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 Post subject: Near Zero-Power Sensor
PostPosted: Tue Sep 12, 2017 9:18 am 
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Royal
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Joined: Thu Sep 25, 2014 11:35 am
Posts: 359
Location: Helmville, Montana
Came across this article this morning and thought it may be of interest to some of you folks out there:

tiny sensor could sleep for years between detection events
The sensor is built to detect infrared light waves, invisible to our eyes but still abundant from heat sources like people, cars, fires, and so on. But as long as none are present, it is completely powered off.

But when a ray does appear, it strikes a surface is covered in tiny patches that magnify its effect. Plasmons are a sort of special behavior of conducting material, which in this case respond to the IR waves by heating up.

"The energy from the IR source heats the sensing elements which, in turn, causes physical movement of key sensor components," wrote DARPA's program manager, Troy Olsson, in a blog post. "These motions result in the mechanical closing of otherwise open circuit elements, thereby leading to signals that the target IR signature has been detected."

"The technology features multiple sensing elements—each tuned to absorb a specific IR wavelength," he wrote. "Together, these combine into complex logic circuits capable of analyzing IR spectrums, which opens the way for these sensors to not only detect IR energy in the environment but to specify if that energy derives from a fire, vehicle, person or some other IR source."

-Devin Coldewey
TechCrunchSeptember 11, 2017

Here's a link to the Nature abstract:
http://www.nature.com/nnano/journal/vao ... lback=true


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PostPosted: Tue Sep 12, 2017 11:15 am 
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Emperor
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Joined: Wed Feb 03, 2010 1:33 pm
Posts: 2877
Location: Magalia, California
Hopefully TRLcam will be testing these before long.


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