EP0608733B1 - Montre radiopilotée autonome - Google Patents

Montre radiopilotée autonome Download PDF

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Publication number
EP0608733B1
EP0608733B1 EP94100550A EP94100550A EP0608733B1 EP 0608733 B1 EP0608733 B1 EP 0608733B1 EP 94100550 A EP94100550 A EP 94100550A EP 94100550 A EP94100550 A EP 94100550A EP 0608733 B1 EP0608733 B1 EP 0608733B1
Authority
EP
European Patent Office
Prior art keywords
time
receiver
switched
binary
coding
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.)
Expired - Lifetime
Application number
EP94100550A
Other languages
German (de)
English (en)
Other versions
EP0608733A2 (fr
EP0608733A3 (fr
Inventor
Wolfgang Ganter
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.)
Junghans Uhren GmbH
Original Assignee
Junghans Uhren GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Junghans Uhren GmbH filed Critical Junghans Uhren GmbH
Publication of EP0608733A2 publication Critical patent/EP0608733A2/fr
Publication of EP0608733A3 publication Critical patent/EP0608733A3/fr
Application granted granted Critical
Publication of EP0608733B1 publication Critical patent/EP0608733B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R20/00—Setting the time according to the time information carried or implied by the radio signal
    • G04R20/08—Setting the time according to the time information carried or implied by the radio signal the radio signal being broadcast from a long-wave call sign, e.g. DCF77, JJY40, JJY60, MSF60 or WWVB
    • G04R20/12—Decoding time data; Circuits therefor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R20/00—Setting the time according to the time information carried or implied by the radio signal
    • G04R20/08—Setting the time according to the time information carried or implied by the radio signal the radio signal being broadcast from a long-wave call sign, e.g. DCF77, JJY40, JJY60, MSF60 or WWVB
    • G04R20/10—Tuning or receiving; Circuits therefor

Definitions

  • the invention relates to an autonomous radio clock according to the preamble of claim 1.
  • the receiver of such a radio clock is described Temporarily switched on at larger, predefined intervals of typically one hour (in the case of wristwatches only at certain hours of the night) It remains switched on until at least one time telegram that is currently to be received could be decoded without error to the extent that was of interest (or until it was found that such undisturbed reception currently not possible is) and is then switched off again until the next fixed switch-on time (typically the next full hour) appears.
  • the successive switch-on times for the radio clock receiver in DE-A 31 44 321 are not fixed; but after each switch-on, the next switch-on time (hours or days later) is calculated from the currently displayed error message: the less the currently displayed time deviates from the currently decoded absolute time, the more accurate the autonomous watch mode is, the longer the period can be until the next time the receiver is switched on.
  • the receiver when the receiver is switched on, it remains in operation until at least one complete time telegram has been correctly decoded.
  • the receiver is only switched on from time to time for the duration of a time telegram to protect the power source (battery or solar cell memory), in order to obtain an absolute Obtaining time information and comparing it with the current time display in order to correct the latter if necessary.
  • the current consumption of the receiver could already be reduced to such an extent that even battery-operated radio-controlled wristwatches with sufficient runtime between two battery changes have become feasible in this operating mode.
  • DE-A-39 01 860 is not a generic autonomous radio-controlled clock and not even a time-controlled receiver activation, the receiver of which is operated continuously intermittently (that is, with successive short switch-on and switch-off sections). If the announcement of a message is detected at the moment of activation, the receiver remains in operation until the announcement of this message appears, in order to then be operated intermittently until the next announcement is received. Depending on the duty cycle, this saves up to half of the continuous operating energy during those variable periods within which no message can be received; but when the message is announced, the recipient stays on until the end of the message. Also from the summary of the Patent Abstracts of Japan Vol. 6, No.
  • the invention is based on the object of further reducing the energy requirement of the receiver of a generic radio clock, which is only switched on sporadically to receive complete time telegrams, in order to further extend the operating time of a battery or to operate the radio clock even from weaker power sources (such as electrical solar energy). Save) with an operating time sufficient for consumer watches.
  • the receiver which is anyway not switched on every minute, but only at larger (at least hourly) intervals, is no longer switched on for the duration of the reception of the respective total time telegram to be evaluated and is only switched off again after this, ie after receipt of the time telegram; it is switched off again and again during the reception of the coding periods in succession in the time telegram and only switched on again for the next bit.
  • the receiver is now switched on during the time telegram at the beginning of each coding period starting with the second and then immediately switched off again when it is certain that the data bit currently received from the current time telegram information is a binary logical ZERO or else acted a binary-logical ONE. If the current bit has been recognized (at the latest after 0.2 seconds), the receiver is switched off again for the rest (of at least 0.8 seconds) of the current coding second, although not all bits of the current telegram have been received at all; and for the next bit to be received, the receiver is switched on again at the beginning of the next coding period (second) until the next bit has been recognized after 0.2 seconds at the latest.
  • the receiver is now not only switched to ready for operation only at longer time intervals (for example, hourly or at certain night hours), but then actually only switched on temporarily in the rhythm of the time telegrams in the cycle of the coding periods. It is then switched off again as long as only the carrier which is no longer modulated with information is present for the rest of the coding period, so that the energy is saved for the longer rest of each coding period in which no information can be received anyway.
  • the radio clock 11 shown operates autonomously insofar as it is equipped with an internal time keeping 12 for the periodic activation of a driver circuit 13 for the time display 14. If this is an electromechanical display, then it contains a motor 15 for the display elements 16 (pointers or drop-down flaps), the instantaneous position of which can be determined via an interrogation device 17 which feeds an incremental or absolute position decoder 18. It delivers from time to time Time (usually hourly for wall or table clocks, usually only once or several times for wristwatches), a switch-on signal 19 to a switching stage 20 for the circuit breaker 21.
  • time Time usually hourly for wall or table clocks, usually only once or several times for wristwatches
  • a power source 22 (which is shown in the block diagram as a battery, in which there is but it can also be the memory which can be charged from a solar cell) and which operates the long-wave receiver 23 which is permanently tuned to at least one time transmitter.
  • the power source 22 supplies the operating energy for the other functional parts of the radio-controlled clock 11 (illustrated in the drawing by the supply of the motor 15), namely continuously during the operation of the radio-controlled clock 11.
  • the receiver 23 receives the pulse-length-amplitude-modulated, binary-coded absolute time information 25 via its usually magnetic, tuned long-wave antenna 24.
  • the modulation appears in the rigid grid of seconds as a shorter or longer lasting reduction in amplitude of the carrier located in the lower long-wave range.
  • a demodulator 26 behind the input stage 27 of the receiver 23 supplies the absolute time information 28 contained in the received signal 25 to a real-time decoder 29.
  • a comparator 30 checks the correspondence of the real-time 31 with the display time 32.
  • an electronic display is corrected directly while in the case of an electromechanical time display 14, the driver circuit 13 is temporarily not supplied with the time-keeping pulses 34, which typically occur every second, but rather with correction pulses 35 appearing in a higher repetition frequency until the pointer position (display time 32) queried via the position encoder 18 with the currently determined real time 31 matches again. Then the changeover switch 33 is switched back by the comparator 30 to time-keeping operation of the time display 14. In addition, at the latest then, for example, in poor reception conditions also previously reset the switching stage 20 via a timer 36 and thus the circuit breaker 21 is opened again for the operation of the receiver 23 so that it does not consume any energy from the power source 22 until the next switch-on signal 19 appears.
  • the receiver 23 thus only supplies the real-time decoder 29 with the basic modulation and thus no (binary) information.
  • the corresponding energy consumption from the power source 22 is saved according to the present invention.
  • the switching stage 20 prepared by the switch-on signal 19 is switched on and only in time with a period signal 38 for switching on the receiver 23 and z. B. is switched off again via a time stage 39 before the end of the coding period 37. Since the receiver demodulator supplies 26 second synchronization pulses 40 to the oscillator of the time keeping 12, when the period signal 38 is tapped from the time keeping 12, the receiver 23 is switched on in a phase-locked manner at the beginning of a coding period 37.
  • the periodic switching off of the receiver via the time stage 39 can take place shortly after the time period for the binary "1" signal has elapsed, because in this way the shorter "0" signal is also fully detected.
  • a further energy saving results, however, if the time stage 39 switches off the receiver 23, which is switched on in the cycle of the coding period 37, after a period of time between the length of the "0" signal and the length of the "1" signal:
  • the demodulator 26 then delivers a "1" signal if the amplitude of the received signal 25 is still present when the receiver 23 is switched off, that is to say when the time stage 39 has expired has not risen again to its unmodulated value, otherwise it is a "0" signal.

Claims (5)

  1. Horloge radiocommandée (11) autonome, avec un récepteur (23), pouvant être mis en service par moments, pour recevoir une information de temps (28) à codage binaire par longueur d'impulsion, avec un faible taux de balayage, pour déterminer l'information de temps (28) actuelle à partir de périodes de codage (37) se produisant selon une trame temporelle fixe, caractérisée en ce que des moyens sont prévus pour remettre chaque fois hors service le récepteur (23) pendant la réception de l'information de temps (28) actuelle citée, dès qu'il est constaté que l'information déterminée dans la période de codage (27) actuellement reçue est un ZERO logique binaire ou bien un UN logique binaire, pour remettre en service le récepteur (23) ensuite au début de la période de temps (37) subséquente.
  2. Horloge radiocommandée selon la revendication 1, caractérisée en ce qu'un interrupteur de puissance (21) destinée à l'alimentation du récepteur (23), à partir d'un signal de période (38) synchronisé vis-à-vis de l'information de temps (28) actuelle, peut être commuté pour devenir passant.
  3. Horloge radiocommandée selon la revendication 1 ou 2, caractérisée en ce que des moyens sont prévus pour remettre hors service le récepteur (23) mis en service au début d'une période de codage (37), après écoulement de l'intervalle de temps correspondant au ZERO logique binaire, c'est-à-dire au signal binaire court de l'information de temps (28) à codage binaire par longueur d'impulsion citée.
  4. Horloge radiocommandée selon l'une des revendications précédentes, caractérisée par des moyens prévus pour la remise hors service du récepteur (23) mis en service au début d'une période de codage (37), après écoulement d'un intervalle de temps qui correspond au UN logique binaire, c'est-à-dire au signal binaire long de l'information de temps (28) à codage binaire par longueur d'impulsion citée.
  5. Horloge radiocommandée selon une des revendications 1 à 3, caractérisé en ce que des moyens sont prévus pour remettre hors service le récepteur (23) mis en service au début d'une période de codage (37), après écoulement d'un intervalle de temps qui est celui qu'il y a entre le ZERO logique binaire et le UN logique binaire, c'est-à-dire entre le signal binaire court et le signal binaire long de l'information de temps (28) à codage binaire par longueur d'impulsion citée.
EP94100550A 1993-01-25 1994-01-15 Montre radiopilotée autonome Expired - Lifetime EP0608733B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9300945U DE9300945U1 (de) 1993-01-25 1993-01-25 Autonome Funkuhr
DE9300945U 1993-01-25

Publications (3)

Publication Number Publication Date
EP0608733A2 EP0608733A2 (fr) 1994-08-03
EP0608733A3 EP0608733A3 (fr) 1995-02-15
EP0608733B1 true EP0608733B1 (fr) 1997-09-03

Family

ID=6888524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100550A Expired - Lifetime EP0608733B1 (fr) 1993-01-25 1994-01-15 Montre radiopilotée autonome

Country Status (4)

Country Link
EP (1) EP0608733B1 (fr)
AT (1) ATE157783T1 (fr)
DE (2) DE9300945U1 (fr)
ES (1) ES2108303T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19904330A1 (de) 1999-01-28 2000-08-10 Basf Coatings Ag Wäßriger Beschichtungsstoff und Modulsystem zu seiner Herstellung
DE10334990B4 (de) * 2003-07-31 2016-03-17 Atmel Corp. Funkuhr
US7333467B2 (en) 2003-12-08 2008-02-19 Atmel Germany Gmbh Receiver circuit and method using selectively variable amplification for receiving time signals from different transmitters
DE102004004411B4 (de) 2004-01-29 2015-08-20 Atmel Corp. Funkuhr und Verfahren zur Gewinnung von Zeitinformationen
DE102004004375B4 (de) 2004-01-29 2019-08-08 Atmel Corp. Verfahren zur Gewinnung von Zeitinformationen und Funkuhr

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3144321A1 (de) * 1981-11-07 1983-05-19 Wolfgang Dr.-Ing. 6101 Groß-Bieberau Hilberg Funkuhr-quarzuhr-kombination
JPS58182332A (ja) * 1982-04-19 1983-10-25 Nec Corp 選択呼出し受信機のバツテリ・セ−ビング装置
JPH01190054A (ja) * 1988-01-25 1989-07-31 Man Design Kk 受信機

Also Published As

Publication number Publication date
ES2108303T3 (es) 1997-12-16
ATE157783T1 (de) 1997-09-15
EP0608733A2 (fr) 1994-08-03
DE59403898D1 (de) 1997-10-09
EP0608733A3 (fr) 1995-02-15
DE9300945U1 (de) 1994-05-26

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