Navigation Links
Robotic gripper runs on coffee ... and balloons
Date:10/25/2010

ITHACA, N.Y. The human hand is an amazing machine that can pick up, move and place objects easily, but for a robot, this "gripping" mechanism is a vexing challenge. Opting for simple elegance, researchers from Cornell University, University of Chicago and iRobot have bypassed traditional designs based around the human hand and fingers, and created a versatile gripper using everyday ground coffee and a latex party balloon.

They call it a universal gripper, as it conforms to the object it's grabbing rather than being designed for particular objects, said Hod Lipson, Cornell associate professor of mechanical engineering and computer science. The research is a collaboration between the groups of Lipson, Heinrich Jaeger at the University of Chicago, and Chris Jones at iRobot Corp. It is published today (Oct. 25) online in Proceedings of the National Academy of Sciences.

"This is one of the closest things we've ever done that could be on the market tomorrow," Lipson said. He noted that the universality of the gripper makes future applications seemingly limitless, from the military using it to dismantle explosive devises or to move potentially dangerous objects, robotic arms in factories, on the feet of a robot that could walk on walls, or on prosthetic limbs.

Here's how it works: An everyday party balloon filled with ground coffee any variety will do is attached to a robotic arm. The coffee-filled balloon presses down and deforms around the desired object, and then a vacuum sucks the air out of the balloon, solidifying its grip. When the vacuum is released, the balloon becomes soft again, and the gripper lets go.

Jaeger said coffee is an example of a particulate material, which is characterized by large aggregates of individually solid particles. Particulate materials have a so-called jamming transition, which turns their behavior from fluid-like to solid-like when the particles can no longer slide past each other.

This phenomenon is familiar to coffee drinkers familiar with vacuum-packed coffee, which is hard as a brick until the package is unsealed.

"The ground coffee grains are like lots of small gears," Lipson said. "When they are not pressed together they can roll over each other and flow. When they are pressed together just a little bit, the teeth interlock, and they become solid."

Jaeger explains that the concept of a "jamming transition" provides a unified framework for understanding and predicting behavior in a wide range of disordered, amorphous materials. All of these materials can be driven into a 'glassy' state where they respond like a solid yet structurally resemble a liquid, and this includes many liquids, colloids, emulsions or foams, as well as particulate matter consisting of macroscopic grains.

"What is particularly neat with the gripper is that here we have a case where a new concept in basic science provided a fresh perspective in a very different area robotics and then opened the door to applications none of us had originally thought about," Jaeger said.

Eric Brown, a postdoctoral researcher, and Nick Rodenberg, a physics undergraduate, worked with Jaeger on characterizing the basic mechanisms that enable the gripping action. Prototypes of the gripper were built and tested by Lipson and Cornell graduate student John Amend as well as at iRobot.

As for the right particulate material, anything that can jam will do in principle, and early prototypes involved rice, couscous and even ground- up tires. They settled on coffee because it's light but also jams well, Amend said. Sand did better on jamming but was prohibitively heavy. What sets the jamming-based gripper apart is its good performance with almost any object, including a raw egg or a coin both notoriously difficult for traditional robotic grippers.


'/>"/>

Contact: Blaine Friedlander
bpf2@cornell.edu
607-254-8093
Cornell University
Source:Eurekalert

Related biology technology :

1. Dr. Ramin Mirhashemi, MD of Gynecological Oncology Associates Discusses Uterine Fibroid Treatment with da Vinci Robotic Hysterectomy Surgery
2. Health Robotics Releases Results of First 20 i.v.STATIONs Return On Investment (ROI) Studies in the USA and Canada
3. Health Robotics South East Asia Wins two key Cancer Therapy Outsourcing Projects in Malaysia and Thailand
4. Health Robotics and McKesson to Showcase i.v.STATION and i.v.SOFT at ASHPs Summer Meeting, Tampa, June 6-8, 2010
5. Stevens team places third in 2010 IEEE/NIST Mobile Microrobotics Challenge
6. Health Robotics i.v.STATION Certified as the Only Robot to Comply with Security Guidelines for Controlled Substances
7. World first remote heart operation to be carried out in Leicester using robotic arm
8. Haydon Kerk Motion Solutions Inspires Next Generation of Innovators as Silver Supplier of the FIRST Robotics Competition
9. Health Robotics to Showcase CytoCare at ISOPP (May 2010) and Charles University General Faculty Hospital of Prague
10. /C O R R E C T I O N -- Health Robotics/
11. Health Robotics Continues its Global Expansion With December 09 ASHPs Launch of Joint Venture in Canada
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2016)... ... ... Weeks after hosting a carpal tunnel syndrome workshop with Dr. Oz on the ... the Fitzmaurice Hand Institute, has announced the addition of MRI diagnostic imaging services on ... 1 of about 3 currently available in the United States. Developed specifically for the ...
(Date:5/26/2016)... May 26, 2016  Agriculture nutrients are in the ... Iowa is running their nitrate removal system ... Erie and coastal regions nationwide are painting ... this widespread issue. NECi Superior Enzymes, a ... Peninsula, developed a new, easy to use device that ...
(Date:5/26/2016)... ... May 26, 2016 , ... ... today announced several positive developments that position the Company for the future. ... the transaction, Craig F. Kinghorn has been appointed Chairman of the Board, Curtis ...
(Date:5/25/2016)... ... May 25, 2016 , ... Founder ... double board-certified in surgery and surgery of the hand by the National Board ... stranger to going above and beyond in his pursuit of providing the most ...
Breaking Biology Technology:
(Date:4/26/2016)... LONDON , April 26, 2016 ... EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... a partnership to integrate the Onegini mobile security ... (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ) The ... enhanced security to access and transact across channels. ...
(Date:4/15/2016)... 2016  A new partnership announced today will ... decisions in a fraction of the time it ... high-value life insurance policies to consumers without requiring ... Force Diagnostics, rapid testing (A1C, Cotinine and HIV) ... pressure, weight, pulse, BMI, and activity data) available ...
(Date:4/13/2016)... physicians supporting Medicaid patients in Central Florida ... telehealth thanks to a new partnership with higi.   ... can routinely track key health measurements, such as blood ... they opt in, share them with IMPOWER clinicians through ... location at no cost. By leveraging this data, IMPOWER ...
Breaking Biology News(10 mins):