Good vibrations
p2pnet.net News:- An MIT team believes it’s up with a new twist on an old idea: how to turn good vibrations into useful energy able to power systems such as laptops at a distance.
Nikola Tesla’s Wardenclyffe Tower, also known as the Tesla Tower, was an early wireless aerial tower builtto demonstrate the ability to send and receive information and power without interconnecting wires, says the Wikipedia.
But the core facility was never finished because Tesla ranout of money.
Now, however, Massachusetts Institute of Technology (MIT) researchers have, “outlined a relatively simple system that could deliver power to devices such as laptop computers or MP3 players without wires,” says the BBC.
The BBC illustration on the right shows how the system might work, and it’s all about resonance, a phenomenon that causes an object to vibrate when energy of a certain frequency is applied.
“When you have two resonant objects of the same frequency they tend to couple very strongly,” MIT researcher Marin Soljacic told the BBC.
When you play a tune on one, then another instrument with the same acoustic resonance will pick up that tune, “it will visibly vibrate,” he said.
Others have worked on highly directional mechanisms of energy transfer such as lasers, says the story, going on:
“However, these require an uninterrupted line of sight, and are therefore not good for powering objects around the home.
“A UK company called Splashpower has also designed wireless recharging pads onto which gadget lovers can directly place their phones and MP3 players to recharge them. The pads use electromagnetic induction to charge devices, the same process used to charge electric toothbrushes.
The BBC has Splashpower co-founder James Hay saying the MIT work was “clearly at an early stage” but “interesting for the future”.
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