It did so throughout that time without slowing or losing force. In another test, they programmed one of the robot fingers to bend and flex repeatedly to press a sensor every second for 11 minutes. Next, they used the hand to pick up dumbbells weighing 18 kilograms, which it could do without breaking. They found that the force applied by the finger hardly weakened during this time.
He and his colleagues also tested the durability of the robotic hand by programming a finger to push down onto a sensor constantly for 30 minutes. Read more: Pianists fitted with robotic thumb can learn to play with 11 digits They found it can: it could be programmed to hold a pair of scissors and cut paper, and also to manipulate tweezers to pick up and place a microchip on a circuit board.
The researchers also tested whether the robotic hand could use tools. Uikyum Kim at Ajou University in South Korea and his colleagues, who built the hand, say it can hold an egg without cracking it, pour drinks and crush aluminium cans. This enables the digits to tilt sideways, to flex back and forth and to fold, giving the hand a range of movements comparable to that of a human hand. Each finger is driven by three small motors that fit within the palm and move metal parts that act like tendons around a total of 20 joints. Weighing 1.1 kilograms, the hand is 22 centimetres long and made of steel and aluminium. The hand could eventually be used as a prosthetic or in robots that use artificial intelligence to manipulate objects. A highly dexterous, human-like robotic hand with fingertip touch sensors can delicately hold eggs, use tweezers to pick up computer chips and crush drink cans.
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