I am using a LSM303DLHC accelerometer to measure vibration. I had thought I understood something … but now am not sure.
Assume the device is sitting still. The only physical impact on the device being the rotation of the earth (that is, ignoring my central AC, overhead fan, the cat …). Assuming the ‘steady state’ output values are all 0.0000 (I know it would not be, but for purpose of understanding …). If an object is dropped onto the surface where the device is, the outputs all begin to oscillate, going above and below 0.0 for a period of time until the vibration stops.
If this is the data for one of the axes is graphed like this …
Would it be correct to say that at time …
… N0 - the device was in its steady state position
… N1 - the device has been accelerating, physically moving in one direction
… N2 - the device has reached its peak acceleration - but NOT the farthest distance from its steady state position
… N3 - the device has begun to slow down, but is still moving in the same direction
… N4 - the device has stopped accelerating and has moved the farthest away from its steady state position
… N5 - the device begins to accelerate again and is moving in the opposite direction, back towards its original location
… N6 - the device has reached its peak acceleration
… N7 - the device has begun to slow down
… N8 - the device has stopped accelerating and is back to its original location
Would appreciate any feedback !