EP2605227A1 - Motor vehicle assistance system and method for generating, controlling and triggering break recommendations and motor vehicle - Google Patents

Motor vehicle assistance system and method for generating, controlling and triggering break recommendations and motor vehicle Download PDF

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Publication number
EP2605227A1
EP2605227A1 EP12193135.6A EP12193135A EP2605227A1 EP 2605227 A1 EP2605227 A1 EP 2605227A1 EP 12193135 A EP12193135 A EP 12193135A EP 2605227 A1 EP2605227 A1 EP 2605227A1
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Prior art keywords
driver
activity
motor vehicle
recommendation
driving
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EP12193135.6A
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German (de)
French (fr)
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EP2605227B1 (en
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Thorb Baumgarten
Carsten Gehring
Andreas Hauptvogel
Andreas Leicher
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Volkswagen AG
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Volkswagen AG
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/06—Alarms for ensuring the safety of persons indicating a condition of sleep, e.g. anti-dozing alarms

Definitions

  • the invention relates to a motor vehicle assistance system and a method for generating, controlling and triggering a break recommendation to a driver and a motor vehicle.
  • a vigilance state ie an attention state
  • the aim of these methods is to improve road safety by detecting and alerting the driver to unusual behavior.
  • the unusual behavior can arise here, for example, by inattention or fatigue.
  • the reactivity of the driver of the motor vehicle is so influenced by fatigue that reflexes or reactions to certain driving situations take place more slowly, more slowly and / or more uncertainly.
  • this is off DE 102 55 544 A1 a motor vehicle assistance system with a tiredness prediction device for the prediction of a state of fatigue of a driver of a motor vehicle known.
  • the fatigue prediction device has an input device for inputting person-specific information by the driver of the motor vehicle, an evaluation device for calculating the state of tiredness of the driver of the motor vehicle at least one specific time on the basis of the input information.
  • the state of tiredness is calculated by means of a suitable mathematical model on the basis of the entered person-specific information of the driver.
  • An evaluation device of the fatigue prediction device calculates fatigue states of the driver at a plurality of future times and makes pause suggestions for the vehicle driver.
  • At least one driving task to the driver can be taken into account by recording vehicle-specific and / or environment-specific measured values.
  • the invention has for its object to provide a motor vehicle assistance system and a method of the generic type, by means of which in a simple manner a variable pause recommendation to a driver is possible.
  • the motor vehicle assistance system comprises an output device for outputting a pause recommendation to the vehicle driver, an evaluation device for calculating the pause recommendation, a first input device for inputting at least one driving task to the evaluation device and a second input device for inputting at least one driver activity, it is advantageously possible to based on a calculated on the basis of the at least one driving task pause recommendation to optimize this due to the at least one driver activity of the driver. In particular, individual driver activities can be taken into account during the break recommendation.
  • the pause recommendation can be issued at a time earlier or later than the pause recommendation calculated on the basis of the at least one driving task.
  • this variable pause recommendation which is dependent on the driver's activity, an expected course of the journey into the future can be projected and the optimum time derived therefrom for a pause recommendation can be calculated.
  • the object is further achieved by a method with the features mentioned in claim 2.
  • a method with the features mentioned in claim 2.
  • the object is also achieved by a motor vehicle with the features mentioned in claim 10.
  • FIG. 1 shows a block diagram of a total of 10 designated motor vehicle assistance system.
  • the motor vehicle assistance system 10 comprises a first input device 12 for inputting at least one driving task.
  • the input device 12 is connected to an evaluation device 14.
  • the evaluation device 14 comprises a memory means 16 and a control circuit 18 for processing the information supplied by the input device 12.
  • the evaluation device 14 is connected to a pause recommendation module 20.
  • the pause recommendation module 20 is connected to a second input device 22 for inputting at least one driver activity.
  • the pause recommendation module 20 includes a control circuit 24.
  • the pause recommendation module 20 is connected to a pause recommendation adaptation module 26.
  • the pause recommendation adaptation module 26 is connected to an output device 28.
  • the evaluation device 14 also receives information about the degree of automation of the motor vehicle. This is, for example, the presence and activation of a cruise control system (GRA), an automatic cruise control (ACC), a lane assistant (LaneAssist) or the like.
  • GAA cruise control system
  • ACC automatic cruise control
  • LiAssist lane assistant
  • the evaluation device 14 are also available information on the driving context, such as time of day, seat occupancy, loading condition or the like available.
  • the degree of automation of the motor vehicle and the driving context is stored in the memory means 16 travel time characteristics and the control circuit 18 of the at least one driving task on average optimally adjusted travel time, after their lapse a break should be done.
  • This pause recommendation determined according to the driving context and monotony of the driving task is communicated to the pause recommendation module 20.
  • the pause recommendation module 20 receives information about at least one driver activity of the vehicle driver via the input device 22 and links these driver activities to a driver activity pattern.
  • Information about a steering movement, brake pedal actuation, accelerator pedal operation, clutch actuation, gear selection, turn signal actuation, current infotainment settings, climate settings, navigation settings, telephone activities and the like are available via the input device 22, for example.
  • this activity index may be -2 to +2.
  • the value -2 stands, for example, for high control and operating activity with simultaneously low control quality and driving performance.
  • the activity index +2 stands, for example, for high control and operating activity with simultaneously high control quality and driving performance.
  • the activity index -1 stands, for example, for low control and operating activity with low control quality and mileage and the activity index +1 stands, for example, for lower control and operating activity with high control quality and mileage.
  • this activity index is adapted with the pause recommendation provided by the evaluation device 14.
  • This activity-moderated pause recommendation is communicated to the pause recommendation adaptation module 26, which supplies the output device 28 with corresponding information.
  • the output of the break recommendation can be done visually and / or acoustically.
  • an optimal pause recommendation adapted to the different motor vehicle drivers according to their specific driver activity pattern can be given. This may include a shift of the pause recommendation to an earlier or a later time according to the actual driving activity pattern.
  • the duration of a maximum possible displacement, both with regard to a reduction and an extension of the travel time to the next pause recommendation may be limited and, for example, vary +/- 1 hour to the pause recommendation predetermined by the evaluation device 14.
  • the rule-based algorithm for taking driver activity into account can be used to implement the function of an expected course into the future. Although the activity-adapted break recommendation still results in a fluctuation range of a maximum of +/- 1 hour, a reliable trend towards the reproduction of an optimal break recommendation is possible.
  • the adaptation of the break recommendation provided by the evaluation unit to the activity index can be carried out at fixed or determinable time intervals, for example every minute.
  • an adaptation of the pause recommendation is continuously possible.
  • An update of the break recommendation is thus possible.
  • FIG. 2 shows in a characteristic curve 30 the break index adapted by the activity index.
  • the calculated time t P is plotted here until the break recommendation.
  • the average distance to the recommended break determined by the calculated vigilance index by the evaluation device 14 is influenced by the activity index superimposed on time intervals.
  • the time until the break recommendation is shortened or extended. That is, calculated by the evaluation unit waveform for the break recommendation is either raised or lowered over the travel time. This results in an adapted pause recommendation either for an earlier pause warning PW f , a later pause warning PW s or the mean pause warning PW m is retained.
  • the course of the characteristic curve 30 initially corresponds to the vigilance index determined by the evaluation device 14.
  • the sections 32 of the characteristic curve 30 illustrate the course according to the vigilance index.
  • an adaptation of the characteristic curve 30 takes place in the sections 34 corresponding to the activity index.
  • the characteristic 30 is raised or lowered, so that the distance to the pause recommendation changes.
  • the time of the travel time t F is reached at which the pause should actually be engaged.
  • FIG. 3 shows in a schematic plan view of a motor vehicle 36.
  • the motor vehicle 36 includes the motor vehicle assistance system 10, which is integrated, for example, in a control unit 38.
  • the output can be acoustically and / or optically and / or haptically.

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  • Physics & Mathematics (AREA)
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Abstract

The system (10) has an output device (28) for outputting rest recommendation to a driver of vehicle. An evaluating device (14) computes the rest recommendation, and an input device (12) inputs a driving task to the evaluating device. Another input device (22) inputs driver's activity. The evaluation device comprises a storage unit (16) and a control circuit (18) for processing information delivered by the former input device. The evaluation device is connected with a rest recommendation module (20) that is connected to the latter input device. The driving task is performed under consideration of speed, road type, curvedness, traffic density, weather and/or visibility conditions. An independent claim is also included for a method for generating, controlling and triggering a rest recommendation to a driver of a vehicle.

Description

Die Erfindung betrifft ein Kraftfahrzeug-Assistenzsystem sowie ein Verfahren zum Erzeugen, Steuern und Auslösen einer Pausenempfehlung an einen Fahrzeugführer und ein Kraftfahrzeug.The invention relates to a motor vehicle assistance system and a method for generating, controlling and triggering a break recommendation to a driver and a motor vehicle.

Um die Sicherheit im Straßenverkehr durch Erkennen von Unaufmerksamkeiten oder Müdigkeit eines Kraftfahrzeugführers zu verbessern, sind Verfahren zur Bestimmung eines Vigilanzzustandes, also eines Aufmerksamkeitszustandes, des Kraftfahrzeugführers bekannt. Das Ziel dieser Verfahren ist es, die Sicherheit im Straßenverkehr zu verbessern, indem ein ungewöhnliches Verhalten des Kraftfahrzeugführers detektiert wird und darauf aufmerksam gemacht wird. Das ungewöhnliche Verhalten kann hierbei beispielsweise durch Unaufmerksamkeit oder Müdigkeit entstehen. Zumeist wird durch Müdigkeit das Reaktionsvermögen des Kraftfahrzeugführers derart beeinflusst, das Reflexe oder Reaktionen auf bestimmte Fahrsituationen langsamer, zeitverzögerter und/oder unsicherer erfolgen.In order to improve road safety by detecting inattentiveness or fatigue of a motor vehicle driver, methods for determining a vigilance state, ie an attention state, of the motor vehicle driver are known. The aim of these methods is to improve road safety by detecting and alerting the driver to unusual behavior. The unusual behavior can arise here, for example, by inattention or fatigue. In most cases, the reactivity of the driver of the motor vehicle is so influenced by fatigue that reflexes or reactions to certain driving situations take place more slowly, more slowly and / or more uncertainly.

So ist beispielsweise aus DE 102 55 544 A1 ein Kraftfahrzeug-Assistenzsystem mit einer Müdigkeits-Prädikationseinrichtung für die Vorhersage eines Müdigkeitszustandes eines Fahrers eines Kraftfahrzeuges bekannt. Die Müdigkeits-Prädikationseinrichtung weist hierbei eine Eingabevorrichtung zum Eingeben von personenspezifischen Informationen durch den Fahrer des Kraftfahrzeuges, eine Auswertevorrichtung zum Berechnen des Müdigkeitszustandes des Fahrers des Kraftfahrzeuges zu wenigstens einem bestimmten Zeitpunktes auf der Basis der eingegebenen Informationen auf. Hierbei wird der Müdigkeitszustand mithilfe eines geeigneten mathematischen Modells auf der Basis der eingegebenen personenspezifischen Informationen des Fahrers berechnet. Eine Auswertevorrichtung der Müdigkeits-Prädikationseinrichtung berechnet Müdigkeitszustände des Fahrers zu mehreren in der Zukunft liegenden Zeitpunkten und unterbreitet Pausenvorschläge für den Fahrzeugführer.For example, this is off DE 102 55 544 A1 a motor vehicle assistance system with a tiredness prediction device for the prediction of a state of fatigue of a driver of a motor vehicle known. In this case, the fatigue prediction device has an input device for inputting person-specific information by the driver of the motor vehicle, an evaluation device for calculating the state of tiredness of the driver of the motor vehicle at least one specific time on the basis of the input information. In this case, the state of tiredness is calculated by means of a suitable mathematical model on the basis of the entered person-specific information of the driver. An evaluation device of the fatigue prediction device calculates fatigue states of the driver at a plurality of future times and makes pause suggestions for the vehicle driver.

Bei der Berechnung des Müdigkeitszustandes des Fahrers kann wenigstens eine Fahraufgabe an den Fahrer durch Erfassung von fahrzeugspezifischen und/oder umgebungsspezifischen Messwerten berücksichtigt werden.When calculating the tiredness state of the driver, at least one driving task to the driver can be taken into account by recording vehicle-specific and / or environment-specific measured values.

Der Erfindung liegt die Aufgabe zugrunde, ein Kraftfahrzeug-Assistenzsystem und ein Verfahren der gattungsgemäßen Art anzugeben, mittels denen in einfacher Weise eine variable Pausenempfehlung an einen Fahrzeugführer möglich ist.The invention has for its object to provide a motor vehicle assistance system and a method of the generic type, by means of which in a simple manner a variable pause recommendation to a driver is possible.

Erfindungsgemäß wird diese Aufgabe mittels eines Kraftfahrzeug-Assistenzsystems mit den in Anspruch 1 genannten Merkmalen gelöst. Dadurch, dass das Kraftfahrzeug-Assistenzsystem eine Ausgabeeinrichtung zum Ausgeben einer Pausenempfehlung an den Fahrzeugführer, eine Auswerteeinrichtung zur Berechnung der Pausenempfehlung, eine erste Eingabeeinrichtung zur Eingabe wenigstens einer Fahraufgabe an die Auswerteeinrichtung und eine zweite Eingabeeinrichtung zur Eingabe mindestens einer Fahreraktivität umfasst, ist vorteilhaft möglich, basierend auf einer aufgrund der wenigstens einen Fahraufgabe berechneten Pausenempfehlung diese aufgrund der mindestens einen Fahreraktivität des Fahrzeugführers zu optimieren. Insbesondere können so individuelle Fahreraktivitäten bei der Pausenempfehlung berücksichtigt werden. Es erfolgt also eine Anpassung der Pausenempfehlung entsprechend der Fahreraktivität, das heißt, die Pausenempfehlung kann auf einen zeitlich früheren oder zeitlich späteren Zeitpunkt gegenüber der auf der Basis der wenigstens einen Fahraufgabe berechneten Pausenempfehlung herausgegeben werden. Durch diese von der Fahreraktivität abhängige variable Pausenempfehlung kann ein erwarteter Verlauf der Fahrt in die Zukunft projiziert werden und sich der hieraus abgeleitete optimale Zeitpunkt für eine Pausenempfehlung berechnet werden.According to the invention this object is achieved by means of a motor vehicle assistance system with the features mentioned in claim 1. By virtue of the fact that the motor vehicle assistance system comprises an output device for outputting a pause recommendation to the vehicle driver, an evaluation device for calculating the pause recommendation, a first input device for inputting at least one driving task to the evaluation device and a second input device for inputting at least one driver activity, it is advantageously possible to based on a calculated on the basis of the at least one driving task pause recommendation to optimize this due to the at least one driver activity of the driver. In particular, individual driver activities can be taken into account during the break recommendation. There is thus an adaptation of the pause recommendation according to the driver's activity, that is to say the pause recommendation can be issued at a time earlier or later than the pause recommendation calculated on the basis of the at least one driving task. By means of this variable pause recommendation, which is dependent on the driver's activity, an expected course of the journey into the future can be projected and the optimum time derived therefrom for a pause recommendation can be calculated.

Erfindungsgemäß wird die Aufgabe ferner durch ein Verfahren mit den in Anspruch 2 genannten Merkmalen gelöst. Dadurch, dass zum Erzeugen, Steuern und Auslösen einer Pausenempfehlung an einen Fahrzeugführer wenigstens eine Fahraufgabe des Fahrzeugführers ermittelt, mithilfe eines vorgegebenen Vigilanzindex eine Pausenempfehlung errechnet wird, wenigstens eine Fahreraktivität des Fahrzeugsführers ermittelt wird und die Pausenempfehlung aufgrund der wenigstens einen ermittelten Fahreraktivität korrigiert wird, ist vorteilhaft möglich, eine Pausenempfehlung an den Fahrzeugführer auszugeben, die anhand der tatsächlichen Fahreraktivität eine optimierte Pausenempfehlung ermöglicht.According to the invention the object is further achieved by a method with the features mentioned in claim 2. The fact that for generating, controlling and triggering a break recommendation to a driver determines at least one driving task of the driver, using a predetermined vigilance index a break recommendation is calculated, at least one driver activity of the driver is determined and the break recommendation is corrected due to the at least one determined driver activity is advantageously possible to issue a break recommendation to the driver, which allows based on the actual driver activity an optimized pause recommendation.

Erfindungsgemäß wird die Aufgabe darüber hinaus durch ein Kraftfahrzeug mit den im Anspruch 10 genannten Merkmalen gelöst.According to the invention, the object is also achieved by a motor vehicle with the features mentioned in claim 10.

Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den übrigen, in den Unteransprüchen genannten Merkmalen.Further preferred embodiments of the invention will become apparent from the remaining, mentioned in the dependent claims characteristics.

Der Erfindung wird nachfolgend in einem Ausführungsbeispiel anhand der zugehörigen Zeichnungen näher erläutert. Es zeigen:

Figur 1
ein Blockschaltbild eines Kraftfahrzeug-Assistenzsystems;
Figur 2
einen variablen Pausenempfehlungsverlauf über der Fahrzeit und
Figur 3
schematisch ein Kraftfahrzeug mit dem erfindungsgemäßen Kraftfahrzeug-Assistenzsystem.
The invention will be explained in more detail in an embodiment with reference to the accompanying drawings. Show it:
FIG. 1
a block diagram of a motor vehicle assistance system;
FIG. 2
a variable pause recommendation course over the travel time and
FIG. 3
schematically a motor vehicle with the motor vehicle assistance system according to the invention.

Figur 1 zeigt ein Blockschaltbild eines insgesamt mit 10 bezeichneten Kraftfahrzeug-Assistenzsystems. Das Kraftfahrzeug-Assistenzsystem 10 umfasst eine erste Eingabeeinrichtung 12 zur Eingabe wenigstens einer Fahraufgabe. Die Eingabeeinrichtung 12 ist mit einer Auswerteeinrichtung 14 verbunden. Die Auswerteeinrichtung 14 umfasst ein Speichermittel 16 und einen Regelkreis 18 zur Verarbeitung der von der Eingabeeinrichtung 12 gelieferten Informationen. FIG. 1 shows a block diagram of a total of 10 designated motor vehicle assistance system. The motor vehicle assistance system 10 comprises a first input device 12 for inputting at least one driving task. The input device 12 is connected to an evaluation device 14. The evaluation device 14 comprises a memory means 16 and a control circuit 18 for processing the information supplied by the input device 12.

Die Auswerteeinrichtung 14 ist mit einem Pausenempfehlungsmodul 20 verbunden. Das Pausenempfehlungsmodul 20 ist mit einer zweiten Eingabeeinrichtung 22 zur Eingabe mindestens einer Fahreraktivität verbunden. Das Pausenempfehlungsmodul 20 umfasst einen Regelkreis 24. Das Pausenempfehlungsmodul 20 ist mit einem Pausenempfehlungsadaptionsmodul 26 verbunden. Das Pausenempfehlungsadaptionsmodul 26 ist mit einer Ausgabeeinrichtung 28 verbunden.The evaluation device 14 is connected to a pause recommendation module 20. The pause recommendation module 20 is connected to a second input device 22 for inputting at least one driver activity. The pause recommendation module 20 includes a control circuit 24. The pause recommendation module 20 is connected to a pause recommendation adaptation module 26. The pause recommendation adaptation module 26 is connected to an output device 28.

Das in Figur 1 dargestellte Kraftfahrzeug-Assistenzsystem 10 zeigt folgende Funktion:

  • Über die Eingabeeinrichtung 12 wird der Auswerteeinrichtung 14 wenigstens eine von einem Fahrzeugführer zu absolvierende Fahraufgabe entsprechende Information übergeben. Die Fahraufgaben sind beispielsweise Geschwindigkeit, Straßentyp, Kurvigkeit, Verkehrsdichte, Witterung, Sichtbedingungen. Diese Informationen können beispielsweise von einer Navigationseinrichtung des Kraftfahrzeuges und/oder Telediensten von zentralen Informationsdiensten erhalten werden.
This in FIG. 1 illustrated motor vehicle assistance system 10 has the following function:
  • About the input device 12 of the evaluation device 14 is passed at least one of a driver to be completed driving task corresponding information. The driving tasks are, for example, speed, road type, curvature, traffic density, weather conditions, visibility conditions. This information can be obtained, for example, from a navigation device of the motor vehicle and / or teleservices from central information services.

Die Auswerteeinrichtung 14 erhält ferner Informationen über den Automatisierungsgrad des Kraftfahrzeuges. Dies ist beispielsweise das Vorhandensein und Aktivschalten einer Geschwindigkeitsregelanlage (GRA), einer automatischen Geschwindigkeitskontrolle (ACC), eines Spurassistenten (LaneAssist) oder dergleichen.The evaluation device 14 also receives information about the degree of automation of the motor vehicle. This is, for example, the presence and activation of a cruise control system (GRA), an automatic cruise control (ACC), a lane assistant (LaneAssist) or the like.

Der Auswerteeinrichtung 14 stehen ferner Informationen zum Fahrkontext, beispielsweise Tageszeit, Sitzbelegung, Beladungszustand oder dergleichen, zur Verfügung.The evaluation device 14 are also available information on the driving context, such as time of day, seat occupancy, loading condition or the like available.

Aus den der Auswerteeinrichtung 14 zur Verfügung stehenden Informationen über die wenigstens eine Fahraufgabe, den Automatisierungsgrad des Kraftfahrzeuges und den Fahrkontext wird über im Speichermittel 16 abgelegte Fahrzeitkennlinien und den Regelkreis 18 eine der wenigstens einen Fahraufgabe im Mittel optimal angepasste Fahrzeit errechnet, nach deren Verstreichen eine Pause gemacht werden sollte. Diese nach Fahrkontext und Monotonie der Fahraufgabe ermittelte Pausenempfehlung wird dem Pausenempfehlungsmodul 20 mitgeteilt.From the evaluation device 14 available information about the at least one driving task, the degree of automation of the motor vehicle and the driving context is stored in the memory means 16 travel time characteristics and the control circuit 18 of the at least one driving task on average optimally adjusted travel time, after their lapse a break should be done. This pause recommendation determined according to the driving context and monotony of the driving task is communicated to the pause recommendation module 20.

Das Pausenempfehlungsmodul 20 erhält über die Eingabeeinrichtung 22 Informationen über wenigstens eine Fahreraktivität des Fahrzeugfahrers und verknüpft diese Fahreraktivitäten zu einem Fahreraktivitätsmuster. Über die Eingabeeinrichtung 22 stehen beispielsweise Informationen über eine Lenkbewegung, Bremspedalbetätigung, Gaspedalbetätigung, Kupplungsbetätigung, Gangwahl, Blinkerbetätigung, aktuelle Infotainmenteinstellungen, Klimaeinstellungen, Navigationseinstellungen, Telefonaktivitäten und dergleichen zur Verfügung.The pause recommendation module 20 receives information about at least one driver activity of the vehicle driver via the input device 22 and links these driver activities to a driver activity pattern. Information about a steering movement, brake pedal actuation, accelerator pedal operation, clutch actuation, gear selection, turn signal actuation, current infotainment settings, climate settings, navigation settings, telephone activities and the like are available via the input device 22, for example.

Diese vom Fahrzeugsführer ausgelösten Aktivitäten werden entsprechend ihrer unterschiedlichen Ausprägung zu einem Aktivitätsindex verknüpft. Hierzu erfolgt eine Klassifikation der Regel- und Bedientätigkeiten des Fahrzeugführers hinsichtlich der Regelgüte und des geschätzten Aktivierungsniveaus unter Berücksichtigung von Teilaktivitäten der theoretisch möglichen Aktivitäten. Dieser Aktivitätsindex kann beispielsweise den Wert -2 bis +2 annehmen. Der Wert -2 steht beispielsweise für hohe Regel- und Bedienaktivität bei gleichzeitig geringer Regelgüte und Fahrleistung. Der Aktivitätsindex +2 steht beispielsweise für hohe Regel- und Bedienaktivität bei gleichzeitig hoher Regelgüte und Fahrleistung. Der Aktivitätsindex -1 steht beispielsweise für geringe Regel- und Bedienaktivität bei geringer Regelgüte und Fahrleistung und der Aktivitätsindex +1 steht beispielsweise für geringere Regel- und Bedienaktivität bei gleichzeitig hoher Regelgüte und Fahrleistung.These activities triggered by the driver are linked to an activity index according to their different characteristics. For this purpose, a classification of the control and operating activities of the vehicle driver with regard to the control quality and the estimated activation level taking into account partial activities of the theoretically possible activities. For example, this activity index may be -2 to +2. The value -2 stands, for example, for high control and operating activity with simultaneously low control quality and driving performance. The activity index +2 stands, for example, for high control and operating activity with simultaneously high control quality and driving performance. The activity index -1 stands, for example, for low control and operating activity with low control quality and mileage and the activity index +1 stands, for example, for lower control and operating activity with high control quality and mileage.

Über den Regelkreis 24 wird dieser Aktivitätsindex mit der von der Auswerteeinrichtung 14 gelieferten Pausenempfehlung adaptiert.About the control circuit 24, this activity index is adapted with the pause recommendation provided by the evaluation device 14.

Diese aktivitätsmoderierte Pausenempfehlung wird dem Pausenempfehlungsadaptiermodul 26 mitgeteilt, das die Ausgabeeinrichtung 28 mit einer entsprechenden Information versorgt. Die Ausgabe der Pausenempfehlung kann hierbei visuell und/oder akustisch erfolgen.This activity-moderated pause recommendation is communicated to the pause recommendation adaptation module 26, which supplies the output device 28 with corresponding information. The output of the break recommendation can be done visually and / or acoustically.

Es wird deutlich, dass über die Eingabeeinrichtung 22 zu der über die Auswerteeinrichtung 14 errechneten Pausenempfehlung eine den unterschiedlichen Kraftfahrzeugfahrern entsprechend ihres konkreten Fahreraktivitätmusters angepasste optimale Pausenempfehlung gegeben werden kann. Diese kann entsprechend dem tatsächlichen Fahraktivitätsmuster eine Verschiebung der Pausenempfehlung auf einen früheren oder einen späteren Zeitpunkt beinhalten. Die Dauer einer maximal möglichen Verschiebung sowohl hinsichtlich einer Verkürzung als auch einer Verlängerung der Fahrzeit bis zur nächsten Pausenempfehlung kann begrenzt sein und beispielsweise +/- 1 Stunde zu der von der Auswerteeinrichtung 14 vorgegebenen Pausenempfehlung variieren. Durch den regelbasierten Algorithmus zur Berücksichtigung der Fahreraktivität kann die Funktion eines erwarteten Verlaufs in die Zukunft implementiert werden. Durch die aktivitätsadaptierte Pausenempfehlung ergibt sich zwar noch eine Schwankungsbreite bei maximal +/- 1 Stunde, es ist jedoch ein verlässlicher Trend zur Wiedergabe einer optimalen Pausenempfehlung möglich.It becomes clear that via the input device 22 to the pause recommendation calculated via the evaluation device 14, an optimal pause recommendation adapted to the different motor vehicle drivers according to their specific driver activity pattern can be given. This may include a shift of the pause recommendation to an earlier or a later time according to the actual driving activity pattern. The duration of a maximum possible displacement, both with regard to a reduction and an extension of the travel time to the next pause recommendation, may be limited and, for example, vary +/- 1 hour to the pause recommendation predetermined by the evaluation device 14. The rule-based algorithm for taking driver activity into account can be used to implement the function of an expected course into the future. Although the activity-adapted break recommendation still results in a fluctuation range of a maximum of +/- 1 hour, a reliable trend towards the reproduction of an optimal break recommendation is possible.

Die Adaption der über die Auswerteeinheit gelieferten Pausenempfehlung durch den Aktivitätsindex kann in festgelegten oder festlegbaren Zeitspannen, beispielsweise jede Minute, erfolgen. So wird entsprechend einer sich ändernden Fahreraktivität eine Anpassung der Pausenempfehlung fortlaufend möglich. Eine Aktualisierung der Pausenempfehlung ist somit möglich.The adaptation of the break recommendation provided by the evaluation unit to the activity index can be carried out at fixed or determinable time intervals, for example every minute. Thus, according to a changing driver activity, an adaptation of the pause recommendation is continuously possible. An update of the break recommendation is thus possible.

Figur 2 zeigt in einer Kennlinie 30 die durch den Aktivitätsindex adaptierte Pausenempfehlung. Über der Fahrzeit tF ist hier die berechnete Zeit tP bis zur Pausenempfehlung aufgetragen. Es wird deutlich, dass der von der Auswerteeinrichtung 14 dem durch den errechneten Vigilanzindex bestimmte mittlere Abstand zur Pausenempfehlung durch den in Zeitintervallen überlagerten Aktivitätsindex beeinflusst wird. Je nach Aktivitätsindex zu dem jeweiligen Zeitpunkt 1...n n der Fahrzeit tF verkürzt oder verlängert sich die Zeit bis zur Pausenempfehlung. Das heißt, der durch die Auswerteeinheit errechnete Kurvenverlauf für die Pausenempfehlung wird entweder über der Fahrzeit angehoben oder abgesenkt. Hierdurch ergibt sich eine adaptierte Pausenempfehlung entweder für eine frühere Pausenwarnung PWf, eine spätere Pausenwarnung PWs oder die mittlere Pausenwarnung PWm bleibt erhalten. FIG. 2 shows in a characteristic curve 30 the break index adapted by the activity index. Over the travel time t F , the calculated time t P is plotted here until the break recommendation. It becomes clear that the average distance to the recommended break determined by the calculated vigilance index by the evaluation device 14 is influenced by the activity index superimposed on time intervals. Depending on the activity index at the respective time point 1 ... nn of the travel time t F , the time until the break recommendation is shortened or extended. That is, calculated by the evaluation unit waveform for the break recommendation is either raised or lowered over the travel time. This results in an adapted pause recommendation either for an earlier pause warning PW f , a later pause warning PW s or the mean pause warning PW m is retained.

Es wird deutlich, dass mit fortschreitender Fahrzeit tF der Abstand der Kennlinie 30 zu den Pausenwarnzeitpunkten PW geringer wird. Der Verlauf der Kennlinie 30 entspricht ursprünglich dem durch die Auswerteeinrichtung 14 ermittelten Vigilanzindex. Die Abschnitte 32 der Kennlinie 30 verdeutlichen den Verlauf entsprechend dem Vigilanzindex. Zu den Zeitpunkten 1...n erfolgt jeweils eine Adaption der Kennlinie 30 in den Abschnitten 34 entsprechend dem Aktivitätsindex. Die Kennlinie 30 wird angehoben oder abgesenkt, so dass sich der Abstand zur Pausenempfehlung ändert. In dem Moment, wo die Kennlinie 30 die Pausenwarnung PW schneidet, ist der Zeitpunkt der Fahrzeit tF erreicht, zu dem die Pause tatsächlich eingelegt werden sollte.It is clear that as the travel time t F progresses, the distance between the characteristic curve 30 and the pause warning times PW becomes smaller. The course of the characteristic curve 30 initially corresponds to the vigilance index determined by the evaluation device 14. The sections 32 of the characteristic curve 30 illustrate the course according to the vigilance index. At the times 1... N, an adaptation of the characteristic curve 30 takes place in the sections 34 corresponding to the activity index. The characteristic 30 is raised or lowered, so that the distance to the pause recommendation changes. At the moment when the characteristic curve 30 intersects the pause warning PW, the time of the travel time t F is reached at which the pause should actually be engaged.

Figur 3 zeigt in einer schematischen Draufsicht ein Kraftfahrzeug 36. Das Kraftfahrzeug 36 umfasst das Kraftfahrzeug-Assistenzsystem 10, welches beispielsweise in ein Steuergerät 38 integriert ist. FIG. 3 shows in a schematic plan view of a motor vehicle 36. The motor vehicle 36 includes the motor vehicle assistance system 10, which is integrated, for example, in a control unit 38.

Dargestellt ist ferner die Ausgabeeinrichtung 28, die beispielsweise im Bereich eines Armaturenbrettes 40 angeordnet ist. Die Ausgabe kann akustisch und/oder optisch und/oder haptisch erfolgen.Shown is also the output device 28, which is arranged for example in the area of a dashboard 40. The output can be acoustically and / or optically and / or haptically.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Kraftfahrzeug-AssistenzsystemMotor vehicle assistance system
1212
Eingabeeinrichtunginput device
1414
Auswerteeinrichtungevaluation
1616
Speichermittelstorage means
1818
Regelkreisloop
2020
PausenempfehlungsmodulPause recommendation module
2222
Eingabeeinrichtunginput device
2424
Regelkreisloop
2626
PausenempfehlungsadaptionsmodulPause recommendation adaptation module
2828
Ausgabeeinrichtungoutput device
3030
Kennliniecurve
3232
Abschnittsection
3434
Abschnittsection
3636
Kraftfahrzeugmotor vehicle
3838
Steuergerätcontrol unit
4040
Armaturenbrettdashboard

Claims (10)

Kraftfahrzeug-Assistenzsystem (10) mit einer Ausgabeeinrichtung (28) zur Ausgabe einer Pausenempfehlung an einen Fahrzeugführer, eine Auswerteeinrichtung (14) zur Berechnung der Pausenempfehlung sowie einer ersten Eingabeeinrichtung (12) zur Eingabe wenigstens einer Fahraufgabe an die Auswerteeinrichtung (14), dadurch gekennzeichnet, dass das Kraftfahrzeug-Assistenzsystem (10) eine zweite Eingabeeinrichtung (22) zur Eingabe mindestens einer Fahreraktivität umfasst.Motor vehicle assistance system (10) with an output device (28) for outputting a pause recommendation to a driver, an evaluation device (14) for calculating the pause recommendation and a first input device (12) for entering at least one driving task to the evaluation device (14), characterized in that the motor vehicle assistance system (10) comprises a second input device (22) for inputting at least one driver activity. Verfahren zum Erzeugen, Steuern und Auslösen einer Pausenempfehlung an den Fahrer eines Fahrzeuges (36) mit folgenden Schritten: - Ermitteln wenigstens einer Fahraufgabe des Fahrers des Fahrzeuges (36), - Errechnen einer Pausenempfehlung mithilfe eines vorgegebenen Vigilanzindex, - Ermitteln wenigstens einer Fahraktivität des Fahrers des Fahrzeuges (36), - Korrigieren der Pausenempfehlung aufgrund der wenigstens einen ermittelten Fahreraktivität, - Ausgabe der Pausenempfehlung an den Fahrer des Fahrzeuges (36). A method for generating, controlling and triggering a break recommendation to the driver of a vehicle (36) with the following steps: Determining at least one driving task of the driver of the vehicle (36), - calculating a break recommendation using a given vigilance index, Determining at least one driving activity of the driver of the vehicle (36), Correcting the break recommendation based on the at least one determined driver activity, - Output of the break recommendation to the driver of the vehicle (36). Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass als Fahraufgabe Geschwindigkeit, Straßentyp, Kurvigkeit, Verkehrsdichte, Witterung und/oder Sichtbedingungen berücksichtigt werden.A method according to claim 2, characterized in that as a driving task speed, road type, curvature, traffic density, weather and / or visibility conditions are taken into account. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass bei den Fahraufgaben Informationen über den Automatisierungsgrad des Fahrzeuges (36) berücksichtigt werden.Method according to one of the preceding claims, characterized in that in the driving tasks information about the degree of automation of the vehicle (36) are taken into account. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass bei den Fahraufgaben Informationen zum Fahrkontext berücksichtigt werden.Method according to one of the preceding claims, characterized in that information about the driving context is taken into account in the driving tasks. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass aus der wenigstens einen Fahraufgabe eine durch den Vigilanzindex bestimmte Kennlinie (30) ermittelt wird, die einen Zeitpunkt für eine Pausenempfehlung vorschlägt.Method according to one of the preceding claims, characterized in that from the at least one driving task a determined by the vigilance index characteristic curve (30) is determined, which proposes a time for a break recommendation. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass aus der wenigstens einen ermittelten Fahreraktivität ein Aktivitätsindex ermittelt wird, der die durch den Vigilanzindex bestimmte Kennlinie (30) anhebt oder absenkt.Method according to one of the preceding claims, characterized in that from the at least one ascertained driver activity, an activity index is determined which raises or lowers the characteristic curve (30) determined by the vigilance index. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Aktivitätsindex in festlegbaren Zeitspannen aktualisiert wird.Method according to one of the preceding claims, characterized in that the activity index is updated in definable time periods. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass bei der Bestimmung des Aktivitätsindex eine Regelaktivität und Bedienaktivität sowie eine Regelgüte und Fahrleistung des Kraftfahrzeugfahrers berücksichtigt wird.Method according to one of the preceding claims, characterized in that in the determination of the activity index, a control activity and operating activity and a control quality and driving performance of the motor vehicle driver is taken into account. Kraftfahrzeug (36), gekennzeichnet durch ein Kraftfahrzeug-Assistenzsystem (10) mit den in Anspruch 1 genannten Merkmalen.Motor vehicle (36), characterized by a motor vehicle assistance system (10) with the features mentioned in claim 1.
EP12193135.6A 2011-12-17 2012-11-19 Motor vehicle assistance system and method for generating, controlling and triggering break recommendations and motor vehicle Active EP2605227B1 (en)

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