JP2006163473A - Caring driving guide device and caring driving guide method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caring driving guide device and a caring driving guide method for guiding a driving operation that a passenger feels comfortable to the driver.
SOLUTION: Sudden braking degree calculation determination unit 9 performs sudden braking degree discomfort determination, overspeeding degree calculation determination unit 10 determines excessive speed discomfort determination, and narrow inter-vehicle distance degree calculation determination unit 11 determines narrow inter-vehicle distance discomfort determination. The passenger discomfort calculation unit 12 detects a driving state that is uncomfortable for the passenger, and notifies the driver through the display unit 3 so that the driver feels the discomfort felt by the passenger directly. It is possible to urge correction of driving operation.
[Selection] Figure 1

Description

  The present invention relates to a caring driving guide device and a caring driving guide method for detecting a driving state 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. .
Furthermore, it is difficult for the driver to improve the driving tendency so that the passenger does not feel uncomfortable unless he / she recognizes what part of his / her driving operation he / she feels uncomfortable. is there. Therefore, in order to improve the driving tendency, it is necessary to accurately transmit the driving operation that the passenger feels uncomfortable to the driver, but there is a problem that the conventional apparatus cannot cope with this.

  Therefore, in view of such problems, the present invention informs the driver of a driving operation that the passenger feels uncomfortable and guides the driving operation so as to make the passenger comfortable. The purpose is to provide.

  The present invention detects the driving state of the vehicle by the driving state detecting means, detects whether or not the passenger discomfort detecting means is an unpleasant driving state for the passenger based on the detected driving state, and the detection result To the driver by the notification means.

  According to the present invention, it is possible to cause the driver to recognize the discomfort felt by the passenger via the notification means, so that it is possible to prompt the driver to correct the driving tendency so as not to feel the discomfort. .

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 includes a vehicle speed detection unit 1 that detects a vehicle speed, an inter-vehicle distance detection unit 2 that detects an inter-vehicle distance, an in-vehicle computer 4 that performs various processes, and a display unit that displays an output result from the in-vehicle computer 4. 3 is 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 4.
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 4.
The in-vehicle computer 4 performs an after-mentioned process to generate an image indicating which operation the passenger feels uncomfortable in the operation of the driver and outputs the image to the display unit 3.

The in-vehicle computer 4 includes a deceleration calculation unit 5, a maximum vehicle speed calculation unit 6, and an average vehicle speed calculation unit 7 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 8 to which an inter-vehicle distance signal is input is provided.
The deceleration calculation unit 5 calculates vehicle deceleration, the maximum vehicle speed calculation unit 6 calculates the maximum vehicle speed of the vehicle, and the average vehicle speed calculation unit 7 calculates the average speed of the vehicle. The average inter-vehicle distance calculation unit 8 calculates an average inter-vehicle distance between the host vehicle and the preceding vehicle.

The in-vehicle computer 4 further includes a sudden braking degree calculation determination unit 9, an excessive speed calculation calculation determination unit 10, and a narrow inter-vehicle distance degree calculation determination unit 11.
The sudden braking degree calculation determination unit 9 calculates the sudden braking degree using the vehicle deceleration calculated by the deceleration calculating part 5, and is a braking operation uncomfortable for the passenger based on the calculated sudden braking degree. Judge whether or not.
The excessive speed calculation determination unit 10 calculates the excessive speed using the maximum vehicle speed calculated by the maximum vehicle speed calculation unit 6 and the average vehicle speed calculated by the average vehicle speed calculation unit 7, and the excessive speed calculation degree Based on this, it is determined whether the speed is uncomfortable for the passenger.
In addition, the narrow inter-vehicle distance degree calculation determination unit 11 uses the average vehicle speed calculated by the average vehicle speed calculation unit 7 and the average inter-vehicle distance calculated by the average inter-vehicle distance calculation unit 8 to determine whether the inter-vehicle distance to the preceding vehicle is narrow. A narrow inter-vehicle distance degree that represents whether or not 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 4 includes a passenger discomfort calculation unit 12 and a display graph creation unit 13.
The passenger discomfort degree calculation unit 12 calculates the passenger's discomfort degree based on the calculation results of the sudden braking degree calculation determination unit 9, the overspeeding degree calculation determination unit 10, and the narrow inter-vehicle distance degree calculation determination unit 11.
The display graph creating unit 13 generates a graph for visually presenting the passenger discomfort level calculated by the passenger discomfort level calculating unit 12 to the driver.
The graph generated by the display graph creating unit 13 is displayed by the display unit 3 and presented to the driver.

Next, the caring driving guide process will be described.
FIG. 2 is a diagram illustrating the flow of the caring driving guide process.
In step 100, the vehicle speed detection unit 1 detects the vehicle speed.
In step 101, the deceleration calculation unit 5 calculates the deceleration using the following differential equation based on the vehicle speed calculated in step 100. A = dV / dt (1)
Here, A represents deceleration and V represents vehicle speed.

In step 102, the maximum vehicle speed calculation unit 6 calculates the maximum vehicle speed within a predetermined time based on the vehicle speed calculated in step 100. In step 103, the average vehicle speed calculation unit 7 calculates the average vehicle speed within the predetermined time. To do.
In step 104, the inter-vehicle distance detector 2 detects the inter-vehicle distance from the preceding vehicle.
In step 105, the average inter-vehicle distance calculation unit 8 calculates the average inter-vehicle distance within a predetermined time based on the inter-vehicle distance detected in step 104.
Note that the processing of step 104 and step 105 may be performed at any time before the processing of step 106 described later, for example, may be performed before the processing of step 100 to step 103.

In step 106, the sudden braking degree calculation determination unit 9 calculates the sudden braking degree using the following equation based on the vehicle deceleration calculated in step 101.
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 107, the sudden braking degree calculation determination unit 9 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 section 9 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 108, the excessive speed calculation determination unit 10 calculates the excessive speed using the following equation based on the maximum vehicle speed calculated in step 102 and the average vehicle speed calculated in step 103.
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 109, the excessive speed calculation determination unit 10 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.
Accordingly, 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 determination unit 10 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 110, the narrow inter-vehicle distance degree calculation determination unit 11 calculates a narrow inter-vehicle distance degree using the following equation based on the average vehicle speed calculated in step 103 and the average inter-vehicle distance calculated in step 105.
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.
When the narrow inter-vehicle distance degree calculated by using the equation (4) exceeds 1.33, it is determined 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 112, the passenger discomfort degree calculation unit 12 determines the number of times that the comfort zone has been exceeded by the sudden braking degree discomfort determination in step 107, the excessive speed discomfort determination in step 109, and the narrow inter-vehicle distance degree discomfort determination in step 111, that is, The sum total of the number of times determined to be uncomfortable for the passenger is obtained, and the obtained result is calculated as the passenger discomfort level.
The passenger discomfort level is reset when, for example, the ignition of the vehicle is turned off.

In step 113, the display graph creating unit 13 determines the sudden braking degree calculated in step 106, the overspeeding degree calculated in step 108, the narrow inter-vehicle distance degree calculated in step 110, and the same power calculated in step 112. Based on the person's discomfort level, image data of a display graph visually presented to the driver is created and output to the display unit 3.
In step 114, the display unit 3 displays a display graph based on the data input from the display graph creation unit 13 and presents it to the driver.

FIG. 3 shows a display screen of the display unit.
On the display screen of the display unit 3, a sudden braking degree, a narrow inter-vehicle distance degree, and an excessive speed degree are represented by a radar chart.
In addition, a passenger comfort zone is set in the radar chart in order to inform the driver in an easy-to-understand manner which current driving state is in the passenger comfort zone.
On the display screen of the display unit 3, a bar graph representing the passenger discomfort level is displayed on the upper stage, so that the driver can know how much discomfort is accumulated in the passenger.
In the bar graph, the shaded portion represents discomfort, and the discomfort increases as the shaded portion extends to the right.

When all the processes are completed, the process returns to step 100 and the above processes are repeated.
In this embodiment, steps 100 to 106, 108 and 110 constitute the driving state detecting means in the present invention, and steps 107, 109, 111 and 112 constitute the passenger discomfort detecting means in the present invention. Step 113 and step 114 constitute notification means in the present invention.

The present embodiment is configured as described above. The sudden braking degree calculation determination unit 9 performs sudden braking degree discomfort determination, the overspeeding degree calculation determination unit 10 performs excessive speed discomfort determination, and the narrow inter-vehicle distance degree calculation determination unit. 11 detects a driving state that is uncomfortable for the passenger by performing a narrow inter-vehicle distance degree discomfort determination, and informs the driver of the detection result to directly inform the driver of the discomfort felt by the passenger. It is possible to prompt the user to correct the driving operation.
In addition, it detects three driving states, “Sudden braking”, “Narrow inter-vehicle distance”, and “Overspeed”, and informs the driver of the sudden braking degree, narrow inter-vehicle distance degree, and overspeeding degree. The person can easily understand which part of his / her 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 state 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.

In the above embodiment, as shown in FIG. 3, the radar chart is used to present the driver with 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. 5, 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. 3 to 5 may be used for passenger discomfort.
In these cases, the same effects as those obtained by using the radar chart can be obtained.

Next, a second embodiment will be described.
FIG. 6 shows the overall configuration of the second embodiment.
The caring driving guide device in the present embodiment includes a music playback unit 20 and a presentation music selection unit 21 instead of the display unit 3 and the display graph creation unit 13 of the caring driving guide device in the first embodiment.
The presentation music selection unit 21 in the in-vehicle computer 4A selects music for aurally presenting the passenger's discomfort calculated by the passenger discomfort calculation unit 12 to the driver.
The music playback unit 20 plays back the music selected by the presented music selection unit 21.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given and description thereof is omitted.

Next, the caring driving guide process will be described.
FIG. 7 is a diagram showing the flow of the caring driving guide process.
Steps 200 to 212 are the same as steps 100 to 112 in FIG. 2 of the first embodiment, and a description thereof will be omitted.
In step 213, the presented music selection unit 21 determines the sudden braking degree calculated in step 206, the overspeeding degree calculated in step 208, the narrow inter-vehicle distance degree calculated in step 210, and the same riding calculated in step 212. Based on the user discomfort level, music is selected with reference to the reproduction music selection table shown in FIG. 8, and the selected music is output to the music reproduction unit 20 as an audio signal.
In the reproduction music selection table shown in FIG. 8, items exceeding the passenger comfort zone are shown in the horizontal rows, and the passenger discomfort level is shown in the vertical rows.

For example, the presented music selection unit 21 selects the music B when the passenger discomfort level is moderate and the item beyond the passenger comfort zone is a narrow inter-vehicle distance degree. If the passenger discomfort is extremely high and the items exceeding the passenger comfort zone are all items of sudden braking, narrow inter-vehicle distance, and excessive speed, all of the items are Please select a voice message.
The reproduction music selection table shown in FIG. 8 is stored in advance in a storage unit (not shown) and can be referred to by the presentation music selection unit 21.
Also, for the music selected by the presented music selection unit 21, each sound data is stored in advance in a storage unit (not shown).
As music A goes to music G, for example, fast-tempo music is set.

In step 214, the music reproduction unit 20 reproduces the audio signal input from the presentation music selection unit 21 and presents it to the driver.
When all the processes are completed, the process returns to step 200 and the above processes are repeated.
In this embodiment, steps 200 to 206, 208 and 210 constitute the driving state detecting means in the present invention, and steps 207, 209, 211 and 212 constitute the passenger discomfort detecting means in the present invention. Steps 213 and 214 constitute notification means in the present invention.

  The present embodiment is configured as described above, and music corresponding to the combination of the degree of sudden braking beyond the passenger comfort zone, the narrow distance between vehicles, the excessive speed and the level of passenger discomfort is shown in FIG. As shown in the playback music selection table shown in Fig. 2, the driver feels uncomfortable with which part of his driving operation by presenting the music selected according to the driving state by voice. Can be easily understood and correction of driving operation can be promoted.

Next, a third embodiment will be described.
FIG. 9 shows the overall configuration of the third embodiment.
The caring driving guide device in this embodiment includes a display graph creating unit 13B instead of the display graph creating unit 13 in the first embodiment, and further includes a jerk calculating unit 30 and a driver discomfort degree calculating unit 31. is there.
The in-vehicle computer 4B includes a jerk calculation unit 30 and a driver discomfort calculation unit 31.
The jerk calculation unit 30 calculates the temporal change in deceleration from the vehicle speed detected by the vehicle speed detection unit 1. The driver discomfort level calculation unit 31 calculates the driver's discomfort level based on the jerk calculated by the jerk calculation unit 30.
The display graph creating unit 13B creates a display image to be displayed on the display unit 3 based on the results calculated by the driver discomfort degree calculating unit 31 and the passenger discomfort degree calculating unit 12.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given and description thereof is omitted.

Next, the caring driving guide process will be described.
FIG. 10 and FIG. 11 are diagrams showing the flow of the caring driving guide process.
Step 300 and step 301 are the same as step 100 and step 101 in FIG. 2 of the first embodiment, and a description thereof will be omitted.
In step 302, the jerk calculation unit 30 calculates jerk using the following differential equation based on the vehicle speed calculated in step 300.
J = dA / dt = d ² V / dt ² (5)
Here, J represents jerk, A represents deceleration, and V represents vehicle speed.
Steps 303 to 313 are the same as steps 102 to 112 in FIG. 2 of the first embodiment, and a description thereof will be omitted.

Next, in step 314, the driver discomfort degree calculation unit 31 calculates the driving roughness degree based on the jerk calculated in step 302 using the following equation.
DS = J (6)
Here, DS represents the degree of driving roughness, and J represents jerk.
In this embodiment, the degree of driving roughness is jerk.

In step 315, the driver discomfort level calculation unit 31 determines whether the driving roughness is uncomfortable for the driver based on the calculated driving roughness level.
It is known that jerk is generated at a size of about 0.5 to 4.0 [m / s ³ ] even during normal deceleration. Accordingly, it is considered that a state in which a jerk having a size within 4.0 [m / s ³ ] is generated is a normal operation state.

Therefore, in this embodiment, when the comfortable zone of the driving roughness degree for the driver is set to 4.0 [m / s ³ ] or less and the calculated driving roughness degree exceeds 4.0 [m / s ³ ], driving is performed. The driver discomfort degree calculation unit 31 is a driving roughness degree that is unpleasant for the driver, and determines that the driver is uncomfortable.
However, when the maximum value of the degree of driving roughness is 7.0 [m / s ³ ] or more, since the degree of urgency is high, it is determined that the driver is not uncomfortable giving priority to safety.
In step 316, the driver discomfort degree calculation unit 31 determines the degree of driving roughness when it is determined that the sudden braking degree is uncomfortable, the degree of driving roughness when it is determined that the narrow inter-vehicle distance degree is unpleasant, and excessive speed. The degree of driving roughness when it is determined that the degree is unpleasant is calculated, and three average values are calculated as the degree of driver discomfort.

In step 317, the display graph creating unit 13B determines the sudden braking degree calculated in step 307, the overspeeding degree calculated in step 309, the narrow inter-vehicle distance degree calculated in step 311, and the same riding calculated in step 313. Based on the driver discomfort level and the driver discomfort level calculated in step 316, image data of a display graph for visual presentation to the driver is created and output to the display unit 3.
In step 318, the display unit 3 displays a display graph based on the data input from the display graph creation unit 13B and presents it to the driver.

Here, FIG. 12 shows a display screen of the display unit.
On the display screen of the display unit 3, a sudden braking degree, a narrow inter-vehicle distance degree, and an excessive speed degree are represented by a radar chart.
Further, a bar graph representing the passenger discomfort level calculated in step 313 and the driver discomfort level calculated in step 316 is displayed on the upper part of the display screen of the display unit 3.

When all the processes are completed, the process returns to step 300 and the above processes are repeated.
In this embodiment, steps 300, 301, 303 to 307, 309, and 311 constitute the driving state detecting means in the present invention, and steps 308, 310, 312, and 313 constitute the passenger discomfort detecting means in the present invention. To do. Steps 317 and 318 constitute notification means in the present invention. Steps 302, 314, and 315 constitute the driver discomfort detecting means in the present invention.

  The present embodiment is configured as described above, and by displaying both the driver discomfort level and the passenger discomfort level so that the respective correlations can be understood, the difference between the driver's comfort and the passenger's comfort is shown. It becomes clear, and it is possible to clearly know the driving operation that the driver should be careful for the passenger while dealing with his / her discomfort.

Next, a fourth embodiment will be described.
FIG. 13 shows the overall configuration of the fourth embodiment.
The caring driving guide device in the present embodiment is obtained by adding a passenger detection unit 40 and a priority setting unit 41 in the in-vehicle computer to the caring driving guide device in the first embodiment.
The passenger detection unit 40 is a pressure sensor attached to a seat for seating, for example, and detects whether a passenger is present in each of the passenger seat and the rear seat.
Passenger presence / absence information from the passenger detection unit 40 is input to the in-vehicle computer 4C.

The priority setting unit 41 in the in-vehicle computer 4C is operated by the presence / absence of a passenger detected by the passenger detection unit 40, the sudden braking degree calculated by the sudden braking degree calculation determination unit 9, and the excessive speed calculation determination unit 10. The priority of the items of the caring driving guide to be presented to the driver is set based on the calculated degree of excessive speed and the narrow degree of inter-vehicle distance calculated by the narrow inter-vehicle distance degree determination unit 11.
The items of the caring driving guide are “the distance between the vehicles is narrow”, “overspeed”, and “sudden braking”.

The display graph creating unit 13 </ b> C has the priority set by the priority setting unit 41, the uncomfortable determined by the sudden braking degree calculation determination unit 9, the excessive speed calculation determination unit 10, and the narrow inter-vehicle distance degree calculation determination unit 11. Based on the determination, a graph for visually presenting the passenger discomfort level to the driver is generated.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given and the description thereof is omitted.

Next, the caring driving guide process will be described.
14 and 15 are diagrams showing the flow of the caring driving guide process.
Steps 400 to 411 are the same as steps 100 to 111 in FIG. 2 of the first embodiment, and a description thereof will be omitted.
In step 412, the passenger detection unit 40 detects the presence / absence of the passenger and the seating position.
The passenger detection process in step 412 may be performed any time before the process in step 413 described later is performed.

In step 413, the priority setting unit 41 uses the passenger presence / absence information detected in step 412 and the seating position information, and based on the priority setting table shown in FIG. Set the priority.
When there is a passenger in the passenger seat, the passenger can experience the speed of the vehicle, so that the passenger feels a strong discomfort when overspeeding. Therefore, the priority of presentation is made highest.
Further, since the passenger can visually check the front distance of the host vehicle and confirm the distance between the vehicles, the passenger feels a strong discomfort when the distance between the vehicles is small. Therefore, the priority of presentation is made highest.
Since the passenger can check the distance between the vehicles by visually checking the front of the host vehicle, it is possible to anticipate in advance that a sudden braking operation will be performed. Therefore, even if a sudden braking operation is performed, a relatively uncomfortable feeling is not felt, so the priority of presentation is lowered.

On the other hand, when there is a passenger in the rear seat, the passenger can feel the speed of the vehicle, so that the passenger feels a strong uncomfortable feeling at overspeed. Therefore, the priority of presentation is made highest.
In addition, since the passenger cannot visually confirm the front distance of the host vehicle and confirm the inter-vehicle distance, even if the inter-vehicle distance is small, the passenger does not feel a relatively uncomfortable feeling, so the priority of presentation is lowered.
Since the fellow passenger cannot visually confirm the front distance of the vehicle and confirm the distance between the vehicles, if the sudden braking operation is performed, the passenger will experience an unexpected braking operation and feel relatively uncomfortable. Therefore, the priority of presentation is made highest.
Further, when there are passengers in the passenger seat and the rear seat, the value of the higher priority is set in each presentation item when there is a passenger in the passenger seat or when there is a passenger in the rear seat.
In FIG. 16, the number of star marks is proportional to the priority level.

In step 414, the passenger discomfort degree calculation unit 12 determines the number of times that the passenger is determined to be uncomfortable by the sudden braking degree discomfort determination in step 407, the excessive speed discomfort determination in step 409, and the narrow inter-vehicle distance degree discomfort determination in step 411. The sum is obtained, and the obtained result is calculated as passenger discomfort.
In step 415, the display graph creating unit 13C determines the sudden braking degree calculated in step 406, the overspeeding degree calculated in step 408, and the narrowness calculated in step 410 based on the priority set in step 413. Based on the inter-vehicle distance degree and the passenger discomfort degree calculated in step 414, image data of a display graph for visual presentation to the driver is created and output to the display unit 3.

Here, FIG. 17 shows a display screen of the display unit.
On the display screen of the display unit 3, the sudden braking degree, the narrow inter-vehicle distance degree, and the overspeeding degree are represented by a radar chart, and items with high priority are displayed large.
Here, it is assumed that there is a passenger in the passenger seat. Therefore, based on the priority setting table shown in FIG. 16, the items “near inter-vehicle distance” and “over-speed” are preferentially displayed, that is, two items, the narrow inter-vehicle distance degree and the excessive speed degree, It is displayed in a large size among large, medium and small display sizes.

  In this way, when the priority of the `` overspeed '' item is high as a caring driver's guide for passengers, the overspeed indication is enlarged so that the driver is particularly overspeeded. When the priority of the item “Narrower inter-vehicle distance” is high, the driver can recognize that the inter-vehicle distance is particularly narrow by increasing the display of the narrow inter-vehicle distance degree. be able to. In addition, when the priority of the item of “sudden braking” is high, it is possible to make the driver recognize that the braking is particularly sudden by increasing the display of the sudden braking degree.

In step 416, the display unit 3 displays the display graph input from the display graph creation unit 13C and presents it to the driver.
When all the processes are completed, the process returns to step 400 and the above processes are repeated.
In this embodiment, steps 400 to 406, 408, 410 constitute the driving state detecting means in the present invention, and steps 407, 409, 411, 414 constitute the passenger discomfort detecting means in the present invention. Steps 413, 415, and 416 constitute notification means in the present invention. Step 412 constitutes passenger detection means in the present invention.

The present embodiment is configured as described above, and the passenger detection unit 40 detects which seat (passenger seat, rear seat, etc.) the passenger is in the vehicle, and cares according to the detected position of the passenger. By changing the priority of the presenting item, it is possible to cope with the difference in passenger discomfort that changes depending on the position of the seat on which the passenger is sitting.
In addition, by changing the priority of the caring guide for passengers in three patterns: when passengers are in the passenger seat, in the rear seat, and in both the passenger seat and the rear seat, It is possible to perform a caring driving guide for passengers more finely according to the seating position.

  In addition, when the passenger is in the passenger seat, in the rear seat, in the passenger seat and in the rear seat, the seating pattern of the three passengers, "Sudden braking", "Narrow inter-vehicle distance", "Speed By changing the priority of the caring driving guide according to all combinations (three ways in total) with the three driving states of “too much”, it changes depending on the combination of the position of the seat where the passenger is sitting and the driving state It is possible to deal with the magnitude of discomfort of passengers.

Next, a fifth embodiment will be described.
In the present embodiment, the processing content of the sudden braking degree calculation determination unit 9 in the fourth embodiment is changed, and the description of the overall configuration is omitted.
The sudden braking degree calculation determination unit 9 estimates the cause of sudden braking based on the deceleration calculated by the deceleration calculation unit 5.

Next, the caring driving guide process will be described.
18 and 19 are diagrams showing the flow of the caring driving guide process.
Steps 500 to 507 are the same as steps 100 to 107 in FIG. 2 of the first embodiment, and a description thereof will be omitted.
In step 508, the sudden braking degree calculation determination unit 9 estimates the cause of sudden braking. When the maximum value of the sudden braking degree is 6.0 [m / s ² ] or more, it is estimated that the cause is emergency avoidance. When the maximum value of the sudden braking degree is less than 6.0 [m / s ² ] and the minimum value is less than 1.0 [m / s ² ], the fluctuation of the deceleration is large and the timing of the intersection signal is set. Presumed that it was mistaken. When the maximum value of the sudden braking degree is less than 6.0 [m / s ² ] and the minimum value is 1.0 [m / s ² ] or more, it is simply estimated that the brake timing is late. .
Steps 509 to 512 are the same as steps 108 to 111 in the first embodiment, and a description thereof will be omitted.

In step 513, the passenger detection unit 40 detects the presence or absence of the passenger and the seating position.
In step 514, the priority setting unit 41 uses the passenger presence / absence information and seating position information detected in step 513 and the sudden brake cause determination result in step 508 based on the priority setting table shown in FIG. Set the priority of caring driving guide.
When a passenger is present in the passenger seat, the passenger can visually recognize the front of the vehicle and predict sudden braking for emergency avoidance. Therefore, even if a sudden braking operation for emergency avoidance is performed, a relatively uncomfortable feeling is not felt, and therefore the priority of presentation is made the lowest.
Further, since it is possible to recognize that the signal is approaching by visually recognizing the front of the host vehicle, the passenger feels a strong discomfort when a sudden braking operation is performed due to misreading the signal timing. Therefore, the priority of presentation is made highest.
Since the passenger can visually recognize the front of the host vehicle and recognize the distance from the preceding vehicle, the passenger feels uncomfortable when a sudden braking operation is performed due to the late brake timing. Therefore, the priority of presentation is set to normal.

On the other hand, if there is a passenger in the rear seat, the passenger cannot visually see the front of the vehicle, so if the brake operation for emergency avoidance is performed, the passenger will experience an unexpected brake operation and strong discomfort Will feel. Therefore, the priority of presentation is made highest.
In addition, since the passenger cannot recognize that he is approaching the intersection signal, if a sudden braking operation is performed due to misreading the signal timing, the passenger will experience an unexpected braking operation and a strong discomfort. You will feel it. Therefore, the priority of presentation is made highest.
When a sudden braking operation is performed due to the late brake timing, the passenger does not feel discomfort relatively, so the priority of presentation is set to the lowest.
Further, when there are passengers in the passenger seat and the rear seat, a value having a higher priority is set in each presentation item when there is a passenger in the passenger seat or when there is a passenger in the rear seat.
In FIG. 20, the number of star marks is proportional to the priority level.

In step 515, the passenger discomfort degree calculation unit 12 determines the number of times that the passenger is determined to be uncomfortable by the sudden braking degree discomfort determination in step 507, the excessive speed discomfort determination in step 510, and the narrow inter-vehicle distance degree discomfort determination in step 512. The sum is obtained, and the obtained result is calculated as passenger discomfort.
In step 516, the display graph creating unit 13 </ b> C determines the sudden braking degree calculated in step 506, the overspeeding degree calculated in step 509, and the narrowness calculated in step 511 based on the priority set in step 514. Based on the inter-vehicle distance degree and the passenger discomfort degree calculated in step 515, image data of a display graph for visual presentation to the driver is created and output to the display unit 3.
In step 517, the display unit 3 displays a display graph based on the data input from the display graph creation unit 13C and presents it to the driver.

FIG. 21 shows a display screen of the display unit.
On the display screen of the display unit 3, three items of a sudden brake degree, an excessive speed degree, and a narrow inter-vehicle distance degree that are presented to the driver are presented with high priority items.
Here, it is assumed that the cause of sudden braking is a signal misreading, and there is a passenger in the passenger seat. Therefore, based on the priority setting table shown in FIG. 20, three items of “sudden braking”, “near inter-vehicle distance” and “overspeed” are preferentially displayed, that is, sudden braking, narrow inter-vehicle distance degree and speed. Three items of the degree of overloading are displayed in a large size among large, medium and small display sizes.

When all the processes are completed, the process returns to step 500 and the above processes are repeated.
In this embodiment, steps 500 to 506, 508, 509, and 511 constitute the driving state detecting means in the present invention, and steps 507, 510, 512, and 515 constitute the passenger discomfort detecting means in the present invention. . Steps 514, 516, and 517 constitute notification means in the present invention. Step 513 constitutes passenger detection means in the present invention.

  The present embodiment is configured as described above. In the driving state in which the brake is suddenly applied, the case where the brake is suddenly applied for emergency avoidance, the case where the signal brake is mistakenly applied and the brake is applied suddenly, and the brake is applied. By changing the priority of the items presented in the caring driving guide when the start timing is late and sudden braking is applied, the passenger sits in the position of the seat where the passenger is sitting and the driving state of `` sudden braking '' It is possible to deal with the magnitude of passenger discomfort that varies depending on the combination of causes.

It is a figure which shows the whole structure in a 1st Example. It is a figure which shows the flow of the caring driving | operation guide process in a 1st Example. 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 example of a display image of a display part. It is a figure which shows the whole structure in a 2nd Example. It is a figure which shows the flow of the caring driving | operation guide process in a 2nd Example. It is a figure which shows a reproduction | regeneration music selection table | surface. It is a figure which shows the whole structure in a 3rd Example. It is a figure which shows the flow of the caring driving | operation guide process in a 3rd Example. It is a figure which shows the flow of the caring driving | operation guide process in a 3rd Example. 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 in a 4th Example. It is a figure which shows the flow of the caring driving | operation guide process in a 4th Example. It is a figure which shows the flow of the caring driving | operation guide process in a 4th Example. It is a figure which shows a priority setting table | surface. 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 caring driving | operation guide process in a 5th Example. It is a figure which shows the flow of the caring driving | operation guide process in a 5th Example. It is a figure which shows a priority setting table | surface. It is a figure which shows the example of a display image of a display part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle speed detection part 2 Inter-vehicle distance detection part 3 Display part 4, 4A, 4B, 4C Car-mounted computer 5 Deceleration calculation part 6 Maximum vehicle speed calculation part 7 Average vehicle speed calculation part 8 Average inter-vehicle distance calculation part 9 Sudden brake degree calculation determination part 10 Excessive speed calculation calculation determination unit 11 Narrow inter-vehicle distance calculation calculation determination unit 12 Passenger discomfort calculation unit 13, 13B, 13C Display graph creation unit 20 Music reproduction unit 21 Presented music selection unit 30 Jerk calculation unit 31 Driver discomfort calculation 40 Passenger detection unit 41 Priority setting unit

Claims (13)

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;
A caring driving guide device comprising: an informing means for informing a driver of a detection result of the passenger discomfort detecting means. The caring driving guide device according to claim 1, wherein the notifying unit further notifies the driver of the driving state detected by the driving state detecting unit. Passenger detection means for determining the sitting position of the passenger,
The caring driving according to claim 2, wherein the notifying unit changes a display state of a driving state to be informed to the driver according to a seating position of the passenger detected by the passenger detecting unit. Guide device. The change of the display state of the driving state performed by the notification means is as follows:
In accordance with the passenger's sitting position detected by the passenger detection means, the priority of the item of the driving state to be notified to the driver is determined, and the driving state to be notified to the driver based on the priority The caring driving guide device according to claim 3, wherein the display mode is changed for each item. The driving state detected by the driving state detecting means is at least one of three items of sudden braking, narrow inter-vehicle distance, and excessive speed,
The caring driving guide device according to any one of claims 2 to 4, wherein the item of the driving state notified by the notifying unit corresponds to the item of the driving state detected by the driving state detecting unit. 6. The care according to any one of claims 3 to 5, wherein the passenger detection means determines whether the passenger is in the passenger seat, the rear seat, or the passenger seat and the rear seat. Driving guide device. When the driving state detecting means detects that the driving state is uncomfortable for the passenger for the item of sudden braking, it further detects the cause of sudden braking,
The notification means determines a priority in the item of the brake of the driving state to be notified to the driver based on the cause of the sudden braking, and the brake of the driving state to be notified to the driver based on the priority is determined. The caring driving guide device according to claim 5 or 6, wherein a display mode of the item is changed. The driving state detecting means detects at least one of a sudden braking cause, a case of emergency avoidance, a case where a signal timing is mistaken, and a case where a braking start timing is delayed. Item 8. A caring driving guide device according to Item 7. 9. The informing means according to any one of claims 2 to 8, wherein the informing means informs the driver of the passenger comfort zone corresponding to the informing driving state together with the informing of the driving state detected by the driving state detecting means. The caring driving guide device according to claim 1. The notification means notifies the driver of the detection result of the passenger discomfort detection means or the driving state detected by the driving state detection means by a radar chart, bar graph, pie chart, or line graph. The caring driving guide device according to any one of claims 1 to 9. 11. The notification unit according to claim 1, wherein the notification unit notifies the driver of a detection result of the passenger discomfort detection unit or a driving state detected by the driving state detection unit by sound. The caring driving guide apparatus according to 1. Based on the driving state detected by the driving state detection means, comprising a driver discomfort detection means for detecting whether the driving state is uncomfortable for the driver,
The notification means further notifies the driver so that a correlation between a detection result of the driver discomfort detection means and a detection result of the passenger discomfort detection means can be understood. The caring driving guide device according to any one of 11. A caring driving guide method characterized by detecting a driving state, detecting whether the driving state is uncomfortable for the passenger based on the detected driving state, and notifying the driver of the detection result.

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