JP2006308507A - Careful drive guide device and method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To guide a driving operation so that a fellow passenger feels comfortable. <P>SOLUTION: The driving operation and driving scene into which a driver tends to fall and where the fellow passenger feels discomfort on a travel route from the current position to a destination are estimated by analyzing the past driving operation and the history of the driving scenes using data registered into the fellow passenger discomfort data base 18 every driving scene, and are overlaid and displayed on the travel route displayed on a display section 5. The driver can previously know the point and driving operation where the fellow passenger feels discomfort on the travel route, and can be urged to correct the driving trend so that the fellow passenger does not feel discomfort. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a caring driving guide device and a caring driving guide method for detecting a driving operation uncomfortable for a passenger and notifying the driver.

Conventionally, a device for appropriately correcting the degree of acceleration of a vehicle according to the presence or absence of a passenger is described in Japanese Patent Application Laid-Open No. 8-337133.
When caring for passengers, such as when infants, elderly people, and people with reduced mobility are required, the driver is very careful not to disturb the accelerator operation. In general, the driver and passengers have different discomfort with respect to the acceleration of the vehicle. For this reason, the above apparatus attempts to appropriately control the acceleration according to the presence or absence of a passenger.
JP-A-8-337133

However, in this conventional apparatus, on-time acceleration information is presented to the driver and urged not to perform rapid acceleration, but the acceleration information alone is not sufficient as an index for expressing passenger discomfort. .
Unless the driver recognizes which part of his / her driving operation he / she feels uncomfortable, it is difficult to improve the driving tendency so that the passenger does not feel discomfort. Therefore, it is necessary to accurately transmit to the driver the driving operation that the passenger feels uncomfortable in order to improve the driving tendency, but the conventional apparatus cannot cope with this.
Furthermore, it is difficult for the driver to know which driving should be taken at which point on the route along which the vehicle will travel.

  In view of the above problems, an object of the present invention is to provide a caring driving guide device and a caring driving guide method for guiding driving operations so that passengers can feel comfortable.

  In the present invention, the driving scene estimating means estimates a driving scene based on the driving route searched by the driving route searching means, and the passenger discomfort detecting means is based on the driving state detected by the driving state detecting means. Whether the driving state detected by the driving state detecting means is detected in the passenger discomfort level database according to the driving scene, and the driving state detected by the driving state detecting means is detected by the driving state detecting means. The detection means registers whether or not it is detected that the driving state is uncomfortable for the passenger, and the point of caution estimation means that the driving scene on the travel route estimated by the driving scene estimation means The driving scenes registered in the database as being uncomfortable for passengers are displayed on the screen. In addition, the driving state registered as uncomfortable for the passenger at the estimated point of caution is estimated as passenger unpleasant driving, and the notification means drives the estimation result of the point of caution estimation means. It was supposed to notify the person.

  According to the present invention, based on the data registered in the passenger scene-specific passenger discomfort degree database, a point that the passenger feels uncomfortable on the travel route to be traveled is estimated as a point of caution, and further the passenger By estimating the uncomfortable driving and notifying the caution point and passenger uncomfortable driving by the notification means, the driver can be informed in advance of the point estimated that the passenger feels uncomfortable. The driving tendency can be corrected so as not to feel uncomfortable.

Next, embodiments of the present invention will be described by way of examples.
First, the first embodiment will be described.
FIG. 1 shows the overall configuration of the first embodiment.
The caring driving guide device detects a vehicle speed detecting unit 1 that detects a vehicle speed, an inter-vehicle distance detecting unit 2 that detects an inter-vehicle distance, a destination input setting unit 3 for setting a destination, and a current position of the host vehicle. The vehicle position detecting unit 4 that performs the processing, the in-vehicle computer 6 that performs various processes, and the display unit 5 that displays an output result from the in-vehicle computer 6 are configured.
The vehicle speed detection unit 1 is a vehicle wheel speed sensor, for example, and outputs a vehicle speed value corresponding to the vehicle speed to the in-vehicle computer 6.
The inter-vehicle distance detection unit 2 is a laser radar for an auto cruise device, for example, and outputs an inter-vehicle distance signal corresponding to the inter-vehicle distance to the in-vehicle computer 6.

The destination input setting unit 3 sets a destination based on, for example, an address or a telephone number input through a touch panel or the like installed on the display screen of the display unit 5, and sends the destination information to the in-vehicle computer 6. Output.
The own vehicle position detection unit 4 is, for example, a GPS receiver, detects the current position of the own vehicle based on information sent from the satellite, and outputs the detected own vehicle position to the in-vehicle computer 6.
The in-vehicle computer 6 performs an after-mentioned process to generate an image indicating which operation at which point the passenger feels uncomfortable in the driver's operation, and outputs the image to the display unit 5.

The in-vehicle computer 6 includes a deceleration calculation unit 10, a maximum vehicle speed calculation unit 11, and an average vehicle speed calculation unit 12 into which the vehicle speed values detected by the vehicle speed detection unit 1 are input, and further detected by the inter-vehicle distance detection unit 2. An average inter-vehicle distance calculation unit 13 to which an inter-vehicle distance signal is input is provided.
The deceleration calculation unit 10 calculates vehicle deceleration, the maximum vehicle speed calculation unit 11 calculates the maximum vehicle speed of the vehicle, and the average vehicle speed calculation unit 12 calculates the average vehicle speed of the vehicle. The average inter-vehicle distance calculation unit 13 calculates an average distance between the host vehicle and the preceding vehicle.

The in-vehicle computer 6 further includes a sudden braking degree calculation determination unit 14, an excessive speed calculation calculation determination unit 15, and a narrow inter-vehicle distance degree calculation determination unit 16.
The sudden braking degree calculation determination unit 14 calculates the sudden braking degree using the vehicle deceleration calculated by the deceleration calculating part 10, and is a braking operation uncomfortable for the passenger based on the calculated sudden braking degree. Judge whether or not.
The overspeeding degree calculation determination unit 15 calculates the overspeeding degree using the maximum vehicle speed calculated by the maximum vehicle speed calculation unit 11 and the average vehicle speed calculated by the average vehicle speed calculation unit 12, and the overspeeding degree is calculated. Based on this, it is determined whether the speed is uncomfortable for the passenger.
The narrow inter-vehicle distance degree calculation determination unit 16 uses the average vehicle speed calculated by the average vehicle speed calculation unit 12 and the average inter-vehicle distance calculated by the average inter-vehicle distance calculation unit 13 to determine whether the inter-vehicle distance to the preceding vehicle is narrow. A narrow inter-vehicle distance degree representing how is calculated, and it is determined whether the inter-vehicle distance is uncomfortable for the passenger based on the narrow inter-vehicle distance degree.

The in-vehicle computer 6 includes a passenger discomfort level calculation unit 17, a passenger discomfort level database 18 for each driving scene, and a discomfort level image creation unit 26.
The passenger discomfort degree calculation unit 17 is a driving in which the determination results of the sudden braking degree calculation determination unit 14, the overspeeding degree calculation determination unit 15 and the narrow inter-vehicle distance degree calculation determination unit 16 are estimated by a driving scene estimation unit 21 described later. The scene is registered in the passenger discomfort degree database 18 for each driving scene, and the registered data in the passenger discomfort degree database 18 for each driving scene is read out.
Further, the passenger discomfort degree calculation unit 17 determines the current passenger discomfort degree based on the determination results of the sudden braking degree calculation determination unit 14, the overspeeding degree calculation determination unit 15, and the narrow inter-vehicle distance degree calculation determination unit 16. calculate.
The discomfort degree image creating unit 26 creates an image for presenting the driver with the passenger discomfort degree calculated by the passenger discomfort degree calculating unit 17. The image data created by the discomfort degree image creation unit 26 is output to the display unit 5 and presented to the driver.

The in-vehicle computer 6 further includes a route search unit 19 that searches for a travel route of the host vehicle, a map database 20 that stores map data, and a driving scene estimation unit 21 that estimates a driving scene of the host vehicle.
The route search unit 19 is based on the destination set by the destination input setting unit 3, the own vehicle position detected by the own vehicle position detection unit 4, and the map data stored in the map database 20. Route search between destinations from the location.

The driving scene estimation unit 21 estimates a driving scene on the travel route searched by the route search unit 19.
In this embodiment, the types of driving scenes estimated by the driving scene estimation unit 21 are intersection right turn, intersection left turn, straight intersection, gentle curve (hereinafter referred to as a gentle curve), a sharp curve, a narrow road, and a side road. And
Further, the driving scene estimation unit 21 outputs the driving scene at the current position to the passenger discomfort degree calculation unit 17. Thus, the passenger discomfort level calculated by the passenger discomfort level calculation unit 17 and the driving scene are associated with each other and stored in the passenger scene discomfort level database 18 for each driving scene.

Further, the in-vehicle computer 6 generates a point-of-interest estimation unit 22 that estimates a point of interest on the travel route of the vehicle, a point-of-interest image creation unit 23 that creates a point-of-care point image, and creates a map and a travel route image. A map / route image creation unit 24 for synthesizing the image and a synthesis unit 25 for synthesizing the images.
The point-of-interest estimation unit 22 refers to the passenger-specific passenger discomfort degree database 18 to determine whether the passenger feels uncomfortable in the driving scene on the travel route estimated by the driving scene estimation unit 21. presume.
The point-of-interest image creation unit 23 creates a display image for presenting the points estimated by the point-of-interest estimation unit 22 that the passenger feels uncomfortable on the travel route from the current position to the destination.

The map / route image creation unit 24 creates a map from the current position to the destination and an image showing the travel route.
The synthesizing unit 25 synthesizes the point image created by the caution point image creating unit 23 that the passenger feels uncomfortable with the map created by the map / route image creating unit 24 and the travel route image. .
The image synthesized by the synthesis unit 25 is displayed on the display unit 5 and presented to the driver.

Next, the registration process of each data to the passenger discomfort database classified by driving scene performed in the vehicle-mounted computer 6 is demonstrated.
FIG. 2 is a diagram showing the flow of registration processing in the passenger discomfort level database for each driving scene.
In step 200, the vehicle speed detection unit 1 detects the vehicle speed.
In step 201, the deceleration calculation unit 10 calculates the deceleration using the following differential equation based on the vehicle speed calculated in step 200. A = dV / dt (1)
Here, A represents deceleration and V represents vehicle speed.

In step 202, the maximum vehicle speed calculation unit 11 calculates the maximum vehicle speed within a predetermined time based on the vehicle speed detected in step 200. In step 203, the average vehicle speed calculation unit 12 calculates the average vehicle speed within the predetermined time. To do.
In step 204, the inter-vehicle distance detection unit 2 detects the inter-vehicle distance from the preceding vehicle.
In step 205, the average inter-vehicle distance calculation unit 13 calculates the average inter-vehicle distance within a predetermined time based on the inter-vehicle distance detected in step 204.
Note that the processing of step 204 and step 205 may be performed at any time before the processing of step 206 described later, for example, before the processing of step 200 to step 203.

In step 206, the route search unit 19 acquires the host vehicle position from the host vehicle position detection unit 4, and acquires destination information from the destination input setting unit 3 in step 207.
Further, in step 208, the route search unit 19 determines between the current position and the destination based on the current position and destination information of the host vehicle acquired in steps 206 and 207 and the map data stored in the map database 20. Route search is performed.
In step 209, the driving scene estimation unit 21 estimates a driving scene on the travel route from the current position searched in step 208 to the destination.

Next, in step 210, the sudden braking degree calculation determination unit 14 calculates the sudden braking degree using the following equation based on the vehicle deceleration calculated in step 201.
EB = A (2)
Here, EB represents the sudden braking degree, and A represents the deceleration.
In this embodiment, it is assumed that the sudden braking degree = deceleration.

In step 211, the sudden braking degree calculation determination unit 14 determines whether or not the brake operation is uncomfortable for the passenger based on the calculated sudden braking degree.
It is known that the deceleration occurs at a magnitude of about 1.0 to 4.5 [m / s ² ] even during normal deceleration. Therefore, it is considered that a state where a deceleration having a magnitude within 4.5 [m / s ² ] is generated is a normal operation state.
Therefore, in this embodiment, when the comfortable zone of the sudden braking degree is 4.5 [m / s ² ] or less and the calculated sudden braking degree exceeds 4.5 [m / s ² ], the sudden braking degree calculation determination The part 14 determines that the sudden braking degree is uncomfortable for the passenger.
However, if the maximum value of the sudden braking degree is 6.0 [m / s ² ] or more, it is determined that the emergency braking is a sudden braking with a high degree of urgency, and safety is prioritized and it is determined that the passenger is not uncomfortable. .

In step 212, the excessive speed calculation determination unit 15 calculates the excessive speed using the following equation based on the maximum vehicle speed calculated in step 202 and the average vehicle speed calculated in step 203.
OS = MS / AS (3)
Here, OS represents the degree of excessive speed, MS represents the maximum vehicle speed (m / sec), and AS represents the average vehicle speed (m / sec).

In step 213, the excessive speed calculation determination unit 15 determines whether the speed is uncomfortable for the passenger based on the calculated excessive speed.
The vehicle speed is considered to always fluctuate by about 20% with respect to the average vehicle speed even in a normal traveling state, and the excessive speed in this state is 1.2.
Therefore, in this embodiment, when the comfort zone of the overspeeding degree is set to 1.2 or less and the maximum value of the overspeeding degree calculated exceeds 1.2, the overspeeding degree calculation determining unit 15 is for the passenger. Judge that the speed is unpleasant.
However, since the vehicle speed fluctuates immediately after starting or immediately before stopping, in such a case, it is determined that the passenger is not uncomfortable even if the maximum value of the overspeeding exceeds 1.2.

In step 214, the narrow inter-vehicle distance degree calculation determination unit 16 calculates a narrow inter-vehicle distance degree using the following equation based on the average vehicle speed calculated in step 203 and the average inter-vehicle distance calculated in step 205.
SD = AS / AFD (4)
Here, SD represents a narrow inter-vehicle distance degree, AS represents an average vehicle speed (m / sec), and AFD represents an average inter-vehicle distance (m).
Usually, the average reaction time of a person is 0.75 seconds.
Therefore, in this embodiment, the reciprocal of 0.75 (1.0 / 0.75 = 1.33) is calculated so that the value becomes large when the reaction time is short (unpleasant), and 1.33 The following are the comfort zones for the distance between vehicles.

In step 215, when the narrow inter-vehicle distance degree calculated using the equation (4) exceeds 1.33, the narrow inter-vehicle distance degree determination unit 16 determines that the narrow inter-vehicle distance is uncomfortable for the passenger.
However, immediately after starting or immediately before stopping, it is determined that the passenger is not uncomfortable even if the narrow inter-vehicle distance degree exceeds 1.33.

  In step 216, the passenger discomfort level calculation unit 17 determines whether the brake is uncomfortable in step 211, overspeed discomfort determination in step 213, and step 215 for each driving scene and discomfort determination type estimated in step 209. The date determined to have exceeded the comfort zone and the value at that time are registered in the passenger discomfort degree database 18 for each driving scene by the narrow inter-vehicle distance degree discomfort determination in FIG.

Here, FIG. 3 shows data registered in the passenger discomfort degree database 18 for each driving scene.
For example, when it is estimated that the driving scene is a right turn at the intersection in step 209 and it is determined in step 211 that the comfort zone has been exceeded by the sudden braking degree discomfort determination, the comfort zone is set as shown in the upper right column of FIG. The date (○ month ○ day) when it is determined that the vehicle has been exceeded and the sudden braking degree value (A) at that time are registered.
Further, for each driving scene, the passenger discomfort degree calculation unit 17 indicates the date determined to exceed the comfort zone by the sudden braking degree discomfort determination, the excessive speed discomfort determination, and the narrow inter-vehicle distance degree discomfort determination in FIG. Register the data in the data area for point estimation.
That is, as shown in the upper right column of FIG. 3, the same data is required simultaneously with the registration of the date (○ month ○ day) when it is determined that the comfort zone has been exceeded and the value (A) of the sudden braking degree at that time. It is also registered in the data section for attention point estimation.

The data registered in the driving scene passenger discomfort degree database 18 is data within the first predetermined period from the present, and the passenger discomfort degree calculation unit 17 inputs the data into the passenger scene discomfort degree database 18 by driving scene. At the time of data registration, the date is updated so that only data within a predetermined period remains in the passenger discomfort database by driving scene 18 using the above date, and old data is deleted.
When all the processes are completed, the process returns to step 200, and the above process is repeated to constantly update the data in the driving scene passenger discomfort degree database 18.

Next, a procedure for illustrating a point requiring attention on the travel route that has been searched will be described.
FIG. 4 shows a flow of a procedure for illustrating a point requiring attention on the travel route searched.
Steps 300 to 303 are the same as steps 206 to 209 described with reference to FIG.
Next, in step 304, the point-of-interest estimation unit 22 determines in which driving scene the driver performs an unpleasant driving operation in each driving scene on the travel route from the current position to the destination (the driving state is uncomfortable). ) Is estimated as a point requiring attention.
This estimation can be performed by an uncomfortable driving operation using, for example, caution point estimation data (data registered in the caution point estimation data field in FIG. 3) registered in the passenger discomfort level database 18 for each driving scene. A driving scene in which the number of times determined to be present is equal to or greater than a predetermined threshold is set as a point requiring attention.
In this embodiment, the predetermined threshold is set to 3 times, and as shown in FIG. 3, it is necessary to pay attention to an intersection right turn and a narrow road that are driving scenes that are determined to be an unpleasant driving operation 3 times or more. Estimate as a point.

Next, in step 305, the point-of-interest estimation unit 22 estimates which driving operation is the most unpleasant driving operation at the point estimated as the point of interest.
For example, when the data registered in the passenger scene database 18 for each driving scene is used and an intersection right turn is estimated as the point of caution, each driving operation (speed) at the point of caution (intersection right turn) The average value of the numerical value of discomfort is calculated for each of (high, narrow inter-vehicle distance, sudden braking), and the driving operation having the highest average value is estimated to be the most unpleasant driving operation at the point requiring attention.

In step 306, the point-of-interest image creation unit 23 generates an image representing the point of interest estimated in step 304 and a text image representing the item of interest estimated in step 305.
Specifically, the image indicating the point of caution is an image for emphasizing the point of caution on the travel route with a color such as red or blue, and the text image indicating the item of caution is determined in step 305. This is a text representation of the estimated items requiring attention.

Next, in step 307, the map / route image creation unit 24 uses the data in the map database 20 as the travel route image from the current position searched for in step 302 to the destination and the map image for displaying the travel route. Use to create.
In step 308, the composition unit 25 synthesizes the point-of-care point image data created in step 306 with the travel route image and map image created in step 307.
In step 309, the combining unit 25 outputs the combined image data to the display unit 5.

As a result, as shown in the display image example of the display unit 5 shown in FIG. 5, the map indicating the vehicle travel route and the point of interest displayed by painting the predetermined points on the vehicle travel route are displayed in the upper left of the display screen. Are displayed on the same map.
After outputting the image data to the display unit 5, this process is terminated.
In addition, this process is started again when necessity of route search arises again, such as destination information changing.
Here, the point-of-interest image creation unit 23 always acquires information on the current location of the host vehicle from the host vehicle position detection unit 4 to create an image indicating the current position of the host vehicle, and displays the host vehicle on the display unit 5. Update the position of.

Next, a procedure for displaying on the display unit 5 whether or not the current driving operation is an unpleasant driving operation will be described.
FIG. 6 shows a flow of processing for displaying the current passenger discomfort level.
Steps 400 to 405 are the same as steps 210 to 215 described with reference to FIG.
In step 406, the passenger discomfort degree calculation unit 17 determines that the first predetermined period used for accumulating data in the passenger scene discomfort degree database 18 for each driving scene within the second predetermined period. It is determined that the driving operation is uncomfortable by the sudden braking degree discomfort determination at step 401, the excessive speed discomfort determination at step 403, and the narrow inter-vehicle distance degree discomfort determination at step 405. Is calculated as passenger discomfort.

In step 407, the discomfort degree image creation unit 26 presents the driver with each of the sudden braking degree calculated in step 400, the overspeeding degree calculated in step 402, and the narrow inter-vehicle distance degree calculated in step 404. To create an image of passenger discomfort for each item.
Specifically, the discomfort degree image creation unit 26 creates an image representing the sudden braking degree, the excessive speeding degree, and the narrow inter-vehicle distance degree by a radar chart as the itemized passenger discomfort degree image.

In step 408, the discomfort degree image creation unit 26 creates a passenger discomfort degree image for presenting the passenger with the passenger discomfort degree calculated by the passenger discomfort degree calculation unit 17 in step 406.
Specifically, the discomfort degree image creation unit 26 creates an image representing the passenger discomfort degree by a bar graph.

In step 409, the discomfort degree image creating unit 26 creates a text image indicating which item the passenger feels most uncomfortable among the current high speed, narrow space, and sudden braking.
Specifically, the discomfort degree image creating unit 26 determines whether or not the passenger discomfort degree calculated in step 406 exceeds a predetermined value. If the passenger discomfort degree exceeds the predetermined value, the sudden braking calculated in step 400 is performed. In the case where the highest value item is extracted from the values of the degree of excessive speed calculated in step 402 and the narrow degree of inter-vehicle distance calculated in step 404. “Beware of sudden braking”, “Please be careful about the distance between vehicles” when the value of the narrow distance is the highest, Create a text image such as “Please pay attention to.”
In step 410, the image data created in steps 407 to 409 is output to the display unit 5.

Thereby, as in the display image example of the display unit 5 shown in FIG. 5, the radar chart created in step 407 is displayed in the lower right corner of the display screen, and the bar graph created in step 408 is displayed in the upper right corner of the display screen. Is done. Further, the text image created in step 409 is displayed in the lower left of the display screen.
Note that when the radar chart is created in step 407, the range that the passenger feels comfortable in each item of the sudden braking degree, the narrow inter-vehicle distance degree, and the overspeeding degree is displayed as a comfort zone in the radar chart.
Thereby, when the driver looks at the radar chart, it is possible to easily recognize which item is out of the comfort zone and how much.

  In this embodiment, Step 208 and Step 302 constitute the travel route search means in the present invention, and Step 209 and Step 303 constitute the driving scene estimation means in the present invention. Further, Steps 200 to 205, Steps 210, 212, and 214, Steps 400, 402, and 404 constitute the operation state detection means in the present invention. Furthermore, steps 211, 213, and 215 and steps 401, 403, and 405 constitute passenger discomfort detecting means in the present invention.

  The present embodiment is configured as described above, and the driving operation and the driving scene that the passenger, who is likely to fall into the driver, feel uncomfortable on the driving route from the current position to the destination, By using the data registered in the discomfort degree database 18 to estimate the past driving operation and the history of the driving scene, the driver can superimpose and display on the driving route displayed on the display unit 5. It is possible to know in advance the points and driving operations that the passenger will feel uncomfortable on the travel route, and to prompt the driver to correct the driving tendency so that the passenger does not feel uncomfortable.

  In addition, the current driving operation is detected for the three items of “sudden braking”, “narrow inter-vehicle distance”, and “too much speed”, and the driver is notified of the degree of sudden braking, the narrow inter-vehicle distance, and the excessive speed. Thus, the driver can easily understand which part of the current driving operation the passenger feels uncomfortable.

In addition, a passenger comfort zone is set for each of the three items of "sudden braking", "narrow inter-vehicle distance", and "speed too much", and whether or not the current driving operation is in the passenger comfort zone. By notifying the driver, the driver can easily understand how much the driver's driving operation is improved and how much the passenger is comfortable.
Further, by displaying on the display unit 5 a text image indicating which item the passenger is currently feeling is most uncomfortable among high speed, narrow distance and sudden braking, the driver can It is possible to more clearly understand which part of the driving operation the passenger feels uncomfortable.

In the above embodiment, as shown in FIG. 5, the radar chart is used to show the driver the degree of sudden braking, the narrow distance between vehicles, and the degree of excessive speed, but the present invention is not limited to this. A line graph can be used as shown in FIG. 8, or a pie chart can be used as shown in FIG.
In addition, when presenting using a pie chart, it is indicated which item the passenger feels uncomfortable depending on the relative area of each item of sudden braking degree, narrow inter-vehicle distance degree, and overspeeding degree item. Present. In addition, when the area of each item is the same, it shows that the passenger feels the same degree of discomfort about each item.
Although not illustrated, display methods other than the bar graphs shown in FIGS. 5, 7, and 8 may be used for passenger discomfort.
In these cases, the same effect as that obtained by using the radar chart can be obtained.

Next, a second embodiment will be described.
FIG. 9 shows the overall configuration of the second embodiment.
The caring driving guide device in the present embodiment includes an in-vehicle computer 6A in which the configuration in the in-vehicle computer 6 in the first embodiment is partially changed, and a speaker 28 instead of the display unit 5 in the first embodiment. It is.
The passenger discomfort calculation unit 17A determines the date when it is determined that the passenger discomfort calculation unit 17 in the first embodiment has exceeded the comfort zone as the point-of-care point estimation data in the passenger discomfort database 18 according to driving scene. In addition to the process of registering, the value at that time is registered as shown in FIG.

The point of caution estimation unit 22A estimates the point of caution as in the first embodiment based on the data registered in the passenger-specific passenger discomfort database 18 according to the driving scene, and the passenger is estimated at the point of caution estimated. Is estimated as a passenger discomfort degree prediction value.
Here, in the driving scene that is estimated to be a point of caution, the values when it is determined that the comfort zone has been exceeded (the value of sudden braking, the value of narrow inter-vehicle distance, the value of excessive speed) All average values, that is, the average value of the values in the attention point estimation data column of FIG. 3 in the driving scene are estimated as the passenger discomfort degree prediction values at the attention points.

The in-vehicle computer 6A includes a presentation music selection unit 27.
The presented music selection unit 27 acquires the current position of the host vehicle detected by the host vehicle position detection unit 4 and calculates which position the host vehicle is currently on the travel route searched by the route search unit 19. .
Furthermore, when the host vehicle reaches the point of interest estimated by the point-of-interest estimation unit 22A, the presented music selection unit 27 displays music indicating the driving operation to be noted and the degree of attention at the point of interest. The selection is made on the basis of a music selection table registered in the scene-specific passenger discomfort degree database 18.
The presented music selection unit 27 outputs the selected music to the speaker 28.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given and description thereof is omitted.
Also in this embodiment, the registration process of the passenger discomfort database by driving scene 18 shown in FIG. 2 in the first embodiment is performed.

Next, a procedure for presenting music at a point requiring attention on the travel route that has been searched will be described.
FIG. 10 shows a flow of a procedure for presenting music at a point requiring attention on the travel route searched.
Steps 500 to 504 are the same as steps 300 to 304 described with reference to FIG.
In step 505, the caution point estimation unit 22A determines in which driving scene the driver performs an unpleasant driving operation in each driving scene on the driving route from the current position to the destination, as in the first embodiment. Is estimated using the point-of-interest estimation data (see FIG. 3) registered in the passenger discomfort degree database 18 for each driving scene.

In step 506, the point-of-interest estimation unit 22A estimates a passenger discomfort degree prediction value indicating how much the passenger feels uncomfortable at the estimated point of interest.
Specifically, in a driving scene that is estimated to be a point of caution, the point of caution point estimation data (see FIG. 3) registered in the passenger discomfort database 18 for each driving scene is used to exceed the comfort zone. The average value of all the values when it is determined that the vehicle has been determined is calculated, and the calculation result is used as the passenger discomfort degree predicted value at the point requiring attention.

Next, in step 506, the presented music selection unit 27 refers to the passenger scene-specific passenger discomfort degree database 18, and determines which driving operation has exceeded the comfort zone in each driving scene as an unpleasant driving operation. Extract.
As shown in FIG. 3, for example, on narrow roads, it is determined that the comfort zone has been exceeded for high speed, narrow inter-vehicle distance, and sudden braking items. Are extracted as uncomfortable driving operations.

In step 507, the presented music selection unit 27 corresponds to the caution point estimated in step 504, the passenger discomfort degree predicted value (estimated in step 505) at the caution point, and the driving scene at the caution point. Using the unpleasant driving operation (extracted in step 506), music is selected based on the music selection table shown in FIG.
For example, if a narrow road is estimated as a point of caution, the passenger discomfort degree prediction value at that time is extremely large, and items of high speed, narrow distance, and sudden braking are extracted as an uncomfortable driving operation Then, the voice message “Please be careful about the sudden braking, the distance between vehicles, and the speed” in the lower right column of the music selection table shown in FIG. 11 is selected.
This music selection is performed in all sections on the travel route searched in step 502.

In step 508, the presented music selection unit 27 determines whether or not the host vehicle is currently at a point requiring attention based on the current position of the host vehicle detected by the host vehicle position detection unit 4 and the travel route searched in step 502. Judging.
If the current position is a point requiring attention, the process proceeds to step 509. If the current position is not a point requiring attention, the process returns to step 508 and the above processing is repeated.
In step 509, the presented music selection unit 27 outputs the presented music selected in step 506 at the current position to the speaker 28.
As a result, when the requested point is reached while the vehicle is traveling, the passenger discomfort degree prediction value and the music corresponding to the uncomfortable driving operation are output.

  This embodiment is configured as described above, and the point of caution estimation unit 22A estimates the point of caution and selects music according to the passenger discomfort degree prediction value and the uncomfortable driving operation at the point of caution. By outputting the music from the speaker 28, the driver can easily know in advance the points and driving operations that the passenger will feel uncomfortable on the driving route without looking at the screen. The driving tendency can be corrected so that the person does not feel uncomfortable.

Next, a third embodiment will be described.
In this embodiment, the point-of-interest estimation unit 22 in the first embodiment shown in FIG. 1 instructs the route search unit 19 to re-search for the travel route of the vehicle, as indicated by a broken line in FIG. It is what I did.
Also in the present embodiment, the registration process of the passenger discomfort database by driving scene 18 shown in FIG. 2 in the first embodiment is performed.

Next, a procedure for illustrating a point requiring attention on the travel route that has been searched will be described.
FIG. 12 shows a flow of a procedure for illustrating a point requiring attention on the travel route searched.
Steps 600 to 604 are the same as steps 300 to 304 described with reference to FIG.
In step 605, the caution point estimation unit 22 estimates the degree of caution on the travel route.
This estimation is based on, for example, attention point estimation data registered in the passenger discomfort database 18 for each driving scene (data for attention point estimation in FIG. 3) for each attention point on the travel route. The number of times that it is determined that the driving operation is uncomfortable at the point requiring attention is calculated, and the sum of the calculated number of times is used as the level of attention.

In step 606, the caution point estimation unit 22 determines whether or not the caution level in the travel route searched by the current process is equal to or less than a predetermined value.
If it is equal to or smaller than the predetermined value, the process proceeds to step 608, and thereafter, the same process as in steps 305 to 309 in the first embodiment is performed up to step 612. In addition, a point requiring attention displayed by painting a predetermined point on the travel route of the vehicle and a item requiring attention displayed by text display are displayed on the same map.

On the other hand, if it is determined in step 606 that the degree of caution on the travel route is not less than the predetermined value, the process proceeds to step 607.
In step 607, the point-of-interest estimation unit 22 increases the link cost of the point having the highest degree of attention on the travel route.
The link cost is a criterion for determining whether or not the route search unit 19 selects the point (section) as a travel route when searching for a travel route. If the link cost is high, the link cost ( It is assumed that (section) is not easily selected as a travel route.
After the link cost is increased, the point-of-interest estimation unit 22 instructs the route search unit 19 to search for a travel route again, and returns to step 602 on the flowchart to perform the route search.
By repeating the processing from step 602 to step 607 until the caution level of the searched travel route is equal to or less than a predetermined value, the travel route presented to the driver (the travel route displayed on the display unit 5) is This is a travel route that makes it difficult for passengers to feel uncomfortable.

  The present embodiment is configured as described above, and when the degree of caution required for the searched travel route is not less than or equal to the predetermined value, the point of caution estimation unit 22 increases the link cost of the route, and the degree of caution for the travel route is increased. By performing the route search by the route search unit 19 until the value becomes equal to or less than the predetermined value, it is possible to present a travel route with a low degree of caution to the driver. That is, since it is possible to present the driver with a travel route that does not cause discomfort to the passenger, the driver can travel along a route that does not cause discomfort to the passenger.

It is a figure which shows the whole structure of a 1st Example. It is a figure which shows the flow of the registration process to the passenger discomfort degree database according to a driving scene. It is a figure which shows the data registered into the passenger discomfort degree database according to a driving scene. It is a figure which shows the flow of the procedure which illustrates a point requiring attention on a driving | running route. It is a figure which shows the example of a display image of a display part. It is a figure which shows the flow of the process for displaying the present passenger's discomfort degree. It is a figure which shows the example of a display image of a display part. It is a figure which shows the example of a display image of a display part. It is a figure which shows the whole structure of a 2nd Example. It is a figure which shows the flow of the procedure which presents music in a point requiring attention. It is a figure which shows a music selection table | surface. It is a figure which shows the flow of the procedure which illustrates a point requiring attention on a driving | running route.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle speed detection part 2 Inter-vehicle distance detection part 3 Destination input setting part 4 Own vehicle position detection part 5 Display part 6, 6A Car-mounted computer 10 Deceleration calculation part 11 Maximum vehicle speed calculation part 12 Average vehicle speed calculation part 13 Average inter-vehicle distance calculation part DESCRIPTION OF SYMBOLS 14 Steep brake degree calculation determination part 15 Overspeeding degree calculation determination part 16 Narrow inter-vehicle distance degree calculation determination part 17, 17A Passenger discomfort degree calculation part 18 Passenger discomfort degree database according to driving scene 19 Route search part 20 Map database 21 Driving Scene estimation unit 22, 22A Caution point estimation unit 23 Caution point image creation unit 24 Map / route image creation unit 25 Composition unit 26 Discomfort image creation unit 27 Presented music selection unit 28 Speaker

Claims (9)

A travel route searching means for searching for a travel route;
Driving scene estimating means for estimating a driving scene of the vehicle based on the driving route searched by the driving route searching means;
Driving state detecting means for detecting the driving state;
Passenger discomfort detection means for detecting whether the driving state is uncomfortable for the passenger based on the driving state detected by the driving state detection means;
In the driving scene estimated by the driving scene estimating means, it is registered whether or not the driving state detected by the driving state detecting means is detected as an unpleasant driving state for the passenger by the passenger discomfort detecting means. A passenger discomfort database by driving scene,
Estimating a point of caution on the travel route searched by the travel route search means, and a point of caution estimation means for estimating passenger discomfort driving at the point of caution,
Informing means for informing the driver of the estimation result of the watch point estimation means,
The point of caution estimation means is a driving in which the driving scene on the travel route estimated by the driving scene estimation means is registered in the passenger scene discomfort database according to the driving scene as an unpleasant driving state for the passenger. Estimate the scene as the point of caution,
Furthermore, a caring driving guide device characterized in that a driving state registered as uncomfortable for the passenger at the estimated point of caution is estimated as the passenger uncomfortable driving. The passenger discomfort detection means calculates a passenger discomfort degree prediction value indicating how uncomfortable the driving state for the passenger based on the driving state detected by the driving state detection unit, Register the calculated passenger discomfort degree predicted value in the passenger discomfort degree database by driving scene,
The caution point estimation means estimates the caution point based on the size of the passenger discomfort degree predicted value registered in the passenger discomfort degree database by driving scene,
The said notification means notifies the estimation result of the said caution point estimation means to a driver with the priority based on the magnitude | size of the passenger discomfort degree prediction value in the said caution point. The caring driving guide device described. The notification means notifies the driver of the estimation result of the point-of-interest estimation means visually.
Comprising map image generating means for creating a map image to be presented through the notification means,
3. The caring driving guide device according to claim 1, wherein the notifying unit displays at least one of the caution point and a passenger uncomfortable driving on the map image. 4. The caring driving guide device according to claim 3, wherein the notifying unit notifies the driver of the driving state detected by the driving state detecting unit using a radar chart, a bar graph, a pie chart, or a line graph. . The passenger discomfort detecting means calculates whether or not the current driving state is uncomfortable for the passenger based on the driving state detected by the driving state detecting means as a current passenger discomfort level,
5. The caring driving guide device according to claim 3, wherein the notifying unit notifies the driver of the current passenger discomfort by using a radar chart, a bar graph, a pie chart, or a line graph. A current position detecting means for detecting the current position of the vehicle;
When the current position detected by the current position detection means is a point requiring attention estimated on the travel route searched by the travel route search means, the notification means
The caring driving guide device according to claim 1 or 2, wherein the driver is notified of the estimation result of the point-of-interest estimation means by sound. The travel route search means searches for a travel route so that there is no point of caution that the predicted passenger discomfort level calculated by the passenger discomfort detection means exceeds a predetermined value on the travel route to be searched. The caring driving guide device according to any one of claims 2 to 6, characterized in that: 8. The driving state detected by the driving state detection means is at least one of three items of sudden braking, a narrow inter-vehicle distance, and excessive speed, according to claim 1. Caring driving guide device. Searching the travel route of the vehicle, estimating the driving scene from the searched travel route, detecting the driving state, detecting whether the driving state is uncomfortable for the passenger based on the detected driving state, In the estimated driving scene, whether or not the detected driving state is an unpleasant driving state for the passenger is registered in the passenger scene discomfort degree database by driving scene,
The driving scene on the searched driving route is estimated as a driving point that is registered as a driving state that is uncomfortable for the passenger in the driving passenger discomfort database according to the driving scene, and further, The driving state registered as uncomfortable for the passenger at the point is estimated as passenger unpleasant driving, and the driver is informed of the estimated point of caution and the passenger uncomfortable driving. Driving guide method.

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