Finding people hiding behind walls is something that keeps soldiers perplexed during conflicts. The only way to know where they lie is to get around it, calling nothing but danger upon them. But with a Radio Tomographic Imaging system developed by engineers at the University of Utah, the soldiers, rescuers and other such social helpers would be able to see through solid walls. The developed RTI system uses a wireless network of radio transmitters to track people moving being walls, helping the user to nail down where people are hiding.
The person tracking system measures the shadows created by the radio waves passing through the persons, and by the information computer images of the same are constructed to know where the person is moving. The experiments got engineers to device a wireless network of 34 nodes, variation in the radio signal whereof allowed the system to track moving people and objects behind walls, within about 3 feet. Check out the videos after the jump.
