Sea waves energy harvester based on impacts

The main problematic about electronic systems deployed in the sea for
long periods of time, is to find a feasible way to supply them with the necessary
amount of power without the necessity of a periodical supervision.
Small systems, such as sensors that belong to a net of milliwatts consuming
devices extended in a wide area, cannot be wire-fed because of the inconveniences
it might create, and they usually include a battery that cannot
be on-field recharged. For this reason, energy harvesting is considered
a great solution in order to create independent, self-sufficient, wireless and
small underwater systems. One of the possible ways to obtain energy within,
and directly from the sea, is taking advantage of the naturally created
sea movements. This paper discusses this innovational idea and presents
some worked out laboratory tests.