LibMuse 6.0.2
com.choosemuse.libmuse.Accelerometer Enum Reference

Public Attributes

 X
 
 Y
 
 Z
 
 FORWARD_BACKWARD
 
 UP_DOWN
 
 LEFT_RIGHT
 

Detailed Description

Represents the data mapping in an Accelerometer data packet.

The accelerometer data is measured on 3 axes as shown in the picture below:

MuseAxesAcc.png

The axes are oriented to a Right Hand Coordinate System along the headband axes. Values are given in g (9.81 m/s^2) and are negated to align with the orientation of the headband in Earth's gravitational field. This convention is described in more detail in the following application note: https://www.nxp.com/files/sensors/doc/app_note/AN3461.pdf
Values along the X axis increase as the head tilts down aligning the X axis with the downward force of gravity. Negative values indicate a tilt upwards.
Values along the Y axis increase as the head tilts to the right. Negative values indicate a tilt to the left.
When worn on a level head, or held in the level position shown in the figure above, the net acceleration of the device will only be caused from gravity. It will be in the direction of the ground aligned with the Z axis. This will give a_x =0, a_y = 0 and a_z = 1 g. As the headband tilts out of this orientation, the value of Z will decrease. -1 in Z represents a headband that is upside down.

See also
MuseDataPacketType.ACCELEROMETER
MuseDataPacket.getAccelerometerValue()

Member Data Documentation

§ FORWARD_BACKWARD

com.choosemuse.libmuse.Accelerometer.FORWARD_BACKWARD

Orientation of the Forward/Backward axis relative to gravity in g. Positive values indicate a tilt down.

Deprecated:
Use Accelerometer.X instead.

§ LEFT_RIGHT

com.choosemuse.libmuse.Accelerometer.LEFT_RIGHT

Orientation of the Left/Right axis relative to gravity in g. Positive values indicate a tilt to the left.

Deprecated:
Use Accelerometer.Y instead. instead.

§ UP_DOWN

com.choosemuse.libmuse.Accelerometer.UP_DOWN

Orientation of the Up/Down axis relative to gravity in g. Positive values indicate acceleration up.

Deprecated:
Use Accelerometer.Z instead.

§ X

com.choosemuse.libmuse.Accelerometer.X

Orientation of the X axis relative to gravity in g. Values along the X axis increase as the head tilts down. Negative values indicate a tilt up.

§ Y

com.choosemuse.libmuse.Accelerometer.Y

Orientation of the Y axis relative to gravity in g. Values along the Y axis increase as the head tilts to the right. Negative values indicate a tilt to the left.

§ Z

com.choosemuse.libmuse.Accelerometer.Z

Orientation of the Z axis relative to gravity in g.


The documentation for this enum was generated from the following file: