Monday, 29 Sep, 2008 Science
35
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Artificial Hands May Soon Feel Objects

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Artificial hands filled with gel could show a sensitive touch, being able to demonstrate "instinctive" reaction to objects that slip from their grab.

Human hands use a built-in reflex that reacts to small vibrations in the skin when a specific object slips through fingers. Scientists say that unlike human hands, the bionic hands do not have the reflex mechanism which would help automatically calculate the minimum force that is required to hold on to an object. This is why the operators of the artificial hands have to calculate the required force consciously.

According to Jeremy Fishel of University of Southern California, Los Angeles, this task is mentally quite tough. He is one of the team members that developed a new fingertip.

The scientist mentioned that the tip of an artificial arm is made of a rubber skin, being filled with thick silicon gel. In case an object starts slipping, the vibrations within the elastic skin of the bionic finger pass through the silicon gel to acoustic sensors that are connected to an inner acrylic "bone". The whole mechanism generates a prompt feedback, signaling the motor in the bionic hand to tighten their grip till the moment when the vibrations stop.

The bone of the artificial finger is covered with little electrodes and a small voltage is used in each one of them. When the arm holds an object, its elastic skin deforms thus shifting the allocation of gel in the fingerprint and altering the level of electricity that goes between the electrodes. Such information is sent out to a pressure device that is worn on a patch of the healthy skin of the person who operates the arm. This helps the person to "feel" what their bionic arm is touching.

The prototype of the invention will be presented in October at the BioRob conference, which will be held in Scottsdale, Arizona.

Source: NewScientist

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Comments:

32 votes

//7 Nov 27, 2010 03:08 PM | posted by: Chandrashekar
my Freind lost his right hand below elbow just above the wrist in a accident. please give me information about artificial hand and their cost to buy at following address

shekar1323@ymail.com
Chandrashekar
40 votes

//6 Oct 14, 2010 02:32 PM | posted by: madhukar, India
I lost my Left hand from bicep in train accident , plz send me some info and cost @ vaibhav_vgk@rediffmail.com
45 votes

//5 Aug 04, 2010 01:47 PM | posted by: asif
recently my sister lost her Right hand. Can you please give me the information about artificial hand and the cost to buy. Please send the details on asif.fine@gmail.com
30 votes

//4 Jun 29, 2010 07:27 PM | posted by: ahsan khan
i wanna know the cost of this artificial hand with feel


Regards,

Ahsan Khan
35 votes

//3 Mar 10, 2010 07:06 PM | posted by: srinivas
i lost my right hand above elbow,when i was 9 years.Now i am 23 years so please tell me how to get a hand and how what is the cost to following addrress.
srinivasgoud63@yahoo.com
33 votes

//2 Dec 01, 2009 04:53 PM | posted by: dr jeewan
my younger brother lost his right hand below elbow in train accident. please give me information about artificial hand and their cost to buy at following address
drjeewanvishnoims@gmail.com
36 votes

//1 Dec 07, 2008 01:40 PM | posted by: Tadelo Ferede
I have lost my hand when I was a child Can I have such technology and in what way please give me some information throuth the following address
tadelo80@yahoo.com

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