DE102015200775A1 - Independent assessment of an emotional state and a cognitive burden - Google Patents

Abstract

A device, a driver assistance system, a means of locomotion and a method for the independent assessment of an emotional state and a cognitive load of a driver of a means of locomotion are proposed. The method comprises the steps: sensory acquisition of a physiological parameter of the driver, information technology-based detection of an interaction of the driver with a control element of the means of locomotion, determination of a traffic situation of the means of locomotion, and using the physiological parameter as well as the interaction and the traffic situation first assessment of the driver's emotional state and a second assessment of the driver's cognitive load using an electronically held reference. On the basis of the assessment made according to the invention, an actuator system present in the vehicle can be used to favorably or favorably influence the driver's emotional state and cognitive load.

Description

The present invention relates to a device, a driver assistance system, a means of locomotion as well as a method for the independent assessment of an emotional state and a cognitive load of a driver of a means of locomotion (hereinafter "driver"). More particularly, the present invention relates to the assistance of a driver of a vehicle in consideration of an emotional condition and a cognitive load.

• 1. Die kognitive Belastung einer Person kann auch als mentale „workload“ (englisch für „Arbeitslast“) bezeichnet werden und ist die Menge an Aufmerksamkeit oder „Rechenleistung“, die der Ausführende aufwenden muss, um die gestellte Aufgabe zufriedenstellend zu bearbeiten / zu erfüllen.
• 2. Der emotionale Zustand wird im Kontext der Aufmerksamkeit in Valenz (positive bzw. negative Stimmung) und Arousal (eng. für „Level an Angeregtheit/Aufgeregtheit“) quantifiziert. Er umfasst Gefühle wie Angst, Stress, Erschöpfung oder Aufgeregtheit.

In the context of the present invention, the terms "cognitive load" and "emotional state" are used as follows:

• 1. A person's cognitive load can also be referred to as a mental "workload" and is the amount of attention or "computing power" the performer must spend to satisfactorily fulfill the task ,
• 2. The emotional state is quantified in the context of attention in valence (positive or negative mood) and arousal (narrow for "level of arousal / excitement"). It includes feelings like anxiety, stress, fatigue or excitement.

• • Fahrerperformance
• • Fahrsicherheit
• • Fahrerkomfort

Cognitive overuse of an operator may result in the task being rendered unable to be satisfactorily performed because the task is too difficult, and thus the task performance (the level of quality of execution) decreases, while the cognitive stress can make the operator tired which in turn can lead to a decrease in task performance. Emotional states can also affect task performance. Emotional stress, anxiety or frustration reduce the available computing power of the performer. An emotional state can influence the cognitive states, for example by influencing the energy regulation. For example, driving pleasure can release concentration and lift the driver's performance. Fear or stress, on the other hand, reduces the ability to concentrate. Cognitively demanding tasks can create a sense of stress. Quantifying the cognitive state (mental overworking due to excessive task) and the emotional state (fatigue / anxiety / stress) is important to ensure that the performer of a task is not burdened at or beyond his performance limit, otherwise he is the task can not handle with sufficient performance. In the context of driving, monitoring of the cognitive and emotional state is important in order to objectively quantify the following parameters:

• • Driver performance
• • Driving safety
• • Driver comfort

Subjective quantification of cognitive load and emotional state is often performed through questionnaires that are not practical for examinations during demanding tasks such as driving a car. An objective quantification of the cognitive load and the emotional state can be performed via measurements of physical and physiological parameters. For this purpose psycho-physiological signals, e.g. the measurement of a change in language (tremor in the voice indicates anxiety) or heart rate (higher heart rate indicates anxiety / stress, but may also indicate higher mental cognitive load levels) as well as galvanic skin conductivity (this increases) Stress) are detected by known sensors.

• • eine Signalableitung des Gehirns (Elektroencephalogram): Alphabandfrequenzen steigen bei Konzentration des Probanden
• • Erfassung und Interpretation der Gesichtsausdrücke
• • Informationen der Augen wie z.B. – Lidschlag-Frequenz der Augen (niedrigere Lidschlagfrequenz deutet auf Müdigkeit hin, aber auch auf Konzentration) – Pupillendilatation – Blickrichtung
• • Informationen der Umgebung
• • Interaktion mit Interaktionselementen wie z.B. – Lenkrad – Fahrzeugpedale – Schalter – Informationssystem

Another way to objectively quantify cognitive load and emotional state

• • a signal derivative of the brain (electroencephalogram): Alphaband frequencies increase in concentration of the subject
• • Acquisition and interpretation of facial expressions
• • Information of the eyes such as - eye blink frequency (lower blink frequency indicates fatigue, but also concentration) - pupil dilatation - line of sight
• • Information about the environment
• • interaction with interaction elements such as - steering wheel - vehicle pedals - switch - information system

• – die optische Umgebung (z.B. Adaption des Innen- und Außenlichts sowie Adaption der visuellen Informationen)
• – die audio-akustische Umgebung (z.B. Musik, Umgebungsgeräusche, Gespräche, positives auditorisches Feedback)
• – die haptische Umgebung (z.B. durch eine Funktion des Massagesitzes und haptisches Feedback, z.B. durch Vibration)
• – die propriozeptive Umgebung (z.B. Sitzposition)
• – die olfaktorische Umgebung (z.B. schlechte Gerüche neutralisieren, angenehme Gerüche verbreiten)
• – Gustatorische Umgebung

So far, emotional and cognitive states are considered by systems known in the art only separately analyzed or mixed, such as the cognitive load during driving or aviation in pilots. This is related to the fact that easily measurable variables such as the heart rate does not allow a distinction between emotional stress and cognitive stress. In both cases, the heart rate increases. The same is true of the blinking rate, which decreases when a user is tired (emotional state) or concentrated (cognitive state). When it is possible to differentiate emotional states from cognitive states (and to measure them independently), knowledge about the specific emotional and cognitive state of the driver can be be specifically used to influence the information processing of the driver. In the prior art, when a combined (mixed) consideration quantifies what emotional and cognitive condition the driver is in, countermeasures can be taken before the task performance decreases (cognitively suboptimal state) or the driver becomes tired, stressed or overloaded (emotionally suboptimal condition). Thus, the above-mentioned parameters of driving performance, driver safety and driver comfort can be improved to ensure the alertness, decision-making and judgment (and other state variables) of the driver. A cognitive overload or underload is typically influenced by the task being made easier or more difficult, for example by adjusting the degree of automation in the semi-automated system. An example from the automotive sector is influencing cognitive under-demand. The car has activated lateral and longitudinal steering assistants. The driver only monitors and is cognitively under-challenged. One way to change this condition is to advise the driver after prior warning to turn off the assistant. A cognitive overload is, for example, the fact that the driver drives independently on a demanding course and calls simultaneously. This reduces the task performance (the driving task is no longer satisfactorily fulfilled or with a required reliability). In this situation, a lateral and / or longitudinal guidance assistant can be activated to make the driving task easier. Emotionally unfavorable situations (stress, fatigue and anxiety) can be influenced by changing the environment perceived by the driver's five senses. In the context of the present invention, "environment" is understood to mean the immediate surroundings of the vehicle driver, that is to say within the vehicle, which can be influenced directly by means of the vehicle. This process is done by means of Fahrzeugaktuatorik. This can be done by adapting one or more entries in the following list:

• - the optical environment (eg adaptation of the interior and exterior light and adaptation of the visual information)
• - the audio-acoustic environment (eg music, ambient noise, conversation, positive auditory feedback)
• - the haptic environment (eg by a function of the massage seat and haptic feedback, eg by vibration)
• - the proprioceptive environment (eg sitting position)
• - the olfactory environment (eg neutralize bad odors, spread pleasant odors)
• - Gustatory environment

Possible influences from the automotive sector, for example, are to reduce a driver's emotional stress. If an automobile has detected that the driver is stressed, pleasant light can automatically be switched on for the respective driver and pleasant music can be recorded to calm it down. One possible influence on emotional anxiety is that in response to an automatic detection of the fact that a driver is e.g. fearing a ride through a tunnel or a complicated construction site, driver assistance systems are perceptibly supporting the driver in this driving situation.

JP 4 307 071 A discloses a method for measuring a change in a psychological size and uses psycho-physiological measures to measure emotional stress and adjust the environment accordingly, so that users feel comfortable.

WO 2004 091371 A2 discloses the determination of a psychological state of an individual, treating the acquisition, quantification, and modification of a user's emotional and cognitive state. In particular, tired or agitated motorists are recognized and supported as needed.

US 2001 0042004 A1 discloses a system for objectively quantifying a driver's cognitive load.

The approaches known in the art mix emotional states and cognitive stresses, thereby tolerating significant blurring of the driver's actual condition. Alternatively, in the prior art, only the cognitive state of stress or the emotional state of a person is determined and influenced.

The above object is achieved by a method for independently judging an emotional state and a cognitive load of a driver of a vehicle. For this purpose, different parameters are sensory detected and an objective distinction between cognitive states and emotional states possible. In other words, the two independent dimensions "emotion" and "cognition" are considered differentiated from each other. In a first step of the method according to the invention, a physiological parameter of the driver is sensed. Before or after an interaction of the driver with an operating element of the means of transport is detected by information technology. For example, since an interaction with an operating element can generate a signal by means of which a function assigned to the operating element is started, a separate sensor for detecting the interaction is not necessary, but not excluded according to the invention. For example, such interactions of the driver could be sensory detected, which are done with the control, but do not use the control to function call. Before or after, a traffic situation of the means of locomotion is determined and, using the physiological parameter as well as the interaction and the traffic situation, a first assessment of the driver's emotional state and a second assessment of the driver's cognitive load are determined by means of an electronically made reference. The electronically held reference may be, for example, a driver model that outputs output quantities for each of the emotional state and the cognitive load in response to the physiological characteristic, the interaction and the traffic situation separately from each other. In contrast to the prior art, it is proposed to carry out a differentiated analysis of the emotional state and of the cognitive load within a system in order to be able to prepare and / or carry out a respective influence on the respective causes. According to the invention, therefore, it is possible to respond more clearly to an up-to-date vehicle management competence in a much more targeted, needs-based and therefore more successful manner. As a result, participation in traffic becomes safer for both the driver and the road users in his environment.

The invention makes it possible to take into account the specific built-in actuator in the vehicle for the support of the driver of the means of transport. This actuator has been proven to positively affect the emotional state or cognitive load of the driver. The assistance of the driver of the means of locomotion is a key point of the present invention. While prior art systems merely alert the driver to a limitation, the present invention is preferably used to assess the driver's condition (emotional and cognitive) and the driver's control over a closed-loop system to optimize to affect the driver's ability to do so through appropriate driver modeling. In other words, influence on the condition of the driver is taken, the change of the condition of the driver sensory detected again and adapted the influence as needed. The physiological characteristic may include, for example, an eye movement characteristic and / or a blink rate and / or a heart rate and / or a characteristic for the blood pressure and / or an electrical conductance of the skin and / or an acoustic property of the driver's voice and / or body temperature. The eye movement characteristic can be detected, for example, by an optical sensor (for example a camera) and fed to an evaluation unit. The same applies to a blink rate. The skin conductance can be detected by a corresponding non-intrusive sensor in the steering wheel, The acoustic property of the voice can be recorded for example via a microphone (for example, a telephone system of the means of locomotion) and evaluated in terms of a time and / or frequency response in an evaluation. Sensor systems and implementations which can be used to implement the present invention are already known in the prior art for the other physiological parameters mentioned.

The control element, by means of which the driver undertakes the interaction to be detected, can be a steering wheel and / or an accelerator pedal and / or a brake pedal and / or a clutch pedal and / or an element for gear or gear selection (shift knob, speed selection element) and / or another element in the primary perception of the driving task and / or an operating and / or switching element in the interior of the means of transportation (eg for operating a user interface of an infotainment system).

The traffic parameter may be, for example, distance information of surrounding objects (for example other road users) which can be determined by means of radar and / or lidar and / or ultrasound sensors and laser scanners. Accordingly, the cruising speed of the means of transportation or a traffic jam can be used as a traffic parameter or characterize the traffic parameter. Thus, the quantification of the driver can take into account an up-to-date traffic situation and thus resolve ambiguities in order to influence the driver based on the cause later on.

Based on the first assessment of the emotional state and / or based on the second assessment of the driver's cognitive load, a mode of operation of the means of locomotion may be adapted for positive influence. For example, an operating state of a driver assistance system and / or a transmission / chassis and / or an adjustment of a light source (for example in a combination instrument, in particular in the form of a light intensity, ambient lighting, backlighting of controls, etc.) with respect to a light color and / or an intensity in the interior are made and / or a playback volume of an acoustic source in the interior of the means of transport are automatically adjusted or ambient noise are hidden. Alternative ways to positively influence the Drivers consist in an active emission of olfactory perceptible substances as well as an activation of a massage function (eg a massage seat). In this way, the knowledge about sub-optimal vehicle driving competence classes can be used as a reference for improving the driving comfort or driving safety.

• – Audioakustische Stimuli wie Musik oder Geräusche
• – visuelle Stimuli wie Lichteffekte oder Beleuchtungen
• – Olfaktorische Stimuli wie z.B. Gerüche/Düfte
• – Haptische Stimuli wie z.B. Massage oder Feedback durch Druck oder Vibration in Sitz oder Lenkrad
• – Stimuli durch Änderung der Temperatur oder des Sauerstoffgehalts/CO2 Gehalts der Atemluft.

One way to adjust the operating state of the vehicle may be to issue a stimulus. For example, stimuli can be

• - Audio-acoustic stimuli such as music or sounds
• - visual stimuli such as lighting effects or lighting
• - Olfactory stimuli such as odors / fragrances
• - Haptic stimuli such as massage or feedback by pressure or vibration in the seat or steering wheel
• - Stimuli by changing the temperature or the oxygen content / CO2 content of the respiratory air.

The reference can be stored, for example, in the form of a table work and / or in the form of a mathematical model. In particular, the mathematical model takes into account predefined dependencies between the input quantities in the output of the first and second judgments. A further possibility for improved adaptation of the method consists in a driver-specific learning module which adapts to an individual driver (for example taking into account quantitatively perceptible characteristics of the driver (for example by driver identification based on a vehicle key, mass, size, voice).

Alternatively or additionally, the first assessment of the emotional state may include a first information characterizing a valence (ie a positive or negative mood). In addition, the first score may include second information identifying a wakefulness (arousal or arousal). Thus, different aspects of the emotional state can be considered and in particular influenced.

Preferably, the reference may make an assessment of suitability of the driver's interaction with the control of the means of transportation in view of the traffic situation. In this way, operator errors or misjudgements of the traffic situation can be detected and used to classify a current cognitive load condition of the driver. In this way, more information can be used as the basis for the first and the second evaluation.

According to a second aspect of the present invention, there is provided an apparatus for independently judging an emotional state and a cognitive load of a driver of a vehicle. The apparatus comprises storage means for holding an electronic reference (e.g., a mathematical model and / or a spreadsheet) and sensors arranged to detect a physiological characteristic of the driver. In addition, means for detecting an interaction of the driver with an operating element of the means of transportation are provided. These means may be, for example, the sensors inherently assigned sensors, which are provided for starting associated with the controls functions. Alternatively or additionally, the means for detecting the interaction can also capture or describe and analyze those interactions which are not suitable for starting the function assigned to the operating element. An example of such an interaction is a tap on a steering wheel rim of a steering wheel or on a shift knob.

In addition, means for detecting a traffic situation of the means of locomotion are provided, which can detect, for example, sensors for environment detection. An evaluation unit can be provided, for example, in the form of an electronic control unit, a microcontroller, a nanocontroller and / or in the form of a programmable processor, wherein the evaluation unit is set up, using the physiological parameter as well as the interaction and the traffic situation, a first evaluation of the emotional state of the Driver and a second assessment of the driver's cognitive load using the electronically provided reference. The features, combinations of features and the advantages resulting therefrom correspond to those embodied in connection with the first aspect of the invention so clearly that reference is made to the above statements to avoid repetition.

According to a third aspect of the present invention, a driver assistance system is proposed which comprises a device according to the invention according to the second-mentioned aspect of the invention and an actuator by which an information is output to the driver or a signal for changing a mode of operation of the means of locomotion to assist the driver in guiding the Means of transport can be issued. The latter signal, for example, activate a lateral and / or longitudinal guidance of the means of transport or output information messages for the objective improvement of the driving condition in critical driving conditions to the driver. The actuation may be due to the present Invention have an improved reference to the cause of the driver to be changed state. In other words, depending on the circumstances under which the cognitive load or the emotional state can be improved, one or the other, that is, the appropriate action, may be taken.

According to a fourth aspect of the present invention, there is proposed a transportation means (e.g., a car, a van, a truck, an air and / or water vehicle) comprising a device according to the second aspect of the invention and / or a driver assistance system according to the third aspect of the invention. The features, feature combinations and the advantages resulting from these also correspond to the above statements.

Further details, features and advantages of the invention will become apparent from the following description and the figures. Show it:

1 an illustration of emotional states in the context of attention research on the dimensions "valence" (X-axis) and "arousal"(Y-axis);

2 a diagram for the model representation of the connection and the cross-influencing of emotional states and cognitive states;

3 a block diagram of an embodiment of a device according to the invention;

4 an overview of components of an embodiment of a device according to the invention in an embodiment of a means of transport according to the invention; and

5 a flowchart illustrating steps of an embodiment of a method according to the invention.

1 Fig. 12 shows a possibility of the two dimensions "valence" (X-axis) and "arousal" (Y-axis) of an emotional state of a driver of a means of locomotion in a diagram 100 apply against each other. On the X-axis, unpleasant states A and comfortable states B are plotted horizontally and listlessness C against an excitation state D. Accordingly, the detection and evaluation of the mutually perpendicular states are possible and proposed according to the invention to improve the precision of knowledge and measures.

2 shows a diagram to model the relationship and the cross-influencing of emotional and cognitive states, using a cognitive and emotional human model 210 an electronic reference of the model 200 represents. The task or the environment 220 of the cognitive and emotional human model 210 becomes through the senses ("perception") 211 recorded and computationally in an evaluation unit 213 processed. In a block 212 the cognitive control takes place in response to which the perception 211 is focused. block 212 also affects emotions 215 and an energy regulation 214 of the human model 210 out. In addition, the emotions affect 215 the energy regulation 214 which in turn influences the computational processing of the impressions in block 213 Has. The emotional state of the driver influences from the block 215 thus also impacting the driver's cognitive load in block 213 which are the motor issues 216 of the driver. The emotions can thus influence the cognitive states by influencing the energy regulation. For example, driving pleasure releases concentration and raises the driver's performance. Fear, on the other hand, reduces the ability to concentrate. Cognitively demanding tasks can create a sense of stress.

3 shows a block diagram of a control system according to the invention 300 , An exemplary (desired) emotional state 310 and an exemplary (desired) cognitive state 320 are used as input variables for comparators 319 respectively. 329 used. The comparators 319 respectively. 329 In addition to these input values, actual cognitive or emotional states are obtained from a person-dependent cognitive and emotional state model 390 the driver. From the comparators 319 respectively. 329 become emotional measures 330 and cognitive measures 340 taken and adapt the human-machine interaction 350 used. The effects of customized man-machine interaction 350 Psycho-physiological measurements, brain waves, video data of the driver's facial expressions, video data of the driver's eyes, information of the machine and information of interactions as sensors 360 supervised. From the sensor data are in block 370 Features and then a classifier 380 fed. The evaluation of the classified features is again based on the model 390 ,

4 shows a car 10 as a means of transport, in which an embodiment of a device according to the invention is installed. A driver 1 interacts with a steering wheel 2 as well as with a keyboard 11 a user interface, which also has a screen 12 as output unit. The interactions of the user 1 with the steering wheel 2 , the keyboard 11 and an accelerator pedal 9 as well as the video data of an optical camera 6 and the audio of an audio-acoustic microphone 5 , from an electronic control unit 4 evaluated as evaluation unit. In addition, the electronic control unit receives 4 Temperature and conductivity values of electronic sensors of the driver's seat 7 , A driver model as an electronically held reference stands by an information technology with the electronic control unit 4 connected data storage 3 ready. In addition, in the front bumper is an ultrasonic sensor 8th provided as an environmental sensor for detecting and assessing a traffic situation and also information technology with the electronic control unit 4 connected.

5 shows steps of an embodiment of a method according to the invention for the independent assessment of an emotional state and a cognitive load of a driver of a means of locomotion. In step S100, a physiological characteristic of the driver is sensed. In step S200, an interaction of the driver with an operating element of the means of transport is detected by information technology. In step S300, a traffic situation of the means of locomotion is determined and, using the physiological parameter as well as the interaction and the traffic situation in step S400, a first assessment of the driver's emotional state and a second assessment of the driver's cognitive load are determined using an electronically held reference. In step S500, an operating mode of the vehicle is adjusted in response to the first evaluation and the second evaluation. In other words, to improve the performance or the well-being of the driver, an adaptation of the driver's environment via a combination of climate, light, air, driver assistance, etc. made. Here, an operating state of a driver assistance system is changed such that the arousal value is changed in the direction of an ideal arousal value (target value). Of course, the aforementioned method may be executed as a closed-loop, so that after step S500, the execution of step S100 for automatically acquiring a physiological parameter of the driver is automatically continued.

• – psycho-physiologische Messungen
• – Hirnströme
• – Videodaten der Gesichtsausdrücke
• – Videodaten der Augen
• – Informationen der Umgebung („Verkehrssituation“)
• – Informationen von Interaktionen

In order to enable an automatic quantification of the dimensions of emotional state and cognitive load, intelligent algorithms, in particular so-called machine-learning algorithms, can process the input variables "physiological parameter", "driver's interaction" and the "traffic situation". Because cognitive and emotional states vary subjectively, and knowledge of individual states and adjustments allows a more accurate prediction of both an individual's emotional and cognitive states, these machine-learning algorithms must receive single, multiple, or all of the following data as input quantities:

• - psycho-physiological measurements
• - brain waves
• - Video data of the facial expressions
• - Video data of the eyes
• - Information of the environment ("traffic situation")
• - Information of interactions

These data can be processed, for example, by means of automatic classification algorithms to classify emotional states and cognitive states separately and individually. Depending on the desired emotional and cognitive state, measures are taken which individually "regulate" the individual to the desired state, whereby separate emotional and cognitive measures are taken. In this way, any desired emotional and cognitive state in humans can be adjusted, provided that suitable actuators are available.

• – Höhere Fahrperformance

By means of the individual measurement of cognitive and emotional state of the driver proposed according to the invention, various psychological needs (eg competence, safety, autonomy, physicality / stimulation, etc.) of the driver can be addressed in order to increase situational positive customer experiences when driving a car. Needs can be addressed through specific stimuli. This can be done for example by the built-in actuator in the vehicle. Specifically, a "physical" influencing the driver is made, which addresses the needs of the driver and by satisfying these needs leads to positive emotions in the driver. The following examples are conceivable:

• - Higher driving performance

• – Höhere Sicherheit

By acting on an improved emotional and cognitive state, the driving quality and thus the sovereignty of the driving style increases. It enters the driver a competence experience and thus the driving pleasure is further increased. This in turn affects the emotional state. Overall, the positive driving experience will be enhanced and ride quality will be further enhanced.

• - Higher security

• – Höherer Komfort

On an emotional level, anxiety, stress or fatigue can negatively affect the driver's concentration and driving ability and lead to an increased accident risk. At the cognitive level, an excessive demand of the driver can lead to the driver of the driving task (incl. Additional task (s)) ), which also increases the accident risk.

• - Higher comfort

By deliberately reducing stress or anxiety, by using existing actuators in the vehicle and by specifically reducing fatigue and targeted reduction of cognitive overload, the driver's sense of well-being and comfort can be increased.

In contrast to the prior art, not only the emotional state and the cognitive state of the user are generally affected. The aspects according to the invention allow the individually differentiated quantification of emotional and cognitive states and the selection of individual measures by the actuators installed in the vehicle, which are to change the respective state. This is dependent on whether the emotional or cognitive state of the user is to be changed.

LIST OF REFERENCE NUMBERS

1

driver

2

steering wheel

3

data storage

4

electronic control unit

5

microphone

6

optical camera

7

Driver's seat (with conductivity sensors)

8th

ultrasonic sensor

9

accelerator

10

car

11

keyboard

12

screen

100

Differential of emotional states

200

model

210

cognitive and emotional human model

211

perceptions

212

cognitive control

213

computational processing

214

Energy Regulation

215

emotions

216

motor issues

220

Task / ambient

300

Block diagram of the control system according to the invention

310

desired emotional state

319

comparator

320

desired cognitive state

329

comparator

330

emotional measures

340

cognitive measures

350

Human-Machine Interaction

360

sensors

370

feature extraction

380

classifier

390

 person-dependent cognitive and emotional state of the driver

A

unpleasant emotional state

B

pleasant feeling

C

passive state

D

excited state

S100-S500

steps

X

valence

Y

Arousal arousal

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 4307071 A [0008]
• WO 2004091371 A2 [0009]
• US 20010042004 A1 [0010]

Claims (11)

Method for independently assessing a driver's emotional state and cognitive load ( 1 ) of a means of transportation ( 10 ) comprising the steps: - sensory detection ( 100 ) a physiological characteristic of the driver ( 1 ), - information technology acquisition ( 200 ) an interaction of the driver with a control element ( 2 ) of the means of locomotion ( 10 ), - Determine ( 300 ) a traffic situation of the means of transport ( 10 ), and using the physiological parameter as well as the interaction and the traffic situation - determining ( 400 ) an initial assessment of the driver's emotional state ( 1 ) and a second assessment of the driver's cognitive load ( 1 ) using an electronically prepared reference ( 210 ). The method of claim 1, wherein the physiological parameter - an eye movement characteristic, and / or - a blink rate, and / or - derived from an electrocardiogram parameters, in particular a heart rate, and / or - a characteristic for a blood pressure, and / or - a electrical conductance of the skin, and / or - an acoustic property of the voice, and / or - a body temperature - a respiratory rate of the driver ( 1 ). Method according to claim 1 or 2, wherein the operating element of the means of locomotion ( 10 ) - a steering wheel ( 2 ) and / or - an accelerator pedal ( 9 ) and / or - a brake pedal and / or - a clutch pedal and / or - an element for speed selection and / or - another element for use in the perception of the driving task, and / or - a control and / or Switching element ( 11 ) for generating or switching an electrical signal in the interior of the means of locomotion ( 10 ). Method according to one of the preceding claims, wherein the traffic parameter - a distance information of surrounding objects, in particular road users, and / or - a cruising speed of the means of transportation ( 10 ) and / or - indicates a traffic jam. The method of any one of the preceding claims, further comprising based on the first assessment of the emotional state and / or based on the second assessment of the cognitive load - adjusting ( 500 ) an operating mode of the means of locomotion ( 10 ), in particular - an existing in the vehicle actuators and / or - an operating state of a driver assistance system and / or - an operating state of a transmission, and / or - an adjustment of a light source in the interior, - a playback volume of an acoustic source in the interior of the means of transport ( 10 ). Method according to one of the preceding claims, wherein - the reference ( 210 ) is stored in the form of a table work and / or in the form of a mathematical model and / or the first evaluation of the emotional state comprises a first information characterizing a valence (X) and a second information having a wakefulness (Y). Method according to one of the preceding claims, wherein - the reference ( 210 ) an assessment of suitability of the interaction of the means of transport ( 10 ) in view of the traffic situation.  Method according to one of the preceding claims, which is carried out as a closed loop control. Device for independent assessment of a driver's emotional state and cognitive load ( 1 ) of a means of transportation ( 10 ) comprising: - storage means ( 3 ) to provide an electronic reference ( 210 ), - a sensor which is set up to detect a physiological characteristic of the driver, - means for detecting an interaction of the driver ( 1 ) with a control element ( 2 . 9 . 11 ) of the means of locomotion ( 10 ), - Medium ( 8th ) for determining a traffic situation of the means of transportation ( 10 ), and - an evaluation unit ( 4 ), which is set up, using the physiological parameter as well as the interaction and the traffic situation - a first assessment of the emotional state of the driver ( 1 ) and a second assessment of the driver's cognitive load ( 1 ) based on the electronically provided reference ( 210 ) to investigate. Driver assistance system comprising - an apparatus according to claim 9, and - an actuator ( 12 ) for outputting an information or a stimulus to the driver or a signal for changing an operation of the Means of locomotion ( 10 ) in support of the driver ( 1 ) in the management of the means of transport ( 10 ). Means of transportation ( 10 ) - a device according to claim 9 and / or - a driver assistance system according to claim 10.

Images