Sci Tech .....

ROBO RODENT

An international team of researchers is taking inspiration from rats’ whiskers to develop sensor technology that will help robots in tactile navigation

MUMBAI MIRROR BUREAU

Researchers at England’s University of Sheffield, Germany’s Bernstein Centre for Computational Neuroscience (BCCN) and the Humboldt-Universität zu Berlin – along with others – are using the animal kingdom to help develop sophisticated touch technology for use in intelligent machines, such as robots.
The new 7.3 million euro ‘BIOTACT’ project brings together nine research groups from seven countries – including Israel and the US – to develop innovative artificial touch technologies, including a “whiskered” robotic rat.
This new technology could have a number of possible applications in modern-day society from search and rescue robots that could pick their way through rubble and debris to mineclearing machines to planetary rovers in space.
The technology could also be used closer to home in domestic products; for example vacuum cleaners that could sense textures for optimal cleaning.
While vision supplies information about distant objects, touch is invaluable in sensing the nearby environment. However, in designing intelligent, life-like machines, the use of touch has been largely overlooked, until now.
Led by Professor Tony Prescott of Sheffield’s Department of Psychology, the international team will develop new technologies inspired by the use of touch in the animal kingdom.
In nocturnal creatures, or those that inhabit poorly-lit places, this physical sense is widely preferred to vision as a primary means of discovering the world.
The Norwegian rat and the Etruscan shrew, for example, use their whiskers to make sense of their environment. The mammals sweep their whiskers back and forth at high speeds in a controlled manner, allowing them to use touch signals alone to recognise familiar items, determine the shape and surface of objects, and track and capture prey.
The research team at the BCCN – led by Professor Michael Brecht of the Humboldt-Universität zu Berlin – will focus on the Etruscan shrew, the smallest mammal.
This animal hunts prey of almost the same size as itself. Guided by vibrissal touch, this animal places breath-takingly fast and precise attacks on its insect prey.
“The sensory-motor performance of this animal is astonishing. Using novel microscopy techniques will offer unique insights about the mammalian brain function,” Brecht says.
Using their understanding of the animal kingdom, the team will develop two machines endowed with similar sensing capabilities, including a whiskered robot that can seek-out, identify and track fast-moving target objects.
“Overall, our project will bring about a step-change in the understanding of active touch sensing and in the use of whisker-like sensors in intelligent machines,” Prescott said.
“Today’s life-like machines, such as robots, don’t make effective use of touch. By learning from nature and developing technologies that do use this physical sense, our researchers will be able to enhance the capabilities of the machines of the future.”

TOP: One of the first whiskered robot prototypes to be designed and built as part of the project. ABOVE: An example of what the final ‘robot rat’ will look like, that can seek-out, identify and track fastmoving target objects