Detection of a rotation of a magnet in a user-borne device with a plurality of magnetometers

A user-borne device, comprising:

• a housing,
• a magnetic object coupled to the housing, wherein the magnetic object has a magnetization direction,
• wherein the magnetic object is configured to create a magnetic field associated with the magnetization direction,
• wherein the magnetization direction is oriented with respect to the magnetic object such that a rotation of the magnetic object about a first rotation axis, a second rotation axis and a third rotation axis is detectable based on magnetic field measurements with a plurality of magnetometers,
• wherein the first rotation axis, the second rotation axis and the third rotation axis are orthogonal with respect to each other, and
• wherein the user-borne device is configured to detect at least one trigger event based on a rotation of the magnetic object about the first rotation axis, the second rotation axis and/or the third rotation axis.