I'm trying to design a collision avoidance system for flying a hexacopter with a 1.5m diameter through a dense plantation of areca nut trees. There is about a 5m space between the trees. The objective is spraying the areca nuts.
I'm trying to determine the suitable sensors that could be used in the collision avoidance system to prevent the drone from damaging the leaves and branches while flying between the trees under the forest canopy (and also from flying into the trees ofcourse).
I'm thinking 360 LiDAR and TOF cameras (flash LiDAR), but I don't know if these would be able to detect leaves and branches.
Could anyone advise me on the range sensors that could be used for collision avoidance when flying under a forest canopy?