Mechanical fingers grasp like the real thing
F.Y. Wu and H.H. Asada
Robo-fingers could help humans get a grip. A new type of wearable robot pairs two tonglike digits with a wrist brace to give a person the dexterity of a seven-fingered hand.
After slipping on the contraption, users can palm a basketball, single-handedly twist off a bottle cap or hold a tablet computer and type on it using the same hand, MIT mechanical engineers Faye Wu and Harry Asada reported July 15 at the Robotics: Science and Systems conference in Berkeley, Calif.
Wu and Asada’s robotic digits, thick tubes that jut from the wrist, use a computer program to coordinate movements with the wearer’s hand motions.
To teach the program where to direct the digits, Wu held different objects while wearing a prototype with glove-mounted fiber-optic sensors, and then she moved the robo-fingers into place. The sensors recorded the position of her real fingers so that the researchers could automatically match the robot’s movements with hers.
The grasp-enhancing gadget could one day help healthy or disabled users lift large or heavy objects, or hold extremely hot or cold items.
F. Y. Wu and H.H. Asada. Bio-artificial synergies for grasp posture control of supernumerary robotic fingers. Robotics: Science and Systems Conference, Berkeley, Calif., July 15, 2014.
A. Yeager. Exoskeleton helps paraplegic kick off World Cup. Science News Online, June 12, 2014.
G. Popkin. Nanotube whiskers could aid robot-human interaction. Science News Online, January 24, 2014.
M. Rosen. Beginnings of bionic. Science News. Vol. 182, November 17, 2012, p. 18.