Autonomous UAV Collision Avoidance

Various approaches have been proposed for UAVs to detect and avoid collision with other aircraft. This approach detects the low-frequency sound of approaching aircraft to detect and to determine bearings and range. Despite the difficulties of removing self-noise, the use of acoustics provides adequate range capability for collision avoidance and provides full spherical coverage. The system determines whether an aircraft is on a collision trajectory, and can operate with multiple aircraft. The sensor system is totally self-contained in an extremely light-weight, low-power, solid-state, passive, low-cost, compact sensor system. The sensor system can therefore be effectively integrated into smaller UAVs.