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Help with accelerometer

  1. Nov 9, 2009 #1
    What I am trying to do:
    I am placing my accelerometer [parallax BS2] ontop of my amigobot. I move the amigobot 1 meter foward with the acceleromter ontop while taking data for x and y direction. I then read the data to my computer and plot it.

    Data:
    The plot shows the data jumping up and down as time increasing and then it begins to decrease until it hits 0 again.

    What I know :
    Acceleration in this case should be like a trapezoid going up based on the increase in velocity and then reaching a constsant velocity(accell is 0) and then coming back down to 0 when the amigobot reaches 1 Meter. It would be pretty difficult to integrate the area underneath this because it looks like there is alot of noise invlove and that could be affecting it.

    Issue: I am not sure why my data is jumping up and down. I never used an accelerometer before so this is proving the text book stuff right but I am not in this situation I am having.

    Thank you if anyone can help.
     
  2. jcsd
  3. Nov 9, 2009 #2

    A.T.

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    Science Advisor
    Gold Member

    So it accelerates, decelerates and ends up at zero acceleration? Isn't that how you move it?

    So first it should be 0 and then come down to 0?
     
  4. Nov 9, 2009 #3
    Here is my data if it helps. I am just concerned about the up and down. I did an initial without movement and then 3 runs.(from starting at 0 to 1 meter)
     

    Attached Files:

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