Ana Sayfa English Interesting DJI patent: automatic propeller detection

Interesting DJI patent: automatic propeller detection

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While sifting through the ever-increasing amount of DJI patents, I came across an interesting one that allows a drone to detect propellers automatically. A safety feature that will stop you from taking off with loose propellers or none at all.

The patent was submitted to the U.S. patent office with a filling date all the way back in 2017. Earlier this year, the patent was released to the public. The system was invented by Jiang Bin under SZ DJI Tech Co. Ltd.

After reading the patent’s abstract and accompanying documents, it seems like a simple system that can detect if a propeller has been attached and if it has been attached to the motor correctly.

The automatic propeller detection system uses what looks to be a hall effects sensor placed in the motor to detect if the propeller is correctly in place using a magnet in the propeller’s hub. If the sensor isn’t able to detect a correctly attached propeller, the drone cannot take-off.

“A propulsion assembly for an unmanned aerial vehicle (UAV) includes a motor configured to rotate in a first direction, a propeller seat configured to be driven by the motor to rotate in the first direction and to receive a propeller, and a sensor configured to collect sensing data useful for determining whether the propeller is locked to the propeller seat, without requiring operation of the motor.”

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