Robot Skin Detects Your Gentle Caress
Robots working with people need to be able to respond to the slightest touch, so they can react as you would expect a humanoid to react. Two new artificial skins for robots have recently been developed to make this a reality.
( Elastic polymer PDMS skin senses light objects)
Chemist Zhenan Bao at Stanford University, California, and her colleagues used the elastic polymer polydimethylsiloxane (PDMS)1. Bao took a piece of PDMS measuring six centimetres square with pyramid-shaped chunks cut out of it at regular intervals. When the PDMS is squashed, the pyramid-shaped holes that were previously filled with air become filled with PDMS, changing the device's capacitance, or its ability to hold an electric charge.
To make it easier to detect the changes in capacitance, Bao stuck the PDMS capacitor onto an organic transistor, which can read out the differences as a change in current. The team used a grid of transistors to track pressure changes at different points across the material.
The PDMS-based skin is sensitive to the lightest of touches: Bao tested her device by placing a bluebottle fly and a butterfly on it, both of which were clearly 'felt'.
( The use of pressure-sensitive rubber makes this artifical skin flexible. )
Ali Javey at the University of California, Berkeley used semiconductor nanowires pulled into the shape of a grid using a technique called contact printing. The grid was then laid out on a flexible pressure-sensitive rubber — a material that changes its electrical resistance under pressure2.
In the 7-centimetre-square grid, the criss-crossing nanowires act as transistors. Each transistor is like a pixel, and the pressure-induced current change at each individual position can be read out. And because it's made mainly of rubber, the device is bendy. "Because we're using very small inorganic semiconductors, the devices are very flexible," explains Javey. He has bent the sensor into a U-shape with each arm of the 'U' separated by a gap of just 5 millimetres and it still works.
Update 8-Dec-2011: In Roger Zelazny's Hugo award-winning 1966 novel This Immortal gives sf fans a glimpse of this idea. A wrestling robot uses special skin described as a radar mesentery to sense its opponent. End update.
For more exciting robot skin stories, gently caress these links:
Scroll down for more stories in the same category. (Story submitted 9/13/2010)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 0 )
Related News Stories -
Flying Dragon Robot Transforms In Mid-Air
Terrific prototype video.
MXene Hydrogel Skin For Robots Flexes And Senses
'The plastex swam and whirled like boiling toothpaste...' - JG Ballard, 1962.
Drywall Robot Looking For Sheetrock
Sheetrockers have sure changed since my day. Speaking as someone who as done this, I welcome robots.
Robots Help People Get Dressed, As Predicted In 1931
Yes, people of the future, robots will dress you.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
Spicy Tomatoes Created With Genetic Engineering
How about mashed potatoes and brown gravy?
Driverless Hotel Rooms Predicted In 1828
'Did you never see a moving house before?'
Yandex Self-Driving Taxi Is Very Smooth
'The big car was slowing down, its computer brain sensing an exit ahead.'
Shrimp Actually Made Of Algae Is A New Wave Food
Bring in that crop algae.
Cosplay Style Wings Could Work On Moon
'They're lovely! - titanalloy struts as light and strong as bird-bones...'
Tesla Model 3 Has Outside Speaker Grille
Robert Heinlein does it again.
Arizona Luddites Attack Self-Driving Vehicles
'Trucks don't drive by themselves...' Or do they?
Organaut! Russians 3D Print Living Tissue In Space
'For a while your colonists will have to come up [to orbit] to the Hospital...'
WINE Spacecraft To Extract Water From Asteroids
'Yes, strangely enough there was still sufficient water beneath the surface of Vesta.'
Japanese Swordsmiths Take On Asteroids
'... a tiny, rocket-powered projectile, drove towards the mysterious bulk.'
Saturn's Rings To Vanish, Let's Mine Them While We Can
'...the valuable shards of what had once been satellites.'
Humans Could Take Up A LOT Less Space
We'd have a lot more room for gardening...
Implosion Fabrication Shrinks 3D Objects To Nanoscale
'Carter had watched miniaturization a hundred times...'
GMO Houseplant Cleans Your Air
Removes compounds too small to be captured by a HEPA filter.
Nova Meat Can 3D Print Your Dinner
Printing out chicken nuggets.
MIT Scientists Create 'Peek-a-Boo Prober' From Jetsons
Well, George, it's the latest thing.
More SF in the News Stories
More Beyond Technovelgy science news stories