E-Skin Technology: Taking a big step in the world of robotics, Hong Kong scientists have developed an electronic skin that can sense touch and respond like humans. The purpose of this new technology is to make humanoid robots more safe, sensitive and faster responding.
Artificial skin inspired by human nerves
A team from the City University of Hong Kong, led by engineer Yuyu Gao, has created a unique neuromorphic robotic skin. This technology processes touch and pain like the human nervous system.
According to this research published in the journal PNAS, this e-skin is capable of sensing contact with a surface, sensing damaging pressure, and taking immediate protective action.
Difference between light touch and harmful pressure
While ordinary robotic skin only measures pressure, this new e-skin converts touch into electrical signals that are similar to human nerve signals. The greater the pressure, the more different the signal takes. This enables the robot to differentiate between a light touch and a dangerous shock.
How does the human reflex system work?
This electronic skin is made up of four different functional layers whose role is similar to biological nerves. When there is light contact, the signal is transmitted to the central processor, where it is used to detect objects or safely interact with humans.
But as soon as the pressure crosses the prescribed ‘pain threshold’, the system works in a completely different way. The signal reaches the motors directly and bypasses the main processor. The result is that the robot immediately retreats, just as a human would pull away a hand when it touches a hot or sharp object.
Increased security due to faster response
Scientists say that due to this direct signal path the reaction time is significantly reduced. This not only protects the robot from harm, but also improves the safety of surrounding objects and humans. In simple words, this skin has its own local ‘pain response’.
Ability to recognize one’s own condition
Another special thing about this system is that it can monitor its own condition. Every sensor in the skin keeps sending a small signal continuously, which shows that it is working properly. If there is a cut or tear somewhere, that signal stops and the robot immediately identifies the damaged area.
Easy repair, no need to open entire structure
Although this skin cannot heal itself, it is very easy to repair. Made of magnetic modules, this e-skin is connected like building blocks. If any part fails, it can be removed and replaced with a new part in seconds, without the need to dismantle the entire robot.
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