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EwgsHomeworkHomeworkAttach:FinalDesignReportEWG.doc Attach:FinalBatPresentationEWG.ppt LabsEffective Height for Wall Sensor Problem:To determine the height at which a the wall sensor detects a wall. Hypothesis:If we increase the height of the wall in increments of .5 cm, we can measure when the wall sensor detects said wall. Materials: iRobot Create Computer w/ Realterm installed Procedure: Set up the Create to receive OI commands, and be in Safe mode. 128 131 Prepare the command that will send the state and strength of the wall sensor. 149 2 8 27 Measure the height of the create, from a hard ground to the top edge on one side. Place the create on a vertically moving platform parallel to the wall with its right side touching the wall. Start the wall at the bottom of the Create send the already prepped command. Move the Create down in .5 cm increments, making the wall increase in increments of .5 cm. Take two recordings for each position. Data: see attached data sheet Note: will the range for the strength goes to 4096, the wood I tested it on has a max around 150 Conclusion The wall sensor will only detect walls if they are at least 5.5 cm above the ground. It doesnt seem to detect walls any smaller than that. This experiment could have been better if I had used a better material for my wall, like plaster of concrete. The wood doesnt seem to give off a very strong signal. I also ran into the problem that slightly below 5.5 cm, the state of the sensor would return a value of zero, despite the fact that it had the same strength as an earlier value that returned a one for the state.
Hey guys, I'll print out extra data sheets |