Wi-Vi Technology which can see through walls using Wi-Fi


This was an amazing technology developed by researchers at MIT's Computer Science and Artificial Intelligence Laboratory. It is like as we see in the video games just came into the real world. They have developed X-ray vision known as “Wi-Vi”. This technology uses Wi-Fi signals to track the movement of people behind walls and closed doors.

This type of technology is very useful for the army fighters and policeman who want to catch the terrorists who are hiding through the walls when the firing starts.

When a Wi-Fi signal is transmitted at a wall, a portion of that signal penetrates through and reflects off any humans that happen to be moving around in the other room. Since only a tiny fraction of the signal passes through the wall, with the rest being reflected, the researchers had to devise a technology that could cancel out the arbitrary reflections, and keep only those reflecting from moving human bodies.

The developer has tuned a system that uses two transmission antennas and a single receiver. The two antennas transmit almost identical signals, except the second antenna's signal is the inverse of the first, resulting in interference.

This interference causes the signals to cancel each other out. Since any static objects that the signals hit create identical reflections, they are also cancelled out by this effect. Only the reflections that change between the two signals, like moving bodies on the other side of the wall, arrive back at the receiver, allowing the system to track the moving people.

So, if the person moves behind the wall, all reflections from static objects are cancelled out, and the only thing registered by the device is the moving human.

Share on Google Plus

About Unknown

Hello mate, Iam karunkumarbattula, Always love to write about Tech Gadgets and Automobiles. A day dreamer, Thinker and occasional writer.
    Blogger Comment
    Facebook Comment

0 facebook-blogger:

Post a Comment