EP2936254B1 - Thermokompensierter chronometersschaltkreis - Google Patents

Thermokompensierter chronometersschaltkreis Download PDF

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Publication number
EP2936254B1
EP2936254B1 EP13802669.5A EP13802669A EP2936254B1 EP 2936254 B1 EP2936254 B1 EP 2936254B1 EP 13802669 A EP13802669 A EP 13802669A EP 2936254 B1 EP2936254 B1 EP 2936254B1
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EP
European Patent Office
Prior art keywords
circuit
module
time base
clock
signal
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.)
Active
Application number
EP13802669.5A
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English (en)
French (fr)
Other versions
EP2936254A1 (de
Inventor
Thierry Bonnet
Silvio Dalla Piazza
Laurent Christe
François Klopfenstein
Emmanuel Fleury
Yves Godat
Nicolas Jeannet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Publication date
Priority claimed from EP13161356.4A external-priority patent/EP2784605A1/de
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP13802669.5A priority Critical patent/EP2936254B1/de
Publication of EP2936254A1 publication Critical patent/EP2936254A1/de
Application granted granted Critical
Publication of EP2936254B1 publication Critical patent/EP2936254B1/de
Active legal-status Critical Current
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C13/00—Driving mechanisms for clocks by primary clocks
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/04—Temperature-compensating arrangements

Definitions

  • the present invention relates to an electronic watch comprising one or more electric motors for driving analog display means, a watch module comprising a time base supplying a clock signal connected to a divider circuit, said divider circuit supplying a reference signal sent to a control circuit arranged to control the electric motor (s).
  • a time base formed by a piezoelectric resonator, for example, such as a quartz resonator 1, or a silicon resonator of the MEMS type connected to the terminals of an oscillator 2 whose output is connected to a frequency divider circuit 3 for obtain the desired running frequency for the watch so as to indicate the exact time.
  • the output of the frequency divider circuit 3 is connected to a control circuit 4 of an electric motor 5 making it possible to drive the cogs, not shown here, rotating the analog display means, such as needles serving to supply the gear. indication of the time, ie hours, minutes and possibly seconds.
  • the resonator, the oscillator, the divider circuit and the control circuit are installed in the same box 6.
  • the documents EP 1 890 204 A1 and EP 2 169 479 A1 represent examples of this type of prior art.
  • Thermally compensated watch circuits are known. These circuits include a watch module connected to a quartz and also connected to a temperature measurement and correction circuit. This measurement and correction circuit is thus arranged to measure the temperature and to correct the operation of the watch circuit.
  • the documents GB 1,581,917 A US 2009/160569 A1 represent examples of this type of prior art.
  • the invention relates to an electronic watch which overcomes the aforementioned drawbacks of the prior art by providing a watch whose time display is reliable and precise and whose manufacturing cost is lower.
  • the invention relates to an electronic watch as defined in independent claim 1 as well as to a calibration method as defined in independent claim 8.
  • FIG. 2 Part of the invention is shown in the figure 2 .
  • an electronic timepiece comprising a watch circuit 10 provided with a watch module 12.
  • This watch module 12 comprises a time base 14 formed by a resonator 14a, for example piezoelectric, such as a quartz resonator, or else a MEMS type silicon resonator connected to the terminals of an oscillator 14b.
  • This oscillator 14b is used to supply a clock signal Sh at a clock frequency.
  • This clock frequency is generally 32768 Hz, conventionally called 32kHz. In the rest of the description, it will be understood that the term 32kHz refers to this value of 32768 Hz.
  • the output of the oscillator is connected to a frequency divider circuit 16 to obtain the desired running frequency for the watch so as to indicate the exact time.
  • the divider circuit 16 will output a frequency of 1 Hz so that the second hand can move one step per second.
  • the output of the frequency divider circuit 16 is connected to a control circuit 18.
  • This control circuit 18 is used in order to manage the clock module 12, that is to say to adjust the running of the timepiece and manage functions such as low battery mode. It will be understood that the control circuit 18, the time base 14 and the frequency divider circuit 16 can be in the form of the same component.
  • the watch circuit 10 is also provided with an electric motor M1 making it possible to drive the cogs, not shown here, rotating the analog display means, such as hands 22 serving to provide the time indication, ie hours, minutes and possibly seconds.
  • the electric motor is connected to the control circuit 18 which controls the operation of said electric motor M1.
  • control circuit 18, the time base 14 and the frequency divider circuit 16 are arranged in the same housing 13 and the clock circuit further comprises a measurement and correction circuit 26 allowing a thermo. compensation.
  • This measurement and correction circuit 26 is placed between the oscillator circuit 14b and the frequency divider circuit 16.
  • This measurement and correction circuit 26 is used to thermally compensate the watch module 12, that is to say that in depending on the temperature, it will act on the signal leaving oscillator 14b, that is to say the clock signal Sh.
  • the measuring and correction circuit 26 acts so that the signal leaving said measuring circuit and correction 26 is accurate on average over a defined period. For this, the measurement and correction circuit 26 inhibits pulses on the clock signal Sh.
  • the assembly formed of the time base 14 and of the measurement and correction circuit 26 supplies a signal Si, of which the frequency is lower than the frequency of the clock signal Sh. This is due to the fact that the measurement and correction circuit 26 inhibits pulses, that is to say that it suppresses pulses.
  • an 8192Hz frequency signal conventionally called 8 kHz thermo-compensated, that is to say precise and reliable, will be supplied by this assembly formed of the time base 14 and of the control circuit. measurement and correction 26.
  • the case 13 in which it is arranged is made of ceramic and is hermetically sealed before calibration.
  • the housing 13 is placed under vacuum and then closed. This ensures that humidity will not be able to infiltrate said case 13. Consequently, humidity will have no influence on the precision of the watch module 12.
  • one aspect of the invention consists in providing a calibration method making it possible to obtain a timepiece circuit 10 that is reliable over time.
  • the method consists in assembling the control circuit 18, the time base 14, the frequency divider circuit 16 and the measurement and correction circuit 26 in the same housing 13 in order to form the clock module 12. Then, the calibration is done in batch, that is to say in parallel. It will then be understood that a plurality of watchmaking modules 12 are calibrated at the same time. This calibration then consists in measuring the characteristics of the resonator 14a as well as of the measuring circuit 26 as a function of the temperature and then in determining the correction parameters.
  • correction parameters are stored in the measurement and correction circuit 26.
  • the correction parameters of each resonator 14a of a plurality of clock modules 12 are determined simultaneously.
  • This method then has the advantage of allowing the calibration of a large number of watchmaking modules 12 simultaneously and therefore of reducing the costs associated with this calibration.
  • thermo-compensated chronograph watchmaking module 30 makes it possible to simply produce a thermo-compensated chronograph watchmaking module 30 as visible at the bottom. figure 3 .
  • the present invention provides for using the clock signal of the watch module 12 to clock a chronograph module 30.
  • This chronograph module 30 comprises a control circuit and circuits making it possible to operate the hands of the chronograph function.
  • the control circuit of the chronograph module 30 is arranged to operate two motors M2 and M3. In this case, it is conceivable that there is no motor M1 connected to the clock module 12.
  • the chronograph module 30 is clocked with the thermo-compensated signal, that is to say the signal Si exiting from the measurement and correction circuit 26 of the watch module 12.
  • the thermo-compensated signal that is to say the signal Si exiting from the measurement and correction circuit 26 of the watch module 12.
  • a thermo-compensated signal Si of frequency 8 kHz is obtained.
  • the chronograph module 30 is a module which does not have its own time base, which reduces its cost.
  • thermo-compensated signal Si supplied by the watchmaking module 12 is used to reconstruct signals useful for the chronograph module 30.
  • the thermo-compensated signal can be used to reconstruct a signal at a higher frequency to clock a control circuit. of the chronograph module.
  • the chronograph module control circuit can operate the motors M2, M3 associated with this chronograph function.
  • the reconstructed higher frequency signal can be used for a function of determining the position of the cogs.
  • thermo-compensated chronograph watch module it makes it possible to produce a simple thermo-compensated chronograph watch module.
  • known chronograph watch modules directly use the signal at the output of the 32KHz resonator to operate.
  • the signal directly at the output of the resonator cannot be thermo-compensated.
  • the operation of the chronograph watch module becomes random.
  • thermo-compensated signal we avoids having to produce a chronograph module 30 comprising its own time base and its own measurement and correction circuit.
  • the present invention uses the single watch module 12 and its thermo-compensated signal Si of 8 kHz frequency to thermo-compensate the chronograph module 30 by ensuring that the thermo-compensated signal is used by said chronograph module. As a result, it is easy to switch from a watch module to a chronograph watch module.
  • the chronograph module uses a thermo-compensated clock signal with a frequency lower than the frequency of the time base 14.
  • the higher the frequency the greater the losses linked to the interconnection capacities.
  • the transport of a signal of a certain frequency on a printed circuit is subjected to the capacitive effects, inductive and to the effects of skin which can take place. These effects are all related to frequency implying an increase in losses related to these effects as a function of frequency. Therefore, to compensate for the losses, it is necessary to provide more electrical power.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Claims (10)

  1. Elektronische Uhr, umfassend eine Außenschale, in der wenigstens ein Elektromotor (M1) angeordnet ist, um analoge Anzeigemittel anzutreiben, ein Uhrenmodul (12), das eine Zeitbasis (14) umfasst, die ein Großuhrsignal (Sh) bereitstellt, und das mit einer Divisorschaltung (16) verbunden ist, wobei die Divisorschaltung ein Referenzsignal bereitstellt, das an eine Kontrollschaltung (18) gesendet wird, die angeordnet ist, um den Elektromotor zu kontrollieren, und wobei das Uhrenmodul (12) weiter eine Mess- und Korrekturschaltung (26) umfasst, die zwischen der Zeitbasis und der Divisorschaltung angeordnet ist und die ein thermokompensiertes Zwischensignal (Si) bereitstellt, wobei die Zeitbasis, die Mess- und Korrekturschaltung, die Divisorschaltung und die Kontrollschaltung in einer gleichen Innenschale (13) angeordnet sind, um das Uhrenmodul zu bilden, und wobei die Uhr weiter ein Chronographenmodul (30) umfasst, das mit dem Uhrenmodul (12) verbunden ist, wobei das Chronographenmodul direkt durch das thermokompensierte Zwischensignal (Si) des Uhrenmoduls getaktet wird.
  2. Elektronische Uhr nach Anspruch 1, dadurch gekennzeichnet, dass die Zeitbasis einen Resonator (14a) und eine Oszillatorschaltung (14b) umfasst.
  3. Elektronische Uhr nach Anspruch 1, dadurch gekennzeichnet, dass die Zeitbasis (14) ein Großuhrsignal mit 32 kHz bereitstellt.
  4. Elektronische Uhr nach Anspruch 1, dadurch gekennzeichnet, dass das Chronographenmodul (30) angeordnet ist, um wenigstens einen Elektromotor (M2, M3) zu verwalten.
  5. Elektronische Uhr nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Schale (13) des Uhrenmoduls hermetisch verschlossen ist.
  6. Elektronische Uhr nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Schale (13) des Uhrenmoduls (12) eine integrierte Schaltung ist, in der die Zeitbasis integriert ist.
  7. Elektronische Uhr nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Schale (13) des Uhrenmoduls aus Keramik hergestellt ist.
  8. Verfahren zur Kalibrierung wenigstens eines Uhrenmoduls (12), das eine Zeitbasis (14) umfasst, die ein Großuhrsignal (Sh) bereitstellt, und das mit einer Divisorschaltung (16) verbunden ist, wobei die Divisorschaltung ein Referenzsignal bereitstellt, das an eine Kontrollschaltung (18) gesendet wird, die angeordnet ist, um den Elektromotor zu kontrollieren, und wobei das Uhrenmodul weiter eine Mess- und Korrekturschaltung (26) umfasst, die zwischen der Zeitbasis und der Divisorschaltung angeordnet ist und die ein thermokompensiertes Zwischensignal (Si) bereitstellt, wobei das Verfahren folgende Schritte umfasst:
    - Zusammenbauen des Moduls (12), indem die Zeitbasis, die Divisorschaltung, die Kontrollschaltung und die Mess- und Korrekturschaltung (26) in einer Innenschale (13) zusammengebaut werden, dann indem diese Schale (13) verschlossen wird;
    - Messen der Charakteristika der Zeitbasis (14) in Abhängigkeit von der Temperatur;
    - Bestimmen von Korrekturparametern;
    - Speichern der Korrekturparameter in der Mess- und Korrekturschaltung (26);
    - Verbinden eines Chronographenmoduls (30) mit dem Uhrenmodul (12),
    - Takten des Chronographenmoduls (30) durch das kompensierte Zwischensignal (Si) des Uhrenmoduls.
  9. Verfahren zur Kalibrierung nach Anspruch 8, dadurch gekennzeichnet, dass die Schale (13) hermetisch unter Vakuum verschlossen wird.
  10. Verfahren zur Kalibrierung nach Anspruch 8, dadurch gekennzeichnet, dass eine Vielzahl von Uhrenmodulen 12) gleichzeitig kalibriert wird.
EP13802669.5A 2012-12-21 2013-12-11 Thermokompensierter chronometersschaltkreis Active EP2936254B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13802669.5A EP2936254B1 (de) 2012-12-21 2013-12-11 Thermokompensierter chronometersschaltkreis

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP12199274 2012-12-21
EP13161356.4A EP2784605A1 (de) 2013-03-27 2013-03-27 Thermokompensierter Schaltkreis mit Zeitschaltmechanismus
PCT/EP2013/076291 WO2014095538A1 (fr) 2012-12-21 2013-12-11 Circuit chronometre thermocompense
EP13802669.5A EP2936254B1 (de) 2012-12-21 2013-12-11 Thermokompensierter chronometersschaltkreis

Publications (2)

Publication Number Publication Date
EP2936254A1 EP2936254A1 (de) 2015-10-28
EP2936254B1 true EP2936254B1 (de) 2021-08-11

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EP13802669.5A Active EP2936254B1 (de) 2012-12-21 2013-12-11 Thermokompensierter chronometersschaltkreis

Country Status (6)

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US (1) US10274899B2 (de)
EP (1) EP2936254B1 (de)
JP (1) JP6328136B2 (de)
CN (1) CN104854519B (de)
TW (1) TWI612403B (de)
WO (1) WO2014095538A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3168695B1 (de) * 2015-11-13 2021-03-10 ETA SA Manufacture Horlogère Suisse Testverfahren für ganggenauigkeit einer quartzuhr
JP7463744B2 (ja) * 2020-01-30 2024-04-09 セイコーエプソン株式会社 時計

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Also Published As

Publication number Publication date
WO2014095538A1 (fr) 2014-06-26
JP6328136B2 (ja) 2018-05-23
CN104854519A (zh) 2015-08-19
HK1208918A1 (en) 2016-03-18
US20150316895A1 (en) 2015-11-05
TWI612403B (zh) 2018-01-21
US10274899B2 (en) 2019-04-30
EP2936254A1 (de) 2015-10-28
JP2015537226A (ja) 2015-12-24
TW201443589A (zh) 2014-11-16
CN104854519B (zh) 2017-08-04

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