EP3611577A1 - Tachograph and method for regulating an internal time of a tachograph - Google Patents

Tachograph and method for regulating an internal time of a tachograph Download PDF

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Publication number
EP3611577A1
EP3611577A1 EP19190914.2A EP19190914A EP3611577A1 EP 3611577 A1 EP3611577 A1 EP 3611577A1 EP 19190914 A EP19190914 A EP 19190914A EP 3611577 A1 EP3611577 A1 EP 3611577A1
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Prior art keywords
time
tachograph
lim
time deviation
navigation system
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EP19190914.2A
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German (de)
French (fr)
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EP3611577B1 (en
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Franz Kimmich
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Continental Automotive Technologies GmbH
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Continental Automotive GmbH
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R40/00—Correcting the clock frequency
    • G04R40/06—Correcting the clock frequency by computing the time value implied by the radio signal
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/04—Temperature-compensating arrangements
    • 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
    • G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS

Definitions

  • the invention relates to a tachograph with regulation of an internal time of the tachograph, in particular with an adjustment of the internal time of the tachograph to a time predetermined by a satellite navigation system.
  • the invention further relates to a method for regulating an internal time of a tachograph, in particular a method for adapting the internal time of the tachograph to a time specified by a satellite navigation system.
  • Today's tachographs usually include a real time clock that is temperature compensated.
  • the real-time clock can be a quartz clock, for example.
  • the compensation algorithm can take into account a parameter component K 20 ° C for the nominal deviation of the real-time clock at 20 ° C and another component K temp , the value of which depends on the temperature.
  • a satellite navigation receiver for example a GNSS receiver
  • the device-internal time is usually adapted in steps of seconds to a received time of the satellite navigation system, for example a received GNSS time.
  • a time adjustment between the internal time of the tachograph and the time of the satellite navigation system of greater than or equal to one second can lead to a changed data recording, which is different in comparison without time adjustment.
  • An object of the present invention is to provide a tachograph or a method for regulating an internal time of the tachograph, in which the internal time of the Tachograph is kept synchronized with the received time of the satellite navigation system, for example a GNSS system.
  • a method for regulating an internal time of a tachograph is specified in claim 1.
  • signals from a satellite navigation system are received.
  • the time specified by the satellite navigation system is determined by evaluating the signals of the satellite navigation system.
  • a time deviation of the internal time of the tachograph from the time specified by the satellite navigation system is then determined.
  • a component of a compensation parameter is determined in order to match the internal time of the tachograph to the time specified by the satellite navigation system.
  • the component of the compensation parameter is determined as a function of the time deviation determined.
  • the internal time of the tachograph is then adjusted to the time specified by the satellite navigation system as a function of the compensation parameter.
  • the tachograph includes a receiver for receiving signals from a satellite navigation system.
  • the receiver is designed to determine the time specified by the satellite navigation system by evaluating the signals of the satellite navigation system.
  • the tachograph comprises an evaluation device for determining a time deviation of the internal time of the tachograph from the time specified by the satellite navigation system.
  • the tachograph also includes a control device for determining a component of a compensation parameter for adapting the internal time of the tachograph to the time specified by the satellite navigation system.
  • the control device is in particular designed to determine the component of the compensation parameter as a function of the determined time deviation.
  • the control device is designed to adapt the internal time of the tachograph to the time specified by the satellite navigation system as a function of the compensation parameter.
  • a compensation of the real time clock of the tachograph is initiated.
  • the adjustment mechanism is similar to the temperature compensation of a real-time clock.
  • the divider factor can be changed from quartz frequency to second cycle in order to match the internal clock of the tachograph to the time of the satellite navigation system.
  • the internal time of the tachograph is adapted in micro steps to the time of the satellite navigation system, or kept as synchronous as possible. In particular, it is ensured that no time adjustment greater than or equal to one second is necessary within the tachograph. This enables the data to be recorded correctly in the tachograph.
  • the method can also be used in principle in other devices which receive or determine a satellite navigation time and in which an internal time adjustment greater than one second is disruptive.
  • Figure 1 illustrates a method for real-time clock adjustment of the internal time of a tachograph to the time of a satellite navigation system, for example to a GNSS time.
  • the time difference or time deviation between the internal time of the tachograph and a time t Sat specified by a satellite navigation system is plotted.
  • the Figure 1 It is illustrated how a time-dependent component K ⁇ t (time difference compensation component) of a compensation parameter K total is determined in order to adapt the internal time t DTCO of the tachograph to the time t Sat specified by the satellite navigation system.
  • Total of the compensation parameters K takes account of Paramterkomponente K 20 ° C for nominal deviation at 20 ° C and the component K temp, the value of which is temperature dependent, then the component K At, the t as a function of the determined time difference At between the internal time DTCO of the tachograph and the time t Sat specified by the satellite navigation system.
  • signals from a satellite navigation system for example signals from a GNSS system
  • the time t Sat specified by the satellite navigation system can be determined by evaluating the signals of the satellite navigation system.
  • a time deviation .DELTA.t of the internal time t DTCO of the tachograph from the time t Sat predetermined by the satellite navigation system is then determined (upper curve profile of FIG Figure 1 ).
  • the component K ⁇ t of the compensation parameter K total is subsequently determined in order to adapt the internal time t DTCO of the tachograph to the time t Sat specified by the satellite navigation system as a function of the determined time deviation ⁇ t.
  • the determination of the component K ⁇ t of the compensation parameter K total is shown in the lower diagram Figure 1 illustrated. This procedure is discussed in more detail below.
  • the internal time t DTCO of the tachograph is adjusted to the time specified by the satellite navigation system as a function of the compensation parameter K total or the component K ⁇ t of the compensation parameter K total .
  • the additional component K ⁇ t of the compensation parameter K overall depends on the determined time difference ⁇ t between the internal time t DTCO of the tachograph and the time t Sat specified by the satellite navigation system.
  • the additional component K is ⁇ t of the compensation parameter K depends in total on the increase in time difference between the internal time t DTCO of the tachograph and the time t Sat specified by the satellite navigation system.
  • the component K ⁇ t of the compensation parameter K total is therefore not only dependent on the determined time difference ⁇ t, but also on a change in the determined time deviation ⁇ t during a predetermined time interval.
  • the first threshold value + Lim H of the time deviation ⁇ t is a positive value. If the first threshold value + Lim H of the time deviation ⁇ t is exceeded, the internal time of the tachograph specified by the internal clock (real time clock) of the tachograph leads the time t Sat of the satellite navigation system. The tachograph's internal clock therefore takes precedence.
  • the second threshold value -Lim H of the time deviation ⁇ t is a negative value. This means that the internal time t DTCO / the internal clock of the tachograph follows the satellite time t Sat.
  • the third threshold value + Lim L of the time deviation ⁇ t is a positive value which is smaller than the first threshold value + Lim H of the time deviation ⁇ t.
  • the fourth threshold value -Lim L of the time deviation ⁇ t is a negative value which is greater than the second threshold value -Lim H of the time deviation ⁇ t.
  • the last determined value of the component K ⁇ t of the compensation parameter K total is kept constant if the determined time deviation ⁇ t exceeds the third threshold value + Lim L der Time deviation ⁇ t falls below or exceeds the fourth threshold value -Lim L of time deviation ⁇ t.
  • the last determined value of the component K ⁇ t of the compensation parameter K overall is kept constant for a period of time until the determined time deviation ⁇ t again exceeds the first threshold value + Lim H or falls below the second threshold value -Lim H again.
  • the time compensation or adjustment of the real-time clock of the tachograph begins when the first threshold value + Lim H of the time deviation is exceeded at time A.
  • the component K ⁇ t of the compensation parameter K total is then changed until the time difference ⁇ t at time B has again reached an acceptable time difference tolerance between the threshold values + Lim L and -Lim L.
  • the last determined value of the component K ⁇ t of the compensation parameter K total is kept constant (time between time B and time C) until the time deviation ⁇ t exceeds the upper threshold + Lim H or falls below the lower threshold -Lim H.
  • the algorithm described is applied continuously.
  • the time difference influenced thereby or the second cycle influenced thereby typically remains below +/- 0.1%.
  • the recording accuracy of the time-dependent variables can be kept as small as possible.
  • FIG. 2 shows a possible embodiment of a tachograph 100 for receiving signals from a satellite navigation system 200, the internal time t DTCO , that is to say the internal clock 140, of the tachograph being regulated.
  • the tachograph comprises a receiver 110 for receiving signals from the satellite navigation system 200.
  • the receiver 110 is designed to calculate the time t Sat specified by the satellite navigation system 200 by evaluating the signals from the satellite navigation system 200 to investigate.
  • the tachograph 100 further comprises an evaluation device 120 for determining the time deviation ⁇ t of the internal time t DTCO of the tachograph 100 from the time t Sat specified by the satellite navigation system 200.
  • the tachograph further comprises a control device 130 for determining the component K ⁇ t of the compensation parameter K total in order to adapt the internal time t DTCO of the tachograph 100 to the time tsat specified by the satellite navigation system 200.
  • the control device 130 is designed to determine the component K ⁇ t of the compensation parameter K overall as a function of the determined time deviation ⁇ t.
  • the control device 130 is in particular designed to match the internal time t DTCO of the internal clock 140 of the tachograph 100 to the time t Sat predetermined by the satellite navigation system 200 as a function of the compensation parameter K overall .
  • control device 130 is in particular designed to determine the component K ⁇ t of the compensation parameter K total as a function of a change in the determined time deviation ⁇ t during a time interval.
  • control device 130 is designed to change a value of the component K ⁇ t of the compensation parameter K overall if the determined time deviation ⁇ t exceeds the first threshold value + Lim H of the time deviation or falls below the second threshold value -Lim H of the time deviation ,
  • control device 130 is designed to change the component K ⁇ t of the compensation parameter K overall during a period of time until the determined time deviation ⁇ t falls below the third threshold + Lim L of the time deviation or exceeds the fourth threshold -Lim L of the time deviation.
  • control device 130 is designed to keep the last determined value of the component K ⁇ t of the compensation parameter K overall constant when the determined time deviation ⁇ t falls below the third threshold value + Lim L or exceeds the fourth threshold value -Lim L.
  • the control device 130 can furthermore be designed to keep the last determined value of the component K ⁇ t of the compensation parameter K total constant over a period of time starting from falling below the third threshold value + Lim L or exceeding the fourth threshold value -Lim L until the determined one Time deviation ⁇ t exceeds the first threshold + Lim H or falls below the second threshold -Lim H.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

Gemäß einem Verfahren zum Regeln einer internen Zeit eines Tachographen werden Signale eines Satellitennavigationssystems (200) empfangen. Durch Auswerten der Signale wird die von dem Satellitennavigationssystem (200) vorgegebene Zeit (t<sub>Sat</sub>) ermittelt. Eine Zeitabweichung (Δt) der internen Zeit (T<sub>DTCO</sub>) des Tachographen (100) von der von dem Satellitennavigationssystem (200) vorgegebenen Zeit (t<sub>Sat</sub>) wird bestimmt. Zum Angleichen der internen Zeit (T<sub>DTCO</sub>) des Tachographen (100) an die von dem Satellitennavigationssystem (200) vorgegebene Zeit (t<sub>Sat</sub>) wird in Abhängigkeit von der ermittelten Zeitabweichung (Δt) eine Komponente (K<sub>Δt</sub>) eines Kompensationsparameters (K<sub>gesamt</sub>) ermittelt. In Abhängigkeit von der Komponente (K<sub>Δt</sub>) des Kompensationsparameters (K<sub>gesamt</sub>) wird die interne Zeit (T<sub>DTCO</sub>) des Tachographen (100) an die von dem Satellitennavigationssystem (200) vorgegebene Zeit (t<sub>Sat</sub>) angeglichen.According to a method for regulating an internal time of a tachograph, signals from a satellite navigation system (200) are received. The time specified by the satellite navigation system (200) (t <sub> Sat </sub>) is determined by evaluating the signals. A time deviation (Δt) of the internal time (T <sub> DTCO </sub>) of the tachograph (100) from the time (t <sub> Sat </sub>) specified by the satellite navigation system (200) is determined. To adjust the internal time (T <sub> DTCO </sub>) of the tachograph (100) to the time specified by the satellite navigation system (200) (t <sub> Sat </sub>), depending on the determined time deviation ( Δt) a component (K <sub> Δt </sub>) of a compensation parameter (K <sub> total </sub>) is determined. Depending on the component (K <sub> Δt </sub>) of the compensation parameter (K <sub> total </sub>), the internal time (T <sub> DTCO </sub>) of the tachograph (100) is displayed adjusted the time (t <sub> Sat </sub>) predetermined by the satellite navigation system (200).

Description

Die Erfindung betrifft einen Tachographen mit Regelung einer internen Zeit des Tachographen, insbesondere mit einer Angleichung der internen Zeit des Tachographen an eine von einem Satellitennavigationssystem vorgegebene Zeit. Weiterhin betrifft die Erfindung ein Verfahren zum Regeln einer internen Zeit eines Tachographen, insbesondere ein Verfahren zum Angleichen der internen Zeit des Tachographen an eine von einem Satellitennavigationssystem vorgegebene Zeit.The invention relates to a tachograph with regulation of an internal time of the tachograph, in particular with an adjustment of the internal time of the tachograph to a time predetermined by a satellite navigation system. The invention further relates to a method for regulating an internal time of a tachograph, in particular a method for adapting the internal time of the tachograph to a time specified by a satellite navigation system.

Heutige Tachographen umfassen üblicherweise eine Echtzeituhr, welche temperaturkompensiert ist. Die Echtzeituhr kann beispielsweise eine Quarz-Uhr sein. Der Kompensations-Algorithmus kann eine Parameterkomponente K20°C für Nennabweichung der Echtzeituhr bei 20 °C und eine weitere Komponente Ktemp, deren Wert temperaturabhängig ist, berücksichtigen. Der Kompensationsparameter Kgesamt zur Kompensation von Temperatureffekten ergibt sich somit aus den Komponenten K20°C und Ktemp zu Kgesamt = K20°C + Ktemp.Today's tachographs usually include a real time clock that is temperature compensated. The real-time clock can be a quartz clock, for example. The compensation algorithm can take into account a parameter component K 20 ° C for the nominal deviation of the real-time clock at 20 ° C and another component K temp , the value of which depends on the temperature. The compensation parameter K total for compensation of temperature effects thus results from the components K 20 ° C and K temp to K total = K 20 ° C + K temp .

In neueren Tachographen ist ein Satellitennavigationsempfänger, beispielsweise ein GNSS-Empfänger, eingebaut. Bei derartigen Tachographen wird üblicherweise die Geräte-interne Zeit in Sekunden-Schritten an eine empfangene Zeit des Satellitennavigationssystems, beispielsweise eine empfangene GNSS-Zeit, angepasst. Eine Zeitverstellung zwischen der internen Uhrzeit des Tachographen und der Zeit des Satellitennavigationssystems von größer oder gleich einer Sekunde kann zu einer veränderten Datenaufzeichnung führen, welche unterschiedlich ist im Vergleich ohne Uhrzeitverstellung.A satellite navigation receiver, for example a GNSS receiver, is built into newer tachographs. In the case of such tachographs, the device-internal time is usually adapted in steps of seconds to a received time of the satellite navigation system, for example a received GNSS time. A time adjustment between the internal time of the tachograph and the time of the satellite navigation system of greater than or equal to one second can lead to a changed data recording, which is different in comparison without time adjustment.

Ein Anliegen der vorliegenden Erfindung ist es, einen Tachographen beziehungsweise ein Verfahren zum Regeln einer internen Zeit des Tachographen anzugeben, bei dem die interne Uhrzeit des Tachographen synchron zur empfangenen Zeit des Satellitennavigationssystems, beispielsweise eines GNSS-Systems, gehalten wird.An object of the present invention is to provide a tachograph or a method for regulating an internal time of the tachograph, in which the internal time of the Tachograph is kept synchronized with the received time of the satellite navigation system, for example a GNSS system.

Ein Verfahren zum Regeln einer internen Zeit eines Tachographen ist im Patentanspruch 1 angegeben.A method for regulating an internal time of a tachograph is specified in claim 1.

Gemäß dem Verfahren werden Signale eines Satellitennavigationssystems empfangen. Durch Auswerten der Signale des Satellitennavigationssystems wird die von dem Satellitennavigationssystem vorgegebene Zeit ermittelt. Anschließend wird eine Zeitabweichung der internen Zeit des Tachographen von der von dem Satellitennavigationssystem vorgegebenen Zeit ermittelt. Zum Angleichen der internen Zeit des Tachographen an die von dem Satellitennavigationssystem vorgegebene Zeit wird eine Komponente eines Kompensationsparameters ermittelt. Die Komponente des Kompensationsparameters wird dabei in Abhängigkeit von der ermittelten Zeitabweichung bestimmt. Anschließend erfolgt ein Angleichen der internen Zeit des Tachographen an die von dem Satellitennavigationssystem vorgegebene Zeit in Abhängigkeit von dem Kompensationsparameter.According to the method, signals from a satellite navigation system are received. The time specified by the satellite navigation system is determined by evaluating the signals of the satellite navigation system. A time deviation of the internal time of the tachograph from the time specified by the satellite navigation system is then determined. A component of a compensation parameter is determined in order to match the internal time of the tachograph to the time specified by the satellite navigation system. The component of the compensation parameter is determined as a function of the time deviation determined. The internal time of the tachograph is then adjusted to the time specified by the satellite navigation system as a function of the compensation parameter.

Eine Ausführungsform eines Tachographen mit Regelung einer internen Zeit des Tachographen ist im Patentanspruch 9 angegeben.An embodiment of a tachograph with regulation of an internal time of the tachograph is specified in claim 9.

Der Tachograph umfasst einen Empfänger zum Empfangen von Signalen eines Satellitennavigationssystems. Der Empfänger ist dazu ausgebildet, die von dem Satellitennavigationssystem vorgegebene Zeit durch Auswerten der Signale des Satellitennavigationssystems zu ermitteln. Weiterhin umfasst der Tachograph eine Auswerteeinrichtung zum Ermitteln einer Zeitabweichung der internen Zeit des Tachographen von der von dem Satellitennavigationssystem vorgegebenen Zeit. Der Tachograph umfasst darüber hinaus eine Steuereinrichtung zum Ermitteln einer Komponente eines Kompensationsparameters zum Angleichen der internen Zeit des Tachographen an die von dem Satellitennavigationssystem vorgegebene Zeit. Die Steuereinrichtung ist insbesondere dazu ausgebildet, die Komponente des Kompensationsparameters in Abhängigkeit von der ermittelten Zeitabweichung zu bestimmen. Die Steuereinrichtung ist dazu ausgebildet, die interne Zeit des Tachographen an die von dem Satellitennavigationssystem vorgegebene Zeit in Abhängigkeit von dem Kompensationsparameter anzugleichen.The tachograph includes a receiver for receiving signals from a satellite navigation system. The receiver is designed to determine the time specified by the satellite navigation system by evaluating the signals of the satellite navigation system. Furthermore, the tachograph comprises an evaluation device for determining a time deviation of the internal time of the tachograph from the time specified by the satellite navigation system. The tachograph also includes a control device for determining a component of a compensation parameter for adapting the internal time of the tachograph to the time specified by the satellite navigation system. The control device is in particular designed to determine the component of the compensation parameter as a function of the determined time deviation. The control device is designed to adapt the internal time of the tachograph to the time specified by the satellite navigation system as a function of the compensation parameter.

Wenn eine bestimmte Zeitabweichung der internen Uhrzeit des Tachographen zur Zeit, die von dem Satellitennavigationssystem vorgegeben wird, erkannt wird, wird eine Kompensation der Echtzeituhr des Tachographen veranlasst. Der Angleichungsmechanismus ist dabei ähnlich zur Temperaturkompensation einer Echtzeituhr. Gemäß einer möglichen Ausführungsform kann insbesondere der Teilerfaktor von Quarzfrequenz zu Sekundentakt verändert werden, um die interne Uhr des Tachographen an die Zeit des Satellitennavigationssystems anzugleichen. Dabei wird die interne Uhrzeit des Tachographen in Mikroschritten an die Zeit des Satellitennavigationssystems angepasst, beziehungsweise möglichst zeitsynchron gehalten. Insbesondere wird gewährleistet, dass innerhalb des Tachographen keine Zeitverstellung größer oder gleich einer Sekunde notwendig ist. Dadurch kann die Aufzeichnung der Daten im Tachographen korrekt erfolgen.If a specific time deviation of the internal time of the tachograph from the time that is specified by the satellite navigation system is detected, a compensation of the real time clock of the tachograph is initiated. The adjustment mechanism is similar to the temperature compensation of a real-time clock. According to a possible embodiment, in particular the divider factor can be changed from quartz frequency to second cycle in order to match the internal clock of the tachograph to the time of the satellite navigation system. The internal time of the tachograph is adapted in micro steps to the time of the satellite navigation system, or kept as synchronous as possible. In particular, it is ensured that no time adjustment greater than or equal to one second is necessary within the tachograph. This enables the data to be recorded correctly in the tachograph.

Neben dem Einsatz in einem Tachographen ist das Verfahren grundsätzlich auch in anderen Geräten, die eine Satellitennavigationszeit empfangen beziehungsweise ermitteln und bei denen eine interne Uhrzeitverstellung größer als eine Sekunde störend ist, anwendbar.In addition to use in a tachograph, the method can also be used in principle in other devices which receive or determine a satellite navigation time and in which an internal time adjustment greater than one second is disruptive.

Die Erfindung wird im Folgenden anhand von Figuren, die Ausführungsbeispiele der vorliegenden Erfindung zeigen, näher erläutert. Es zeigen:

  • Figur 1 einen Verlauf einer Komponente eines Kompensationsparameters zum Angleichen einer internen Zeit eines Tachographen an eine Zeit eines Satellitennavigationssystems in Abhängigkeit von einer ermittelten Zeitdifferenz zwischen der internen Zeit des Tachographen und der Zeit des Satellitennavigationssystems; und
  • Figur 2 eine Ausführungsform eines Tachographen zum Empfangen von Signalen eines Satellitennavigationssystems mit Regelung einer internen Zeit des Tachographen.
The invention is explained in more detail below with reference to figures which show exemplary embodiments of the present invention. Show it:
  • Figure 1 a course of a component of a compensation parameter for matching an internal time of a tachograph to a time of a satellite navigation system as a function of a determined time difference between the internal time the tachograph and time of the satellite navigation system; and
  • Figure 2 an embodiment of a tachograph for receiving signals from a satellite navigation system with control of an internal time of the tachograph.

Figur 1 veranschaulicht ein Verfahren zur Echtzeituhr-Angleichung der internen Uhrzeit eines Tachographen an die Zeit eines Satellitennavigationssystems, beispielsweise an eine GNSS-Zeit. Im ersten Diagramm der Figur 1 ist die Zeitdifferenz beziehungsweise Zeitabweichung zwischen der internen Zeit des Tachographen und einer von einem Satellitennavigationssystem vorgegebenen Zeit tSat aufgetragen. Im unteren Diagramm der Figur 1 ist veranschaulicht, wie eine zeitabhängige Komponente KΔt (Zeitdifferenz-Kompensation-Komponente) eines Kompensationsparameters Kgesamt zum Angleichen der internen Zeit tDTCO des Tachographen an die von dem Satellitennavigationssystem vorgegebene Zeit tSat ermittelt wird. Figure 1 illustrates a method for real-time clock adjustment of the internal time of a tachograph to the time of a satellite navigation system, for example to a GNSS time. In the first diagram of the Figure 1 the time difference or time deviation between the internal time of the tachograph and a time t Sat specified by a satellite navigation system is plotted. In the lower diagram the Figure 1 It is illustrated how a time-dependent component K Δt (time difference compensation component) of a compensation parameter K total is determined in order to adapt the internal time t DTCO of the tachograph to the time t Sat specified by the satellite navigation system.

Der Kompensationsparameter Kgesamt berücksichtigt neben der Paramterkomponente K20°C für Nennabweichung bei 20°C und der Komponente Ktemp, deren Wert temperaturabhängig ist, nun auch die Komponente KΔt, die in Abhängigkeit von der ermittelten Zeitabweichung Δt zwischen der internen Zeit tDTCO des Tachographen und der von dem Satellitennavigationssystem vorgegebenen Zeit tSat ermittelt wird. Der Kompensationsparameter ergibt sich somit zu Kgesamt = K20°C + Ktemp + KΔt. Total of the compensation parameters K takes account of Paramterkomponente K 20 ° C for nominal deviation at 20 ° C and the component K temp, the value of which is temperature dependent, then the component K At, the t as a function of the determined time difference At between the internal time DTCO of the tachograph and the time t Sat specified by the satellite navigation system. The compensation parameter thus results in K total = K 20 ° C + K temp + K Δt .

Gemäß dem Verfahren ist vorgesehen, dass zunächst Signale eines Satellitennavigationssystems, beispielsweise Signale eines GNSS-Systems, empfangen werden. Durch Auswerten der Signale des Satellitennavigationssystems kann die von dem Satellitennavigationssystem vorgegebene Zeit tSat ermittelt werden. Anschließend wird eine Zeitabweichung Δt der internen Zeit tDTCO des Tachographen von der von dem Satellitennavigationssystem vorgegebenen Zeit tSat ermittelt (oberer Kurvenverlauf der Figur 1) . Die Zeitabweichung wird ermittelt zu Δt = t DTCO − t Sat .

Figure imgb0001
According to the method, it is provided that signals from a satellite navigation system, for example signals from a GNSS system, are initially received. The time t Sat specified by the satellite navigation system can be determined by evaluating the signals of the satellite navigation system. A time deviation .DELTA.t of the internal time t DTCO of the tachograph from the time t Sat predetermined by the satellite navigation system is then determined (upper curve profile of FIG Figure 1 ). The time deviation is determined to .delta.t = t DTCO - t Sat ,
Figure imgb0001

Nachfolgend wird die Komponente KΔt des Kompensationsparameters Kgesamt zum Angleichen der internen Zeit tDTCO des Tachographen an die von dem Satellitennavigationssystem vorgegebene Zeit tSat in Abhängigkeit von der ermittelten Zeitabweichung Δt ermittelt. Das Ermitteln der Komponente KΔt des Kompensationsparameters Kgesamt ist im unteren Diagramm der Figur 1 veranschaulicht. Auf dieses Verfahren wird weiter unten noch genauer eingegangen. Schließlich erfolgt das Angleichen der internen Zeit tDTCO des Tachographen an die von dem Satellitennavigationssystem vorgegebene Zeit in Abhängigkeit von dem Kompensationsparameter Kgesamt beziehungsweise der Komponente KΔt des Kompensationsparameters Kgesamt.The component K Δt of the compensation parameter K total is subsequently determined in order to adapt the internal time t DTCO of the tachograph to the time t Sat specified by the satellite navigation system as a function of the determined time deviation Δt. The determination of the component K Δt of the compensation parameter K total is shown in the lower diagram Figure 1 illustrated. This procedure is discussed in more detail below. Finally, the internal time t DTCO of the tachograph is adjusted to the time specified by the satellite navigation system as a function of the compensation parameter K total or the component K Δt of the compensation parameter K total .

Wenn beispielsweise trotz Anwendung der Temperatur-Kompensationsmaßnahmen, das heißt der Berücksichtigung der Parameterkomponenten K20°C und Ktemp, eine bestimmte Zeitabweichung +LimH beziehungsweise -LimH von der Zeit tSat, die von dem Satellitennavigationssystem vorgegeben wird, erkannt wird, wird eine weitere Regelung der Echtzeituhr veranlasst. Diese Nachregulierung ist von der Komponente KΔt des Kompensationsparameters Kgesamt abhängig.If, for example, despite using the temperature compensation measures, i.e. taking into account the parameter components K 20 ° C and K temp , a certain time deviation + Lim H or -Lim H from the time t Sat , which is specified by the satellite navigation system, is detected initiates a further regulation of the real-time clock. This readjustment depends on the component K Δt of the compensation parameter K overall .

Gemäß einer Ausführungsform des Verfahrens ist die zusätzliche Komponente KΔt des Kompensationsparamters Kgesamt von der ermittelten Zeitdifferenz Δt zwischen der internen Zeit tDTCO des Tachographen und der von dem Satellitennavigationssystem vorgegebenen Zeit tSat abhängig. Die Zeitabweichung Δt wird ermittelt aus der Differenz zwischen der internen Zeit tDTCO, die von der internen Uhr des Tachographen vorgegeben wird, und der von dem Satellitensystem vorgegebenen Zeit tSat zu Δt = t DTCO − t Sat .

Figure imgb0002
According to one embodiment of the method, the additional component K Δt of the compensation parameter K overall depends on the determined time difference Δt between the internal time t DTCO of the tachograph and the time t Sat specified by the satellite navigation system. The time deviation .DELTA.t is determined from the difference between the internal time t DTCO , which is specified by the internal clock of the tachograph, and the time t Sat specified by the satellite system .delta.t = t DTCO - t Sat ,
Figure imgb0002

Gemäß einer weiterführenden Ausgestaltung des Verfahrens ist die zusätzliche Komponente KΔt des Kompensationsparamters Kgesamt von dem Zeitdifferenzanstieg zwischen der internen Zeit tDTCO des Tachographen und der von dem Satellitennavigationssystem vorgegebenen Zeit tSat abhängig. Die Komponente KΔt des Kompensationsparameters Kgesamt ist somit nicht nur von der ermittelten Zeitdifferenz Δt, sondern auch von einer Änderung der ermittelten Zeitabweichung Δt während eines vorgegebenen Zeitintervalls abhängig.According to a further embodiment of the method, the additional component K is Δt of the compensation parameter K depends in total on the increase in time difference between the internal time t DTCO of the tachograph and the time t Sat specified by the satellite navigation system. The component K Δt of the compensation parameter K total is therefore not only dependent on the determined time difference Δt, but also on a change in the determined time deviation Δt during a predetermined time interval.

Die Komponente KΔt des Kompensationsparameters Kgesamt wird verändert, wenn die ermittelte Zeitabweichung Δt (Δt = tDTCO - tsat) einen ersten Schwellwert +LimH der Zeitabweichung Δt überschreitet oder einen zweiten Schwellwert -LimH der Zeitabweichung Δt unterschreitet. Der erste Schwellwert +LimH der Zeitabweichung Δt ist ein positiver Wert. Wenn der erste Schwellwert +LimH der Zeitabweichung Δt überschritten wird, eilt die von der internen Uhr (Echtzeituhr) des Tachographen vorgegebene interne Zeit des Tachographen der Zeit tSat des Satellitennavigationssystems voraus. Die interne Uhr des Tachographen geht somit vor. Der zweite Schwellwert -LimH der Zeitabweichung Δt ist ein negativer Wert. Dies bedeutet, dass die interne Zeit tDTCO/die interne Uhr des Tachographen gegenüber der Satellitenzeit tSat nachgeht.The component K Δt of the compensation parameter K total is changed when the determined time deviation Δt (Δt = t DTCO - tsat) exceeds a first threshold value + Lim H of the time deviation Δt or falls below a second threshold value -Lim H of the time deviation Δt. The first threshold value + Lim H of the time deviation Δt is a positive value. If the first threshold value + Lim H of the time deviation Δt is exceeded, the internal time of the tachograph specified by the internal clock (real time clock) of the tachograph leads the time t Sat of the satellite navigation system. The tachograph's internal clock therefore takes precedence. The second threshold value -Lim H of the time deviation Δt is a negative value. This means that the internal time t DTCO / the internal clock of the tachograph follows the satellite time t Sat.

Die Komponente KΔt des Kompensationsparameters Kgesamt wird nun während einer Zeitspanne verändert, bis die ermittelte Zeitabweichung Δt (Δt = tDTCO - tSat) einen dritten Schwellwert +LimL der Zeitabeichung Δt unterschreitet oder einen vierten Schwellwert -LimL der Zeitabeichung Δt überschreitet. Der dritte Schwellwert +LimL der Zeitabeichung Δt ist ein positiver Wert, der kleiner als der erste Schwellwert +LimH der Zeitabeichung Δt ist. Der vierte Schwellwert -LimL der Zeitabeichung Δt ist ein negativer Wert, der größer als der zweite Schwellwert -LimH der Zeitabeichung Δt ist.The component K Δt of the compensation parameter K total is now changed during a period of time until the determined time deviation Δt (Δt = t DTCO - t Sat ) falls below a third threshold value + Lim L of the time deviation Δt or exceeds a fourth threshold value -Lim L of the time deviation Δt , The third threshold value + Lim L of the time deviation Δt is a positive value which is smaller than the first threshold value + Lim H of the time deviation Δt. The fourth threshold value -Lim L of the time deviation Δt is a negative value which is greater than the second threshold value -Lim H of the time deviation Δt.

Der zuletzt ermittelte Wert der Komponente KΔt des Kompensationsparameters Kgesamt wird konstant gehalten, wenn die ermittelte Zeitabweichung Δt den dritten Schwellwert +LimL der Zeitabeichung Δt unterschreitet oder den vierten Schwellwert -LimL der Zeitabeichung Δt überschreitet.The last determined value of the component K Δt of the compensation parameter K total is kept constant if the determined time deviation Δt exceeds the third threshold value + Lim L der Time deviation Δt falls below or exceeds the fourth threshold value -Lim L of time deviation Δt.

Gemäß dem Verfahren wird der zuletzt ermittelte Wert der Komponente KΔt des Kompensationsparameters Kgesamt während einer Zeitspanne konstant gehalten, bis die ermittelte Zeitabweichung Δt den ersten Schwellwert +LimH wieder überschreitet oder den zweiten Schwellwert -LimH wieder unterschreitet.According to the method, the last determined value of the component K Δt of the compensation parameter K overall is kept constant for a period of time until the determined time deviation Δt again exceeds the first threshold value + Lim H or falls below the second threshold value -Lim H again.

Wie in den beiden Diagrammen der Figur 1 veranschaulicht ist, beginnt die zeitliche Kompensation beziehungsweise Angleichung der Echtzeituhr des Tachographen, wenn zum Zeitpunkt A der erste Schwellwert +LimH der Zeitabweichung überschritten wird. Die Komponente KΔt des Kompensationsparameters Kgesamt wird daraufhin solange verändert, bis die Zeitdifferenz Δt zum Zeitpunkt B wieder eine akzeptable Zeitdifferenz-Toleranz zwischen den Schwellwerten +LimL und -LimL erreicht hat. Der zuletzt ermittelte Wert der Komponente KΔt des Kompensationsparameters Kgesamt wird solange konstant gehalten (Zeitdauer zwischen Zeitpunkt B und Zeitpunkt C), bis die Zeitabweichung Δt den oberen Schwellwert +LimH überschreitet beziehungsweise den unteren Schwellwert -LimH unterschreitet.As in the two diagrams of the Figure 1 is illustrated, the time compensation or adjustment of the real-time clock of the tachograph begins when the first threshold value + Lim H of the time deviation is exceeded at time A. The component K Δt of the compensation parameter K total is then changed until the time difference Δt at time B has again reached an acceptable time difference tolerance between the threshold values + Lim L and -Lim L. The last determined value of the component K Δt of the compensation parameter K total is kept constant (time between time B and time C) until the time deviation Δt exceeds the upper threshold + Lim H or falls below the lower threshold -Lim H.

Der beschriebene Algorithmus wird kontinuierlich angewendet. Die dadurch beeinflusste Zeitdifferenz beziehungsweise der dadurch beeinflusste Sekundentakt bleibt typischerweise unterhalb +/-0,1 %. Dadurch kann die Aufzeichnungsgenauigkeit der zeitabhängigen Größen so klein als möglich gehalten werden.The algorithm described is applied continuously. The time difference influenced thereby or the second cycle influenced thereby typically remains below +/- 0.1%. As a result, the recording accuracy of the time-dependent variables can be kept as small as possible.

Figur 2 zeigt eine mögliche Ausführungsform eines Tachographen 100 zum Empfangen von Signalen eines Satellitennavigationssystems 200, wobei die interne Zeit tDTCO, das heißt die interne Uhr 140, des Tachographen geregelt wird. Der Tachograph umfasst einen Empfänger 110 zum Empfangen von Signalen des Satellitennavigationssystems 200. Der Empfänger 110 ist dazu ausgebildet, die von dem Satellitennavigationssystem 200 vorgegebene Zeit tSat durch Auswerten der Signale des Satellitennavigationssystems 200 zu ermitteln. Der Tachograph 100 umfasst des Weiteren eine Auswerteeinrichtung 120 zum Ermitteln der Zeitabweichung Δt der internen Zeit tDTCO des Tachographen 100 von der von dem Satellitennavigationssystem 200 vorgegebenen Zeit tSat. Die Zeitabweichung wird ermittelt aus der Differenz zwischen der internen Zeit tDTCO, die von der internen Uhr 140 des Tachographen (Echtzeituhr) vorgegeben wird, und der von dem Satellitennavigationssystem vorgegebenen Zeit tSat zu Δt = tDTCO - tSat. Figure 2 shows a possible embodiment of a tachograph 100 for receiving signals from a satellite navigation system 200, the internal time t DTCO , that is to say the internal clock 140, of the tachograph being regulated. The tachograph comprises a receiver 110 for receiving signals from the satellite navigation system 200. The receiver 110 is designed to calculate the time t Sat specified by the satellite navigation system 200 by evaluating the signals from the satellite navigation system 200 to investigate. The tachograph 100 further comprises an evaluation device 120 for determining the time deviation Δt of the internal time t DTCO of the tachograph 100 from the time t Sat specified by the satellite navigation system 200. The time deviation is determined from the difference between the internal time t DTCO , which is specified by the internal clock 140 of the tachograph (real time clock), and the time t Sat given by the satellite navigation system to Δt = t DTCO - t Sat.

Der Tachograph umfasst weiterhin eine Steuereinrichtung 130 zum Ermitteln der Komponente KΔt des Kompensationsparameters Kgesamt zum Angleichen der internen Zeit tDTCO des Tachographen 100 an die von dem Satellitennavigationssystem 200 vorgegebene Zeit tsat. Die Steuereinrichtung 130 ist dazu ausgebildet, die Komponente KΔt des Kompensationsparameters Kgesamt in Abhängigkeit von der ermittelten Zeitabweichung Δt zu bestimmen. Die Steuereinrichtung 130 ist insbesondere dazu ausgebildet, die interne Zeit tDTCO der internen Uhr 140 des Tachographen 100 an die von dem Satellitennavigationssystem 200 vorgegebene Zeit tSat in Abhängigkeit von dem Kompensationsparameter Kgesamt anzugleichen.The tachograph further comprises a control device 130 for determining the component K Δt of the compensation parameter K total in order to adapt the internal time t DTCO of the tachograph 100 to the time tsat specified by the satellite navigation system 200. The control device 130 is designed to determine the component K Δt of the compensation parameter K overall as a function of the determined time deviation Δt. The control device 130 is in particular designed to match the internal time t DTCO of the internal clock 140 of the tachograph 100 to the time t Sat predetermined by the satellite navigation system 200 as a function of the compensation parameter K overall .

Gemäß einer möglichen Ausführungsform des Tachographen ist die Steuereinrichtung 130 insbesondere dazu ausgebildet, die Komponente KΔt des Kompensationsparameters Kgesamt in Abhängigkeit von einer Änderung der ermittelten Zeitabweichung Δt während eines Zeitintervalls zu ermitteln.According to a possible embodiment of the tachograph, the control device 130 is in particular designed to determine the component K Δt of the compensation parameter K total as a function of a change in the determined time deviation Δt during a time interval.

Gemäß einer weiteren Ausführungsform des Tachographen ist die Steuereinrichtung 130 dazu ausgebildet, einen Wert der Komponente KΔt des Kompensationsparameters Kgesamt zu verändern, wenn die ermittelte Zeitabweichung Δt den ersten Schwellwert +LimH der Zeitabweichung überschreitet oder den zweiten Schwellwert -LimH der Zeitabweichung unterschreitet.According to a further embodiment of the tachograph, the control device 130 is designed to change a value of the component K Δt of the compensation parameter K overall if the determined time deviation Δt exceeds the first threshold value + Lim H of the time deviation or falls below the second threshold value -Lim H of the time deviation ,

Insbesondere ist die Steuereinrichtung 130 dazu ausgebildet, die Komponente KΔt des Kompensationsparameters Kgesamt während einer Zeitspanne zu verändern, bis die ermittelte Zeitabweichung Δt den dritten Schwellwert +LimL der Zeitabweichung unterschreitet oder den vierten Schwellwert -LimL der Zeitabweichung überschreitet.In particular, the control device 130 is designed to change the component K Δt of the compensation parameter K overall during a period of time until the determined time deviation Δt falls below the third threshold + Lim L of the time deviation or exceeds the fourth threshold -Lim L of the time deviation.

Gemäß einer möglichen Ausführungsform ist die Steuereinrichtung 130 dazu ausgebildet, den zuletzt ermittelten Wert der Komponente KΔt des Kompensationsparameters Kgesamt konstant zu halten, wenn die ermittelte Zeitabweichung Δt den dritten Schwellwert +LimL unterschreitet oder den vierten Schwellwert -LimL überschreitet.According to a possible embodiment, the control device 130 is designed to keep the last determined value of the component K Δt of the compensation parameter K overall constant when the determined time deviation Δt falls below the third threshold value + Lim L or exceeds the fourth threshold value -Lim L.

Die Steuereinrichtung 130 kann weiterhin dazu ausgebildet sein, den zuletzt ermittelten Wert der Komponente KΔt des Kompensationsparameters Kgesamt während einer Zeitspanne ausgehend von dem Unterschreiten des dritten Schwellwerts +LimL beziehungsweise dem Überschreiten des vierten Schwellwerts -LimL konstant zu halten, bis die ermittelte Zeitabweichung Δt den ersten Schwellwert +LimH überschreitet oder den zweiten Schwellwert -LimH unterschreitet.The control device 130 can furthermore be designed to keep the last determined value of the component K Δt of the compensation parameter K total constant over a period of time starting from falling below the third threshold value + Lim L or exceeding the fourth threshold value -Lim L until the determined one Time deviation Δt exceeds the first threshold + Lim H or falls below the second threshold -Lim H.

Claims (14)

Verfahren zum Regeln einer internen Zeit eines Tachographen, umfassend: - Empfangen von Signalen eines Satellitennavigationssystems (200), - Ermitteln der von dem Satellitennavigationssystem (200) vorgegebenen Zeit (tSat) durch Auswerten der Signale des Satellitennavigationssystems (200), - Ermitteln einer Zeitabweichung (Δt) der internen Zeit (tDTCO) des Tachographen (100) von der von dem Satellitennavigationssystem (200) vorgegebenen Zeit (tSat), - Ermitteln einer Komponente (KΔt) eines Kompensationsparameters (Kgesamt) zum Angleichen der internen Zeit (tDTCO) des Tachographen (100) an die von dem Satellitennavigationssystem (200) vorgegebene Zeit (tSat) in Abhängigkeit von der ermittelten Zeitabweichung (Δt), - Angleichen der internen Zeit (tDTCO) des Tachographen (100) an die von dem Satellitennavigationssystem (200) vorgegebene Zeit (tsat) in Abhängigkeit von der Komponente (KΔt) des Kompensationsparameters (Kgesamt) . A method of controlling an internal time of a tachograph, comprising: - receiving signals from a satellite navigation system (200), - Determining the time (t Sat ) predetermined by the satellite navigation system (200) by evaluating the signals of the satellite navigation system (200), Determining a time deviation (Δt) of the internal time (t DTCO ) of the tachograph (100) from the time (t Sat ) predetermined by the satellite navigation system (200), - Determining a component (K Δt ) of a compensation parameter (K total ) in order to adapt the internal time (t DTCO ) of the tachograph (100) to the time (t Sat ) specified by the satellite navigation system (200) as a function of the determined time deviation (Δt ) - Aligning the internal time (t DTCO ) of the tachograph (100) with the time (t sat ) predetermined by the satellite navigation system (200) as a function of the component (K Δt ) of the compensation parameter (K total ). Verfahren nach Anspruch 1, umfassend:
Ermitteln der Komponente (KΔt) des Kompensationsparameters (Kgesamt) in Abhängigkeit von einer Änderung der ermittelten Zeitabweichung (Δt) während eines Zeitintervalls.The method of claim 1, comprising:
Determining the component (K Δt ) of the compensation parameter (K total ) as a function of a change in the determined time deviation (Δt) during a time interval. Verfahren nach einem der Ansprüche 1 oder 2, umfassend:

Verändern der Komponente (KΔt) des Kompensationsparameters (Kgesamt), wenn die ermittelte Zeitabweichung einen ersten Schwellwert (+LimH) der Zeitabweichung überschreitet oder einen zweiten Schwellwert (-LimH) der Zeitabweichung unterschreitet.A method according to claim 1 or 2, comprising:

Changing the component (K Δt ) of the compensation parameter (K total ) when the determined time deviation exceeds a first threshold value (+ Lim H ) of the time deviation or falls below a second threshold value (-Lim H ) of the time deviation. Verfahren nach Anspruch 3,
wobei der erste Schwellwert (+LimH) der Zeitabweichung ein positiver Wert und der zweite Schwellwert (-LimH) der Zeitabweichung ein negativer Wert ist.Method according to claim 3,
wherein the first threshold (+ Lim H ) of the time deviation is a positive value and the second threshold (-Lim H ) of the time deviation is a negative value. Verfahren nach einem der Ansprüche 3 oder 4, umfassend:
Verändern der Komponente (KΔt) des Kompensationsparameters (Kgesamt) während einer Zeitspanne bis die ermittelte Zeitabweichung einen dritten Schwellwert (+LimL) der Zeitabweichung unterschreitet oder einen vierten Schwellwert (-LimL) der Zeitabweichung überschreitet.Method according to one of claims 3 or 4, comprising:
Changing the component (K Δt ) of the compensation parameter (K total ) during a period of time until the determined time deviation falls below a third threshold value (+ Lim L ) of the time deviation or exceeds a fourth threshold value (-Lim L ) of the time deviation. Verfahren nach Anspruch 5,
wobei der dritte Schwellwert (+LimL) der Zeitabweichung ein positiver Wert und der vierte Schwellwert (-LimL) der Zeitabweichung ein negativer Wert ist.Method according to claim 5,
wherein the third threshold (+ Lim L ) of the time deviation is a positive value and the fourth threshold (-Lim L ) of the time deviation is a negative value. Verfahren nach einem der Ansprüche 5 oder 6,
wobei der zuletzt ermittelte Wert der Komponente (KΔt) des Kompensationsparameters (Kgesamt) konstant gehalten wird, wenn die ermittelte Zeitabweichung den dritten Schwellwert (+LimL) der Zeitabweichung unterschreitet oder den vierten Schwellwert (-LimL) der Zeitabweichung überschreitet.Method according to one of claims 5 or 6,
whereby the last determined value of the component (K Δt ) of the compensation parameter (K total ) is kept constant if the determined time deviation falls below the third threshold value (+ Lim L ) of the time deviation or exceeds the fourth threshold value (-Lim L ) of the time deviation. Verfahren nach einem der Ansprüche 5 bis 7,
wobei der zuletzt ermittelte Wert der Komponente (KΔt) des Kompensationsparameters (Kgesamt) während einer weiteren Zeitspanne konstant gehalten wird, bis die ermittelte Zeitabweichung den ersten Schwellwert (+LimH) der Zeitabweichung überschreitet oder den zweiten Schwellwert (-LimH) der Zeitabweichung unterschreitet.Method according to one of claims 5 to 7,
whereby the last determined value of the component (K Δt ) of the compensation parameter (K total ) is kept constant for a further period of time until the determined time deviation exceeds the first threshold value (+ Lim H ) of the time deviation or the second threshold value (-Lim H ) Time difference falls below. Tachograph, umfassend: - einen Empfänger (110) zum Empfangen von Signalen eines Satellitennavigationssystems (200), wobei der Empfänger (110) dazu ausgebildet ist, die von dem Satellitennavigationssystem (200) vorgegebene Zeit (tSat) durch Auswerten der Signale des Satellitennavigationssystems (200) zu ermitteln, - eine Auswerteeinrichtung (120) zum Ermitteln einer Zeitabweichung der internen Zeit (tDTCO) des Tachographen (100) von der von dem Satellitennavigationssystem (200) vorgegebenen Zeit (tSat), - eine Steuereinrichtung (130) zum Ermitteln einer Komponente (KΔt) eines Kompensationsparameters (Kgesamt) zum Angleichen der internen Zeit (tDTCO) des Tachographen (100) an die von dem Satellitennavigationssystem (200) vorgegebene Zeit in Abhängigkeit von der ermittelten Zeitabweichung (Δt), - wobei die Steuereinrichtung (130) dazu ausgebildet ist, die Komponente (KΔt) des Kompensationsparameters (Kgesamt) in Abhängigkeit von der ermittelten Zeitabweichung (Δt) zu bestimmen, - wobei die Steuereinrichtung (130) dazu ausgebildet ist, die interne Zeit (tDTCO) des Tachographen (100) an die von dem Satellitennavigationssystem (200) vorgegebene Zeit (tSat) in Abhängigkeit von dem Kompensationsparameter (Kgesamt) anzugleichen. Tachograph, comprising: - A receiver (110) for receiving signals from a satellite navigation system (200), the receiver (110) being designed to pass the time (t Sat ) predetermined by the satellite navigation system (200) Evaluating the signals of the satellite navigation system (200), an evaluation device (120) for determining a time deviation of the internal time (t DTCO ) of the tachograph (100) from the time (t Sat ) specified by the satellite navigation system (200), - A control device (130) for determining a component (K Δt ) of a compensation parameter (K total ) for adapting the internal time (t DTCO ) of the tachograph (100) to the time specified by the satellite navigation system (200) as a function of the determined time deviation (At), - The control device (130) is designed to determine the component (K Δt ) of the compensation parameter (K total ) as a function of the determined time deviation (Δt), - The control device (130) is designed to adapt the internal time (t DTCO ) of the tachograph (100) to the time (t Sat ) predetermined by the satellite navigation system (200) as a function of the compensation parameter (K total ). Tachograph nach Anspruch 9,
wobei die Steuereinrichtung (130) dazu ausgebildet ist, die Komponente (KΔt) des Kompensationsparameters (Kgesamt) in Abhängigkeit von einer Änderung der ermittelten Zeitabweichung (Δt) während eines Zeitintervalls zu ermitteln.Tachograph according to claim 9,
wherein the control device (130) is designed to determine the component (K Δt ) of the compensation parameter (K total ) as a function of a change in the determined time deviation (Δt) during a time interval. Tachograph nach einem der Ansprüche 9 oder 10,
wobei die Steuereinrichtung (130) dazu ausgebildet ist, einen Wert der Komponente (KΔt) des Kompensationsparameters (Kgesamt) zu verändern, wenn die ermittelte Zeitabweichung (Δt) einen ersten Schwellwert (+LimH) der Zeitabweichung überschreitet oder einen zweiten Schwellwert (-LimH) der Zeitabweichung unterschreitet.Tachograph according to one of claims 9 or 10,
wherein the control device (130) is designed to change a value of the component (K Δt ) of the compensation parameter (K total ) if the determined time deviation (Δt) exceeds a first threshold value (+ Lim H ) of the time deviation or a second threshold value ( -Lim H ) falls below the time deviation. Tachograph nach einem der Ansprüche 9 bis 11,
wobei die Steuereinrichtung (130) dazu ausgebildet ist, die Komponente (KΔt) des Kompensationsparameters (Kgesamt) während einer Zeitspanne zu verändern, bis die ermittelte Zeitabweichung (Δt) einen dritten Schwellwert (+LimL) der Zeitabweichung unterschreitet oder einen vierten Schwellwert (-LimL) der Zeitabweichung überschreitet.Tachograph according to one of claims 9 to 11,
wherein the control device (130) is designed to change the component (K Δt ) of the compensation parameter (K total ) during a period of time until the determined time deviation (Δt) falls below a third threshold value (+ Lim L ) of the time deviation or a fourth threshold value (-Lim L ) of the time deviation. Tachograph nach Anspruch 12,
wobei die Steuereinrichtung (130) dazu ausgebildet ist, den zuletzt ermittelten Wert der Komponente (KΔt) des Kompensationsparameters (Kgesamt) konstant zu halten, wenn die ermittelte Zeitabweichung (Δt) den dritten Schwellwert (+LimL) der Zeitabweichung unterschreitet oder den vierten Schwellwert
(-LimL) der Zeitabweichung überschreitet.Tachograph according to claim 12,
wherein the control device (130) is designed to keep the last determined value of the component (K Δt ) of the compensation parameter (K total ) constant when the determined time deviation (Δt) falls below the third threshold value (+ Lim L ) of the time deviation or the fourth threshold
(-Lim L ) of the time deviation. Tachograph nach einem der Ansprüche 12 oder 13,
wobei die Steuereinrichtung (130) dazu ausgebildet ist, den zuletzt ermittelte Wert der Komponente (KΔt) des Kompensationsparameters (Kgesamt) während einer weiteren Zeitspanne konstant zu halten, bis die ermittelte Zeitabweichung (Δt) den ersten Schwellwert (+LimH) der Zeitabweichung überschreitet oder den zweiten Schwellwert (-LimH) der Zeitabweichung unterschreitet.Tachograph according to one of claims 12 or 13,
wherein the control device (130) is designed to keep the last determined value of the component (K Δt ) of the compensation parameter (K total ) constant for a further period of time until the determined time deviation (Δt) reaches the first threshold value (+ Lim H ) Time deviation exceeds or falls below the second threshold value (-Lim H ) of the time deviation.
EP19190914.2A 2018-08-17 2019-08-09 Tachograph and method for regulating an internal time of a tachograph Active EP3611577B1 (en)

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US6081163A (en) * 1999-01-22 2000-06-27 Advantest Corp. Standard frequency and timing generator and generation method thereof
DE19931685A1 (en) * 1999-07-08 2001-03-01 Timeproof Time Signature Syste Method for producing a time signal
EP1462885A1 (en) * 2003-03-25 2004-09-29 Peugeot Citroen Automobiles S.A. Drift compensation system for a watch in a motor vehicle
US20100045523A1 (en) * 2008-08-21 2010-02-25 Kung-Shuan Huang Methods and apparatus for compensating a clock bias in a gnss receiver
US20120050100A1 (en) * 2010-08-27 2012-03-01 Polly Huang System and method for time synchronization
EP3355134A1 (en) * 2017-01-31 2018-08-01 Continental Automotive GmbH Method for automatically correcting a current time value of an internal system time of an on-board unit for a motor vehicle

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DE102013212106B4 (en) * 2013-06-25 2015-10-08 Continental Automotive Gmbh Method for correcting a first time of a motor vehicle and arrangement for a motor vehicle

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Publication number Priority date Publication date Assignee Title
US6081163A (en) * 1999-01-22 2000-06-27 Advantest Corp. Standard frequency and timing generator and generation method thereof
DE19931685A1 (en) * 1999-07-08 2001-03-01 Timeproof Time Signature Syste Method for producing a time signal
EP1462885A1 (en) * 2003-03-25 2004-09-29 Peugeot Citroen Automobiles S.A. Drift compensation system for a watch in a motor vehicle
US20100045523A1 (en) * 2008-08-21 2010-02-25 Kung-Shuan Huang Methods and apparatus for compensating a clock bias in a gnss receiver
US20120050100A1 (en) * 2010-08-27 2012-03-01 Polly Huang System and method for time synchronization
EP3355134A1 (en) * 2017-01-31 2018-08-01 Continental Automotive GmbH Method for automatically correcting a current time value of an internal system time of an on-board unit for a motor vehicle

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