From his hospital bed, a disabled
patient is capable of controlling a telepresence robot and interacting
with people he meets over Skype.
Credit: Alain Herzog / EPFL
For someone suffering from paralysis or
limited mobility, visiting with other people is extremely difficult. A
team of researchers at the Defitech Foundation Chair in Brain-Machine
Interface (CNBI), headed by José del R. Millán, has however been working
on a revolutionary brain-machine approach in order to restore a sense
of independence to the disabled. The idea is to remotely control a robot
from home with one's thoughts. The research, involving numerous
subjects located in different countries, produced excellent results in
both human and technical terms. The conclusions are discussed in the
June special edition of Proceedings of the IEEE, dedicated to brain-machine interfaces.
19 people tested, 100% success rate
Nine disabled people and ten healthy people in Italy, Germany and
Switzerland took part in the task of piloting a robot with their
thoughts. For several weeks, each of the subjects put on an
electrode-studded hat capable of analysing their brain signals. They
then instructed the robot to move, transmitting their instructions in
real time via internet from their home country. By virtue of its video
camera, screen and wheels, the robot, located in a laboratory of Ecole
polytechnique fédérale de Lausanne (EPFL, Switzerland), was able to film
as it moved while displaying the face of the remote pilot via Skype.
The person at the controls, as if moving in place of the robot, was able
to interact with whoever the robot crossed paths with. "Each of the 9
subjects with disabilities managed to remotely control the robot with
ease after less than 10 days of training," said Professor Millán.
Shared control between human and machine
The brain-machine interface developed by the researchers goes even
further. The robot is able to avoid obstacles by itself, even when it is
not told to. To avoid getting overly tired, the pilot can also take a
break from giving indications. If it doesn't receive more indications,
the robot will continue on the indicated path until it receives the
order to stop. In this way, control over the robot is shared between the
human and the computer, allowing the pilot to rest while navigating.
No difference between healthy and disabled subjects
In the end, the tests revealed no difference in piloting ability
between healthy and disabled subjects. In the second part of the tests,
the disabled people with residual mobility were asked to pilot the robot
with the movements they were still capable of doing, for example by
simply pressing the side of their head on buttons placed nearby. They
piloted the robot just as if they were uniquely using their thoughts,
further proof of the effectiveness of the system.
Mature technology available
The positive results of this research bring to a close the European
project called TOBI (Tools for Brain-Computer Interaction), which began
in 2008. Will robots soon become a fact of daily life for people
suffering from a disability? Too soon to say, according to Professor
Millán. "For this to happen, insurance companies will have to help
finance these technologies."
See a video here:
https://www.youtube.com/watch?v=OI6WbcXEWgI
Story Source:
The above post is reprinted from
materials provided by
Ecole Polytechnique Fédérale de Lausanne.
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