JP2010122732A - Safe driving support system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe driving support system that supports safe driving for prevention of accidents by monitoring daily vehicle driving states and daily sleeping states and working on an occupant and a vehicle without using special sensors on the vehicle for detecting the occupant's biological information. <P>SOLUTION: The safe driving support system includes: a sleeping state computation part 2 for computing sleeping state information indicating a sleeping state including the quality of sleep from biological information detected during sleep; a driving state computation part 4 for computing driving state information indicating a driving state including the quality of driving based on the behavior of a vehicle 30 detected during running; a driving level setting part 5 for setting a driving level map 6 indicating a correlation between the level of the sleeping state and the level of the driving state according to the sleeping state information and driving state information; and an alarm information setting part 7 for setting alarm information having a plurality of different alarm levels according to the latest sleeping state information obtained via an information transmission means 9 and the driving level map 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a safe driving support system that monitors a driving state of a vehicle by an occupant and a daily sleeping state of the occupant and informs one or both of the occupant and the vehicle and supports safe driving. .

  As a technology related to such a safe driving support system, there is a physical condition management system disclosed in Japanese Patent Laid-Open No. 2008-113946 (Patent Document 1). This physical condition management system includes a sleeping physical condition management unit and a driving physical condition management unit, and both management units mutually transmit physical condition information and biological information via the information transmission unit. The bedtime physical condition management unit detects bedtime biological information such as pulse, breath, body temperature, and body movement during bedtime, and calculates bedtime physical condition information. The driving physical condition management unit detects biological information during driving such as pulse, breathing, and movement of the line of sight while getting on the vehicle, and calculates the physical condition information during driving. The driving physical condition information is calculated by the driving physical condition management unit based on the driving biological information detected by the driving physical condition management unit and the bedtime physical condition information acquired via the information transmission unit. Similarly, the bedtime physical condition information is calculated by the bedtime physical condition management unit based on the bedtime biological information detected by the bedtime physical condition management unit and the driving physical condition information acquired via the information transmission unit. The driving physical condition management unit controls driving assistance operations such as arousal assistance when the driver's concentration is reduced and notifications that prompt a break based on the calculated physical condition information during driving. In addition, about the detection method of living body information, such as sleeping, it is introduced in international publication WO98 / 52467 (patent document 2) etc., for example.

JP 2008-1113946 (paragraphs 22-23, FIGS. 1-7, etc.) International Publication WO98 / 52467 pamphlet (Fig.3-7, Fig.19 etc.)

  In the technique described in Patent Literature 1, driving physical condition information is calculated using biological information (biological information during driving) acquired during driving, and driving assistance operation is controlled based on the driving physical condition information. Therefore, the vehicle needs a sensor for acquiring occupant's biological information such as pulse, respiration, and line of sight during driving. In addition, the above technique does not function unless a predetermined state is obtained, such as actually falling asleep during driving. Therefore, there is a demand for a system having a function that can prevent accidents and the like.

  The present invention was devised in view of the above problems, and without providing a special sensor for detecting the occupant's biological information on the vehicle side, the occupant's daily driving state of the occupant and the occupant's daily sleep An object of the present invention is to provide a safe driving support system that monitors the state and works on passengers and vehicles to support safe driving so that accidents and the like can be prevented.

In order to achieve the above object, the characteristic configuration of the safe driving support system according to the present invention is as follows:
A safe driving support system for monitoring a driving state of a daily vehicle by an occupant and a daily sleeping state of the occupant and notifying one or both of the occupant and the vehicle and supporting safe driving. ,
A sleep state calculation unit that calculates sleep state information indicating a sleep state including the quality of sleep based on biological information detected during sleep;
A driving state calculation unit that calculates driving state information indicating a driving state including driving quality based on the behavior of the vehicle detected during traveling;
A driving level setting unit that acquires the sleep state information and the driving state information, and sets a driving level map indicating a correlation between the level of the sleeping state and the level of the driving state based on the history of the both information;
It is in the point provided with the alerting | reporting information setting part which sets the alerting | reporting information which has several different alerting | reporting levels based on the said driving level map and the said latest sleep state information acquired via the information transmission means.

  A vehicle is provided with an acceleration sensor, a speed sensor, and the like in order to control driving assistance devices and safety devices. If the detection results of these sensors are used, the level of the driving state including the driving quality can be quantitatively detected as the driving state information. Therefore, it is possible to detect the operating state without separately mounting a dedicated sensor. According to this feature configuration, the driving level map is set based on the history of the driving state information that can be acquired in this way and the sleep state information that is calculated using the biological information that is separately acquired while sleeping. Is done. Based on the driving level map and the latest sleep state information, notification information for the occupant and the vehicle is set when the vehicle is driven. The notification information is, for example, information indicating points to be noted regarding driving for the occupant, and information for controlling the behavior of the vehicle and the occupant's living environment for the vehicle. Therefore, without providing a special sensor for detecting the occupant's biological information on the vehicle side, it is possible to work on the occupant and the vehicle when driving the vehicle and to support safe driving so that accidents can be prevented in advance. It becomes.

  In the safe driving support system according to the present invention, it is preferable that the driving level setting unit sets the driving level map based on the sleep state information and the driving state information acquired in the past predetermined collection period.

  The correlation between the sleep state level and the driving state level changes according to the age and the like. It may also change according to the season. When the driving level map is set based on the sleep state information and the driving state information acquired over the past predetermined collection period, the old information acquired before the predetermined collection period is excluded and newly The driving level map can be updated using the acquired information. Therefore, according to this configuration, it is possible to secure a sufficient number of samples for setting the driving level map, and to satisfactorily follow the secular change and the climate change.

  In addition, the notification information setting unit of the safe driving support system according to the present invention collects the sleep state information and the driving state, which are collected over the predetermined collection period and indicate a correlation between a sleep state level and a driving state level. When the total number of samples of the information pair is less than a predetermined lower limit total number of samples, the notification information is set according to the sleep state level indicated in the latest sleep state information regardless of the driving level map. Is preferred.

  When the total number of samples as a pair of sleep state information and driving state information indicating the correlation between the sleep state level and the driving state level is small, the reliability of the correlation in the driving level map is lowered. On the other hand, it is considered that the level of athletic ability and driving ability corresponding to the level of sleep state has a general correlation although there are individual differences. Therefore, when the total number of samples is small, setting the notification information according to the level of the sleep state indicated in the latest sleep state information causes at least a sense of incongruity for the occupant and can set general notification information. It becomes possible.

  Further, the notification information setting unit of the safe driving support system according to the present invention is configured such that the level of the driving state with respect to the level of the sleeping state in the driving level map set based on the information collected over the predetermined collection period. When it is determined that the level of the driving state is decreasing by determining whether the correspondence is moving in a direction in which the level of the driving state is decreasing for each predetermined check period shorter than the predetermined collection period. It is preferable that the notification information is set so that the level of the driving state tends to decrease.

  As described above, the correlation between the level of the sleep state and the level of the driving state changes according to age, season, and the like. It may also change depending on the working environment and living environment. Such changes are sequentially reflected in the driving level map, but it is better if the changes are checked every predetermined check period shorter than the predetermined collection period for setting the driving level map. . When the level of the driving state tends to decrease, it is possible to promote further safe driving by including this tendency in the notification information.

  In addition, the notification information setting unit of the safe driving support system according to the present invention includes a driving state level corresponding to the sleep state level indicated in the latest sleeping state information acquired via the information transmission unit, and It is preferable to obtain a driving state level corresponding to a level equal to or higher than the sleeping state level from the driving level map and set the notification information based on a difference in driving state level due to a difference in sleeping state level. is there.

  Generally, after sufficient sleep is obtained, the quality of driving also improves. According to this feature, the notification information is set on the basis of the level of the driving state corresponding to the sleep state level equal to or higher than the sleep state level indicated in the latest sleep state information. In other words, compared to the driving state when the sleep state level is equal to or better than the sleep state level indicated in the latest sleep state information, what kind of driving state is the current sleep state level From this point of view, notification information is set. Therefore, since the notification information is set in a direction to call attention to the occupant, the occupant is restrained from relaxing. As a result, the passenger is more likely to perform safe driving, which is preferable.

  Here, the notification information setting unit of the safe driving support system according to the present invention, when the level of the driving state is reduced according to the reduction of the level of the sleeping state, In addition, when there is no difference in the level of the driving state regardless of the decrease in the level of the sleep state, the notification information is set without including the caution regarding the sleep driving in the notification information.

  When the level of the driving state is reduced in accordance with the reduction in the level of the sleeping state, the reduction in the level of the sleeping state affects the level of the driving state. Therefore, when notification information is set including attention related to sleep quality related to sleep quality, a decrease in safety associated with a decrease in sleep state level can be suppressed. On the other hand, when there is no difference in the level of the driving state regardless of the difference in the level of the sleep state, the notification information does not include a caution regarding the sleep driving. Therefore, the passenger does not feel bothered by inappropriate attention.

  In addition, here, the notification information setting unit of the safe driving support system according to the present invention, the driving state corresponding to the sleep state level indicated in the latest sleep state information acquired via the information transmission unit When the number of samples in the driving level map corresponding to at least one of the level of the driving state and the level of the driving state corresponding to the level of the sleeping state equal to or higher than the level of the sleeping state is less than the predetermined lower limit individual sample number Regardless of the difference in the level of the driving state due to the difference in the level of the sleep state, the notification information is set by including the notice regarding the sleep driving in the notification information.

  When the sample number is less than the predetermined lower limit individual sample number, it cannot be said that the reliability of the correlation regarding the difference in the driving state level due to the difference in the sleeping state level is high. Therefore, it is better to set the broadcast information in consideration of safety than to set the broadcast information based on the correlation that is not highly reliable. Therefore, in consideration of the possibility of dozing driving accompanying a decrease in the level of the sleep state, it is preferable that the notification information is set by including the notice regarding the dozing driving in the notification information.

  In addition, the notification information setting unit of the safe driving support system according to the present invention may be configured such that the sleep state level indicated in the sleep state information received in a predetermined number of consecutive days in the past from the date of receiving the latest sleep state information. However, if the transition is below the predetermined lower limit sleep state, it is preferable that information for prompting to refrain from driving is included in the notification information regardless of the driving level map.

  If the level of sleep state is low, exercise ability and driving ability generally decrease. Therefore, when the state of poor sleep quality that falls below the predetermined lower limit sleep state continues, the driving operation power, judgment power, etc. may be reduced. In such a case, it is preferable to refrain from driving. Regardless of the driving level map, the information that prompts the user to refrain from driving is included in the notification information, so that safety can be improved.

  In addition, the notification information setting unit of the safe driving support system according to the present invention, when the driving of the vehicle is started in a predetermined warning time period in which physiological drowsiness is likely to occur and when the driving is continued, It is preferable to set the notification information by adding caution information about sleepiness set according to the notification level.

  Time zones that are physiologically prone to sleepiness are known. Therefore, attention information regarding sleepiness corresponding to the notification level of the notification information is added to the notification information set based on the driving level map. By adding caution information based on physiological statistics to the notification information set in accordance with the characteristics of the occupant, it is possible to further promote safe driving.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram schematically showing a configuration example of a safe driving support system according to the present invention. The safe driving support system 10 is a system that supports safe driving by monitoring the daily driving state of the vehicle by the occupant and the daily sleeping state of the occupant and notifying one or both of the occupant and the vehicle. is there. As shown in FIG. 1, the safe driving support system 10 includes a biological information detection unit 1, a sleep state calculation unit 2, a behavior detection unit 3, a driving state calculation unit 4, a driving level setting unit 5, and a driving level. A map 6, a notification information setting unit 7, and information transmission means 9 are provided.

In the present embodiment, the living body information detection unit 1 and the sleep state calculation unit 2 are provided in the sleeping system exemplified by the bed 20. In the present embodiment, the behavior detection unit 3, the driving state calculation unit 4, the driving level setting unit 5, the driving level map 6, and the notification information setting unit 7 are provided in the vehicle 30. The information transmission means 9 is, for example, a memory card, and both the bed 20 and the vehicle 30 are provided with card slots capable of reading and writing information with respect to the memory card. Of course, the information transmission means 9 is not limited to a memory card, and may be another medium such as an optical disk, a magneto-optical disk, a flash memory, or an IC card. Moreover, the information transmission means 9 is not limited to a tangible storage medium, and may be configured by communication means such as wireless communication or communication via a communication network such as the Internet. Further, the vehicle 30 is equipped with a device that can acquire date and time information, such as a radio clock or a GPS (global positioning system) system. The driving state calculation unit 4, the notification information setting unit 7 and the like can be calculated using date information and time information.

  The biological information detection unit 1 is a sensor provided in the bed 20 in the present embodiment. This sensor is, for example, a sensor using a piezoelectric element (piezoelectric sensor), and is installed at least one place on the bed 20 where the weight of the user (occupant) is applied. Of course, you may install in multiple places. The piezoelectric sensor outputs, as a detection result, the amount of electric charge that has been subjected to piezoelectric conversion in accordance with an external force such as vibration. The piezoelectric sensor outputs a detection result corresponding to an external force such as a pulse, respiration, and body movement of the user lying on the bed 20. A user's pulse, respiration, body movement, and the like correspond to the biological information of the present invention. Details of such a method for detecting biological information are known as disclosed in, for example, International Publication WO98 / 52467 (Patent Document 2) and the like, and thus detailed description thereof is omitted. The body temperature may be detected as biological information using not only the piezoelectric sensor but also a temperature sensor. The sleeping time is also taken as the biological information of the present invention.

  The sleep state calculation unit 2 calculates sleep state information indicating the sleep state including the quality of sleep based on the biological information detected during sleep. For example, when there are many body movements, it is conceivable that it is difficult to sleep and sleep. In addition, sleep state information is calculated based on biological information such as respiration, pulse, body temperature, and sleep time. In this embodiment, the calculated sleep state information is recorded on a memory card and transmitted to the vehicle 30 by the user (occupant).

  The vehicle 30 includes a behavior detection unit 3 that detects the behavior of the vehicle when the vehicle is traveling. The behavior detection unit 3 is configured by, for example, an acceleration sensor or a speed sensor. These sensors can use sensors mounted on the vehicle 30 in order to control driving operation assistance devices and safety devices. The acceleration sensor is a sensor that detects acceleration generated in the vehicle 30 and detects acceleration generated by sudden start, sudden braking, sudden turning, or the like. Moreover, a speed sensor is a sensor which is equipped with a wheel, for example, detects a vehicle speed by detecting the rotation speed of a wheel. It is also possible to detect irregular increase / decrease in speed, excess speed, etc. by the speed sensor. In addition, it is possible to detect a sudden turn, meandering, or the like by the steering angle sensor. The sudden start, sudden braking, sudden turn, irregular increase / decrease in speed, excess speed, sudden turn, meandering and the like exemplified above correspond to the behavior of the vehicle of the present invention. Detailed detection principles and the like of each behavior are known from many documents and the like, and thus detailed description thereof is omitted. In addition, the above behavior is an example, and does not prevent other physical phenomena from becoming behavior.

  The driving state calculation unit 4 calculates driving state information indicating the driving state including the driving quality based on the behavior of the vehicle 30 detected by the behavior detection unit 3. For example, when there are many sudden starts, sudden brakings, sudden turns, etc. or meandering, driving state information including information that the driving quality is not good is output as a calculation result.

  The driving level setting unit 5 acquires sleep state information and driving state information, and sets a driving level map 6 that indicates the correlation between the sleep state level and the driving state level based on the history of both information. Part. The driving level map 6 quantifies the correspondence between the sleeping state and the driving state. Since the relationship between the sleep state and the driving state changes depending on the age, the season, and the like, the sleep state and the driving state are mapped from the sleep state and the driving state accumulated over a predetermined past collection period. The predetermined collection period is, for example, 3 months. FIG. 2 is an explanatory diagram schematically showing an example of the driving level map 6. As shown in FIG. 2, when the sleep state and the driving state are each divided into three levels, nine blocks can be divided. This is an example, and the sleep state and the driving state may be divided into levels other than three. At that time, the sleep state and the driving state may be divided into different numbers of stages. The driving level map 6 is updated as appropriate. The renewal time may be every day, every week, every month, every three months.

  Here, the three levels of “good”, “slightly bad”, and “bad” are preferably level divisions quantitatively derived from sleep state information and driving state information. For example, sleep state information and driving state information are each quantified into information having a score of 0 to 100 points. The case of 70 points or more can be “good”, the case of 50 points or more and less than 70 points can be “slightly bad”, and the case of less than 50 points can be “bad”. Needless to say, a range of different points may be assigned to the sleep state information and the driving state information, and it is also possible to divide into levels other than three.

  FIG. 3 is an explanatory diagram showing an example mapped to the driving level map 6 shown in FIG. The number described in one frame of the driving level map 6 is the number of samples that is a pair of sleep state information and driving state information. FIG. 3 shows a driving level map 6 set based on the sleeping state and driving state accumulated over the past three months. The total number of samples is 69. In the figure, a circled frame indicates a driving state having the maximum frequency for each sleeping state. In other words, when the sleep state is “good” and when the sleep state is “slightly bad”, the driving state is “good” most frequently, and when the sleep state is “bad”, the driving state is “slightly bad”. The frequency is high.

  The notification information setting unit 7 is a functional unit that sets notification information to notify an occupant when driving a vehicle based on the driving level map 6 and the latest sleep state information acquired via the information transmission means 9. . An example of setting broadcast information will be described below. Prior to the description regarding the setting of notification information, “notification information” will be briefly described. In the present embodiment, “notification information” is provided in two types, “driving warning” and “slumber warning”. The “driving warning” is mainly notification related to the driving operation, for example, a message such as “Please drive with attention to the surroundings”. The “slumber warning” is mainly a notification about an arousal state, and is, for example, a message such as “Because the sleep state is bad, please give your driver more than usual.” In the present embodiment, based on the driving level map 6 and the latest sleep state information acquired via the information transmission means 9, the optimal “driving warning” or “slumber warning” is set as “notification information”. Is done. The “driving warning” is a warning that does not include the notice regarding the drowsiness driving in the notification information, and the “driving warning” is a warning that includes the notice regarding the drowsiness driving in the notification information. Specific examples are shown below along with specific application examples.

  Based on the latest sleep state information, the notification information setting unit 7 determines from the driving level map 6 what kind of driving state the sleep state is equal to or higher than the sleep state level indicated in the sleep state information. get. As the driving state in the sleep state indicated in the latest sleep state information, the notification information is set so that the sleep state is reduced or equivalent to that in the case where the sleep state is equal or higher.

  Specifically, it is assumed that the sleep state level indicated in the latest sleep state information is a sleep state belonging to “somewhat bad”. In this case, the driving state at the sleep state level (“good”) equal to or higher than the sleep state level (“somewhat bad”) is acquired from the driving level map 6. Here, when the acquired driving state level belongs to “slightly bad”, notification information is set to suppress further deterioration of the driving state level as the sleep state level decreases. Is done. In other words, even when the sleep state is good, the driving state is “slightly bad”, so it is considered that the driving state level may further decrease as the sleep state level decreases. Is set to notify information that suppresses the decrease.

  Hereinafter, a description will be given based on specific examples. 4 to 6 are correspondence diagrams showing the relationship between the sleep state indicated in the latest sleep state information, the driving state of the driving level map corresponding to the sleeping state, and the notification information set at that time. is there. FIG. 4 shows a correspondence diagram when the sleep state level is “good”, FIG. 5 shows a correspondence diagram when the sleep state level is “somewhat bad”, and FIG. 6 shows the sleep state level. The correspondence diagram in the case of “bad” is shown.

  As shown in FIG. 4, when the sleep state level is “good”, there is no sleep state with a higher level than the sleep state indicated in the latest sleep state information. Therefore, the driving state corresponding to the “good” level that is the equivalent sleep state is acquired from the driving level map 6, and the notification information is set based on the level of the driving state. In this case, since the sleep state is at the “good” level, “driving warning” that is the notification information regarding the driving operation is set instead of the “sleeping warning” that is the notification information regarding the sleep state.

  Specifically, in the driving level map 6, when the driving state is “good” level, “driving warning A” is set as the notification information. The driving warning A is, for example, a message “Please try to drive safely today.”

  When the driving state is “slightly bad” level, “driving warning B” is set as notification information. The driving warning B is, for example, a message “Please drive with your brakes early and pay attention to your surroundings”. Even if the sleep state is at a “good” level, the occupant has a level of “slightly bad” in the driving state, and therefore a message that calls attention to the driving operation is set.

  When the driving state is “bad” level, “driving warning C” is set as the notification information. The driving warning C is, for example, a message such as “There is a tendency to be distracted. Please drive calmly. Even if the sleep state is at a “good” level, since the occupant is at a “bad” driving state, a message that strongly calls attention to the driving operation is set.

  As shown in FIG. 5, when the sleep state is a “slightly bad” level, the sleep state of the “good” level that is a higher sleep state than the sleep state indicated in the latest sleep state information The notification information is determined and set on the basis of. More specifically, the driving state corresponding to the level of “slightly bad” sleep state is acquired from the driving level map 6, and the driving state corresponding to the level of “good” sleeping state is further acquired from the driving level map 6. The Then, the notification information is determined and set based on these operating states. That is, the notification information is set based on the driving state at the current sleep state level (“somewhat bad”) and the driving state at a better driving state level (“good”) than the sleeping state. The notification information is set in consideration of how the driving state changes as the sleep state decreases. Therefore, the notification information is a “sleeping warning” or “driving warning” according to the level of the driving state acquired from the driving level map 6. This will be specifically described below.

  First, the first determination condition for determining the notification information will be described. FIG. 7 is a correspondence diagram showing first determination conditions for determining notification information. As shown in FIG. 7, it is discriminated into four discrimination numbers according to the first discrimination condition. That is, when the sleep state is at a “good” level and the driving state is at a “good” level, the discrimination number is “1”. If the sleep state is “good” and the driving state is “slightly bad”, the discrimination number is “2”. If the sleep state is “good” and the driving state is “bad”, the discrimination number is “3”. In the driving level map 6, when there is no sample corresponding to the sleep state “good”, the discrimination number is “4”.

  First, when the sleep state is “slightly bad” and the driving state level acquired from the driving level map 6 is “good”, the notification information is set by applying the first determination condition of FIG. The case where it does is demonstrated. In this case, the notification information is acquired from the notification information list 1 and set based on the determination result of the first determination condition. FIG. 8 is a correspondence diagram showing the notification information when the sleep state indicated in the latest sleep state information is at the “slightly bad” level. FIG. 8 shows correspondences between the notification information lists 1 to 3. In this case, the notification information is acquired from the notification information list 1. Shading in the figure will be described later.

  If it is determined that the determination number is “1” based on the first determination condition, “driving warning A” is set as shown in FIG. As described above, the driving warning A is, for example, a message “Please try to drive safely today.” Whether the sleep level is “good” or “slightly bad”, the driving state level is “good”, so there is no concern about a decrease in the driving state level due to a decrease in the sleeping state level. A message that prompts the user to continue the driving operation is set as notification information.

  Referring to FIG. 8, when the sleep state level is “good” and the driving state level is “somewhat bad” or “bad”, the discrimination numbers are “2” or “3”. Operation warning A ”is set. In this case, since the level of the driving state does not decrease as the level of the sleep state decreases, a message that prompts the user to continue a good driving operation is set as the notification information. The same applies when the discrimination number is “4”.

  Next, when the level of the driving state acquired from the driving level map 6 at the level of “slightly bad” is “slightly bad”, the first determination condition of FIG. The case of setting will be described. In this case, notification information is acquired and set from the notification information list 2 shown in FIG. 8 based on the determination result of the first determination condition.

  If it is determined that the determination number is “1” based on the first determination condition, “slumber warning A” is set. The “sleeping warning A” is, for example, a message “Because the sleep state is a little worse, please pay more attention to driving than usual.” In other words, because the level of sleep state has dropped from “good” to “somewhat bad”, the level of driving state has dropped from “good” to “somewhat bad”, so the decrease in sleep level has been reduced to driving state This is thought to have affected the decline in the level of Therefore, “dozing warning A” is set as the notification information in order to call attention regarding the sleep state.

  If the determination number is “2” based on the first determination condition, “driving warning B” is set. As described above, the driving warning B is, for example, a message “Be sure to drive the brakes early, paying attention to the surroundings.” In this case, since the level of the driving state does not decrease as the level of the sleep state decreases, “driving warning B” corresponding to the case where the level of the driving state is “somewhat bad” is set.

  Even when it is determined that the determination number is “3” based on the first determination condition, “driving warning B” is set. In this case, the level of the driving state is improved with a decrease in the level of the sleeping state. Accordingly, “driving warning B” is set in order to prompt the continuation of the driving state corresponding to the case where the level of the driving state is “somewhat bad”. The same applies when the discrimination number is “4”.

  Subsequently, when the level of the driving state acquired from the driving level map 6 at the level of “slightly bad” is “bad”, the first determination condition of FIG. The case of setting will be described. In this case, notification information is acquired from the notification information list 3 shown in FIG. 8 and set based on the determination result of the first determination condition.

  A case where the determination number “2” is determined based on the first determination condition prior to the determination number “1” based on the first determination condition will be described. If it is determined that the determination number is “2”, “slumber warning B” is set. The “sleeping warning B” is, for example, a message “The driving ability is lowered because the sleeping state is a little bad. Please drive carefully.” In other words, the sleep state level has decreased from “good” to “slightly bad”, so the driving state level has decreased from “slightly bad” to “bad”. This is thought to have affected the decline in the level of Furthermore, since the level of the driving state is lower than that in the case where the “slumber warning A” is set, the “slumber warning B”, which is more alert than the “slumber warning A”, is set as the notification information.

  If it is determined that the determination number is “1” based on the first determination condition, “slumber warning C” is set. The “slumber warning C” is, for example, a message “Your sleep state is a little worse, so there is a tendency for a significant decrease in driving ability. In other words, the sleep state level has decreased significantly from “good” to “bad” because the sleep state level has decreased from “good” to “slightly bad”, so the decrease in sleep state level has been reduced to the driving state. This is thought to have greatly affected the decline in the level of Therefore, in order to strongly recognize that the driving ability tends to decrease due to the decrease in the level of the sleep state, the “slumber warning C” that calls attention more strongly than the “slumber warning A” and “slumber warning B” is provided. Set as broadcast information.

  If the determination number “3” is determined based on the first determination condition, “driving warning C” is set. As described above, the driving warning C is, for example, a message such as “There is a tendency to be distracted. Please drive calmly. In this case, since the level of the driving state does not decrease as the level of the sleep state decreases, the “driving warning C” corresponding to the case where the level of the driving state is “bad” is set. The same applies when the discrimination number is “4”.

  Thus, the notification information is set based on the driving state at the level of the current sleep state and the driving state at the level of the driving state when the level is equal to or higher than the sleeping state. Therefore, it is possible to set notification information that is more addictive and has a tendency than a conventional system that performs notification from the sleep state and the driving state only on the day of driving.

  Hereinafter, the setting of the notification information when the sleep state is at the “bad” level will be described. Based on the latest sleep state information, the notification information setting unit 7 acquires from the driving level map 6 what kind of driving state the sleep state is equal to or greater than the sleep state indicated in the sleep state information. The same applies to the points. However, when the sleep level is “slightly bad”, the level higher than the level is only “good”, whereas when the sleep level is “bad”, the level There are two levels “good” and “slightly bad” above. Therefore, in order to set appropriate notification information, it is necessary to consider how the level of the driving state is in each of the two upper levels of the sleeping state. Therefore, the second determination condition is applied in addition to the first determination condition described above.

  FIG. 9 is a correspondence diagram showing first determination conditions for determining notification information. As shown in FIG. 9, four discrimination numbers are determined according to the second determination condition. That is, when the sleep state is “slightly bad” and the driving state is “good”, the discrimination number is “1”. If the sleep state is a “slightly bad” level and the driving state is a “slightly bad” level, the discrimination number is “2”. If the sleep state is a “slightly bad” level and the driving state is a “bad” level, the discrimination number is “3”. In the driving level map 6, when there is no sample corresponding to the “slightly bad” sleep state, the determination number is “4”.

  First, as shown in FIG. 6, a case where the level of the driving state acquired from the driving level map 6 at the level of “bad” sleeping state is “good” will be described. First, the determination is made based on the first determination condition shown in FIG. 7, and then the determination is made based on the second determination condition shown in FIG. Then, appropriate notification information is acquired and set from the notification information lists 4 to 7 shown in FIG. 10 based on the determination number determined based on the second determination condition. FIG. 10 is a correspondence diagram showing notification information applied when the sleep state level is “bad” and the driving state level is “good”. Shading in the figure will be described later.

  As shown in FIG. 10, when the level of the driving state acquired from the driving level map 6 is “good” when the sleep state is “bad”, all “driving warning A” is used as the notification information. Is set. In other words, even though the sleep state level is “bad”, the driving state level is “good”, so there is no concern about the decrease in the driving state level due to the decrease in the sleeping state level, and normal good driving A message that prompts the user to continue the operation is set as notification information.

  Next, the case where the level of the driving state acquired from the driving level map 6 at the level of “bad” sleeping state is “somewhat bad” will be described. FIG. 11 is a correspondence diagram showing notification information applied when the sleep state level is “bad” and the driving state level is “somewhat bad”. Shading in the figure will be described later.

  When it is determined that the determination number is “1” based on the first determination condition, the level of the driving state is changed from “good” to “bad” because the level of the sleeping state is decreased from “good” to “bad”. Therefore, it is considered that the decrease in the sleep state level affects the decrease in the driving state level. Therefore, when it is determined that the determination number is “1” based on the first determination condition, as shown in the notification information list 8 of FIG. 11, “Dozing warning A” or “Dozing warning A ′” is used as the notification information. Is set. Here, as described above, the “sleeping warning A” is, for example, a message “Because the sleeping state is a little worse, please pay more attention to driving than usual.” The “sleeping warning A ′” is, for example, a message “Because the sleep state is bad, please pay more attention to driving than usual.”

  Specifically, when it is determined that the determination number is “1” based on the second determination condition shown in FIG. 9, “Dozing warning A” is selected, and the determination numbers “2”, “3”, “4” are selected. "Is a doze warning A '" is selected. When the discrimination number is “1”, the driving state level is “good” whether the sleep state level is “good” or “slightly bad”. And, when the sleep state level becomes “bad”, the driving state level is lowered to “slightly bad” for the first time. Therefore, a decrease in the level of the sleep state that affects the driving state is considered “a little”, and “slumber warning A” is set.

  On the other hand, when the determination number is “2” based on the second determination condition, the driving state level is “good” when the sleeping state level is “good”, and the sleeping state level is “slightly bad”. "At the time, the driving state level is" slightly bad ". When the sleep state level is “bad”, the driving state level is “slightly bad”. There is no reduction in the driving state level when the sleep state level drops from “slightly bad” to “bad”, but it is already driven when the sleep state level drops from “good” to “slightly bad” The state level is low. In this regard, it can be seen that the level of the driving state is decreasing earlier than the above example where the determination number is “1” based on the second determination condition. Therefore, it is preferable to call attention to a decrease in driving quality accompanying a decrease in sleep quality a little stronger than in the above example. Therefore, “sleeping warning A ′” is set as the notification information.

  When the discrimination number is “3” based on the second discrimination condition, when the sleep state level is “good”, the driving state level is “good”, and when the sleep state level is “slightly bad” The driving condition level is “bad”. When the sleeping state level is "bad", the driving state level is picking up to "slightly bad", so that the driving state level is directly reduced due to a decrease in the sleeping state level I can not say. However, when the sleep state level decreases from “good” to “slightly bad”, the driving state level significantly decreases from “good” to “bad”. The notification is preferably directed in a safer direction, and therefore it is preferable to strongly call attention to a decrease in driving quality accompanying a decrease in sleep quality. Therefore, “sleeping warning A ′” is set as the notification information. The same applies to the case where the number of samples is small and the determination number is “4” based on the second determination condition.

  When it is determined that the determination number is “2” based on the first determination condition, even if the sleep state level decreases from “good” to “bad”, the driving state level changes from “slightly bad” to “slightly”. The current status of “bad” is maintained. For this reason, the influence of the fall of the level of a sleep state is discriminate | determined based on 2nd discrimination | determination conditions, and alerting | reporting information is selected and set from the alerting | reporting information list 9 shown in FIG.

  When the discrimination number “1” is determined based on the second determination condition, when the sleep state level is “slightly bad”, the driving state level is “good”, and when the sleep state level is “bad” The level of the driving state is “slightly bad”. Since the decrease in the sleep state has an influence on the decrease in the driving state level, the “sleeping warning A” is set.

  When it is determined that the determination number is “2” based on the second determination condition, the driving state level is “slightly bad” when the sleep state level is “good” and “slightly bad”, and the sleep state Even when the level of the vehicle is “bad”, the level of the driving state is “somewhat bad”. Since the decrease in the sleep state level does not affect the decrease in the driving state level, “driving warning B” is set.

  When the determination number “3” is determined based on the second determination condition, when the sleep state level is “slightly bad”, the driving state level is “bad”, and when the sleep state level is “bad” The level of the driving state is picking up to “slightly bad”. Since the decrease in the sleep state level does not affect the decrease in the driving state level, “driving warning B” is set. The same applies to the case where the number of samples is small and the determination number is “4” based on the second determination condition.

  When it is determined that the determination number is “3” based on the first determination condition, when the sleep state level is decreased from “good” to “bad”, the driving state level is changed from “bad” to “slightly bad”. Is picking up. For this reason, it is determined that the decrease in the sleep state level does not directly affect the driving state level. Accordingly, as shown in the notification information list 10 of FIG. 11, “driving warning B” is set regardless of the discrimination number in the second discrimination condition.

  When it is determined that the determination number is “4” based on the first determination condition, it is not possible to consider the effect when the level of the sleep state decreases from “good” to “bad”. For this reason, the influence of the fall of the level of a sleep state is discriminate | determined based on 2nd discrimination | determination conditions, and alerting | reporting information is selected and set from the alerting | reporting information list 11 shown in FIG. Since the broadcast information is set exclusively based on the second determination condition, the broadcast information list 11 is the same as the broadcast information list 9 described above. Therefore, detailed description is omitted here.

  Next, a case where the level of the driving state acquired from the driving level map 6 at the level of “bad” sleeping state is “bad” will be described. FIG. 12 is a correspondence diagram showing notification information applied when the sleep state level is “bad” and the driving state level is “bad”. Shading in the figure will be described later.

  When it is determined that the determination number is “1” based on the first determination condition, the level of the driving state is “bad” from “good” because the level of the sleeping state is decreased from “good” to “bad”. Therefore, it is considered that the decrease in the sleep state level greatly affects the decrease in the driving state level. Therefore, when the determination number “1” is determined based on the first determination condition, as shown in the notification information list 12 of FIG. 12, “Dozing Warning D”, “Dozing Warning D ′”, or “Dozing Warning” E "is set as broadcast information.

  Here, the “slumber warning D” is, for example, a message “Due to a poor sleep state, a considerable drop in driving ability is observed. Please refrain from driving for a long time today.” In addition, the “sleeping warning D ′” is, for example, a message “Your driving ability tends to decrease due to poor sleep. Please refrain from driving for a long time today.” Further, the “sleeping warning E” is, for example, a message such as “sleeping condition is bad and driving ability is low. Please pay attention to driving and refrain from driving for a long time today”.

  Since the application of each piece of notification information based on the second determination condition is the same as in the above-described example, detailed description thereof is omitted.

  When it is determined that the determination number is “2” based on the first determination condition, the level of the driving state is changed from “slightly bad” to “bad” because the level of the sleeping state is decreased from “good” to “bad”. Therefore, it is considered that the decrease in the sleep state level affects the decrease in the driving state level. Therefore, when it is determined that the determination number is “2” based on the first determination condition, as shown in the notification information list 13 of FIG. 12, “Dozing Warning D” or “Dozing Warning D ′” is used as the notification information. Is set. Since the application of each piece of notification information based on the second determination condition is the same as in the above-described example, detailed description thereof is omitted.

  When the determination number “3” is determined based on the first determination condition, even when the sleep state level is decreased from “good” to “bad”, the driving state level is “bad” to “bad”. The current status is maintained. Therefore, the notification information is selected and set from the notification information list 14 shown in FIG. 12 by determining the influence of the decrease in the sleep state level exclusively based on the second determination condition.

  When it is determined that the determination number is “1” or “2” based on the second determination condition, the level of the driving state is “good” because the level of the sleep state is lowered from “somewhat bad” to “bad”. ”Or“ slightly bad ”to“ bad ”, it is considered that the decrease in the sleep state level affects the decrease in the driving state level. Therefore, when the determination number is “1” or “2” based on the second determination condition, as shown in the notification information list 14 of FIG. 12, “Dozing warning D” or “Dozing warning D ′”. Is set as broadcast information.

  On the other hand, when the determination number “3” is determined based on the first determination condition, the driving state level is “bad” even when the sleep state level decreases from “slightly bad” to “bad”. The current status of “bad” is maintained. Accordingly, as shown in the notification information list 14 of FIG. 12, “driving warning C” is set as the notification information. The same applies to the case where the number of samples is small and the determination number is “4” based on the second determination condition.

  When it is determined that the determination number is “4” based on the first determination condition, it is not possible to consider the effect when the level of the sleep state decreases from “good” to “bad”. For this reason, the influence of the fall of the level of a sleep state is discriminate | determined exclusively based on 2nd discrimination | determination conditions, and alerting | reporting information is selected and set from the alerting | reporting information list 15 shown in FIG. Since the broadcast information is set exclusively based on the second determination condition, the broadcast information list 15 is the same as the broadcast information list 14 described above. Therefore, detailed description is omitted here.

  Thus, the notification information is set based on the driving state at the level of the current sleep state and the driving state at the level of the driving state when the level is equal to or higher than the sleeping state. Therefore, it is possible to set notification information that is more addictive and has a tendency than a conventional system that performs notification from the sleep state and the driving state only on the day of driving. In addition, when there are multiple levels of sleep states higher than the level of the current sleep state, as described above, the steps are sequentially performed from the comparison with the level of the driving state at the level of the higher sleep state. .

  In each frame shown in FIG. 3, when the number of samples is less than a predetermined number (predetermined lower limit individual sample number), for example, less than 10, the accuracy of the driving level map 6 May be low. If the notification information is set based on the driving level map 6 with such a low accuracy, there is a possibility that the accurate notification information cannot be set. Thus, in this way, when the number of samples in each frame of the driving level map 6 is less than the predetermined number, instead of the notification information list shown in FIGS. 8 and 10 to 12, FIGS. 13 to 16 are used. It is preferable to use the notification information list shown in FIG. Specifically, in FIGS. 8 and 10 to 12, the notification information indicated by shading is changed in FIGS. 13 to 16, and the other notification information is the same. The notification information of the shaded portion in FIGS. 13 to 16 is set including the caution regarding the sleep driving regardless of the difference in the level of the driving state due to the difference in the level of the sleeping state.

  The determination as to whether or not the predetermined lower limit individual sample number is satisfied is performed for all the frames to be compared in the operation level map 6. One is a frame in which the level of the driving state corresponding to the level of the sleep state indicated in the latest sleep state information acquired via the information transmission unit 9 is shown. The second is a frame in which the driving state level corresponding to the sleeping state level equal to or higher than the sleeping state level is shown. There may be a plurality of frames. For example, when the sleep state level indicated in the latest sleep state information is “bad”, the sleep state level equal to or higher than the sleep state level includes “slightly bad” and “good”. . Therefore, a frame corresponding to “slightly bad” and “good” sleep level is a comparison target. When the number of samples in the frame to be compared is less than a predetermined number (lower limit individual sample number), for example, less than 10, there is a possibility that the accuracy of the driving level map 6 is low.

  When the number of samples is small, it is difficult to clearly define the influence of the decrease in the sleep state level on the driving state level. Therefore, based on a general influence that a decrease in the level of the sleep state is assumed to have on the level of the driving state, the “sleeping warning” is set as the notification information. Specifically, “Dozing Warning Aa”, “Dozing Warning Ba”, “Dozing Warning Ca”, and “Dozing Warning Da” are set.

  “Dozing alert Aa” is, for example, a message “Because sleep is not so good, let's be careful about driving.” “Dozing Warning A” is, for example, the message “Be careful about driving more than usual because sleep is a little worse.” Emphasize “sleep state” and pay more attention to driving. It is an expression to encourage.

  “Dozing warning Ba” is, for example, a message “Driving condition is low, so driving ability decreases. Please drive carefully.” “Dozing Warning B” is, for example, the message “Sleep is a little worse, so driving ability will decrease. Please drive carefully.” Emphasize “sleep state” and drive more It is an expression that calls attention to.

  “Dozing alert Ca” is, for example, a message “Due to poor sleep state, a decrease in driving ability is predicted. Pay special attention to driving today.” “Dozing Warning C” is, for example, a message saying “Since the sleep state is a little worse, there is a considerable tendency to reduce driving ability. Please drive with special care today. It is an expression that emphasizes "sleep state" and encourages attention to driving.

  The “sleeping warning Da” is, for example, a message “Your sleep state is poor and driving ability is expected to decline. Pay special attention to driving today and refrain from driving for as long as possible.” The “sleeping warning D” is, for example, a message “Your driving ability has dropped significantly due to poor sleep. Please refrain from driving for a long time today.” "Is emphasized, and it is an expression that calls attention to driving more.

  In addition, as described above, the driving level map 6 is set based on the sleep state information and driving state information of the past three months as an example, but the number of samples is very small when the vehicle is not used for a long period of time. There is a case. In such a case, since the relevance between the sleep state and the driving state is insufficient, it is preferable that the notification information is set based only on the sleep state. That is, when the total number of samples is less than the predetermined lower limit total number of samples, it is preferable that the notification information is set based only on the sleep state. The total number of samples is, for example, the total number of pairs of sleep state information and driving state information that are collected over a predetermined collection period of, for example, three months and indicate the correlation between the sleep state level and the driving state level. As a specific example, 69 is the total number of samples in the nine frames of the driving level map 6 of FIG. When the total number of samples is less than a predetermined lower limit total number of samples, for example, less than 10, the notification information is provided according to the sleep state level indicated in the latest sleep state information regardless of the driving level map 6. Is set.

  When the level of the sleep state is “good”, for example, a message “Good sleep has been obtained. Try to drive safely today.” Is set as the notification information. In addition, when the sleep state level is “slightly bad”, for example, a message “Because the sleep state is a little bad, so be careful about driving more than usual.” Is set as notification information. In addition, when the sleep state level is “bad”, for example, a message “Because sleep state is bad, pay special attention to driving today” is set as notification information.

  In addition, the notification information setting unit 7 changes the correspondence of the driving state level to the sleeping state level in the driving level map 6 set based on information collected over a predetermined collection period of, for example, three months. It is preferable to check periodically as a characteristic change. That is, it is preferable to determine whether or not the level of the driving state is decreasing in a predetermined check period shorter than the predetermined collection period, for example, every month. And when the level of a driving | running state has shifted | deviated with respect to the level of a sleep state, it is suitable to add notification information which is illustrated below further to the notification information mentioned above.

[When sleep level is "good"]
[Operating state level is reduced by "1 level"]
“There is a decline in driving ability compared to the previous time.”
[Operating state level is reduced by "2 levels"]
“There is a significant decrease in driving ability compared to the previous time.”
[Driving level increases by "1 level"]
“The driving ability is improved compared to the previous time.”
[Driving level increases by "2 levels"]
“The driving ability is greatly improved compared to the previous time.”
[When sleep level is "Slightly bad"]
[Operating state level is reduced by "1 level"]
“If you get a little worse than before, you will see a drop in your driving ability.”
[Operating state level is reduced by "2 levels"]
“If you get a little worse than before, you will see a significant drop in your driving ability.”
[Driving level increases by "1 level"]
“Even though sleep is a little worse than last time, driving ability can be improved.”
[Driving level increases by "2 levels"]
“Despite a little worse sleep than last time, we can see a significant improvement in driving ability.”
[When sleep level is "bad"]
[Operating state level is reduced by "1 level"]
“If you fall asleep compared to the previous time, you will see a decline in driving ability.”
[Operating state level is reduced by "2 levels"]
“If you fall asleep compared to the previous time, you will see a significant drop in driving ability.”
[Driving level increases by "1 level"]
“Even though sleep is worse than last time, driving performance is improved.”
[Driving level increases by "2 levels"]
“Even if sleep worsens compared to the previous time, the driving ability is greatly improved.”

  The ECU (electronic control unit) of the vehicle that has received the notification information as described above may notify the message based on the notification information by voice through the speech synthesizer or display it as character information on the display in the vehicle. Can do. Also, another message that prompts a break can be notified by voice or text based on the notification information. Moreover, you may alert | report with respect to the vehicle 30 not only to such alerting | reporting with respect to a passenger | crew. That is, the notification information can be used for various controls of the vehicle 30. For example, the temperature of the room is lowered by adjusting the air conditioner, and the oxygen concentration is raised by ventilation. The ventilation includes control for changing the indoor circulation mode to the outside air introduction mode. Further, the maximum speed may be limited or acceleration may be limited. Furthermore, the sensitivity of other driving assistance devices such as an automatic brake device may be increased, or the sensitivity of the dozing detection device may be increased.

  In the above-described driving warnings A to C and dozing warnings A to E, the level of A that requires the most attention is low, and the level that requires attention increases as B and C progress. In the case of a dozing warning, since attention is required during driving from the dozing warning A to E, notification may be made early according to the type of the dozing warning. For example, when notification (driving warning or dozing warning) is performed based on the notification information one hour after the start of driving, the following is preferable. In the case of the dozing alarm A (A ', Aa), the dozing alarm is performed 50 minutes after the start of driving. In the case of the dozing warning B (B ', Ba), the dozing warning is performed 40 minutes after the start of driving. In the case of the dozing alarm C (C ', Ca), the dozing alarm is performed 30 minutes after the start of driving. In the case of the dozing warning D (D ′, Da), the dozing warning is performed 20 minutes after the start of driving. In the case of the dozing warning E, the dozing warning is performed 10 minutes after the start of driving.

  Furthermore, the notification information setting unit 7 changes the level of the sleep state indicated in the sleep state information received in a predetermined number of consecutive days in the past from the date of receiving the latest sleep state information below a predetermined lower limit sleep state. If it is, information that prompts to refrain from driving is included in the notification information regardless of the driving level map. Specifically, the notification information setting unit 7 displays the driving level map 6 when the sleep state for the past several days, for example, three days, has transitioned to “bad” which is the lowest level (lower limit sleep state). It is preferable to prioritize and set other notification information as shown below. For example, it is preferable to set the following message as notification information (sleeping warning F). Note that the sleep state level “bad” may be applied as it is, or the lower limit sleep state may be set according to a quantitative value classified as “bad”. As described above, when the quantitative value when classified as “bad” is less than 50 points, the lower limit sleep state may be set to less than 30 points.

[Sleep level: “Poor”, Driving state level: “Good”]
Dozing warning F1: “The period of poor sleep was 3 consecutive days. The driving level is high, but there is a possibility that it may be hindered driving. Please refrain from driving for a long time.”
[Sleep level: “Poor”, Driving level: “Slightly bad”]
Doze warning F2: “The period of poor sleep is three consecutive days. Be careful when driving. Please refrain from driving for a long time.”
[Sleep level: “Poor”, Driving level: “Poor”]
Doze warning F3: “The period of poor sleep has been three days in a row. Driving is very careful. Please refrain from driving.”

  As described above, the first letter of the alphabet of the driving warning and the dozing warning is such that “A” is the lowest level of caution and increases as “B” and “C” are advanced. That is, the first letter of the alphabetic subscript provided for the driving warning and the dozing warning corresponds to the notification level in the notification information. As described in detail above, the notification information setting unit 7 has notifications having a plurality of different notification levels based on the driving level map 6 and the latest sleep state information acquired via the information transmission means 9. Set the information.

  The broadcast information setting unit 7 can add further notes to the broadcast information based on the broadcast level of the broadcast information set by itself. It has been verified that humans generally have time zones that commonly cause sleepiness. Between 3 am and 5 am, and between 2 pm and 4 pm correspond to the time zone (warning time zone). Therefore, the notification information setting unit 7 acquires time information from a clocking means (not shown) (a radio clock, a general quartz clock, a GPS (global positioning system), etc.), and further adds the following notification to each notification information. It is preferable to add information. The notification information is preferably set when driving is started in the time zone or when entering the time zone during driving.

[When driving warning is set]
“It ’s a time of sleepiness. Sleep is fine, but be careful when driving.”
[When dozing alarms A, B, and C are set]
“It ’s a time of sleepiness. Do n’t drive for more than an hour because your sleep is a little worse.”
[When dozing alarms D, E, and F are set]
“It is a time of sleepiness. Please refrain from driving for a long time because of poor sleep. If you are driving continuously for more than 30 minutes, take a break.”

  As described above, the notification information setting unit 7 is set according to the notification level when the vehicle 30 starts to be driven in a predetermined warning time period in which physiological drowsiness is likely to occur and when the vehicle is continuously driven. The notification information can be set by adding caution information regarding sleepiness.

  As described above, according to the present invention, it is possible to monitor the daily driving state of the occupant and the daily sleeping state of the occupant without providing a special sensor for detecting the occupant's biological information on the vehicle side. Thus, it is possible to provide a safe driving support system that works on one or both of the occupant and the vehicle, prevents accidents, and supports safe driving.

The block diagram which shows typically the structural example of the safe driving assistance system which concerns on this invention Explanatory drawing which shows an example of a driving level map typically Explanatory drawing which shows an example mapped by the driving level map shown in FIG. Correspondence diagram showing the relationship between the sleep state shown in the latest sleep state information, the driving state of the driving level map corresponding to the sleeping state, and the notification information set at that time (when the sleeping state is “good” Correspondence diagram) Correspondence diagram showing the relationship between the sleep state shown in the latest sleep state information, the driving state of the driving level map corresponding to the sleep state, and the notification information set at that time (sleep state is “somewhat bad” Case correspondence diagram) Correspondence diagram showing the relationship between the sleep state shown in the latest sleep state information, the driving state of the driving level map corresponding to the sleep state, and the notification information set at that time (when the sleep state is "bad" Correspondence diagram) Correspondence diagram showing the first determination condition for determining the notification information Correspondence diagram showing notification information applied when the level of sleep state is "slightly bad" Corresponding diagram showing the second determination condition for determining the notification information Corresponding diagram showing notification information applied when the sleep state level is "bad" and the driving state level is "good" Corresponding diagram showing notification information applied when the sleep state level is "bad" and the driving state level is "somewhat bad" Corresponding diagram showing notification information applied when the sleep state level is "bad" and the driving state level is "bad" Correspondence diagram showing notification information corresponding to FIG. 8 when the number of samples is less than the individual lower limit number of samples Correspondence diagram showing notification information corresponding to FIG. 10 when the number of samples is less than the number of individual lower limit samples Correspondence diagram showing notification information corresponding to FIG. 11 when the number of samples is less than the individual lower limit number of samples Correspondence diagram showing notification information corresponding to FIG. 12 when the number of samples is less than the number of individual lower limit samples

Explanation of symbols

2: Sleep state calculation unit 5: Driving level setting unit 6: Driving level map 7: Notification information setting unit 10: Safe driving support system 30: Vehicle

Claims (9)

A safe driving support system for monitoring a driving state of a daily vehicle by an occupant and a daily sleeping state of the occupant and notifying one or both of the occupant and the vehicle and supporting safe driving. ,
A sleep state calculation unit that calculates sleep state information indicating a sleep state including the quality of sleep based on biological information detected during sleep;
A driving state calculation unit that calculates driving state information indicating a driving state including driving quality based on the behavior of the vehicle detected during traveling;
A driving level setting unit that acquires the sleep state information and the driving state information, and sets a driving level map indicating a correlation between the level of the sleeping state and the level of the driving state based on the history of the both information;
A safe driving support system comprising: a notification information setting unit configured to set notification information having a plurality of different notification levels based on the driving level map and the latest sleep state information acquired via the information transmission unit. .   The safe driving support system according to claim 1, wherein the driving level setting unit sets the driving level map based on the sleep state information and the driving state information acquired during a predetermined past collection period.   The notification information setting unit is collected over the predetermined collection period, and the total number of samples of the sleep state information and the driving state information pair indicating the correlation between the sleep state level and the driving state level is a predetermined number. 3. The safe driving support system according to claim 2, wherein when the total number of samples is less than the lower limit, the notification information is set according to a sleep state level indicated in the latest sleep state information regardless of the driving level map.   The notification information setting unit is configured such that a correspondence relationship between a driving state level and a sleeping state level in the driving level map set based on information collected over the predetermined collection period is reduced. It is determined for each predetermined check period shorter than the predetermined collection period whether or not it is moving in the direction, and if it is determined that the level of the driving state is decreasing, the level of the driving state tends to decrease The safe driving support system according to any one of claims 2 and 3, wherein the information is set by being included in the notification information.   The notification information setting unit corresponds to the level of the driving state corresponding to the level of the sleep state indicated in the latest sleep state information acquired via the information transmission unit and the level equal to or higher than the level of the sleep state. The level of the driving state to be obtained is acquired from the driving level map, and the notification information is set based on the difference in the level of the driving state due to the difference in the level of the sleeping state. Safe driving support system.   In the case where the driving state level is reduced in accordance with the decrease in the sleep state level, the notification information setting unit includes the caution regarding dozing driving in the notification information, regardless of the decrease in the sleep state level. 6. The safe driving support system according to claim 5, wherein when there is no difference in state level, the notification information is set in the notification information without including a caution regarding sleep driving.   The notification information setting unit includes a driving state level corresponding to a sleep state level indicated in the latest sleep state information acquired via the information transmission means, and a sleep state level equal to or higher than the sleep state level. When the number of samples in the driving level map corresponding to at least one of the driving state level corresponding to the level is less than the predetermined lower limit individual sample number, the difference in the driving state level due to the difference in the sleeping state level The safe driving support system according to claim 6, wherein the notification information is set by including in the notification information a caution regarding a drowsy driving.   The notification information setting unit is configured such that the level of the sleep state indicated in the sleep state information received in a predetermined number of consecutive days in the past from the date of receiving the latest sleep state information transitions below a predetermined lower limit sleep state. If it is, the safe driving support system according to any one of claims 1 to 7, wherein information for prompting to refrain from driving is included in the notification information regardless of the driving level map.   The notification information setting unit is a note regarding sleepiness that is set according to the notification level when driving the vehicle and continuing driving during a predetermined warning time period that is physiologically prone to sleepiness The safe driving support system according to any one of claims 1 to 8, wherein the notification information is set by adding information.

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