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BlogsAsk The Experts ForumWhat Is the Accuracy of Real-time Location Systems?

What Is the Accuracy of Real-time Location Systems?

Posted By RFID Journal, 01.03.2011
How accurate is RTLS technology when pinpointing assets?

—Name withheld

———
Are you referring to read accuracy or location accuracy? Active tags used in most real-time location systems can usually be read 100 percent of the time, since they broadcast their signal like a cell phone. If a tag is blocked by a metal barrier between that tag and a reader antenna, however, it might not be read.

Passive RTLS solutions are also highly reliable, but passive tags emit a weaker signal that is more easily blocked. A passive tag's signal might be deflected by metal, or it might not penetrate a pallet of bottled water or thick planks of wood.

If you are referring to location accuracy, most passive and active RTLSs can locate a tagged object to within 10 square feet (about 3 square meters). The exception is ultra-wideband (UWB) systems. Because they don't have the same challenges facing multipath solutions, they can locate objects to within a few centimeters.

—Mark Roberti, Founder and Editor,
RFID Journal

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