Interactive system and associated interaction method

Abstract

Interactive system (1) with at least one user occupying a vehicle, in particular a car, said system comprising: - At least one sensor (7) arranged to provide a measurement of at least one physiological sign (10), in particular a heart rate and / or a respiratory rate relating to the user, - At least one camera (2) arranged to record at least one image (12) of the user, - A control unit (3) configured to, from the measurement of said physiological sign (10), deduce at least one physiological state (11) of the user, - A display device (8) arranged to display the recorded image (17) and information to assist in carrying out an exercise (15, 19). Abstract figure: Fig. 2

Description

Title of the invention: Interactive system and associated interaction method

[0001] The present invention relates to an interactive system with at least one user occupying a motor vehicle, in particular a motor vehicle. The invention also relates to a method of interacting with a user occupying a motor vehicle, in particular a motor vehicle.

[0002] The transition to autonomous or semi-autonomous vehicles presents more and more issues and challenges in terms of creating an intelligent, intuitive vehicle that makes driving and / or traveling more pleasant and safer for the vehicle's occupants. In particular, improvements can be focused on safety, comfort and entertainment. In such autonomous or semi-autonomous vehicles, passengers and drivers are given more free time during which they can, in particular, have fun or rest. After a period of manual driving, the driver may be subject to stress or active fatigue (cognitive overload due here to driving) due to a long period of manual driving or a period of stressful driving (traffic jams, user behavior, etc.). The driver may also be subject to passive fatigue (cognitive underload) which can generate a lack of vigilance in the driver.In both cases, it is necessary for the driver to re-establish a state of “calm alertness” either by switching to automated driving or by stopping.

[0003] Today there are exercises, including breathing exercises such as cardiac coherence exercises, which alleviate stress, active fatigue, or passive fatigue by promoting a state of calm alertness.

[0004] There is now a real need to help the driver of an autonomous vehicle to better manage his fatigue and stress to bring him to a level of calm vigilance and improve user safety, particularly when regaining control of the vehicle.

[0005] The purpose of the present invention is to provide a system and a method for bringing the driver to a level of calm alertness for safer driving.

[0006] The invention relates to an interactive system with at least one user occupying a vehicle, in particular a car, said system comprising: - At least one sensor arranged to provide a measurement of at least one physiological sign relating to the user, - At least one camera arranged to record at least one image of the user, - A control unit configured to, from the measurement of said physiological sign, deduce at least one physiological state of the user, - A display device arranged to display the recorded image and information to assist in the completion of an exercise.

[0007] Thus, the system allows the user to become aware of his state by seeing himself as he is before starting an exercise by seeing the recorded image, and helps him to perform an exercise to relax him and bring him to a state of calm alertness.

[0008] According to one aspect of the invention, the physiological sign is a physiological sign having a measurable frequency, for example a heart rate or a respiratory rate.

[0009] According to one aspect of the invention, the display device is arranged to display the measurement of at least one physiological sign, for example a heart rate or respiratory rate. For example, the display device is arranged to display a tachogram in real time. The tachogram corresponds to the curve which displays the variability of the heart rate (expressed in beats per minute, Bpm) as a function of time.

[0010] The user can thus become aware of his physiological state, in particular his state of stress or his state of fatigue.

[0011] According to one aspect of the invention, the system is arranged to propose an exercise to the user, in particular a breathing exercise and more precisely a cardiac coherence exercise, according to his deduced physiological state until he reaches a target physiological state. A cardiac coherence exercise consists of doing six breathing cycles for five minutes.

[0012] By target physiological state is meant here a physiological state of calm alertness. This target physiological state can be achieved through a cardiac coherence exercise. This target physiological state is characterized in particular by a correlation between the heart rate and the respiratory rate of the user, and / or by a respiratory rate between 0.06 Hertz and 0.12 Hertz.

[0013] According to one aspect of the invention, the at least one sensor is arranged to continuously provide a measurement of at least one physiological sign throughout the duration of the exercise.

[0014] According to one aspect of the invention, the at least one sensor is arranged to provide in real time a measurement of at least one physiological sign throughout the duration of the exercise.

[0015] According to one aspect of the invention, the system comprises at least one first sensor arranged to provide a measurement of the user's respiratory rate and at least one second sensor arranged to provide a measurement of the user's heart rate. the user.

[0016] According to one aspect of the invention, the first and second sensors are arranged to continuously provide a measurement of the heart rate and the respiratory rate in real time throughout the duration of the exercise.

[0017] According to one aspect of the invention, at least one sensor may be a contactless sensor.

[0018] Alternatively, at least one sensor may be a sensor arranged to be in contact with a part of the user's body, for example a sensor arranged on the steering wheel arranged to, in contact with the user's hands, measure at least one physiological sign relating to the user.

[0019] According to one aspect of the invention, the system is arranged to suggest to the user to perform an exercise according to the physiological state deduced by the control unit and to display information to assist in the performance of said exercise by the display device.

[0020] According to one aspect of the invention, the control unit is arranged to compare the measurement of the physiological sign provided by the sensor with data representative of a state of fatigue of the user, in particular active fatigue or passive fatigue, and to suggest to the user to perform an exercise according to the result of this comparison.

[0021] Alternatively, the control unit is arranged to compare the measurement of the physiological sign provided by the sensor with data representative of the target physiological state to be achieved, in particular a state of calm alertness, and to suggest to the user to perform an exercise according to the result of this comparison. Thus, as long as the measurement of the physiological sign provided by the sensor does not correspond to the data representative of the target physiological state, the display device is arranged to display information to assist in performing an exercise.

[0022] According to one aspect of the invention, the control unit is arranged to check whether the user reaches the target physiological state. In other words, the control unit is arranged to check the user's ability to be in cardiac coherence during the exercise.

[0023] According to one aspect of the invention, the control unit is arranged to verify that the respiratory rate is between 0.06 and 0.12 Hertz, preferably is approximately 0.1 Hertz and / or that the heart rate is correlated with the respiratory rate. Indeed, when we perform a cardiac coherence exercise, we adopt a breathing rate of six cycles per minute. At this frequency, the heart synchronizes with the respiratory cycles and the respiratory rate has a value of approximately 0.1 Hertz.

[0024] According to one aspect of the invention, the control unit is arranged to modify the recorded image progressively throughout the exercise to obtain an image gradually changed throughout the exercise.

[0025] According to one aspect of the invention, the control unit is arranged to modify the recorded image until an image is obtained representing the user as he could be at the end of the duration of the exercise, in other words an image of the user rested and relaxed.

[0026] According to one aspect of the invention, the control unit is arranged to modify the recorded image as a function of the measurement provided by the sensor.

[0027] According to one aspect of the invention, the control unit is arranged to modify the recorded image progressively throughout the exercise depending on the evolution of its physiological state.

[0028] In other words, the control unit is arranged to progressively modify the recorded image so as to display a representation of the user who is increasingly relaxed and rested as the measurement provided improves during exercise.

[0029] According to one aspect of the invention, the modified image may be a three-dimensional representation of the user or a part of his body, in particular his face. For example, the modified image is an avatar of the user.

[0030] According to one aspect of the invention, the display device is arranged to display the image recorded by the camera before the start of the exercise, then the artificially modified image during the exercise, then again the image recorded by the camera at the end of the exercise.

[0031] According to one aspect of the invention, the display device is arranged to display the recorded or modified image of the user on a screen or in space, in particular in the form of a hologram.

[0032] According to one aspect of the invention, the display device is arranged to first display the recorded image then the image modified by the control unit during the exercise, in particular progressively.

[0033] According to one aspect of the invention, the display device is arranged to simultaneously display the recorded image or the modified image and the information providing assistance in carrying out the exercise.

[0034] According to one aspect of the invention, the information to assist in performing the exercise may be a representation of a part of the user's body, in particular a representation of his lungs, during the performance of the exercise, a representation of the air circulating in his airways during the performance of the exercise, for example in the form of a ball which rises and falls in his trachea, a representation of the circulation of his blood leaving the heart and going to irrigate his muscles, a representation of the stages of performance of the exercise.

[0035] According to one aspect of the invention, the information to assist in the accomplishment of The exercise can be the image gradually modified during the exercise. Indeed, by visualizing themselves doing the exercise the user will be in better conditions to carry it out.

[0036] By visualizing a representation of himself performing the exercise, the user can thus perform the exercise more efficiently. Indeed, the invention uses the principle of mirror neurons, which allow neurons to activate when the individual does or sees an action, in this case, the breathing exercise, and the activation of these neurons aims to improve learning and therefore the efficiency of the exercise. Thus, by seeing himself doing the exercise, and by seeing an artificially modified image of himself according to which the exercise works well, the user will see his physiological state improve more quickly.

[0037] According to one aspect of the invention, the control unit is arranged to calculate: - A state change score, - An exercise performance score.

[0038] According to one aspect of the invention, the control unit is arranged to calculate the state change score as a function of the measurement provided by said at least one sensor throughout the exercise.

[0039] Alternatively, the control unit is arranged to calculate the state change score only at the end of the exercise based on the measurement provided at the start of the exercise and at the end of the exercise.

[0040] According to one aspect of the invention, the display device is arranged to display the state change score calculated by the control unit.

[0041] By state change score, here is meant a score representative of the evolution of the physiological state of the user. For example, the state change score may represent the transition from a physiological state deduced before the exercise corresponding to a state of fatigue or stress to a state of calm alertness, in other words a rested and calm state. According to one aspect of the invention, the display device is arranged to display the performance score of the exercise.

[0042] By exercise performance score, here is meant a score representative of the user's ability to perform the exercise well.

[0043] According to one aspect of the invention, the control unit is arranged to, at the end of the exercise, display the image of the user recorded by the camera at the end of the exercise.

[0044] In this way, the user can see the effect the exercise had on him.

[0045] The present invention also relates to a vehicle, in particular a motor vehicle, comprising the system described above.

[0046] The present invention also relates to a driving assistance method allowing for a user to achieve a target physiological state comprising the following steps: - measurement of at least one physiological sign relating to the user by a sensor, - recording an image of the user by a camera, - deduction of a physiological state from the measurement of the physiological sign by a control unit, - display of the recorded image and information to assist in completing an exercise by a display device.

[0047] The method according to the invention helps the user to achieve a state of calm alertness, a state which will allow him to drive more safely and serenely.

[0048] According to one aspect of the invention, the driving assistance method is implemented in a system as described previously.

[0049] According to one aspect of the invention, the method comprises a step of displaying by the display device the physiological measurement measured by the sensor.

[0050] According to one aspect of the invention, the method comprises a step of proposing an exercise to the user by the system as a function of his deduced physiological state and the target physiological state, in particular a cardiac coherence exercise.

[0051] According to one aspect of the invention, the at least one physiological sign is measured by the sensor continuously throughout the duration of the exercise.

[0052] According to one aspect of the invention, the at least one physiological sign is measured by the sensor in real time throughout the duration of the exercise.

[0053] According to one aspect of the invention, the physiological sign is a physiological sign having a measurable frequency, for example a heart rate or a respiratory rate.

[0054] According to one aspect of the invention, the method comprises a step of measuring a respiratory rate of the user and a step of measuring a heart rate of the user, the two measurement steps preferably being able to be carried out simultaneously, preferably by different sensors.

[0055] According to one aspect of the invention, the method comprises a step of verification by the control unit of the user's ability to be in cardiac coherence.

[0056] According to one aspect of the invention, the verification step consists of verifying that the respiratory frequency is between 0.06 and 0.12 Hertz, preferably is approximately 0.1 Hertz and / or that the heart rate is correlated with the respiratory rate. Indeed, when we perform a cardiac coherence exercise, we adopt a breathing at the frequency of six cycles per minute. At this frequency, the heart synchronizes with the respiratory cycles and the respiratory rate has a value of approximately 0.1 Hertz.

[0057] According to one aspect of the invention, the method comprises a step of modification by the control unit of the recorded image, and a step of displaying said modified image by the display device. For example, the modified image may be a three-dimensional representation of the user or of a part of his body, in particular of his face. For example, the modified image is an avatar of the user.

[0058] According to one aspect of the invention, during the method, the image recorded by the camera in real time is first displayed by the display device before the start of the exercise, then the image artificially modified during the exercise is displayed, then again the image recorded by the camera in real time at the end of the exercise is displayed.

[0059] According to one aspect of the invention, the recorded or modified image of the user is displayed on a screen or in space, in particular in the form of a hologram.

[0060] According to one aspect of the invention, the method comprises a step of comparing the measurement of the physiological sign provided by the sensor with data representative of a state of fatigue of the user, in particular active fatigue or passive fatigue, then proposing to the user to perform an exercise according to the result of this comparison.

[0061] Alternatively, the method comprises a step of comparing the measurement of the physiological sign provided by the sensor with data representative of the target physiological state to be achieved, in particular a state of calm alertness, then proposing to the user to perform an exercise according to the result of this comparison. Thus, as long as the measurement of the physiological sign provided by the sensor does not correspond to the data representative of the target physiological state, the system is arranged to propose to the user to perform an exercise.

[0062] The exercise may for example be a breathing exercise, in particular a cardiac coherence exercise which consists of doing six breathing cycles for five minutes.

[0063] According to one aspect of the invention, the recorded image is modified progressively throughout the exercise until an image is obtained representing the user as he could be at the end of the duration of the exercise, in other words an image of the user rested and relaxed.

[0064] According to one aspect of the invention, the recorded image is modified throughout the exercise as a function of the measurement provided by the sensor or of the evolution of the physiological state in a progressive manner.

[0065] According to one aspect of the invention, the control unit is arranged to modify the recorded image progressively throughout the exercise depending on the evolution of its physiological state.

[0066] In other words, the control unit is arranged to gradually modify the image recorded in such a way as to display a representation of the user becoming increasingly relaxed and rested as the measurement provided improves during exercise.

[0067] According to one aspect of the invention, during the method, the recorded image then the image modified by the control unit during the exercise are displayed by the display device, in particular progressively.

[0068] According to one aspect of the invention, the recorded image or the modified image and the information for assisting in carrying out the exercise are displayed simultaneously by the display device.

[0069] According to one aspect of the invention, the information to assist in performing the exercise may be a representation of a part of the user's body, in particular a representation of his lungs, during the performance of the exercise, a representation of the air circulating in his airways during the performance of the exercise, for example in the form of a ball which rises and falls in his trachea, a representation of the circulation of his blood leaving the heart and going to irrigate his muscles, a representation of the stages of performance of the exercise.

[0070] According to one aspect of the invention, the method comprises a step of calculation by the control unit: - A state change score, - A performance score for the exercise.

[0071] According to one aspect of the invention, the state change score is calculated based on the measurement provided by said at least one sensor.

[0072] Alternatively, the control unit calculates the state change score only at the end of the exercise.

[0073] According to one aspect of the invention, the display device displays the state change score calculated by the control unit.

[0074] By state change score, here is meant a score representative of the evolution of the physiological state of the user. For example, the state change score may represent the transition from a physiological state deduced before the exercise corresponding to a state of fatigue or stress to a state of calm alertness, in other words a rested and calm state. According to one aspect of the invention, the display device is arranged to display the performance score of the exercise.

[0075] By exercise performance score, here is meant a score representative of the user's ability to perform the exercise well.

[0076] According to one aspect of the invention, the display device displays the exercise performance score calculated by the control unit at the end of the exercise.

[0077] According to one aspect of the invention, at the end of the exercise, the display device displays the image of the user recorded by the camera at the end of the exercise.

[0078] Other characteristics and advantages of the present invention will appear more clearly on reading the following description, provided for illustrative and non-limiting purposes, and the appended drawings in which:

[0079] [Fig-1] [Fig.l] is a schematic representation of a motor vehicle comprising an interactive system with at least one user occupying a vehicle according to the invention;

[0080] [Fig.2] [Fig.2] is a schematic representation of the system according to the invention;

[0081] [Fig.3] [Fig.3] is a representation of a user's heart rate in a physiological state of stress and during a cardiac coherence exercise.

[0082] [Fig.l] represents a motor vehicle 100 comprising a passenger compartment 9 in which a user P is installed to drive. The vehicle 100 is for example an autonomous or semi-autonomous vehicle. Thus, the user P installed in the vehicle has manual driving phases, and autonomous driving phases. The user P may be subjected to stress during a manual driving phase or to passive fatigue during an autonomous driving phase. In both cases, the driver may have a drop in alertness and it is necessary to bring him to a target physiological state of calm alertness. For this, the vehicle comprises an interactive system 1 with the user P occupying the vehicle, preferably the driver, said system comprising: - At least one sensor 7 arranged to provide a measurement of at least one physiological sign relating to the user, - At least one camera 2 arranged to record at least one image of the user, - A control unit 3 configured to, from the measurement of said physiological sign, deduce at least one physiological state of the user, - A display device 8 arranged to display the recorded image and information to assist in carrying out an exercise.

[0083] In this example, the camera is arranged at the level of the dashboard 5 of the vehicle. It could be arranged at any location in the vehicle allowing at least one image of the user's face to be recorded.

[0084] In this example, the sensor 7 for measuring at least one physiological sign is arranged on the ceiling 4 of the motor vehicle 100. The sensor 7 is then a contactless sensor 7. The sensor could be arranged anywhere in the vehicle allowing the sensor to measure at least one physiological sign relating to the user without contact or in contact with said user. It could, for example, be arranged on the steering wheel of the vehicle.

[0085] [Fig.2] describes in more detail the system 1 according to the invention. As previously stated, the system 1 comprises: - At least one sensor 7 arranged to provide a measurement of at least one physiological sign 10 relating to the user, - At least one camera 2 arranged to record at least one image 12 of the user, - A control unit 3 configured to, from the measurement of said physiological sign 10, deduce at least one physiological state 11 of the user, - A display device 8 arranged to display the recorded image 18 and at least one piece of information to assist in carrying out an exercise 15, 19.

[0086] The system allows the user to become aware of his state by seeing himself as he is before starting an exercise by seeing the recorded image, and helps him to perform an exercise to relax him and bring him to a state of calm alertness.

[0087] The system comprises for example two sensors, one being arranged to provide a measurement of the user's heart rate, and the other sensor being arranged to provide a measurement of the user's respiratory rate.

[0088] According to one aspect of the invention, the display device is arranged to display a measurement of at least one physiological sign (displayed physiological measurement 17). For example, the display device is arranged to display a heart rate measurement. Thus, the physiological measurement displayed 17 by the display device 8 may be a real-time tachogram. The tachogram corresponds to the curve which displays the variability of the heart rate (expressed in beats per minute, Bpm) as a function of time.

[0089] The user can thus become aware of his physiological state, in particular his state of stress or his state of fatigue.

[0090] The sensor is arranged to provide physiological sign measurements throughout the exercise continuously and in real time.

[0091] As indicated previously, this sensor 7 may be a contactless sensor or may require contact with the user to provide the measurement of the physiological sign 10. This may be the case in particular for sensors arranged on the steering wheel and intended to come into contact with the user's hands.

[0092] The control unit 3 deduces a physiological state 11 of the user based on the measurement(s) of physiological signs 10 carried out by the sensor 7.

[0093] The control unit 3 is arranged to compare the measurement of the physiological sign 10 provided by the sensor with data 20 representative of the target physiological state 13 to be achieved, in particular a state of calm alertness, and to propose to the user to perform an exercise according to the result of this comparison. Thus, as long as the measurement of the physiological sign 10 provided by the sensor does not correspond to the data representative 20 of the target physiological state, the display device is arranged to display information to assist in the performance of an exercise 15, 19.

[0094] Depending on this deduced physiological state 11, the system 1 is arranged to propose an exercise to the user such as a cardiac coherence exercise, so that the user reaches a target physiological state called calm vigilance. The display device 8 is thus arranged to display information to assist in the accomplishment of an exercise 15, 19 depending on the deduced physiological state 11 and more particularly depending on the comparison made between the physiological measurement 10 and the representative data 20 of the target physiological state 13.

[0095] The physiological state of calm vigilance is notably achieved when the user enters into cardiac coherence, that is to say that his heart rate and respiratory rates are correlated and that the respiratory rate has a frequency between 0.06 hertz and 0.12 hertz.

[0096] To determine whether the user reaches or approaches the target physiological state 13, the control unit 3 is arranged to check whether the user reaches the target physiological state 13. In other words, the control unit is arranged to check the user's ability to be in cardiac coherence. For this, the control unit is arranged to check that the respiratory rate is between 0.06 and 0.12 Hertz, preferably is about 0.1 Hertz and / or that the heart rate is correlated with the respiratory rate. Indeed, when we perform a cardiac coherence exercise, we adopt a breathing at the frequency of six cycles per minute. At this frequency, the heart synchronizes with the respiratory cycles and the respiratory rate has a value of about 0.1 Hertz.

[0097] The control unit 3 is also arranged to modify the recorded image 13 progressively throughout the exercise to obtain a modified image 16 progressively throughout the exercise, until an image representing the user as he could be at the end of the duration of the exercise is obtained, in other words an image of the user rested and relaxed in a state of calm alertness. The image can be modified according to the physiological state 11 deduced from at least one of the measurements of physiological signs. The modified image 16 can also be a representation of the user, in particular via an avatar, and therefore of his state, during the exercise.

[0098] The display device 8 is then arranged to display the image which changes (displayed modified image 19) during the exercise in a progressive manner. The user will then see himself doing the exercise and will see the evolution of his physiological state towards a target physiological state of calm alertness.

[0099] The display device 8 is for example arranged to display the image 12 recorded by the camera 2 before the start of the exercise (recorded image displayed 18), then the artificially modified image 16 during the exercise (modified image displayed 19), then again the image 12 recorded by the camera at the end of the exercise (recorded image displayed 18). Thus, the user sees himself as he is before the exercise, he can see a representation of the evolution of his state during the exercise, and see himself as he is after the exercise to see the effect that the exercise had on him.

[0100] The display of the modified image during the exercise is an example of information to help with the completion of an exercise: by seeing himself doing the exercise, the user will be in a better position to carry it out.

[0101] The display device 8 is arranged to display the recorded or modified image of the user on a screen or in space, in particular in the form of a hologram.

[0102] The display device 8 can be arranged to simultaneously display the recorded image 18 or the modified image 19 and information to assist in carrying out the exercise 15. The information to assist in carrying out the exercise can be a representation of a part of the user's body, in particular a representation of his lungs, during the carrying out of the exercise, a representation of the air circulating in his airways during the carrying out of the exercise for example in the form of a ball which rises and falls in his trachea, a representation of the circulation of his blood leaving the heart and going to irrigate his muscles, a representation of the stages of carrying out the exercise.The information to assist in carrying out the exercise may also be the image modified 19 by the control unit which allows the user to see a representation of himself carrying out the exercise and to visualize the effects that the exercise may have on him.

[0103] By visualizing a representation of himself performing the exercise, the user can thus perform the exercise more efficiently. Indeed, the invention uses the principle of mirror neurons, which allow neurons to activate when the individual does or sees an action, in this case, the breathing exercise, and the activation of these neurons aims to improve learning and therefore the efficiency of the exercise. Thus, by seeing himself doing the exercise, and by seeing an artificially modified image of himself according to which the exercise works well, the user will see his physiological state improve more quickly.

[0104] The control unit 2 is arranged to calculate: - A state change score based on the measurement provided by said at least one sensor throughout the exercise, or at the start and end of the exercise, - An exercise performance score.

[0105] The display device is arranged to display the state change score and the exercise performance score.

[0106] [Fig.3] is a representation of a tachogram of a user in a state of stress 3B, and when he is in cardiac coherence, for example in a state of calm vigilance 3A. As this can be observed, the heart rate of the user in a state of stress is chaotic, whereas at the end of the exercise the heart rate is regular. The display of this measurement by the display device throughout the exercise allows the user to visualize their change of state.

Claims

Claims

1. Interactive system (1) with at least one user occupying a vehicle, in particular a car, said system comprising: - At least one sensor (7) arranged to provide a measurement of at least one physiological sign (10), in particular a heart rate and / or a respiratory rate relating to the user, - At least one camera (2) arranged to record at least one image (12) of the user, - A control unit (3) configured to, from the measurement of said physiological sign (10), deduce at least one physiological state (11) of the user, - A display device (8) arranged to display the recorded image (17) and information to assist in carrying out an exercise (15, 19).

2. Interactive system (1) according to claim 1, characterized in that the display device (8) is arranged to display the measurement of the at least one physiological sign (17), for example a heart rate or respiratory rate.

3. Interactive system (1) according to claim 1 or 2, characterized in that it is arranged to offer an exercise to the user, in particular a breathing exercise and more precisely a cardiac coherence exercise, according to his deduced physiological state until he reaches a target physiological state.

4. Interactive system (1) according to the preceding claim, characterized in that the control unit (3) is arranged to compare the measurement of the physiological sign (10) provided by the sensor (7) with a representative data item (20) of the target physiological state (13) to be achieved, in particular a state of calm alertness, and to suggest to the user to perform an exercise according to the result of this comparison.

5. Interactive system (1) according to one of claims 3 or 4, characterized in that the control unit (3) is arranged to check whether the user reaches the target physiological state (13), in particular by checking that the respiratory rate is between 0.06 and 0.12 Hertz, preferably is approximately 0.1 Hertz and / or that the heart rate is correlated with respiratory rate.

6. Interactive system (1) according to one of the preceding claims, characterized in that the control unit (3) is arranged to modify the recorded image (12) progressively, in particular as a function of the physiological state deduced (11) by the control unit (3), throughout the exercise to obtain a modified image (16) progressively throughout the exercise.

7. Interactive system (1) according to one of the preceding claims, characterized in that the display device (8) is arranged to display the image recorded (18) by the camera before the start of the exercise, then the artificially modified image (19) during the exercise, then again the image recorded (18) by the camera at the end of the exercise.

8. Interactive system (1) according to one of the preceding claims, characterized in that the control unit (3) is arranged to calculate a state change score and an exercise performance score, and the display device (8) is arranged to display said scores.

9. Vehicle (100), in particular a motor vehicle, comprising the system (1) according to one of the preceding claims.

10. Driving assistance method enabling a user to reach a target physiological state comprising the following steps: - measurement of at least one physiological sign relating to the user by a sensor, - recording of an image of the user by a camera, - deduction of a physiological state from the measurement of the physiological sign by a control unit, - display of the recorded image and information to assist in carrying out an exercise by a display device.

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