 | | Re: A robot who knows his position (fwd) —John A. Tamplin
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| | | (...) I have been thinking about a different approach. I have not actually built anything to use it yet, but I believe it should work reasonably well. The basic idea is similar to the old optical mouse pads -- draw horizontal and vertical lines on (...) (26 years ago, 28-Apr-99, to lugnet.robotics)
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| | | | | Inverting the robot position problem... —Ralph Hempel
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| | | | | (...) This brings out a VERY interesting application. Most bots have trouble navigating a real maze because of obvious slippage problems and generally poor resolution of sensors. What about inverting the problem and printing (using your favorite (...) (26 years ago, 28-Apr-99, to lugnet.robotics)
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| | | | | | | Re: Inverting the robot position problem... —Luis Villa
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| | | | | | (...) You are right about the limitations of image based maze followers, but with you don't even need to get that complicated- any bot that can follow a wall using touch sensors can do a maze reasonably well. Picture a blind man walking along a (...) (26 years ago, 28-Apr-99, to lugnet.robotics)
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| | | | | | | | Re: Inverting the robot position problem... —John A. Tamplin
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| | | | | | (...) That was what I had intended to use -- 1/8" tape spaced at 1" centers on a white background. I was thinking black and red should be sufficiently distinguishable from each other, but that will probably take experimentation. John A. Tamplin (...) (26 years ago, 28-Apr-99, to lugnet.robotics)
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| | | | | | | | Re: Inverting the robot position problem... —Geoffrey Alan Long
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| | | | | | (...) When one color tape overlaps the other color it may be possible for the sensor to miss the bottom color when it passes over the intersection. Maybe you could use a square piece of tape of a third color at the intersection? Like you said, this (...) (26 years ago, 28-Apr-99, to lugnet.robotics)
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| | | | | RE: A robot who knows his position (fwd) —Tilman Sporkert
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| | | | | (...) Just for reference: The optical mouse pads made by Mouse Systems, and shipped with Sun workstations for a long time, used two detectors in the mouse. One used a red LED, and the other one looked the same, but was dark. I suspect it was an IR (...) (26 years ago, 28-Apr-99, to lugnet.robotics)
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| | | | | | | RE: A robot who knows his position (fwd) —Luis Villa
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| | | | | | (...) Wow- sounds really interesting. Keep us all up to date... Luis ###...### "They call the faithful to their knees to hear the softly spoken magic spell:" "There's no place like home... There's no place like home... There's no place like home." (...) (26 years ago, 28-Apr-99, to lugnet.robotics)
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| | | | | Re: A robot who knows his position (fwd) —Mario Ferrari
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| | | | (...) I like John's idea. You could combine it with odometry and get a very affordable and precise positioning system. I'm quite happy with the results of odometry in the short range, I mean until you accumulate too many small errors. My robot (...) (26 years ago, 29-Apr-99, to lugnet.robotics)
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