During drone flight, it is very dangerous while there’s obstacle in front. It may cause drone crash if operator is not carefully enough meanwhile. How do drone ensure its flight keep away from obstacles in front automatically?
By now 79GHz millimeter wave radar are newly developed and highly approved for its accurate detection performance. It is very light weight with integrated chip. The only thing you need to do for diy automatic obstacle avoidance drone is to connect the radar with drone and fix it at right place.
Radar Recommended:
Detection Range: 1.5~27 in front of drone
Controller: Pixhawk / Ardupilot
Also all types of open source controller are adjustable for adpation.