LAB.2 - Sonic sensor system

Date: 9/9-2010
Duration of activity: 11:15 - 14:10
Group members participating: All
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Schedule for the day:
-Fix computer problem on Amos's computer
-Install on MTKaalund computer to see if that works
-Connect to sonic sensor and get some testreadings
-Make program that stops the Car when about 10 cm from the wall - driwing directly into it
-Build the wall follower system

Problems and progress:
- The compiling and uploading only works on MTKaalund computer for now
- Test readings of taken with a cardboard from the box and coffe pot
- measurements taken directly in front and from an angle
- Max and min distances measured
- Tracker.java installed. car stop at at distance of about 30cm from the object. but it is clear that the step size or the updating of motor and position makes it inacurate and therefore it constantly moves back and fourth
improved by increasing update speed
- Tried changing power step size to motor but then it stops and cannot deliver enought power to drive itself


Results of sensor measurement:
- directly in front, cardboard hitting ligth sensor; Value 15
- directly in front, 30cm; value 42
- an angle of 45, 30 cm; value 40
- when using cylinder object at >30cm, miss reading accour
- Max målt ved 235 cm direkte hvor value var ca 240 men ustabilt

Final Status:
- NXT now functions
- stil missing wall tracker assignment, will be implementet before next lecture