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I am trying to fit front looking ultrasonic sensor for object detection in my small drone. It will be an outdoor drone and I want to build a reliable system to detect objects and avoid collision. How good are ultrasonic sensors for that? How can I compare camera based object depth detection vs ultrasonic depth detection?

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  • $\begingroup$ This small LiDAR has an effective range of 40 meters and might suit your need well. $\endgroup$
    – GBG
    Commented May 19, 2022 at 17:17

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Ultrasonic detectors are frequently used for obstacle detection on wheeled robots, where a range of 2 or 3 meters is adequate. For a drone, that might not be enough warning - especially for difficult targets like a thin branch or overhead wire.

I think there are longer range ultrasonic detectors (up to 5 or 10m), but they are larger, heavier and user more power.

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  • $\begingroup$ Unless you're talking about hobbyist drones (DJI Tello), or other chinese variants which may use them to auto-land or follow your hand around. $\endgroup$
    – ntakouris
    Commented May 10, 2022 at 14:42

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