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Harvest Electricity from Magnetism

Batteries, solar, mobile to be boosted
4/20/2016 08:58 PM EDT
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R_Colin_Johnson
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Re: Electricity Through The Air
R_Colin_Johnson   4/26/2016 11:43:15 AM
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Yes, and if you are right (about Tesla still being ahead of the state-of-the-art) then:

If we knew now, what he knew then.

Stargzer
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Re: Electricity Through The Air
Stargzer   4/26/2016 11:30:16 AM
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I think he was also ahead of the state-of-the-art in technology, too.  If he knew then what we know now ...

R_Colin_Johnson
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Re: Electricity Through The Air
R_Colin_Johnson   4/26/2016 11:25:29 AM
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Yes, Tesla may have had it right all along. Too bad he had such troubles with funding or he may have solved wireless power long ago.

Stargzer
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Electricity Through The Air
Stargzer   4/26/2016 11:04:23 AM
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Where is Nikola Tesla when you need him?

A man ahead of his time.

 

R_Colin_Johnson
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Re: Starshot mission
R_Colin_Johnson   4/22/2016 2:47:56 PM
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Very interesting URL: Centauri Dreams combined with a proton/electron sail for propulsion, the microwaves might be able to power the on-board sensors and RF. Thanks for the super-interesting link and comment.

R_Colin_Johnson
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Re: Harvesting mechanical energy
R_Colin_Johnson   4/22/2016 2:34:33 PM
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Yes even the authors unscored that they have yet to do efficiency characterization (which usually means their initial estimates are low), but there are applications--like remote sensors or implantsw--that only need small amounts of power. At this point, we'll just have to wait and see.

palf
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Starshot mission
palf   4/22/2016 2:26:15 PM
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Space is filled with microwaves. A SpaceChip might benefit from this effect

http://www.centauri-dreams.org/?p=35473

JamesM951
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Re: Harvesting mechanical energy
JamesM951   4/22/2016 2:51:42 AM
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Harvesting mechanical energy has been going on for a long time. Wind, wave, my old bicycle tire dynamo, etc. The article is talking about a different way of extracting all of the rf energy in the air. No mention of efficiency or how much power they can get. None of the rf energy extraction method seem to yield useful amounts. 

R_Colin_Johnson
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Re: Harvesting mechanical energy
R_Colin_Johnson   4/21/2016 12:46:20 PM
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All you say is true. In fact theses researchers did not set out to solve a problem, but to explore and harness an effect. Now they have a solution looking for a problem, so your speculation may help them think of one. Thanks for the comment.

perl_geek
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Harvesting mechanical energy
perl_geek   4/21/2016 12:05:33 PM
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Self-winding mechanical watches have been converting their wearers' movements into stored energy for years. Surely it would be possible to charge batteries or capacitators in the same way? Perhaps employing a piezo-electric effect to minimise the number of conversion steps, and hence efficiency losses?

There are certainly lots of devices measuring movement, so it's a matter of going from signal to power source. It could be especially useful for medical devices, to replace batteries. If the subject is alive, they're likely to be moving, and if they aren't, it no longer matters.

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