New Technology “Sees” Through Walls

On the left, a person walks around inside a square of 28 radio transceivers.  The person creates "shadows" in the radio waves, resulting in the image displayed on right, in which the person appears as a reddish-orange-yellow blob. (Image Credit: Sarang Joshi and Joey Wilson, University of Utah)

On the left, a person inside a square of 28 radio transceivers. On the right, the "shadow" created in the radio waves. The person appears as a reddish-orange-yellow blob. (Image Credit: Sarang Joshi and Joey Wilson, University of Utah)

Engineers at the University of Utah have developed a system that uses radio tomographic imaging (RTI) to track people moving behind solid walls.  The researchers said that area to be imaged simply needs to be surrounded by radio transceivers that both send and receive signals.  This technology could be used to find intruders and rescue hostages or fire victims, in addition to other uses.  For more information, see ScienceDaily.

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