From Deseret News archives:
Utah chip may track pets, kids
In real life, this kind of technology would be great for tracking pets or kids, even packages or luggage anything that tends to wander.
But it doesn't really exist.
There are GPS devices, of course, but strap a half-pound GPS collar to a dog and you'll realize it's far from "Mission Impossible." GPS-enabled cell phones are becoming more common, but they have problems, like accuracy indoors, and they aren't cheap.
A Sandy company, S5 Wireless, is looking to bring reality closer to the movies, with small, cheap chips that can be powered by a single battery for up to two years and tracked indoors and outside, over long distances.
For instance, an S5 chip could go into a dog collar, complete with a battery, in a package about the size of a stick of gum that costs $3 to $4 to make. When the battery runs down, it's time to buy a new collar.
The same concept could be applied to a kid's backpack, with an antenna running through the strap.
"It's like a poor man's LoJack or OnStar," said David Carter, S5's chief executive.
What the chips do is basically GPS in reverse. GPS satellites operated by the Air Force send signals to receivers in devices like car navigation systems. Those receivers need a line of sight to the sky, so they work only outdoors and are fairly power-hungry.
By contrast, the S5 chips send radio signals that will be picked up by receivers S5 plans to build. By measuring the difference in the time the signal takes to arrive at three different receivers, S5 can compute the location of the sender to within about 30 feet outdoors, or 45 feet indoors. The same principle can be used for locating some cell phones in an emergency but is much less accurate. LoJack equipment also sends radio signals from a stolen car, but it uses a lot of power and is expensive compared to S5's chips.
"The thing that struck me the most is that their solution allows for very good indoor coverage," said Belgium-based analyst Dominique Bonte, who covers GPS technologies for ABI Research.
Bonte said the weakness of GPS indoors vexes those who want to provide location-based services, like cell-phone messages advertising sales at nearby stores.
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