Energy harvesting and wireless energy transmission for embedded sensor nodes
2009
In this paper, we present experimental investigations using energy harvesting and wireless energy transmission to
operate embedded structural health monitoring sensor nodes. The goal of this study is to develop sensing systems
that can be permanently embedded within a host structure without the need for an on-board power source. With this
approach the required energy will be harvested from the ambient environment, or periodically delivered by a RF
energy source to supplement conventional harvesting approaches. This approach combines several transducer types
to harvest energy from multiple sources, providing a more robust solution that does not rely on a single energy
source. Both piezoelectric and thermoelectric transducers are considered as energy harvesters to extract the ambient
energy commonly available on civil structures such as bridges. Methods of increasing the efficiency, energy storage
medium, target applications and the integrated use of energy harvesting sources with wireless energy transmission
will be discussed.
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