3D motion tracking system 'looks' across the wall

Researchers at the MIT have created a new way to track motion through walls and it can provide higher accuracy than previous methods. This technology is called WiTrack, which can 'sense' the movement of people in three dimensions.

>>> Video: 3D motion tracking system "look" through the wall

WiTrack is similar to a submarine or submarine detection system. It uses a radio transmitter and 3 receive antennas. A low-level radio signal will be sent from the transmit antenna, and other antennas will pick up the signal as it responds. The system can then calculate the difference and will know the exact location of the person in real time.

The accuracy of WiTrack is 100 times higher than that of systems using WiFi signals and 1,000 times higher than that of mobile phone transmitters. The accuracy of WiTrack is in the range of 10 to 20cm. Previously in June, the team developed a similar system that uses less antennas and uses Wi-Fi signals, and the accuracy is low. It also can not give accurate location under three-dimensional space but only know how far the person stands away from the antenna.

Researchers have proposed some practical applications for WiTrack technology as it can be used for police and emergency rescue teams in crime prevention as well as search for stranded victims. buildings. It can also be used to detect when someone falls to the ground or floor. WiTrack can also be applied to games, which can turn a player's entire home into a scene where the game takes place, without requiring you to stand in front of your computer such as playing a Nintendo Wii or Xbox Kinect.