Newsgroups: comp.robotics
Path: brunix!news.Brown.EDU!qt.cs.utexas.edu!cs.utexas.edu!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!bgsuvax!rlee
From: rlee@andy.bgsu.edu (Bob Lee)
Subject: Re: How to keep track of robot's position ???
Message-ID: <C2puyJ.LB0@andy.bgsu.edu>
Organization: Bowling Green State Univ.
References: <C2IBB5.HFJ@world.std.com>
Date: Fri, 19 Feb 1993 22:11:04 GMT
Lines: 13

I have another method, one that I am currently using in my project.

- Attach a circular plate to the axle of the robot's wheels. Poke holes
  all around the perimeter of the plate and mount a IR LED and IR sensor on
  either side of the plate even with the holes. Be sure to cover the sensor
  pair to shield it from the ambiant light conditions like sunlight and room
  lighting. When the robot moves the sensor will pick up the IR radiation
  from the LED when a hole in the plate appears between them. Simply count
  the number of times this occurs and you can get an idea of how far you've
  traveled.

-BOB

