JP2018077585A - Information presentation device, information presentation method, and information presentation program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information presentation device, information presentation method, and information presentation program for appropriately supporting safety driving.SOLUTION: An information presentation device 12 includes: a visual load estimation section 30 for estimating a visual load on a driver from a visual driving environment; an auditory load estimation section 32 for estimating an auditory load on a driver from an auditory driving environment; a selection section 34 for respectively calculating an index value expressing a deceleration degree of a vehicle speed corresponding to a visual load when information is presented by displaying and also an index value corresponding to an auditory load when information is presented by sound, and selecting a presentation with a larger deceleration degree expressed by a calculated index value as an information presentation method between a presentation by displaying and a presentation by sound; and a presentation section 36 for presenting predetermined presentation information to a driver in accordance with a selected presentation method.SELECTED DRAWING: Figure 5

Description

  The disclosed technology relates to an information presentation device, an information presentation method, and an information presentation program.

  2. Description of the Related Art Conventionally, a technique for calculating a driver's ideal line-of-sight probability distribution from information about the host vehicle and the surroundings of the host vehicle and past driver's line-of-sight distribution is known. In this technique, when a certain difference or more occurs between the current driver's gaze distribution and the calculated ideal gaze probability distribution, it is determined to be dangerous.

  In addition, a technique for evaluating a mode of presenting information based on a detection result of a driver's physical reaction to information presented to a driver of a vehicle is known.

JP-A-2005-267108 JP 2014-048760 A

  By the way, in order to support safe driving of a vehicle, it is conceivable to present information by display to the visual sense of the driver of the vehicle and present information by voice to the auditory sense of the driver.

  On the other hand, in a high visual load environment where the driver needs to turn his gaze around the vehicle, such as when the driving road is a sharp curve road or a road with heavy traffic, Presentation may be annoying. In addition, a driver may feel annoying presentation of information for hearing in an environment with a high auditory load such as listening to music Compact Disc (CD) and radio.

  If information is presented to the driver's vision or hearing without considering the driver's visual and auditory loads, the driver may feel annoying the presentation of information and may not follow the presented information. there were. Therefore, in this case, safe driving support is not properly implemented for the driver.

  An object of the disclosed technology is to appropriately support safe driving as one aspect.

  As one aspect, the disclosed technology estimates the driver's visual load from the visual driving environment, and estimates the driver's auditory load from the auditory driving environment. Also, an index value indicating the degree of deceleration of the vehicle speed corresponding to the visual load when information is presented by display and the index value corresponding to the auditory load when information is presented by voice are calculated. In addition, of the presentation by display and the presentation by voice, the presentation with the larger degree of deceleration represented by the calculated index value is selected as the information presentation method, and the presentation information predetermined by using the selected presentation method is selected. To the driver.

  As one aspect, it has the effect that support for safe driving can be appropriately implemented.

It is a graph which shows an example of the relationship between the vehicle speed after presentation of information when information is presented by display to the driver, and the degree of annoyance felt by the driver for the presented information. . It is a graph which shows an example of the relationship between a driver | operator's visual load and the annoyance degree which the driver | operator felt when the information by display was performed. It is a graph which shows an example of the relationship between a driver | operator's auditory load, and the annoyance degree which the driver | operator felt when the information presentation by an audio | voice was performed. 1 is a block diagram illustrating a schematic configuration of a vehicle according to an embodiment. It is a functional block diagram of the information presentation apparatus concerning an embodiment. It is a figure which shows an example of a visual load table. It is a figure which shows an example of an auditory load table. It is a graph with which it uses for description of the calculation formula which calculates the predicted value of a vehicle speed from auditory load. It is a graph with which it uses for description of the update process of the calculation formula which calculates the predicted value of a vehicle speed from auditory load. It is a block diagram which shows schematic structure of the computer which functions as an information presentation apparatus which concerns on embodiment. It is a flowchart which shows an example of the information presentation process which concerns on embodiment. It is a figure which shows an example of the visual load table which concerns on a modification. It is a figure which shows an example of the visual load table which concerns on a modification. It is a figure which shows an example of the visual load table which concerns on a modification. It is a figure which shows an example of the visual load table which concerns on a modification.

  Hereinafter, an example of an embodiment of the disclosed technology will be described in detail with reference to the drawings.

  First, before explaining the details of the embodiment, referring to FIGS. 1 to 3, the visual load and auditory load of the driver of the vehicle, and the case where information is presented by display and the case where information is presented by voice A relationship with the degree of deceleration of the vehicle speed will be described.

  In addition, FIG. 1 shows the vehicle speed after the presentation of information when information is presented to the driver at the same vehicle speed, and the degree of annoyance felt by the driver with respect to the presented information. An example of the experimental result of the relationship is shown. Also, the information presented to the driver here is information that prompts the driver to decelerate, such as “There is a curve ahead” and “This is a temporary stop”. Further, the troublesomeness shown in FIG. 1 shows, for example, evaluation values in five stages from “0” representing “not troublesome at all” to “4” representing “very troublesome”, and the larger the numerical value, the driver Indicates annoying.

  FIG. 2 shows an example of the relationship between the visual load of the driver and the degree of annoyance felt by the driver when information is displayed by display. FIG. 3 shows an example of the relationship between the driver's auditory load and the annoyance felt by the driver when information is presented by voice.

  As shown in FIG. 1, when information that prompts deceleration is presented, the vehicle speed increases, that is, the degree of deceleration decreases as the degree of annoyance felt by the driver with respect to the presented information increases. I understand. In addition, although FIG. 1 shows the case where information is presented by display to the driver, the vehicle speed after the presentation of information when the information is presented by voice and the presented information are shown. On the other hand, the relationship with the degree of annoyance felt by the driver has a similar tendency.

  On the other hand, as shown in FIG. 2, the driver tends to feel that the information presented by the display is more troublesome as the visual load is higher. In addition, as shown in FIG. 3, the driver tends to feel more troublesome with respect to information presented by voice as the auditory load is higher.

  Therefore, in this embodiment, driving assistance for the driver is selected by presenting information by selecting a presentation method that is less troublesome for the driver based on the visual load and auditory load of the driver. I do.

  Next, the configuration of the vehicle 10 according to the present embodiment will be described with reference to FIG. As shown in FIG. 4, the vehicle 10 includes an information presentation device 12, a Global Positioning System (GPS) receiving unit 14, a volume measuring unit 16, a vehicle speed sensor 18, a display unit 20, and a speaker 22. An example of the information presentation device 12 is an electronic control unit (ECU). The GPS receiving unit 14, the sound volume measuring unit 16, the vehicle speed sensor 18, the display unit 20, and the speaker 22 are each connected to the information presentation device 12, and can transmit / receive information to / from the information presentation device 12.

  The GPS receiver 14 receives signals from three or more GPS satellites, thereby positioning the position information of the current position of the vehicle 10 (for example, the latitude and longitude of the current position of the vehicle 10). The information is output to the information presentation device 12. Instead of the GPS receiver 14, another device that can identify the position information of the vehicle 10 may be used.

  The volume measuring unit 16 measures the volume in the vehicle 10 and outputs the measured volume in the vehicle to the information presentation device 12. An example of the volume measuring unit 16 is a microphone. The vehicle speed sensor 18 detects the vehicle speed of the vehicle 10 and outputs the detected vehicle speed to the information presentation device 12. The display unit 20 displays information input from the information presentation device 12. An example of the display unit 20 is a display of a car navigation system. The speaker 22 outputs the information input from the information presentation device 12 as sound.

  Next, a functional configuration of the information presentation apparatus 12 according to the present embodiment will be described with reference to FIG. As illustrated in FIG. 5, the information presentation device 12 includes a visual load estimation unit 30, an auditory load estimation unit 32, a selection unit 34, a presentation unit 36, and an update unit 38. Further, map information 40, a visual load table 42, and an auditory load table 44 are stored in a predetermined storage area of the information presentation device 12.

  The map information 40 stores information related to the road according to the position indicated by the latitude and longitude.

  The visual load table 42 is a table used by the visual load estimation unit 30 to estimate the driver's visual load. FIG. 6 shows an example of the visual load table 42. As shown in FIG. 6, the visual load table 42 stores the visual load level and the road width [m]. The visual load level represents the degree of visual load. The larger the visual load level, the higher the visual load. The road width range stores a range of road widths without duplication. As the visual load level, a larger value is stored as the road width is narrower. That is, the narrower the road width, the higher the driver's visual load. Needless to say, the number of stages of the visual load level and the range of the road width corresponding to each visual load level are not limited to the example shown in FIG.

  The auditory load table 44 is a table used by the auditory load estimation unit 32 to estimate the driver's auditory load. FIG. 7 shows an example of the auditory load table 44. As shown in FIG. 7, the auditory load table 44 stores an auditory load level and a volume [dbA]. The auditory load level represents the degree of the auditory load, and the greater the value of the auditory load level, the higher the auditory load. The volume column stores the volume ranges without duplication. In addition, a larger value is stored in the auditory load level as the volume increases. That is, the higher the volume, the higher the driver's auditory load. Needless to say, the number of steps of the auditory load level and the range of the volume corresponding to each auditory load level are not limited to the example shown in FIG.

  The visual load estimation unit 30 estimates the driver's visual load from the visual driving environment. In the present embodiment, the visual load estimation unit 30 acquires the position information of the vehicle 10 from the GPS reception unit 14. Further, the visual load estimation unit 30 uses the map information 40 to acquire a road width corresponding to the acquired position information. And the visual load estimation part 30 estimates a driver | operator's visual load by referring the visual load table 42 and specifying the visual load level corresponding to the acquired road width.

  The auditory load estimator 32 estimates the driver's auditory load from the auditory driving environment. In the present embodiment, the auditory load estimation unit 32 acquires the volume in the vehicle 10 from the volume measurement unit 16. And the auditory load estimation part 32 estimates the driver | operator's auditory load by referring to the auditory load table 44 and specifying the auditory load level corresponding to the acquired volume in the vehicle.

The selection unit 34 calculates an index value representing the degree of deceleration of the vehicle speed corresponding to the visual load estimated by the visual load estimation unit 30 when information is presented to the driver by display. In the present embodiment, the selection unit 34 predicts the vehicle speed corresponding to the visual load estimated by the visual load estimation unit 30 when information is presented to the driver by display according to the following equation (1). Is calculated as an index value representing the degree of deceleration of the vehicle speed.
vs (x) = ax + b (1)
Here, vs (x) in the equation (1) is a predicted value of the vehicle speed, x is a visual load estimated by the visual load estimation unit 30, and a and b are coefficients.

  Note that the information presentation apparatus 12 according to the present embodiment determines the initial values of the coefficients a and b in advance as shown below. For example, the information presenting device 12 determines the visual load level when the information is presented to each of a predetermined number of drivers and the vehicle speed after the information is presented by an experiment using an actual vehicle 10. Acquire measured values. And the information presentation apparatus 12 approximates the acquired visual load level and the measured value of the vehicle speed to a linear expression by the least square method or the like, and obtains coefficients a and b.

In addition, the selection unit 34 calculates the index value corresponding to the auditory load estimated by the auditory load estimation unit 32 when information is presented to the driver by voice. In the present embodiment, the selector 34 predicts the vehicle speed corresponding to the auditory load estimated by the auditory load estimator 32 when information is presented by voice to the driver according to the following equation (2). Is calculated as an index value representing the degree of deceleration of the vehicle speed.
va (y) = cy + d (2)
Here, va (y) in the equation (2) is a predicted value of the vehicle speed, y is an auditory load estimated by the auditory load estimation unit 32, and c and d are coefficients.

  In the information presentation apparatus 12 according to the present embodiment, the initial values of the coefficients c and d are determined in advance as shown below, similarly to the coefficients a and b. For example, the information presenting device 12 determines, based on an experiment using the actual vehicle 10, the hearing load level when the information is presented to each of a predetermined number of drivers by voice and the vehicle speed after the information is presented. Acquire measured values. Then, the information presentation device 12 approximates the acquired auditory load level and the measured value of the vehicle speed to a linear expression by the least square method or the like as shown in FIG. 8 as an example, and obtains coefficients c and d. Although FIG. 8 shows the correspondence between the vehicle speed and the auditory load level, the correspondence between the vehicle speed and the visual load level is the same.

  Note that the correspondence relationship between the visual load and the vehicle speed is not limited to the primary expression shown in the above expression (1), and may be another arithmetic expression such as a secondary expression or other correspondence such as a lookup table. It is good also as a format showing a relationship. Further, the correspondence relationship between the auditory load and the vehicle speed is not limited to the primary expression shown in the above expression (2), and may be another arithmetic expression such as a secondary expression or other correspondence such as a lookup table. It is good also as a format showing a relationship.

  And the selection part 34 selects the presentation with the slower predicted value of the calculated vehicle speed, ie, the one with the larger degree of deceleration, as an information presentation method among the presentation by display and the presentation by voice. Note that, in the present embodiment, the selection unit 34 describes a case of selecting presentation by display when the predicted values of the vehicle speed calculated for each of the visual load and the auditory load are the same value, but the present invention is not limited to this. . In this case, the selection unit 34 may select presentation by voice.

  The presentation unit 36 presents predetermined presentation information to the driver according to the presentation method selected by the selection unit 34. In the present embodiment, when presentation by display is selected by the selection unit 34, the presentation unit 36 outputs presentation information to the display unit 20. Thereby, a screen corresponding to the presentation information is displayed on the display unit 20. On the other hand, when the voice presentation is selected by the selection unit 34, the presentation unit 36 outputs the presentation information to the speaker 22. Thereby, a sound corresponding to the presentation information is emitted from the speaker 22.

  Note that the predetermined presentation information is predetermined according to the situation of the vehicle 10 such as “there is a curve ahead” such as when the distance between the current position of the vehicle 10 and the curve is equal to or less than a predetermined value. Further, the information prompts the driver to decelerate. Further, as an example of the presentation information, there is information such as “This is a temporary stop” when the distance between the current position of the vehicle 10 and the position on the road where the temporary stop is required is equal to or less than a predetermined value.

  Further, as shown in FIGS. 2 and 3, the degree of annoyance increases as the visual load increases, and the degree of annoyance increases as the auditory load increases depends on the driver.

  Therefore, the update unit 38 measures the visual load estimated by the visual load estimation unit 30 and the index value after presenting the presentation information to the driver when the selection unit 34 selects display by display. The correspondence relationship between the visual load and the index value is updated using the value. In addition, when the voice presentation is selected by the selection unit 34, the update unit 38 measures the auditory load estimated by the auditory load estimation unit 32 and the index value after presenting the presentation information to the driver. The correspondence relationship between the auditory load and the index value is updated using the value.

  In the present embodiment, when the presentation unit 36 presents the presentation information to the driver by display, the update unit 38 acquires the vehicle speed after the presentation information is presented to the driver from the vehicle speed sensor 18. In this case, the update unit 38 updates the coefficients a and b in the above equation (1) using the visual load when the selection unit 34 selects the presentation by display and the acquired vehicle speed. Specifically, the update unit 38 adds the visual load and the acquired vehicle speed when the selection unit 34 selects presentation by display to the visual load and vehicle speed data acquired up to the present time. Then, the updating unit 38 updates the coefficients a and b by approximating the visual load and the vehicle speed to which the data has been added to a linear expression by the least square method or the like.

  On the other hand, when the presentation unit 36 presents the presentation information to the driver by voice, the update unit 38 acquires the vehicle speed after the presentation information is presented to the driver from the vehicle speed sensor 18. In this case, the updating unit 38 updates the coefficients c and d in the above equation (2) using the auditory load when the selection unit 34 selects presentation by voice and the acquired vehicle speed. Specifically, as illustrated in FIG. 9 as an example, the update unit 38 acquires the auditory load when the selection unit 34 selects the presentation by voice to the auditory load and vehicle speed data acquired up to the present time, and acquires Add the vehicle speed. Then, the updating unit 38 updates the coefficients c and d by approximating the auditory load and the vehicle speed to which the data has been added to a linear expression by the least square method or the like. Although FIG. 9 shows the update of the correspondence between the vehicle speed and the auditory load, the same applies to the update of the correspondence between the vehicle speed and the visual load.

  The information presentation device 12 can be realized, for example, by a computer 60 shown in FIG. The computer 60 includes a central processing unit (CPU) 61, a memory 62 as a temporary storage area, and a nonvolatile storage unit 63. The computer 60 also includes an input / output I / F 64 to which the GPS receiving unit 14, the sound volume measuring unit 16, the vehicle speed sensor 18, the display unit 20, the speaker 22, and the like are connected. The computer 60 also includes a read / write (R / W) unit 65 that controls reading and writing of data with respect to the recording medium 68 and a network I / F 66 connected to the network. The CPU 61, the memory 62, the storage unit 63, the input / output I / F 64, the R / W unit 65, and the network I / F 66 are connected to each other via a bus 67.

  The storage unit 63 can be realized by a hard disk drive (HDD), a solid state drive (SSD), a flash memory, or the like. An information presentation program 70 for causing the computer 60 to function as the information presentation device 12 is stored in the storage unit 63 as a storage medium. The information presentation program 70 includes a visual load estimation process 71, an auditory load estimation process 72, a selection process 73, a presentation process 74, and an update process 75. The storage unit 63 includes an information storage area 76 in which the map information 40, the visual load table 42, and the auditory load table 44 are stored.

  The CPU 61 reads out the information presentation program 70 from the storage unit 63 and expands it in the memory 62, and executes the process of the information presentation program 70. The CPU 61 operates as the visual load estimation unit 30 illustrated in FIG. 5 by executing the visual load estimation process 71. The CPU 61 operates as the auditory load estimation unit 32 illustrated in FIG. 5 by executing the auditory load estimation process 72. The CPU 61 operates as the selection unit 34 illustrated in FIG. 5 by executing the selection process 73. The CPU 61 operates as the presentation unit 36 illustrated in FIG. 5 by executing the presentation process 74. The CPU 61 operates as the update unit 38 illustrated in FIG. 5 by executing the update process 75. As a result, the computer 60 that has executed the information presentation program 70 functions as the information presentation device 12. Note that the CPU 61 that executes the process of the information presentation program 70 is hardware.

  The functions realized by the information presentation program 70 can also be realized by, for example, a semiconductor integrated circuit, more specifically an application specific integrated circuit (ASIC).

  Next, the operation of the information presentation device 12 according to the present embodiment will be described. When the information presentation apparatus 12 executes the information presentation program 70, the information presentation process shown in FIG. 11 is executed. The information presentation process shown in FIG. 11 is executed by the CPU 61 at the timing of presenting information prompting the driver to decelerate, for example, when the distance between the current position of the vehicle 10 and the curve is equal to or less than a predetermined value.

  In step S <b> 10 of the information presentation process shown in FIG. 11, the visual load estimation unit 30 acquires the position information of the vehicle 10 from the GPS reception unit 14. In the next step S12, the visual load estimation unit 30 uses the map information 40 to acquire the road width corresponding to the position information acquired in step S10. In the next step S14, the visual load estimating unit 30 refers to the visual load table 42 and specifies the visual load level corresponding to the road width acquired in step S12, thereby estimating the visual load of the driver. In the next step S16, the selection unit 34 calculates a predicted value of the vehicle speed corresponding to the visual load estimated in step S14 according to the above equation (1).

  In the next step S <b> 18, the auditory load estimation unit 32 acquires the volume in the vehicle 10 from the volume measurement unit 16. In the next step S20, the auditory load estimation unit 32 refers to the auditory load table 44 and estimates the auditory load level of the driver by specifying the auditory load level corresponding to the volume in the vehicle acquired in step S18. . In the next step S22, the selection unit 34 calculates a predicted value of the vehicle speed corresponding to the auditory load estimated in step S20 according to the above equation (2).

  For example, when the CPU 61 is a multi-core processor or a processor capable of parallel processing such as a multiprocessor, the processing from step S10 to step S16 and the processing from step S18 to step S22 are executed in parallel. May be.

  In the next step S24, the selection unit 34 determines whether or not the predicted vehicle speed value corresponding to the visual load calculated in step S16 is equal to or lower than the predicted vehicle speed value corresponding to the auditory load calculated in step S22. judge. If this determination is affirmative, the process proceeds to step S26. If the determination is negative, the process proceeds to step S32.

  In step S26, the presentation unit 36 outputs predetermined presentation information to the display unit 20 as described above. In the next step S28, the update unit 38 acquires the vehicle speed from the vehicle speed sensor 18. In the next step S30, as described above, the update unit 38 is used to calculate a predicted value of the vehicle speed corresponding to the visual load, using the visual load estimated in step S14 and the vehicle speed acquired in step S28. The coefficients a and b in the calculation formula (the above formula (1)) are updated. When the process of step S30 ends, the information presentation process ends.

  On the other hand, in step S <b> 32, the presentation unit 36 outputs predetermined presentation information to the speaker 22 as described above. In the next step S <b> 34, the update unit 38 acquires the vehicle speed from the vehicle speed sensor 18. In the next step S36, as described above, the updating unit 38 is used to calculate a predicted value of the vehicle speed corresponding to the auditory load, using the auditory load estimated in step S20 and the vehicle speed acquired in step S34. The coefficients c and d of the calculation formula (the above formula (2)) are updated. When the process of step S36 ends, the information presentation process ends.

  In Table 1, when multiple presentations of information are presented to a plurality of drivers, all presentation of information is performed by voice, and display or voice presentation according to the present embodiment is selectively performed. In this case, the average value of the vehicle speed after the information is presented is shown. In Table 2, when multiple presentations of information are presented to a plurality of drivers, all presentation of information by voice, and display or voice presentation according to the present embodiment are selectively performed. In this case, the average value of the degree of annoyance felt by the driver after the presentation of information is shown. In addition, the numerical value of the troublesomeness degree of Table 2 is the same numerical value as the five-stage evaluation value shown in FIG.

  As shown in Table 1, according to the present embodiment, the vehicle speed after the presentation of information is slower than when all information is presented by display and when all information is presented by voice. That is, the degree of deceleration increases. Further, as shown in Table 2, according to the present embodiment, compared to the case where all information is presented by display and the case where all information is presented by voice, the driver is present after the information is presented. The degree of annoyance to be felt is reduced.

  As described above, according to the present embodiment, of the presentation by display and the presentation by voice, the presentation with the larger degree of deceleration represented by the calculated index value is selected as the information presentation method. Then, predetermined presentation information is presented to the driver according to the selected presentation method. That is, the presentation information is presented to the driver by a presentation method with a lower degree of annoyance felt by the driver. Accordingly, the driver is more likely to follow the presented information, and thus safe driving support can be appropriately implemented.

  Further, according to the present embodiment, either the visual load or the auditory load corresponding to the selected presentation method using the vehicle speed or the like after the presentation information is presented to the driver by the selected presentation method and the above-mentioned Update the correspondence with the index value. Therefore, safe driving support can be appropriately implemented according to the driver.

  In addition, although the said embodiment demonstrated the case where the road width of the road where the vehicle 10 is drive | driving was applied as a visual driving environment, it is not limited to this. For example, it is good also as a form which applies the congestion degree of the road where the vehicle 10 is drive | working as a visual driving environment. An example of the visual load table 42 in this embodiment is shown in FIG. In this embodiment, as shown in FIG. 12, the congestion degree ranges are stored in the congestion degree column without duplication.

  In this example, the visual load estimation unit 30 acquires the position information of the vehicle 10 from the GPS reception unit 14. Further, the visual load estimation unit 30 uses the map information 40 to acquire the traffic capacity of the road corresponding to the acquired position information. In addition, the visual load estimation unit 30 acquires the traffic volume of the road corresponding to the acquired position information from an external system such as a road traffic information communication system. Then, the visual load estimation unit 30 refers to the visual load table 42 and specifies the visual load level corresponding to the degree of congestion obtained by dividing the acquired traffic volume by the traffic capacity, thereby determining the visual load of the driver. presume.

  Further, for example, as a visual driving environment, it is possible to apply the weather of the area where the vehicle 10 is traveling. An example of the visual load table 42 in this embodiment is shown in FIG. In this embodiment, as shown in FIG. 13, ranges of precipitation per hour are stored in the precipitation column as an example of weather without duplication.

  In this example, the visual load estimation unit 30 acquires the position information of the vehicle 10 from the GPS reception unit 14. Further, the visual load estimation unit 30 acquires the amount of precipitation per hour in the area corresponding to the acquired position information from the external system. And the visual load estimation part 30 estimates a driver | operator's visual load by referring the visual load table 42 and specifying the visual load level corresponding to the acquired precipitation. In this embodiment, snowfall may be used instead of precipitation.

  Further, for example, the present time may be applied as a visual driving environment. An example of the visual load table 42 in this embodiment is shown in FIG. In this example, as shown in FIG. 14, the range of the time zone within one day is stored without duplication.

  In this embodiment, the visual load estimation unit 30 acquires the current time by receiving a standard radio wave. And the visual load estimation part 30 estimates a driver | operator's visual load by referring the visual load table 42 and specifying the visual load level corresponding to the acquired present time.

  Further, for example, as a visual driving environment, it is possible to apply a curve of a road on which the vehicle is traveling. An example of the visual load table 42 in this embodiment is shown in FIG. In this embodiment, as shown in FIG. 15, the range of the curve radius indicating the degree of curve of the road curve is stored without duplication.

  In this example, the visual load estimation unit 30 acquires the position information of the vehicle 10 from the GPS reception unit 14. The visual load estimation unit 30 also uses the map information 40 to calculate the curve radius of the road corresponding to the acquired position information. Then, the visual load estimation unit 30 estimates the driver's visual load by referring to the visual load table 42 and specifying the visual load level corresponding to the calculated curve radius.

  Further, for example, as a visual driving environment, an inter-vehicle distance between the vehicle 10 and a vehicle traveling in front of the vehicle 10 may be applied. In this case, the visual load estimation unit 30 calculates the inter-vehicle distance from outputs such as millimeter wave radar and Laser Imaging Detection and Ranging (LIDER). The visual load estimation unit 30 estimates that the visual load is higher as the calculated inter-vehicle distance is shorter.

  Further, for example, as a visual driving environment, the road width of the road on which the vehicle 10 is traveling, the degree of congestion of the road on which the vehicle 10 is traveling, the weather in the region in which the vehicle 10 is traveling, the time zone of the current time, the vehicle It is good also as a form which applies 2 or more of the curve state of the curve of the road 10 is driving | running | working. In this case, the visual load estimation unit 30 estimates the driver's visual load for each visual driving environment. And the form in which the selection part 34 calculates the predicted value of the vehicle speed corresponding to the highest visual load among each of the visual loads estimated by the visual load estimation part 30 is illustrated.

  Moreover, although the said embodiment demonstrated the case where the sound volume in the vehicle 10 was applied as an auditory driving environment, it is not limited to this. For example, a sound volume outside the vehicle 10 may be applied as an audible driving environment.

  Moreover, although the said embodiment demonstrated the case where the volume in the vehicle 10 of a vehicle 10 was measured using a microphone, it is not limited to this. For example, the volume in the vehicle may be estimated from the set value of the volume of a radio and a CD playback device.

  Moreover, although the said embodiment demonstrated the case where the vehicle speed after showing information with respect to a driver | operator was applied as an index value showing the degree of deceleration, it is not limited to this. For example, it is good also as a form which applies the deceleration rate represented by the ratio of the deceleration amount after showing the information with respect to the vehicle speed before showing information with respect to a driver | operator as an index value showing the degree of deceleration.

  Moreover, although the said embodiment demonstrated the case where the road width was acquired using the map information 40, it is not limited to this. For example, the front or rear of the vehicle 10 is photographed by an imaging device such as a camera, and a white line is detected from an image obtained by photographing. And it is good also as a form which calculates a road width using a detection result.

  Moreover, although the said embodiment demonstrated the aspect by which the information presentation program 70 was previously memorize | stored (installed) in the memory | storage part 63, it is not limited to this. The information presentation program 70 can also be provided in a form recorded on a recording medium such as a CD-ROM, DVD-ROM, USB memory, memory card or the like.

  Regarding the above embodiment, the following additional notes are disclosed.

(Appendix 1)
A visual load estimator for estimating a driver's visual load from a visual driving environment;
An auditory load estimator that estimates the driver's auditory load from the auditory driving environment;
By calculating the index value indicating the degree of deceleration of the vehicle speed corresponding to the visual load when the information is presented by display and the index value corresponding to the auditory load when the information is presented by voice, A selection unit that selects a presentation with a larger degree of deceleration represented by the calculated index value as a presentation method of information among presentation and presentation by voice;
A presentation unit that presents predetermined presentation information to the driver according to the selected presentation method;
An information presentation device.

(Appendix 2)
When presentation by display is selected as the presentation method, the estimated visual load and the visual load using the measured value of the index value after presenting the presentation information to the driver, When the correspondence relationship with the index value is updated and the presentation by voice is selected as the presentation method, the estimated auditory load and the index value after the presentation information is presented to the driver An update unit that updates a correspondence relationship between the auditory load and the index value using an actual measurement value,
The information presentation apparatus according to appendix 1, further comprising:

(Appendix 3)
The visual driving environment includes the width of the road on which the vehicle is traveling, the degree of congestion of the road on which the vehicle is traveling, the weather in the area in which the vehicle is traveling, the time zone of the current time, or the road on which the vehicle is traveling. The curve of the curve is
The information presentation apparatus according to Supplementary Note 1 or Supplementary Note 2.

(Appendix 4)
The visual driving environment includes the road width of the road on which the vehicle is traveling, the degree of congestion of the road on which the vehicle is traveling, the weather in the area in which the vehicle is traveling, the time zone of the current time, the road in which the vehicle is traveling 2 or more of the curve of the curve,
The visual load estimation unit estimates the visual load from each of the visual driving environments,
The selection unit calculates the index value corresponding to the highest visual load among the estimated visual loads.
The information presentation apparatus according to Supplementary Note 1 or Supplementary Note 2.

(Appendix 5)
The auditory driving environment is a volume in the vehicle,
The information presentation device according to any one of appendix 1 to appendix 4.

(Appendix 6)
Estimate the driver's visual load from the visual driving environment,
Estimate the driver's auditory load from the auditory driving environment,
By calculating the index value indicating the degree of deceleration of the vehicle speed corresponding to the visual load when the information is presented by display and the index value corresponding to the auditory load when the information is presented by voice, Of the presentation and the presentation by voice, the presentation with the larger degree of deceleration represented by the calculated index value is selected as the information presentation method,
Presenting predetermined presentation information to the driver using the selected presentation method,
The information presentation method with which a computer performs the process including this.

(Appendix 7)
When presentation by display is selected as the presentation method, the visual load and the index are calculated using the estimated visual load and the measured value of the index value after the presentation information is presented to the driver. When the correspondence with the value is updated and the presentation by voice is selected as the presentation method, the estimated auditory load and the measured value of the index value after the presentation information is presented to the driver Using, to update the correspondence between the auditory load and the index value,
The information presentation method according to attachment 6.

(Appendix 8)
The visual driving environment includes the width of the road on which the vehicle is traveling, the degree of congestion of the road on which the vehicle is traveling, the weather in the area in which the vehicle is traveling, the time zone of the current time, or the road on which the vehicle is traveling. The curve of the curve is
The information presentation method according to appendix 6 or appendix 7.

(Appendix 9)
The visual driving environment includes the road width of the road on which the vehicle is traveling, the degree of congestion of the road on which the vehicle is traveling, the weather in the area in which the vehicle is traveling, the time zone of the current time, the road in which the vehicle is traveling 2 or more of the curve of the curve,
Estimating the visual load from each of the visual driving environments;
Of the estimated visual loads, the index value corresponding to the highest visual load is calculated.
The information presentation method according to appendix 6 or appendix 7.

(Appendix 10)
The auditory driving environment is a volume in the vehicle,
The information presentation method according to any one of appendix 6 to appendix 9.

(Appendix 11)
Estimate the driver's visual load from the visual driving environment,
Estimate the driver's auditory load from the auditory driving environment,
By calculating the index value indicating the degree of deceleration of the vehicle speed corresponding to the visual load when the information is presented by display and the index value corresponding to the auditory load when the information is presented by voice, Of the presentation and the presentation by voice, the presentation with the larger degree of deceleration represented by the calculated index value is selected as the information presentation method,
Presenting predetermined presentation information to the driver using the selected presentation method,
The information presentation program which makes a computer perform the process containing this.

(Appendix 12)
When presentation by display is selected as the presentation method, the visual load and the index are calculated using the estimated visual load and the measured value of the index value after the presentation information is presented to the driver. When the correspondence with the value is updated and the presentation by voice is selected as the presentation method, the estimated auditory load and the measured value of the index value after the presentation information is presented to the driver Using, to update the correspondence between the auditory load and the index value,
The information presentation program according to attachment 11.

(Appendix 13)
The visual driving environment includes the width of the road on which the vehicle is traveling, the degree of congestion of the road on which the vehicle is traveling, the weather in the area in which the vehicle is traveling, the time zone of the current time, or the road on which the vehicle is traveling. The curve of the curve is
The information presentation program according to Supplementary Note 11 or Supplementary Note 12.

(Appendix 14)
The visual driving environment includes the road width of the road on which the vehicle is traveling, the degree of congestion of the road on which the vehicle is traveling, the weather in the area in which the vehicle is traveling, the time zone of the current time, the road in which the vehicle is traveling 2 or more of the curve of the curve,
Estimating the visual load from each of the visual driving environments;
Of the estimated visual loads, the index value corresponding to the highest visual load is calculated.
The information presentation program according to Supplementary Note 11 or Supplementary Note 12.

(Appendix 15)
The auditory driving environment is a volume in the vehicle,
15. The information presentation program according to any one of appendix 11 to appendix 14.

(Appendix 16)
Estimate the driver's visual load from the visual driving environment,
Estimate the driver's auditory load from the auditory driving environment,
By calculating the index value indicating the degree of deceleration of the vehicle speed corresponding to the visual load when the information is presented by display and the index value corresponding to the auditory load when the information is presented by voice, Of the presentation and the presentation by voice, the presentation with the larger degree of deceleration represented by the calculated index value is selected as the information presentation method,
Presenting predetermined presentation information to the driver using the selected presentation method,
The storage medium which memorize | stored the information presentation program which makes a computer perform the process containing this.

DESCRIPTION OF SYMBOLS 10 Vehicle 12 Information presentation apparatus 14 GPS receiving part 16 Volume measuring part 18 Vehicle speed sensor 20 Display part 22 Speaker 30 Visual load estimation part 32 Auditory load estimation part 34 Selection part 36 Presentation part 38 Update part 40 Map information 42 Visual load table 44 Auditory Load table 61 CPU
62 Memory 63 Storage 68 Recording medium 70 Information presentation program

Claims (7)

A visual load estimator for estimating a driver's visual load from a visual driving environment;
An auditory load estimator that estimates the driver's auditory load from the auditory driving environment;
By calculating the index value indicating the degree of deceleration of the vehicle speed corresponding to the visual load when the information is presented by display and the index value corresponding to the auditory load when the information is presented by voice, A selection unit that selects a presentation with a larger degree of deceleration represented by the calculated index value as a presentation method of information among presentation and presentation by voice;
A presentation unit that presents predetermined presentation information to the driver according to the selected presentation method;
An information presentation device. When presentation by display is selected as the presentation method, the estimated visual load and the visual load using the measured value of the index value after presenting the presentation information to the driver, When the correspondence relationship with the index value is updated and the presentation by voice is selected as the presentation method, the estimated auditory load and the index value after the presentation information is presented to the driver An update unit that updates a correspondence relationship between the auditory load and the index value using an actual measurement value,
The information presentation apparatus according to claim 1, further comprising: The visual driving environment includes the width of the road on which the vehicle is traveling, the degree of congestion of the road on which the vehicle is traveling, the weather in the area in which the vehicle is traveling, the time zone of the current time, or the road on which the vehicle is traveling. The curve of the curve is
The information presentation apparatus according to claim 1 or 2. The visual driving environment includes the road width of the road on which the vehicle is traveling, the degree of congestion of the road on which the vehicle is traveling, the weather in the area in which the vehicle is traveling, the time zone of the current time, the road in which the vehicle is traveling 2 or more of the curve of the curve,
The visual load estimation unit estimates the visual load from each of the visual driving environments,
The selection unit calculates the index value corresponding to the highest visual load among the estimated visual loads.
The information presentation apparatus according to claim 1 or 2. The auditory driving environment is a volume in the vehicle,
The information presentation apparatus according to any one of claims 1 to 4. Estimate the driver's visual load from the visual driving environment,
Estimate the driver's auditory load from the auditory driving environment,
By calculating the index value indicating the degree of deceleration of the vehicle speed corresponding to the visual load when the information is presented by display and the index value corresponding to the auditory load when the information is presented by voice, Of the presentation and the presentation by voice, the presentation with the larger degree of deceleration represented by the calculated index value is selected as the information presentation method,
Presenting predetermined presentation information to the driver using the selected presentation method,
The information presentation method with which a computer performs the process including this. Estimate the driver's visual load from the visual driving environment,
Estimate the driver's auditory load from the auditory driving environment,
By calculating the index value indicating the degree of deceleration of the vehicle speed corresponding to the visual load when the information is presented by display and the index value corresponding to the auditory load when the information is presented by voice, Of the presentation and the presentation by voice, the presentation with the larger degree of deceleration represented by the calculated index value is selected as the information presentation method,
Presenting predetermined presentation information to the driver using the selected presentation method,
The information presentation program which makes a computer perform the process containing this.