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Acceleration to Velocity by area integration

  1. Apr 25, 2014 #1
    I know this has been asked many times.
    I am integrating acceleration data from MEMS accelerometer to get velocity.

    I found an app note by freescale - http://cache.freescale.com/files/sensors/doc/app_note/AN3397.pdf

    It ignores the sampling time to calculate the area.
    The formula should be sample: Vx= V(x-1)+[N-(N-1) * T]. Right?
    But the app note it is -
    Vx = V(x-1)+N+[((N-(N-1))/2]

    V(x-1) is the previous integration result.
     
  2. jcsd
  3. Apr 25, 2014 #2

    Simon Bridge

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    ... you still have to multiply by time somewhere.

    ... nonsense: did you misplace a parenthesis?

    N+[((N-(N-1))/2]=N+1/2
     
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