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How do you send an automated alert to a security guard whenever anyone
tries to climb a fence, but ignore anyone simply leaning on said chain
link? How can a sensor pick up the presence of a Jeep but ignore a
steady flow of gigantic airliners? Damned if we know, we're just
bloggers, but a team at the USC Viterbi School of Engineering figured
it out, creating what's called the Smart Fence. It's a series of
sensors plus some associated circuitry that easily handle the
situations described above and do so with amazing accuracy. How
amazing? Here are the results of one test:
A perfect (100%) identification of unexpected intrusion events, and an
average of less than two false positives per week and zero false
negatives for recognition of human footsteps. In addition, no false
positives or false negatives were reported by the installed fence
sensors for a duration of 45 days of unattended operation, which
included several days of seasonal storms.
Yeah, pretty good. The system is being developed for use around
airports and military bases and is currently being funded largely by
Navy grants. Now, if only they could create a system to prevent "laser
events" and airport blizzards we might be able to travel safely again.
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