Hi, everyone 
This Demo video is turtlebot3 parks automatically.
we use the intensity and distance of LDS(Laser Distance Sensor) and a reflective tape in this demo.
You don’t need to more sensor, you just need a reflective tape.
Do you have a better idea? Challenge it with turtlebot3. 
https://github.com/ROBOTIS-GIT/turtlebot3_applications
Morning Sun by Nicolai Heidlas Music Stream Katerina Petroviska music | Listen to songs, albums, playlists for free on SoundCloud Creative Commons — Attribution 3.0 Unported— CC BY 3.0 http://creativecommons.org/licenses/b… Music promoted by Audio Library https://youtu.be/UzCFTyluxic
thank you.
