Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7136498 | Sensors and Actuators A: Physical | 2015 | 30 Pages |
Abstract
The purpose of the current study is to design and optimize a piezoelectric impact-based micro wind energy harvester (PIMWEH) as a power source for wireless sensor networks. First, using new PIMWEH design, numerical simulation, and experimental comparison analysis, we determined the most durable PIMWEH shape for application as a power source of WSNs. The experimental results show that the optimized PIMWEH generated 2.8Â mW (RMS value) and did not crack within 40Â h. Second, to supply power for sensor operation, we performed an experiment using a rectifying circuit, an AC-DC converter, and an electrical charger. The experimental results show a pure DC voltage signal of 3.3Â V, and the output power was 1.0Â mW (3.1Â mW/cm3). A charging energy of 0.845Â J was obtained in 24Â min. Third, we calculated the efficiency of the PIMWEH to evaluate its performance. Using a three-step energy conversion process (using wind turbine, PZT, and LTC3588-1), an overall PIMWEH power conversion efficiency of 3.2% was obtained. For one day, the PIMWEH could supply power that is 6263-25055 times the power requirement of a commercialized ZigBee transmission. In addition, transmitting signals at intervals from 3.4 to 13Â s was made possible.
Related Topics
Physical Sciences and Engineering
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Authors
Hyun Jun Jung, Yooseob Song, Seong Kwang Hong, Chan Ho Yang, Sung Joo Hwang, Se Yeong Jeong, Tae Hyun Sung,