JP2018139033A - Danger level determination device, information providing device, danger level determination method, information providing method and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a danger level determination device capable of appropriately classifying levels of dangerous points to prevent traffic accidents.SOLUTION: A danger level determination device includes: a danger factor acquisition part for acquiring vehicle dynamic information indicating an event that occurred in a vehicle related to driving of the vehicle and point-static information related to an event occurrence point; and a danger level determination part for determining a danger level indicating a possibility of occurence of a traffic accident at the event occurrence point based on the vehicle dynamic information and point-static information acquired by the danger factor acquisition part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a danger level determination device, a danger level determination method, and a computer program for determining a danger level indicating the possibility of occurrence of a traffic accident. The present invention also relates to an information providing apparatus, an information providing method, and a computer program that provide accident prevention information for preventing traffic accidents based on a danger level.

  Conventionally, an alarm control device mounted on a vehicle has been proposed. This alarm control device receives dangerous point information collected from a plurality of vehicles by a traffic information center, etc. from the traffic information center, etc., and a vehicle equipped with the alarm control device around the dangerous point indicated by the dangerous point information. When traveling, an alarm message is output (for example, refer to Patent Document 1).

  According to such an alarm control device, a warning for preventing accidents can be given in advance to the driver of the vehicle by outputting an alarm message having a high accident prevention effect.

JP 2010-97345 A

  According to the conventional alarm control device, the danger point information indicates the type of road structure, and the alarm message is changed based on the type of road structure. However, no consideration is given to changing the timing of warning or the like according to the type of road structure. For this reason, the driver is warned at the same timing at points where accidents frequently occur and points where accidents are unlikely to occur. As described above, according to the conventional alarm control device, since the level of the dangerous spot is not performed, the timing for performing the alarm is uniformly determined.

  The present invention has been made in view of the above circumstances, and provides a danger level determination device, a danger level determination method, and a computer program capable of appropriately classifying dangerous points to prevent traffic accidents. The purpose is to do.

  Moreover, it aims at providing the information provision apparatus which can provide accident prevention information at an appropriate timing, information provision, and a computer program.

  (1) In order to achieve the above object, a danger level determination device according to an embodiment of the present invention includes vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle, and static information relating to the occurrence position of the event. Factor acquisition unit that acquires point static information that is typical information, and the occurrence of a traffic accident at the occurrence location based on the vehicle dynamic information and the point static information acquired by the risk factor acquisition unit A risk level determination unit that determines a risk level indicating the possibility of

  (7) An information providing apparatus according to another embodiment of the present invention is an information providing apparatus that is mounted on a host vehicle and provides accident prevention information for preventing a traffic accident to a driver of the host vehicle. A danger point information acquisition unit that acquires information on the danger point and information on the danger level at the danger point from a danger level determination device, and the accident when the accident prevention information is provided to the driver A change determining unit that determines whether or not the provision start time of prevention information has been changed based on the information on the dangerous point acquired by the dangerous point information acquiring unit and the information on the risk level.

  (8) The danger level determination method according to another embodiment of the present invention includes vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle, and static point information that is static information relating to the occurrence position of the event. And a step of determining a danger level indicating a possibility of occurrence of a traffic accident at the occurrence position based on the acquired vehicle dynamic information and the point static information.

  (9) An information providing method according to another embodiment of the present invention is provided by an information providing apparatus that is mounted on a host vehicle and provides accident prevention information for preventing a traffic accident to a driver of the host vehicle. A method for obtaining information on the dangerous point and information on the dangerous level at the dangerous point from a dangerous level determining device, and the accident when providing the accident prevention information to the driver Determining whether or not the provision start time of the prevention information is changed based on the acquired information on the dangerous point and the information on the danger level.

  (10) A computer program according to another embodiment of the present invention is a computer program that allows a computer to perform vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle and static information relating to the occurrence position of the event. A risk factor acquisition unit for acquiring static information, and a risk indicating a possibility of occurrence of a traffic accident at the occurrence position based on the vehicle dynamic information and the point static information acquired by the risk factor acquisition unit It functions as a danger level determination unit that determines the level.

  (11) A computer program according to another embodiment of the present invention is an information providing apparatus that is equipped with a computer in the host vehicle and provides accident prevention information for preventing a traffic accident to the driver of the host vehicle. A computer program for causing a computer to function, a risk point information acquisition unit that acquires information on the risk point and information on the risk level at the risk point from the risk level determination device according to claim 6. And whether or not the accident prevention information provision start time is changed when the accident prevention information is provided to the driver, the risk point information acquired by the risk point information acquisition unit and the risk level It is made to function as a change determination part determined based on information.

  The present invention can also be realized as a semiconductor integrated circuit that realizes part or all of the danger level determination device, or as a system including an information providing device.

According to the present invention, it is possible to appropriately classify dangerous points in order to prevent traffic accidents.
In addition, accident prevention information can be provided at an appropriate timing.

It is a block diagram which shows the structure of the safe driving assistance apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the server which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the total table which a danger level determination part produces. It is a sequence diagram which shows the safe driving assistance apparatus which concerns on Embodiment 1 of this invention, and the process sequence of a server. It is a figure for demonstrating the safe driving assistance apparatus and server processing procedure which concern on Embodiment 1 of this invention. It is a sequence diagram which shows the other process sequence of the safe driving assistance apparatus and server which concern on Embodiment 1 of this invention. It is a figure for demonstrating the safe driving assistance apparatus and server processing procedure which concern on Embodiment 1 of this invention. It is a block diagram which shows the structure of the safe driving assistance apparatus which concerns on Embodiment 2 of this invention. It is a flowchart which shows the process sequence of the safe driving assistance apparatus which concerns on Embodiment 2 of this invention.

[Outline of Embodiment of the Present Invention]
First, the outline of the embodiment of the present invention will be listed and described.
(1) A danger level determination device according to an embodiment of the present invention includes vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in a vehicle, and point static that is static information relating to the occurrence position of the event. A risk factor acquisition unit for acquiring information, and a risk level indicating a possibility of occurrence of a traffic accident at the occurrence position based on the vehicle dynamic information and the point static information acquired by the risk factor acquisition unit. And a risk level determination unit for determining.

  According to this configuration, it is possible to determine the danger level at the occurrence position of the event occurring in the vehicle based on the vehicle dynamic information and the point static information. The vehicle dynamic information indicates, for example, an event such as a sudden braking operation or a collision prevention alarm. The point static information indicates, for example, a point shape such as an intersection. For this reason, when the event occurs at an intersection having a complicated shape, the danger level can be determined higher than when the event occurs at an intersection having a simple shape. Thereby, danger point level classification can be performed appropriately.

  (2) Preferably, the risk factor acquisition unit further acquires point dynamic information that is dynamic information regarding the occurrence position of the event, and the risk level determination unit acquires the risk factor acquisition unit. Based on the vehicle dynamic information, the point static information, and the point dynamic information, the danger level at the occurrence position is determined.

  According to this configuration, it is possible to further determine the danger level at the event occurrence position in consideration of the point dynamic information. The point dynamic information indicates, for example, the environment of the point that dynamically changes, such as whether or not there is a parked vehicle and whether or not construction is underway. Thereby, even if the environment of a spot changes, the level classification of a dangerous spot can be performed appropriately.

  (3) More preferably, the danger level determination unit may perform another operation on at least one of the vehicle dynamic information, the point static information, and the point dynamic information acquired by the risk factor acquisition unit. The risk level is determined based on the weighted vehicle dynamic information, the point static information, and the point dynamic information.

  According to this configuration, the danger level at the event occurrence position can be determined based on the weighted vehicle dynamic information, point static information, and point dynamic information. For this reason, the danger level can be appropriately determined by adjusting the weight.

  (4) More preferably, the said danger level determination part weights larger than the said vehicle dynamic information and the said point static information with respect to the said point dynamic information.

  According to this configuration, it is possible to determine the danger level at the occurrence position of the event after performing greater weighting on the point dynamic information. If the point dynamic information changes, it can be considered that the driving of the vehicle is affected. For this reason, a danger level can be determined more appropriately by giving large weighting to point dynamic information.

  (5) The danger level determination device further includes a danger point information acquisition unit that acquires danger point information indicating a position of a danger point where a traffic accident is likely to occur, and the vehicle passing through the danger point. In the case of providing accident prevention information for preventing a traffic accident to the driver of the vehicle sometimes, whether or not the provision start time of the accident prevention information is changed is determined by the risk level determination unit of the occurrence position And a change determining unit that determines based on the danger level.

  According to this configuration, when providing accident prevention information for preventing traffic accidents when a vehicle passes through a danger point, whether or not to change the provision start time of the accident prevention information is determined based on the danger level. The Thereby, for example, the provision start time of the accident prevention information when the vehicle passes through the danger point can be changed according to the danger level. For example, when a vehicle passes through a danger point with a high danger level, accident prevention information can be provided to the driver at an earlier timing than when the vehicle passes a danger point with a low danger level. As described above, the accident prevention information is provided to the driver at a timing corresponding to the danger level, so that the accident prevention information can be provided to the driver at an appropriate timing. For this reason, a traffic accident can be prevented beforehand.

  (6) Moreover, the said danger level determination apparatus is further the danger point determination part which determines the danger point with high possibility that a traffic accident will occur based on the said vehicle dynamic information which the said risk factor acquisition part acquired. And a notification unit for notifying the vehicle of the information on the dangerous point determined by the dangerous point determination unit and the information on the dangerous level at the dangerous point determined by the risk level determination unit.

  According to this configuration, it is possible to notify the vehicle of danger level information together with danger point information. For this reason, when the vehicle provides accident prevention information for preventing traffic accidents when passing through a dangerous point, the vehicle determines whether or not to change the provision start time of the accident prevention information based on the danger level. Can do. Thereby, for example, the vehicle can change the provision start time of the accident prevention information when passing the danger point according to the danger level. For example, when a vehicle passes through a danger point with a high danger level, accident prevention information can be provided to the driver at an earlier timing than when the vehicle passes a danger point with a low danger level. Thus, accident prevention information is provided to the driver at a timing according to the danger level. For this reason, accident prevention information can be provided to the vehicle at an appropriate timing. Thereby, a traffic accident can be prevented beforehand.

  (7) An information providing apparatus according to another embodiment of the present invention is an information providing apparatus that is mounted on a host vehicle and provides accident prevention information for preventing a traffic accident to a driver of the host vehicle. A danger point information acquisition unit for acquiring information on the danger point and information on the danger level at the danger point from the danger level determination device according to (6), and the accident prevention information for the driver. A change determination unit that determines whether or not the provision start time of the accident prevention information is changed based on the information on the dangerous point acquired by the dangerous point information acquisition unit and the information on the danger level. .

  According to this configuration, the information on accident prevention information for preventing traffic accidents is based on the information on the dangerous point indicating the location of the dangerous point where a traffic accident is likely to occur and the information on the danger level at the dangerous point. Whether to change the provision start time is determined. Thereby, for example, the provision start time of the accident prevention information when the host vehicle passes through the danger point can be changed to a time earlier than the provision start time set in advance. In other words, when the host vehicle passes through the dangerous point, accident prevention information can be provided to the driver at an earlier timing than when passing through other points. Also, how much the timing is advanced can be changed based on the danger level. Thus, since accident prevention information is provided to the driver at an early stage according to the danger level at the danger point, the accident prevention information can be provided to the driver at an appropriate timing. For this reason, a traffic accident can be prevented beforehand.

  (8) A danger level determination method according to another embodiment of the present invention includes vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle, and static point information that is static information relating to the occurrence position of the event. And a step of determining a danger level indicating a possibility of occurrence of a traffic accident at the occurrence position based on the acquired vehicle dynamic information and the point static information.

  This risk level determination method includes steps corresponding to the processing unit provided in the above-described risk level determination device. For this reason, there can exist an effect | action and effect similar to the danger level determination apparatus mentioned above.

  (9) An information providing method according to another embodiment of the present invention is provided by an information providing apparatus that is mounted on an own vehicle and provides accident prevention information for preventing a traffic accident to a driver of the own vehicle. A method for obtaining information on the dangerous point and information on the dangerous level at the dangerous point from the dangerous level determining device according to (6), and the accident prevention information for the driver. Determining whether or not to change the provision start time of the accident prevention information when providing the accident prevention information based on the acquired information on the dangerous point and the information on the danger level.

  This information providing method includes steps corresponding to the processing unit provided in the information providing apparatus described above. For this reason, there can exist an effect | action and effect similar to the information provision apparatus mentioned above.

  (10) In a computer program according to another embodiment of the present invention, a computer is a vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle, and a point that is static information relating to the occurrence position of the event. A risk factor acquisition unit for acquiring static information, and a risk indicating a possibility of occurrence of a traffic accident at the occurrence position based on the vehicle dynamic information and the point static information acquired by the risk factor acquisition unit It functions as a danger level determination unit that determines the level.

  According to this computer program, the computer can function as a processing unit provided in the above-described danger level determination device. For this reason, there can exist an effect | action and effect similar to the danger level determination apparatus mentioned above.

  (11) A computer program according to another embodiment of the present invention is an information providing apparatus that is equipped with a computer in an own vehicle and provides accident prevention information for preventing a traffic accident to a driver of the own vehicle. A computer program for causing a function to be obtained, wherein the computer acquires danger point information and the danger level information at the danger point from the danger level determination device according to (6) above. Information on the dangerous point acquired by the dangerous point information acquisition unit and the danger level, whether or not the provision start time of the accident prevention information is changed when providing the accident prevention information to the driver. It is made to function as a change determination part determined based on the information.

  According to this computer program, it is possible to cause the computer to function as a processing unit included in the information providing apparatus described above. For this reason, there can exist an effect | action and effect similar to the information provision apparatus mentioned above.

[Details of the embodiment of the present invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. The numerical values, the constituent elements, the arrangement positions and connection forms of the constituent elements, the steps, the order of the steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. The invention is specified by the claims. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept of the present invention are not necessarily required to achieve the object of the present invention. It will be described as constituting a preferred form.

  Moreover, the same code | symbol is attached | subjected to the same component. Since their functions and names are also the same, their description will be omitted as appropriate.

(Embodiment 1)
[Configuration of safe driving support system]
FIG. 1 is a block diagram showing a configuration of a safe driving support apparatus according to Embodiment 1 of the present invention.

  The safe driving support device 1 is mounted on a vehicle and has a function as an information providing device that provides accident prevention information for preventing a traffic accident to a driver of the vehicle.

  The safe driving support device 1 includes a wireless communication unit 10, a positioning unit 20, a control unit 30, a camera 38, a storage device 45, a display unit 50, and a sound output unit 60.

  The wireless communication unit 10 includes a communication interface that performs wireless communication with a server installed in a traffic control center or the like via a mobile phone communication network such as 3G or LTE (Long Term Evolution).

  The wireless communication unit 10 includes a communication interface for communicating with an in-vehicle communication device mounted on another vehicle or a roadside communication device which is an example of an infrastructure device installed on the roadside by ITS (Intelligent Transport Systems) wirelessly. . The communication method with the roadside communication device is not limited to ITS radio, but ETC (Electronic Toll Collection system) 2.0 (ETC and ETC2.0 are registered trademarks), an optical beacon, or the like may be used.

  The positioning unit 20 measures the position of the vehicle on which the safe driving support device 1 is mounted. The positioning unit 20 includes a GPS (Global Positioning System) receiver 21 and an acceleration sensor 22.

The GPS receiver 21 receives radio waves from GPS satellites and measures the position of the vehicle based on the received radio waves. The satellites used for satellite positioning are not limited to GPS satellites, and other satellites such as quasi-zenith satellites may be used. The position of the vehicle is indicated by latitude and longitude.
The acceleration sensor 22 measures the acceleration of the vehicle and outputs the measured acceleration.

  The positioning unit 20 outputs the position of the vehicle measured by the GPS receiver 21, but when the vehicle travels in a place where radio waves from GPS satellites such as valleys of buildings and tunnels are difficult to reach, the GPS receiver 21 The position of the measured vehicle is corrected using the vehicle acceleration output by the acceleration sensor 22.

  The control unit 30 is configured by a CPU (Central Processing Unit) or the like, and as a functional component realized by executing a computer program on the control unit 30, a dangerous event detection unit 31 and an occurrence position detection unit 32. An image acquisition unit 33, an information transmission unit 34, a dangerous spot information acquisition unit 35, a change determination unit 36, and an accident prevention information provision unit 37.

  The dangerous event detection unit 31 detects a dangerous event that is an event related to a danger that has occurred in the vehicle.

  For example, when a collision prevention alarm using vehicle-to-vehicle communication is issued, the dangerous event detection unit 31 detects the occurrence of the alarm as a dangerous event. The dangerous event detection unit 31 stores information on the detected dangerous event in the storage device 45.

  Specifically, the wireless communication unit 10 receives position information from another vehicle. The positioning unit 20 measures the position information of the host vehicle. The control unit 30 will be described later when both the vehicles are closer than a predetermined distance based on the position information of the other vehicle received by the wireless communication unit 10 and the position information of the own vehicle measured by the positioning unit 20. A collision prevention alarm is issued by displaying a warning message on the display unit 50 or outputting an alarm sound from the sound output unit 60 described later. When a collision prevention alarm is issued, the dangerous event detector 31 detects the occurrence of the alarm as a dangerous event.

  Moreover, the dangerous event detection part 31 may detect the said event as a dangerous event, when the airbag installed in the vehicle act | operates or when a driver | operator applies a quick brake. The dangerous event detection unit 31 may acquire airbag operation information and brake operation information from various ECUs (Electronic Control Units).

  Further, when a collision prevention alarm using an autonomous sensor such as a millimeter wave sensor provided in the vehicle is issued, the dangerous event detection unit 31 may detect the occurrence of the alarm as a dangerous event. For example, the control unit 30 measures the inter-vehicle distance with a vehicle traveling ahead using a millimeter wave sensor, and displays a warning message on the display unit 50 when the inter-vehicle distance is less than a predetermined distance, A collision prevention alarm is issued by outputting an alarm sound from the sound output unit 60 or the like. When a collision prevention alarm is issued, the dangerous event detection unit 31 detects the occurrence of the alarm as a dangerous event.

  The occurrence position detector 32 detects the occurrence position of the dangerous event detected by the dangerous event detector 31. The generation position detection unit 32 stores information on the detected generation position in the storage device 45.

  That is, the occurrence position detection unit 32 acquires, from the positioning unit 20, the position of the vehicle measured by the positioning unit 20 at the timing when the dangerous event detection unit 31 detects the dangerous event. The occurrence position detection unit 32 detects the position of the vehicle acquired from the positioning unit 20 as the occurrence position of the dangerous event.

  The image acquisition unit 33 acquires an image captured by the camera 38 from a camera 38 that is mounted on the vehicle and images the surrounding environment.

  The information transmission unit 34 wirelessly communicates the information on the dangerous event detected by the dangerous event detection unit 31, the information on the occurrence position of the dangerous event detected by the occurrence position detection unit 32, and the image acquired by the image acquisition unit 33. The data is transmitted to the server via the unit 10.

  The dangerous point information acquisition unit 35 acquires dangerous point information indicating the position of the dangerous point and dangerous level information indicating the level of danger at the dangerous point from the server via the wireless communication unit 10.

  In the dangerous point information, for example, the dangerous point position may be indicated by latitude and longitude, or the dangerous point position may be indicated by a link of map information or a link node position.

  The danger level information includes, for example, “danger” and “very dangerous” as the danger level at the danger point. The danger level “danger” indicates that a traffic accident is likely to occur. The danger level “very dangerous” indicates that a traffic accident is very likely. That is, the danger level “very dangerous” is more likely to cause a traffic accident than the danger level “danger”.

  The accident prevention information providing unit 37 provides a display unit 50 or a sound output unit to the vehicle driver in order to prevent the vehicle from causing a contact accident with other vehicles, pedestrians or roadside installations. Providing accident prevention information through 60.

  The accident prevention information providing unit 37 provides accident prevention information corresponding to the support level to the driver of the vehicle.

  The support level consists of three stages: providing information, alerting and warning, and is determined by the time to collision (TTC), which is the remaining time from the current time to the time when a collision with another vehicle is expected. .

  For example, when the collision prediction time is 4 seconds or more and less than 5 seconds, the support level is “information provision”, and when the collision prediction time is 2 seconds or more and less than 4 seconds, the support level is “warning”. When the predicted collision time is less than 2 seconds, the support level is set to “alarm”.

  In the support level “information provision”, the accident prevention information providing unit 37 provides accident prevention information indicating an objective fact for the driver to perform safe driving by an image or sound. For example, the accident prevention information providing unit 37 notifies the driver of the fact that the vehicle is approaching from an intersecting lane as an accident prevention information with an image or sound.

  In addition, at the support level “warning”, the accident prevention information providing unit 37 provides accident prevention information indicating an item to be noticed by the driver with an image or sound. For example, the accident prevention information providing unit 37 notifies the driver of an image or sound as an accident prevention information with respect to a notice that the vehicle should be careful when traveling from an intersecting lane. Notice.

  Further, at the support level “alarm”, the accident prevention information providing unit 37 provides the accident prevention information indicating specific actions that the driver should take for avoiding the danger by an image or sound. For example, the accident prevention information providing unit 37 notifies the driver of accident prevention information indicating a specific action of stepping on the brake by an image or sound in order to avoid a collision with a vehicle traveling in an intersecting lane.

  Note that the predicted collision time is the speed information of the host vehicle, the heading information of the host vehicle, the position information of the host vehicle acquired from the positioning unit 20, the vehicle-to-vehicle communication via the wireless communication unit 10, or the road-to-vehicle communication. Based on the speed information, the direction information, the position information, etc. of the other vehicle acquired from the roadside communication device, the control unit 30 calculates. The method for calculating the collision prediction time is a known technique and is not the main point of the present application, and thus detailed description thereof is omitted.

  When the change determination unit 36 provides accident prevention information when the vehicle on which the safe driving support device 1 is mounted passes through the danger point based on the danger point information and the danger level information acquired by the danger point information acquisition unit 35. Whether to change the provision start time of accident prevention information.

  That is, when the change determination unit 36 determines that the vehicle is not traveling around the dangerous point (for example, within a predetermined distance from the dangerous point) based on the dangerous point information, the collision prediction time and the support level are determined. The accident prevention information is provided after setting the above relationship to the above-described relationship. That is, the change determination unit 36 determines that the support level is “information provision” when the predicted collision time is 4 seconds or more and less than 5 seconds, and the support level when the predicted collision time is 2 seconds or more and less than 4 seconds. Is set to “warning”, and the relationship between the predicted collision time and the support level is set so that the support level is “warning” when the predicted collision time is less than 2 seconds.

  On the other hand, if the change determination unit 36 determines that the vehicle is traveling around the danger point based on the danger point information, the accident prevention information is provided to the driver earlier. Change the provision start time of accident prevention information. The change determination unit 36 considers the danger level information, and when the danger level is “very dangerous”, the change determination unit 36 prevents accidents earlier for the driver than when the danger level is “dangerous”. The provision start time of accident prevention information is changed so that the information is provided.

  For example, if it is determined that the vehicle is traveling around the danger point of the danger level “danger”, the change determination unit 36 provides assistance when the predicted collision time is 4.8 seconds or more and less than 6 seconds. When the level is “information provision” and the collision prediction time is 2.4 seconds or more and less than 4.8 seconds, the support level is “warning” and the collision prediction time is less than 2.4 seconds. Changes the relationship between the predicted collision time and the support level so that the support level is “warning”. Thereby, the change determination part 36 changes provision start time of accident prevention information.

  In addition, when it is determined that the vehicle is traveling around the danger point of the danger level “very dangerous”, the change determination unit 36 determines that the collision prediction time is 5.6 seconds or more and less than 7 seconds. When the support level is “information provision” and the collision prediction time is 2.8 seconds or more and less than 5.6 seconds, the support level is “warning” and the collision prediction time is less than 2.8 seconds. In this case, the relationship between the collision prediction time and the support level is changed so that the support level is “warning”. Thereby, the change determination part 36 changes provision start time of accident prevention information.

  When the relationship between the collision prediction time and the support level is changed by the change determining unit 36, the accident prevention information providing unit 37 responds to the vehicle driver according to the support level according to the changed relationship. Provide accident prevention information.

  The camera 38 is installed in the vehicle in order to image the environment around the vehicle. For example, a camera for a drive recorder can be used as the camera 38.

  The storage device 45 is a storage device that stores various types of information such as danger point information and danger level information acquired by the danger point information acquisition unit 35, and includes a nonvolatile memory, a volatile memory, an HDD (Hard Disk Drive), and the like. Is done.

  The display unit 50 is a display device that displays accident prevention information output by the accident prevention information providing unit 37. The display unit 50 is configured by a liquid crystal display, a head-up display, or the like.

  The sound output unit 60 outputs the accident prevention information output from the accident prevention information providing unit 37 by sound. For example, the sound output unit 60 includes a speaker.

[Server configuration]
FIG. 2 is a block diagram showing a configuration of the server according to Embodiment 1 of the present invention.
The server 6 functions as a danger level determination device that determines a danger level indicating the possibility of an accident occurring at each point, and dangerous point information that provides the vehicle with information on a danger point that is likely to cause a traffic accident. And a function as a providing device.
The server 6 includes a communication unit 70, a control unit 80, and a storage device 90.

  The communication unit 70 includes a communication interface for communicating with the safe driving support device 1 via a mobile phone communication network such as 3G or LTE. The communication unit 70 may include a communication interface for communicating with a roadside communication device.

  The control unit 80 is configured by a CPU or the like, and as a functional component realized by executing a computer program on the control unit 80, a risk factor acquisition unit 81, a risk point determination unit 82, and a risk level determination Unit 83, image acquisition unit 84, and notification unit 85.

  The risk factor acquisition unit 81 receives information about a dangerous event, information about the occurrence position of the dangerous event, and an image obtained by capturing the surroundings of the vehicle from the safe driving support device 1 mounted on the vehicle via the communication unit 70. Receive. The risk factor acquisition unit 81 receives these pieces of information from the safe driving support apparatus 1 for a plurality of vehicles.

  The risk factor acquisition unit 81 obtains, from these received information, vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle, and point dynamic information that is dynamic information relating to the occurrence position of the event. get. Further, the risk factor acquisition unit 81 acquires point static information that is static information related to the occurrence position of the event, and a traffic accident occurrence result at the occurrence position of the event.

  The risk factor acquisition unit 81 is required to acquire the vehicle dynamic information and the point static information, and it is desirable to acquire the point dynamic information and the traffic accident occurrence results, but it is not always necessary to acquire them. Good.

  The vehicle dynamic information includes, for example, whether or not a collision prevention alarm is activated, whether or not a sudden brake operation is performed, whether or not a sudden steering operation is performed, whether or not a sudden acceleration operation is performed, and the like. The risk factor acquisition unit 81 acquires the vehicle dynamic information at the occurrence position of the dangerous event based on the dangerous event information received from the safe driving support device 1. The risk factor acquisition unit 81 stores the acquired vehicle dynamic information in the storage device 90 together with the information on the event occurrence position.

  The point static information includes, for example, the complexity of the point shape at each point, the visibility, whether or not a traffic signal is installed, and the like. The point static information is prepared in advance and stored in the storage device 90. The risk factor acquisition unit 81 acquires the point static information by reading the point static information from the storage device 90.

  The point dynamic information includes, for example, the presence / absence of construction, the presence / absence of a parked vehicle, the number of traveling vehicles, and the presence / absence of a pedestrian at each point. The risk factor acquisition unit 81 acquires point dynamic information by performing image processing on the image received from the safe driving support apparatus 1. Further, the risk factor acquisition unit 81 may acquire point dynamic information by performing image processing on an image acquired from a camera 86 installed on the roadside by an image acquisition unit 84 described later. Since the image processing method is not the main point of the present application, detailed description thereof is omitted. Moreover, the risk factor acquisition part 81 may acquire point dynamic information from the server etc. with which the traffic control center etc. were equipped, for example. The risk factor acquisition unit 81 stores the acquired point dynamic information in the storage device 90.

  The traffic accident occurrence record includes the presence or absence of a traffic accident at each point, the number of occurrences of the traffic accident, and the like. The risk factor acquisition unit 81 acquires a traffic accident occurrence result from, for example, a server provided in a traffic control center or the like. The risk factor acquisition unit 81 causes the storage device 90 to store the acquired traffic accident occurrence information.

  Based on the vehicle dynamic information acquired by the risk factor acquisition unit 81, the danger point determination unit 82 determines a danger point where a traffic accident is likely to occur. For example, the danger point determination unit 82 determines the number of collision prevention alarms, the number of sudden braking operations, the number of sudden steering operations, and the number of sudden steering operations within a predetermined period (for example, the past month) for each occurrence position of a dangerous event. Calculate the total number of acceleration operations. The dangerous point determination unit 82 determines the occurrence position as a dangerous point when the calculated total number of times within a predetermined period is greater than a predetermined threshold (for example, 20 times).

  The danger level determination unit 83 determines the traffic accident for each occurrence position of the dangerous event based on the vehicle dynamic information, the point static information, the point dynamic information, and the traffic accident occurrence result acquired by the risk factor acquisition unit 81. Determine the level of danger that indicates the likelihood of occurrence. For example, the danger level determination unit 83 creates a summary table described below, and determines a danger level based on the created summary table.

FIG. 3 is a diagram illustrating an example of a summary table created by the risk level determination unit 83.
The danger level determination unit 83 counts the vehicle dynamic information within a predetermined period (for example, the past one month) for each occurrence position of the dangerous event (intersection IS1,..., Point PM), and activates the collision prevention alarm. The degree of sudden braking operation, the degree of sudden steering operation, and the degree of sudden acceleration operation are judged. The danger level determination unit 83 describes the determination result in the tabulation table.

  In other words, the danger level determination unit 83 determines that the collision prevention alarm is activated frequently (“many”) when the number of collision prevention alarm activations within the predetermined period is larger than the predetermined alarm frequency threshold, Otherwise, it is determined that the collision prevention alarm is not activated (“low”). For example, the danger level determination unit 83 determines that the operation of the collision prevention alarm at the intersection IS1 is small, and determines that the operation of the collision prevention alarm at the intersection IS2 is large.

  Further, the danger level determination unit 83 determines that the number of sudden braking operations is large (“many”) when the number of sudden braking operations within a predetermined period is greater than a predetermined sudden braking frequency threshold, and otherwise. In this case, it is determined that the sudden braking operation is small (“low”). For example, the danger level determination unit 83 determines that there are few sudden braking operations at the intersections IS1 and IS2.

  Further, the danger level determination unit 83 determines that the number of sudden handle operations is large (“many”) when the number of sudden handle operations within a predetermined period is greater than a predetermined sudden handle count threshold, and otherwise. In this case, it is determined that the operation of the sudden handle is small (“low”). For example, the danger level determination unit 83 determines that there are few sudden handle operations at the intersection IS1, and determines that there are many sudden handle operations at the intersection IS2.

  Also, the danger level determination unit 83 determines that the number of sudden acceleration operations within a predetermined period is larger than the predetermined sudden acceleration number threshold (“many”), and the other cases. In this case, it is determined that the rapid acceleration operation is small (“low”). For example, the danger level determination unit 83 determines that the rapid acceleration operation at the intersections IS1 and IS2 is small.

  Moreover, the danger level determination part 83 describes the point static information which the risk factor acquisition part 81 acquired for every generation | occurrence | production position of a dangerous event in an aggregation table. Here, the point shape is shown as the point static information. That is, the point shape of the intersection IS1 is “simple”, but the point shape of the intersection IS2 is “complex”. In addition, when other information, such as the presence or absence of the traffic signal grounding, is included in the point static information, the danger level determination unit 83 also describes the information in the tabulation table.

  Moreover, the danger level determination part 83 describes the point dynamic information which the risk factor acquisition part 81 acquired for every generation | occurrence | production position of a dangerous event in a total table. Here, the presence / absence of construction, the presence / absence of parked vehicles, the number of traveling vehicles, and the presence / absence of pedestrians are described in the tabulation table as the point dynamic information.

Further, the danger level determination unit 83 aggregates the accident occurrence results acquired by the risk factor acquisition unit 81 for each occurrence position of the dangerous event, and determines the number of the matter occurrence results. The danger level determination unit 83 describes the determination result in the tabulation table.
That is, the risk level determination unit 83 determines that the number of accident occurrences is large (“many”) when the number of accident occurrences within a predetermined period is greater than a predetermined accident occurrence number threshold, In this case, it is determined that the number of accident occurrences is small (“low”).

  The danger level determination unit 83 determines a danger level for each occurrence position of the dangerous event based on the created tabulation table. That is, the danger level determination unit 83 calculates the number of “many”, “complex”, or “present” for each item. For example, the number of intersections IS1 is 0, the number of intersections IS2 is 6, and the number of intersections ISN is 10. The danger level determination unit 83 determines the danger level of occurrence positions whose number is 4 or less as “normal”. The danger level determination unit 83 determines the danger level at the occurrence position where the number is 5 or more and 7 or less as “danger”. The danger level determination unit 83 determines the danger level at the occurrence position where the number is 8 or more as “very dangerous”. For example, since the number of intersections IS1 is 0, the danger level is determined as “normal”. Further, since the number of intersections IS2 is 6, the danger level is determined as “danger”. Further, since the number of intersections ISN is 10, the danger level is determined as “very dangerous”. In addition, the threshold value of the number for determining a danger level is an example, and is not limited to this.

  The risk level determination unit 83 may weight each item when calculating the number of each item. For example, the risk level determination unit 83 calculates the number of items after weighting the point dynamic information more than other information. When the point dynamic information is given twice as much weight as the other information, the number of “present” is 2 for construction, parked vehicles or pedestrians, and the number of “many” is 2 for traveling vehicles. As a result, the number of “many”, “complex” or “present” items at the intersection IS2 is counted as 8, and the number of the intersection ISN is counted as 14. The danger level determination unit 83 determines the danger level by thresholding these numbers.

  As described above, the danger level determination unit 83 determines the danger level based on the vehicle dynamic information, the point static information, the point dynamic information, and the traffic accident occurrence record. May use at least vehicle dynamic information and point static information. That is, it is desirable to determine the danger level using the point dynamic information and the traffic accident occurrence record. However, the point dynamic information and the traffic accident occurrence record are not necessarily used.

  The image acquisition unit 84 acquires, from the camera 86, an image obtained by capturing a road with the camera 86 installed on the roadside.

  The notification unit 85 includes information on the dangerous point determined by the dangerous point determination unit 82 and information on the dangerous level at the dangerous point determined by the dangerous point determination unit 82 among the dangerous levels determined by the dangerous level determination unit 83. The vehicle safety driving support device 1 is notified via the communication unit 70.

  Note that the notification unit 85 uses the dangerous point determined by the dangerous point determination unit 82 and the dangerous level determined by the dangerous level determination unit 83 to provide information on the dangerous point and the dangerous level determined within a predetermined period of safe driving of the vehicle. You may make it notify to the assistance apparatus 1. FIG. For example, by setting the predetermined period to the most recent month, information on the dangerous point and the dangerous level determined in the most recent month is notified to the safe driving support device 1, and the risk determined before that is determined. It is possible to prevent the safe driving support apparatus 1 from being notified of the information on the location and the danger level. Thereby, even if the road condition etc. of a dangerous point changes, the information of a dangerous point can be provided appropriately.

  The storage device 90 stores various types of information such as information acquired by the risk factor acquisition unit 81, information on the risk point determined by the risk point determination unit 82, and information on the risk level determined by the risk level determination unit 83. It is a device and is composed of a nonvolatile memory, a volatile memory, an HDD, and the like.

[Safety driving support device and server processing procedure]
FIG. 4 is a sequence diagram showing processing procedures of the safe driving support apparatus and the server according to Embodiment 1 of the present invention. FIG. 5 is a diagram for explaining a processing procedure of the safe driving support apparatus and the server according to Embodiment 1 of the present invention.

  As shown in FIG. 5, it is assumed that the safe driving support device 1 is installed in the vehicle 2. It is assumed that the vehicle 2 and the vehicle 3 enter the intersection IS and come into contact with each other.

  Note that a camera 86 for monitoring the intersection IS is installed at the intersection IS, and the camera 86 is connected to 6 through a communication line such as the Internet.

  At this time, the dangerous event detection unit 31 of the safe driving support device 1 detects a dangerous event based on a sudden braking operation of the driver of the vehicle 2 (S1).

  The occurrence position detection unit 32 of the safe driving support device 1 detects the occurrence position of the dangerous event detected by the dangerous event detection unit 31, and stores information on the detected occurrence position in the storage device 45 (S2).

  The image acquisition unit 33 of the safe driving support device 1 acquires an image captured by the camera 38 from a camera 38 that is mounted on the vehicle 2 and images the surrounding environment (S3).

  The information transmission unit 34 of the safe driving support apparatus 1 acquires the information on the dangerous event detected by the dangerous event detection unit 31, the information on the occurrence position of the dangerous event detected by the generation position detection unit 32, and the image acquisition unit 33. The image is transmitted to the server 6 via the wireless communication unit 10, and the server 6 receives these pieces of information (S4).

  The risk factor acquisition unit 81 of the server 6 acquires vehicle dynamic information and point dynamic information based on the information received from the safe driving support device 1, and further, the point static information and the traffic accident information An occurrence record is acquired (S5).

  The dangerous point determination unit 82 of the server 6 determines a dangerous point where a traffic accident is likely to occur based on the vehicle dynamic information acquired by the risk factor acquisition unit 81 (S6). The dangerous point determination unit 82 causes the storage device 90 to store information on the determined dangerous point. The risk point determination process may be performed at a predetermined cycle (for example, every other day or every other week).

  The risk level determination unit 83 of the server 6 creates a tabulation table as shown in FIG. 3 based on various information acquired by the risk factor acquisition unit 81, and based on the generated tabulation table, the occurrence position of the risk event Each risk level is determined (S7). The danger level determination unit 83 causes the storage device 90 to store information on the determined danger level. The risk level determination process may be performed at a predetermined cycle (for example, every other day or every other week).

  FIG. 6 is a sequence diagram showing another processing procedure of the safe driving support device 1 and the server 6 according to Embodiment 1 of the present invention. FIG. 7 is a diagram for explaining the processing procedure of the safe driving support apparatus 1 and the server 6 according to Embodiment 1 of the present invention.

  Referring to FIG. 7, it is assumed that intersection IS is determined as a dangerous point by dangerous point determination unit 82 of server 6.

  With reference to FIG. 6, the notification unit 85 of the server 6 transmits the dangerous spot information including the intersection IS and the dangerous level information of the dangerous spot to the safe driving support apparatus 1. The dangerous point information acquisition unit 35 acquires the dangerous point information and the dangerous level information at the dangerous point from the server 6 (S11). The notification unit 85 may periodically transmit the dangerous spot information and the dangerous level information at a predetermined time interval, or may transmit when the dangerous spot or the dangerous level is changed.

  The change determination unit 36 of the safe driving support device 1 has approached the dangerous point based on the position information of the vehicle 2 acquired from the positioning unit 20 and the dangerous point information acquired by the dangerous point information acquiring unit 35. It is determined whether or not (S12). For example, as illustrated in FIG. 7, when the vehicle 2 is traveling at a position within a predetermined distance R from the intersection IS, which is a dangerous point, the change determination unit 36 determines that the vehicle 2 has approached the dangerous point. .

  When it is determined that the vehicle 2 has approached the danger point (YES in S12), the change determination unit 36 sets the accident prevention information providing mode to an alarm warning mode corresponding to the danger level (S13). That is, the change determination unit 36 changes the provision start time of the accident prevention information so that the accident prevention information is provided earlier than usual according to the danger level.

  For example, as described above, the change determination unit 36 determines that the support level is “information provision” when the collision prediction time is 4.8 seconds or more and less than 6 seconds at the danger point where the danger level is “danger”. When the collision prediction time is 2.4 seconds or more and less than 4.8 seconds, the assistance level is “warning”, and when the collision prediction time is less than 2.4 seconds, the assistance level is “alert”. The relationship between the collision prediction time and the support level is changed.

  In addition, the change determination unit 36 sets the support level to “information provision” when the collision prediction time is 5.6 seconds or more and less than 7 seconds at the danger point with the danger level “very dangerous”. When the predicted time is 2.8 seconds or more and less than 5.6 seconds, the assistance level is “warning”, and when the predicted collision time is less than 2.8 seconds, the assistance level is “warning”. As described above, the relationship between the collision prediction time and the support level is changed.

  Thereby, the change determination part 36 can change the provision start time of accident prevention information.

  The change determination unit 36 does not change the provision mode of the accident prevention information at the danger point with the danger level “normal” and sets the provision mode to the normal mode. That is, when the collision prediction time is 4 seconds or more and less than 5 seconds, the support level is “information provision”, and when the collision prediction time is 2 seconds or more and less than 4 seconds, the support level is “calling attention”. When the predicted collision time is less than 2 seconds, the support level is set to “alarm”.

  If it is not determined that the vehicle 2 has approached the danger point (NO in S12), the change determination unit 36 does not change the accident prevention information provision mode and sets the provision mode to the normal mode. Thereby, for example, as described above, when the collision prediction time is 4 seconds or more and less than 5 seconds, the assistance level is set to “information provision” and the collision prediction time is When the time is 2 seconds or more and less than 4 seconds, the support level is “warning”, and when the collision prediction time is less than 2 seconds, the support level is “warning”.

  If the vehicle 2 may collide with another vehicle while the vehicle 2 is traveling around a danger point (for example, within a predetermined distance R from the intersection IS) (YES in S14), the accident prevention information providing unit 37 Accident prevention information at a support level according to the predicted time is provided to the driver through the display unit 50 and the sound output unit 60 (S15).

  As a result, when the vehicle 2 approaches the danger point of the danger level “danger” or “very dangerous”, if there is a possibility of collision with another vehicle, the accident prevention information is provided at an earlier stage than usual. .

  When the vehicle 2 moves away from the surroundings of the danger point (for example, when the vehicle 2 is separated from the intersection IS by a predetermined distance R), the change determination unit 36 returns the accident prevention information providing mode to the normal mode.

[Effects of First Embodiment, etc.]
As described above, according to the first embodiment of the present invention, it is possible to determine the danger level at the occurrence position of the event occurring in the vehicle based on at least the vehicle dynamic information and the point static information. The vehicle dynamic information indicates, for example, an event such as a sudden braking operation or a collision prevention alarm. The point static information indicates, for example, a point shape such as an intersection. For this reason, when the event occurs at an intersection having a complicated shape, the danger level can be determined higher than when the event occurs at an intersection having a simple shape. Thereby, danger point level classification can be performed appropriately.

  Further, the danger level determination unit 83 can further determine the danger level at the event occurrence position in consideration of the point dynamic information. The point dynamic information indicates, for example, the environment of the point that dynamically changes, such as whether or not there is a parked vehicle and whether or not construction is underway. Thereby, even if the environment of a spot changes, the level classification of a dangerous spot can be performed appropriately.

  The danger level determination unit 83 can also determine the danger level at the event occurrence position based on the weighted vehicle dynamic information, point static information, and point dynamic information. For this reason, the danger level can be appropriately determined by adjusting the weight.

  In particular, the danger level determination unit 83 can determine the danger level at the occurrence position of the event, after assigning a larger weight to the point dynamic information. If the point dynamic information changes, it can be considered that the driving of the vehicle is affected. For this reason, a danger level can be determined more appropriately by giving large weighting to point dynamic information.

  Further, the server 6 can notify the safe driving support apparatus 1 of the vehicle 2 of the information on the danger level together with the information on the dangerous point. For this reason, the safe driving support device 1 provides accident prevention information based on the danger level when providing the driver with accident prevention information for preventing traffic accidents when the vehicle 2 passes through the danger point. Whether or not the start time is changed can be determined. Thereby, the safe driving support apparatus 1 can change the provision start time of the accident prevention information when passing through the danger point according to the danger level. For example, when the vehicle 2 passes through a danger point with a high danger level, the safe driving support device 1 prevents the driver from accidents at an earlier timing than when the vehicle 2 passes a danger point with a low danger level. Information can be provided. Thus, accident prevention information is provided to the driver at a timing according to the danger level. For this reason, accident prevention information can be provided to the vehicle 2 at an appropriate timing. Thereby, a traffic accident can be prevented beforehand.

  In the first embodiment, the safe driving support apparatus 1 transmits and receives information to and from the server 6, but relays the roadside communication device 4 installed on the roadside as shown in FIG. Information may be transmitted and received between the driving support device 1 and the server 6.

  Further, the function of the server 6 may be provided in the roadside communication device 4. In this case, information is transmitted and received between the safe driving support device 1 and the roadside communication device 4, and the safe driving support device 1 uses the roadside communication to transmit information on the dangerous point and the risk level determined by the roadside communication device 4. Receive from machine 4.

(Embodiment 2)
In the first embodiment, the server 6 determines the dangerous point and the dangerous level, and the safe driving support device 1 sets the warning / warning mode based on the dangerous point information and the dangerous level information acquired from the server 6. In the second embodiment, the safe driving support device 1 determines the danger point and the danger level, and sets the warning / warning mode based on the information on the decided danger point and danger level.

  FIG. 8 is a block diagram showing the configuration of the safe driving support apparatus according to Embodiment 2 of the present invention.

  1 A of safe driving assistance apparatuses are provided with the control part 30A instead of the control part 30 in the structure of the safe driving assistance apparatus 1 which concerns on Embodiment 1 shown in FIG.

  30 A of control parts are comprised by CPU etc. similarly to the control part 30, and as a functional component implement | achieved by running a computer program on 30 A of control parts, the dangerous event detection part 31 and the generation | occurrence | production position detection part 32, an image acquisition unit 33, a risk factor acquisition unit 39, a risk level determination unit 40, a danger point information acquisition unit 35A, a change determination unit 36, and an accident prevention information provision unit 37.

  The risk factor acquisition unit 39 acquires the risk event information from the risk event detection unit 31, acquires the information on the generation position of the risk event from the generation position detection unit 32, and images the surroundings of the vehicle 2 from the image acquisition unit 33. Get an image.

  The risk factor acquisition unit 39, from these acquired information, vehicle dynamic information indicating an event related to the driving of the vehicle 2 that has occurred in the vehicle 2, and point dynamic information that is dynamic information related to the occurrence position of the event. And get. Further, the risk factor acquisition unit 81 acquires point static information that is static information related to the occurrence position of the event, and a traffic accident occurrence result at the occurrence position of the event. The acquisition method of these pieces of information is the same as that of the risk factor acquisition unit 81 described in the first embodiment.

  That is, the risk factor acquisition unit 39 acquires the vehicle dynamic information of the risk event based on the risk event information acquired from the risk event detection unit 31, and combines the acquired vehicle dynamic information with the event occurrence position information. And stored in the storage device 45.

  Moreover, the risk factor acquisition unit 39 acquires the point static information by reading the point static information stored in the storage device 90 in advance from the storage device 90.

  Further, the risk factor acquisition unit 39 acquires point dynamic information by performing image processing on the image acquired by the image acquisition unit 33. The risk factor acquisition unit 39 may acquire the point dynamic information from the server 6 or a server provided in the traffic control center.

  Further, the risk factor acquisition unit 39 acquires the traffic accident occurrence record from the server 6 or a server provided in the traffic control center. The risk factor acquisition unit 39 causes the storage device 90 to store the acquired traffic accident occurrence information.

  The dangerous point information acquisition unit 35A acquires dangerous point information by determining a dangerous point where a traffic accident is likely to occur based on the vehicle dynamic information acquired by the risk factor acquisition unit 39. The dangerous point information acquisition unit 35A determines a dangerous point using the same method as the dangerous point determination unit 82 described in the first embodiment. Therefore, detailed description thereof will not be repeated here. The dangerous point information acquisition unit 35 </ b> A may acquire dangerous point information from the server 6 via the wireless communication unit 10, similarly to the dangerous point information acquisition unit 35 described in the first embodiment. .

  The danger level determination unit 40 determines the traffic accident for each occurrence position of the dangerous event based on the vehicle dynamic information, the point static information, the point dynamic information, and the traffic accident occurrence result acquired by the risk factor acquisition unit 39. Determine the level of danger that indicates the likelihood of occurrence. The risk level determination unit 40 determines the risk level using the same method as the risk level determination unit 83 shown in the first embodiment. Therefore, detailed description thereof will not be repeated here.

  FIG. 9 is a flowchart showing a processing procedure of the safe driving support apparatus 1A according to Embodiment 2 of the present invention.

  The dangerous event detection unit 31 detects a dangerous event based on a sudden braking operation of the driver of the vehicle 2 (S21).

  The occurrence position detection unit 32 detects the occurrence position of the dangerous event detected by the dangerous event detection unit 31, and stores information on the detected occurrence position in the storage device 45 (S22).

  The image acquisition unit 33 acquires an image captured by the camera 38 from the camera 38 that is mounted on the vehicle 2 and images the surrounding environment (S23).

  The risk factor acquisition unit 39 acquires the vehicle dynamic information and the point dynamic information based on the dangerous event information, the information on the occurrence position of the dangerous event, and an image obtained by imaging the surroundings of the vehicle 2, The point static information and the traffic accident occurrence record are acquired (S24).

  The dangerous point information acquisition unit 35A determines a dangerous point where a traffic accident is likely to occur based on the vehicle dynamic information acquired by the risk factor acquisition unit 39 (S25). The dangerous point information acquisition unit 35A causes the storage device 45 to store information on the determined dangerous point. The risk point determination process may be performed at a predetermined cycle (for example, every other day or every other week).

  The risk level determination unit 40 creates a tabulation table as shown in FIG. 3 based on the various types of information acquired by the risk factor acquisition unit 39, and based on the prepared tabulation table, the risk level is determined for each risk event occurrence position. The level is determined (S26). The danger level determination unit 40 causes the storage device 45 to store information on the determined danger level. The risk level determination process may be performed at a predetermined cycle (for example, every other day or every other week).

  1 A of safe driving assistance apparatuses perform the process of step S27-S30. These processes are the same as the processes in steps S12 to S15 shown in FIG. That is, the accident prevention information is provided according to the warning / warning mode corresponding to the danger level.

[Effect of Embodiment 2]
As described above, according to the second embodiment, the safe driving support device 1A determines the dangerous point and the dangerous level, and changes the provision start time of the accident prevention information based on the determined dangerous point and the dangerous level. It can be carried out. That is, when providing the accident prevention information for preventing a traffic accident when the vehicle 2 passes through the danger point, whether to change the provision start time of the accident prevention information is determined based on the danger level. Thereby, for example, the provision start time of the accident prevention information when the vehicle 2 passes the danger point can be changed according to the danger level. For example, when the vehicle 2 passes through a danger point with a high danger level, accident prevention information can be provided to the driver at an earlier timing than when the vehicle 2 passes through a danger point with a low danger level. . As described above, the accident prevention information is provided to the driver at a timing corresponding to the danger level, so that the accident prevention information can be provided to the driver at an appropriate timing. For this reason, a traffic accident can be prevented beforehand.

[Appendix]
As mentioned above, although the safe driving assistance apparatus and server which concern on embodiment of this invention were demonstrated, this invention is not limited to this embodiment.

  The present invention may be a computer program for causing a computer to function as the above-described safe driving support device and server.

  Further, the present invention may be the one in which the computer program is recorded on a computer-readable non-transitory recording medium, such as an HDD, a CD-ROM, or a semiconductor memory.

  In the present invention, the computer program or the digital signal may be transmitted via an electric communication line, a wireless or wired communication line, a network represented by the Internet, a data broadcast, or the like.

The safe driving support device and the server may be realized by a plurality of computers.
Furthermore, the above embodiments may be combined.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1, 1A Safe driving assistance apparatus 2, 3 Vehicle 4 Roadside communication device 5 Traffic signal device 6 Server 10 Wireless communication part 20 Positioning part 21 GPS receiver 22 Acceleration sensor 30, 30A, 80 Control part 31 Hazardous event detection part 32 Generation | occurrence | production position detection Units 33 and 84 Image acquisition unit 34 Information transmission unit 35 and 35A Risk point information acquisition unit 36 Change determination unit 37 Accident prevention information provision unit 38 and 86 Camera 39 and 81 Risk factor acquisition units 40 and 83 Risk level determination units 45 and 90 Storage device 50 Display unit 60 Sound output unit 70 Communication unit 82 Hazardous point determination unit 85 Notification unit

Claims (11)

A risk factor acquisition unit that acquires vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle, and point static information that is static information regarding an occurrence position of the event;
A danger level determination unit that determines a danger level indicating the possibility of occurrence of a traffic accident at the occurrence position based on the vehicle dynamic information and the point static information acquired by the risk factor acquisition unit. Decision device. The risk factor acquisition unit further acquires point dynamic information which is dynamic information regarding the occurrence position of the event,
The said danger level determination part determines the said danger level in the said generation | occurrence | production position based on the said vehicle dynamic information which the said risk factor acquisition part acquired, the said point static information, and the said point dynamic information. The danger level determination device described. The danger level determination unit weights at least one of the vehicle dynamic information, the point static information, and the point dynamic information acquired by the risk factor acquisition unit more than other information. The danger level determination apparatus according to claim 2, wherein the danger level is determined based on the vehicle dynamic information, the static point information, and the dynamic point information after weighting. The danger level determination device according to claim 3, wherein the danger level determination unit weights the point dynamic information more than the vehicle dynamic information and the point static information. The danger level determination device further includes:
A dangerous point information acquisition unit for acquiring dangerous point information indicating the position of a dangerous point where a traffic accident is likely to occur;
The danger level determination unit determines whether or not the provision start time of the accident prevention information is changed when providing the accident prevention information for preventing a traffic accident to the driver of the vehicle when the vehicle passes the danger point. The risk determination apparatus according to any one of claims 1 to 4, further comprising: a change determination unit configured to determine based on the risk level of the determined occurrence position. The danger level determination device further includes:
Based on the vehicle dynamic information acquired by the risk factor acquisition unit, a risk point determination unit that determines a risk point that is highly likely to cause a traffic accident,
The notification part which notifies the vehicle of the information on the danger point determined by the danger point determination part and the information on the danger level at the danger point determined by the danger level determination part. 5. The danger level determination device according to any one of 4 above. An information providing apparatus that is mounted on a host vehicle and provides accident prevention information for preventing a traffic accident to a driver of the host vehicle,
A danger point information acquisition unit that acquires information on the danger point and information on the danger level at the danger point from the danger level determination device according to claim 6;
Whether the provision start time of the accident prevention information when the accident prevention information is provided to the driver is indicated in the danger point information and the danger level information acquired by the danger point information acquisition unit. An information providing apparatus comprising: a change determining unit that determines based on the information. Obtaining vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle, and point static information that is static information relating to the occurrence position of the event;
Determining a danger level indicating the possibility of occurrence of a traffic accident at the location of occurrence based on the acquired vehicle dynamic information and the point static information. An information providing method by an information providing apparatus mounted on the own vehicle and providing accident prevention information for preventing a traffic accident to a driver of the own vehicle,
Obtaining from the danger level determination device according to claim 6 information on the danger point and information on the danger level at the danger point;
Determining whether or not to change the provision start time of the accident prevention information when providing the accident prevention information to the driver based on the acquired information on the dangerous point and the information on the danger level; Information providing method including Computer
A risk factor acquisition unit that acquires vehicle dynamic information indicating an event relating to driving of the vehicle that has occurred in the vehicle, and point static information that is static information regarding an occurrence position of the event;
Based on the vehicle dynamic information and the point static information acquired by the risk factor acquisition unit, function as a risk level determination unit that determines a risk level indicating the possibility of occurrence of a traffic accident at the occurrence location. Computer program for. A computer program for causing a computer to function as an information providing device that is installed in a host vehicle and provides accident prevention information for preventing a traffic accident to a driver of the host vehicle,
The computer,
A danger point information acquisition unit that acquires information on the danger point and information on the danger level at the danger point from the danger level determination device according to claim 6;
Whether the provision start time of the accident prevention information when the accident prevention information is provided to the driver is indicated in the danger point information and the danger level information acquired by the danger point information acquisition unit. A computer program for functioning as a change determining unit that determines based on the above.

Images