DE102020115818A1 - Method and system for determining and reproducing a performance value of a vehicle occupant, in particular a driver of a vehicle - Google Patents

Abstract

The invention relates to a method for, in particular continuously, determining and displaying a performance value (LW) of a driver (100) of a vehicle (10), the method comprising the following steps: a) determining the physical condition (KOE) and the mental condition and the emotional state (KB) of the driver (100);b) acquiring sensor data (SD) of the vehicle (10) relating at least to the outside temperature, the brightness and the degree of wetting of a vehicle surface with liquid;c) acquiring location data , in particular GPS data, and preferably navigation data (ROAD) of the vehicle (10); d) calculating the performance value (LW) of the driver (100) from the data (KOE, KB) determined and recorded in steps a) to c). , SD, ROAD); ande) displaying the power value (LW) calculated in step d).

Description

The invention relates to a method for, in particular continuously, determining and reproducing a performance value of a vehicle occupant, in particular a driver of a vehicle, according to claim 1. Furthermore, the invention relates to a system for continuously determining and reproducing a performance value of a vehicle occupant, in particular a driver of a vehicle According to claim 10. The invention also relates to a computer-readable storage medium according to claim 13.

Accident statistics show that a significant proportion of traffic accidents can be traced back to the inattentiveness of a motor vehicle driver. This can be traced back to a state of overtiredness, for example. Further factors relate, for example, to the mental state of a motor vehicle driver.

From the prior art it is only known to date to check the driver with regard to any drowsiness. Furthermore, it is known to regularly remind a driver of driving breaks to be taken. However, these measures are not sufficient to fully determine the performance value of a driver, which includes other variables in addition to a fatigue value, and to initiate appropriate countermeasures.

Starting from the aforementioned prior art, it is therefore the object of the present invention to specify a method for continuously determining and reproducing a performance value of a vehicle occupant, in particular a driver of a vehicle. Such a method should make it possible to monitor the driver of a vehicle at any time in real time with regard to his performance.

A further object of the present invention is to further develop a corresponding system that is suitable for carrying out such a method according to the invention for the continuous determination and reproduction of a performance value of a vehicle occupant, in particular a driver of a vehicle.

This object is achieved with regard to the method according to claim 1, with regard to the system according to claim 10 and with regard to a computer-readable storage medium according to claim 13.

1. a) Bestimmen des körperlichen Zustands und des emotionalen Zustands und des mentalen Zustands des mindestens einen Fahrzeuginsassen, insbesondere des Fahrers;
2. b) Erfassen von Sensor-Daten des Fahrzeuges, betreffend zumindest die Außentemperatur, die Lichtverhältnisse und den Benetzungsgrades einer Fahrzeugoberfläche mit Flüssigkeit (Niederschlagsdetektion);
3. c) Erfassen von Standort-Daten, insbesondere von GPS-Daten, und vorzugsweise Navigationsdaten des Fahrzeuges;
4. d) Berechnen des Leistungswertes des Fahrzeuginsassen, insbesondere des Fahrers aus den in den Schritten a) bis c) bestimmten und erfassten Daten; und
5. e) Wiedergabe des in Schritt d) berechneten Leistungswertes.

In particular, the object is achieved by a method for, in particular continuously, determining and reproducing a performance value of at least one vehicle occupant, in particular a driver of a vehicle, which comprises the following steps:

1. a) determining the physical state and the emotional state and the mental state of the at least one vehicle occupant, in particular the driver;
2. b) Acquisition of sensor data of the vehicle, relating at least to the outside temperature, the lighting conditions and the degree of wetting of a vehicle surface with liquid (precipitation detection);
3. c) Acquisition of location data, in particular GPS data, and preferably navigation data of the vehicle;
4. d) calculating the power value of the vehicle occupant, in particular the driver, from the data determined and recorded in steps a) to c); and
5. e) Reproduction of the power value calculated in step d).

The idea according to the invention is based on the fact that when calculating the power value of a vehicle occupant, in particular a driver, several mutually independent data are recorded. These data relate, on the one hand, to the person-specific data of the vehicle occupant, in particular a driver, and, on the other hand, to the position data of the vehicle and corresponding environmental factors that prevail when the vehicle is used.

The method according to the invention thus goes beyond the standard detection of tiredness of the vehicle occupant, in particular the driver, of a vehicle. It should also be pointed out that the calculated performance value is continuously determined and also displayed continuously. Due to the method according to the invention, the vehicle occupant of a vehicle is continuously, i. H. during the entire journey, informed about its current performance value.

The data and / or values determined in step a) can also be referred to as person-specific or driver-specific data.

The data and / or values recorded in step b) can also be referred to as environmental factors.

The data and / or values recorded and / or determined in step c) can also be referred to as position data.

In determining the physical, emotional and mental state of the Vehicle occupants in step a) are preferably entered by the driver with regard to the detection of sleep times and / or sleep disorders and / or rest phases and / or active phases. In other words, the vehicle occupant, in particular the driver, reproduces information about person-specific sleep times and / or sleep disorders and / or rest phases and / or active phases.

An input is preferably made in a system of the vehicle. In particular, the input is made into the vehicle's on-board computer. The entry is made, for example, before the start of the journey. It is possible that the method according to the invention is based on the fact that, before starting the engine of the vehicle, the driver must first answer questions regarding sleep times and / or sleep disorders and / or rest phases and / or active phases.

In one embodiment it is possible for this data to be entered, for example, with the aid of a mobile terminal device, for example with the aid of a smartphone. In this regard, it is possible for an app to be installed on the mobile terminal device, in particular on the smartphone, this app recording the data entered by the vehicle occupant and forwarding it to a computing unit, in particular to the vehicle's on-board computer.

Alternatively, it is possible that the input is made with the aid of an information, entertainment or infotainment system of the vehicle. For example, it is possible that the driver's input takes place via a touchscreen.

Person-specific data with regard to sleep times and / or sleep disorders and / or resting phases and / or active phases provide information about a possible fatigue value. Furthermore, this initially entered value can be used to calculate a future drowsiness value, i. H. a predictive value.

By entering person-specific information such as sleep times and / or sleep disorders and / or rest phases and / or active phases, the future performance value of a driver can be influenced accordingly and thus be included in the calculation of the performance value. Information regarding sleep times and / or sleep disorders are used in particular to detect fatigue. This information is used to determine the physical condition as well as the emotional and mental state.

In step a), in particular to determine the physical, emotional and mental state of the driver, vital data of the driver can also be determined or determined. Vital data are particularly suitable for determining the emotional and mental state. It is also possible for such vital data to be entered by the driver.

In this regard, too, the input can be made in connection with a touchscreen and / or a mobile terminal.

Such vital data can relate to general health data. This concerns, for example, the age, the BMI index, the stamina and / or data regarding the recording of any previous illnesses. The vital data of a younger driver, i. H. of a driver between 20 and 30 years of age, for example, will be better than the vital data of a 70 to 80-year-old driver. The stress threshold of a driver of a vehicle who has correspondingly better vital data is thus higher than that of a driver with poorer vital data.

Furthermore, it is possible that in step a) to determine the physical, emotional and mental state of the driver, the blinking frequency and / or the pulse and / or the breathing rate of the driver are recorded. This detection of the blink frequency and / or the pulse and / or the breathing rate is preferably carried out continuously while the vehicle is being driven.

By recording the frequency of blinking, a state of fatigue and microsleep can be recorded. By recording the pulse and / or the breathing rate, similar conclusions can be drawn about the current physical condition of the driver.

The frequency of blinking can be done for example by means of a corresponding sensor. The measurement of the pulse and / or the respiratory rate is possible, for example, using wearables. Wearables are portable computer systems that can detect body functions such as the pulse and / or the respiratory rate and / or the blood pressure of the user. For example, it is possible to record such body or vital functions with the help of fitness bands or fitness trackers, smartwatches or sensor glasses.

Furthermore, it is possible to record the physical condition of the driver by detecting the sitting posture of the driver. This is possible, for example, by monitoring or monitoring the seat occupancy sensors of the driver's seat.

To determine the mental state and / or the emotional state of a driver, an input from the driver can be made in step a) Answer a defined catalog of questions. It is possible here for the catalog of questions to contain such questions that infer the current mental and / or emotional state of the driver.

For example, it can be queried what the current emotional state of the driver is. These can be emotions such as anger, hate, sadness, joy, fear, enthusiasm, boredom, etc.

Furthermore, it is possible to determine a driver's cognitive load and the emotional state of the driver's reactions while driving. For example, angry interaction with other road users or with another vehicle occupant indicates a corresponding negative emotional state.

Singing along to a song, on the other hand, indicates a positive emotional state of the driver.

The recording of a phone call indicates a certain degree of mental distraction on the part of the driver.

In step a), a driver-specific value, consisting of the physical state, the mental state and the emotional state of the driver, is determined overall.

The driver-specific value can be determined from a drowsiness value and / or vigilance value and / or arousal value and / or valence value and / or value of the mental strain and / or a value of the physical condition. In other words, the driver-specific value can be referred to as the value of the general well-being of the driver.

In step b) sensor data of the vehicle are recorded, relating at least to the outside temperature, the lighting conditions and the degree of wetting of a vehicle surface with liquid.

A low outside temperature, combined with possibly measured humidity, can indicate slippery roads, for example. In such road situations, a driver of a vehicle is more tense than in dry road conditions.

By detecting the light conditions or the brightness, it can initially be concluded whether the vehicle is driving during the day or at night. It is well known that the driver of a vehicle is correspondingly more tense at night.

Furthermore, based on the detected light or brightness value, it can be concluded whether a vehicle is in a tunnel, for example. Such driving situations also have a corresponding effect on the driver's performance. Vehicle drivers often find journeys in a tunnel very stressful, so that there is a corresponding effect on the driver's performance.

The detection of the degree of use of a vehicle surface with liquid is used to determine whether there is any precipitation. Driving in the rain is perceived as exhausting by a vehicle driver. The degree of exertion increases with increasing rainfall and, for example, with a corresponding increase in the windshield wiper cycle.

It is also possible in step b) to also record sensor data from the tires relating to drive slip controls or traction controls. Such traction control systems or traction controls detect the spinning of wheels, this being determined in particular on smooth or unpaved ground. Such environmental factors or conditions require the driver to pay more attention, so that the performance value of the driver will decrease after a corresponding journey on such a surface or under such conditions.

The sensor data of the vehicle acquired in step b) are preferably based on such sensor data that are already used in other systems of the vehicle. Accordingly, there is preferably no need to acquire any additional sensor data in order to carry out the method according to the invention. The formation of additional sensors is therefore not necessary in any case.

In step c) the location data, in particular the GPS data, of the vehicle are recorded. In other words, the position of the vehicle is recorded in real time. In particular, the vehicle's navigation data are also recorded. This is the data that is determined on the basis of a destination specified before the start of the journey. The navigation data include, on the one hand, the destination and, on the other hand, the distance to be covered to reach the destination.

Based on the acquisition of GPS data or location data, conclusions can be drawn in real time about the current section of the route to be covered. It is therefore possible to determine whether the vehicle is currently in city traffic, on a motorway or on a country road, for example. Furthermore, the course of the road can be traced. It is possible, determine whether the vehicle is negotiating a winding road or a mountain road or a straight stretch of road. Depending on the course of the route, it may be necessary to assume that the vehicle driver will be attentive. If a monotonous straight route is covered, it may be assumed that the driver is less alert. This influences the corresponding performance value of the driver.

Furthermore, the navigation data can be used to determine the travel time already covered. The performance value of the driver will decrease accordingly with increasing journey time. The knowledge of a driving time still to come also has an effect on the condition of the vehicle occupant, in particular the driver. This value also has a corresponding effect on the performance value of the vehicle occupant, in particular the driver.

In one embodiment of the invention, it is possible that additional traffic information is recorded when performing step c). In particular in the case of recorded congestion or situations with slow traffic, a corresponding reduction in the performance value of the vehicle occupant, in particular the driver, is possible due to the stress caused thereby.

The method according to the invention can comprise a step f), in which vehicle comfort measures and / or vehicle interior conditions acting on the driver are recorded.

Step f) is carried out before step d) so that the data recorded in step f) can be taken into account when calculating the performance value of the driver in step d).

Vehicle comfort measures can for example be activated lighting arrangements and / or activated massage functions and / or activated entertainment systems. The entertainment systems can be, for example, activating music programs.

Vehicle interior conditions are, for example, the temperatures measured in the vehicle interior and / or the detection of other vehicle occupants. The drowsiness of a driver is correspondingly reduced if there are other passengers in the vehicle. Because of the interaction with other vehicle occupants, for example, monotonous road conditions have a far less impact on the driver's performance than when the vehicle driver drives alone.

The calculation of the driver's performance value carried out in step d) takes place on the basis of the data determined and recorded in steps a) to c). The calculation is preferably carried out with the aid of a computing unit in the vehicle, preferably with the aid of an on-board computer in the vehicle.

Steps a) to c) are carried out before step d). Steps a) to c) can be carried out simultaneously. Steps a) to c) can be carried out in any order, but before step d) is carried out.

The calculated power value can be reproduced in step e) graphically and / or acoustically. In other words, the driver's performance value can be reproduced graphically and / or acoustically.

According to the invention, playback takes place continuously. It is possible that the performance value is only reproduced when the performance value changes. In other words, a graphic and / or acoustic signal can occur when the driver's power value changes. This also corresponds to a continuous reproduction, since if the power value is not displayed, information is available that the power value has not changed.

Furthermore, it is possible for the data recorded and determined in steps a) to c) as well as in step f) to be reproduced continuously. In this case, too, it is possible for the determined or recorded data to be reproduced only when there is a change, in particular graphically and / or acoustically.

It is possible for the method to include a display of the performance value of the driver or the measures that preserve the performance value of the driver. This display preferably takes place as a function of the power value calculated in step e). Measures that increase or maintain the performance of the driver can be, for example, the activation of massage functions, the setting of the vehicle interior temperature or the selection of a specific piece of music. It is possible that the driver can select an appropriate measure from the measures shown.

The data acquired and determined in steps a) and b) and c), in particular the data acquired and determined in steps a) and b) and c) and f), are preferably assigned different weightings. When calculating the power value, an activated comfort and / or assistance function can be included, with an activated or used comfort or assistance function. Assistance function causes an increased performance value of the driver.

A freeway journey of several hours, for example, leads to a reduced performance value due to a lack of body movement. If a massage function was activated and used once or several times during this motorway trip, this can lead to a more positive assessment of the driver's performance and thus to an increased performance value of the driver. In other words, the activation of vehicle comfort measures or vehicle assistance functions with otherwise unchanged recorded and / or specific data will enable an increase in the performance value or at least a maintenance of the performance value of the driver.

• - mindestens eine Vorrichtung zum Bestimmen des körperlichen Zustands und des emotionalen Zustands und des mentalen Zustands des Fahrzeuginsassen, insbesondere des Fahrers,
• - mindestens einen Außentemperatur-Sensor, einen Lichtsensor und einen Benetzungsgrad-Sensor einer Fahrzeugoberfläche mit Flüssigkeit,
• - mindestens einen Standorterfassungs-Sensor, insbesondere einen GPS-Sensor,
• - mindestens ein Navigationssystem,
• - mindestens eine Recheneinheit zum Berechnen des Leistungswertes des Fahrzeuginsassen, insbesondere des Fahrers, und
• - mindestens eine Wiedergabe-Vorrichtung zur Wiedergabe des berechneten Leistungswertes.

Another aspect of the invention relates to a system for carrying out a method according to the invention. This system includes:

• - At least one device for determining the physical state and the emotional state and the mental state of the vehicle occupant, in particular the driver,
• - At least one outside temperature sensor, one light sensor and one wetting level sensor of a vehicle surface with liquid,
• - at least one location detection sensor, in particular a GPS sensor,
• - at least one navigation system,
• - At least one computing unit for calculating the power value of the vehicle occupant, in particular the driver, and
• - At least one display device for displaying the calculated power value.

The device for determining the physical state and the emotional state and the mental state of the vehicle occupant, in particular the driver, can comprise an input unit and / or a blinking detection unit and / or a heart rate monitor and / or a blood pressure monitor.

The wetting degree sensor of a vehicle surface with liquid can be a precipitation sensor or rain sensor.

The playback device can be a screen and / or a loudspeaker.

The computing unit for calculating the power value of the vehicle occupant, in particular the driver, is preferably an on-board computer of the vehicle.

The system can also include indoor sensors. The interior sensors can, for example, determine the interior temperature and / or the humidity in the interior and / or a CO ₂ content in the vehicle interior.

It is also possible for the system to include a sensor for detecting further vehicle occupants.

In connection with the system according to the invention for continuously determining and reproducing a performance value of a vehicle occupant, in particular a driver of a vehicle, the same advantages result as those already described in connection with the method according to the invention.

Another aspect of the invention relates to a computer-readable storage medium which contains instructions which cause at least one processing unit, in particular an on-board computer of a vehicle, to implement a method as described above.

The performance value of a vehicle occupant, in particular a driver, can be stored in a storage medium in the vehicle. The power value of one or more journeys can also be output to the vehicle occupant, in particular the driver, after the journey. This enables, for example, the performance values of several journeys to be compared with one another.

The performance value can be available to other systems on the vehicle's electrical system or outside (cloud / backend) (mobile devices) as an information source. The performance value is not to be understood as a closed system, but can also be made available to other ecosystems. The vehicle occupant, in particular the driver, can thus receive credits / points / benefits for the life display with regard to his behavior and the positive compensation measures received.

Further advantageous embodiments emerge from the subclaims.

In the following, the invention is also described with regard to further features and advantages on the basis of exemplary embodiments, which are explained in more detail with reference to figures.

• 1 eine schematische Darstellung einer Draufsicht eines Fahrzeugs; und
• 2 ein Ablaufschema eines erfindungsgemäßen Verfahrens zur kontinuierlichen Ermittlung und Wiedergabe eines Leistungswertes eines Fahrzeuginsassen, insbesondere eines Fahrers eines Fahrzeugs.

Here shows:

• 1 a schematic representation of a plan view of a vehicle; and
• 2 a flow chart of a method according to the invention for the continuous determination and reproduction of a performance value of a vehicle occupant, in particular a driver of a vehicle.

In the following description, the same reference numbers are used for parts that are the same and have the same effect.

1 shows a schematic representation of a top view of a vehicle 10 , a system according to the invention for carrying out a method for the continuous determination and reproduction of a performance value of a driver 100 having. The associated calculation of the performance value LW of the driver 100 is in 2 shown. In the example shown, only the power value is used LW of the driver 100 definitely. The system according to the invention is, however, equally suitable for calculating the power value LW of a (further) vehicle occupant.

In the vehicle 10 is a device for determining the physical condition KOE and the emotional and mental state KB of the driver 100 educated.

In the example given, it is used to determine the physical, mental and emotional state KOE a blink detection unit 20th , a heart rate monitor 25th as well as an input unit 30th educated. The heart rate monitor 25th can be designed as a component of a fitness bracelet.

With the help of the input unit 30th can the driver 100 Enter data regarding his sleep times and / or sleep disorders and / or rest phases and / or active phases.

With the help of the blinking detection unit 20th , the heart rate monitor 25th as well as the input unit 30th can the physical condition KOE as well as data regarding the mental and emotional state KB to be determined.

The vehicle 10 furthermore has an outside temperature sensor 35 , a light sensor 40 as well as a rain sensor 45 on. The rain sensor 45 can also be referred to as a moisture level sensor of a vehicle surface with liquid. The ones from the sensors 35 , 40 and 45 collected data SD thus affect the environmental factors in which the vehicle is 10 is currently located.

With the help of the light sensor 40 On the one hand, it can be determined whether a day or night journey is taking place. It can also be determined whether the vehicle is 10 for example located in a tunnel.

The system further comprises at least one location detection unit 50 . This is preferably a GPS sensor. The vehicle 10 also has a navigation system 55 on. Together with those from the location detection unit 50 recorded data will be the navigation data 55 as data ROAD recorded.

In the arithmetic unit 80 are the specific data regarding the physical condition KOE and the emotional and mental state of the driver KB , the recorded data of the outside temperature sensor, the light sensor 40 , the rain sensor 45 , namely the sensor data SD and the data ROAD receive.

The data recorded and determined in steps a), b) and c) ( KOE , KB , SD , ROAD ) are assigned different weightings. To this end, the arithmetic unit 80 preferably a database with weightings stored therein.

In step d), the arithmetic unit 80 the performance value LW of the driver 100 calculated. The calculated performance value LW is shown on the screen in the example shown 60 reproduced. Furthermore it is possible that on the screen 60 the data determined and recorded according to the invention, namely KOE , KB , SD and ROAD can also be displayed individually or combined as data groups.

Depending on the power value calculated in step d) LW can represent 65 of the performance value LW measures taken to increase or maintain the driver. Representing 65 can be in the form of a list. For example, this list can represent vehicle comfort measures.

For example, it can be a vehicle comfort measure of this type KM to activate a massage device 70 Act. The driver 100 can from the representation 65 a corresponding vehicle comfort measure, in this case activating a massage device 70 choose. The massage device 70 is then activated. It is possible that the data relating to the activated massage device 70 to the computing unit 80 be sent. Activating a massage device 70 has a positive effect on the power value to be calculated LW out.

The vehicle 10 can also have a sensor 95 exhibit. This sensor 95 can be used in the vehicle interior 90 the prevailing conditions, such as the interior temperature, the oxygen content, etc. Also the data of this sensor 95 can be sent to the processing unit 80 to calculate the performance value LW be sent.

At this point it should be pointed out that all of the parts described above, seen on their own and in any combination, in particular the details shown in the drawings, are claimed to be essential to the invention. Changes hereof are familiar to the person skilled in the art.

List of reference symbols

10

vehicle

20th

Blink detection unit

25th

Heart rate monitor

30th

Input unit

35

Outside temperature sensor

40

Light sensor

45

rain sensor

50

Location detection unit

55

navigation system

60

screen

65

depiction

70

Massage device

80

Arithmetic unit

90

Vehicle interior

95

Vehicle interior sensor

100

vehicle

KB

emotional and mental state

KM

Vehicle comfort measure

LW

Performance value

KOE

physical state

ROAD

Location and navigation data

SD

Sensor data

Claims (13)

A method for, in particular continuously, determining and reproducing a power value (LW) of a vehicle occupant, in particular a driver (100) of a vehicle (10), the method comprising the following steps: a) determining the mental state and the emotional state (KB) and the physical state (KOE) of the vehicle occupant, in particular the driver (100); b) Acquisition of sensor data (SD) of the vehicle (10), relating at least to the outside temperature, the brightness and the degree of wetting of a vehicle surface with liquid; c) Acquisition of location data, in particular GPS data, and preferably navigation data (ROAD) of the vehicle (10); d) calculating the power value (LW) of the vehicle occupant, in particular the driver (100), from the data (KOE, KB, SD, ROAD) determined and recorded in steps a) to c); and e) Reproduction of the power value (LW) calculated in step d). Procedure according to Claim 1 , characterized in that in step a) to determine the physical (KOE) and / or mental and / or the emotional state (KB) of the vehicle occupant, in particular the driver (100), an input from the driver to record sleep times and / or Sleep disturbances and / or rest phases and / or active phases takes place. Procedure according to Claim 1 or 2 , characterized in that in step a) to determine the physical (KOE) and / or the mental and / or the emotional state (KB) of the vehicle occupant, in particular the driver (100), a detection of the blink frequency and / or the pulse and / or the respiratory rate of the driver takes place. Method according to one of the Claims 1 until 3 , characterized in that in step a) to determine the mental state and / or the emotional state (KB) of the vehicle occupant, in particular the driver (100), an input from the vehicle occupant, in particular the driver (100), to answer a defined catalog of questions he follows. Method according to one of the preceding claims, characterized in that in step c) a current location of the vehicle (10) is recorded and a destination of the vehicle (10) to be reached and preferably related traffic information are recorded. Method according to one of the preceding claims, characterized by a step f), in which vehicle comfort measures (KM) and / or vehicle interior conditions acting on the vehicle occupant, in particular the driver (100), are recorded and when the power value (LW) is calculated of the vehicle occupant, in particular the driver (100), are taken into account in step d). Method according to one of the preceding claims, characterized in that the calculated power value (LW) is reproduced in step e) graphically and / or acoustically. Method according to one of the preceding claims, characterized in that, preferably as a function of the power value (LW) calculated in step e), a display (65) of the power value of the vehicle occupant, in particular the driver, increasing the power value of the vehicle occupant, in particular the driver , maintaining vehicle comfort measures (KM) takes place. Method according to one of the preceding claims, characterized in that the data recorded and determined in steps a) and b) and c) (KOE, KB, SD, ROAD), in particular those in steps a) and b) and c) and f) different weightings are assigned to recorded and specific data (KOE, KB, SD, ROAD). System for carrying out a method according to one of the Claims 1 until 9 , comprising: - at least one device for determining the physical state (KOE) and the emotional state and the mental state (KB) of the vehicle occupant, in particular the driver (100), - at least one outside temperature sensor (35), a light sensor (40 ) and a degree of wetting sensor (45) of a vehicle surface with liquid, - at least one location detection unit (50), in particular a GPS sensor, - at least one navigation system (55), - at least one computing unit (80) for calculating the power value ( LW) of the driver (100), and - at least one display device (60) for displaying the calculated power value (LW). System according to Claim 10 , characterized in that the device for determining the physical state (KOE) and / or the emotional state and / or the mental state (KB) of the vehicle occupant, in particular the driver (100), an input unit and / or a blink of an eye Acquisition unit (20) and / which comprises a heart rate monitor (25) and / or a blood pressure monitor. System according to Claim 10 or 11th , characterized in that the playback device is a screen (60) and / or a loudspeaker. Computer-readable storage medium which contains instructions which cause at least one processing unit (80), in particular an on-board computer of a vehicle (10), to do so by a method according to one of the Claims 1 until 9 to implement.

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