Hi,
Wrote to the group a couple of months ago on a related subject. Since then I've been looking into ways to improve the way in which my robot measures it's orientation.
So far I've increased the wheel click resolution to 88 clicks per rev, which works out to be 0.5 degrees per turned click, obviously not degrees turned on the wheel.
But I want to have one other sensor to measure orientation, my I've been thinking about using either:
1) Analogue devices ADXRS401EBWhich leads onto my questions.
1) I want it to be encased with in the robot, which is an aluminium casing (Top, bottom and sides) - how could this affect the magnetic compass/sensor.2) What is a reasonable number of clicks to count on per wheel rev (I have a simple black/white stripped paper with IR sensor).
3) What experience do people have of measuring orientation with various sensors, which is the best...i.e. most accurate, reliable and independent of external factors i.e. wheel slippage?Many Thanks
Mark