Title:
心棒の角運動に関連する少なくとも１つのパラメータを決定するシステム及び方法
Document Type and Number:
Japanese Patent JP6970167
Kind Code:
B2
Abstract:
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.
Inventors:
Pierpa Squale Tortora
Vittorio Zenesco
Vittorio Zenesco
Application Number:
JP2019220112A
Publication Date:
November 24, 2021
Filing Date:
December 05, 2019
Export Citation:
Assignee:
The Swatch Group Research and Development Limited
International Classes:
G04G21/00; G01D5/36
Domestic Patent References:
| JP61080013A | ||||
| JP2005017011A | ||||
| JP62022512U |
Attorney, Agent or Firm:
Shigeki Yamakawa
Masaki Yamakawa
Masaki Yamakawa