JP2016053821A - On-vehicle system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle system for determining an awake level of a driver according to a vehicle travel place, and coping with deterioration of the awake level.SOLUTION: A position determination part 12 determines whether or not, a vehicle is positioned at a predetermined attention point based on vehicle position information and map information. A threshold determination part 13 refers to a determination table 14 in which an allowable threshold of awake levels of a driver corresponding to the attention point and a point other than the attention point, and determines the allowable threshold on the vehicle position, based on the determination result of the position determination part 12. A comparison part 16 determines whether or not, the awake level of the driver becomes lower than the allowable threshold determined by the threshold determination part 13. Then, an awakening operation control part 18 executes treatment when it is determined that the awake level of the driver becomes lower than the allowable threshold by the comparison part 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an in-vehicle system that performs warning and vehicle control for an object person in accordance with the awakening level of a vehicle driver.

Conventionally, an in-vehicle system has been proposed that detects the presence or absence of a nap driving by monitoring the eyelid state, pulse, and driving operation status of the vehicle driver, and warns the driver if a nap driving is detected. (For example, see Patent Documents 1 and 2).
Further, Patent Document 3 discloses an apparatus that performs vehicle control such as vehicle speed reduction in addition to a warning to the driver in response to a decrease in the driver's arousal level.

JP 2013-200060 A JP 2011-15913 A JP 2008-210285A

In the actual driving environment, for example, when driving on a countryside road that rarely encounters pedestrians and other vehicles around the host vehicle, the caution point such as a highway, a curve, an intersection, an accident-prone point, etc. , The driver is required to drive carefully with a higher arousal level.
However, in the conventional techniques represented by Patent Documents 1 to 3, a threshold value for determining a decrease in the driver's arousal level is set regardless of the travel location of the vehicle, and driving according to the travel location of the vehicle. The awakening level of the person could not be determined.
For this reason, when the threshold of the wakefulness level is set high regardless of the travel location of the vehicle, it becomes sensitive to the decrease in the driver's wakefulness level, and when the vehicle is traveling on a single road in the countryside as described above Even so, warnings may occur frequently. On the other hand, if the threshold of the awakening level is set low regardless of the vehicle's driving location, the driver's awakening will be insensitive to the decrease in the driver's awakening level and the vehicle is driving the caution point. There is a possibility that no warning is issued even if the level drops.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an in-vehicle system that can determine a driver's arousal level according to the traveling location of the vehicle and cope with a decrease in the arousal level. .

  An in-vehicle system according to the present invention is based on a position determination unit that determines whether or not a vehicle is at a predetermined caution point based on vehicle position information and map information, and based on a determination result of the position determination unit, A threshold determination unit that determines an allowable threshold at the position of the vehicle with reference to a first determination table in which an allowable threshold of the driver's arousal level corresponding to a point other than the point and the point of caution is registered; and a threshold determination unit A comparison unit that determines whether or not the driver's arousal level is below the determined allowable threshold; and a control unit that executes a countermeasure when the comparison unit determines that the driver's arousal level is below the allowable threshold; Is provided.

  According to the present invention, there is an effect that it is possible to determine a driver's arousal level according to the travel location of the vehicle and cope with a decrease in the arousal level.

It is a block diagram which shows the structure of the vehicle-mounted system which concerns on Embodiment 1 of this invention. 6 is a diagram illustrating an example of a first determination table according to Embodiment 1. FIG. 6 is a diagram illustrating an example of a second determination table according to Embodiment 1. FIG. 3 is a flowchart showing an operation of the in-vehicle system according to the first embodiment.

Embodiment 1 FIG.
1 is a block diagram showing a configuration of an in-vehicle system according to Embodiment 1 of the present invention. In FIG. 1, an in-vehicle system 1 is a system that is mounted on a vehicle and performs warning and vehicle control according to a driver's arousal level, and includes a GPS (Global Positioning System) receiver 2, a map database (map DB) 3. The awakening level detection device 4, the surrounding situation detection device 5, the output device 6, and the vehicle control device 7 are connected.
The in-vehicle system 1 includes, as its configuration, a position information acquisition unit 10, a map information acquisition unit 11, a position determination unit 12, a threshold determination unit 13, a determination table 14, a wakefulness level acquisition unit 15, a comparison unit 16, and a surrounding situation. An acquisition unit 17, an awakening operation control unit 18, and a determination table 19 are provided.

  The GPS receiver 2 receives signals from GPS satellites via a GPS receiving antenna and detects vehicle position information. In the example of FIG. 1, the GPS receiver 2 is used as the vehicle position information detection unit. However, the vehicle position may be detected by detecting the traveling direction using a gyro sensor.

  The map DB 3 is a database in which map information including information on road information and frequent accident points is registered. The road information is information expressed by a combination of a node indicating a node on the road network expression such as an intersection and a link indicating a road section between the nodes. Further, the information related to the accident frequent occurrence point includes, for example, the position information of the accident frequent occurrence point and the road information connected to this point.

  The arousal level detection device 4 is a device that detects a driver's arousal level. For example, based on a biological signal such as a driver's brain wave, heart rate, and skin potential, an image of a driver who is driving, an image of a driving path of a vehicle, a steering angle and a lateral G of the vehicle, the driver The arousal level that quantitatively represents the arousal state is detected.

  The surrounding situation detection device 5 is a device that detects the surrounding situation of the vehicle. For example, an image sensor, an ultrasonic sensor, and a radar sensor are provided, and imaging data around the vehicle acquired by the image sensor is analyzed to detect the presence of other vehicles, two-wheeled vehicles, pedestrians, and the like around the vehicle. The ultrasonic sensor and the radar sensor detect the relative distance and speed between the obstacle around the vehicle and the vehicle.

  The output device 6 outputs various information instructed from the in-vehicle system 1. For example, a speaker 60 and a monitor 61 are provided, and a warning that prompts the driver to wake up is output by the speaker 60 and displayed on the monitor 61.

  The vehicle control device 7 is a device that performs integrated control of the vehicle. For example, in addition to controlling the operation of sounding the horn 72 of the vehicle, the operation of turning on the light 73, the operation of the engine 74, and the operation of the accelerator 75, the operation of the seat vibrator 70 provided on the driving seat and the air conditioner 71 mounted on the vehicle. To control.

  In the in-vehicle system 1, the position information acquisition unit 10 acquires the position information of the vehicle detected by the GPS receiver 2. Moreover, the map information acquisition part 11 acquires the map information corresponding to the positional information on the vehicle which the positional information acquisition part 10 acquired from map DB3.

The position determination unit 12 determines whether or not the vehicle is at a predetermined caution point based on the position information of the vehicle and map information corresponding thereto.
The attention point is predetermined as a reference point where the driver of the vehicle should drive carefully at a high awakening level. For example, points that should be alerted may be considered in terms of the shape and configuration of the road, such as at the entrance, halfway, exit, and intersection of a curve.
In addition, a highway where a vehicle travels at a high speed, a point where accidents frequently occur, and the like may be used as a caution point. Information indicating the position and type of the attention point (curve, intersection, etc.) is included in the map information.

Based on the determination result of the position determination unit 12, the threshold determination unit 13 refers to the determination table 14 in which the allowable threshold of the driver's arousal level corresponding to the attention point and a point other than the attention point is registered. Determine an acceptable threshold at the position.
That is, when the position determination unit 12 determines that the vehicle is at the caution point, the allowable threshold value corresponding to the caution point is extracted from the determination table 14 and set as the allowable threshold value at the vehicle position. If it is determined that the vehicle is located at a point other than the cautionary point, an allowable threshold value corresponding to a point other than the cautionary point is extracted from the determination table 14 and set as the allowable threshold value at the vehicle position.

As described above, the threshold value for the driver's arousal level corresponding to the caution point and points other than the caution point is registered in the determination table 14. For example, as shown in FIG. 2, a plurality of caution points 1 to n and points other than the caution points are registered. In FIG. 2, the point that the driver should drive most carefully is “attention point 1”, for example, a point where accidents frequently occur. Moreover, it becomes a point where careful driving | running | working is requested | required as it goes to the caution point 2 from the caution point n.
The attention point is set in advance as map information from information such as road shape, structure, and accident information. Note that the user may be able to set a caution point using an input device.
The points other than “attention points” are points that have not been set as the attention points, but the user may appropriately set the attention points from the points other than “attention points”.

In addition, the determination table 14 registers an allowable threshold value that is higher than a point other than the point of caution for a point of caution where the driver should encourage careful driving. For example, in FIG. 2, the allowable threshold registered in the attention point 1 is a relatively higher value than the following attention points 2,..., The attention point n, and points other than the attention point.
In this way, the more attention points that the driver should be cautiously driving, the more sensitive the driver's wakefulness level is to decrease, and when the driver's wakefulness level decreases at the cautionary point, driving immediately It is possible to execute a coping action such as a warning that prompts the person to wake up.

  Further, a plurality of allowable threshold values are registered at each point in the determination table 14 shown in FIG. Here, the “first value” of the allowable threshold is a threshold that is first compared with the driver's arousal level, and is the highest allowable threshold at each point. The “second value” is a threshold value that is compared with the driver's arousal level next to the first value, and is the next higher value than the first value. Similarly, the “third value” is a threshold value that is compared with the driver's arousal level next to the second value, and is the next highest value after the second value. Thereafter, an allowable threshold value that is gradually reduced is registered.

For example, as shown in FIG. 2, the first value of the caution point 1 that the driver should drive most carefully is a1, and the value b1 lower than this is the second value. Furthermore, the third value c1 is lower than b1. Further, at the caution point 2 to be carefully driven after the caution point 1, the value a2 lower than the first value a1 of the caution point 1 is the first value, and the value b2 lower than this is the second value and b2. Low c2 is the third value. Further, at the caution point n, the first value an, the second value bn, the third value cn... Are registered as the allowable threshold values, and the first value A (<an) is set as the allowable threshold value at points other than the caution point. , Second value B (<bn), third value C (<cn)... Are registered.
By doing in this way, the fall of a driver | operator's alertness level can be judged in steps and the content according to each judgment can be coped with.

The wakefulness level acquisition unit 15 acquires the driver's wakefulness level detected by the wakefulness level detection device 4. The driver's arousal level is sent from the arousal level acquisition unit 15 to the comparison unit 16.
The comparison unit 16 compares the driver's arousal level received from the arousal level acquisition unit 15 with the allowable threshold set by the threshold determination unit 13, and determines whether or not the driver's arousal level is below the allowable threshold. To do. The comparison result is sent from the comparison unit 16 to the awakening operation control unit 18.
The surrounding situation acquisition unit 17 acquires information indicating the surrounding situation of the vehicle detected by the surrounding situation detection device 5. Information indicating the surrounding situation of the vehicle is sent from the surrounding situation acquisition unit 17 to the awakening operation control unit 18.

The awakening operation control unit 18 is a control unit that determines and executes an action to deal with when the driver's arousal level falls below an allowable threshold. In FIG. 1, based on the determination table 19, the content of the countermeasure at the position of the vehicle is determined and executed.
The determination table 19 is a second determination table in which countermeasures to be executed when the driver's arousal level falls below an allowable threshold at points other than the caution point and the caution point are registered.

For example, in the determination table 19, as shown in FIG. 3, contents of countermeasures corresponding to the plurality of caution points 1 to n and the permissible threshold values at points other than the caution points are registered.
At caution point 1, the content of the countermeasure when the driver's arousal level falls below the first value a1 of the allowable threshold is M _a1 , the content of the countermeasure when the driver's arousal level falls below the second value b1 is M _b1 , and the third value c1. The content of the countermeasure when it falls below is _Mc1 . At caution point 2, the content of the countermeasure when the driver's arousal level falls below the first value a2 is M _a2 , the content of the countermeasure when the driver falls below the second value b2 is M _b2 , and below the third value c2. The content of the countermeasure when the error occurs is _Mc2 .
Similarly, in the attention point n, the contents of the addressed M _an, when the driver of the arousal level is below the first value _an, the contents of the deal when below a second value bn is M _bn, third value cn The content of the countermeasure when it falls below is _Mcn . At points other than the caution point, the content of the action when the driver's arousal level falls below the first value A is M _A , the content of the action when the driver falls below the second value B is M _B , and the third value C the contents of the deal when the below is a M _C.
As described above, the determination table 19 registers the contents of countermeasures to be executed when the driver's arousal level falls below each of the plurality of allowable thresholds at points other than the caution points 1 to n and the caution point. .

Moreover, the content of the countermeasure when the driver's arousal level falls below the allowable threshold value may vary from point to point. For example, as shown in FIG. 3, when the caution point 1 is an entrance of a sharp curve on a general road, the warning level of the driver is further increased to a second value after a warning for urging the driver at the caution point 1 is given. When b1 is lowered, the vehicle is controlled so that the low speed is maintained even when the accelerator 75 is depressed so that the curve ahead can be appropriately turned (the countermeasure content M _b1 ).
In this way, it is possible to determine in a stepwise manner a decrease in the driver's arousal level at each point, and it is possible to deal with the contents according to each determination.

  The position information acquisition unit 10, the map information acquisition unit 11, the position determination unit 12, the threshold determination unit 13, the wakefulness level acquisition unit 15, the comparison unit 16, the peripheral situation acquisition unit 17, and the wakefulness operation control unit 18 are, for example, When the microcomputer executes a program describing processing unique to the invention, it is realized as a specific means in which hardware and software cooperate.

  The determination tables 14 and 19 are constructed in, for example, a flash memory, a hard disk drive (HDD) device, a USB memory, or the like mounted on a computer that functions as an in-vehicle system according to the present invention. Further, the determination tables 14 and 19 may be provided in an external server device capable of acquiring data through communication with the in-vehicle system 1.

Next, the operation will be described.
FIG. 4 is a flowchart showing the operation of the in-vehicle system according to the first embodiment.
First, the position information acquisition unit 10 acquires the travel position (position information) of the vehicle from the GPS receiver 2 (step ST1). The travel position of the vehicle is sent from the position information acquisition unit 10 to the position determination unit 12. Further, the map information acquisition unit 11 acquires map information including the travel position of the vehicle from the map DB 3 and sends the map information to the position determination unit 12.

The position determination unit 12 determines whether or not the vehicle is at a predetermined caution point based on the traveling position of the vehicle and map information including the vehicle position (step ST2).
For example, it is determined whether or not the traveling position of the vehicle is a caution point based on information indicating the position and type (curve, intersection, etc.) of the caution point included in the map information.

Here, when the position determination unit 12 determines that the vehicle is located at any one of the caution points 1 to n (step ST2; YES), the threshold determination unit 13 refers to the determination table 14 shown in FIG. The first value of the caution point where the vehicle is located among the first values a1 to an of the allowable threshold value at the caution points 1 to n is set as the allowable threshold value in the comparison unit 16 (step ST3).
When it is determined that the vehicle is located at a point other than the caution point (step ST2; NO), the threshold value determination unit 13 refers to the determination table 14 shown in FIG. One value A is set in the comparison unit 16 as an allowable threshold (step ST4).

The comparison unit 16 compares the driver's arousal level received from the arousal level acquisition unit 15 with the allowable threshold set by the threshold determination unit 13, and determines whether or not the driver's arousal level is below the allowable threshold. (Step ST5).
If the driver's arousal level is greater than or equal to the allowable threshold (step ST5; NO), the process is terminated. Note that the series of processing shown in FIG. 4 is repeatedly performed at a predetermined cycle.

When the comparison unit 16 determines that the driver's arousal level has fallen below the allowable threshold (step ST5; YES), the awakening operation control unit 18 refers to the determination table 19 shown in FIG. Of countermeasures to be executed when the person's arousal level falls below the allowable threshold (first value) M _a1 , M _a2 ,..., M _an , M _A of the countermeasures corresponding to the position of the vehicle Is determined and executed (step ST6).

In the case of FIG. 4, since the content of the countermeasure corresponding to the first value is “warning to the driver”, the awakening operation control unit 18 instructs the output device 6 to issue a warning that prompts the driver to wake up. .
For example, a warning sound “Please drive firmly” is output from the speaker 60.
Further, a warning message is displayed on the monitor 61, and the driver is made aware that the arousal level is lowered by blinking the screen.
It should be noted that the volume of the speaker 60 is increased and the warning on the monitor 61 is emphasized and displayed at a caution point where the driver should be encouraged to drive carefully. In this way, it is possible to effectively warn at a point where the driver wants to quickly notice that the awakening level has decreased.

  When the countermeasure corresponding to the first value is executed, the comparison unit 16 compares the driver's wakefulness level sequentially received from the wakefulness level obtaining unit 15 with the allowable threshold (first value) set by the threshold determination unit 13. Then, it is determined whether or not the driver's arousal level has returned to the allowable threshold (first value) or more (step ST7). Here, when the driver's arousal level returns to the allowable threshold (first value) or more (step ST7; YES), the awakening operation control unit 18 instructs the output device 6 to cancel the warning operation (step ST8). ). Thereafter, the process is terminated.

  When it is determined that the driver's arousal level remains below the allowable threshold (first value) (step ST7; NO), the threshold determination unit 13 refers to the determination table 14 and corresponds to the position of the vehicle. The next allowable threshold (second value) is determined, and this value is set in the comparison unit 16 (step ST9). The comparison unit 16 compares the driver's wakefulness level sequentially received from the wakefulness level acquisition unit 15 with the allowable threshold value (second value) set by the threshold value determination unit 13, and the driver's wakefulness level is determined to be an allowable threshold value (second value). It is determined whether or not the value has fallen below (step ST10).

  When the comparison unit 16 determines that the driver's arousal level is equal to or higher than the allowable threshold (second value) (step ST10; NO), the threshold determination unit 13 returns the allowable threshold to the first value (step ST11). The process returns to step ST7. Thereby, if the driver's arousal level has returned to the allowable threshold value (first value) or more, the process ends via step ST8.

On the other hand, when it is determined by the comparison unit 16 that the driver's arousal level has fallen below the allowable threshold (second value) (step ST10; YES), the awakening operation control unit 18 refers to the determination table 19 and drives. Of countermeasures to be executed when a person's arousal level falls below the allowable threshold (second value) M _b1 , M _b2 ,..., M _bn , M _B of countermeasures corresponding to the position of the vehicle Is determined and executed (step ST12).

The fact that the driver's arousal level has fallen below the second value is a state in which the reduction of the arousal level has progressed, and therefore a new coping action is executed in addition to the warning to the driver.
In FIG. 4, the content of the countermeasure corresponding to the second value is “vehicle control”, and the awakening operation control unit 18 instructs the vehicle control device 7 to perform vehicle control corresponding to the driver's arousal level.
For example, the vehicle control device 7 vibrates the seat vibrator 70 or increases the air volume of the air conditioner 71 in accordance with an instruction from the awakening operation control unit 18.
Further, when the vehicle is at the caution point 1 and the caution point 1 is a highway, the vehicle control device 7 reduces the vehicle speed to the legal minimum speed in accordance with an instruction from the awakening operation control unit 18 and maintains the speed. (Control of the accelerator 75). When the vehicle is traveling on a general road, the vehicle is decelerated to a stop state by facing the shoulder. At this time, the following vehicle may be alerted by turning on and blinking the blinker light which is the light 73.

Next, the threshold determination unit 13 refers to the determination table 14, determines the next allowable threshold (third value) corresponding to the position of the vehicle, and sets this value in the comparison unit 16 (step ST13). .
The comparison unit 16 compares the driver's wakefulness level sequentially received from the wakefulness level acquisition unit 15 with the allowable threshold value (third value) set by the threshold value determination unit 13, so that the driver's wakefulness level is equal to the allowable threshold value (third value). It is determined whether or not the value has fallen below (step ST14).

  When the comparison unit 16 determines that the driver's arousal level is equal to or higher than the allowable threshold (third value) (step ST14; NO), the threshold determination unit 13 returns the allowable threshold to the second value (step ST15). The process returns to step ST10. Thereby, if the driver's arousal level has returned to the allowable threshold value (second value) or more, the process ends via step ST11, step ST7, and step ST8.

When it is determined that the driver's wakefulness level is lower than the allowable threshold (third value) (step ST14; YES), the wakefulness control unit 18 refers to the determination table 19 and the driver's wakefulness level is the allowable threshold. (third value) the contents of address to be executed when the below _{M c1, M c2, ···,} M cn, among _{M C,} run to determine the contents of the address corresponding to the position of the vehicle.
If the driver's wakefulness level has fallen below the third value, it means that the wakefulness level has declined considerably, so in addition to the driver's warning and vehicle control, the driver's state is also warned outside the vehicle. I think it should be. In the example of FIG. 4, the content of the countermeasure corresponding to the third value is “warning outside the vehicle”.

In step ST <b> 16, the awakening operation control unit 18 determines whether there is a warning target outside the vehicle based on the information indicating the surrounding state of the vehicle received from the surrounding state acquisition unit 17.
Note that the warning target outside the vehicle may be, for example, an oncoming vehicle, a two-wheeled vehicle including a bicycle, a pedestrian, or the like.

When the warning target is not detected outside the vehicle (step ST16; NO), the process returns to step ST14 and the above-described processing is repeated.
When a warning target is detected outside the vehicle (step ST16; YES), the awakening operation control unit 18 instructs the vehicle control device 7 to warn the warning target outside the vehicle (step ST17). For example, if a vehicle is running on the white line at the center of the road and an oncoming vehicle is detected, it is confirmed that the driver's arousal level has decreased by blinking the headlight or passing the headlight. To warn. When a bicycle or a pedestrian is detected on the side of the vehicle, the horn 72 is controlled to sound a horn.

  The awakening operation control unit 18 returns to step ST14 every time the warning of step ST17 is executed. In step ST14, if the driver's arousal level returns to the third value or higher, the process is terminated through steps ST15, ST10, ST11, ST7, and ST8.

In the first embodiment, the threshold determination unit 13 sets an allowable threshold with reference to the determination table 14, and the awakening action control unit 18 determines the content of the countermeasure with reference to the determination table 19. Although the case is shown, the present invention is not limited to this.
In other words, in the present invention, the threshold determination unit 13 may set the allowable threshold with reference to the determination table 14, and the wakefulness control unit 18 does not necessarily need to use the determination table 19.

  As described above, according to the first embodiment, the position determination unit 12 determines whether or not the vehicle is at a predetermined caution point based on the position information and map information of the vehicle. Based on the determination result of the position determination unit 12, the threshold determination unit 13 refers to the determination table 14 in which the allowable threshold of the driver's arousal level corresponding to the attention point and a point other than the attention point is registered. Determine an acceptable threshold at the position. The comparison unit 16 determines whether or not the driver's arousal level is below the allowable threshold determined by the threshold determination unit 13. Then, the awakening operation control unit 18 performs a countermeasure when the comparison unit 16 determines that the driver's arousal level is below the allowable threshold. By comprising in this way, the determination sensitivity of a driver | operator's arousal level fall is changed according to the driving location of a vehicle, and the determination according to the driving location of a vehicle is attained. Thereby, it is possible to quickly cope with a decrease in the arousal level at a place where the driver wants to drive more carefully.

  In addition, according to the first embodiment, the determination that the wakefulness action control unit 18 has registered the contents of countermeasures to be executed when the driver's wakefulness level falls below the allowable threshold at points other than the cautionary point and the cautionary point. Based on the table 19 for use, the contents of the countermeasure at the position of the vehicle are determined and executed. By doing in this way, when the driver's arousal level falls below the allowable threshold, it is possible to execute a countermeasure corresponding to each point.

  Further, according to the first embodiment, the determination table 14 registers an allowable threshold value that is higher than a point other than the point of caution for a point of caution where the driver should encourage careful driving. By configuring in this way, the sensitivity of lowering the wakefulness level is increased at the point of caution where the driver should be cautiously driven, so that the countermeasure when the wakefulness level falls below the allowable threshold can be quickly executed. .

Further, according to the first embodiment, the determination table 14 is registered with a plurality of permissible threshold values including a permissible threshold value corresponding to a caution point and a point other than the caution point and a permissible threshold value that is reduced stepwise. Yes. In addition, in the determination table 19, the contents of countermeasures to be executed when the driver's arousal level falls below each of the plurality of allowable threshold values are registered.
The threshold determination unit 13 refers to the determination table 14 and sequentially sets an allowable threshold at the position of the vehicle and an allowable threshold in which the threshold is lowered step by step. In addition, the comparison unit 16 compares the driver's arousal level with the allowable threshold value set in order by the threshold value determination unit 13.
Then, the awakening action control unit 18 corresponds to the permissible threshold that is determined by the comparison unit 16 to be lower than the awakening level of the driver among the permissible thresholds sequentially set by the threshold determination unit 13 based on the determination table 19. The content of the countermeasure to be performed is determined as the content of the countermeasure at the position of the vehicle and executed. By comprising in this way, the fall of a driver | operator's alertness level can be judged in steps at each point, and the content according to each judgment can be dealt with.

  In the present invention, any component of the embodiment can be modified or any component of the embodiment can be omitted within the scope of the invention.

  DESCRIPTION OF SYMBOLS 1 In-vehicle system, 2 GPS receiver, 3 Map DB, 4 Arousal level detection apparatus, 5 Peripheral condition detection apparatus, 6 Output device, 7 Vehicle control apparatus, 10 Position information acquisition part, 11 Map information acquisition part, 12 Position determination part , 13 Threshold determination unit, 14, 19 Determination table, 15 Awakening level acquisition unit, 16 Comparison unit, 17 Peripheral situation acquisition unit, 18 Awakening operation control unit, 60 Speaker, 61 Monitor, 70 Seat vibrator, 71 Air conditioner, 72 Horn, 73 light, 74 engine, 75 accelerator.

Claims (4)

A position determination unit that determines whether or not the vehicle is at a predetermined point of caution based on vehicle position information and map information;
Based on the determination result of the position determination unit, the allowable position at the position of the vehicle with reference to the first determination table in which the allowable threshold value of the driver's arousal level corresponding to the attention point and a point other than the attention point is registered. A threshold value determination unit for determining a threshold value;
A comparison unit for determining whether or not the driver's arousal level is below the allowable threshold determined by the threshold determination unit;
A vehicle-mounted system provided with the control part which performs a countermeasure when it is determined by the said comparison part that a driver | operator's arousal level is less than an allowable threshold value.   The control unit is configured to control the vehicle based on a second determination table in which contents of countermeasures to be executed when a driver's arousal level falls below an allowable threshold at points other than the caution point and the caution point are registered. The in-vehicle system according to claim 1, wherein the content of the countermeasure at the position is determined and executed.   3. The first determination table, wherein an allowable threshold value higher than a point other than a point of caution is registered at a point of caution where a driver should be cautiously driven. In-vehicle system. In the first determination table, a plurality of permissible threshold values including a permissible threshold value corresponding to a caution point and a point other than the caution point, and a permissible threshold value that is reduced stepwise are registered.
In the second determination table, the content of countermeasures to be executed when the driver's arousal level falls below each of the plurality of allowable thresholds is registered,
The threshold value determination unit sequentially sets an allowable threshold value at the position of the vehicle and an allowable threshold value that is reduced stepwise with reference to the first determination table,
The comparison unit compares the driver's arousal level with an allowable threshold set in order by the threshold determination unit,
The control unit corresponds to an allowable threshold that is determined by the comparison unit to be lower than the driver's arousal level among the allowable thresholds sequentially set by the threshold determination unit based on the second determination table. The in-vehicle system according to claim 2, wherein the content of the countermeasure is determined and executed as the content of the countermeasure at the position of the vehicle.

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