NeuLog NUL-227 Guia Del Usuario página 19

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Sensor's orientation
The NeuLog acceleration sensor (an accelerometer)
measures static acceleration due to gravity and
dynamic acceleration due to the sensor's motion. By
measuring static acceleration, one can find out the
angle the sensor is tilted with respect to the Earth. By
measuring dynamic acceleration, one can find out how
the velocity of the sensor changes with time.
When the sensor is not moving and is facing upwards,
2
the reading is 9.8 m/s (because it includes static
acceleration). When the sensor is at free fall and is
2
facing upwards, the reading is 0 m/s . If we are
interested only in the vertical axis (Z axis) and in the
2
dynamic acceleration, we can subtract 9.8 m/s from the
readings and get 0 m/s2 when the sensor is not in
2
motion and -9.8 m/s when the sensor is at free fall.
The NeuLog acceleration sensor has the ability to
measure acceleration in three different axes (X, Y and Z).
The figure below demonstrates the axes.
V2018.01 English