JP2020067711A - Warning notification device and warning notification method - Google Patents

Abstract

To provide "a warning notification device and warning notification method" for allowing a user to recognize occurrence of a dangerous state during driving while restricting the user from having troublesomeness with respect to the warning.SOLUTION: A warning notification device 1 performs notification of warning when a warning object event at a level equal to or more than a threshold level occurs, for a predetermined period including a period for driving a vehicle, monitors whether a warning object event at a level lower than the threshold level has occurred so as to record monitoring result information indicating a monitoring result, and provides information based on the monitoring result at subsequent timing. Thus, the device never performs notification of warning due to a warning object event at a level lower than the threshold level in realtime, but provides information based on the event afterward.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a warning notification device and a warning notification method, and is particularly suitable for use in a warning notification device and a warning notification method that output a warning regarding a warning target event that affects the risk of driving a vehicle.

  Conventionally, based on the driver's driving situation (frequency of looking aside, danger of falling asleep, etc.) and the driving situation of the vehicle (distance between vehicles, meandering, etc.), a warning is given to the driver to inform the driver. There is known a warning notification device that calls attention. Regarding this type of warning notification device, Patent Document 1 discloses that when the risk level of an event to be a warning reaches a second warning level with high urgency, a warning is immediately output, while When the first warning level is low, the technique that outputs a warning only when the event continues for a predetermined number of times is described. According to the technique described in Patent Document 1, it is possible to prevent the warning effect from being reduced due to the driver's familiarity and annoyance with the warning.

Japanese Patent Laid-Open No. 10-198898

  As suggested in Patent Document 1, if the warning by the warning notification device is issued too frequently, or if the warning is output in a situation that is not necessary for the driver, the driver will feel annoyed, and the warning will be issued. May be ignored, or the warning function itself may be turned off. According to the technique of Patent Document 1, since a low-urgency warning is output only when the condition is satisfied, it is possible to reduce the number of times the low-urgency warning is output, but the condition is satisfied. When a situation occurs frequently, a warning is frequently output in real time, and there is room for improvement in that the annoyance felt by the user is reduced. In order to improve this point, if only the action of not outputting a low urgency warning is taken, the user will not be able to recognize that a dangerous situation has occurred during driving, There is room for improvement in this respect.

  The present invention has been made to solve such a problem, and in a case where a dangerous situation has occurred during driving while suppressing the user's annoyance to the warning. Aims to make it visible to the user.

  In order to solve the above-mentioned problem, in the present invention, during a predetermined period during which the vehicle is driven, it is monitored whether or not a warning target event having a level equal to or higher than a threshold level occurs, and the level of the threshold level or higher is monitored. When a warning target event occurs, a warning corresponding to the level is notified, and at least one level lower than the threshold level among the warning target events having a level lower than the threshold level for a predetermined period. Whether or not an event has occurred is monitored, and monitoring result information indicating the monitoring result is recorded. Then, based on the recorded monitoring result information at a predetermined timing after a predetermined period, if the warning target event of the level to be monitored occurs in a predetermined mode, the information based on the monitoring result is displayed. provide.

  According to the present invention configured as described above, during the predetermined period in which the vehicle is driven, the warning is not output in real time for the warning target event having the level lower than the threshold level. It is possible to prevent the user from feeling annoyed by the warning. Moreover, according to the present invention, whether or not a warning target event having a level smaller than the threshold level has been monitored for a predetermined period, and in a predetermined case, the monitoring result is ex post facto. Based information is provided to the user. For this reason, the user is not completely aware that a warning target event with a level lower than the threshold level has occurred, that is, that a dangerous situation has occurred during driving, and the information provided after the fact does not exist. Based on this, we can recognize this.

It is a block diagram showing an example of functional composition of a warning information device concerning this embodiment. It is a figure used for description of the level of the distance between vehicles at the time of running, and the level of looking aside. It is a figure which shows an example of the content of inter-vehicle distance log data. It is a figure used for description of the content of the 1st message. It is a flowchart which shows the operation example of the alerting | reporting apparatus which concerns on this embodiment.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a functional configuration example of a warning notification device 1 according to the present embodiment. The warning notification device 1 is a device provided in a vehicle and has a function of outputting a warning to a driver in a predetermined case described later. Hereinafter, the vehicle in which the warning notification device 1 is mounted is referred to as “own vehicle”.

  As shown in FIG. 1, a voice processing device 2, a touch screen 3, an inter-vehicle distance detection sensor 4, and an in-vehicle camera 5 are connected to the warning notification device 1. The audio processing device 2 includes a D / A converter, a volume, an amplifier, a speaker provided in the vehicle, D / A-converts an input audio signal, amplifies it, and then outputs audio based on the audio signal from the speaker. Output. The touch screen 3 is disposed on a display such as a dashboard of a vehicle or a center console where a driver on board the vehicle can visually recognize it, and is arranged so as to overlap the display, and detects a touch operation on a display area of the display. It is equipped with a touch panel.

  The inter-vehicle distance detection sensor 4 is a sensor used to detect the inter-vehicle distance between the host vehicle and another vehicle located in front of the host vehicle, and in the present embodiment, radar for distance measurement (laser radar, Millimeter wave radar, etc.). However, the inter-vehicle distance detection sensor 4 may be any sensor that can be used to detect the inter-vehicle distance, and for example, a camera that images the front of the vehicle can be used as the inter-vehicle distance detection sensor 4. In this case, the inattentive detection unit 12, which will be described later, detects the inter-vehicle distance based on the shooting result of the camera. The in-vehicle camera 5 is a camera provided at a position where the driver's face sitting in the driver's seat can be photographed in the vehicle, and photographs the driver's face sitting in the driver's seat.

  As shown in FIG. 1, the warning notification device 1 has, as a functional configuration, a voice output unit 10, a running distance detection unit 11, an inattentive detection unit 12, a warning notification unit 13, a threshold level setting unit 14, and a monitoring information recording unit. 15 and an information providing unit 16. Each of the functional blocks 10 to 16 can be configured by any of hardware, DSP (Digital Signal Processor), and software. For example, when configured by software, each of the functional blocks 10 to 16 is actually configured by including a CPU, RAM, ROM, etc. of a computer, and a program stored in a recording medium such as RAM, ROM, hard disk or semiconductor memory. Is realized by operating.

  As shown in FIG. 1, the warning notification device 1 includes a storage unit 17 as a storage unit. The storage unit 17 is configured to include a hard disk and a non-volatile storage medium such as an EEPROM, and stores various information. In the storage unit 17, inter-vehicle distance log data 18 and inattentive log data 19 are stored.

  The voice output unit 10 outputs a voice signal to the voice processing device 2 and causes a speaker to emit a voice corresponding to the voice signal.

  When the host vehicle is traveling at a speed equal to or higher than a predetermined speed (for example, 30 km / h), the running distance detection unit 11 detects the distance between the host vehicle and the host vehicle based on the detection value of the sensor 4 for detecting the headway distance. An inter-vehicle distance with another vehicle located in front of the vehicle is detected. Hereinafter, the inter-vehicle distance between the host vehicle and another vehicle located in front of the host vehicle when the host vehicle is traveling at a speed equal to or higher than a predetermined speed is particularly referred to as "traveling inter-vehicle distance". In the present embodiment, the running distance detection unit 11 monitors the speed of the host vehicle based on the detection value of a vehicle speed sensor (not shown). The running-vehicle distance detecting unit 11 detects the running-vehicle distance at a predetermined cycle (for example, a cycle of 100 milliseconds) while the vehicle is running at a speed equal to or higher than a predetermined speed. Information indicating the running distance is output to the warning notification unit 13 and the monitoring information recording unit 15.

  The inattentive detection unit 12 detects "inattentiveness" of the driver based on the captured image data generated by the in-vehicle camera 5. In the present embodiment, the inattentiveness is defined to be the highest risk "Owakisaw", the lowest risk "Owakisaw", and the risk "Middle Wakisaw" between the large Wakisawa and the Small Wakisawa. ing. When the inattentive detection unit 12 detects that the driver has performed an inattentive look, the inattentive look, the inward look, and the insignificant look are considered in consideration of the length of the inattentive period, the size of the deviation of the line of sight, and the like. Judge the look. The inattentive detection unit 12 analyzes the captured image data, which is generated by the in-vehicle camera 5 and in which the face of the driver is recorded, by the existing image recognition technology, and at the same time, the traveling condition of the own vehicle (speed of the own vehicle, etc.). Reflecting the environment around the vehicle or the like (whether or not it is an intersection, etc.), detection of inattentiveness and determination of large inattentiveness, middle inattentiveness and small inattentiveness are executed. The inattentive detection unit 12 appropriately recognizes the traveling state of the own vehicle and the environment around the own vehicle based on the detection value of a sensor (not shown). In addition, detection of the inattentiveness by the inattentiveness detection unit 12 and determination of the large inattentiveness, the middle inattentiveness, and the small inattentiveness may be performed by any method. For example, a sensor other than the in-vehicle camera 5 may be used. Well, artificial intelligence technology may be used for image recognition.

  The inattentiveness detection unit 12 monitors whether or not the inattentiveness is continuously performed during a period after the power source of the device body of the warning notification device 1 is turned on and before being turned off, and the inattentiveness is performed. Is detected, it is determined whether the inattentive look is a large inattentive look, a middle inattentive look, or a small inattentive look. Then, the inattentiveness detection unit 12 outputs information indicating the determination result (hereinafter, referred to as “inatariness determination result information”) to the warning notification unit 13 and the monitoring information recording unit 15. Hereinafter, a period from when the power of the device body of the warning notification device 1 is turned on to when it is turned off is referred to as a “power-on period”.

  During the power-on period, the warning notification unit 13 monitors whether the level of the inter-vehicle distance during traveling is any level higher than the inter-vehicle distance threshold level set by the method described later. Then, when the level of the inter-vehicle distance during traveling becomes any level equal to or higher than the inter-vehicle distance threshold level, the warning notifying unit 13 notifies the warning corresponding to the level. Further, during the power-on period, the warning notification unit 13 monitors whether or not the driver looks aside at a level higher than the threshold level set by the method described below. Then, when the driver performs the inattentive at any level equal to or higher than the inattentive threshold level, the alert informing unit 13 issues an alert corresponding to the level. Hereinafter, regarding the processing of the warning notifying unit 13, the processing of notifying a warning regarding the inter-vehicle distance during traveling and the processing of notifying a warning regarding the inattentiveness will be sequentially described.

<Processing for issuing warning regarding inter-vehicle distance during traveling>
FIG. 2A is a diagram used for explaining the level of the inter-vehicle distance during traveling and other related matters. In the present embodiment, from the viewpoint of the degree of danger, the range of the value of the inter-vehicle distance during traveling can be set to a high level of danger (inter-vehicle distance), a medium level of risk (inter-vehicle distance), and a low level of risk (inter-vehicle distance). ) Three levels are set. As shown in FIG. 2 (A), the high risk level (inter-vehicle distance) is "X1 meters", the medium risk level (inter-vehicle distance) is "X2 meters" (where X2> X1), and The smallness level (inter-vehicle distance) is "X3 meters" (where X3> X2). Further, as will be described later, the driver (which may be another person, but in this embodiment is a driver) has a high risk level (inter-vehicle distance), a medium risk level (inter-vehicle distance), and , One of the three levels of low risk level (inter-vehicle distance) is designated as the inter-vehicle distance threshold level.

  Note that X1, X2, and X3 are dynamically assigned appropriate values according to the traveling speed of the vehicle.

  Then, during the power-on period, the warning notifying unit 13 determines, based on the information input from the running-vehicle distance detecting unit 11, that the running-vehicle distance is at a level equal to or higher than the inter-vehicle distance threshold level (the inter-vehicle distance threshold level (Including) is monitored. For example, when the inter-vehicle distance threshold level is set to the high risk level (inter-vehicle distance), the warning notification unit 13 determines that the running inter-vehicle distance is below the high risk level (inter-vehicle distance), and Monitor whether or not the vehicle has reached a high level (distance between vehicles). In other words, "the inter-vehicle distance during driving has fallen below the high risk level (inter-vehicle distance) to reach the high risk level (inter-vehicle distance)" means that the inter-vehicle distance exceeds X1 mail. It is a state of reaching 1 meter from the state.

  Further, for example, when the inter-vehicle distance threshold level is set to the medium risk level (inter-vehicle distance), the warning notification unit 13 indicates that “the running inter-vehicle distance is below the high risk level (inter-vehicle distance). Whether or not the vehicle has reached the high risk level (inter-vehicle distance), and "when the inter-vehicle distance is less than the medium risk level (inter-vehicle distance), the medium risk level (inter-vehicle distance) ) Has been reached ”. In addition, for example, when the inter-vehicle distance threshold level is set to the low risk level (inter-vehicle distance), the warning notification unit 13 indicates that “the running inter-vehicle distance is below the high risk level (inter-vehicle distance). From the state of reaching the high risk level (inter-vehicle distance) "," From the state where the inter-vehicle distance during driving is below the medium risk level (inter-vehicle distance) to the medium risk level (inter-vehicle distance) "Whether the vehicle has reached the state where it has reached" or "Whether the inter-vehicle distance during traveling has fallen below the low risk level (inter-vehicle distance) to reach the low risk level (inter-vehicle distance)" To monitor.

  When the traveling inter-vehicle distance reaches any level equal to or higher than the inter-vehicle distance threshold level, the warning notification unit 13 notifies a warning corresponding to the level. Here, in the present embodiment, the warning is given by voice output of a combination of the warning sound and the message. The content of the warning sound and the content of the message are predetermined for each of the three levels of the inter-vehicle distance during traveling. As an example, the warning sound corresponding to the high risk level (distance between vehicles) is a sharp sound, and the message content is "the distance between vehicles is short. Please take the distance between vehicles now." To recognize the situation. In addition, the warning sound corresponding to the medium risk level (vehicle distance) is a rather mild sound, and the content of the message is "The vehicle distance is a little short. Please pay attention to the vehicle distance." To do. In addition, the warning sound corresponding to the low risk level (vehicle distance) is a more gentle sound, and the content of the message is a simple one that supports the recognition of the vehicle distance, "please be careful of the vehicle distance." .

  For example, when the inter-vehicle distance threshold level is set to the medium-risk level (inter-vehicle distance), the warning notification unit 13 sets the danger level at that timing when the running inter-vehicle distance becomes the medium-risk level. The warning corresponding to the intermediate level is notified. The warning notifying unit 13 notifies the warning from the voice processing device 2 by controlling the voice output unit 10 based on predetermined voice data stored in a predetermined storage area.

  As described above, in the present embodiment, the warning notification unit 13 issues a warning when the running inter-vehicle distance reaches any level that is equal to or higher than the set inter-vehicle distance threshold level, while it is less than the inter-vehicle distance threshold level. No warning is given even when the level reaches. The inter-vehicle distance during traveling corresponds to the "warning target event" in the claims, and particularly to the "event relating to the traveling state of the vehicle".

<Process to notify warning about inattentiveness>
FIG. 2B is a diagram used for explaining the level of looking aside and other related matters. In the present embodiment, three levels of a high risk level (side view), a medium risk level (side view), and a low risk level (side view) are set with respect to the aspect of the side view from the viewpoint of the risk level. . As shown in FIG. 2 (B), the high-risk level (inatari) is “Ootsuki”, the medium-risk level (inatari) is “Inside”, and the low-risk level (inatari) is “Small”. "Wakimi". Further, as described later, the driver looks aside at any one of the three levels of the high risk level (aside watching), the medium risk level (aside watching), and the low risk level (aside watching). Specified as a threshold level.

  Then, during the power-on period, the warning notifying unit 13 determines whether the driver is looking aside at any level (including the looking aside threshold level) higher than the aside looking threshold level based on the looking aside determination result information input from the aside looking detection unit 12. To see if it was done by. For example, when the inattentive threshold level is set to the medium risk level (inattentive), the warning notification unit 13 asks, "Whether the driver has performed an inattentive at the high risk level (inattentive) (= large inattentive). "Whether or not" and "whether or not the driver performs a middle level (side look) side view (= middle look)" are monitored.

  When the driver performs the inattentiveness at any level higher than the inattentive threshold level, the alerting unit 13 issues an alert corresponding to the level. Here, in the present embodiment, the content of the warning sound and the content of the message are predetermined for each of the three levels of inattentiveness. As an example, the warning sound corresponding to the high level of danger (looking aside) is a sharp sound, and the content of the message is a driver with a high degree of urgency, "Waiting driving is dangerous. Please check the front of the vehicle now." To recognize the situation. Further, the warning sound corresponding to the medium level of danger (looking aside) is a rather mild sound, and the content of the message is to call attention that "looking aside is dangerous." Further, the warning sound corresponding to the low risk level (looking aside) is a more gentle sound, and the content of the message is to support the recognition of the sidewalk, "please be careful while looking aside."

  As described above, in the present embodiment, the warning notification unit 13 issues a warning when the driver looks aside at a level that is equal to or higher than the set look-ahead threshold level, while warning levels below the look-ahead threshold level are given. No warning will be given if the driver is looking aside. The inattention corresponds to the "event to be warned" in the claims, and particularly to the "event related to the driving situation of the user who is the driver".

  The threshold level setting unit 14 sets the inter-vehicle distance threshold level and the inattentive threshold level according to the driver's designation. More specifically, the threshold level setting unit 14 displays a predetermined user interface on the touch screen 3 when a predetermined operation is performed on the touch screen 3. This predetermined user interface has a configuration in which the inter-vehicle distance threshold level and the inattentive threshold level can be designated by a touch operation, and the driver performs a touch operation to designate the inter-vehicle distance threshold level and the inattentive threshold level. The threshold level setting unit 14 recognizes the inter-vehicle distance threshold level and the inattentive threshold level designated by the touch operation of the driver, and sets them. The inter-vehicle distance threshold level and the inattentive threshold level are set by, for example, updating the item values of the items in the setting file. Hereinafter, the inter-vehicle distance threshold level and the inattentive threshold level may be collectively referred to as “threshold level”. The method for the user to specify the threshold level is not limited to the method exemplified in this embodiment. For example, the designation may be made by using a mechanical switch or by using a voice.

  The monitoring information recording unit 15 monitors whether or not the inter-vehicle distance during traveling is one level smaller than the inter-vehicle distance threshold level during the power-on period, and the inter-vehicle distance log data stored in the storage unit 17 is monitored. The log is described in 18. The inter-vehicle distance log data 18 corresponds to the “monitoring result information” in the claims, and the “write a log in the inter-vehicle distance log data 18” process is the “monitoring result information indicating the monitoring results” in the claims. This is equivalent to the “record” process. In addition, the monitoring information recording unit 15 monitors whether or not the driver has performed an inattentive level one step lower than the inattentive threshold level during the power-on period, and the inattentive log data stored in the storage unit 17 is monitored. The log is described in 19. The inattentive log data 19 corresponds to “monitoring result information” in the claims, and the “write a log in inattentive log data 19” process records “monitoring result information indicating a monitoring result” in the claims. It corresponds to processing. Hereinafter, regarding the processing of the monitoring information recording unit 15, the processing of writing a log in the inter-vehicle distance log data 18 and the processing of writing a log in the inattentive log data 19 will be described in order.

<Process for writing a log in the inter-vehicle distance log data 18>
During the power-on period, the monitoring information recording unit 15 monitors, based on the information input from the traveling distance detecting unit 11, whether or not the traveling distance becomes one level smaller than the inter-vehicle distance threshold level. To do. For example, when the inter-vehicle distance threshold level is set to the high risk level (inter-vehicle distance), the level one level lower than the inter-vehicle distance threshold level is the medium risk level (inter-vehicle distance), and therefore the monitoring information recording unit Reference numeral 15 monitors whether or not the running inter-vehicle distance has fallen below the medium risk level (inter-vehicle distance) to the medium risk level (inter-vehicle distance). When the inter-vehicle distance threshold level is set to the low risk level (inter-vehicle distance), there is no level that is one step lower than the inter-vehicle distance threshold level, so processing that describes a log in the inter-vehicle distance log data 18 is not performed. I don't know.

  When the running distance between vehicles becomes one level smaller than the inter-vehicle distance threshold level, the monitoring information recording unit 15, together with information indicating the time (date + time) at that time, is one level less than the inter-vehicle distance threshold level. Is described in the inter-vehicle distance log data 18. FIG. 3 is a diagram showing an example of the contents of the inter-vehicle distance log data 18. As shown in FIG. 3, the monitoring information recording unit 15 sets the information indicating the time and the level that is one step smaller than the inter-vehicle distance threshold level each time the traveling inter-vehicle distance becomes a level that is one step smaller than the inter-vehicle distance threshold level. A combination with the indicated information (hereinafter referred to as "inter-vehicle distance log") is cumulatively described in the inter-vehicle distance log data 18.

  However, in consideration of the case where the inter-vehicle distance during traveling goes up or down by one level smaller than the inter-vehicle distance threshold level in a very short period, after describing one inter-vehicle distance log, the next inter-vehicle distance is continued for a certain period. It may be configured to prohibit the log description. It should be noted that the inter-vehicle distance log data 18 is newly generated every time the power of the warning notification device 1 is turned on, in addition to the inter-vehicle distance log data 18 that has already been generated, and the power of the power is supplied until the power is turned off. The inter-vehicle distance log is described in the inter-vehicle distance log data 18 newly generated in response to the ON state. In addition to the inter-vehicle distance log, the inter-vehicle distance log data 18 describes the start time (= power-on time) and end time (= power-off time) of the power-on period. It may be configured such that the log description is prohibited in a predetermined case, that new log data is generated when the power is turned on, and that information other than the log is described in the log data. Is also the same.

<Process of writing a log in the inattentive log data 19>
During the power-on period, the monitoring information recording unit 15 monitors, based on the inattentive judgment result information input from the inattentive detection unit 12, whether or not the driver has performed an inattentive step that is one step lower than the inattentive threshold level. . Note that when the inattentive threshold level is set to the low risk level (inattentiveness), there is no level one step lower than the inattentive threshold level, and therefore the log is not written in the inattentive log data 19.

  When the driver performs a sidewalk that is one step lower than the inattentive threshold level, the monitoring information recording unit 15 provides information indicating the time at that time and information indicating a level one step below the inattentive threshold level in the inattentive log data. It describes in 19. That is, the monitoring information recording unit 15 combines the information indicating the time and the information indicating the level one step lower than the inattentive threshold level each time the driver performs an inattentive level one step lower than the inattentive threshold level (hereinafter, "Wakisari log" is cumulatively described in the Wakisari log data 19.

  The information providing unit 16 is generated when the power of the warning notification device 1 is turned on last time, and the inter-vehicle distance log data 18 (hereinafter referred to as inter-vehicle distance log data) in which the inter-vehicle distance log is described during the power-on period is described. , "Previous inter-vehicle distance log data"), and provides predetermined information in a predetermined case. Further, the information providing unit 16 generates the inattentive log data 19 (hereinafter referred to as inattentive log data) in which the inattentive log is written during the power-on period, which is generated when the power of the warning notification device 1 is turned on last time. , "Previous inattentive log data"), and provides predetermined information in a predetermined case. Hereinafter, regarding the processing of the information providing unit 16, the processing based on the previous inter-vehicle distance log data 18 and the processing based on the previous inattentive log data 19 will be sequentially described.

<Processing based on the previous inter-vehicle distance log data 18>
The information providing unit 16 refers to the previous inter-vehicle distance log data stored in the storage unit 17, and in the previous power-on period, the running inter-vehicle distance is a level (= It is determined whether the level has become one level smaller than the inter-vehicle distance threshold level). Hereinafter, the level that was the monitoring target of the monitoring information recording unit 15 in the previous power-on period will be referred to as a “monitoring target level”. In the previous power-on period, if the running distance between vehicles has never reached the monitoring target level, the information providing unit 16 does not provide the predetermined information.

  On the other hand, in the previous power-on period, if the level of the inter-vehicle distance during traveling has been the monitoring target level at least once, the information providing unit 16 causes the previous power-on based on the previous inter-vehicle distance log data. During the period, the frequency at which the running distance becomes the monitoring target level is calculated. In the present embodiment, the frequency is a value obtained by dividing the total number of times that the level of the inter-vehicle distance during traveling becomes the monitoring target level by the total time of the previous power-on period. However, it is not necessary to use the value calculated in this way as the frequency, for example, the unit time in the period from the timing when the monitoring target level is first reached to the timing when the monitoring target level is reached last during the power-on period. The number of hits may be the frequency.

  After calculating the frequency, the information providing unit 16 creates the first message. FIG. 4A is a diagram used for explaining the first message. The first message relating to the inter-vehicle distance during traveling is information on the driving tendency regarding the inter-vehicle distance during traveling, and as shown in FIG. 4 (A), “Recently,“ keyword A ”is in“ keyword B ”. is. ]. When the monitoring target level is the medium risk level (inter-vehicle distance), the wording “the inter-vehicle distance is considerably short” is included in the “keyword A”, and the monitoring target level is the low risk level (inter-vehicle distance). If it is, the wording "the distance between the vehicles is short" is entered. The "keyword B" contains the word "frequently" when the calculated frequency is equal to or higher than a predetermined value, and the word "occasionally" when the calculated frequency is lower than the predetermined value.

  Further, the information providing unit 16 determines whether to provide the second message after the first message. The information providing unit 16 determines that the second message is provided when the calculated frequency is equal to or higher than the predetermined frequency, and determines that the second message is not provided when the calculated frequency is not higher than the predetermined frequency. The second message is information urging the current inter-vehicle distance threshold level to be lowered by one level. For example, when the current inter-vehicle distance threshold level is the medium risk level (inter-vehicle distance), the second message is “If the inter-vehicle distance threshold level is set to the low risk level, a specific situation occurs. I will advise you. ]. Next, the information providing unit 16 controls the voice output unit 10 to output the first message by voice, and when determining that the second message is to be provided, continuously outputs the second message as voice.

<Processing based on the previous inattentive log data 19>
The information providing unit 16 refers to the previous inattentive log data stored in the storage unit 17, and during the previous power-on period, the driver is allowed to inattentive at the monitoring target level (= one step lower than the inattentive threshold level). It is determined whether it has been performed. If it has not been performed even once, the information providing unit 16 does not provide the predetermined information. On the other hand, when it is performed once or more, the information providing unit 16 calculates, based on the previous inattentive log data, the frequency at which the user performs inattentive monitoring at the monitoring target level in the previous power-on period. Next, the information providing unit 16 creates the first message. FIG. 4B is a diagram used for explaining the first message. The first message related to inattentiveness is information on the driving tendency related to inattentiveness, and as shown in FIG. 4 (B), “It seems that“ keyword A ”has been recently changed to“ keyword B ”. ]. When the monitoring target level is the medium risk level (inattention), the word “dangerous inattention” is included in the “keyword A”, and when the monitoring target level is the low risk level (inattention). Contains the word "Wakimi". The "keyword B" contains the word "frequently" when the calculated frequency is equal to or higher than a predetermined value, and the word "occasionally" when the calculated frequency is not the predetermined value.

  Further, the information providing unit 16 determines whether to provide the second message after the first message based on the calculated frequency. The second message is information urging the current inattentive threshold level to be lowered by one level. For example, when the inattentive threshold level at the present time is the medium risk level (inattentiveness), the second message is “If the inattentive threshold level is set to the low risk level, advice will be given in a specific situation. Will be. ]. Next, the information providing unit 16 controls the voice output unit 10 to output the first message by voice, and when determining that the second message is to be provided, continuously outputs the second message as voice.

  The above-described provision of the message by the information providing unit 16 is performed immediately after the warning notification device 1 is powered on. Therefore, the driver recognizes the content of the message before actually driving the own vehicle.

  As described above, the warning notification device 1 according to the present embodiment monitors whether or not the running inter-vehicle distance reaches any level equal to or higher than the inter-vehicle distance threshold level during the power-on period, and the running inter-vehicle distance is When the level becomes equal to or higher than the inter-vehicle distance threshold level, a warning corresponding to the level is notified in real time. On the other hand, the warning notification device 1 monitors whether or not the running inter-vehicle distance is one level smaller than the inter-vehicle distance threshold level during the power-on period, and writes a log in the inter-vehicle distance log data 18. Then, after the power-on period, at the timing when the power is turned on, based on the generated inter-vehicle distance log data 18, information indicating the driving tendency regarding the inter-vehicle distance during traveling is provided. In addition, information is provided that prompts the current inter-vehicle distance threshold level to be lowered by one level. It should be noted that similar processing is performed when the warning target event is inattentiveness.

  According to the above configuration, during the power-on period, even if the inter-vehicle distance during traveling becomes a level below the inter-vehicle distance threshold level, no warning is output in real time, and in that respect, It is possible to prevent the user from feeling annoyed. Furthermore, according to the above configuration, at the timing when the power is turned on after the power-on period, a message based on the monitoring result is provided based on the inter-vehicle distance log data 18 generated during the power-on period. . Therefore, the driver is completely aware that the inter-vehicle distance during traveling was below the inter-vehicle distance threshold level in the previous power-on period, that is, a dangerous situation occurred during driving. We can recognize this based on the messages provided afterwards, rather than not. This also applies to the inattentive.

  Further, the warning notification device 1 according to the present embodiment includes a threshold level setting unit 14 that sets a threshold level (inter-vehicle distance threshold level, inattentive threshold level) according to a driver's designation. According to this configuration, the driver can arbitrarily set the threshold level so that the warning notified in real time is not bothersome to him / her, and more effectively the user can be prevented from feeling the warning bothersome.

  In addition, in the present embodiment, the information providing unit 16 uses the inter-vehicle distance log data 18 (previous inter-vehicle distance log data) to monitor the result of the monitoring information recording unit 15 (= the log described in the inter-vehicle distance log data 18). The information regarding the driving tendency assumed by the content) is provided as the first message. According to this configuration, the driver can recognize the driving tendency of the driver, which is originally recognizable when the warning is notified in real time, after the warning notification is stopped in real time, and subsequently.

  Further, in the present embodiment, the information providing unit 16 determines, based on the inter-vehicle distance log data 18 whose log is described by the monitoring information recording unit 15, the frequency at which the running inter-vehicle distance becomes the monitoring target level during the power-on period. If the frequency is equal to or higher than the predetermined value, the second message provides information for prompting the current inter-vehicle distance threshold level to be lowered by one step. According to this configuration, it is possible to give the driver an opportunity to make another judgment as to whether or not the current inter-vehicle distance threshold level should be lowered by one step. This also applies to the inattentive.

  Next, an operation example of the warning notification device 1 will be described using the flowchart of FIG. FIG. 5A is a flowchart showing the operation of the warning notification device 1 during the power-on period. As shown in FIG. 5 (A), the warning notification unit 13 monitors whether or not the running inter-vehicle distance reaches any level higher than the inter-vehicle distance threshold level during the power-on period, and detects the inter-vehicle distance threshold. When the level becomes any level higher than the level, a warning corresponding to the level is notified (step SA1). The warning notifying unit 13 continuously executes this process during the power-on period.

  In step SA1, in parallel with the processing of the warning notification unit 13, the monitoring information recording unit 15 monitors whether or not the traveling inter-vehicle distance is one level smaller than the inter-vehicle distance threshold level (monitoring target level). Then, the log is described in the inter-vehicle distance log data 18 stored in the storage unit 17. The monitoring information recording unit 15 continuously executes this processing during the power-on period.

  FIG. 5B is a flowchart showing the processing of the warning notification device 1 when the power is turned off once and then the power is turned on after the power-on period corresponding to the flowchart of FIG. 5A. . As shown in FIG. 5B, the information providing unit 16 refers to the previous inter-vehicle distance log data stored in the storage unit 17, and in the previous power-on period, the running inter-vehicle distance is the monitoring information recording unit. It is determined whether the monitoring target level of 15 has ever been reached (step SB1). When the information has not been received once (step SB1: NO), the information providing unit 16 does not provide the predetermined information.

  On the other hand, in the previous power-on period, if the inter-vehicle distance during traveling has reached the monitoring target level more than once (step SB1: YES), the information providing unit 16 determines, based on the previous inter-vehicle distance log data, In the previous power-on period, the frequency at which the running distance becomes the monitoring target level is calculated (step SB2). Next, the information providing unit 16 creates the first message (step SB3). Next, the information providing unit 16 determines whether to provide the second message (step SB4). Next, the information providing unit 16 outputs (provides) the message (first message or first message + second message) by voice (step SB5).

  Although one embodiment of the present invention has been described above, the above embodiment is merely an example of the embodiment for carrying out the present invention, and thus the technical scope of the present invention is interpreted in a limited manner. It should not be done. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

  For example, in the above-described embodiment, the monitoring information recording unit 15 is a target for logging only an event having a level one step lower than the threshold level. For example, the monitoring information recording unit 15 is configured to describe the inter-vehicle distance log when the traveling inter-vehicle distance is one level lower than the inter-vehicle distance threshold level. In this regard, the monitoring information recording unit 15 may be configured to log an event of a level smaller than two levels. In this case, the information providing unit 16 provides information regarding the driving tendency that is assumed by the occurrence status of an event of two or more levels smaller, and, if necessary, information that prompts the threshold level to be lowered. With respect to this point, the monitoring information recording unit 15 also logs the warning target event of the threshold level and the level higher than the threshold level, and the information providing unit 16 notifies the message regarding the warning target event. It may be configured.

  Further, in the above-described embodiment, the events corresponding to the “warning target event” in the claims are the events related to the inter-vehicle distance during traveling and the events related to the inattentiveness. However, the warning target event is not limited to the ones exemplified in the above embodiment. As an example, the situation of sudden acceleration, the situation of sudden deceleration, the situation of staggering, the situation of sudden turning, the number of lane changes, etc. can be set as the warning target event related to the driving situation of the vehicle, and the situation of dozing etc. It can be a warning target event related to the driving situation of the user who is the driver.

  Further, in the above-described embodiment, the information providing unit 16 is configured to notify the message by voice. However, the means for notifying the message is not limited to voice output, and for example, an image (characters) on a display device such as the touch screen 3 may be displayed. Display (including columns).

  In addition, in the above-described embodiment, the period in which the monitoring information recording unit 15 logs in one log data is the power-on period. However, the period in which the monitoring information recording unit 15 logs one log data is not limited to the power-on period. For example, it may be a period spanning a plurality of power-on periods.

  Further, in the above embodiment, the threshold level is specified by the user, but the threshold level may be fixed.

1 Warning Notification Device 13 Warning Notification Unit 14 Threshold Level Setting Unit 15 Information Providing Unit

Claims (8)

A warning notification device that notifies a warning about a warning target event that affects the danger of driving a vehicle,
During a predetermined period including the period in which the vehicle is driven, it is monitored whether or not the warning target event having a level higher than the threshold level has occurred, and the warning target event having a level higher than the threshold level has occurred. , A warning notification unit that notifies a warning corresponding to the level,
During the predetermined period, of the warning target events of a level lower than the threshold level, it is monitored whether or not the warning target event of a level that is at least one step lower than the threshold level occurs, and the monitoring result is displayed. A monitoring information recording unit for recording the monitoring result information shown,
Based on the monitoring result information recorded by the monitoring information recording unit, at a predetermined timing after the predetermined period, the warning target event of the level monitored by the monitoring information recording unit is in a predetermined mode. If it has occurred, an information providing unit that provides information based on the monitoring result of the monitoring information recording unit,
A warning notification device comprising:   The warning notification device according to claim 1, further comprising a threshold level setting unit that sets the threshold level according to a user's designation. The information providing unit,
Based on the monitoring result information, when the warning target event at the level monitored by the monitoring information recording unit occurs in a predetermined mode, the operation estimated by the monitoring result of the monitoring information recording unit is performed. The warning notification device according to claim 1, wherein the warning notification device is provided with information on a tendency of. The information providing unit,
Based on the monitoring result information recorded by the monitoring information recording unit, in the predetermined period, the monitoring information recording unit determines the frequency of occurrence of the warning target event at the level of the monitoring target, and the frequency is predetermined. In the above case, the warning notification device according to claim 2, wherein the warning notification device provides information that prompts the current threshold level to be lowered by one step. The monitoring information recording unit,
After the power of the device main body is turned on, the period until it is turned off is the predetermined period, and the monitoring result information indicating the monitoring result in the predetermined period is recorded.
The information providing unit,
The information is provided based on the monitoring result information indicating the monitoring result in a period after the power was turned on last time until it is turned off at the timing when the power was turned on. The warning notification device according to any one of claims.   The warning notification device according to any one of claims 1 to 5, wherein the warning target event includes a traveling state of a vehicle.   The warning notification device according to any one of claims 1 to 6, wherein the warning target event includes a driving situation of a user who is a driver. The warning notifying unit of the warning notification device that gives a warning about a warning target event that affects the danger of driving the vehicle, the warning of a level equal to or higher than a threshold level for a predetermined period including a period in which the vehicle is driven. Monitors whether or not a target event has occurred, and when the warning target event of a level equal to or higher than the threshold level has occurred, while notifying a warning corresponding to the level, the monitoring information recording unit of the warning notification device, During the predetermined period, of the warning target events of a level lower than the threshold level, it is monitored whether or not the warning target event of a level that is at least one step lower than the threshold level occurs, and the monitoring result is displayed. Recording the monitoring result information shown,
The information providing unit of the warning notification device, at a predetermined timing after the predetermined period, based on the monitoring result information recorded by the monitoring information recording unit, the level that the monitoring information recording unit has monitored A step of providing information based on the monitoring result of the monitoring information recording unit when the warning target event occurs in a predetermined mode;
A warning notification method comprising: