EP0608733A2 - Montre réceptrice autonome - Google Patents

Montre réceptrice autonome Download PDF

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Publication number
EP0608733A2
EP0608733A2 EP94100550A EP94100550A EP0608733A2 EP 0608733 A2 EP0608733 A2 EP 0608733A2 EP 94100550 A EP94100550 A EP 94100550A EP 94100550 A EP94100550 A EP 94100550A EP 0608733 A2 EP0608733 A2 EP 0608733A2
Authority
EP
European Patent Office
Prior art keywords
switched
time
receiver
coding
period
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
Application number
EP94100550A
Other languages
German (de)
English (en)
Other versions
EP0608733B1 (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.
  • radio clocks have been received by the applicant in a wide variety of models as wall, table or wristwatches on the market and have met with a great response.
  • Their function with the periodic control and, if necessary, correction of the time display based on absolute time information received in the long-wave range - in contrast to the mere display control based on a time signal - is described in more detail in EP-PS 0 180 155.
  • the binary coding introduced at the German official time transmitter, which is emitted by periodically reducing the amplitude of the long-wave carrier frequency, is described in detail in the article "Watches controlled by radio" by M. Schlegel in VDI-News No. 3 of January 21, 1977 on page 8.
  • the receiver In the case of mains-operated radio-controlled clocks, the receiver is only switched on from time to time to protect the power source (battery or solar cell memory) in order to obtain absolute time information and to compare it with the current time display, if necessary to correct.
  • the current consumption of the receiver could already be reduced to such an extent that battery-operated radio wristwatches can be implemented with sufficient runtime between two battery changes.
  • the invention has for its object to further reduce the energy requirement of the receiver of a generic radio clock in order to further extend the operating time of a battery or to realize the operation of the radio clock from weaker power sources such as electrical solar energy stores with a sufficient operating time for consumer clocks.
  • the receiver which is only switched on from time to time, does not even remain switched on for the duration of the reception of the coded time information (the so-called time telegram). Rather, it is switched on at the beginning of a coding period and then immediately switched off again after it has been established that the information currently received was a binary logic "0" or "1". This saves on the order of 20% of that energy requirement for constant activation during the time telegram, since the longest binary information in the coding system introduced measures only 20% of the time period of the coding period.
  • 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 only switched on temporarily in the rhythm of the time telegrams only in time with 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 remainder 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 organ 16 (pointer 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, for wristwatches usually only once or several times at night) a switch-on signal 19 to a switching stage 20 for the circuit breaker 21.
  • time Time usually hourly for wall or table clocks, for wristwatches usually only once or several times at night
  • 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 clock 11 (illustrated in the drawing by the supply of the motor 15), namely continuously during the operation of the radio 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.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Toys (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Electric Clocks (AREA)
  • Circuits Of Receivers In General (AREA)
  • Electromechanical Clocks (AREA)
  • Mobile Radio Communication Systems (AREA)
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 true EP0608733A2 (fr) 1994-08-03
EP0608733A3 EP0608733A3 (fr) 1995-02-15
EP0608733B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6555612B1 (en) 1999-01-28 2003-04-29 Basf Coatings Ag Aqueous coating material and modular system for producing same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE102004004375B4 (de) 2004-01-29 2019-08-08 Atmel Corp. Verfahren zur Gewinnung von Zeitinformationen und Funkuhr
DE102004004411B4 (de) 2004-01-29 2015-08-20 Atmel Corp. Funkuhr und Verfahren zur Gewinnung von Zeitinformationen

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6555612B1 (en) 1999-01-28 2003-04-29 Basf Coatings Ag Aqueous coating material and modular system for producing same

Also Published As

Publication number Publication date
EP0608733B1 (fr) 1997-09-03
EP0608733A3 (fr) 1995-02-15
DE59403898D1 (de) 1997-10-09
DE9300945U1 (de) 1994-05-26
ES2108303T3 (es) 1997-12-16
ATE157783T1 (de) 1997-09-15

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