Abstract
Recent developments in micro electromechanical systems (MEMS) point towards a wide range of applications for a new breed of integrated wireless sensors. Applications include embedded sensors in “smart” buildings, for example vibration and temperature monitoring, medical implants and remote sensing. The new devices, which will communicate by microwatt power, short range radio (picoradio), have been compared with communicating neurons. The vision is that hundreds, or even thousands of small independent, low cost devices will be built into, say, a building, producing a powerful, interlinked network of information transmission. But they require a long- term power source, which can be a significant problem. The limitations of batteries have led to interest in scavenging by conversion of another form into electrical energy. Possible energy sources are solar, body functions such as breathing, natural temperature gradients etc. This article considers energy scavenging from vibration.
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