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Accidental Discovery Leads to Tiny, Battery-Free Tracking Device
Something very strange happened in the R&D lab of a UK-based electronics engineering company. A research team at Roke Manor Research was working on text-based radio frequency systems when a team member suddenly detected a signal—coming from a random bag of components off to the side. A small movement had apparently turned mechanical energy into electrical energy within the bag.
After figuring out how this phenomenon occurred, a Roke team subsequently harnessed it and created a new tiny tracking device. Their invention works over a greater distance than most existing tags, and here's the killer quality that makes it really different from nearly all tracking devices: It works without batteries.
The device is called Agitate and it's a self-charging miniature device, no larger than a quarter. The agitate tag's signal "can be tracked through walls and up to 20 kilometres in built-up areas," writes the company, "with an estimated range of 200 kilometres in free space."
So how does it work? Basically Agitate is made of two plates, one is metal and the other a charged material. When either of the two plates are moved, even just slightly, mechanical energy is turned into electrical and is used to transmit a radio pulse. The signal only lasts a few seconds but is more powerful than a cell phone. And it's very precise—the shorter the radio pulse, the more precise the signal to a specific location.
A tag like this could be used to track just about anything, from objects to pets to people. (The device can endure a washing machine, so it can even be sewn into clothing.) But the applications go beyond tracking, as you'll see when you think about how it works: You shake it and it starts emitting a signal. Imagine a bridge, building or other rigid structure loaded up with Agitate tags. When anything that's not supposed to shake starts to shake, it would be helpful, possibly even life-saving, to know about it.
What would make a swarm of Agitate tags very feasible are the extremely low production costs; Roke is estimating just five cents per unit. With such an affordable and powerful device, the teams at Roke—who are tweaking it even further, making it more powerful and precise—are hoping people like you will come up with innovative and creative uses for Agitate. So, any ideas?
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I found 1 sewn into my jacket there yesterday came home today i was about to cut it out someone beat me to it big hole where it used to be i live alone.
Christchurch has had over 12,600 shallow earthquakes in the last 3 years, about a dozen a day, so this device would be real handy. The attached url is slow to load, but fascinating to watch on fast forward, leave the sticky dots function ticked to see the overall pattern.