Device operating method, system, and device

A wrist-worn device, comprising a micro control unit, a distance sensor and a rotating shaft arranged on a side surface of the wrist-worn device,

• wherein an outer circumferential surface of the rotating shaft is provided with a plurality of protrusions, and the rotating shaft is parallel to the side surface of the wrist-worn device or parallel to a tangent plane of the side surface of the wrist-worn device,
• wherein the distance sensor is configured to collect distance data and send the distance data to the micro control unit, and the distance data comprises a distance between the distance sensor and the rotating shaft,
• wherein the micro control unit is configured to obtain distance changing information on a distance between the distance sensor and the rotating shaft during a preset time according to the distance data, and determine a rotation angle of the rotating shaft according to the distance changing information on the distance, and
• wherein the micro control unit is also configured to determine whether the rotation angle is greater than a preset value, if the rotation angle is greater than the preset value, responds to an event that the rotating shaft is triggered, and if the rotation angle is less than or equal to the preset value, it is determined that the touch on rotating shaft is false triggering, and no response to the event that the rotating shaft is triggered.