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Proceedings Paper

Solar micro-power system for self-powered wireless sensor nodes
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Paper Abstract

In self-powered wireless sensor nodes, the efficiency for environmental energy harvesting, storage and management determines the lifetime and environmental adaptability of the sensor nodes. However, the method of improving output efficiency for traditional photovoltaic power generation is not suitable for a solar micro-power system due to the special requirements for its application. This paper presents a solar micro-power system designed for a solar self-powered wireless sensor node. The Maximum Power Point Tracking (MPPT) of solar cells and energy storage are realized by the hybrid energy storage structure and "window" control. Meanwhile, the mathematical model of energy harvesting, storing and management is formulated. In the novel system, the output conversion efficiency of solar cells is 12%.

Paper Details

Date Published: 12 January 2009
PDF: 8 pages
Proc. SPIE 7133, Fifth International Symposium on Instrumentation Science and Technology, 71333Z (12 January 2009); doi: 10.1117/12.810134
Show Author Affiliations
Yongtai He, Beijing Institute of Technology (China)
Chuxiong Normal Univ. (China)
Yangqiu Li, Beijing Institute of Technology (China)
Lihui Liu, Beijing Institute of Technology (China)
Lei Wang, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 7133:
Fifth International Symposium on Instrumentation Science and Technology
Jiubin Tan; Xianfang Wen, Editor(s)

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