Right now one of the most common ways quadriplegics move wheelchairs is through a sip and puff device, in which the person sucks or blows through a straw. But Georgia Tech University scientists are testing a headset that will allow wheelchair users to drive their chairs using only their tongues. New Scientist reports:
The device works by using two sensors to track a 5-millimetre-wide magnet attached to the tip of the user’s tongue. The sensors—embedded in a wireless headset—read the fluctuations in the strength of the magnetic field as the tongue moves and transmit the signals on to a computer, where they are interpreted and acted upon.
Of course, who needs a tongue when you can just think the wheelchair into action. Japanese researchers claim they’ve created a device that allows brain waves to control a wheelchair.
The research team claims that the device needs only 125 milliseconds to register the user’s thoughts on the chair’s display panel. The wheelchair uses a blind single-separation and space-time-frequency filtering technology to translate what a person is thinking, and can work so fast that the person doesn’t notice a time delay.
Over time, the researchers state, the system can even learn a person’s tendencies and begin to anticipate their next move.
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Image: flickr/ PsicoCafe
June 30th, 2009 at 2:47 pm
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