The cross sensitivity is an important value of acceleration sensors.
If a sensor with the measurement direction in X axis is accelerated in Y or Z direction, at best it should not measure any acceleration. The ratio between measured and applied acceleration in cross sensitive axis is the cross sensitivity.
The following pictures show the cross sensitivity and the sensitive axis in comparison. The compared measurements are
- constant frequency, constant acceleration measurement
- constant frequency measurement
- frequency response measurement (constant acceleration)
The cross sensitivity in worst case is < 8,88 %.
The picture below shows that the cross sensitivity of the optical sensor GS6500 acquired with the Bragg scope is < 8,88 %. This value is calculated by a measurement with a constant frequency of 300 Hz and a constant acceleration of 10g.
The picture below shows the cross sensitivity of the optical sensor GS6500 at a frequency of 120 Hz and an acceleration sweep from 1g to 50g which is about 2,77 %.
The picture below shows the cross sensitivity of the optical sensor GS6500 acquired with the Bragg Scope at a frequency response measurement with constant acceleration of 5g which is about 8 %.