JP2015019857A - Sleep state control device, and sleep state control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve comfort of an occupant related to sleep when moving.SOLUTION: A sleep state control device mounted on a vehicle for carrying and moving a person, includes: a hypnotic stimulation part 16 imparting hypnotic stimulation to an occupant; and an awakening stimulation part 17 imparting awakening stimulation to the occupant. The sleep state control device: sets a sleep pattern of the occupant when moving to a destination according to at least one of the destination that is a movement destination, a required time Tn to the destination, and a sleep shortage situation of the occupant; and controls the hypnotic stimulation part 16 and the awakening stimulation part 17 according to the set sleep pattern. The sleep state control device: represents a mind and body load state of the occupant in two stages of a small load state and a large load state; determines whether the mind and body load state of the occupant is the small load state or the large load state according to the destination; and sets the sleep pattern according to a determination result.

Description

  The present invention relates to a sleep state control device and a sleep state control method.

  The prior art described in Patent Document 1 detects the current driver's drowsiness level based on physiological measurements, provides guidance for nap when the drowsiness level is high, and induces stoppage to an appropriate place. is there. Further, it discloses that the sleepiness level is detected again after stopping, the sleep mode is set according to the sleepiness level, and the sleep depth is controlled by the awakening stimulus or the arousal stimulus.

Japanese Patent No. 4596023

By the way, the travel purpose, the time required to reach the destination, the condition of the driver of the day, and the like are various. Therefore, if the sleep state is simply controlled according to the driver's sleepiness without taking these factors into consideration, there is a possibility that comfort may be reduced, such as a clear awakening not being obtained.
The subject of this invention is improving the comfort of the passenger | crew regarding sleep in the case of a movement.

  A sleep state control apparatus according to an aspect of the present invention is mounted on a vehicle that carries a person and includes a wakefulness stimulating unit that provides a wakefulness stimulus to the occupant and a wakefulness stimulating unit that provides the wakefulness stimulus to the occupant. And according to at least one of the destination, the required time to the destination, and the sleep insufficiency status of the occupant, the sleep pattern of the occupant when moving to the destination is set, and the set sleep pattern In response to this, the hypnotic stimulation unit and the arousal stimulation unit are controlled.

  According to the present invention, the sleep pattern of the occupant when moving to the destination is set according to the destination as the destination, the required time to the destination, the sleep shortage situation of the occupant, and the sleep state of the occupant By controlling the occupant, comfort of the occupant regarding sleep can be improved during movement.

It is a schematic block diagram of a sleep state control apparatus. It is a block diagram which shows a sleep state control process. It is an example which shows the mind-body load state according to the destination. It is a figure which shows the autonomous cycle from which the depth of sleep changes. It is a figure explaining the calculation method of the blood pressure value P. FIG. It is a figure which shows transition of the blood pressure value. It is an example of composition which exchanges various information via a touch panel. It is a table used for the setting of a sleep pattern. It is a flowchart which shows a sleep state control process. It is a figure which shows transition of the sleep stage according to the sleep pattern.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<< First Embodiment >>
"Constitution"
In this embodiment, when the vehicle moves with a vehicle, the sleep state of the occupant is controlled to improve the comfort of the occupant. Here, the car will be described as an example, but the target is not limited to the passenger in the passenger seat or the rear seat, and if the car has an automatic driving function, the passenger in the driver's seat is also the target. To do. Moreover, it is not limited to a motor vehicle, What is necessary is just a vehicle which carries a person and moves, such as a railroad, an aircraft, a ship.

FIG. 1 is a schematic configuration diagram of a sleep state control apparatus.
The sleep state control device is mounted on, for example, an automobile, and includes a biological information detection unit 11, a user interface 12, a navigation system 13, a vehicle signal detection unit 14, a controller 15, a wakefulness stimulation unit 16, and an arousal stimulus. Part 17.
The biological information detection unit 11 includes a pulse wave sensor, an electrocardiograph, a body motion sensor, an electroencephalograph, and the like, and detects various biological information of the occupant.

  The pulse wave sensor detects an occupant's pulse wave (volume pulse wave). The pulse wave is biological information representing the volume change of the peripheral arterial blood vessels accompanying the heartbeat. This pulse wave sensor utilizes the characteristic that near-infrared wavelength light passes through a living body and is absorbed by blood hemoglobin, and is composed of a photoelectric sensor in which an infrared light emitting element and a light receiving element are combined. . Specifically, it is provided, for example, on an armrest, a headrest, etc., irradiates infrared light onto the surface of the occupant's skin, and inputs a voltage signal corresponding to the amount of reflected scattered light to the controller 15. The controller 15 determines a pulse wave from the input voltage signal.

  The electrocardiograph detects an occupant's electrocardiogram waveform. In this electrocardiograph, for example, a plurality of electrodes are provided on the seating surface and back surface of the seat, and a potential difference signal generated between the electrodes due to depolarization accompanying stimulation conduction when the occupant's myocardium expands and contracts is sent to the controller 15. input. The controller 15 determines an electrocardiogram waveform from the inputted potential difference signal. In addition, since clothing and cloth are interposed between the occupant's skin and the electrodes, it is desirable to employ the Laplacian electrode arrangement method or to increase the input impedance of the capacitive measurement circuit.

  The body motion sensor detects body motion that repeats with the breathing motion of the occupant as occupant breathing information. This body motion sensor is made of, for example, a piezoelectric element such as polyvinylidene fluoride (PVDF), and is provided, for example, between a stay that supports a buckle of a seat belt and a seat frame that supports the stay. When the seat belt is tensioned / relaxed according to the breathing motion of the occupant, the displacement of the stay relative to the seat frame is converted into a voltage signal and output to the controller 15. The controller 15 determines respiration information from the input voltage signal.

  The electroencephalograph detects the occupant's brain waveform. In this electroencephalograph, for example, a plurality of electrodes are provided on the headrest, and the electrical activity generated in the brain, that is, the action potential generated in nerve cells (neurons) and the synaptic potential when signals are transmitted between nerve cells, A potential difference signal generated between the electrodes is input to the controller 15. The controller 15 determines the brain waveform from the input potential signal. As the basic rhythm of the electroencephalogram, the controller 15 includes a δ wave indicating a rhythm of 1 to 3 Hz, a θ wave indicating a rhythm of 4 to 7 Hz, an α wave indicating a rhythm of 8 to 13 Hz, a β wave indicating a rhythm of 14 Hz or more, and the like. Observe.

The biological information detection unit 11 of the present embodiment is desirably provided on the armrest, the headrest, the seat surface and the back surface of the seat, the seat belt, etc., because it is desirable to continuously acquire the biological information without restraining the occupant. It is not limited to this. In short, since it is only necessary to obtain the biological information of the occupant, the biological information detection unit 11 may be provided at a location where the occupant operates within a range where a part of the body reaches, and further, the fingertip, wrist, earlobe It may be wearable to be worn on the occupant's body, such as the head.
The above is the description of the biological information detection unit 11.

  The user interface 12 is an interface for exchanging various types of information with passengers. Input from the occupant is performed via a switch, a keyboard, a pointing device (mouse, trackball, pen tablet, touch panel, etc.), a microphone, and the like, and output to the occupant is performed by a display, audio output, or the like. The information input by the occupant includes, for example, information related to sleep such as whether or not there is sufficient sleep, information related to a movement purpose such as whether it is an outbound trip to work, after finishing work, or private. For example, it is desirable to ask the occupant by presenting a question that can be answered with, for example, “YES” or “NO”.

  The navigation system 13 recognizes the current position of the host vehicle, road map information, the destination, and the required time to the destination. The navigation system 13 has a GPS receiver and recognizes the position (latitude, longitude, altitude) of the host vehicle and the traveling direction based on the time difference between radio waves arriving from three or more GPS satellites. The navigation system 13 has a road traffic information receiver. For example, by VICS (registered trademark), FM multiplex broadcasting, optical vehicle detector (light beacon), radio beacon, etc., traffic regulation information, traffic fault information Receive road traffic information such as traffic jam information and travel time information. Then, the road map information stored in the DVD-ROM drive or hard disk drive is referenced to recognize the road map information at the current position of the host vehicle. Further, the destination input by the occupant is recognized, and the required time to the destination is recognized based on the road traffic information. In addition, you may acquire from the schedule information memorize | stored in not only what a passenger | crew inputs a destination but a passenger | crew's portable information terminal.

The vehicle signal detection unit 14 includes a vehicle speed sensor, an acceleration sensor, a lateral acceleration sensor, and the like, and detects various vehicle signals.
The vehicle speed sensor detects a vehicle body speed (hereinafter referred to as a vehicle speed) V. This vehicle speed sensor is provided, for example, in a driven gear on the output side of the transmission, detects the magnetic lines of force of the sensor rotor by a detection circuit, converts the change in the magnetic field accompanying the rotation of the sensor rotor into a pulse signal, and inputs it to the controller 15. . The controller 15 determines the vehicle speed V from the input pulse signal.

  The acceleration sensor detects an acceleration / deceleration G in the vehicle longitudinal direction. This acceleration sensor detects, for example, the displacement of the movable electrode relative to the fixed electrode as a change in capacitance, and converts it into a voltage signal proportional to the acceleration / deceleration and inputs it to the controller 15. The controller 15 determines the acceleration / deceleration G from the input voltage signal. The controller 15 processes acceleration as a positive value and processes deceleration as a negative value.

The lateral acceleration sensor detects the lateral acceleration of the vehicle. This lateral acceleration sensor detects, for example, the displacement of the movable electrode with respect to the fixed electrode as a change in capacitance, and converts it into a voltage signal proportional to the lateral acceleration and outputs it to the controller 15. The controller 15 determines the lateral acceleration from the input voltage signal. The controller 15 processes the right turn as a positive value and the left turn as a negative value.
In addition, although the controller 15 inputs each detection signal directly from sensors, it is not limited to this. The controller 15 may be connected to another control unit to receive various data via, for example, CSMA / CA multiplex communication (CAN: Controller Area Network).
The above is the description of the vehicle signal detection unit 14.

The controller 15 is composed of, for example, a microcomputer, and executes sleep state control processing every predetermined time (for example, 10 msec), and drives and controls the wakefulness stimulating unit 16 and the wakefulness stimulating unit 17.
The wakefulness stimulating unit 16 gives the occupant a stimulus that increases parasympathetic nerves by light, color, temperature, scent, pressurization, shaking, and the like.
For light, the lighting is dimmed, the dimming glass is switched from transparent to opaque, and the curtains and blinds are closed (light shielding). About color, it switches to the light color suitable for sleep by illumination. Regarding the temperature, the air conditioning is adjusted so that the room temperature is suitable for sleep, or the seat heater is operated. In addition, about temperature, it is more effective when a passenger | crew's especially deletion part is warmed. About fragrance, we diffuse fragrance with relaxation effect with aroma diffuser. For pressurization, a relaxing massage is performed with a roller built in the seat. For shaking, the seat is swung to produce a comfortable shaking like a rocking chair or cradle. In addition, about pressurization and a shake, it is effective when it matches with a passenger | crew's heartbeat and respiration especially.

The awakening stimulation unit 17 gives the occupant a stimulus that enhances the sympathetic nerve by light, color, temperature, scent, posture, vibration, and the like.
For light, the lighting is brightened, the light control glass is switched from opaque to transparent, and curtains and blinds are opened (lighting). The color is switched to a light color suitable for awakening by illumination. As for the temperature, the air conditioning is adjusted and ventilation is performed so that the room temperature is suitable for awakening. In terms of temperature, it is more effective to cool the occupant, particularly the erasure part. About fragrance, we diffuse fragrance suitable for awakening with aroma diffuser. Regarding the posture, the seat position is adjusted so that the posture is suitable for awakening, such as raising the occupant's upper body. As for vibration, vibration suitable for waking is generated by a vibrator or the like built in the seat. For vibration, it is particularly effective to control the jerk (jerk).

Next, the sleep state control process executed by the controller 15 will be described.
FIG. 2 is a block diagram showing sleep state control processing.
The sleep state control process executed by the controller 15 includes a mind / body load state determination unit 21, a time determination unit 22, a sleep insufficiency state determination unit 23, a sleep pattern setting unit 24, a sleep pattern presentation unit 25, and a sleep pattern determination. Unit 26 and sleep state control unit 27.
The psychosomatic load state determination unit 21 represents the occupant's psychosomatic load state in two stages, a low load state and a high load state, and according to the destination acquired from the navigation system 13, the occupant's psychosomatic load state is a low load state. Determine whether there is a heavy load.

FIG. 3 is an example showing a mental and physical load state according to the destination.
First, when the destination is a public destination such as a business place or a business trip destination, it is determined that the mental and physical load state is a heavy load state. On the other hand, when the destination is a private destination such as home, accommodation, home, friend's house, hotel, hot spring, beauty treatment salon, other resorts, entertainment facilities, etc., it is determined that the mental and physical load state is a light load state. To do.
Here, the mind-body load state is simply determined according to the destination, but the mind-body load state may be determined in consideration of the estimated arrival time zone. For example, even if the destination is a friend's house, if the estimated arrival time zone is daytime, it is determined that the psychosomatic load state is a heavy load state, and if the estimated arrival time zone is nighttime, the psychosomatic load state is reduced. You may make it judge that it is a load state.

Also, if the destination is not set in the database or if it is not possible to determine whether the destination is a public destination or a private destination, the psychosomatic load state is temporarily determined to be a heavy load state and processed. You may proceed.
The time determination unit 22 presets a comparison time Tc (for example, about 90 minutes) corresponding to one cycle of an autonomous cycle in which the depth of sleep changes, and the required time to the destination acquired from the navigation system 13 It is determined whether Tn is shorter or longer than the comparison time Tc.

FIG. 4 is a diagram showing an autonomous cycle in which the depth of sleep changes.
The depth of sleep is generally represented by a first stage, a second stage, a third stage, and a fourth stage. First, the first stage is called a stagnation period or a sleep period, and is a state of depression. Characteristic waveforms include a decrease in α waves and the appearance of a cranial sharp wave. The second stage is a state in which a light sleep is made, and a sleep spindle wave and a K composite wave appear as characteristic waveforms. The third stage is a deep sleep state that cannot be perceived without a certain degree of stimulation, and δ waves account for 20 to 50% as a characteristic waveform. The fourth stage is the deepest sleep state, and the δ wave occupies 50% or more as a characteristic waveform. Here, the depth of sleep is roughly classified, and the first stage and the second stage are set as the shallow sleep stage, and the third stage and the fourth stage are set as the deep sleep stage.

Generally, the sleep depth periodically shifts from the first stage to the fourth stage, from the fourth stage to the first stage, and from the first stage to the fourth stage. At this time, one cycle until the depth of sleep increases from the first stage to the fourth stage and then decreases from the fourth stage to the first stage is generally known as about 90 minutes. Moreover, when it is forcibly awakened from the state in the deep sleep stage (deep sleep state), it cannot be awakened clearly and becomes a sleepy state. Moreover, even if it is a nap, if it takes 30 minutes or more, it is known that a nap effect will fall.
Therefore, by determining whether the required time Tn to the destination is shorter or longer than the comparison time Tc, the occupant's sleep depth reaches the deep sleep stage before reaching the destination, and Judge whether there is enough time to return to the light sleep stage.

The sleep insufficiency situation determination unit 23 inputs, as the passenger's sleep insufficiency situation, whether or not the occupant is in a sleep insufficiency situation via the biometric information detected by the biometric information detection unit 11 and the user interface 12. Judgment is made according to at least one of sleep deprivation situations.
First, when determining according to the biological information detected by the biological information detection unit 11, for example, the blood pressure value P is calculated based on the pulse wave detected by the pulse wave sensor and the electrocardiographic waveform detected by the electrocardiographic sensor, In accordance with the blood pressure value P, it is determined whether or not the occupant is in a sleep-deficient situation.

Here, calculation of the blood pressure value P will be described.
In the present embodiment, the fact that there is a negative correlation between the pulse wave propagation time Tp until the pulse propagates from the heart to the extinction and the blood pressure value P is utilized, and the blood pressure value P is calculated from the pulse wave propagation time Tp. The value P is calculated.
FIG. 5 is a diagram illustrating a method for calculating the blood pressure value P.
(A) in the figure shows the pulse wave propagation time Tp according to the pulse wave and the electrocardiogram waveform, and (b) shows the blood pressure value P according to the pulse wave propagation time Tp. In FIG. 4A, a time point t1 indicating the peak value of the electrocardiogram waveform is a cardiac output time point, and a time point t2 indicating the peak value of the pulse wave is a time point when the pulse wave reaches the fingertip. The difference (t2−t1) between the peak time t2 of the pulse wave and the peak time t1 of the electrocardiographic waveform is the pulse wave propagation time Tp. And as shown in (b) in the figure, there is a relationship of P = α × Tp + β between the pulse wave propagation time Tp and the blood pressure value P. According to this relational expression, the blood pressure value P is calculated according to the pulse wave propagation time Tp.

There is a correlation between the blood pressure value P and lack of sleep.
FIG. 6 is a diagram showing the transition of the blood pressure value P. As shown in FIG.
The solid line in the figure indicates the blood pressure value in a state where there is insufficient sleep, and the dotted line indicates the blood pressure value in a normal state where there is not insufficient sleep. Generally, when blood pressure values in the early morning are compared, blood pressure values tend to be higher when sleep is insufficient than when blood pressure is not insufficient. Therefore, by referring to the early morning blood pressure value of the occupant for the day and the early morning blood pressure value at the normal time without lack of sleep, it is determined whether the early morning blood pressure value of the day is higher than the normal blood pressure value. , It is determined whether the occupant is in a sleep-deficient situation. The blood pressure value in the early morning of the day and the blood pressure value in the early morning at the normal time without lack of sleep are obtained from, for example, the history information of the blood pressure value stored in the portable terminal of the passenger. If the departure time when moving toward the destination is early morning, the blood pressure value at that time may be calculated based on the pulse wave or the electrocardiogram waveform as described above.
Further, when the occupant inputs himself / herself via the user interface 12, for example, the occupant is asked whether the sleep is insufficient, or the occupant is asked about the sleep time last night to determine the sleep insufficiency state of the occupant. .

FIG. 7 is a configuration example in which various types of information are exchanged via the touch panel.
For example, a touch panel including a liquid crystal display and an operation input unit is provided in the vicinity of the dashboard so that the driver can visually recognize and operate the driver. (A) in the figure is a configuration example in which a question asking whether or not sleep is insufficient is presented so that the occupant can reply “YES” or “NO” by a touch operation. (B) in the figure is a configuration example in which a question asking about today's sleep time is presented and the occupant can respond to the sleep time by a touch operation via a pull-down menu or a numeric keypad.
The above is the description of the sleep shortage situation determination unit 23.

The sleep pattern setting unit 24 converts the sleep pattern of the occupant into the nap mode, the deep sleep mode, and the sleep shortage according to at least one of the occupant's mind-body load state, the time required to reach the destination, and the occupant's sleep shortage state. Set to one of the modes.
Here, the nap mode, the deep sleep mode, and the sleep shortage elimination mode will be described.
The nap mode is a sleep mode in which the sleep of the occupant after falling asleep is suppressed in the shallow sleep stage, and the occupant is awakened from the shallow sleep stage a predetermined time Tb (for example, about several minutes) before arriving at the destination. It is a pattern. That is, it is a sleep pattern that allows the occupant to wake up clearly immediately before arriving at the destination by suppressing the sleep depth from shifting to the deep sleep stage.

  The deep sleep mode refers to the period of sleep until the passenger arrives at the destination. This is a sleep pattern that awakens the occupant from the shallow sleep stage when the stage shifts to the shallow sleep stage. In other words, when the depth of sleep reaches at least one deep sleep stage, and then wakes up the passenger when it shifts to the shallow sleep stage, the passenger wakes up clearly before arriving at the destination. It is a sleep pattern that allows you to

  Sleep deficiency elimination mode refers to the occupant's sleep after going to sleep in an autonomous cycle that alternates between the light sleep and deep sleep phases, and arrives at the destination for a predetermined period before arriving at the destination. After that, when the autonomous cycle first shifts from the deep sleep stage to the shallow sleep stage, the sleep pattern wakes up the occupant from the shallow sleep stage. That is, priority is given to eliminating the sleep shortage of the occupant as much as possible, but it is desirable to avoid forcibly awakening the occupant from the deep sleep stage. Therefore, if it is possible to shift from the deep sleep stage to the shallow sleep stage before arriving at the destination, it is desirable to wake up the occupant at that time, but from the deep sleep stage to the shallow sleep stage before arriving at the destination When it is not possible to shift, the occupant is allowed to sleep even after arriving at the purpose, and when the sleep of the occupant shifts to a shallow sleep stage in an autonomous cycle, the sleep pattern awakens the occupant.

Next, depending on at least one of the occupant's mental and physical load status, the time required to reach the destination, and the sleep deprivation situation of the occupant, the sleep pattern of the occupant is any of the nap mode, the deep sleep mode, and the sleep deprivation mode A method of setting one will be described.
FIG. 8 is a table used for setting a sleep pattern.
First, when the occupant determines that the sleep is not insufficient, the sleep pattern is set to the nap mode.
Moreover, when it is determined that the occupant is in a sleep shortage state and the occupant's mind-body load state is a low load state, the sleep pattern is set to the sleep shortage elimination mode.
Further, when it is determined that the occupant is in a sleep-deficient state, the occupant's psychosomatic load state is a heavy load state, and the required time Tn to the destination is longer than the comparison time Tc, the sleep pattern is set to the deep sleep mode. .

Further, when it is determined that the occupant is in an insufficient sleep state, the occupant's physical and mental load state is a heavy load state, and the required time Tn to the destination is shorter than the comparison time Tc, the sleep pattern is set to the nap mode. .
The above is the description of the sleep pattern setting unit 24.
The sleep pattern presentation unit 25 presents the sleep pattern set by the sleep pattern setting unit 24 to the occupant via the user interface 12. For example, a question asking whether the sleep pattern may be set to the nap mode is presented so that the occupant can respond with “YES” or “N0”.

The sleep pattern determination unit 26 asks the occupant himself to determine which mode is to be finally set as the sleep pattern among the nap mode, the deep sleep mode, and the sleep shortage elimination mode. For example, the sleep pattern set by the sleep pattern setting unit 24 is asked, and the occupant responds with “YES” or “N0”. When the passenger's response is “YES”, the sleep pattern set by the sleep pattern setting unit 24 is finally determined. On the other hand, when the response of the occupant is “NO”, a sleep pattern other than the sleep pattern set by the sleep pattern setting unit 24 is presented as a new candidate, which one is selected and the sleep pattern selected by the occupant is determined. Final decision.
The sleep state control unit 27 gives the occupant sleep state or wakefulness stimulus to the occupant via the wakefulness stimulating unit 16 and the wakefulness stimulating unit 17 according to the sleep pattern determined by the sleep pattern determining unit 26, thereby changing the sleep state of the occupant. Control.
The above is an explanation of the block diagram showing the sleep state control process.

FIG. 9 is a flowchart showing the sleep state control process.
First, in step S101, it is determined whether the occupant's mind-body load state is a small load state or a large load state by the processing of the mind-body load state determination unit 21.
In the subsequent step S102, it is determined by the processing of the time determination unit 22 whether the required time Tn to the destination is shorter or longer than the comparison time Tc.
In continuing step S103, it is judged by the process of the sleep shortage condition judgment part 23 whether a passenger | crew is in a sleep shortage situation.

In the subsequent step S104, the sleep pattern setting unit 24 processes the sleep pattern of the occupant into the nap mode, the deep sleep mode, Set to any one of sleep deficiency elimination mode.
In continuing step S105, the sleep pattern set in the sleep pattern setting part 24 is shown to a passenger | crew by the process of the sleep pattern presentation part 24. FIG.
In continuing step S106, it is determined by the process of the sleep pattern determination part 26 whether the passenger | crew accepted the sleep pattern shown by the sleep pattern presentation part 24. FIG. Here, when the occupant approves, the presented sleep pattern is determined as the final sleep pattern, and the process proceeds to step S107. On the other hand, when the passenger does not approve, the process proceeds to step S108 in order to reset the presented sleep pattern.

In step S107, by the process of the sleep state control unit 27, according to the sleep pattern determined by the sleep pattern determination unit 26, by giving the occupant a wakefulness stimulus or wakefulness stimulus through the wakefulness stimulus unit 16 and the wakefulness stimulus unit 17. After the sleep state of the occupant is controlled, the process returns to the predetermined main program.
In step S108, the sleep pattern is reset by entrusting the occupant to selection, and the sleep pattern is determined as the final sleep pattern, and the process proceeds to step S107.
The above is description of the flowchart which shows a sleep state control process.

<Action>
Next, the operation of the first embodiment will be described.
The travel purpose, the time required to reach the destination, and the condition of the driver for the day vary. Therefore, if the sleep state is simply controlled according to the driver's sleepiness without taking these factors into consideration, there is a possibility that comfort may be reduced, such as a clear awakening not being obtained.
Therefore, it is determined whether the occupant's mind-body load state is a light load state or a heavy load state (step S101), and it is determined whether the required time Tn to the destination is shorter or longer than the comparison time Tc ( Step S102), it is determined whether or not the occupant is in a sleep shortage situation (Step S103). The sleep pattern of the occupant is set to any one of the nap mode, the deep sleep mode, and the sleep shortage elimination mode according to the occupant's state of mind and body load, the time required to reach the destination, and the occupant's sleep shortage situation. (Step S104).

  Then, the sleep pattern set by the sleep pattern setting unit 24 is presented to the occupant (step S105), whether or not the occupant accepts the sleep pattern (step S106), and when the occupant approves (step S106). The determination in S106 is “Yes”), and the presented sleep pattern is determined as the final sleep pattern. On the other hand, when the occupant does not approve (the determination in step S106 is “No”), the sleep pattern is re-set by entrusting the occupant to be selected, and is determined as the final sleep pattern (step S108).

Then, according to the finally determined sleep pattern, the sleep state of the occupant is controlled by giving the occupant a wakefulness or arousal stimulus via the wakefulness stimulating unit 16 and the wakefulness stimulating unit 17 (step S107).
In this way, the sleep pattern of the occupant when moving to the destination is set according to the destination, the required time to the destination, the sleep shortage situation of the occupant, and the sleep state of the occupant is controlled By doing so, the comfort of the occupant regarding sleep during movement can be improved.

FIG. 10 is a diagram illustrating the transition of the sleep stage according to the sleep pattern.
(A) in the figure shows a nap mode of about 30 minutes.
In this sleep pattern, the sleep of the occupant after falling asleep is suppressed at the shallow sleep stage, and the occupant is awakened from the shallow sleep stage a predetermined time Tb (for example, about several minutes) before reaching the destination. In this way, by suppressing the sleep depth from shifting to the deep sleep stage, the occupant can be awakened cleanly just before arriving at the destination.

(B) in the figure shows a deep sleep mode of about 2 hours.
In this sleep pattern, the sleep of the occupant after falling asleep is left to an autonomous cycle in which the depth of sleep changes periodically, and the autonomous cycle ends in the deep sleep stage until the arrival at the destination. The passenger is awakened from the light sleep stage when shifting from the light sleep stage to the light sleep stage. In this way, when the depth of sleep reaches the deep sleep stage and then shifts to the shallow sleep stage, it is possible to awaken the occupant clearly before arriving at the destination by awakening the occupant it can.

(C) in the figure shows a sleep shortage elimination mode of about 2 hours.
In this sleep pattern, the sleep of the occupant after falling asleep is left to an autonomous cycle in which the depth of sleep changes periodically, after a predetermined period before arriving at the destination, and after arriving at the destination When the autonomous cycle first transitions from the deep sleep phase to the light sleep phase, the passenger is awakened from the light sleep phase. Here, it shows the case where it is not possible to shift from the deep sleep stage to the shallow sleep stage before arriving at the destination. When entering the sleep stage, the passenger is awakened. In this way, priority is given to eliminating the sleep shortage of the occupant as much as possible, but since the occupant is not forcibly awakened from the deep sleep stage, the occupant can be awakened clearly.

《Application example》
In this embodiment, the sleep pattern of the occupant when moving to the destination is set according to the destination that is the destination, the required time to the destination, the sleep insufficiency situation of the occupant, etc. Alternatively, the sleep pattern of the passenger may be set in consideration of the estimated arrival time at the destination. For example, if the expected arrival time at the destination is at night, but you fall asleep in the meantime, you may not be able to sleep at night. Therefore, when the estimated arrival time at the destination is in a predetermined time zone including sunset, the sleep pattern is set to the nap mode. As a result, a situation in which the passenger cannot sleep at night can be avoided, and the comfort can be prevented from being lowered.

<Modification>
In this embodiment, the sleep pattern of the occupant when moving to the destination is set according to the destination that is the destination, the required time to the destination, and the sleep shortage situation of the occupant. It is not limited to this. In other words, the sleep pattern of the occupant when moving to the destination may be set according to at least one of the destination that is the destination, the required time to the destination, and the sleep shortage state of the occupant.

《Correspondence relationship》
As described above, the wakefulness stimulating part 16 corresponds to the “wakefulness stimulating part”, and the wakefulness stimulating part 17 corresponds to the “wakefulness stimulating part”. In addition, the mental and physical load state determination unit 21, the time determination unit 22, the sleep shortage situation determination unit 23, the sleep pattern setting unit 24, and the processes of steps S101 to S104 correspond to the “sleep pattern setting unit”. Further, the sleep state control unit 27 and the process of step S107 correspond to a “sleep state control unit”. In addition, the biological information detection unit 11 corresponds to the “biological information detection unit”, the user interface 12 corresponds to the “information input unit”, and the sleep pattern determination unit 26 and the processes in steps S106 and S108 are performed as “sleep pattern determination unit”. ".

"effect"
Next, the effect of the main part in 1st Embodiment is described.
(1) The sleep state control device according to the present embodiment is mounted on a vehicle that carries a person, and includes a wakefulness stimulating unit 16 that provides a wakefulness stimulus to the occupant and an awakening stimulating unit that provides the wakefulness stimulus to the occupant. 17. Then, the sleep pattern of the occupant when moving to the destination is set according to at least one of the destination that is the destination, the required time Tn to the destination, and the sleep shortage state of the occupant, and the set sleep The wakefulness stimulation unit 16 and the wakefulness stimulation unit 17 are controlled according to the pattern.
In this way, the sleep pattern of the occupant when moving to the destination is set according to the destination, the required time to the destination, the sleep shortage situation of the occupant, and the sleep state of the occupant is controlled By doing so, the comfort of the occupant regarding sleep during movement can be improved.

(2) The sleep state control device according to the present embodiment represents the occupant's psychosomatic load state in two stages, a low load state and a high load state, and the occupant's psychosomatic load state is a low load state according to the destination. Or a heavy load state, and a sleep pattern is set according to the determination result.
Thus, by determining the occupant's mind-body load state and setting the sleep pattern, a sleep pattern suitable for the occupant's mind-body load state can be set, and the comfort of the occupant is improved.

(3) The sleep state control device according to the present embodiment presets a comparison time Tc corresponding to one cycle of an autonomous cycle in which the sleep depth changes, and the required time Tn to the destination is the comparison time. Whether it is shorter or longer than Tc is determined, and a sleep pattern is set according to the determination result.
Thus, by determining the required time Tn to the destination and setting the sleep pattern, a sleep pattern suitable for the travel time to the destination can be set, and passenger comfort is improved.

(4) The sleep state control device according to the present embodiment includes the biological information detection unit 11 that detects the occupant's biological information, and determines whether the occupant is in a sleep shortage state as the occupant's sleep shortage state. The determination is made according to the biological information detected by the detection unit 11, and the sleep pattern is set according to the determination result.
Thus, by determining a sleep shortage situation from the occupant's biological information and setting the sleep pattern, a sleep pattern suitable for the driver's condition on the day can be set, and passenger comfort is improved.

(5) The sleep state control device according to the present embodiment is configured so that the occupant can input the sleep shortage situation, determines the sleep shortage situation according to the occupant's input as to whether or not the sleep shortage situation, and the determination result Set sleep pattern according to
Thus, by determining the sleep shortage situation from the passenger's self-report and setting the sleep pattern, a sleep pattern suitable for the driver's condition of the day can be set, and passenger comfort is improved.

(6) The sleep state control device according to the present embodiment represents the depth of sleep in two stages, a shallow sleep stage and a deep sleep stage, and suppresses sleep of the occupant after falling asleep at the shallow sleep stage. A sleep pattern that wakes up an occupant from a shallow sleep stage only a predetermined time before arriving at is defined as a nap mode. In addition, the sleep of the occupant after going to sleep is entrusted to an autonomous cycle that alternates between the shallow sleep phase and the deep sleep phase, and the autonomous cycle lasts from the deep sleep phase until the arrival at the destination. The sleep pattern that wakes up the occupant from the shallow sleep stage when the sleep stage is entered is defined as a deep sleep mode. In addition, the occupant's sleep after going to sleep is entrusted to an autonomous cycle that alternates between a shallow sleep stage and a deep sleep stage, and after the arrival at the destination, the autonomous When a typical cycle first shifts from the deep sleep phase to the shallow sleep phase, a sleep pattern that wakes the occupant from the shallow sleep phase is defined as a sleep shortage elimination mode. Then, the sleep pattern of the occupant is set to any one of the nap mode, the deep sleep mode, and the sleep shortage elimination mode.
In this way, by considering the autonomous cycle in which the depth of sleep changes periodically, the sleep pattern of the occupant can be set, so that the optimal sleep pattern can be set and the comfort of the occupant is improved .

(7) The sleep state control device according to the present embodiment sets the sleep pattern to the nap mode when the occupant is not in a sleep shortage situation.
As described above, when the sleep is not insufficient, by setting the nap mode, the occupant can be awakened before arrival and the comfort of the occupant is improved.

(8) When the sleep state control device according to the present embodiment determines that the occupant is in a sleep shortage state and the occupant's mind-body load state is a light load state, the sleep pattern is set to the sleep shortage elimination mode.
In this way, when there is a lack of sleep and the mental and physical load is small, the sleep shortage of the occupant can be resolved even a little by setting it to the sleep shortage elimination mode, and the occupant is forced from the deep sleep stage. Since it does not wake up, the passenger can be awakened clearly.

(9) In the sleep state control device according to the present embodiment, when the occupant is in a sleep-deficient state, the occupant's psychosomatic load state is a heavy load state, and the required time Tn to the destination is longer than the comparison time Tc. When judged, the sleep pattern is set to the deep sleep mode.
In this way, when there is a lack of sleep, the physical and mental load is large, and there is a sufficient margin for the required time Tn to the destination, the sleep deprivation of the occupant can be resolved even a little by setting the sleep mode. Since the occupant is not forcibly awakened from the deep sleep stage, the occupant can be awakened clearly. Moreover, since the passengers are awakened by the time they arrive, there will be no hindrance to the activities after arrival.

(10) In the sleep state control device according to the present embodiment, when the occupant is in a sleep shortage state, the occupant's mind-body load state is a heavy load state, and the required time Tn to the destination is shorter than the comparison time Tc. When it is determined, the sleep pattern is set to the nap mode.
As described above, when there is a lack of sleep, the physical and mental load is large, and there is not enough time for the required time Tn to reach the destination, the passenger can be awakened clearly by setting the nap mode. Moreover, since the passengers are awakened by the time they arrive, there will be no hindrance to the activities after arrival.

(11) The sleep state control device according to the present embodiment sets the sleep pattern to the nap mode when the estimated arrival time at the destination is in a predetermined time zone including sunset.
Thus, when the arrival time at the destination is a time zone close to sunset, setting the nap mode avoids a situation in which the occupant cannot sleep at night and prevents the comfort from deteriorating.

(12) The sleep state control device according to the present embodiment is configured so that the occupant can determine the sleep pattern, and the sleep pattern determined by the occupant is finally determined.
Thus, since a passenger | crew finally determines a sleep pattern, the sleep pattern according to the passenger | crew's request | requirement can be set and a passenger | crew's comfort improves.

(13) The sleep state control method according to the present embodiment is based on at least one of a destination that is a destination, a required time Tn to the destination, and an occupant's sleep insufficiency when traveling on a vehicle. The sleep pattern of the occupant when moving to the destination is set. And according to a sleep pattern, a passenger | crew's sleep state is controlled by giving an occupant's arousal stimulus or arousal stimulus.
In this way, the sleep pattern of the occupant when moving to the destination is set according to the destination, the required time to the destination, the sleep shortage situation of the occupant, and the sleep state of the occupant is controlled By doing so, the comfort of the occupant regarding sleep during movement can be improved.
Although the present invention has been described with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications of the embodiments based on the above disclosure are obvious to those skilled in the art.

DESCRIPTION OF SYMBOLS 11 Biometric information detection part 12 User interface 13 Navigation system 14 Vehicle signal detection part 15 Controller 16 Arousal stimulation part 17 Arousal stimulation part 21 Psychosomatic state determination part 22 Time judgment part 23 Sleep deficiency situation judgment part 24 Sleep pattern setting part 25 Sleep pattern Presentation unit 26 Sleep pattern determination unit 27 Sleep state control unit

Claims (13)

It is a sleep state control device mounted on a vehicle that carries a person,
A wakefulness stimulating part that gives the occupant a wakefulness,
An awakening stimulation unit that gives awakening stimulation to an occupant;
A sleep pattern setting unit for setting a sleep pattern of an occupant when moving to the destination according to at least one of a destination that is a destination, a required time to the destination, and a sleep shortage situation of the occupant; ,
A sleep state control device comprising: a sleep state control unit that controls the sleep-stimulating stimulation unit and the arousal stimulation unit according to a sleep pattern set by the sleep pattern setting unit. The sleep pattern setting unit
Expresses the occupant's state of mind and body load in two stages, a light load state and a heavy load state,
2. The sleep pattern is set according to a determination result according to whether the occupant's psychosomatic load state is a low load state or a high load state according to the destination. Sleep state control device. The sleep pattern setting unit
Set in advance a comparison time corresponding to one cycle of an autonomous cycle where the depth of sleep changes,
The sleep state control apparatus according to claim 1, wherein it is determined whether a time required to reach the destination is shorter or longer than the comparison time, and the sleep pattern is set according to the determination result. A biological information detection unit for detecting the biological information of the passenger,
The sleep pattern setting unit
Whether the occupant is in a sleep deficiency situation or not is determined according to the biometric information detected by the biometric information detection unit, and the sleep pattern is set according to the determination result. The sleep state control device according to any one of claims 1 to 3. An information input unit that allows passengers to input sleep shortage status,
The sleep pattern setting unit
The sleep state of the occupant is determined according to an input state of the information input unit as to whether or not the occupant is in a sleep shortage state, and the sleep pattern is set according to the determination result. The sleep state control apparatus as described in any one of 1-4. The sleep pattern setting unit
The depth of sleep is expressed in two stages, a shallow sleep stage and a deep sleep stage,
Suppressing occupant sleep after falling asleep at the shallow sleep stage, and defining a sleep pattern that wakes the occupant from the shallow sleep stage only a predetermined time before arriving at the destination as a nap mode,
The sleep of the occupant after falling asleep is left to the autonomous cycle that alternately repeats the shallow sleep phase and the deep sleep phase, and the autonomous cycle finally reaches the deep sleep in a period until the arrival at the destination. When a transition from the stage to the light sleep stage, the sleep pattern that wakes up the passenger from the light sleep stage is defined as a deep sleep mode,
The sleep of the occupant after falling asleep is left to the autonomous cycle that alternately repeats the shallow sleep stage and the deep sleep stage, and after a predetermined period before arriving at the destination and after arriving at the destination. A sleep pattern for awakening an occupant from the shallow sleep phase when the autonomous cycle first transitions from the deep sleep phase to the shallow sleep phase is defined as sleep deprivation mode,
The sleep state control device according to any one of claims 1 to 5, wherein the sleep pattern of the occupant is set to any one of the nap mode, the deep sleep mode, and the sleep shortage elimination mode. . The sleep pattern setting unit
The sleep state control apparatus according to claim 6, wherein the sleep pattern is set to the nap mode when the occupant determines that the sleep is not insufficient. The sleep pattern setting unit
The sleep pattern is set to the sleep deprivation elimination mode when it is determined that the occupant is in sleep shortage and the occupant's mind-body load state is the low load state. Sleep state control device. The sleep pattern setting unit
The sleep pattern is set to the deep sleep mode when it is determined that the occupant is in a sleep-deficient state, the occupant's psychosomatic load state is the heavy load state, and the required time to the destination is longer than the comparison time. The sleep state control device according to any one of claims 6 to 8, wherein The sleep pattern setting unit
The sleep pattern is set to the nap mode when it is determined that the occupant is in a sleep-deficient state, the occupant's psychosomatic load state is the heavy load state, and the required time to the destination is shorter than the comparison time. The sleep state control device according to any one of claims 6 to 9, wherein The sleep pattern setting unit
The sleep pattern is set to the nap mode when the estimated arrival time at the destination is in a predetermined time zone including sunset. 11. Sleep state control device. A sleep pattern determination unit that allows the passenger to determine the sleep pattern,
The sleep pattern setting unit
The sleep state control device according to any one of claims 1 to 11, wherein the sleep pattern is set according to a determination state of the sleep pattern determination unit. When traveling on a vehicle,
According to at least one of the destination that is the destination, the required time to the destination, and the sleep shortage situation of the occupant, the sleep pattern of the occupant when moving to the destination is set,
A sleep state control method characterized by controlling a sleep state of an occupant by giving a wakefulness stimulus or an arousal stimulus to the occupant according to the sleep pattern.

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