期刊
IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS
卷 4, 期 3, 页码 354-363出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JETCAS.2014.2337195
关键词
Energy harvesting; piezo electric harvester; thermoelectric generator; ultra-low power systems; wearable devices; wireless sensor nodes
资金
- ATIC-SRC [2013-HJ-2440]
Energy harvesting is an important enabling technology necessary to unleash the next shift in mm-scale and mu W power computing devices, especially for wireless sensor nodes. Energy harvesting could play an important role in biomedical devices where it extends the lifetime of the system. Furthermore, it eliminates the need for periodic maintenance such as exchanging or recharging the battery. This paper presents experimental results of thermal and vibration energy harvested from human body using the thermoelectric generator and the piezo electric harvester, respectively. Contemporary research revealed that most of the published data, including harvesters datasheets, are adjusted for industrial or laboratory-setting environment. This paper focuses on obtaining experimental data from the human body using off-the-shelf harvesters, and discrete electrical components. Our experimental results showed that for 9 cm(2) area of thermoelectric generator, up to 20 mu W of power can be generated at 22 degrees C room temperature. In addition, 0.5 cm(3) piezo electric harvester can generate up to 3.7 mu W when running at 7 mi/h. These data correspond to a power density of 2.2 mu W/cm(2) and 7.4 mu W/cm(3) for thermoelectric generator and piezo electric harvester, respectively. As such, the harvested energy from thermal and vibration of human body could potentially power autonomous wearable and implantable devices.
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