Acceleration to Velocity by area integration

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SUMMARY

The discussion focuses on integrating acceleration data from MEMS accelerometers to derive velocity. A specific application note from Freescale, AN3397, is referenced, which presents a formula for calculating velocity that neglects the sampling time. The correct formula for velocity integration should include the sampling time, as indicated by the user. The user critiques the formula provided in the app note, suggesting it is flawed due to misplaced parentheses.

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  • Review Freescale application note AN3397 for detailed insights on accelerometer integration
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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.
 
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It ignores the sampling time to calculate the area.
... you still have to multiply by time somewhere.

N+[((N-(N-1))/2]
... nonsense: did you misplace a parenthesis?

N+[((N-(N-1))/2]=N+1/2
 

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