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This Sensor Can Stop a Drone’s Rotor in 0.077 Seconds to Save Your Finger

The rotors on camera drones can do serious damage to human flesh if the two come in contact. Researchers are working on a new flesh sensor that would stop a rotor so fast that an approaching finger can be spared from harm.

If the concept of detecting flesh and stopping a spinning blade sounds familiar, it’s because similar technologies already exist. In the world of table saws, the company Saw Stop uses a sensor that puts the brakes on a spinning saw blade in less than 5 milliseconds. Even if you push your finger into the blade quickly, the most damage you’ll receive is a relatively shallow nick.

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