Unmanned aerial vehicles (UAVs for short) have proved their usefulness as military tools. But most UAVs aren’t truly autonomous: they’re operated remotely by a human controller from the ground.
To become truly autonomous, UAVs will need to get far better at sensing obstacles and reacting in time to avoid a collision. This will be especially important if they are ever to operate in commercial space.
Sanjiv Singh, a professor and researcher at Carnegie Mellon University, has developed a new system to help UAVs do just this.
Since most UAVs are fairly small and lightweight, they can’t carry the heavy, power-hungry sensors that larger aircraft can use to detect other planes. So Singh and student Debadeepta Dey developed an algorithm that uses an ordinary camera and several software programs to detect potential obstacles.
Their sense-and-avoid system functions across a wide field of view (from up to three miles away) and in a wide range of weather conditions. It does this by finding contrasting points in a video image (such as a dark spot against white clouds) and tracking them to determine movement.
In the video below, the system outlines moving objects in red, such as a plane (distinguished by the green box). It also identifies the characteristic movement of dust–rather than a flying obstacle–on the lens (blue).
Click here to see a bigger version of the video.
“We have proved that sense and avoid for unmanned aerial vehicles using passive sensors is a very real possibility, and with some more time and maturity, this will evolve into a deployable standard technology,” says Dey, who presented details of the system at the International Conference on Field and Service Robotics yesterday.
The sense-and-avoid system can pick out a small, two-seater plane from five miles away, says Dey. So far, he and Singh have tested it from the ground using real aircraft. Currently, it produces some false positives (identifying bugs as planes, for example), but the researchers plan to couple a lidar sensor to the camera to improve it. By bouncing a laser beam off of the obstacle, the lidar will measure its distance to help determine whether it’s really a plane on a collision course or just an insect hitching a ride.
These materials were meant to revolutionize the solar industry. Why hasn’t it happened?
Perovskites are promising, but real-world conditions have held them back.
Why China is still obsessed with disinfecting everything
Most public health bodies dealing with covid have long since moved on from the idea of surface transmission. China’s didn’t—and that helps it control the narrative about the disease’s origins and danger.
Anti-aging drugs are being tested as a way to treat covid
Drugs that rejuvenate our immune systems and make us biologically younger could help protect us from the disease’s worst effects.
A quick guide to the most important AI law you’ve never heard of
The European Union is planning new legislation aimed at curbing the worst harms associated with artificial intelligence.
Get the latest updates from
MIT Technology Review
Discover special offers, top stories, upcoming events, and more.