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DARPA's N-Zero Sensors Use "0" Power

Keeping troups safe overseas
11/2/2016 00:00 AM EDT
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R_Colin_Johnson
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Re: Why the hyperbole?
R_Colin_Johnson   11/6/2016 8:44:21 PM
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If not having to change batteries saves just one soldiers life, then it will be worth equivocating "zero power" with "no battery." Besides DARPA's "N-Zero" stands for "near zero" not "zero power" because DARPA does consider their battery-less sensors to require power, with their original purpose being to minimize it. They only discovered they could harvest the power in the signal they were trying to detect to turn-on the RF transmitter, powered by harvested energy from the environment (sun, vibrations, etc.) AFTER they started the project.

Bert22306
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Why the hyperbole?
Bert22306   11/4/2016 3:28:14 PM
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Why does DARPA have to decend into hyperbole, instead of saying things as they are? There is no issue here with "zero power sensors." That would require black magic. What is being discussed, instead, are self-powered sensors, which is entirely credible.

Whether you use minute vibrations, wind power, or solar power, the only concept in question here is harvesting energy to store in a local rechargeable battery. Hardly a ground breaking concept!

R_Colin_Johnson
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Re: Amplified crystal radio
R_Colin_Johnson   11/3/2016 9:39:20 AM
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Yes, they mentioned earlier partially successful attempts. Thanks for the details on the amplitude modulation zero-power technology.

traneus
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Amplified crystal radio
traneus   11/2/2016 7:51:15 PM
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I recall magazine articles from the1950s, about using a crystal radio tuned to a strong AM broadcast station to power a one-germanium-transistor amplifier. The amplifier amplified the signal from a second crystal radio tuned to a weak station.

R_Colin_Johnson
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Download Free Until 11th
R_Colin_Johnson   11/2/2016 11:58:15 AM
All the presentations at the IEEE Sensors conference, including the DARPA keynote in this story (which by the way shows many more applications than just monitoring roads for IEDs) can be downloaded free UNTIL NOV.11TH at: www.ieee-sensors2016online.org/ 

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