This tiny "soft" robot, just 3cm long, zips along at 20 of its body lengths per second. It can also carry heavy things, like peanuts in the shell, but that slows it down a bit. And amazingly, you can step on it and it won't die. Over at IEEE Spectrum, Ivan Ackerman writes about the little robot developed by researchers from Tsinghua University and UC Berkeley:
It takes a scanning electron microscope to actually see what the robot is made of—a thermoplastic layer is sandwiched by palladium-gold electrodes, bonded with adhesive silicone to a structural plastic at the bottom. When an AC voltage (as low as 8 volts but typically about 60 volts) is run through the electrodes, the thermoplastic extends and contracts, causing the robot’s back to flex and the little “foot” to shuffle...
The researchers also put together a prototype with two legs instead of one, which was able to demonstrate a potentially faster galloping gait by spending more time in the air. They suggest that robots like these could be used for “environmental exploration, structural inspection, information reconnaissance, and disaster relief,” which are the sorts of things that you suggest that your robot could be used for when you really have no idea what it could be used for. But this work is certainly impressive, with speed and robustness that are largely unmatched by other soft robots. An untethered version seems possible due to the relatively low voltages required to drive the robot, and if they can put some peanut-sized sensors on there as well, practical applications might actually be forthcoming sometime soon.
"Surprisingly Speedy Soft Robot Survives Being Stepped On" (IEEE Spectrum)
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