The easiest method is to follow existing lines, as others have said, but here are a few other techniques, in case there are no existing lines.
1. You could try using ultrasonics to echo-locate the robot's position in the space, but I tried this a while ago, and there is a major problem with false echoes, and targets that don't provide a good reflection, so I wouldn't recommend this (in case someone suggests it!).
2. Ultra Wideband. This gives you accurate distances from a rover to some beacons, and is particularly well suited to sports arenas, which are generally obstruction-free. See https://iosoft.blog/real-time-location-ultra-wideband/ for details.
3. GPS RTK. If outdoors with a clear view of the sky, you could get centimetre-level GPS using Real Time Kinematics (RTK), see https://iosoft.blog/rtklient/ However, this won't work indoors at all.
4. Fiducial tags. You put optical markers (special-purpose barcodes) in specific locations, and a camera on the rover is able to locate them very accurately, and compute its position using trigonometry, see https://iosoft.blog/raspberry-pi-positi ... cial-tags/
Of course, knowing the position of the rover is only part of the problem; you then have to steer it accurately.
I've seen autonomous line-marking equipment on tennis courts, it'd be worth finding out how that works.
1. You could try using ultrasonics to echo-locate the robot's position in the space, but I tried this a while ago, and there is a major problem with false echoes, and targets that don't provide a good reflection, so I wouldn't recommend this (in case someone suggests it!).
2. Ultra Wideband. This gives you accurate distances from a rover to some beacons, and is particularly well suited to sports arenas, which are generally obstruction-free. See https://iosoft.blog/real-time-location-ultra-wideband/ for details.
3. GPS RTK. If outdoors with a clear view of the sky, you could get centimetre-level GPS using Real Time Kinematics (RTK), see https://iosoft.blog/rtklient/ However, this won't work indoors at all.
4. Fiducial tags. You put optical markers (special-purpose barcodes) in specific locations, and a camera on the rover is able to locate them very accurately, and compute its position using trigonometry, see https://iosoft.blog/raspberry-pi-positi ... cial-tags/
Of course, knowing the position of the rover is only part of the problem; you then have to steer it accurately.
I've seen autonomous line-marking equipment on tennis courts, it'd be worth finding out how that works.
Statistics: Posted by jayben — Fri Nov 08, 2024 3:57 pm