Piezoelectric Generators 24
Teahouse writes: "The U.S. Navy has developed this polymer "eel" that they dump in the water and get a trickle charge back. The biggest application for this would be for deep sea bouys that track weather across the pacific. This could extend accuracy, and lifespans...and save a few lives along the way. Here is the story." NOAA uses buoys that are solar powered and are left out for a year or more at a time, but I imagine that if this worked they'd be interested, too.
Repeaters for undersea cables? (Score:2)
Another application might be for space tethers is the could be hung like flags off the length of the tether to provide power for warning lights.
Great reading here! (Score:5)
http://www.piezo.com/kgs.html [piezo.com]
http://www.avxcorp.com/prodinfo_productdetail.asp
http://www.ndt.net/article/yosi/yosi.htm [ndt.net]
http://www.tokin.com/Tokin_America_Products/37/p3
http://www.biospec.com/HomePage/Review.html [biospec.com]
http://www.morganelectroceramics.com/pzmat1.html [morganelec...ramics.com]
Have fun...
Connection refused (Score:1)
SOSUS (Score:3)
Football scarves (Score:3)
Rule of thumb regarding the ocean... (Score:3)
three things will happen:
1 - something will grow on it
2 - something will try to eat it
3 - it will corrode
There are *no* exceptions to this rule.
Re:Artificial lure? (Score:1)
Re:Artificial lure? (Score:2)
Re:SOSUS (Score:1)
Re:Artificial lure? (Score:1)
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Re:think of what this could to for the spy game... (Score:2)
If you want these to be practical on a spy craft, you need to use a "free" source of propulsive power. That way, the efficiency losses don't matter. Of course, your craft goes slower, but you don't waste your power source.
There are some "free" sources of propulsive power in the ocean. For instance, somebody worked on a craft that used the thermal expansion of contration of a glycol solution to cause the craft to rise and fall through thermal gradients. Put wings on such a craft and you can use this vertical motion to create horizontil motion. The thermal gradients provide the energy.
Karl
I'm a slacker? You're the one who waited until now to just sit arround.
Bruce talked about this on Viridian (Score:1)
Bruce Sterling recently included this in his Viridian mailing list http://www.bespoke.org/viridian/ [bespoke.org]. Viridian is a great read, although I the archives seem to be lagging a bit behind the mailing list at the moment.
You could start by reading the viridian manifesto [bespoke.org] outlined with gobs of beautiful green.
Re:SOSUS (Score:2)
SOSUS is used for [extremely] long range tracking, but is not all that accurate. [Hey, there's a submarine out there, about 250 miles north of Bermuda! Great for getting count's and rough positions to vector a hunter-killer, but not for targeting a weapon.] To get even that level of precision requires huge fixed arrays. [To know where a target is, you have to know where your sensor is. Your long life bouy would have to be moored to be useful, and mooring cables can be cut as well.]
Sonobouys on the other hand, as you point out, are used against to prosecute a specific threat. They die relatively quickly by design, otherwise the airwaves would be jammed by bouys which are no longer required. The platform that dropped them knows where they are and thus can use that information to prosecute the contact.
There would be very little use for a drifting long life bouy. Such a bouy's sonar would be fairly short ranged, and the contact is likely to move easily beyond that range.
Re:think of what this could to for the spy game... (Score:2)
All the second law says is that the entropy of a closed system doing irreversible work is increasing. A raft with one of these things hanging in the ocean is NOT a closed system.
Back when I was a grad student (early 70's) one of the students in my department developed a device that we called a collagen engine that worked on the same princlple. Collagen is a natural polymer that contracts is salt water, and expands in fresh water (simply taking advantage in the difference of chemical potential between water in both systems) much like the synthetic polymer described here. With this contraction, and winding the collagen fiber around a couple of tapered spindles it is possible to turn the contraction into mechanical work (which could be used to drive just about anything).
In the middle of the ocean the power source is obviously fresh water, which will gradually become contaminated by salt. When the concentration of salt in the fresh water equals that of ocean water there is no potential energy left that can be converted to kinetic energy, and the machine stops.
human body power supply? (Score:1)
another use (Score:1)
i'm an eel (Score:3)
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Great for Pool Parties! (Score:2)
Artificial lure? (Score:3)
wtf (Score:1)
The prototype eel is essentially an underwater flag the size of a football scarf.
What the fuck is a footbal scarf...did they let dennis miller write the article again?!?
tdawg
1# practical use for piezoelectric generators?.... (Score:1)
Thanks Pierre and Jacques [aip.org].
Civilian Applications (Score:1)
I'm not trying to troll here, but I swear the first thing that popped to mind when I read the story heading was "Damn, a flexible, charge-emitting polymer?! They're going to have a field-day making electric dildii with that."
Oh, you think I'm joking? Well, there used to be a company called Folsum Electric. Damned if I can find their page anymore. Anyway, there is a listing of their products with pictures here [blowfish.com]. Personally, I think it's eerie how much that stuff looks like my stereo equipment, well, if my stereo had a 5&3/4" chrome buttplug attached to it anyway... (I wouldn't advise clicking on that if you're easily offended by the sight of objects meant to induce current through various orfices, btw.)
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think of what this could to for the spy game.... (Score:2)
to me this seems like the perfect power source for some form of small submarine style spy tool. add a radar/sonar device, possibly a camera of sorts, a microphone maybe? these things are probably small enough to not get picked up by radar, and could be sent long distances without running out of power.
im sure you guys can think of a few uses for devices like this for use in large bodies of water as well as inside pipes and other common places you wouldnt expect survailence devices...
nifty, yet scary.....
.brad
Drink more tea
organicgreenteas.com [organicgreenteas.com]
Re:Rule of thumb regarding the ocean... (Score:1)
If the navy is interested, they have my number.