSTRACT
In this article we present the use of MPPT (Maximum-Power-Point-Tracking) for miniaturized on-body activity recognition systems. We evaluate different solarcells and apply MPPT to study the suitability for on-line activity systems. With a wrist worn solar cell, MPPT allows us to track power levels of 1.35 mW for indoors/wood-workshop lighting and 7.21 mW during dull outdoor lighting conditions. The overall efficiency of the proposed technique is 96% in the best-case scenario and 80% in the worst-case.
INDEX TERMS
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CITATION

N. Bharatula, J. Ward, P. Lukowicz and G. Troster, "Maximum Power Point Tracking (MPPT) for on-body Context Systems," 2006 10th IEEE International Symposium on Wearable Computers(ISWC), Montreux, Switzerland, 2006, pp. 135-136.
doi:10.1109/ISWC.2006.286363
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