Regarding Need to measure the rotation count of the Compass either by clockwise and anti clock wise from 0 to 360 degree

Question

Dear All,
Since I am new bee for labview, I want to count the no. of rotations that the compass will be rotating. I just did for one count, but I need to measure the count continuosly. Please some one to help me as soon as possible. Attached is me code. Please do the needful.
Thanks and Regards,
Dinsulpri
Attachments:
Compass Count.vi ‏10 KB

Answer 1

The event structure reads the value and, depending on its last state and current state, makes a decision.  You should try to look at the logic in the different states and follow what it happening.
Example -
1> Start at low state and 10 degrees
2> Control moves to 30 degrees.  Old state = low. New state = low (no change in count)
3> Control moves to 15 degrees.  Old state = low. New state = low (no change in count)
4> Control moves to 100 degrees.  Old state = low.  New state = medium (no change in count)
4> Control moves to 330 degrees.  Old state = medium.  New state = high (no change in count)
5> Control moves to 20 degrees.  Old state = high.  New state = low (going straight from high to low means we made a positive rotation. Increase count by 1)
The limits determine the zones of the low, medium, and high states.  While the values I choose to use were arbitrary, you would not want to set them too low (or high) to minimize errors.  Try it yourself.  Set the low limit to 2 and high limit to 358 (this would make the medium zone from 3 -> 357).  If you were quick (or the mouse jumped) it might be possible to move from 356 degrees (medium zone) to 4 degrees (also medium zone).  So if set improperly you could complete a rotation but not know you changed zones.
On retrospect though the best values would likely be in thirds (I.E., 120 and 240) to make the zones even?  I did not do too much testing.