7 Finger Robot


It is well known that the motion of human fingers is controlled by synergy. Which is the idea that groups of muscles are activated together by a single control signal. This coherent activation is much more efficient than controlling redundant muscles individually. Through sequencing and super-positioning of only a few synergies we can achieve a variation of complex motions that we perform on a daily basis. We want to extend the synergy base control to wearable robotic limbs. Everyday we use various tools. We use a knife and fork and then we drive a car. And if you use these tools for a long time you feel that those tools are just an extension of your body. So that’s exactly what we would like to do with robotics. You have extra fingers and extra arms, if we can control and communicate with them very well you will get to feel like those are an extension of your own body. These are the SR Fingers which are robotic fingers that mount to your wrist. It has six degrees of freedom, three degrees of freedom in each finger. The fingers are quite long so the user can grab things that are usually much larger or much heavier than can do with a single hand. We take input from a sensor glove, which you see over here, and we have these bending sensors that can measure the position of the human fingers. And through an algorithm we can control the output, which are the positions of the SR Fingers with the position of the human fingers so the motion can be very natural and implicit. With the assistance of the SR Fingers the user can grasp objects that are usually too difficult for them to do with a single hand. For example objects that are too large, too heavy or the surface of the object is too hot or too cold. You can also perform tasks that usually require two hands, with a single hand for example taking the cap off of a bottle, or opening a letter. For elderly or people with disabilities, these fingers can help them enjoy a living much more independently. I think that all the technologies and tools that are developed for the handicapped turns out to be useful things for healthy people. And with these particular hands and fingers, we can find many other ways we can be using it. We are still exploring what the kind of tasks will be most useful for the people.

19 Replies to “7 Finger Robot”

  1. The hand itself is not useful yet. It could at most be a simplification of what it could be. Rather than telling us what the hand right now could be used for, tell us what are its potentials for development instead. It would be so much more exhilarating.

  2. If the patients' fingers have lost motion, why do you still use their fingers to control the extra fingers??? doesn't make sense.

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