EP0590337A1 - Method for the functioning pf a radio clock and radio clock to be used in an envirenment with disturbed field - Google Patents

Method for the functioning pf a radio clock and radio clock to be used in an envirenment with disturbed field Download PDF

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Publication number
EP0590337A1
EP0590337A1 EP93114018A EP93114018A EP0590337A1 EP 0590337 A1 EP0590337 A1 EP 0590337A1 EP 93114018 A EP93114018 A EP 93114018A EP 93114018 A EP93114018 A EP 93114018A EP 0590337 A1 EP0590337 A1 EP 0590337A1
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EP
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Prior art keywords
clock
further device
operating state
time signal
synchronization
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Granted
Application number
EP93114018A
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German (de)
French (fr)
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EP0590337B2 (en
EP0590337B1 (en
Inventor
Reinhold Kaiser
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Conti Temic Microelectronic GmbH
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Temic Telefunken Microelectronic GmbH
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G7/00—Synchronisation
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G15/00—Time-pieces comprising means to be operated at preselected times or after preselected time intervals
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C11/00—Synchronisation of independently-driven clocks
    • 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

Definitions

  • the invention relates to a radio clock according to the preamble of claim 1.
  • Radio clocks are generally supplied with a time signal via the transmitter DCF-77 of the Physikalisch-Technische Bundesweg.
  • a first type of radio clocks constantly receives the time signal and always displays the time received.
  • a second type of radio controlled clock periodically synchronizes an autonomously running, quartz-controlled clock with the time signal. Small, battery-operated radio-controlled clocks in particular work according to the second principle to save energy.
  • the synchronization of the internal clockwork with the time signal typically takes place every 24 hours in the early morning and is independent of other factors such as e.g. B. the reception quality of the time signal or the strength of prevailing interference fields in the environment.
  • a first object of the invention is to specify a method for operating a radio clock which allows the radio clock to be operated in an environment subject to interference. This object is achieved by a method having the characterizing features of claim 1.
  • the arrangement shown in Figure 1 consists of a radio clock FU with a quartz-controlled clock QU, which is synchronized by a time signal receiver ZE via a signal processor SP with the received time signal.
  • the time signal receiver ZE has an antenna suitable for receiving the time signal.
  • the radio clock FU forms together with one a further device G1 a functional unit, the further device G1 being able to assume operating states which generate such an interference field, which disrupt the reception of the time signal or make it impossible.
  • a detector DS is provided which detects such an operating state of the further device G1 and, if such an operating state is present, prevents the synchronization of the quartz-controlled clock QU with the time signal.
  • the detector DS is connected to the time signal receiver ZE and suppresses the reception of the time signal when the further device G1 generates strong interference fields.
  • the further device G1 can, for. B. a computer, a calculator, a PC, a mainframe, a motor vehicle or a television receiver. What they all have in common is that they generate an interference signal during operation that does not permit the radio-controlled operation of the radio clock at the same time. On the other hand, they do not generate an interference signal when switched off.
  • the detector DS monitors the supply of the operating voltage UB to the further device G1. The synchronization takes place only when no operating voltage is supplied to the further device and the latter is thus in the switched-off state.
  • the detector consists of a changeover switch which, in alternation with the further device G1, supplies the time signal receiver ZE with the operating voltage. This measure ensures that the time signal receiver ZE can only be put into operation when no operating voltage is supplied to the further device G1 and the latter is switched off.
  • the detector consists of a broadband radio receiver which detects the interference radiation generated by the further device G1 and, from a certain intensity of the interference radiation, prevents the synchronization of the quartz-controlled clock QU by the time signal receiver ZE.
  • Embodiments of the invention can provide that the next synchronization of the quartz-controlled clock QU takes place after a predetermined period of time has elapsed since the last successful synchronization. This can be achieved that the synchronization z. B. takes place every 24 hours. In the case of periodic operation of the further device G1, the quartz-controlled clock QU is then also synchronized regularly with the time signal.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

The invention relates to a method for operating a radio clock (FU) consisting of a crystal-controlled clock (QU) which is synchronized with a time-mark signal by means of a time-mark receiver (ZE) via a signal processor (SP). In a joint arrangement having a further device (G1), for example a computer or a television set, the reception of the time-mark signal is generally largely suppressed because of the interfering effects of the further device (G1). Consequently, in the case of the method according to the invention the synchronization of the quartz-controlled clock (QU) with the time-mark signal is performed exclusively when the further device (G1) does not generate an interference field. For this purpose, a detector (DS) is provided which detects the operating state of the further device and permits the quartz clock (QU) to be synchronized with the time-mark signal only if the further device (G1) generates no interference field or a reduced interference field. Also described is a radio clock which is suitable for operation using the method according to the invention. <IMAGE>

Description

Die Erfindung betrifft eine Funkuhr nach dem Oberbegriff des Anspruchs 1.The invention relates to a radio clock according to the preamble of claim 1.

Funkuhren werden im allgemeinen über den Sender DCF-77 der Physikalisch-technischen Bundesanstalt mit einem Zeitzeichensignal versorgt. Eine erste Art von Funkuhren empfängt das Zeitzeichensignal ständig und bringt stets die empfangene Zeit zur Anzeige. Eine zweite Art von Funkuhren synchronisiert eine autonom laufende, quarzgesteuerte Uhr periodisch mit dem Zeitzeichensignal. Insbesondere kleine, batteriebetriebene Funkuhren arbeiten aus Energiespargründen nach dem zweiten Prinzip. Das Synchronisieren des internen Uhrenwerks mit dem Zeitzeichensignal findet typischerweise alle 24 Stunden in den frühen Morgenstunden statt und ist unabhängig von weiteren Faktoren wie z. B. der Empfangsqualität des Zeitzeichensignals oder der Stärke von in der Umgebung vorherrschenden Störfeldern.Radio clocks are generally supplied with a time signal via the transmitter DCF-77 of the Physikalisch-Technische Bundesanstalt. A first type of radio clocks constantly receives the time signal and always displays the time received. A second type of radio controlled clock periodically synchronizes an autonomously running, quartz-controlled clock with the time signal. Small, battery-operated radio-controlled clocks in particular work according to the second principle to save energy. The synchronization of the internal clockwork with the time signal typically takes place every 24 hours in the early morning and is independent of other factors such as e.g. B. the reception quality of the time signal or the strength of prevailing interference fields in the environment.

Es ist weiterhin bekannt, daß viele elektronische Geräte aus dem Gebiet der Signalerzeugung oder Signalverarbeitung Störfelder erzeugen, die andere Funktionen im gleichen Gerät oder Funktionen von in der näheren Umgebung aufgestellter Geräte stören oder unmöglich machen können. Diese Art von Störfeldern unterbinden den Betrieb von Funkuhren in Geräten, wie z. B. PCs, Fernsehern, Videorecordern usw. Bei dem Betrieb derartiger Geräte ist der Empfang des Zeitzeichensignals nur mit sehr großem technischen Aufwand möglich.It is also known that many electronic devices in the field of signal generation or signal processing generate interference fields which can interfere with or make impossible other functions in the same device or functions of devices placed in the vicinity. These types of interference fields prevent operation of radio clocks in devices such as B. PCs, televisions, video recorders, etc. In the operation of such devices, the reception of the time signal is only possible with very great technical effort.

Eine erste Aufgabe der Erfindung ist es, ein Verfahren zum Betreiben einer Funkuhr anzugeben, das den Betrieb der Funkuhr in einer störfeldbehafteten Umgebung gestattet. Diese Aufgabe wird gelöst durch ein Verfahren mit den kennzeichnenden Merkmalen des Anspruchs 1.A first object of the invention is to specify a method for operating a radio clock which allows the radio clock to be operated in an environment subject to interference. This object is achieved by a method having the characterizing features of claim 1.

Es ist eine weitere Aufgabe der Erfindung, eine Funkuhr anzugeben, die für den Betrieb in einer störfeldbehafteten Umgebung geeignet ist. Diese Aufgabe wird durch eine Funkuhr mit den kennzeichnenden Merkmalen des Anspruchs 7 gelöst.It is a further object of the invention to provide a radio clock which is suitable for operation in an environment subject to interference. This object is achieved by a radio clock with the characterizing features of claim 7.

Die vorteilhafte Ausgestaltung der Erfindung erfolgt gemäß den Merkmalen der abhängigen Ansprüche.The advantageous embodiment of the invention takes place according to the features of the dependent claims.

Im folgenden sei ein Ausführungsbeispiel der Erfindung anhand der Figuren erläutert. Dabei zeigen die

Figur 1
ein Blockschaltbild der erfindungsgemäßen Funkuhr,
Figur 2
eine Ausführungsform der Erfindung.
An exemplary embodiment of the invention is explained below with reference to the figures. The show
Figure 1
2 shows a block diagram of the radio clock according to the invention,
Figure 2
an embodiment of the invention.

Die in der Figur 1 dargestellte Anordnung besteht aus einer Funkuhr FU mit einer quarzgesteuerten Uhr QU, die durch einen Zeitzeichenempfänger ZE über einen Signalprozessor SP mit dem empfangenen Zeitzeichensignal synchronisiert wird. Der Zeitzeichenempfänger ZE weist eine zum Empfang des Zeitzeichensignals geeignete Antenne auf. Die Funkuhr FU bildet zusammen mit einer weiteren Einrichtung G1 eine Funktionseinheit, wobei die weitere Einrichtung G1 Betriebszustände einnehmen kann, die ein derartiges Störfeld erzeugen, die den Empfang des Zeitzeichensignals stören bzw. unmöglich machen. Erfindungsgemäß ist ein Detektor DS vorgesehen, der einen solchen Betriebszustand der weiteren Einrichtung G1 erkennt und bei Vorliegen eines solchen Betriebszustands die Synchronisierung der quarzgesteuerten Uhr QU mit dem Zeitzeichensignal unterbindet.The arrangement shown in Figure 1 consists of a radio clock FU with a quartz-controlled clock QU, which is synchronized by a time signal receiver ZE via a signal processor SP with the received time signal. The time signal receiver ZE has an antenna suitable for receiving the time signal. The radio clock FU forms together with one a further device G1 a functional unit, the further device G1 being able to assume operating states which generate such an interference field, which disrupt the reception of the time signal or make it impossible. According to the invention, a detector DS is provided which detects such an operating state of the further device G1 and, if such an operating state is present, prevents the synchronization of the quartz-controlled clock QU with the time signal.

In einer vorteilhaften Ausgestaltung der Erfindung ist der Detektor DS mit dem Zeitzeichenempfänger ZE verbunden und unterdrückt den Empfang des Zeitzeichens, wenn die weitere Einrichtung G1 starke Störfelder erzeugt. Die weitere Einrichtung G1 kann z. B. ein Computer, ein Taschenrechner, ein PC, ein Großrechner, ein Kraftfahrzeug oder ein Fernsehempfänger sein. Allen gemeinsam ist, daß sie beim Betrieb ein Störsignal erzeugen, das den gleichzeitigen funkgesteuerten Betrieb der Funkuhr nicht zuläßt. Andererseits erzeugen sie im abgeschalteten Zustand kein Störsignal.In an advantageous embodiment of the invention, the detector DS is connected to the time signal receiver ZE and suppresses the reception of the time signal when the further device G1 generates strong interference fields. The further device G1 can, for. B. a computer, a calculator, a PC, a mainframe, a motor vehicle or a television receiver. What they all have in common is that they generate an interference signal during operation that does not permit the radio-controlled operation of the radio clock at the same time. On the other hand, they do not generate an interference signal when switched off.

In einer weiteren Ausgestaltung der Erfindung überwacht der Detektor DS die Zuführung der Betriebsspannung UB an die weitere Einrichtung G1. Die Synchronisation findet ausschließlich dann statt, wenn der weiteren Einrichtung keine Betriebsspannung zugeführt wird und diese sich somit im ausgeschalteten Zustand befindet. Der Detektor besteht in diesem Fall aus einem Umschalter, der dem Zeitzeichenempfänger ZE im Wechsel zur weiteren Einrichtung G1 die Betriebsspannung zuführt. Durch diese Maßnahme ist gewährleistet, daß der Zeitzeichenempfänger ZE nur dann in Betrieb genommen werden kann, wenn der weiteren Einrichtung G1 keine Betriebsspannung zugeführt wird und diese abgeschaltet ist.In a further embodiment of the invention, the detector DS monitors the supply of the operating voltage UB to the further device G1. The synchronization takes place only when no operating voltage is supplied to the further device and the latter is thus in the switched-off state. In this case, the detector consists of a changeover switch which, in alternation with the further device G1, supplies the time signal receiver ZE with the operating voltage. This measure ensures that the time signal receiver ZE can only be put into operation when no operating voltage is supplied to the further device G1 and the latter is switched off.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung besteht der Detektor aus einem breitbandigen Funkempfänger, der die von der weiteren Einrichtung G1 erzeugte Störstrahlung erfaßt und ab einer gewissen Stärke der Störstrahlung die Synchronisation der quarzgesteuerten Uhr QU durch den Zeitzeichenempfänger ZE unterbindet.In a further advantageous embodiment of the invention, the detector consists of a broadband radio receiver which detects the interference radiation generated by the further device G1 and, from a certain intensity of the interference radiation, prevents the synchronization of the quartz-controlled clock QU by the time signal receiver ZE.

In beiden o. a. Ausführungen der Erfindung kann vorgesehen sein, daß die nächste Synchronisation der quarzgesteuerten Uhr QU nach Ablauf einer festgelegten Zeitspanne seit der letzten erfolgreichen Synchronisation erfolgt. Damit kann erreicht werden, daß die Synchronisierung z. B. alle 24 Stunden erfolgt. Bei einem periodischen Betrieb der weiteren Einrichtung G1 erfolgt dann auch die Synchronisierung der quarzgesteuerten Uhr QU mit dem Zeitzeichensignal regelmäßig.In both of the above Embodiments of the invention can provide that the next synchronization of the quartz-controlled clock QU takes place after a predetermined period of time has elapsed since the last successful synchronization. This can be achieved that the synchronization z. B. takes place every 24 hours. In the case of periodic operation of the further device G1, the quartz-controlled clock QU is then also synchronized regularly with the time signal.

Claims (10)

Verfahren zum Betreiben einer Funkuhr (FU), bestehend aus einer quarzgesteuerten Uhr (QU), die durch einen Zeitzeichenempfänger (ZE) mit einem Zeitzeichensignal synchronisiert wird, in einer gemeinsamen Anordnung mit einer weiteren Einrichtung (G1), die mehrere Betriebszustände einnehmen kann, dadurch gekennzeichnet, daß die weitere Einrichtung (G1) in einem ersten Betriebszustand ein starkes Störfeld und in einem zweiten Betriebszustand ein reduziertes bzw. kein Störfeld erzeugt, und daß die Synchronisation der quarzgesteuerten Uhr (QU) mit dem Zeitzeichensignal ausschließlich dann erfolgt, wenn sich die weitere Einrichtung (G1) im zweiten Betriebszustand befindet.Method for operating a radio clock (FU), consisting of a quartz-controlled clock (QU), which is synchronized by a time signal receiver (ZE) with a time signal, in a common arrangement with a further device (G1), which can assume several operating states characterized in that the further device (G1) generates a strong interference field in a first operating state and a reduced or no interference field in a second operating state, and that the synchronization of the quartz-controlled clock (QU) with the time signal only takes place when the further Device (G1) is in the second operating state. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Detektor (DS) vorgesehen ist, der den Betriebszustand der weiteren Einrichtung (G1) erkennt.Method according to Claim 1, characterized in that a detector (DS) is provided which detects the operating state of the further device (G1). Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Synchronisation der Uhr (QU) mit dem Zeitzeichensignal vom Detektor (DS) gesteuert wird.Method according to claim 2, characterized in that the synchronization of the clock (QU) with the time signal is controlled by the detector (DS). Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß nach erfolgter Synchronisation für einen vorbestimmten Zeitintervall keine weitere Synchronisation erfolgt.Method according to Claim 3, characterized in that after synchronization has taken place, no further synchronization takes place for a predetermined time interval. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß nach Ablauf des vorbestimmten Zeitintervalls die Synchronisation dann erfolgt, wenn der Detektor (DS) den zweiten Betriebszustand der weiteren Einrichtung (G1) erkannt hat.Method according to Claim 4, characterized in that after the predetermined time interval has elapsed, the synchronization takes place when the detector (DS) has recognized the second operating state of the further device (G1). Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Zeitzeichensignal im zweiten Betriebszustand der weiteren Einrichtung (G1) ständig empfangen und ausgewertet wird.Method according to one of Claims 1 to 3, characterized in that the time signal is continuously received and evaluated in the second operating state of the further device (G1). Funkuhr (FU), bestehend aus einer autonomen, quarzgesteuerten Uhr (QU), die durch einen Zeitzeichenempfänger (ZE) mit einem Zeitzeichensignal synchronisiert wird, für den Betrieb in einer gemeinsamen Anordnung mit einer weiteren Einrichtung (G1), welche einen ersten und einen zweiten Betriebszustand einnehmen kann, wobei die Einrichtung (G1) im ersten Betriebszustand ein starkes Störfeld und im zweiten Betriebszustand ein reduziertes bzw. kein Störfeld erzeugt, dadurch gekennzeichnet, daß eine Detektoranordnung (DS) vorgesehen ist, um den Betriebszustand der weiteren Einrichtung (G1) festzustellen und um eine Synchronisation der Uhr (QU) mit dem Zeitzeichensignal nur dann zuzulassen, wenn sich die weitere Einrichtung (G1) im zweiten Betriebszustand befindet.Radio clock (FU), consisting of an autonomous, quartz-controlled clock (QU), which is synchronized by a time signal receiver (ZE) with a time signal, for operation in a common arrangement with another device (G1), which has a first and a second Can assume operating state, the device (G1) generating a strong interference field in the first operating state and a reduced or no interference field in the second operating state, characterized in that a detector arrangement (DS) is provided to determine the operating state of the further device (G1) and to permit synchronization of the clock (QU) with the time signal only when the further device (G1) is in the second operating state. Funkuhr nach Anspruch 7, dadurch gekennzeichnet, daß der Detektor (DS) die Betriebsspannung (U) der weiteren Einrichtung (G1) überwacht.Radio clock according to claim 7, characterized in that the detector (DS) monitors the operating voltage (U) of the further device (G1). Funkuhr nach Anspruch 8, dadurch gekennzeichnet, daß bei Nichtanliegen der Betriebsspannung (U) an der weiteren Einrichtung (G1), der Detektor (DS) die Synchronisation der Uhr (QU) mit dem Zeitzeichensignal zuläßt.Radio clock according to claim 8, characterized in that when the operating voltage (U) is not applied to the further device (G1), the detector (DS) allows the clock (QU) to be synchronized with the time signal. Funkuhr nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, daß ein Zähler vorgesehen ist, der mit der Funkuhr (FU) verbunden ist und der nach erfolgter Synchronisation eine weitere Synchronisation für ein bestimmtes Zeitintervall blockiert.Radio clock according to one of claims 7 to 9, characterized in that a counter is provided which is connected to the radio clock (FU) and which blocks a further synchronization for a certain time interval after synchronization has taken place.
EP93114018A 1992-10-02 1993-09-02 Method for the functioning pf a radio clock and radio clock to be used in an envirenment with disturbed field Expired - Lifetime EP0590337B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4233126 1992-10-02
DE4233126A DE4233126A1 (en) 1992-10-02 1992-10-02 Procedure for the operation of a radio clock and radio clock for use in an environment subject to interference

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EP0590337A1 true EP0590337A1 (en) 1994-04-06
EP0590337B1 EP0590337B1 (en) 1996-11-20
EP0590337B2 EP0590337B2 (en) 2001-01-10

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US (1) US5349570A (en)
EP (1) EP0590337B2 (en)
KR (1) KR100248170B1 (en)
DE (2) DE4233126A1 (en)
ES (1) ES2094983T5 (en)

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* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 153 (E - 159) 15 December 1979 (1979-12-15) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 359 (E - 1110) 11 September 1991 (1991-09-11) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0892325A1 (en) * 1997-07-17 1999-01-20 Valeo Electronics GmbH & Co. KG Radio clock for motor vehicle
DE19730553A1 (en) * 1997-07-17 1999-01-21 Valeo Borg Instr Verw Gmbh Radio clock for motor vehicles
EP1669818A1 (en) * 2003-09-30 2006-06-14 Seiko Epson Corporation Radio controlled clock, electronic device, method for controlling radio controlled clock, and program for controlling reception of radio controlled clock
EP1669818A4 (en) * 2003-09-30 2008-03-05 Seiko Epson Corp Radio controlled clock, electronic device, method for controlling radio controlled clock, and program for controlling reception of radio controlled clock

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KR100248170B1 (en) 2000-03-15
ES2094983T3 (en) 1997-02-01
EP0590337B2 (en) 2001-01-10
EP0590337B1 (en) 1996-11-20
KR940009789A (en) 1994-05-24
DE59304528D1 (en) 1997-01-02
ES2094983T5 (en) 2001-03-16
DE4233126A1 (en) 1994-04-07
US5349570A (en) 1994-09-20

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