Journal
SMART MATERIALS & STRUCTURES
Volume 13, Issue 5, Pages 1131-1142Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/13/5/018
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Enabling technologies for wireless sensor networks have gained considerable attention in research communities over the past few years. It is highly desirable, even necessary in certain situations, for wireless sensor nodes to be self-powered. With this coal in mind, a vibration based piezoelectric generator has been developed as an enabling technology for wireless sensor networks. The focus of this paper is to discuss the modeling, design. and optimization of a piezoelectric generator based on a two-layer bending element. An analytical model of the generator has been developed and validated. In addition to providing intuitive design insight, the model has been used as the basis for design optimization. Designs of 1 cm(3) in size generated using the model have demonstrated a power output of 375 muW from a vibration source of 2.5 m s(-2) at 120 Hz. Furthermore, a 1 cm(3) generator has been used to power a custom designed 1.9 GHz radio transmitter from the same vibration source.
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