JP4973331B2 - Information provision device - Google Patents

Description

  The present invention relates to an information providing apparatus that provides information for reducing collision accidents.

  Conventionally, a communication device that acquires a vehicle speed of another vehicle located in the vicinity of the host vehicle and a vehicle history including a travel history (that is, a current position and a route traveled in the past), a vehicle speed of the host vehicle, and Based on the own vehicle state acquisition device that acquires the own vehicle state consisting of the travel history, the other vehicle state acquired by the communication device, and the own vehicle state acquired by the own vehicle state acquisition device. There is known an information providing apparatus that includes a control device that estimates the possibility of collision and notifies the estimated result (that is, the probability of collision).

Specifically, in the control device in this type of information providing device, both the own vehicle and other vehicles will continue to take the route indicated in the travel history (for example, if the past route is straight, the future route is also straight) The estimated route that is expected to travel in the future is derived. At the same time, when each vehicle continues to travel at the vehicle speed acquired by the own vehicle state acquisition device (or communication device) on the derived predicted route, each vehicle is expected to arrive after a predetermined time. Estimate the expected range. Furthermore, while deriving an area where the predicted range of the host vehicle and the predicted range of the other vehicle overlap as a point where the host vehicle and the other vehicle may collide (hereinafter referred to as a predicted collision point), The probability of collision is determined by the degree of overlap of the expected range. (For example, refer to Patent Document 1).
JP 2004-145479 A

  By the way, in the information providing apparatus described in Patent Document 1, for example, as shown in FIG. 6, both the own vehicle and the other vehicle indicate that the predicted route derived from the travel history is straight ahead, and the predicted collision point When an intersection located on the predicted route of the host vehicle is derived, the probability of collision between the host vehicle and another vehicle at the intersection is notified. However, if the vehicle is planning to make a left turn (or a right turn) before the intersection that has been designated as the collision prediction point (that is, before reaching the intersection), the above-described notification is unnecessary. It becomes.

  That is, in the information providing apparatus described in Patent Document 1, since the predicted route is derived using only the traveling history for both the own vehicle and the other vehicle, the prediction accuracy of the predicted route is low and unnecessary notification is made. This may cause discomfort to the driver of the vehicle.

  Therefore, an object of the present invention is to provide an information providing apparatus capable of reducing discomfort given to a driver.

In the information providing apparatus of the present invention made to achieve the above object, the own vehicle information acquisition means sets the planned route of the own vehicle to the destination in addition to the own vehicle running information related to the running state of the own vehicle. The other vehicle information acquisition means sets the scheduled route of the other vehicle to the destination in addition to the other vehicle traveling information related to the traveling state of the other vehicle. If so, route information indicating the planned route is also acquired. Then, the collision prediction estimating means determines that the own vehicle and the other vehicle are based on the own vehicle traveling information acquired by the own vehicle information acquiring means, the other vehicle traveling information acquired by the other vehicle information acquiring means, and the route information. While predicting a collision prediction point that is a potential collision point, the notification control means executes information notification control for notifying collision prediction information that is information about the collision prediction point estimated by the collision prediction estimation means To do.
When the own vehicle information acquisition unit acquires the route information of the own vehicle and the other vehicle information acquisition unit acquires the route information of the other vehicle, the collision prediction estimation unit and the other vehicle The intersection point with the planned route indicated by the route information is estimated as a collision prediction point.
Further, the notification control means executes as information notification control that the display marker is displayed at the predicted collision point on the map displayed on the display device. In the notification control means, the derivation means derives the probability that the host vehicle and the other vehicle will collide at the predicted collision point, and the higher the probability derived by the derivation means, the larger the size of the display marker for the predicted collision point. Increase

  That is, in the information providing apparatus of the present invention, when the route information is included in at least one of the information acquired by the own vehicle information acquiring unit or the information acquired by the other vehicle information acquiring unit, the route information indicates A predicted collision point is estimated based on the planned route. For this reason, unlike the conventional information providing apparatus, the possibility that the own vehicle or another vehicle travels in the predicted collision point is increased.

  Therefore, according to the information providing apparatus of the present invention, it is possible to notify only the collision prediction information about the collision prediction point where the own vehicle or another vehicle is likely to travel, and as a result, unnecessary collision prediction information. Is reduced. For this reason, according to the information providing apparatus of the present invention, it is possible to reduce the possibility that the user of the information providing apparatus feels uncomfortable by notifying unnecessary collision prediction information. Can be improved.

  The traveling state referred to here is an index for estimating a route that the own vehicle (or another vehicle, hereinafter referred to as a vehicle) is expected to move in the future, and the current position of the vehicle and the vehicle speed are In addition, it may include at least a travel history (that is, a locus of a position at a past predetermined time, that is, a movement route), acceleration, a traveling direction, and the like.

Further, the collision prediction means in the information providing apparatus of the present invention estimates a collision prediction point candidate that is a candidate for a collision prediction point based on the own vehicle traveling information and the other vehicle traveling information, and the collision predicted point candidate is scheduled. When located on the route, the predicted collision point candidate may be handled as the predicted collision point.

  Furthermore, the notification control means in the information providing apparatus of the present invention, as claimed in claim 2, wherein the passage determining means determines whether or not the own vehicle has passed the collision prediction point estimated by the collision prediction estimating means. And as a result of the determination, if the own vehicle passes the collision prediction point, the notification control canceling means may be configured to cancel the execution of the information notification control.

In the information providing apparatus of the present invention configured as described above, it is not necessary to notify the collision prediction information that is unnecessary when the host vehicle passes through the collision prediction point.
Therefore, according to the information providing apparatus of the present invention, it is possible to more reliably reduce an unnecessary collision prediction information is notified, Ru can driver to further reduce the likelihood of discomfort .

Embodiments of the present invention will be described below with reference to the drawings.
<Overall configuration>
First, FIG. 1 is a block diagram showing a schematic configuration of an information providing system to which the present invention is applied and provides information for reducing collision accidents between vehicles.

  The information providing system 1 includes a plurality of in-vehicle devices 10 that are mounted on a vehicle and configured to be able to communicate information with each other. In each in-vehicle device 10, the traveling state of the host vehicle, a route to a destination, and others Based on the traveling state of the vehicle and the route to the destination, a warning is issued about a position where the host vehicle and another vehicle may collide. In the following description, since the in-vehicle device 10 (including each component) mounted on the other vehicle is configured in the same manner as the in-vehicle device 10 mounted on the host vehicle, the reference symbol a is given (that is, other The description of the in-vehicle device 10a) mounted on the vehicle will be omitted.

  In order to realize this, the in-vehicle device 10 guides a route to a destination according to a vehicle speed sensor 12 that detects the vehicle speed of the host vehicle, a communication device 11 that communicates with another vehicle, and an external input. In addition to the well-known process, the navigation apparatus 20 is provided that issues a warning for the possibility of collision between the host vehicle and another vehicle.

The vehicle speed sensor 12 detects the vehicle speed of the host vehicle based on the rotational speed of the wheel, and is configured to output the detected vehicle speed to the navigation device 20.
The communication device 11 is for performing inter-vehicle communication, and is configured to perform wireless communication with the communication device 11a of the in-vehicle device 10a that is located in the vicinity of the host vehicle and is mounted on another vehicle. .
<About the navigation device>
Next, the navigation device 20 will be described.

  The navigation device 20 inputs a position detector 21 that detects the current position of the host vehicle, a map data storage unit 25 that stores map data and various data, a display device 26 that displays information, and various instructions from the user. Operation switch group 27, a voice output unit 28 for outputting various guide voices, a microphone (not shown) for outputting an electrical signal based on voice spoken by the user, a position detector 21, The display device 26 and the audio output unit 28 are controlled according to inputs from the map data storage unit 25, the operation switch group 27, the microphone, and the like, and the control unit 30 that controls the entire in-vehicle device 10 is provided.

  The position detector 21 receives a radio wave from an artificial satellite for GPS (Global Positioning System) via a GPS antenna (not shown) and outputs the received signal, and a rotational motion applied to the vehicle. A gyro sensor 23 for detecting the size and a geomagnetic sensor 24 for detecting a traveling direction from the geomagnetism are provided. Based on the output signals from these sensors 22 to 24, the control unit 30 calculates the current position of the vehicle, the direction of travel, and the like.

  The map data storage unit 25 is a storage device for storing data. Map data (node data, link data, cost data, road data, terrain data, mark data, intersection data, facility data, etc.), guidance data Voice data, voice recognition data, and the like are stored.

Furthermore, the display device 26 is a color display device, such as a liquid crystal display, an organic EL display, or a CRT, any of which may be used.
The operation switch group 27 includes a touch panel configured integrally with the display surface of the display device 26, key switches provided around the display device 26, and the like. Note that the touch panel and the display device 26 are laminated and integrated, and there are various types of touch panels such as a pressure-sensitive method, an electromagnetic induction method, a capacitance method, or a combination thereof. It may be used.

  The voice output unit 28 is a speaker that converts a signal from the control unit 30 into voice and outputs the voice. Specifically, the voice output unit 28 outputs facility guides and various guidance voices stored in the map data storage unit 25.

  Furthermore, the microphone outputs an electric signal (voice signal) based on the input voice to the control unit 30 when the user inputs (speaks) voice. The navigation device 20 can be operated by voice commands input via the microphone.

  On the other hand, the control unit 30 includes a ROM 31 that stores programs and the like, a RAM 32 that temporarily stores data, and a CPU 33 that executes various processes in accordance with the ROM 31 and the programs stored in the RAM 32.

  The ROM 31 displays a map near the current position and displays the current vehicle position mark in the current position display process, a route setting process for setting a route to the destination, and a route set by the route setting process. A processing program for executing route guidance processing for performing route guidance by display on the display device 26 and voice output from the voice output unit 28 is stored. At the same time, in the ROM 31, there is a possibility that the host vehicle and the other vehicle collide based on the traveling state of the own vehicle, the route to the destination, the traveling state of the other vehicle, and the route to the destination. A processing program for executing a collision prediction notification process for issuing a warning about the position is also stored.

  As shown in FIG. 2, the ROM 31 is referred to when the CPU 33 executes the collision prediction notification process, and the vehicle speed increases from 0 to a prescribed vehicle speed defined in advance as the vehicle speed increases, and the vehicle speed increases to the prescribed vehicle speed. In the above, various maps such as the prediction range determination map in which the vehicle speed and the weight are associated with each other so as to be the maximum value are stored.

That is, the control unit 30 is configured to be able to execute a collision prediction notification process in addition to executing a current position display process, a route setting process, a route guidance process, and the like.
<Collision prediction notification processing>
Next, the collision prediction notification process executed by the control unit 30 will be described.

Here, FIG. 3 is a flowchart for explaining the processing procedure of the collision prediction notification processing.
When this collision prediction notification process is started, first, in S110, the host vehicle information is acquired, and the acquired host vehicle information is output from the communication device 11 to the in-vehicle device 10a of the other vehicle. In the host vehicle information, in addition to the traveling state of the host vehicle, when a route to the destination (hereinafter referred to as a scheduled route) is set in the route setting process, the planned route is also included.

  Specifically, in the present embodiment, the traveling state is obtained from the vehicle speed detected by the vehicle speed sensor 12, the current position detected by the GPS receiver 22, the detection result of the gyro sensor 23, and the geomagnetic sensor 24. The travel direction and the history of the position where the vehicle has traveled (hereinafter referred to as travel history, that is, the route traveled in the past) are acquired.

  In S120, the traveling state of the other vehicle output from the in-vehicle device 10a of the other vehicle and received by the communication device 11, and the planned route (however, the route to the destination is set in the other vehicle by the route setting process). Is acquired as other vehicle information. That is, the other vehicle information is information output from the in-vehicle device 10a when S110 of this process is executed in the in-vehicle device 10a. In S120, other vehicle information is received from all other vehicles located within a range where the communication device 11 and the communication device 11a can communicate (for example, about 500 m).

  Then, in S130, a determination target vehicle that determines whether one other vehicle is a vehicle that may collide with the own vehicle among all the other vehicles that received the other vehicle information in S120. Extract as

  In continuing S140, it is determined whether the determination object vehicle extracted by S130 is located in the prescription | regulation range prescribed | regulated previously from the own vehicle. Specifically, in the present embodiment, the specified range is the range of the map displayed on the display device 26 in the current position display process. Therefore, if the map displayed on the display device 26 is reduced, the prescribed range becomes large (that is, it can be within the range even if the distance from the host vehicle is far), and if the map is enlarged, the prescribed range becomes small. .

As a result of the determination in S140, if the determination target vehicle is located within the specified range, the process proceeds to S150.
In S150, it is determined whether or not the planned route is included in at least one of the own vehicle information acquired in S110 or the other vehicle information acquired in S120 and extracted in S130. To do. As a result of the determination, when it is determined that at least one of the own vehicle information and the other vehicle information includes the planned route, the process proceeds to S160.

  In S160, a predicted route that is a route that the host vehicle and the determination target vehicle are expected to proceed in the future is derived. Specifically, in the present embodiment, when a planned route is set for both the host vehicle and other vehicles, the planned route is set as the predicted route. In addition, when a planned route is set only for one of the own vehicle or another vehicle, for the vehicle for which the planned route is set, the planned route is the predicted route, and the planned route is not set. For, it is assumed that the route indicated in the travel history will continue to be taken in the future (for example, if the past route is straight, the future route is also straight), and the predicted route is derived.

  On the other hand, as a result of the determination in S150, if it is determined that both the own vehicle information and the other vehicle information do not include the planned route, both the own vehicle and the determination target vehicle are included in the travel history in S170. It is estimated that the indicated route will continue to be taken in the future, a predicted route is derived, and the process proceeds to S180.

That is, in S160 and S170, after deriving each predicted route for both the host vehicle and the determination target vehicle, the process proceeds to S180.
In S180, it is determined whether or not there is a route intersection where the predicted route of the host vehicle derived in the previous S160 (or S170) and the predicted route of the other vehicle intersect. As a result of the determination, if the route intersection does not exist, the process proceeds to S230, and if the route intersection exists, the process proceeds to S190.

  In S190, the arrival time required for the host vehicle to reach the route intersection is calculated based on the vehicle speed acquired in S110, and the predicted route of the host vehicle previously derived is traveled for the arrival time. Later, an expected range where the host vehicle is expected to be located is estimated. Further, in S190, when the predicted route of the determination target vehicle derived previously is traveled at the vehicle speed of the determination target vehicle acquired in S120, an expected range in which the determination target vehicle is expected to reach after the arrival time is estimated. .

  Specifically, in the present embodiment, the predicted range of the host vehicle is drawn around the route intersection, and then the predicted range of the determination target vehicle is drawn. However, the predicted range in the present embodiment is a value obtained by reading the weight corresponding to each vehicle speed from the predicted range determination map stored in the ROM 31 and multiplying the weight by the total length of the vehicle for both the own vehicle and the other vehicles. It is a circle.

In other words, in S190, an expected range in which each vehicle will travel after the arrival time is obtained for both the own vehicle and the determination target vehicle.
Subsequently, in S200, it is determined whether or not the predicted range of the host vehicle obtained in S190 and the predicted range of the determination target vehicle overlap. And as a result of determination, when it is determined that the mutual prediction ranges overlap, the process proceeds to S210.

  In S210, the degree of overlap between the predicted range of the host vehicle and the predicted range of the determination target vehicle is obtained, and as the degree increases, the host vehicle and the determination target vehicle collide at the route intersection determined in S180. Notification is made as a point having a high possibility (ie, collision probability) (hereinafter referred to as a collision prediction point).

  Specifically, in the present embodiment, the video signal is displayed on the display device 26 so that the determination target vehicle (another vehicle) that travels at the predicted collision point is displayed in a color different from that of the other vehicle that does not travel at the predicted collision point. Output. In addition to this, a display marker indicating that the own vehicle may collide with another vehicle has a color different from that of other intersections other than the predicted collision point, and is determined to be the own vehicle. The video signal is output to the display device 26 so as to be displayed as a larger one as the probability of collision with the target vehicle increases. Further, for example, an audio signal is output to the audio output unit 28 so that a warning message such as “There is a danger of collision with another vehicle 100 meters (distance to the predicted collision point) ahead” is output.

  Further, in S220, the determination target vehicle extracted in S130 and subjected to the steps from S140 to S210 is set as a notification target indicating that it is a notification target. Specifically, a notification target flag indicating that it is a notification target is set. Thereby, the collision prediction point between the determination target vehicle and the host vehicle is repeatedly notified (that is, the display marker 26 continues to be displayed on the display device 26, and the audio output unit 28 outputs the audio at a predetermined interval. Is output).

  As a result of the determination in S140, if the determination target vehicle is located outside the specified range, or if it is determined in S180 that there is no route intersection, the process proceeds to S230. . Further, as a result of the determination in S200, if the predicted range of the own vehicle and the predicted range of the determination target vehicle do not overlap, the process proceeds to S230.

  In other words, if the vehicle to be judged is traveling away from the host vehicle, or if the course of the host vehicle and the vehicle to be judged are in completely different directions, the host vehicle or the subject vehicle has passed the collision prediction point. If so, the process proceeds to S230.

In S230, the determination target vehicle is excluded from the notification target, and the process proceeds to S240. That is, if the notification target flag is set in the determination target vehicle, the notification target flag is canceled.
As a result, for example, when it is determined that the vehicle to be determined is out of the specified range or the collision prediction point does not exist and the process proceeds to S230, the notification is not made from the beginning and the own vehicle collides. When the process proceeds to S230 by passing through the predicted point, the notification about the predicted collision point is canceled. However, only the position of the other vehicle is displayed.

  In S240, it is determined whether or not the processing from S130 to S230 has been executed for all other vehicles that have received the other vehicle information in S120, and if there is another vehicle that has not finished processing as a result of the determination. Returning to S130, the next vehicle to be judged is extracted.

On the other hand, if the result of determination is that processing has been completed for all other vehicles, the process returns to S110.
That is, in the collision prediction notification process, when a planned route is set for at least one of the host vehicle and the other vehicle, a collision predicted point is derived based on the planned route. For this reason, the collision prediction point notified in the collision prediction notification process is a point where the host vehicle or another vehicle is likely to pass.
<Operation example of in-vehicle device 10>
Next, an operation example of the in-vehicle device 10 will be described.

Here, FIG. 4 is a schematic diagram showing the positional relationship between the host vehicle and the other vehicle, and FIG. 5 explains the notification contents when the host vehicle and the other vehicle have the positional relationship shown in FIG. It is explanatory drawing for doing.
First, as shown in FIG. 4, a planned route is set in the own vehicle so as to make a left turn at an intersection, and there are three other vehicles in which the planned route is set within a communication range of the communication device 11. There are vehicles (other vehicles A, B, and C in the figure).

  Under this situation, when the control unit 30 executes the previous collision prediction notification process, the host vehicle information including the planned route set for the host vehicle is acquired and the other vehicle information including the planned route from the three other vehicles. To get.

  However, under the situation shown in FIG. 4, the planned route of the other vehicle that intersects the planned route of the own vehicle is only the planned route set by the other vehicle A. Only a point where the planned route of the vehicle A intersects becomes a route intersection. Further, the predicted range of the host vehicle and the predicted range of the other vehicle A are drawn around the route intersection, and these predicted ranges overlap, so that the host vehicle and the other vehicle A It is assumed that there is a possibility of collision. Moreover, the probability that the own vehicle and the other vehicle A collide is obtained according to the overlapping degree of the expected range.

  In such a situation, the display device 26 displays the position of the host vehicle, the planned route of the host vehicle, the destination, and other roads in the same manner as a normal navigation device. As shown in FIG. 5, the display marker is displayed at the predicted collision point, and the other vehicle A is displayed in a different color so that it can be distinguished from the other vehicles B and C.

  On the other hand, the planned route set in the other vehicles B and C does not intersect with the planned route of the host vehicle, and therefore does not become a route intersection, and the display device 26 displays the other vehicle B as shown in FIG. , C only is displayed.

  However, the display marker becomes larger as the probability that the own vehicle and the other vehicle A collide with each other. For example, when the own vehicle or the other vehicle A passes the predicted collision point, the display marker is displayed. Is released.

Note that S110 of the collision prediction notification process of the present embodiment is the vehicle information acquisition unit of the present invention, S120 of the collision prediction notification process of the present invention is the other vehicle information acquisition unit of the present invention, S130 to S200 of the collision prediction notification process of the present invention. Up to now, S210 and S230 of the collision prediction notification processing correspond to the notification control means in the collision prediction estimation means of the present invention.
[Effect of the embodiment]
As described above, according to the information providing system 1 of the present embodiment, when a planned route is set on at least one of the host vehicle and the determination target vehicle, the predicted collision point is always located on the planned route. Will do. In particular, when a planned route is set for both the host vehicle and the other vehicle, only the intersection of the planned routes is a predicted collision point, so that the host vehicle and the other vehicle can travel the predicted collision point. The property becomes extremely high.

  Therefore, according to the information providing system 1 of the present embodiment, both the own vehicle and the other vehicles have their own vehicle as compared to the case where the predicted collision point is derived only from the running state (that is, the running history, current position, vehicle speed). It is possible to report information about a point where there is a high possibility that the vehicle and another vehicle will collide, that is, information useful to the user of the information providing system 1. As a result, according to the information providing system 1, information unnecessary for the user of the information providing system 1 (that is, information on a point where the possibility of collision between the host vehicle and another vehicle is low) is notified. Can be reduced.

  Moreover, in the collision prediction notification process in the information providing system 1, the determination target vehicle located outside the specified range is excluded from the notification target, and even if the determination target vehicle is positioned within the specified range, it is determined as the predicted route of the own vehicle. When the predicted route of the target vehicle does not intersect, the determination target vehicle is excluded from the notification target.

  In other words, according to the information providing system 1, the determination target vehicle having a low possibility of colliding with the host vehicle is excluded from the notification target, thereby reducing processing in the current cycle and information displayed on the display device 26 ( Screen) can be made easier to see.

  Furthermore, even when the predicted route of the own vehicle and the predicted route of the determination target vehicle intersect, if the predicted range of the own vehicle and the predicted range of the determination target vehicle do not overlap, for example, the own vehicle or the determination target vehicle When passing through the predicted collision point, the notification about the predicted collision point is canceled.

  For this reason, according to the information provision system 1, it becomes unnecessary to alert | report the information which became unnecessary by passing a collision prediction point, and it can make information (screen) displayed on the display apparatus 26 easier to see. .

  As described above, according to the information providing system 1 of the present embodiment, unlike the conventional information providing apparatus, it is possible that the user feels uncomfortable by reducing the notification of unnecessary information. Can be reduced. At the same time, according to the information providing system 1, it is possible to improve the convenience by making the information displayed on the display device 26 easier to see.

  In addition, according to the information providing system 1 of the present embodiment, the determination target vehicle that travels at the predicted collision point and the other vehicle that does not travel at the predicted collision point are displayed in different colors. It is possible to make the user easily recognize the position where the vehicle to be determined (that is, the vehicle that is highly likely to collide) is traveling.

  Furthermore, according to the information providing system 1 of the present embodiment, since the display marker indicating the predicted collision point is displayed in a color different from that of other intersections, the user can easily recognize the predicted collision point. Can do. Further, according to the information providing system 1, since the display marker is displayed as being larger as the probability that the own vehicle and the determination target vehicle collide is higher, a predicted collision point (that is, a collision) that the user should be careful of. It is possible to make the user easily recognize a point that is highly likely to be performed).

By the way, according to the information provision system 1 of this embodiment, since the warning message about a collision prediction point is output from the audio | voice output part 28, the user of the said information provision system 1 is made to recognize a collision prediction point more reliably. Can do.
[Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it is possible to implement in various aspects.

  For example, in the collision prediction notification process in the above embodiment, when the planned route is not set for both the host vehicle and the determination target vehicle, the route intersection (ie However, if no planned route is set for both the host vehicle and the determination target vehicle, the collision prediction point may not be derived. That is, as a result of the determination in S150 of the collision prediction notification process, if it is determined that neither the own vehicle nor the determination target vehicle is set, the process may proceed to S230.

  In such a collision prediction notification process, since only the predicted collision point based on the planned route is derived, the possibility that the host vehicle or another vehicle travels on the predicted collision point increases. For this reason, it can alert | report only about the point with high possibility that the own vehicle and another vehicle collide, As a result, unnecessary alerting | reporting can be reduced.

  Furthermore, in the collision notification process in the above embodiment, if a planned route is set in at least one of the own vehicle or the determination target vehicle, the route intersection is derived based on the planned route. If the intersection of the predicted route derived from the travel history of the other vehicle is located on the planned route set in at least one of the own vehicle or the determination target vehicle, the intersection is set as the route intersection. Also good.

  In addition, although the display marker displayed on the display device 26 in the collision prediction notification process in the above embodiment is larger as the probability that the own vehicle and the determination target vehicle collide is higher, the brightness is higher as the probability of collision is higher. May be high. Further, the display marker may change both the size and the color, or may blink.

As a result, the predicted collision point can be clearly distinguished from other intersections and the like, and the user can recognize that it is the predicted collision point at first glance.
In the communication device 11 in the above embodiment, information is communicated with other vehicles by inter-vehicle communication. However, the communication method is not limited to inter-vehicle communication, and road-to-vehicle communication or a repeater is used. Information may be communicated with other vehicles.

  Furthermore, although the display device 26 in the above embodiment uses a color display device, it may be a monochrome display device. A head-up display may be used as the display device 26.

It is a block diagram which shows schematic structure of an information provision system. It is explanatory drawing which shows the prediction range determination map for determining a prediction range. It is the flowchart which showed the process sequence of the collision prediction alerting | reporting process. It is the schematic diagram which showed the positional relationship of the own vehicle and another vehicle. It is explanatory drawing for demonstrating the alerting | reporting content displayed on a display. It is explanatory drawing for demonstrating the subject of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Information provision system 10 ... In-vehicle apparatus 11 ... Communication apparatus 12 ... Vehicle speed sensor 20 ... Navigation apparatus 21 ... Position detector 22 ... GPS receiver 23 ... Gyro sensor 24 ... Geomagnetic sensor 25 ... Map data storage part 26 ... Display apparatus 27 ... operation switch group 28 ... sound output unit 30 ... control unit

Claims (2)

In addition to the own vehicle traveling information related to the traveling state of the own vehicle, when the planned route of the own vehicle to the destination is set, own vehicle information acquisition means for acquiring route information indicating the planned route;
In addition to other vehicle traveling information related to the traveling state of the other vehicle, when the planned route of the other vehicle to the destination is set, other vehicle information acquisition means for acquiring route information indicating the planned route;
The host vehicle and the other vehicle may collide based on the host vehicle traveling information acquired by the host vehicle information acquiring unit, the other vehicle traveling information acquired by the other vehicle information acquiring unit, and the route information. A collision prediction estimation means for estimating a collision prediction point that is a characteristic point;
Notification control means for executing information notification control for notifying collision prediction information, which is information about a collision prediction point estimated by the collision prediction estimation means,
The collision prediction estimation means includes
When the route information of the own vehicle is acquired by the own vehicle information acquisition unit and the route information of the other vehicle is acquired by the other vehicle information acquisition unit, the planned route indicated by the route information of the own vehicle and the route of the other vehicle Estimate the intersection with the planned route indicated by the information as the collision prediction point ,
The notification control means includes
Displaying a display marker for the predicted collision point on the map displayed on the display device is executed as the information notification control,
With respect to the predicted collision point, derivation means for deriving the probability that the host vehicle and the other vehicle will collide,
The information providing apparatus characterized by increasing the size of the display marker with respect to the predicted collision point as the probability derived by the deriving unit increases . The host vehicle travel information includes a current position of the host vehicle,
The notification control means includes
Based on the own vehicle travel information acquired by the own vehicle information acquisition means, passage determination means for determining whether or not the own vehicle has passed the collision prediction point estimated by the collision prediction estimation means;
The information providing apparatus according to claim 1, further comprising: a notification release unit that cancels the execution of the information notification control when the passage determination unit determines that the host vehicle has passed the collision prediction point.

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