Quote:
Originally Posted by BlackBird11891
not really it be really easy with a piece like this
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Look at a rear caster and you'll see the axle is located significantly away from the vertical axis of rotation, meaning the wheel 'trails' the vertical axle. Look up the automotive term "Caster" to see where the name came from...
Quote:
Originally Posted by mluckham
Anti-lock brakes in cars use accelerometers plus wheel encoders to detect wheel slip.
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No, only wheel speed is needed for ABS - the derivative of the wheel speed is monitored and any decelerations in excess of a 'known' amount (slope) means the wheel is locking up. Accelerometers are not used for traction control either, where the undriven wheel speeds are compared to the driven wheel speeds to address the effects of excess acceleration. ESP control uses accelerometers.
Quote:
Originally Posted by Dick Linn
I just tried placing my optical mouse on top of a round marble ball and scooting it around. Seems to work, and provides no traction. COTS - Came Out of The Scrap. I'll bet something like that would be legal.
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I think that an optical mouse, 1/16 - 1/32" off the surface, might work well. Doppler radar or some similar method would be pretty cool - can that be done with light or ultrasonics? Or just get a radar gun (
Ramsey Electronics sells a kit for $60) and point it at an angle to the floor.