EP0427077A1 - Elektronisches Uhrwerk - Google Patents
Elektronisches Uhrwerk Download PDFInfo
- Publication number
- EP0427077A1 EP0427077A1 EP90120671A EP90120671A EP0427077A1 EP 0427077 A1 EP0427077 A1 EP 0427077A1 EP 90120671 A EP90120671 A EP 90120671A EP 90120671 A EP90120671 A EP 90120671A EP 0427077 A1 EP0427077 A1 EP 0427077A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- timepiece
- time base
- signal
- output
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001131 transforming effect Effects 0.000 claims description 2
- 230000005764 inhibitory process Effects 0.000 description 31
- 238000005259 measurement Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 10
- 239000010453 quartz Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 230000005021 gait Effects 0.000 description 6
- 238000012937 correction Methods 0.000 description 5
- 240000008042 Zea mays Species 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
- G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
- G04D7/12—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard
- G04D7/1207—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard only for measuring
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G3/00—Producing timing pulses
- G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
- G04G3/027—Circuits for deriving low frequency timing pulses from pulses of higher frequency by combining pulse-trains of different frequencies, e.g. obtained from two independent oscillators or from a common oscillator by means of different frequency dividing ratios
Definitions
- the invention relates to an electronic timepiece, the running of which can be controlled by a measurement system, such as those fitted to watch production lines or those currently available to watchmakers and jewelers.
- Electronic timepieces such as watches, are generally provided with a time base comprising a quartz resonator capable of supplying, in the most stable manner possible, a signal whose frequency is divided, the divided signal being transmitted, in the case of an analog electronic watch, to a stepping motor which controls time indicators (hands, calendar), while this signal is transmitted in the case of a digital watch to a circuit which generally controls a liquid crystal display device.
- a time base comprising a quartz resonator capable of supplying, in the most stable manner possible, a signal whose frequency is divided, the divided signal being transmitted, in the case of an analog electronic watch, to a stepping motor which controls time indicators (hands, calendar), while this signal is transmitted in the case of a digital watch to a circuit which generally controls a liquid crystal display device.
- the inhibition therefore consists in removing from the time base signal a number K of pulses every T seconds, T being the inhibition period.
- a relatively large inhibition period T is chosen, generally between 480 and 640 seconds, or between 8 and a little more than 10 minutes.
- timepieces are checked at the manufacturing stage.
- This control which is carried out by a measurement called gait measurement must, to minimize the costs, be carried out over the shortest possible period M, the duration of which generally does not exceed one minute, that is to say a much shorter time than the above inhibition period.
- quartz provides a signal which varies over time.
- watchmakers have at their disposal a measuring device which, by an acoustic reception process or by magnetic detection, monitors the progress of timepieces that their customers entrust to them for this purpose.
- the timepiece 1 to be checked is placed on a device 2 which indicates by a display means 3 if the running of the watch is good or if, on the contrary, it has any deviation.
- this type of device available to watchmakers is designed to operate, for each measurement, over a period M of the order of a minute.
- the first measurement MS1 represented in FIG. 2a is launched at time T1 and is stopped at time T2.
- the measurement period M being eight to ten times shorter than the inhibition period T (this scale not being observed in the drawings), it can be seen that the inhibition could not have taken place, so that despite l existence of a correction at the level of the signal supplied by the time base, there remains between the corrected signal Sinh and the nominal signal Sn an error Na, corresponding to a number of pulses transmitted in excess.
- the inhibition occurs during the measurement period M so that the signal Sinh is deficient in a number Nb of pulses.
- the measurement of the gait can turn out to be completely false since the period M over which the measurement is carried out is much shorter than the period inhibition T.
- the display means are supplied, during this measurement, on the basis of an output signal, either too corrected or not enough, this since, as shown in FIG. 2a, the inhibition in one case could not be realized, or on the contrary in another case as shown in Figure 2b, just to realize it induces the transmission of an over-corrected signal.
- a timepiece in which there are means of adjustment which, with a periodicity of 640 seconds, adjust the frequency of the control signal of the display means of this part (these display means being constituted inter alia by the motor) in order to compensate for the frequency differences of the time base which are caused in particular by temperature variations .
- This timepiece also includes means making it possible to reduce the periodicity of the adjustment, and this in view of ensuring frequency control of the time base which is not of too long duration.
- These means include a ring oscillator which is capable of providing a signal of a relatively high frequency (greater than 2.1 MHz) and which is connected to the motor control circuit by means of a counting circuit. - even connected to an arithmetic and logic circuit coupled to a temperature measurement circuit.
- This arrangement makes it possible to replace, during a control, the pulses normally applied to the motor, by control pulses repeating with a reduced periodicity (of 10 seconds) compared to the periodicity of the running correction in normal operation.
- the ring oscillator which has, by construction, an unstable frequency, is controlled by comparison with the frequency of the time base oscillator then the periodicity of the control pulses is adjusted, by the arithmetic circuit and logical, as a function of the deviation of the oscillation of the time base caused by temperature variations.
- the control pulses which then take into account the influence of the gait adjustment can then be detected by a measuring device installed for example at the retailer responsible for after-sales service.
- this assembly must necessarily include a complex calculation circuit which risks introducing errors, precisely when it is desired to check the correct functioning of the timepiece. In addition to its high cost, this assembly therefore has the drawback of not ensuring reliable control of the running of the watch. Finally, during the check, this assembly necessarily prevents the exact time of the timepiece from being kept.
- the object of the invention is to provide a timepiece comprising a simple and reliable circuit allowing easy control of the movement of a timepiece provided with an adjustment device by inhibition or by adding a pulse, while offering the possibility of keeping the exact time.
- a timepiece comprising: - a time base intended to supply an output signal whose frequency is a time reference, - time display means connected to this time base via a division chain which is capable of transforming the output signal supplied by the time base into a signal whose divided frequency is adapted to said display means, adjustment means connected to said division chain for adjusting the deviations between the frequency of said output signal and an ideal nominal frequency over a predetermined periodicity, and - Generator means intended, for the control of the running of said timepiece, to generate an auxiliary signal of frequency clearly greater than the frequency of said output signal, this timepiece being characterized in that said generator means comprise servo means for slaving the frequency of said auxiliary signal to that of the time base signal, and in that these generating means are arranged to be selectively connected to the junction between said time base and said division chain for shorten, during the gait control, said predetermined adjustment period.
- control device by comparison between these signals, must be able to determine whether the number of inhibitions present has been properly programmed.
- This control method therefore requires a very specific device and does not meet the purpose set here.
- This timepiece includes a time base G which is provided with an oscillator 10 controlled by a quartz resonator 12 and which is capable of supplying an output signal Se with a frequency of 32,768 Hz.
- a first division chain 14 which receives from this time base G the output signal Se.
- the division chain 14 has a division rate D equal to 32,768 and it is linked to a TAF display means which is sensitive to a signal divided into frequency Sd, emitted by this division chain.
- the TAF display means comprises for example, in the case of an analog electronic timepiece, a stepping motor coupled to a gear train driving the hands.
- a stepping motor coupled to a gear train driving the hands.
- it can be formed, in the case of a digital electronic timepiece, by a microprocessor associated with a display of the liquid crystal type.
- the display means TAF processes and transforms into a time indication the signal Sd transmitted by the first division chain 14, the signal Sd having a frequency of 1 Hz.
- the timepiece of Figure 4 further includes an adjustment system 16 of the output signal Se.
- the adjustment system 16 acts by a correction process on the division chain 14.
- a correction process by inhibition it being understood that the invention can be '' apply indifferently to the technique of adding pulses.
- a second division chain 18 At the output of the first division chain 14 is connected a second division chain 18.
- This second division chain 18 which belongs to the adjustment system 16 consists of two dividers 18a and 18b.
- the first divider 18a which is connected to the input of the second 18b has a division rate with a value N for example equal to 48, while the second divider 18b has a division rate U for example equal to 10.
- the adjustment system 16 conventionally operates, in normal use mode, over an inhibition period T of 480 seconds.
- the timepiece comprises generator means 20 which, when they operate in the control mode and as will be explained below, allow efficient and error-free verification of the progress of the timepiece.
- generator means 20 comprise at least one phase comparator 22 and a variable frequency oscillator 24 which is preferably of the voltage controllable type.
- the power supply terminal of the variable frequency oscillator 24 is connectable to the power supply V + of the timepiece by means of a switch 31 provided between said power supply and the terminal d supply of this oscillator 24.
- One of the inputs of the phase comparator 22 is connectable to the output of the time base G by means of a switch 30 which is arranged between the output of the time base G and the input of the phase comparator 22.
- phase comparator 22 Since the other input of the phase comparator 22 is connected to the output of the variable frequency oscillator 24, the frequency of which is controlled by the comparator 22, this arrangement forms a means for controlling the generator means 20 at the time base. G.
- the generator means 20 are capable of supplying an auxiliary signal Sr (FIG. 5) whose frequency can be controlled by the frequency of the output signal Se of the time base G.
- a switch 32 is provided at the junction 28 between the time base G and the frequency divider 14.
- the common terminal of this switch 32 which forms the output terminal is therefore connected to the input of the division chain 14, while one of its input terminals is connected to the output of the time base G and the other is connected to the output of the variable frequency oscillator 24.
- the switches 30, 31 and the switch 32 form actuation means arranged so that they simultaneously allow the supply of the generator means 20 and the connection of these generator means 20, on the one hand at the outlet of the base of time G in view of their enslavement, and on the other hand at the entry of the chain of division 14.
- actuating means are moreover arranged so that when one acts on a member of the timepiece which is externally accessible, such as for example the rod and the crown 4 (FIG. 3), these actuating means are in their active (switches 31, 30) or switched (switch 32) position.
- a divider 26 is provided between the output of the variable frequency oscillator 24, after its junction with the switch 28, and the input of the frequency comparator 22.
- This divider 26 having a division rate P, it is therefore understood that the signal Sr which will be supplied by the generator means 20, during the control, may have a frequency P times higher than that of the output signal Se supplied by the base of time G.
- the common terminal 36a of this switch which here forms an output terminal, is connected to the input of the display means TAF.
- the other terminal 36c is connected to the output of the first divider 18a of the division chain 18, this chain managing the operating frequency of the adjustment system 16.
- the display means TAF can be selectively connected, either to the input or to the output of the divider 18a.
- the division rate P of the divider 26 is chosen equal to the division rate N of the divider 18a.
- the timepiece according to the invention can be provided with a divider 40 with a division rate Q, connected between the output of the time base G and the common junction of the switch 30 and switch 32.
- This divider 40 makes it possible to decrease by Q times the frequency of the signal Sr supplied by the generator means 20, the division rate of the division chain 14 being, therefore, equal to D / Q.
- a signal is provided at the input of the phase comparator 22, the duty cycle of which is that of a square signal, which makes it possible to use a phase comparator of simplified construction.
- the operation of the timepiece according to the invention is as follows.
- the rod When using the timepiece in normal operating mode, the rod by means of its crown 4 (FIG. 3) is in its pushed position or simply pulled up to its reset notch. time or date movement, so that the switches 31, 30 and the switches 32, 36 are left in the position shown in FIG. 4.
- the generator means 20 are not supplied and the time base G delivers to the division chain 14 its output signal Se.
- the display means TAF is connected directly to the output of the division chain 14 from which the signal Sd comes.
- the motor advances by one step every second and, via the hands, provides the normal time indication.
- the division rate of the division chain 18 being equal to N x U, ie 480, the inhibition by the adjustment system 16 is repeated over a periodicity of 480 seconds.
- the time base G being connected to the generator means 20, and more particularly to the phase comparator 22, the frequency of the generator means 20 is controlled by that of the time base G.
- switches 32 and 36 are in their switched position.
- the input of the division chain 14 is no longer connected to the output of the time base G, but to that of the generator means 20.
- the generating means 20 therefore supply the division chain 14 with the auxiliary signal Sr which is a signal P times faster than the signal Se.
- the display means TAF is now connected to the output of the divider 18a, and since the division rate N of this divider is preferably chosen equal to that (P) of the divider 26, the signal Sd is found, which has a frequency of 1 Hz, at the output of the divider 18a.
- the signal at the output of the division chain 14 has a frequency of the same P times higher (originally 1 Hz and now 48 Hz) and as the value P is equal to the value N, we find at the output from the divider 18a a signal of a frequency N times reduced, that is to say again equal to 1 HZ (that is to say the signal Sd).
- the display means TAF being connected at this point, it functions as when it is used in normal mode, and the motor which advances by one step per second provides the control device 2 with detectable information.
- This information is processed by this device which indicates to the controller or the watchmaker via a display means 3, whether the running of the watch is correct or not.
- the periodicity T of the adjustment is therefore reduced.
- This inhibition is therefore always launched every 480 pulses received from the output signal of the division chain 14, but since this signal is faster (48 times) the time between these pulses is reduced and the inhibition period (measurement relative to time and not with respect to the number of pulses) is correspondingly shortened.
- the timepiece comprises generator means which are provided with servo means for slaving the frequency of the auxiliary signal Sr to that of the signal Se supplied by the time base G
- the generating means are arranged to be selectively connected to the junction between the time base G and the division chain 14 in order to shorten, during the control of the walk, the periodicity of adjustment, it is possible perform a reliable and error-free measurement without losing the time provided by the timepiece.
- this device would be entirely satisfactory even if the switch 36 were omitted. This would require the possibility of setting the control device 2 on a control frequency P times higher and then reset the timepiece, which of course is not an optimal solution.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Developing Agents For Electrophotography (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Liquid Crystal Substances (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH4054/89A CH677577B5 (de) | 1989-11-10 | 1989-11-10 | |
CH4054/89 | 1989-11-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0427077A1 true EP0427077A1 (de) | 1991-05-15 |
EP0427077B1 EP0427077B1 (de) | 1993-03-03 |
Family
ID=4268958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90120671A Expired - Lifetime EP0427077B1 (de) | 1989-11-10 | 1990-10-29 | Elektronisches Uhrwerk |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0427077B1 (de) |
JP (1) | JP3066605B2 (de) |
CH (1) | CH677577B5 (de) |
DE (1) | DE69001009T2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1016869A2 (de) * | 1998-12-28 | 2000-07-05 | Nippon Kouatsu Electric Co., Ltd | Système de localisation de défaut |
EP3168695A1 (de) * | 2015-11-13 | 2017-05-17 | ETA SA Manufacture Horlogère Suisse | Testverfahren für ganggenauigkeit einer quartzuhr |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2043967A (en) * | 1978-12-27 | 1980-10-08 | Citizen Watch Co Ltd | Testing electronic timepieces |
US4241435A (en) * | 1978-10-06 | 1980-12-23 | Citizen Watch Co., Ltd. | Electronic timepiece oscillator circuit |
EP0069372A1 (de) * | 1981-07-06 | 1983-01-12 | OMEGA Louis Brandt & Frère S.A. | Verfahren zur Steuerung des Ganges einer Uhr und Uhr nach diesem Verfahren |
US4408897A (en) * | 1982-09-22 | 1983-10-11 | Ebauches Electroniques S.A. | Electronic timepiece having a digital frequency correction circuit |
-
1989
- 1989-11-10 CH CH4054/89A patent/CH677577B5/fr not_active IP Right Cessation
-
1990
- 1990-10-29 DE DE90120671T patent/DE69001009T2/de not_active Expired - Fee Related
- 1990-10-29 EP EP90120671A patent/EP0427077B1/de not_active Expired - Lifetime
- 1990-11-09 JP JP2302792A patent/JP3066605B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4241435A (en) * | 1978-10-06 | 1980-12-23 | Citizen Watch Co., Ltd. | Electronic timepiece oscillator circuit |
GB2043967A (en) * | 1978-12-27 | 1980-10-08 | Citizen Watch Co Ltd | Testing electronic timepieces |
EP0069372A1 (de) * | 1981-07-06 | 1983-01-12 | OMEGA Louis Brandt & Frère S.A. | Verfahren zur Steuerung des Ganges einer Uhr und Uhr nach diesem Verfahren |
US4408897A (en) * | 1982-09-22 | 1983-10-11 | Ebauches Electroniques S.A. | Electronic timepiece having a digital frequency correction circuit |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1016869A2 (de) * | 1998-12-28 | 2000-07-05 | Nippon Kouatsu Electric Co., Ltd | Système de localisation de défaut |
EP1016869A3 (de) * | 1998-12-28 | 2000-12-27 | Nippon Kouatsu Electric Co., Ltd | Système de localisation de défaut |
US6597180B1 (en) | 1998-12-28 | 2003-07-22 | Nippon Kouatsu Electric Co., Ltd. | Fault point location system |
AU769346B2 (en) * | 1998-12-28 | 2004-01-22 | Motokuni Takaoka | Fault point location system |
EP3168695A1 (de) * | 2015-11-13 | 2017-05-17 | ETA SA Manufacture Horlogère Suisse | Testverfahren für ganggenauigkeit einer quartzuhr |
CN107015471A (zh) * | 2015-11-13 | 2017-08-04 | Eta瑞士钟表制造股份有限公司 | 石英手表的日差率的测试方法 |
US10295962B2 (en) | 2015-11-13 | 2019-05-21 | Eta Sa Manufacture Horlogere Suisse | Method for testing the rate of a quartz watch |
CN107015471B (zh) * | 2015-11-13 | 2020-06-30 | Eta瑞士钟表制造股份有限公司 | 石英手表的日差率的测试方法 |
Also Published As
Publication number | Publication date |
---|---|
CH677577GA3 (de) | 1991-06-14 |
JPH03172791A (ja) | 1991-07-26 |
JP3066605B2 (ja) | 2000-07-17 |
EP0427077B1 (de) | 1993-03-03 |
DE69001009T2 (de) | 1993-09-30 |
CH677577B5 (de) | 1991-12-13 |
DE69001009D1 (de) | 1993-04-08 |
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