Title:
METHOD FOR TESTING SPEED OF QUARTZ WATCH
Document Type and Number:
Japanese Patent JP2017090462
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for testing a speed or an operation of an electronic watch such as a quartz watch.SOLUTION: A method for testing a speed of an electronic watch having a time base device (1) includes three main steps for testing on a testing machine. The time base device includes at least one watch module (2) having a resonator (3) connected to a vibrator of an electronic circuit (4). The electronic circuit (4) is followed by a divider circuit. The divider circuit is controlled by a prohibition circuit and provides a divided timing signal to a motor. In a first step, the measurement consists of measuring a frequency of a vibrator reference signal at least in a measurement period having no prohibition. A second step is provided for the purpose of acquiring the present prohibition value in order to prohibit a certain number of clock pulses and in order to determine a prohibition value in a continued prohibition period. Lastly, a third step is provided for the purpose of calculating the frequency corresponding to the watch.SELECTED DRAWING: Figure 1
Inventors:
FRANCOIS KLOPFENSTEIN
YVES GODAT
NICOLAS JEANNET
YVES GODAT
NICOLAS JEANNET
Application Number:
JP2016220226A
Publication Date:
May 25, 2017
Filing Date:
November 11, 2016
Export Citation:
Assignee:
ETA SA MFT HORLOGERE SUISSE
International Classes:
G04G3/02; G04C3/14; G04D7/12
Domestic Patent References:
| JPH03172791A | 1991-07-26 | |||
| JPH08265043A | 1996-10-11 | |||
| JP3558040B2 | 2004-08-25 | |||
| JPS6329291A | 1988-02-06 |
Foreign References:
| CH707285A2 | 2014-05-30 |
Attorney, Agent or Firm:
Shigeki Yamakawa
Masaki Yamakawa
Masaki Yamakawa