It's almost science fiction, yet the technology appears in focus. We already knew motion recognition through a dedicated equipment such as Microsoft Kinect for video games.
But this time, the Washington University researchers went further by developing a motion detection that does not require third-party device such as a camera or sensor. Using the Wi-Fi waves and gestures, it is possible to remotely control household appliances.
The idea of WiSee (the name of their technology) is simple: it is just to exploit natural interference caused by the human body through the waves of a home Wi-Fi network (Dopler effect).
Wi-Fi radio signal
Specifically, body movements significantly affect the radio signal used by Wi-Fi to connect two devices, for example. The engineers then identified disruptions related to nine specific actions. These gestures are then detected by their software with a success rate of 94%.
It is then easy to associate these gestures to control functions like playing music in the home, change TV channel, etc. Especially, thanks to Wi-Fi, the technology works in several rooms without difficulty.
Obviously, to avoid switching the appliance at the slightest movement, we must first do a specific act out his WiSee eve ... The video below is rather eloquent and fascinating.