Naval researchers soak up the sun below sea level with special solar cells

Posted on 08/06/2012 by Joseph Volpe

Have you ever harbored delusions of living in an underwater city inhabited by the likes of Ariel or those aliens from The Abyss? Yeah, well keep dreaming, because this engineering feat won't necessarily lead to that (the fictional mer people part, that is). What it will pave the way for is a new means of harnessing the sun's rays below sea level to power submerged sensor systems and platforms. The research, carried out by a team of U.S. Naval scientists, forgoes traditional crystalline and amorphous silicon photovoltaic cells for those based on the more efficient gallium indium phosphide. The reason? Turns out those latter semiconductors are well-suited to absorbing photons in the blue / green spectrum -- precisely the wavelengths that diffused sunlight take on under water. Using this newer approach, the team's proven that about 7 watts of energy can be generated per square meter of these deployed cells at a depth of up to 9.1 meters (30 feet). Further refinements and testing are, naturally, on deck, but soon enough we may be looking at a whole new world of possibilities under the sea.

[Image courtesy Flickr]

Naval researchers soak up the sun below sea level with special solar cells originally appeared on Engadget on Fri, 08 Jun 2012 06:05:00 EDT. Please see our terms for use of feeds.

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LASR: behind the curtain of the Navy’s robotics laboratory

Posted on 01/05/2012 by Brian Heater

I don't know all that much about the Naval Research Laboratory when I arrive in DC for "the public's first opportunity to look inside" the space's new $17 million Laboratory for Autonomous Systems Research (LASR). I give the cab driver the address, and he casually tells me that it "stinks," illustrating this notion with a universally familiar hand gesture. He means it literally, too - that you can smell the place, simply driving by in a cab, with the windows up. He says this with such assurance, such gusto, that I fully expect it to smell like the city dump. A wall of stink.

It's not much to go on, but it's something. And while I can thankfully report that his reaction was a bit overstated - at least on this particular day - there's certainly a distinct odor to the place. It's a sprawling 130-acre complex that sits sandwiched between the 295 freeway and the waters of the Potomac River; a series of nearly identical big, white buildings facing inward toward a grassy courtyard. On the way in, a space with what appears to be crushed cars is visible from the freeway.

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LASR: behind the curtain of the Navy's robotics laboratory originally appeared on Engadget on Tue, 01 May 2012 14:00:00 EDT. Please see our terms for use of feeds.

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US Navy shows off its new LASR autonomous robot testing facility

Posted on 02/04/2012 by Brian Heater

All the fun of the desert and the rainforest from the (relative) comfort of home? Sign us up. That's the promise offered by the admittedly awesomely named Laboratory for Autonomous Systems Research (that's LASR, for you abbreviators out there), first announced last month. The robotics lab, housed in a $17.7 million building at the Naval Research Laboratory in Washington DC, offers up around 50,000 square feet, a portion of which is aimed at reproducing some of the Earth's more extreme ecosystems to test out naval robotics. The facility is home to firefighting robots, swimming 'bots and hydrogen fuel cell-powered unmanned aircrafts, to name but a few.

The Naval Research Laboratory opened the doors of the massive facility up to members of the media today, and Engadget was on-hand along with a moderate sized gathering of fellow reporters. Included in the tour were two simulated environments. The Tropical High Bay is designed to mimic rainforest terrain, with flowing water, fog and climate controlled temperature and humidity. The Desert High Bay is a bit let complex in its environmental simulation, limited to a sand pit, rock way, and adjustable light, smoke and wind.

Meanwhile, an on-site indoor pool is used to challenge aquatic vehicles. Testers demonstrated the Pectoral Fin Swimmer - an autonomous bot inspired by the biological movements of fish, in order to access areas not reached by more traditional propel driven robots. Also on hand was Lucas, a Mobile, Dexterous, Social (MDS) humanoid robot [pictured above] with a Segway base. The laboratory demonstrated how the robot was capable of reasoning in a simulated firefighting scenario - and, equipped with an extinguisher, was capable of putting out a very real fire on the floor of the facility.

We'll have a more in-depth tour of the facility in the near future. In the meantime, check out a sneak-peek of what we saw in the gallery below.

Gallery: US Navy shows off its new LASR autonomous robot testing facility