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RFID Tag Arrays Can Be ­sed to Track a Person's Movement

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The basics of a radio-frequency identification system.

Researchers at Carnegie Mellon University have figured out how radio-frequency identification tags could be used in a new class of wearable designed to track physical movement and shape change.

Credit: Google

Carnegie Mellon University (CMU) researchers have developed a method of using radio-frequency identification (RFID) tags to track movement.

Said CMU's Haojian Jin, "By attaching these paper-like RFID tags to clothing, we were able to demonstrate millimeter accuracy in skeletal tracking."

The researchers used a single mobile antenna to set up a time-of-flight sensor; as backscatter bounces back from multiple tags embedded in apparel, nuanced differences in signal timing between sensors can be used to calculate the motion of an object, and changes to its shape.

CMU's Jingxian Wang said with backscatter from RFID arrays, "We can turn any soft surface in the environment into a touchscreen."

Potential applications include using RFID-outfitted clothes as virtual avatar controllers and motion-tracking devices, or to monitor vital infrastructure.

From ZDNet
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