Drones are agile things, but they're not exactly known for their quick reactions. If you want to knock one out of the sky, a well-thrown ball or even a spear should do the trick. Not for much longer, though, researchers from the University of Zurich have created a drone that can autonomously dodge objects thrown at it – even at close range.
You can see quadcopter showing these skills in the above video (though no-one tested it with a wrench). And okay, some of those throws are pretty easy, but the drone is still reacting completely autonomously. And although we've seen quadcopters that can maneuver around static objects like trees, avoiding moving items mid-air is much trickier.
"We wanted to really push the boundaries and see what these robots are capable of," the University of Zurich research Davide Falanga said The Verge .
Giving drones an auto-dodge feature would be handy for many uses-cases. It would make drones safer, allowing them to dodge flying birds or nearby humans. It would also be helpful for military and law enforcement deployments. If you have a drone monitoring a protest, for example, being able to dodge thrown objects is a very useful skill.
Falanga says dodging dynamic objects is beyond the reach of even the most commercially advanced drones on the market today. He says Skydio's R1 drone probably has the best autonomous features but "it still struggles with avoiding moving objects."
As Falanga and his colleagues, Suseong Kim and Davide Scaramuzza, unpack in their research paper, there are many reasons for this limitation Technical factors, including the responsiveness of a drone's engine and the latency of their sensors, all create bottlenecks. What's easy for a human is incredibly tricky for electronics.
The University of Zurich's drone, though, has one big advantage over commercial quadcopters: an advanced sensor known as an event camera. While traditional cameras record a set number of frames each second and pass them on to software for processing, event cameras only send data when the pixels in its field of vision change in intensity. This means they use less data and have a lower latency. In other words: a faster response time.
Event cameras are still uncommon, though. They cost thousands of dollars and are not usually seen outside a research lab. Falanga says they will eventually hit the mainstream, but it will take years of development to bring them down to a reasonable cost. "Absolutely I think in the long run I think we'll see more and more use of these cameras," he says.
Until then, drones will remain vulnerable to anyone with a good eye and a strong throwing arm.