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WiTrack


A WiTrack is a 3-D motion tracking sensor that is capable of monitoring human body movements.This sensor is able to serve three main purposes, such functions being the following: turning on/off home appliances, tracking a lethal fall, and improving gaming experience. This new piece of technology, currently in its developing stages, was developed by Dina Kati's research group at the MIT Computer Science and Artificial Intelligence Lab. The WiTrack functions through the use of radio signals, which help perform the task of finding a person's current location, the radio signals not been affected at all by walls and other physical obstacles present.

WiTrack functions through the use of radio signals that reflect off a person, this does't require a user to hold on to a wireless device like other previous similar inventions. WiTrack uses a total of four antennas, one antenna is used for transmitting signals and three antennas are used for receiving the signals. Through the use of these antennas, a geometric model is created which is able to calculate the distance between the antennas receiving the signals and the user where the signals derive from.

The time it takes for the signal to travel from the transmitter to the person's body, and back again to the transmitter.

Through the use of the antennas, a geometric model is created which is able to calculate the distance between the antennas and the person's body.

WiTrack classifies a fall as a rapid change on the elevation of a person. WiTrack can track the motion of a person's arm and detect on what direction the arm is pointing at.

The WiTrack was well received, this led to the creation of Emerald. Emerald was an extension to the WiTrack's ability to track falls among the elderly. Just like WiTrack, Emerald tracks the motion of a person through the use of radio signals reflected off the person's body. Once a fall is detected it alerts the person taking care of the elder, or 911. Emerald was presented to President Obamaat the White House on August 4, 2015 and was seen as a huge innovation towards tracking falls amongst the elderly.

A simple gesture, raising your arm and pointing at an appliance, is all it would take in order to transmit a signal. This simple gesture is detected by the use of radio signals, which are then able to turn on/off appliances. This action of turning on and off home appliances doesn't only have to be done in one room, a person is able to control a household appliance even through walls. WiTrack is still able to detect a person's arm gesture even through physical objects.


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