SYSTEM AND METHOD FOR DETERMINING AT LEAST ONE PARAMETER RELATING TO AN ANGULAR MOVEMENT OF AN ARBOR

• Main Authors: ZANESCO, Vittorio, TORTORA, Pierpasquale
• Format: Patent
• Language: English
• Published: 25.06.2020
• Subjects: HOROLOGY; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; MEASURING; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; MECHANICALLY-DRIVEN CLOCKS OR WATCHES; PHYSICS; TESTING; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS

A system and method to determine an angular movement of an arbor integral with a crown of a watch, the arbor being rotatable in a longitudinal direction. Included is a rotating reflector mounted on the arbor, and two emitter/detector pairs disposed on either side of the reflector. Each emitter/detector pair includes a light source for illuminating the reflector, and a light detector for receiving the light reflected on the reflector and for generating an electrical signal representative of the reflected light. A processor processes the electrical signals and determine a parameter relating to the angular movement of the arbor. The rotating reflector's visible outer surface changes when the reflector rotates on itself in a regular manner, such that the representative electrical signal generated by said detector of the pair has a substantially sinusoidal shape when the reflector rotates on itself in a regular manner in a same direction of rotation.