EP3611577B1 - Tachygraphe et procédé de régulation d'un temps interne du tachygraphe - Google Patents

Tachygraphe et procédé de régulation d'un temps interne du tachygraphe Download PDF

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Publication number
EP3611577B1
EP3611577B1 EP19190914.2A EP19190914A EP3611577B1 EP 3611577 B1 EP3611577 B1 EP 3611577B1 EP 19190914 A EP19190914 A EP 19190914A EP 3611577 B1 EP3611577 B1 EP 3611577B1
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European Patent Office
Prior art keywords
time
tachograph
lim
threshold value
navigation system
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EP19190914.2A
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German (de)
English (en)
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EP3611577A1 (fr
Inventor
Franz Kimmich
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Continental Automotive Technologies GmbH
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Continental Automotive Technologies 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 specified 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 adjusting 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 is temperature-dependent.
  • a satellite navigation receiver such as a GNSS receiver
  • the device-internal time is usually adjusted in second increments to a received time from 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 compared to without the time adjustment.
  • a method for producing a time signal is known.
  • the aim is to synchronize a real-time clock in frequency and phase with a reference time. If a reference time signal fails, the clock should continue to run with great accuracy.
  • US 2010/045523 A1 relates to correcting a time error in a receiver of a satellite navigation system.
  • a concern 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 synchronous 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.
  • 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.
  • the component of the compensation parameter is determined depending on the time deviation determined.
  • the internal time of the tachograph is then adjusted to the time specified by the satellite navigation system depending on the compensation parameter.
  • An embodiment of a tachograph with control of an internal time of the tachograph is specified in claim 7.
  • the tachograph has the features of patent claim 7 and 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 from 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 adjusting 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 depending on the determined time deviation.
  • the control device is designed to adjust the internal time of the tachograph to the time specified by the satellite navigation system depending on the compensation parameter.
  • the tachograph's real-time clock is compensated.
  • the adjustment mechanism is similar to the temperature compensation of a real-time clock.
  • the division factor can be changed from quartz frequency to the second in order to align the internal clock of the tachograph with the time of the satellite navigation system.
  • the tachograph's internal time is adjusted in microsteps to the time of the satellite navigation system, or kept as synchronized as possible. In particular, it is guaranteed that no time adjustment greater than or equal to one second is necessary within the tachograph. This allows the data to be recorded correctly in the tachograph.
  • the method can also be used in other devices that receive or determine a satellite navigation time and in which an internal time adjustment of more 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.
  • a time-dependent component K ⁇ t (time difference compensation component) of a compensation parameter K overall is determined to adjust the internal time t DTCO of the tachograph to the time t Sat specified by the satellite navigation system.
  • the compensation parameter K In addition to the parameter component K 20°C for nominal deviation at 20°C and the component K temp , whose value is temperature-dependent, the compensation parameter K overall now also takes into account the component K ⁇ t , which depends on the determined time deviation ⁇ t between the internal time t 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
  • signals from a satellite navigation system are first received.
  • the time t Sat specified by the satellite navigation system can be determined.
  • a time deviation ⁇ t of the internal time t DTCO of the tachograph from the time t Sat specified by the satellite navigation system is then determined (upper curve of the Figure 1 ).
  • the component K ⁇ t of the compensation parameter K overall is determined to adjust 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. Determining the component K ⁇ t of the compensation parameter K overall is shown in the bottom diagram Figure 1 illustrated. This procedure will be 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 depending on 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 as a whole 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 overall depends on the time difference increase 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 overall is therefore dependent not only 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 is ahead of the time t Sat of the satellite navigation system. The tachograph's internal clock is therefore ahead.
  • the second threshold value -Lim H of the time deviation ⁇ t is a negative value. This means that the internal time t DTCO / the tachograph's internal clock lags behind the satellite time tsat.
  • the third threshold value +Lim L of the time calibration ⁇ t is a positive value that is smaller than the first threshold value +Lim H of the time calibration ⁇ t.
  • the fourth threshold value -Lim L of the time calibration ⁇ t is a negative value that is greater than the second threshold value -Lim H of the time calibration ⁇ t.
  • the last determined value of the component K ⁇ t of the compensation parameter K overall is kept constant if the determined time deviation ⁇ t exceeds the third threshold value +Lim L der Time calibration ⁇ t falls below or exceeds the fourth threshold value -Lim L of time calibration ⁇ 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 exceeds the first threshold value +Lim H again or falls below the second threshold value -Lim H again.
  • the time compensation or adjustment of the tachograph's real-time clock 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 overall 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 overall is kept constant (duration 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 or the second cycle influenced thereby typically remains below +/-0.1%. This allows the recording accuracy of the time-dependent variables to 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, wherein the internal time t DTCO , i.e. the internal clock 140, of the tachograph is regulated.
  • the tachograph includes a receiver 110 for receiving signals from the satellite navigation system 200.
  • the receiver 110 is designed to measure the time tSat specified by the satellite navigation system 200 by evaluating the signals from the satellite navigation system 200 to determine.
  • the tachograph 100 further includes 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 for adjusting the internal time t DTCO of the tachograph 100 to the time t Sat 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 designed in particular to adjust the internal time t DTCO of the internal clock 140 of the tachograph 100 to the time t Sat specified by the satellite navigation system 200 as a whole depending on the compensation parameter K.
  • control device 130 is designed in particular to determine the component K ⁇ t of the compensation parameter K overall 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 when 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 value +Lim L of the time deviation or exceeds the fourth threshold value -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 constant overall 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 further be designed to keep the last determined value of the component K ⁇ t of the compensation parameter K total constant during 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 Time deviation ⁇ t exceeds the first threshold value +Lim H or falls below the second threshold value -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)

Claims (10)

  1. Procédé de régulation d'un temps interne d'un tachygraphe, ledit procédé comprenant les étapes suivantes :
    - recevoir des signaux d'un système de navigation par satellite (200),
    - déterminer le temps (tSat), spécifié par le système de navigation par satellite (200), par évaluation des signaux du système de navigation par satellite (200),
    - déterminer un écart de temps (Δt) entre le temps interne (tDTCO) du tachygraphe (100) et le temps (tSat) spécifié par le système de navigation par satellite (200),
    - déterminer une composante (KΔt) d'un paramètre de compensation (Kgesamt) pour caler le temps interne (tDTCO) du tachygraphe (100) sur le temps (tsat), spécifié par le système de navigation par satellite (200), en fonction de l'écart de temps déterminé (Δt),
    - caler le temps interne (tDTCO) du tachygraphe (100) sur le temps (tsat), spécifié par le système de navigation par satellite (200), en fonction de la composante (KΔt) du paramètre de compensation (Kgesamt),
    - si l'écart de temps déterminé devient supérieur à une première valeur seuil (+LimH) de l'écart de temps, modifier la composante (KΔt) du paramètre de compensation (Kgesamt) pendant une durée allant jusqu'à ce que l'écart de temps déterminé devienne inférieur à une troisième valeur seuil (+LimL) de l'écart de temps,
    - si l'écart de temps déterminé devient inférieur à une deuxième valeur seuil (-LimH) de l'écart de temps, modifier la composante (KΔt) du paramètre de compensation (Kgesamt) pendant une durée allant jusqu'à ce que l'écart de temps déterminé devienne supérieur à une quatrième valeur seuil (-LimL) de l'écart de temps.
  2. Procédé selon la revendication 1, ledit procédé comprenant les étapes suivantes :
    déterminer la composante (KΔt) du paramètre de compensation (Kgesamt) en fonction d'une modification de l'écart de temps déterminé (Δt) pendant un intervalle de temps.
  3. Procédé selon la revendication 1 ou 2,
    la première valeur seuil (+LimH) de l'écart de temps étant une valeur positive et la deuxième valeur seuil (-LimH) de l'écart de temps étant une valeur négative.
  4. Procédé selon l'une des revendications précédentes,
    le troisième seuil (+LimL) de l'écart de temps étant une valeur positive et le quatrième seuil (-LimL) de l'écart de temps étant une valeur négative.
  5. Procédé selon l'une des revendications précédentes,
    la dernière valeur déterminée de la composante (KΔt) du paramètre de compensation (Kgesamt) étant maintenue constante si l'écart de temps déterminé devient inférieur à la troisième valeur seuil (+LimL) de l'écart de temps ou devient supérieur à la quatrième valeur seuil (-LimL) de l'écart de temps.
  6. Procédé selon l'une des revendications précédentes,
    la dernière valeur déterminée de la composante (KΔt) du paramètre de compensation (Kgesamt) étant maintenue constante pendant une durée supplémentaire jusqu'à ce que l'écart de temps déterminé devienne supérieur à la première valeur seuil (+LimH) de l'écart de temps ou devienne inférieur à la deuxième valeur seuil (-LimH) de l'écart de temps.
  7. Tachygraphe comprenant :
    - un récepteur (110) destiné à recevoir des signaux d'un système de navigation par satellite (200), le récepteur (110) étant conçu pour déterminer le temps (tSat), spécifié par le système de navigation par satellite (200), par évaluation des signaux du système de navigation par satellite (200),
    - un dispositif d'évaluation (120) destiné à déterminer un écart de temps entre le temps interne (tDTCO) du tachygraphe (100) et le temps (tsat) spécifié par le système de navigation par satellite (200),
    - un dispositif de commande (130) destiné à déterminer une composante (KΔt) d'un paramètre de compensation (Kgesamt) pour caler le temps interne (tDTCO) du tachygraphe (100) sur le temps, spécifié par le système de navigation par satellite (200), en fonction de l'écart de temps déterminé (Δt),
    - le dispositif de commande (130) étant conçu pour déterminer la composante (KΔt) du paramètre de compensation (Kgesamt) en fonction de l'écart de temps déterminé (Δt),
    - le dispositif de commande (130) étant conçu pour caler le temps interne (tDTCO) du tachygraphe (100) sur le temps (tSat), spécifié par le système de navigation par satellite (200), en fonction du paramètre de compensation (Kgesamt),
    - le dispositif de commande (130) étant conçu pour modifier, si l'écart de temps déterminé (Δt) devient supérieur à une première valeur seuil (+LimH) de l'écart de temps, la composante (KΔt) du paramètre de compensation (Kgesamt) pendant une durée allant jusqu'à ce que l'écart de temps déterminé (Δt) devienne inférieur à une troisième valeur seuil (+LimL) de l'écart de temps, et
    - le dispositif de commande (130) étant conçu pour modifier, si l'écart de temps déterminé (Δt) devient inférieur à une deuxième valeur seuil (-LimH) de l'écart de temps, la composante (KΔt) du paramètre de compensation (Kgesamt) pendant une durée allant jusqu'à ce que l'écart de temps déterminé (Δt) devienne supérieur à une quatrième valeur seuil (-LimL) de l'écart de temps.
  8. Tachygraphe selon la revendication 7,
    le dispositif de commande (130) étant conçu pour déterminer la composante (KΔt) du paramètre de compensation (Kgesamt) en fonction d'une modification de l'écart de temps déterminé (Δt) pendant un intervalle de temps.
  9. Tachygraphe selon la revendication 7 ou 8,
    le dispositif de commande (130) étant conçu pour maintenir constante la dernière valeur déterminée de la composante (KΔt) du paramètre de compensation (Kgesamt) si l'écart de temps déterminé (Δt) devient inférieur à la troisième valeur seuil (+LimL) de l'écart de temps ou devient supérieur à la quatrième valeur seuil (-LimL) de l'écart de temps.
  10. Tachygraphe selon l'une des revendications 7 à 9,
    le dispositif de commande (130) étant conçu pour maintenir constante la dernière valeur déterminée de la composante (KΔt) du paramètre de compensation (Kgesamt) pendant une durée supplémentaire allant jusqu'à ce que l'écart de temps déterminé (Δt) devienne supérieur à la première valeur seuil (+LimH) de l'écart de temps ou devienne inférieur à la deuxième valeur seuil (-LimH) de l'écart de temps.
EP19190914.2A 2018-08-17 2019-08-09 Tachygraphe et procédé de régulation d'un temps interne du tachygraphe Active EP3611577B1 (fr)

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DE102018213906.7A DE102018213906A1 (de) 2018-08-17 2018-08-17 Tachograph und Verfahren zum Regeln einer internen Zeit des Tachographen

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EP3611577B1 true EP3611577B1 (fr) 2024-01-03

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
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 (de) * 1999-07-08 2001-03-01 Timeproof Time Signature Syste Verfahren zur Herstellung eines Zeitsignals
FR2853093B1 (fr) * 2003-03-25 2005-09-30 Systeme de compensation des derives d'une horloge pour vehicule automobile
US7924104B2 (en) * 2008-08-21 2011-04-12 Mediatek Inc. Methods and apparatus for compensating a clock bias in a GNSS receiver
TWI415497B (zh) * 2010-08-27 2013-11-11 Univ Nat Taiwan 時間同步裝置、系統及其方法
DE102013212106B4 (de) * 2013-06-25 2015-10-08 Continental Automotive Gmbh Verfahren zum Korrigieren einer ersten Uhrzeit eines Kraftfahrzeugs und Anordnung für ein Kraftfahrzeug
DE102017201562A1 (de) * 2017-01-31 2018-08-02 Continental Automotive Gmbh Verfahren zum automatischen Korrigieren eines aktuellen Zeit-Wertes einer internen Systemzeit einer On-Board-Unit für ein Kraftfahrzeug

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