accelerometer selection

[ssylee]

I would like to have some inputs on how I should select an accelerometer that would help me measure an object's inclination with the ground (still unsure about the range of inclination that it has to be capable of measuring). Thanks.

 

[dknguyen]

I would like to have some inputs on how I should select an accelerometer that would help me measure an object's inclination with the ground (still unsure about the range of inclination that it has to be capable of measuring). Thanks.

Assuming the thing is static when measuring incline (if it's moving it gets very difficult to measure incline with just an accelerometer).

Don't worry about the range of inclination...as long as each axis can measure up to the planet's gravity, it will be fine. THere are no limits to the range of inclination it can measure due to the way it works. YOu need at least 2 axis.

If you get 3 axis, and they are all matched relative to one another (ie. they all are a part of the same silicon and IC), then you can get rid of magnitude errors due to variations in gravity by just calculating the vector of gravity and look at it's direciton- ignore the magnitudes since they may or may not be off, but their relative magnitudes will be correct.