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Accelerometer output to tilt angle conversion?

Question asked by Bob Li on Oct 20, 2011
Latest reply on Oct 21, 2011 by Bob Li

Hi,

 

For accelerometers such as MMA7660, by reading registers {XOUT, YOUT, ZOUT} the digital output can be immediately obtained.

 

However, how to convert these outputs into tilt angles? Namely, what is the relationship between physical tilt angle against the gravity/perpendicular axis, and the sensor’s {XOUT, YOUT, ZOUT} readouts?

 

It should in general be non-linear. Then what is the formula for conversion? Could Freescale provide some help on this?

 

 

 

Bob

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