I have a very small and cheap robot and I wanted to mount a 2D LiDAR on a bottom of it (3cm above the ground). It seems to be great as during the mapping the lidar will detect even small elevations from the ground.

But what happens when a chair will be in front of this LiDAR? I guess it will see only its legs due to a limited optical window (as it is 2D).
How can I cope with that? So my robot will not try to go under the chair.

This is the LiDAR: [LINK](https://www.slamtec.com/en/Lidar/A3)