Energy harvesting
- 최초 등록일
- 2011.04.11
- 최종 저작일
- 2011.03
- 3페이지/ 한컴오피스
- 가격 1,000원
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Energy harvesting
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본문내용
Energy harvesting
Energy harvesting (also known as power harvesting or energy scavenging) is the process by which energy is derived from external sources (solar power, thermal energy, wind energy, salinity gradients, and kinetic energy), captured, and stored for small, wireless autonomous devices, like those used in wearable electronics and wireless sensor networks.
Devices
There are many small-scale energy sources that generally cannot be scaled up to industrial size
- Piezoelectric: Piezoelectric crystals or fibers generate a small voltage whenever they are mechanically deformed. Vibration from engines can stimulate piezoelectric materials, as can the heel of a shoe.
- Wristwatches: Some wristwatches are already powered by kinetic energy (called kinetic watches), in this case movement of the arm. The arm movement causes the magnet in the electromagnetic generator to move. The motion provides a rate of change of flux, which results in some induced emf on the coils.
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