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Why can't you measure the size of the wheels?
You can use optical encoders, measuring the dislocation of the floor, but it's too complicated, and requires a small CMOS camera.That's how optical computer mice work.
add a fifth wheel that would measure distance.
if your robot uses 4 omnidirectional wheels, one on each side, like on a square, you can install encoders on 2 wheels that are at 90 degrees. Use one encoder for each direction of travel.
What about technologies that used cameras ?How they works ?
How about ultrasonic distance measuring?
Measuring the distance to what?
Quote from: Cristi_Neagu on May 07, 2010, 05:00:04 PMMeasuring the distance to what?If it's, say, a maze robot it could measure distance to a wall. The OP didn't describe the situation very well, so I threw that out there.