JP2014016883A - System and method of dangerous place notification - Google Patents

Abstract

A warning notification is effectively provided at a place where a dangerous driving action such as ignoring a sign is likely to be performed even at a place where the driver first visits.
A danger location notification system for notifying a vehicle occupant of a danger location, provided near a road, a vehicle motion detection means for detecting the motion of the vehicle, and a vehicle detected by the detection means. A dangerous behavior that is a ratio of vehicles that have performed a dangerous behavior in the number of vehicles traveling on a road near a place where the vehicle motion detection means is installed. Storage means for storing a ratio, and risk information relating to the installation location of the vehicle motion detection means, which is determined based on the dangerous action ratio stored in the storage means, is transmitted to the vehicle. And transmitting means for notifying a vehicle occupant of a dangerous location based on the risk information transmitted from the transmitting means.
[Selection] Figure 2

Description

  The present invention relates to a dangerous point notification system and method for notifying a dangerous point to a vehicle occupant.

  As a technology for supporting driving of a vehicle, there is a technology for urging a vehicle occupant to alert at a dangerous place. For example, an intersection can be cited as a dangerous location. Of the accidents between cars, the percentage of encounter accidents at intersections is large. In order to prevent encounter accidents, it is effective to provide a temporary stop sign to ensure a temporary stop. However, in reality, the vehicle may not be temporarily stopped due to oversight of the sign.

  As a method of alerting for the purpose of preventing accidents, it is conceivable to notify the driver of the presence of a stop sign from the in-vehicle device. However, it is troublesome for the driver to notify the driver at all the stop signs. Therefore, it is preferable to notify only about a sign that is likely to be overlooked. However, it is generally difficult to determine whether the driver has missed the sign by behavior prediction on the in-vehicle device side.

  In the driving support apparatus described in Patent Document 1, it is detected that the driver has committed a traffic violation, and the violation location is stored. Then, at a place where a violation has been committed a predetermined number of times or more in the past, a warning that promotes compliance with traffic rules is given.

  In the above description, as an example of a dangerous act, a case where a stop sign is ignored has been described as an example, but the above discussion also applies to any other dangerous act. As another example of a dangerous action, an action that is likely to cause a danger such as violation of arbitrary traffic rules, sudden acceleration / deceleration, and sudden turning can be cited. Although it is troublesome for the driver to give warnings at all points where such dangerous acts are likely to occur, the driver can be warned only at the points where there is a high possibility that dangerous acts will actually take place. If it is effective.

JP 2011-242839 A

  In the method described in Patent Document 1, a warning is not issued unless the driver (or vehicle) performs dangerous actions a predetermined number of times or more. In other words, there is a problem that no warning is given in places where the driver first visits.

  Therefore, an object of the present invention is to provide a technology that can effectively warn a place where a dangerous action is likely to be performed even if the driver has not performed a dangerous action in the past.

In order to solve the above-described problems, the present invention provides a danger location notification system that notifies a vehicle occupant of a danger location. A danger location notification system according to the present invention is provided near a road, and includes a vehicle operation detection unit that detects the operation of the vehicle, and a risk that determines whether the operation of the vehicle detected by the detection unit is a dangerous action. An action determination means, a storage means for storing a dangerous action ratio that is a ratio of a vehicle that has performed a dangerous action in the number of vehicles traveling on a road near a place where the vehicle motion detection means is installed, and a vehicle motion detection means Transmitting means for transmitting risk information relating to the installation location to the vehicle, the risk information determined based on the dangerous action ratio stored in the storage means, and the risk transmitted from the transmitting means An informing means for informing a vehicle occupant of a dangerous location based on the degree information.

  As described above, the vehicle motion detection means provided near the road detects the motion of the vehicle and determines whether or not the motion is a dangerous act. Further, based on the risk level information generated based on the determination result, the notification unit notifies the vehicle occupant of the dangerous location. That is, since the vehicle motion detection means is provided in the vicinity of the road, it is possible to detect how many vehicles out of the vehicles traveling at the point perform dangerous acts. It is considered that the more dangerous the vehicle, the more dangerous the vicinity of the place where the vehicle motion detection means is installed. Based on the actual vehicle operation, it is determined whether or not it is a dangerous place, and it is possible to grasp a point where a dangerous action is likely to be performed. And since it can warn only about such a place, troublesomeness for the passenger | crew of a vehicle is suppressed. In addition, a warning can be received even in a place where no dangerous acts have been performed in the past such as visiting for the first time.

  In the present invention, the risk level information may be any information as long as it is information indicating the risk level of the place where the vehicle motion detection means is installed or the possibility that a dangerous action is performed. As an example, the risk level information may be a dangerous action ratio (a ratio of vehicles that have performed a dangerous action in the number of detected vehicles) stored in the storage unit. In this case, it is preferable that the informing means informs the occupant of the vehicle of the dangerous location when the received dangerous act ratio is equal to or greater than a predetermined threshold value.

  In this way, it is possible to select how often the warning is performed by changing the threshold value used in the notification means.

  As another example of the danger level information, information indicating whether or not the installation location of the vehicle motion detection means is a danger location may be used. In this case, the dangerous location notification system according to the present invention includes a dangerous location determination means for determining whether or not the installation location of the vehicle motion detection means is a dangerous location based on the dangerous behavior ratio stored in the storage means. Furthermore, it is preferable to have. In addition, it is preferable that the notifying unit notifies the danger location to the vehicle occupant when the risk level information indicating that the danger location is received.

  In this way, it is not necessary to determine whether or not to notify the vehicle, so the processing in the vehicle is reduced.

  Further, in the present invention, the dangerous action is any action that may cause a dangerous state in driving the vehicle, an action that is often taken in a dangerous state (an action for avoiding a dangerous situation, Act to accompany the situation). For example, actions that can cause a dangerous state include traffic rule violations, sudden acceleration / deceleration, sudden turning, and diffuse driving such as side-by-side driving and snoozing driving. Sudden acceleration / deceleration and sudden turning can be regarded as actions to avoid dangerous situations.

  Moreover, the act which violates the rule instruct | indicated by a traffic sign as a dangerous act can be mentioned. For example, an act of not performing a temporary stop near the stop sign or an act of making a right turn near the right turn prohibition sign. In this case, it is preferable that the vehicle motion detection means is provided at substantially the same location as the traffic sign installation location.

In the present invention, the vehicle motion detection means can employ an appropriate device depending on what dangerous action is detected. As the vehicle motion detection means, for example, an imaging means for photographing a vehicle can be used. In this case, the dangerous action determining means can determine whether or not the operation of the vehicle detected by performing image processing on the image taken by the imaging means is a dangerous action.

  The dangerous location notification system according to the present invention can be constituted by a roadside device, a server device, and a vehicle. In that case, it is preferable that the roadside machine has vehicle operation detection means and dangerous action determination means, the server device has storage means and transmission means, and the vehicle has notification means. Furthermore, it is preferable that the roadside device has a notification unit that notifies the server device of the number of detected vehicles and the number of vehicles that have performed dangerous actions. The server device updates the storage unit based on the information notified from the notification unit of the roadside machine.

  If it does in this way, it will become possible to grasp | ascertain the risk in a roadside machine installation location in a server apparatus. Then, by transmitting the risk level information from the server device to the vehicle, it is possible to notify the dangerous location in the vehicle.

  Various methods are conceivable for transmitting the risk information from the server device to the vehicle. For example, the requesting means of the vehicle requests the server device for the risk information about the installation location of the roadside machine, and the server device responds to the request and the risk information about the installation location of the requested roadside machine. To the vehicle. And the alerting | reporting means of a vehicle alert | reports to a passenger | crew that the installation location of a roadside machine is a danger location based on the received risk information. For example, if the risk level information is a dangerous behavior ratio, the passenger is notified when the received dangerous behavior ratio is equal to or greater than a predetermined threshold. If the risk level information is information indicating whether or not the roadside machine installation location is a danger location, the notification means performs notification when the received risk level information indicates that the location is a danger location.

  Thus, by acquiring the risk information of the installation location of the roadside machine from the server device as necessary, it is not necessary to store information in the vehicle.

  Further, the server device transmits in advance risk information about the installation locations of a plurality of roadside machines to the vehicle, and the vehicle notification means has an installation location of the roadside machine that is a danger location near the position of the vehicle. It may be determined based on the risk level information, and if there is a dangerous location, the passenger may be notified that the location where the roadside machine is installed is a dangerous location. Also in this case, the risk level information may be a dangerous act ratio, or may be information indicating whether or not it is a dangerous place.

  In addition, the danger location notification system according to the present invention can also be composed of a roadside machine and a vehicle. In this case, the roadside machine has vehicle motion detection means, dangerous action determination means, storage means, and transmission means. The vehicle also has a notification means. Then, road-to-vehicle communication is performed between the roadside machine and the vehicle, and risk information regarding the installation location of the roadside machine is transmitted to the vehicle approaching the roadside machine.

  If it does in this way, the same effect as the above can be acquired, without using a management server.

  In addition, this invention can also be grasped | ascertained as a dangerous location alerting | reporting system which has at least one part of the said means. The present invention can also be understood as a vehicle, a roadside machine, and a server device having at least a part of the above means. Further, the present invention can be understood as a dangerous location notification method for executing at least a part of the above processing. The present invention can also be understood as a computer program for causing a computer to execute this method. Each of the above means and processes can be combined with each other as much as possible to constitute the present invention.

  According to the present invention, it is possible to effectively warn a place where a dangerous action is likely to be performed even in a place where the driver has not performed a dangerous action in the past.

It is a figure showing the system outline of the temporary stop sign information system concerning a 1st embodiment. It is a figure which shows the functional block of the temporary stop sign alerting | reporting system concerning 1st Embodiment. It is a figure which shows the table structure of the temporary stop vehicle number database in 1st Embodiment. It is a flowchart which shows the flow of the vehicle operation detection process which the roadside machine in 1st Embodiment performs. It is a flowchart which shows the flow of the database update process which the server apparatus in 1st Embodiment performs. It is a flowchart which shows the flow of the warning alerting | reporting process which the vehicle in 1st Embodiment performs. It is a flowchart which shows the flow of a process at the time of receiving the risk information request | requirement which the server apparatus in 1st Embodiment receives. It is a figure which shows the system outline | summary of the temporary stop sign alerting | reporting system concerning the modification of 1st Embodiment. It is a figure which shows the system outline | summary of the temporary stop sign alerting | reporting system concerning 2nd Embodiment. It is a figure which shows the functional block of the temporary stop sign alerting | reporting system concerning 2nd Embodiment.

<System overview>
The first embodiment of the present invention is a stop sign notifying system (dangerous place notifying system) that warns about a stop sign that is easily ignored. FIG. 1 is a diagram illustrating an overview of a system according to the present embodiment. The temporary stop sign notification system according to the present embodiment includes a roadside machine 100 provided in the vicinity of a temporary stop sign A, a server device 200, and a vehicle 300. In FIG. 1, only one of the roadside machine 100, the server device 200, and the vehicle 300 is illustrated, but the system may include a plurality of these elements.

  The roadside machine 100 determines whether the vehicle B passing through the pause point has paused or ignored the pause by photographing the vehicle with the camera and image processing, and ignores the total number of detected vehicles and the pause of them. Count the number of vehicles The number of detected vehicles and the number of neglected vehicles counted by the roadside device 100 are appropriately sent to the server device 200 and are totaled by the server device 200. Then, the ratio of vehicles that ignore the stop sign A is notified from the server device 200 to the vehicle 300, and if the ignore ratio is high, a warning is given to notify the driver of the presence of the stop sign in the vehicle 300.

<Configuration>
FIG. 2 is a diagram showing functional blocks of the temporary stop sign notification system according to the present embodiment. The roadside machine 100 includes a camera 110, a temporary disregarding vehicle detection unit 120, and a measurement result notification unit 130.

The camera 110 is installed in the vicinity of the road so that it can be monitored in order to determine whether or not the predetermined place on the road is a dangerous place. In this embodiment, since the place to be monitored is a temporary stop location, the camera 110 is provided near the temporary stop sign, and photographs the vehicle B passing through the temporary stop location. The resolution and frame rate of the camera 110 may be arbitrary as long as the operation of the vehicle B can be determined. The camera 110 corresponds to the vehicle motion detection means in the present invention.

  The temporary stop ignoring vehicle detection unit 120 performs image processing on the image captured by the camera 110 to detect that the vehicle B has traveled through the temporary stop point and to actually stop the vehicle B at the temporary stop point. Detect if it has been done. As a result, the number of vehicles traveling at the temporary stop point and the number of vehicles ignoring the temporary stop can be grasped. The temporary stop ignoring vehicle detection unit 120 corresponds to the dangerous action determination means in the present invention. The temporary stop ignoring vehicle detection unit 120 realizes the above function by executing a software program in an information processing device (computer) including an arithmetic device and a storage device. However, the temporary stop ignoring vehicle detection unit 120 may be realized by a dedicated hardware circuit.

  The measurement result notification unit 130 is a functional unit that notifies the server device 200 of the number of vehicles and the number of neglected vehicles detected by the temporary disregarding vehicle detection unit 120. The roadside device 100 and the server device 200 may be wireless communication or wired communication, and any communication method can be adopted. The timing for notifying the measurement result may be arbitrary. The timing at which the notification is performed can be made every time one vehicle passes, every time a predetermined number of vehicles pass, or every time a predetermined time elapses. The measurement result notification unit 130 determines the number of vehicles that have traveled through the temporary stop point and the number of vehicles that have ignored the temporary stop from the most recent notification until the current notification is performed. The server apparatus 200 is notified of the stop sign A) together with an identifiable identifier.

  The server device 200 includes a database update unit 210, a temporarily stopped vehicle number database 220, and a risk information transmission unit 230. The server device 200 is an information processing device (computer) including an arithmetic device, a storage device, and the like, and each of the functional units described above is realized by executing a software program. However, some or all of the functional units may be realized by a dedicated hardware circuit.

  The database update unit 210 receives the measurement result from the measurement result notification unit 130 of the roadside machine 100 and updates the temporarily stopped vehicle number database 220. The database update unit 210 receives measurement results from a plurality of roadside devices and manages the measurement results regarding the plurality of roadside devices. The temporary stop vehicle number database 220 shows the ratio of the number of vehicles traveling on the road near the installation location of the roadside machine 100, that is, the installation location of the temporary stop sign A, and the number of vehicles ignoring the temporary stop shown in the total number. Remember. The database 220 may hold any type of data as long as it is a method that allows the ratio of vehicles that are ignored to be temporarily stopped. In the present embodiment, the database 220 stores data in a table format as shown in FIG. That is, the database 220 includes the identifier (ID) of the roadside device 100 (or the stop sign A), the number of vehicles detected near the stop sign, the number of vehicles ignoring the stop sign, and the stop sign. The risk level information is stored. The number of detected vehicles and the number of ignored vehicles can be obtained by accumulating the numbers notified from the roadside device 100. The danger level information is an index representing the degree of danger at the place where the stop sign is installed, and is specifically determined from the number of detected vehicles and the number of neglected vehicles so that the value becomes so large that the pause is easily ignored. The degree-of-risk information can be determined as a ratio of the number of vehicles that are disregarded temporarily to the number of detected vehicles.

The risk information transmission unit 230 transmits risk information regarding the stop sign to the vehicle 300. Server device 200 and vehicle 300 can communicate with each other by wireless communication. A specific communication method of wireless communication is not particularly limited, and any method can be adopted. Regarding the timing at which the risk information transmitting unit 230 transmits the risk information related to the stop sign to the vehicle 300, a method for transmitting the risk information in response to a request for the risk information about the specific stop sign from the vehicle, and the server apparatus 200 There is a method for delivering risk information about one or more stop signs. In the present embodiment, risk level information is transmitted in response to a request from the vehicle 300.

  The vehicle 300 includes an in-vehicle terminal 310 including a route search unit 320, a temporary stop sign specifying unit 330, a risk information request unit 340, and a notification unit 350. The in-vehicle terminal 310 is an information processing device (computer) that includes an arithmetic device, a storage device, and the like, and each of the functional units described above is realized by executing a software program. However, some or all of the functional units may be realized by a dedicated hardware circuit.

  The route search unit 320 includes a position information acquisition unit and a map information storage unit (both not shown), and has a function of searching for a route from the current position to the destination and presenting it to the driver of the vehicle. The route searched by the route search unit 320 is a planned travel route on which the vehicle 300 will travel in the future.

  The stop sign specifying unit 330 specifies a stop sign at the closest position on the planned travel route of the vehicle 300. This specification can be performed by storing the position of the stop sign in the map information storage unit. The temporary stop sign may be specified by an identifier (ID) unique to the sign, or may be specified by an installation position (for example, latitude / longitude information or map code).

  The risk information requesting unit 340 requests the server device 200 for risk information regarding the stop sign specified by the stop sign specifying unit 330 by wireless communication. The risk information request unit 340 passes the risk information acquired from the server device 200 to the notification unit 350.

  The notification unit 350 is a functional unit that notifies the driver of the vehicle of the presence of a stop sign by voice output or image output. In the present embodiment, the notification unit 350 performs notification when the stop sign is a dangerous part that is easily ignored based on the risk information acquired from the server device 200. Specifically, when the degree of risk information acquired from the server device 200, that is, the ratio of the vehicles that ignore the pause in the number of detected vehicles is equal to or greater than a predetermined threshold, the stop sign is given to the vehicle occupant. A warning is issued to warn you that it is dangerous to be ignored. The threshold value may be changeable by the user, or may be a setting value that cannot be changed by the user.

<Method>
The flow of processing performed by each device in the present embodiment will be described with reference to a flowchart.

First, the vehicle motion detection process performed by the roadside machine 100 will be described with reference to the flowchart of FIG. The process shown in FIG. 4 is repeatedly executed periodically. The roadside device 100 takes a picture of the vicinity of the temporary stop with the camera 110 (S41). Therefore, when the vehicle travels in the vicinity of the pause point, the camera 110 acquires an image of the vehicle. The temporarily disregarded vehicle detection unit 120 performs image processing technology such as pattern matching on the captured image, and determines whether the vehicle is reflected in the captured image (S42). When the vehicle is shown (S42-YES), it is determined whether or not the vehicle is temporarily stopped at the stop position (S43). Specifically, it is determined whether or not the vehicle has stopped for a predetermined frame at the pause position. In accordance with the determination result, the number of detected vehicles and the number of vehicles that are temporarily ignored are measured (S44), and the measurement results are notified to the server device 200 via the measurement result notification unit 130 (S45). The notification to the server device 200 is performed in, for example, a data format of [roadside machine ID, number of detected vehicles, number of vehicles for which pause is ignored]. In the flowchart of FIG. 4, since the measurement result is notified every time one vehicle is detected, for example, when the detected vehicle is temporarily stopped, data [A, 1, 0] is notified, When the detected vehicle is not temporarily stopped, data [A, 1, 1] is notified. However, as described above, the timing for notifying the server apparatus 200 of the measurement result may be arbitrary.

  Next, processing performed by the server device 200 that has received the measurement result notification from the roadside device 100 will be described with reference to the flowchart of FIG. The database update unit 210 receives the number of detected vehicles and the number of vehicles that are disregarded temporarily, which are measurement results, from the measurement result notification unit 130 of the roadside device 100 (S51). Then, the database update unit 210 updates the contents of the temporarily stopped vehicle number database 220 according to the received measurement result (S52). Specifically, for the record having the roadside machine ID included in the received measurement result, the values included in the received measurement result are integrated in the fields of the number of detected vehicles and the number of ignored vehicles. Further, the value of the risk information is updated based on the updated number of detected vehicles and number of ignored vehicles fields.

  Next, processing performed by the vehicle 300 traveling on the road will be described with reference to the flowchart of FIG. The stop sign identifying unit 330 acquires the planned travel route from the route searching unit 320 (S61), and identifies the stop sign closest to the vehicle 300 on the planned travel route (S62). This identification process can be performed by referring to the map information. Then, the risk information request unit 340 requests the server for risk information regarding the stop sign specified in step S62 (S63).

  Here, the processing of the server device 200 when receiving a request for risk information from the vehicle 300 will be described with reference to FIG. When the server device 200 receives a risk information request from the vehicle 300 (S71), the server device 200 acquires risk information of the requested stop sign from the database 220 (S72). If the risk information request includes an identifier of a roadside device, the risk information of a record having the identifier may be acquired. When the roadside machine position information is included in the risk information request, the server apparatus 200 obtains the roadside machine identifier from the database storing the correspondence between the roadside machine identifier and the installation position, and uses the identifier. What is necessary is just to acquire the risk information of the record which has. The risk level information transmission unit 230 transmits the acquired risk level information to the vehicle 300 (S73).

  Returning to FIG. 6, the description of the process performed by the vehicle 300 is continued. When the risk information requesting unit 340 receives risk information about the requested stop sign from the server device 200 (S64), the risk information request unit 340 determines whether the risk information is equal to or greater than a predetermined threshold (S65). ). If the danger level information is less than the threshold value (S65-NO), it is determined that the temporary stop sign is not a particularly dangerous part and no warning is given. On the other hand, if the risk information is equal to or greater than the threshold value (S65-YES), when the vehicle 300 approaches the stop sign to some extent (S66-YES), the vehicle passenger is alerted to the stop sign. A warning for prompting is issued (S67).

<Operation and effect of this embodiment>
In the temporary stop sign notification system according to the present embodiment, it is possible to analyze the operation of the vehicle at the temporary stop location and grasp the location where the temporary stop is easily ignored. The location where there are many vehicles ignoring the temporary stop may be a situation that gives an impression that it looks good at first glance, or the road environment is complicated and it is easy to overlook the signs. Although it is difficult to quantitatively calculate the determination of the danger level of the sign by actually examining these factors, in this embodiment, since the ratio that the sign is ignored is acquired based on the actual measurement, the accuracy is high. The dangerous part can be judged.

Further, in the vehicle, warning notification for prompting attention can be performed only for a stop sign having a predetermined degree of risk or higher. Therefore, the troublesomeness for the vehicle occupant is also suppressed. Further, if the threshold value for determining whether or not to perform warning notification can be changed, warning notification can be performed at an appropriate frequency according to the vehicle occupant.

<Modification of First Embodiment>
The above description is illustrative and various modifications are possible. Hereinafter, modifications of the temporary stop sign notification system according to the first embodiment will be described.

  In the above description, the roadside device 100 has been described as counting the number of detected vehicles and the number of vehicles that are ignored temporarily at the stop sign location, and notifying the server device 200 of them. However, the number of detected vehicles and the number of vehicles that comply with the pause may be counted, or the number of vehicles that comply with the pause and the number of vehicles that ignore the pause may be counted. Obviously, both are technically synonymous.

  In the above description, the server 300 is requested to request the risk information about the latest stop sign from the vehicle 300. However, the risk information about a plurality of stop signs is requested at a time. It doesn't matter. For example, the risk information may be requested for a predetermined number of temporary stop signs that are on the planned travel route and are close to the current position of the vehicle 300. Further, the risk information may be requested for a stop sign that is on the planned travel route and within a predetermined distance from the current position of the vehicle 300. Moreover, it is not always necessary to limit to the stop sign located on the planned travel route, and the risk information may be requested for the stop sign not located on the planned travel route. In the case where the vehicle 300 holds risk level information about a plurality of stop signs, a warning is issued when a dangerous location exists near the current position of the vehicle, that is, when the vehicle 300 approaches the dangerous location. It is preferable to do so.

  In the above description, the risk information is transmitted from the server device 200 to the vehicle 300 in response to a request from the vehicle 300. However, the risk information is transmitted from the server device 200 to the vehicle 300 without a request from the vehicle 300. You may make it deliver to. In this case, the risk information regarding the suspended vehicles near the distribution point is collectively distributed to the vehicle 300, and the vehicle 300 stores the distributed information in a storage device, and refers to the vicinity of the current position of the vehicle. It is preferable to perform warning notification when there is a dangerous place in the area.

  Further, in the above description, the risk information is transmitted from the server device 200 to the vehicle 300, and it is determined whether or not warning notification is to be performed in the vehicle 300 based on the risk information. However, the server device 200 may determine whether to perform warning notification. In other words, the risk level information transmitted from the server device 200 to the vehicle 300 may include information indicating whether or not the temporary stop sign is a dangerous point that needs to be alerted. In this case, is the server device 200 a dangerous place where the stop sign needs to be warned based on a measurement result obtained from the roadside device 100 (such as the ratio of the number of detected vehicles and the number of vehicles that ignore the pause)? It is preferable to have a risk location determination unit for determining whether or not. In the vehicle 300, when the information indicating that the stop sign is dangerous is included in the danger level information, a warning notification for prompting attention is performed.

  If the danger level information does not include the ratio of ignoring the pause and includes information indicating whether warning notification should be performed or not, a stop sign that does not require warning notification is given to the vehicle 300 as a risk level. It is not always necessary to send information. In particular, when the risk information is distributed from the server device 200 instead of in response to a request from the vehicle 300, it is preferable that the risk information is distributed only for a stop sign that requires warning notification. .

Moreover, although each process demonstrated above needs to image | photograph with a camera in a roadside machine and to perform alerting | reporting in a vehicle, for example, other processes may be performed in any apparatus.
What is necessary is just to design suitably how a process is shared between the roadside machine demonstrated in FIG. 1 etc., a server apparatus, a vehicle, or the arbitrary apparatuses connected by communication in addition to these.

  For example, in the above description, it has been described that the identification of the stop sign on the planned travel route is acquired by processing inside the vehicle 300. However, as illustrated in FIG. The route may be notified, and a stop sign located on the route may be acquired. Further, the stop sign may be specified by the server device 200. For example, the planned travel route may be transmitted from the vehicle 300 to the server device 200 as in FIG. 8, and a temporary stop sign on the travel route may be acquired. Alternatively, when the travel route information is transmitted from the vehicle 300, the position of the temporary stop sign on the travel route and the risk level information regarding the temporary stop sign may be transmitted to the vehicle 300.

  For example, an image captured by a roadside camera may be transmitted to a server device or another device, and image processing or the like may be performed by a transmission destination device.

(Second Embodiment)
The second embodiment of the present invention is also a stop sign notification system that warns about a stop sign that is easily ignored. However, this embodiment is different from the first embodiment in that no server device is used. FIG. 9 is a diagram showing a system outline of the temporary stop sign notification system according to the present embodiment. In the present embodiment, the number of detected vehicles detected by the roadside device 500 and the number of vehicles that are temporarily ignored are aggregated in the roadside device 500, and risk information is calculated. Then, the risk information is transmitted from the roadside device 500 to the vehicle 600 heading for the temporary stop sign position. Based on the risk information transmitted from the roadside device 500, the vehicle 600 performs a warning notification to call attention.

  FIG. 10 is a diagram showing a stop sign notification system functional block according to the present embodiment. The roadside machine 500 includes a camera 510, a temporarily disregarded vehicle detection unit 520, a temporarily stopped vehicle number database 530, and a risk information transmitting unit 540.

  The camera 510 and the temporary stop ignoring vehicle detection unit 520 are the same as the camera 110 and the temporary stop ignoring vehicle detection unit 120 in the first embodiment. The temporarily stopped vehicle number database 530 is the same as the temporarily stopped vehicle number database 220 in the first embodiment. As described above, the only difference is whether the measurement result is transmitted from the roadside device 100 to the server device 200 and processed, or whether the processing is performed in the roadside device 500. In the present embodiment, it is sufficient to store only information about the roadside device 500 in the temporarily stopped vehicle number database 530. However, information on other roadside devices may be acquired and stored by communication with other roadside devices.

  The degree-of-risk-information transmission unit 540 uses the predetermined range behind the stop sign as a communication range, and distributes risk information about the stop sign to the vehicle by road-to-vehicle communication.

  The vehicle 600 includes a risk information receiving unit 610 and a notification unit 620. The risk information receiving unit 610 receives the risk information distributed from the roadside device 500. In the same way as in the first embodiment, the notification unit 620 performs warning notification by voice, image, or the like based on the received risk level information when the stop sign is a dangerous part that is easily ignored. For example, when the dangerous behavior rate is included in the risk level information, a warning is notified when the dangerous behavior rate is equal to or higher than a predetermined threshold value.

Also in this embodiment, information indicating whether or not the location where the stop sign is installed is a dangerous location is transmitted from the roadside device 500 to the vehicle 600 as the risk information, and the vehicle 600 receives a warning when receiving this danger information. Notification may be performed. In addition, the matters described as modifications of the first embodiment can be applied to the present embodiment as long as they are consistent with the present embodiment.

  According to the present embodiment, an equivalent effect can be obtained with a simpler configuration than in the first embodiment.

(Modification)
The first and second embodiments are both stop sign notification systems that issue a warning about a stop sign, but the present invention is not limited to a system that gives a warning about a stop sign. The present invention can be understood as a dangerous location notification system that issues a warning regarding an arbitrary dangerous location. That is, it can be understood as a dangerous location notification system that notifies a dangerous location to a vehicle occupant.

  Here, the dangerous place is a place where many vehicles are performing dangerous acts. Dangerous actions include actions that are likely to cause dangerous situations and actions that are often taken in dangerous situations. Actions that are likely to cause dangerous conditions include traffic rule violations, sudden acceleration / deceleration, sudden turning (steep steering wheel), diffuse driving such as side-by-side driving and snoozing driving. The sudden acceleration / deceleration and the sudden turn can be regarded as an action that has a high possibility of causing a dangerous state, or can be regarded as an action that is taken to avoid the danger in the dangerous state. In any case, these actions are regarded as dangerous actions, and a place where many dangerous actions are performed may be determined as a dangerous place.

  Since traffic rules are often instructed by traffic signs, a roadside machine may be installed in the vicinity of the traffic sign to detect the operation of a vehicle traveling on a road near the installation location. However, since traffic rules are violated even in places where traffic signs are not installed, it is not always necessary to install roadside units near traffic signs. Violation of traffic rules to be regarded as dangerous acts may be violations of arbitrary traffic rules. For example, in addition to temporary suspension, violations may be made against entry prohibition (including right / left turn prohibition), speed restriction, lane change prohibition, overtaking prohibition, height restriction, weight restriction, and the like.

  The determination of whether or not the vehicle is performing a dangerous act can be typically performed by image capturing and image processing by a camera, but the determination may be performed by other methods. For example, the determination may be made on the basis of information obtained from a speed sensor (Doppler sensor) or other sensors in accordance with the dangerous action to be detected.

  Regardless of how dangerous acts are defined, the risk level information can be defined as the ratio of the number of vehicles that have performed dangerous actions to the number of vehicles detected by the roadside machine (dangerous action ratio). Alternatively, the risk level information may be defined as information indicating whether or not the road near the installation location of the roadside machine is a dangerous location. In this case, it is necessary to have a determination unit that stores the dangerous action ratio and determines whether or not the vicinity of the installation place of the roadside machine is a dangerous place based on the dangerous action ratio.

DESCRIPTION OF SYMBOLS 100 Roadside machine 110 Camera 120 Temporary stop ignore vehicle detection part 130 Measurement result notification part 200 Server apparatus 210 Database update part 220 Pause vehicle number database 230 Risk information transmission part 300 Vehicle 310 Vehicle-mounted terminal 320 Route search part 330 Temporary stop sign specification Part 340 Risk information request part 350 Notification part

Claims (11)

A danger location notification system for reporting a danger location to a vehicle occupant,
Vehicle motion detection means provided near the road for detecting the motion of the vehicle;
Dangerous action determination means for determining whether or not the operation of the vehicle detected by the vehicle movement detection means is a dangerous action;
Storage means for storing a dangerous act ratio, which is a ratio of a vehicle that has performed a dangerous action in the number of vehicles traveling on a road near the installation location of the vehicle operation detecting means;
Transmission means for transmitting risk information relating to the installation location of the vehicle operation detection means to the vehicle, the risk information determined based on the dangerous action ratio stored in the storage means;
Based on the risk information transmitted from the transmission means, informing means for informing the vehicle occupant of the dangerous location;
Hazardous location notification system. The risk information includes the dangerous act ratio,
The informing means informs the vehicle occupant of the dangerous location when the dangerous act ratio at the installation location of the vehicle motion detecting means is a predetermined threshold value or more.
The dangerous part notification system according to claim 1. Based on the dangerous act ratio, the vehicle operation detecting means further comprises a dangerous location determination means for determining whether the installation location is a dangerous location,
The risk information includes information indicating whether or not the installation location of the vehicle motion detection means is a danger location,
The notification means, when receiving the risk information indicating that the installation location of the vehicle operation detection means is a dangerous location, to notify the passenger of the vehicle of the dangerous location,
The dangerous part notification system according to claim 1. The dangerous behavior is at least one of traffic rule violation, sudden acceleration / deceleration, sudden turning,
The dangerous location notification system according to any one of claims 1 to 3. The vehicle motion detection means is an imaging means for photographing a vehicle,
The dangerous action determination means determines whether or not the detected operation of the vehicle is a dangerous action by performing image processing on an image taken by the imaging means.
The dangerous location notification system according to any one of claims 1 to 4. The vehicle motion detection means is installed near a traffic sign,
The dangerous action is an action that violates a traffic rule indicated by the traffic sign.
The dangerous part notification system according to claim 5. A roadside machine having the vehicle motion detection means and the dangerous action determination means;
A server device having the storage means and the transmission means;
A vehicle having the notification means;
It is a danger location information system in any one of Claims 1-6 comprised from these,
The roadside machine further includes notification means for notifying the server device of the number of vehicles detected by the vehicle motion detection means and the number of vehicles determined by the dangerous action determination means to be dangerous actions,
The server device includes an updating unit that updates the storage unit based on information notified from the notification unit of the roadside machine.
Dangerous location notification system. The vehicle further includes request means for requesting the server device for risk information about the installation location of the roadside machine,
In response to a request from the vehicle, the transmission unit of the server device transmits risk information about the requested installation location of the roadside machine,
The vehicle notification means notifies the occupant that the installation location of the roadside machine is a dangerous location based on the received risk information.
The dangerous part notification system according to claim 7. The transmission means of the server device transmits risk information about the installation locations of a plurality of roadside machines to the vehicle,
The vehicle notification means determines whether there is a roadside machine installation location that is a dangerous location near the position of the vehicle based on the risk information, and if there is a danger location, installation of the roadside machine is determined. Notify the passenger that the location is a dangerous location,
The dangerous part notification system according to claim 7. A roadside machine having the vehicle motion detection means, the dangerous action determination means, the storage means, and the transmission means;
A vehicle having the notification means;
It is a danger location information system in any one of Claims 1-6 comprised from these,
The transmission means of the roadside machine transmits risk information of the installation location of the roadside machine to the vehicle by road-to-vehicle communication.
Dangerous location notification system. A danger location notification method in a danger location notification system for reporting a danger location to a vehicle occupant,
A vehicle motion detection step of monitoring a predetermined location on the road and detecting the motion of the vehicle;
A dangerous action determination step for determining whether or not the vehicle movement detected in the vehicle movement detection step is a dangerous action;
A storage step of storing a dangerous act ratio that is a ratio of a vehicle that has performed a dangerous action in the number of vehicles traveling in the predetermined place;
A transmission step for transmitting to the vehicle risk level information relating to the predetermined portion, the risk level information determined based on the dangerous action ratio stored in the storage step;
Based on the risk information transmitted in the transmission step, a notification step of notifying a vehicle occupant of a dangerous location;
Risk location notification method including

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