Safe driving support system and safe driving support method

Abstract

To provide a safe driving support system capable of alerting a driver so that the driver can grasp a situation of a caution-needed spot beforehand.SOLUTION: In a safe driving support system, a data center 200 is connected to a plurality of vehicles via a communication network. The data center 200 stores a position of a first vehicle 101 of which a G sensor detects that behavior of the vehicle has been disturbed when caution information is received from the first vehicle 101 as a caution-needed spot in a storage device. The data center 200 transmits data on a caution video extracted from data on videos in a predetermined period before the caution information has been received out of data on videos captured by a drive recorder of the first vehicle 101 to a second vehicle 102 approaching the caution-needed spot when the caution information is received. A display of the second vehicle 102 having received the data on the caution video issues an alert by displaying the caution video before the second vehicle 102 arrives at the caution-needed spot.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a safe driving support system and a safe driving support method. [Background technology]

[0002] Patent Document 1 discloses a navigation device. When a pre-registered caution point exists on the route to the destination, the navigation device supports safe driving by notifying the driver that the vehicle will soon pass through the caution point. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-329713 A Summary of the Invention [Problem to be solved by the invention]

[0004] If the situation of the caution points is known in advance, the driver can take preventive driving measures in advance. However, if the driver is only notified that he or she will be passing through the caution points, the driver cannot fully understand the situation of the caution points in advance. [Means for solving the problem]

[0005] The means for solving the above problems and their effects will be described below. The safe driving support system for solving the above problem is a safe driving support system in which a data center having a storage device and a processing device, and a plurality of vehicles having a detection device capable of detecting erratic behavior of the vehicle, a photographing device capable of photographing an image in front of the vehicle, a navigation device, and a display device capable of displaying the image are connected via a communication network. In this safe driving support system, the processing device receives position information of the plurality of vehicles from the navigation device of the plurality of vehicles. The processing device receives image data photographed by the photographing device of the plurality of vehicles and stores the image in the storage device. The processing device specifies the position of the first vehicle when warning information is received from a first vehicle of the plurality of vehicles that the detection device has detected as having erratic behavior of the vehicle, from the position information of the first vehicle, and stores the position in the storage device as a warning point. When the processing device receives the warning information, it stores in the storage device warning image data of the warning point extracted from the image data for a certain period before the warning information is received from the image data photographed by the photographing device of the first vehicle stored in the storage device. The processing device transmits the data of the warning image stored in the storage device to a second vehicle among the plurality of vehicles that approaches the warning point stored in the storage device. The display device of the second vehicle that receives the data of the warning image displays the warning image to alert the second vehicle before the second vehicle arrives at the warning point.

[0006] A safe driving support method for solving the above problem is a safe driving support method in a safe driving support system in which a data center including a storage device and a processing device, and a plurality of vehicles including a detection device capable of detecting erratic behavior of the vehicle, an imaging device capable of capturing an image in front of the vehicle, a navigation device, and a display device capable of displaying the image are connected via a communication network. This safe driving support method includes a first step in which the processing device receives position information of the plurality of vehicles from the navigation devices of the plurality of vehicles. This safe driving support method includes a second step in which the processing device receives data of images captured by the imaging devices of the plurality of vehicles and stores the data in the storage device. This safe driving support method includes a third step in which the processing device specifies the position of the first vehicle when warning information is received from a first vehicle of the plurality of vehicles that the detection device has detected as having erratic behavior of the vehicle, from the position information of the first vehicle, and stores the position in the storage device as a warning point. This safe driving support method includes a fourth step of storing in the storage device, when the processing device receives the warning information, warning video data of the warning point extracted from the video data captured by the imaging device of the first vehicle stored in the storage device during a certain period before the warning information is received.This safe driving support method includes a fifth step of transmitting the warning video data stored in the storage device to a second vehicle approaching the warning point stored in the storage device among the multiple vehicles.This safe driving support method includes a sixth step of calling the attention of the second vehicle by displaying the warning video before the second vehicle reaches the warning point. Effect of the Invention

[0007] The safe driving support system and the safe driving support method can warn the driver so that the driver can grasp the situation of the caution points in advance, thereby enabling the driver to grasp the situation of the caution points in advance and perform appropriate preventive driving. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a configuration of a safe driving support system according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing an example of an image captured by a drive recorder in the safe driving support system according to the embodiment. [Diagram 3] FIG. 3 is a sequence diagram showing a flow of processing in the data center, the first vehicle, and the second vehicle in the safe driving support system of the embodiment. [Figure 4] FIG. 4 is a flowchart showing a flow of processing executed by the vehicle navigation device in the safe driving support system of the embodiment. [Diagram 5] FIG. 5 is a flowchart showing a flow of processing periodically executed by the data center in the safe driving support system according to the embodiment. [Figure 6] FIG. 6 is a flowchart showing a flow of a process executed by the data center in the safe driving support system according to the embodiment when the vehicle passes through each caution point. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a safe driving support system will be described with reference to Figs. <Configuration of safe driving support system 10> As shown in Fig. 1, the safe driving support system 10 includes a plurality of vehicles 100 and a data center 200. The data center 200 is communicatively connected to the plurality of vehicles 100 via a communication network 300. Each vehicle 100 includes a drive recorder 110 as an example of an imaging device, and a navigation device 120.

[0010] Fig. 2 shows an example of an image captured by the drive recorder 110. As shown in Fig. 2, the drive recorder 110 captures and records an image of the front of the vehicle 100 visible from the driver's seat. The drive recorder 110 is equipped with a G sensor 130. The G sensor 130 measures the magnitude of the acceleration or deceleration of the vehicle 100, and detects that the behavior of the vehicle 100 has become unstable based on the magnitude of the measured acceleration or deceleration.

[0011] The navigation device 120 is configured to include a receiver for a satellite positioning system, a communication device, a display 140 as an example of a display device capable of displaying images, and a storage device that stores data such as map information.

[0012] The drive recorder 110 and the navigation device 120 are connected so as to be able to exchange information with each other. The drive recorder 110 stores in a storage device data of the captured video, information on the date and time when the video was captured, and information on the location where the video was captured.

[0013] The data center 200 includes a communication device 230. The communication device 230 is implemented as hardware such as a network adapter, various communication software, or a combination of these. The communication device 230 is configured to realize wired or wireless communication via a communication network 300. The data center 200 may be configured using a plurality of computers. For example, the data center 200 may be configured by a plurality of server devices.

[0014] The points where it may be possible to detect that the behavior of the vehicle 100 has become unstable may be points where the driver needs to be careful, such as a point where there is a fallen object on the road as shown in Fig. 2, a point where a broken-down vehicle is stopped, a branch point on a highway, and a point where there is a signboard that draws attention. If the situation of such points of caution is known in advance, the driver can perform preventive driving in advance.

[0015] The safe driving support system 10 displays images of each caution point captured by the drive recorder 110 of the vehicles 100 behaving erratically on the display 140 of the vehicle 100 approaching each caution point before the vehicles 100 approach each caution point. In this way, the safe driving support system 10 alerts the driver of the vehicle 100 approaching each caution point.

[0016] More specifically, in the safe driving support system 10, the data center 200 receives position information from a plurality of vehicles 100. The data center 200 receives video data captured by the drive recorder 110 of the plurality of vehicles 100 and stores it in the storage device 220. The data center 200 receives warning information from a first vehicle 101 among the plurality of vehicles 100. The first vehicle 101 is a vehicle 100 among the plurality of vehicles 100 in which the G sensor 130 detects that the behavior of the vehicle 100 has become erratic. When the data center 200 receives the warning information, it specifies the position of the first vehicle 101 from the received position information, and registers the position as a warning point by storing it in the storage device 220. When the data center 200 receives the warning information, it extracts video data of the warning point from video data captured by the drive recorder 110 of the first vehicle 101 stored in the storage device 220 for a certain period before receiving the warning information. The data center 200 stores the extracted video data of the attention point as attention video data in the storage device 220. The data center 200 transmits the attention video data stored in the storage device 220 to a second vehicle 102 of the multiple vehicles 100. The second vehicle 102 is a vehicle approaching the attention point stored in the storage device 220. The display 140 of the second vehicle 102 that has received the attention video data calls attention by displaying the attention video before the second vehicle 102 reaches the attention point.

[0017] <Transmission and reception of video data in safe driving support system 10> Next, transmission and reception of video data between the data center 200 and the first vehicle 101 and second vehicle 102 will be described with reference to FIG.

[0018] 3, in the safe driving support system 10, the data center 200 receives video data from the vehicle 100. In the safe driving support system 10, the data center 200 transmits, to the second vehicle 102, data of the caution video extracted from the video data captured by the drive recorder 110 of the first vehicle 101. In this way, the safe driving support system 10 can provide the second vehicle 102 with the data of the caution video captured by the drive recorder 110 of the first vehicle 101.

[0019] As shown in FIG. 3, the process in which the data center 200 receives video data from the vehicle 100 and the process in which the data center 200 provides the second vehicle 102 with warning video data are performed in parallel.

[0020] As shown in FIG. 3, in the process of receiving video data from the vehicle 100, the vehicle 100 periodically transmits video data captured by the drive recorder 110 and position information indicating the current position of the vehicle 100 to the data center 200 at a fixed cycle. The data center 200 that has received the video data stores the received video data in the storage device 220. As shown in the upper part of FIG. 3, the first vehicle 101 transmits warning information to the data center 200 when the G sensor 130 of the first vehicle 101 detects that the behavior of the first vehicle 101 has become erratic. The data center 200 that has received the warning information registers the position of the first vehicle 101 that can be specified from the received position information of the first vehicle 101 as a warning point by storing it in the storage device 220. The data center 200 that has received the warning information extracts video data of the registered warning point from the video data captured by the drive recorder 110 of the first vehicle 101, and stores it in the storage device 220 as warning video data.

[0021] As shown in the lower part of FIG. 3, in the process of providing warning video data to the second vehicle 102, if there is a second vehicle 102 approaching a registered warning point, the data center 200 determines that it is necessary to transmit warning video data to the second vehicle 102. The data center 200 determines whether there is a second vehicle 102 approaching a registered warning point based on the position information received from the vehicle 100. Then, if it is necessary to transmit warning video data to the second vehicle 102, the data center 200 transmits warning video data of the warning point that the second vehicle 102 is approaching to the second vehicle 102.

[0022] Hereinafter, with reference to FIGS. 4 to 6, a process flow executed in the vehicle 100 and a process flow executed in the data center 200 in order to realize the attention-calling using the above-mentioned video will be described in more detail.

[0023] <Processing Executed by the Navigation Device 120 of the Vehicle 100> 4 shows the flow of a series of processes executed in the vehicle 100. This series of processes is periodically executed at a fixed cycle by the navigation device 120 of the vehicle 100. This series of processes is executed in parallel with route guidance by the navigation device 120 using a satellite positioning system.

[0024] 4, when this series of processes is started, the navigation device 120 first transmits, in step S100, video data and location information capable of identifying the current location of the vehicle 100 to the data center 200. The video data to be transmitted is video data captured by the drive recorder 110 of the vehicle 100. The location information to be transmitted, capable of identifying the current location of the vehicle 100, is information obtained from a receiver of a satellite positioning system provided in the navigation device 120.

[0025] Next, in the process of step S110, the navigation device 120 judges whether the behavior of the vehicle 100 has become erratic. The navigation device 120 judges that the behavior of the vehicle 100 has become erratic when the G sensor 130 provided in the drive recorder 110 of the vehicle 100 detects that the behavior of the vehicle 100 has become erratic. For example, the G sensor 130 of the vehicle 100 measures the magnitude of the acceleration or deceleration of the vehicle 100, and detects that the behavior of the vehicle 100 has become erratic when the magnitude of the acceleration or deceleration per unit time exceeds a certain value. In other words, the navigation device 120 judges that the acceleration of the first vehicle 101 has suddenly changed when the magnitude of the acceleration or deceleration per unit time measured by the G sensor 130 of the vehicle 100 exceeds a certain value. In the process of step S110, if the navigation device 120 judges that the behavior of the vehicle 100 has become erratic (step S110: YES), the process proceeds to step S120.

[0026] In the process of step S120, the navigation device 120 transmits warning information to the data center 200. This process corresponds to the process of the first vehicle 101 shown in the upper part of Fig. 3. The warning information is information that can identify that the vehicle 100 is behaving erratically. In addition, the warning information may include position information that can identify the position where the vehicle 100 is behaving erratically.

[0027] After the warning information is transmitted to the data center 200 through the process of step S120 in this manner, the process proceeds to step S130. If the navigation device 120 does not determine in the process of step S110 that the behavior of the vehicle 100 has become erratic (step S110: NO), the navigation device 120 executes the process of step S130 without executing the process of step S120.

[0028] Next, in the process of step S130, the navigation device 120 determines whether or not it has received data of a warning video from the data center 200. In the process of step S130, if it is determined that the navigation device 120 has received data of a warning video (step S130: YES), the process proceeds to step S140.

[0029] In the process of step S140, the display 140 of the navigation device 120 calls attention by displaying the attention video received from the data center 200. This process corresponds to the process of the second vehicle 102 shown in the lower part of FIG. 3. That is, the vehicle 100 may act as the first vehicle 101 that provides video data and transmits attention information, or as the second vehicle 102 that receives the data of the attention video, depending on the situation. When the attention video is a video, the navigation device 120 may adjust the playback speed of the video in accordance with the speed of the vehicle 100 when playing back the attention video, so that an image taken at a position where the vehicle 100 will pass in a few seconds is displayed on the display 140. This makes it easier for the driver of the vehicle 100 to visually grasp the situation before the vehicle 100 arrives at the attention point. When the attention video is displayed through the process of step S140 in this way, the navigation device 120 ends this series of processes.

[0030] In the process of step S130, if the navigation device 120 does not determine that it has received data of the warning video (step S130: NO), the navigation device 120 ends this series of processes without executing the process of step S140. In other words, the display 140 of the navigation device 120 ends this series of processes without issuing a warning.

[0031] <Processing Executed by the Data Center 200 at Regular Cycles> 5 shows the flow of processing that is periodically executed by the data center 200 at a fixed cycle. This series of processing is executed by the processing device 210 of the data center 200. This series of processing corresponds to the processing of the data center 200 shown in FIG.

[0032] 5, when this series of processes is started, first, in the process of step S200, the processing device 210 receives position information of the multiple vehicles 100. At this time, the position information received by the processing device 210 is the position information received from the first vehicle 101 and the second vehicle 102 in FIG.

[0033] Next, in the process of step S210, the processing device 210 stores the received video data in the storage device 220. The video data received by the processing device 210 is video data received from the first vehicle 101 and the second vehicle 102 in FIG.

[0034] Next, in the process of step S220, the processing device 210 determines whether or not warning information has been received. The warning information received by the processing device 210 is the warning information received from the first vehicle 101 in Fig. 3. In the process of step S220, when the processing device 210 determines that warning information has been received from the first vehicle 101 (step S220: YES), the process proceeds to step S230.

[0035] In the process of step S230, the processing device 210 identifies the position of the first vehicle 101 when the warning information was received, and registers the position as a warning point by storing it in the storage device 220. At this time, the processing device 210 identifies the position of the first vehicle 101 when the warning information was received, based on the position information of the first vehicle 101 received in the process of step S200.

[0036] Next, in the process of step S240, the processing device 210 executes an extraction process. The extraction process is a process of extracting the video data of the attention point registered in the process of step S230 as the attention video data from the video data stored in the storage device 220 in the process of step S210. For example, the processing device 210 extracts the attention video data from the video data for a certain period before receiving the attention information, among the video data stored in the storage device 220 in the process of step S210. It is preferable that the processing device 210 adopts the video data in which the situation of the attention point is easier to understand as the attention video data. For example, the extraction process may be a process in which the processing device 210 shows the video for a certain period before receiving the attention information to the operator and has the operator extract a part of it as the attention video. For example, the extraction process may be a process in which the processing device 210 analyzes the data of the attention video for a certain period before receiving the attention information by AI and extracts the data of the attention video. In addition, the processing device 210 may extract the attention video data as still image data or video data.

[0037] In the process of step S240, the processing device 210 stores the extracted caution video data in the storage device 220. By the processing device 210 executing such a process, the caution video data extracted from the video data captured by the drive recorder 110 of the first vehicle 101 before it is detected that the behavior of the first vehicle 101 has become erratic is stored in the storage device 220.

[0038] Next, in the process of step S250, the processing device 210 executes an update process. The update process is a process of evaluating the newly stored data of the attention video and updating the data of the attention video to be provided to the second vehicle 102. The processing device 210 compares the data of the attention video of the same attention point already stored in the storage device 220 as the data of the attention video to be provided to the second vehicle 102 with the newly stored data of the attention video. The processing device 210 updates the data of the attention video to be provided to the second vehicle 102 according to the result of comparing these data of the attention video. It is preferable that the processing device 210 adopts the data of the video in which the situation of the attention point is more clearly captured. Therefore, for example, the processing device 210 selects the data in which the situation of the attention point is more clearly captured as the data of the attention video to be provided to the second vehicle 102. It is preferable that the processing device 210 adopts the new data of the attention video. Therefore, for example, the processing device 210 selects the newer data as the data of the attention video to be provided to the second vehicle 102.

[0039] The update process may be executed after a plurality of pieces of attention video data for the same attention point are accumulated in the storage device 220. In this case, the processing device 210 selects one piece of attention video data from the plurality of pieces of attention video data for the same attention point, and updates the attention video data to be transmitted to the second vehicle 102. For example, the update process may be a process in which the processing device 210 shows the attention video data accumulated in the storage device 220 to an operator and has the operator select one piece of attention video data. For example, the update process may be a process in which the processing device 210 analyzes the attention video data by AI and has the operator select the attention video data based on the result.

[0040] After executing the update process of step S250 and storing the data of the warning video in the storage device 220, the process proceeds to step S260. Furthermore, if the processing device 210 does not determine in the process of step S220 that warning information has been received from the first vehicle 101 (step S220: NO), the processing device 210 does not execute the processes of steps S230 to S250. In this case, the processing device 210 executes the process of step S260 without executing the processes of steps S230 to S250.

[0041] Next, in the process of step S260, the processing device 210 judges whether or not there is a second vehicle 102 approaching the attention point stored in the storage device 220. At this time, the processing device 210 judges whether or not there is a second vehicle 102 approaching the attention point for each attention point stored in the storage device 220. The processing device 210 specifies the position of the second vehicle 102 based on the position information received in the process of step S200, and specifies the distance between the specified position of the second vehicle 102 and each attention point stored in the storage device 220. For example, when the distance between the position of the second vehicle 102 and the attention point stored in the storage device 220 is less than a certain distance, the processing device 210 judges that there is a second vehicle 102 approaching the attention point. When the processing device 210 judges that there is a second vehicle 102 approaching the attention point (step S260: YES), the process proceeds to step S270.

[0042] Next, in the processing of step S270, the processing device 210 selects warning video data to be transmitted to the second vehicle 102 by searching for warning video data of the warning point where the second vehicle 102 is approaching from among the multiple warning video data stored in the storage device 220.

[0043] Next, in the process of step S280, the processing device 210 transmits data of the warning image to the second vehicle 102 approaching the warning point. The data of the warning image to be transmitted to the second vehicle 102 is the data of the warning image selected in the process of step S270. Since the processing device 210 transmits the data of the warning image to the second vehicle 102 approaching the warning point, the timing when the second vehicle 102 receives the data of the warning image is the timing before the second vehicle 102 reaches the warning point. Therefore, in the process of step S140 of FIG. 4, the display 140 of the second vehicle 102 displays the warning image when it receives the data of the warning image, thereby calling attention to the second vehicle 102 before it reaches the warning point. When the data of the warning image is transmitted to the second vehicle 102 through the process of step S280 in this way, the processing device 210 ends this series of processes.

[0044] In the process of step S260, if the processing device 210 does not determine that there is a second vehicle 102 approaching the caution point (step S260: NO), the processing device 210 does not execute the process of step S270 and the process of step S280. At this time, the processing device 210 ends this series of processes without executing the process of step S270 and the process of step S280. In other words, if there is no second vehicle 102 approaching the caution point, the processing device 210 ends this series of processes without transmitting caution video data to the second vehicle 102.

[0045] <Processing Executed by Data Center 200 When Vehicle 100 Passes Each Caution Point> 6 shows the flow of processing executed by the data center 200 when the vehicle 100 passes through each registered caution point. This series of processing is executed by the processing device 210 of the data center 200. This series of processing corresponds to the processing of the data center 200 shown in FIG.

[0046] 6, when this series of processes is started, the processing device 210 first counts the number of vehicles 100 that have passed through a caution point without transmitting caution information to the data center 200 in the process of step S300. The processing device 210 counts the number of vehicles 100 that have passed through each caution point without transmitting caution information for each caution point stored in the storage device 220, based on the position information received from the multiple vehicles 100 and whether or not caution information has been received. The processing device 210 stores the counted number of vehicles 100 in the storage device 220.

[0047] Next, in step S310, the processing device 210 determines for each attention point stored in the storage device 220 whether the number of vehicles 100 that passed the attention point without transmitting attention information is equal to or greater than a certain number. At this time, the processing device 210 determines whether the number of vehicles 100 that passed the attention point without transmitting attention information is equal to or greater than a certain number based on the number of vehicles 100 stored in the storage device 220 in the processing of step S300. When the processing device 210 determines that the number of vehicles 100 that passed the attention point without transmitting attention information is equal to or greater than a certain number for each attention point stored in the storage device 220 (step S310: YES), the processing proceeds to step S320.

[0048] Next, in the process of step S320, the processing device 210 deletes the information of the attention point stored in the storage device 220 for the attention point where the number of vehicles 100 that passed the attention point without transmitting the attention information is equal to or greater than a certain number. Specifically, the processing device 210 deletes the attention point where the number of vehicles 100 that passed the attention point without transmitting the attention information is equal to or greater than a certain number from among the attention points stored in the storage device 220 in the process of step S230 shown in FIG. 5. In other words, the processing device 210 deletes the attention point where the number of vehicles 100 that passed the attention point without transmitting the attention information is equal to or greater than a certain number from among the registered attention points. Furthermore, if the data of the attention video of the deleted attention point is stored in the storage device 220, the processing device 210 deletes the data of the attention video of the deleted attention point. In this way, when the information of the attention point where the number of vehicles 100 that passed the attention point without transmitting the attention information is equal to or greater than a certain number through the process of step S320 is deleted, the processing device 210 ends this series of processes.

[0049] In the process of step S310, if the processing device 210 does not determine that the number of vehicles 100 that have passed the attention point without transmitting attention information is equal to or greater than a certain number (step S310: NO), the processing device 210 does not execute the process of step S320. In this case, the processing device 210 ends this series of processes without executing the process of step S320. In other words, for each attention point stored in the storage device 220, if the number of vehicles 100 that have passed the attention point without transmitting attention information is not equal to or greater than a certain number, the processing device 210 ends this series of processes without deleting the information of that attention point.

[0050] <Operation of the embodiment> In the safe driving support system 10, the processing device 210 of the data center 200 receives position information of the multiple vehicles 100 from the navigation devices 120 of the multiple vehicles 100 through the processing of step S200 in the series of processing described with reference to Fig. 5. This processing described with reference to Fig. 5 is the first step in the safe driving support method by the safe driving support system 10.

[0051] Then, through the process of step S210 in the series of processes described with reference to Fig. 5, the processing device 210 receives data of images captured by the drive recorders 110 of the multiple vehicles 100 and stores it in the storage device 220. This process described with reference to Fig. 5 is a second step in the safe driving support method by the safe driving support system 10.

[0052] Then, the processing device 210 specifies the position of the first vehicle 101 when the warning information was received from the first vehicle 101 from the position information of the first vehicle 101 through the process of step S230 in the series of processes described with reference to Fig. 5. The first vehicle 101 is the vehicle 100 among the multiple vehicles 100 in which the G sensor 130 detected that the behavior of the vehicle 100 became erratic. The processing device 210 stores the specified position of the first vehicle 101 in the storage device 220 as a warning point. This process described with reference to Fig. 5 is a third step in the safe driving support method by the safe driving support system 10.

[0053] Then, when the processing device 210 receives the warning information through the process of step S240 in the series of processes described with reference to Fig. 5, it stores the warning video data of the warning point in the storage device 220. The warning video data is data extracted from the video data captured by the drive recorder 110 of the first vehicle 101 for a certain period before the warning information is received and stored in the storage device 220. This process described with reference to Fig. 5 is the fourth step in the safe driving support method by the safe driving support system 10.

[0054] Then, the processing device 210 transmits the data of the caution video stored in the storage device 220 to the second vehicle 102 approaching the caution point among the multiple vehicles 100 through the process of step S280 in the series of processes described with reference to Fig. 5. This process described with reference to Fig. 5 is the fifth step in the safe driving support method by the safe driving support system 10.

[0055] Then, the display 140 of the second vehicle 102 calls attention by displaying a caution video before the second vehicle 102 reaches the caution point through the process of step S140 in the series of processes described with reference to Fig. 4. This process described with reference to Fig. 4 is the sixth step in the safe driving support method by the safe driving support system 10.

[0056] In this way, the safe driving support system 10 executes a safe driving support method including a first step, a second step, a third step, a fourth step, a fifth step, and a sixth step. By executing such a safe driving support method, when the vehicle 100 behaves erratically, the safe driving support system 10 registers the position where the behavior is erratic as a caution point. Then, the safe driving support system 10 extracts caution video data from video data captured by the drive recorder 110 of the first vehicle 101 during a certain period before the behavior is erratic. Then, the safe driving support system 10 transmits the extracted caution video data to the second vehicle 102 approaching the caution point. Then, the safe driving support system 10 causes the display 140 of the second vehicle 102 that has received the caution video data to display the caution video before the second vehicle 102 reaches the caution point, thereby calling attention.

[0057] <Effects of this embodiment> (1) The safe driving support system 10 can warn the driver so that the driver can grasp the situation of the caution points in advance. This allows the driver to grasp the situation of the caution points in advance and perform appropriate preventive driving.

[0058] (2) When the display 140 of the second vehicle 102 calls attention by playing back a moving image of a caution image, the playback speed of the image is adjusted according to the speed of the second vehicle 102 so as to display an image taken at a point to be reached after a preset time. This makes it easy for the driver of the second vehicle 102 to visually grasp the situation up to the point to be reached after the preset time.

[0059] (3) The processing device 210 selects warning video data to be transmitted to the second vehicle 102 from the multiple warning video data for the same warning spot stored in the storage device 220, and updates the warning video data to be transmitted to the second vehicle 102. The safe driving support system 10 updates the warning video data, so that the situation of the warning spot can be grasped based on the appropriate warning video.

[0060] (4) The processing device 210 deletes the information of the attention point stored in the storage device 220 when the number of vehicles 100 that have passed the attention point without transmitting the attention information to the data center 200 reaches or exceeds a certain number. That is, the processing device 210 deletes the information of the attention point when the number of vehicles 100 that have passed the attention point without disrupting their behavior reaches or exceeds a certain number. When the number of vehicles 100 that have passed the attention point without disrupting their behavior reaches or exceeds a certain number, it is highly likely that the situation at the attention point has changed to a safe situation. At this time, by the processing device 210 deleting the information of the attention point, even if there is a second vehicle 102 approaching the attention point whose information has been deleted, the attention video is no longer transmitted to the second vehicle 102. Therefore, it is possible to prevent the attention from being continuously issued even when the situation at the attention point is a safe situation.

[0061] (6) In the above navigation method, when the vehicle 100 behaves erratically, the location where the behavior is erratic is registered as a caution point, and caution video data is extracted from video data captured by the drive recorder 110 of the first vehicle 101 during a certain period before the behavior is erratic. The extracted caution video data is then transmitted to the second vehicle 102 approaching the caution point. The display 140 of the second vehicle 102 that has received the caution video data displays the caution video to call attention before the second vehicle 102 reaches the caution point. Therefore, the above navigation method can call attention so that the driver can grasp the situation of the caution point in advance. This allows the driver to grasp the situation of the caution point in advance and perform appropriate preventive driving.

[0062] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

[0063] From the multiple vehicles 100, data of images captured by a drive recorder 110, which is an example of an imaging device, is transmitted to the data center 200. In response to this, for example, a configuration may be adopted in which the navigation device 120, when started, asks the driver whether or not to permit the transmission of the image data, and transmits the image data if the driver permits it.

[0064] The multiple vehicles 100 may behave as a first vehicle 101 or as a second vehicle 102. In contrast, some of the vehicles 100 may only be provided with warning images, i.e., may be vehicles 100 that only behave as second vehicles 102. In this case, the vehicles 100 that only be provided with warning images may not be equipped with a drive recorder 110.

[0065] Among the multiple vehicles 100, there may be a vehicle that only provides video. In the above-described safe driving support system 10, the warning image is displayed on the display 140 provided in the navigation device 120 of the second vehicle 102. However, the warning image may be displayed in the second vehicle 102 on a display device other than the display 140 provided in the navigation device 120. One example of a display device other than the display 140 provided in the navigation device 120 is a head-up display that displays an image on the windshield.

[0066] When a warning image is being displayed on the display 140 of the second vehicle 102, the navigation device 120 may output a sound that can identify that a warning image is being displayed.

[0067] In the above-described safe driving support system 10, the detection device that detects that the behavior of the vehicle 100 has become erratic is the G sensor 130. In contrast, the detection device that detects that the behavior of the vehicle 100 has become erratic may be a device different from the G sensor 130. As an example, the detection device may be a steering angle sensor that measures the amount of displacement of the steering angle provided in the vehicle 100. As an example, the detection device may be a pedal stroke sensor that measures the amount of displacement of the brake pedal provided in the vehicle 100. In addition, when a steering angle sensor or a pedal stroke sensor is adopted as the detection device, it is preferable to detect that the behavior of the vehicle 100 has become erratic when the magnitude of the displacement amount per unit time exceeds a certain value. In other words, it is preferable to transmit warning information from the first vehicle 101 to the data center 200 when the magnitude of the displacement amount per unit time exceeds a certain value. In addition, the detection device may be configured by combining some or all of the sensors among the G sensor 130, the steering angle sensor, and the pedal stroke sensor.

[0068] The processing device 210 of the data center 200 transmits data of a warning image to a second vehicle 102 approaching an attention point stored in the storage device 220, among the multiple vehicles 100. In response to this, the processing device 210 of the data center 200 may determine whether or not an attention point is included on a route to a destination when the navigation device 120 of the vehicle 100 provides route guidance. In addition, when an attention point is included on a route guided by the navigation device 120 of the vehicle 100, the processing device 210 may determine in the process of step S260 in FIG. 5 that there is a second vehicle 102 approaching the attention point. As a result, the processing device 210 may transmit data of a warning image to a second vehicle 102, among the multiple vehicles 100, that includes an attention point on a route guided by the navigation device 120.

[0069] In the above-described safe driving support system 10, the images transmitted from the multiple vehicles 100 to the data center 200 are images captured by the drive recorder 110. In contrast, the images transmitted from the multiple vehicles 100 to the data center 200 may be images captured by a capturing device different from the drive recorder 110. One example of a capturing device different from the drive recorder 110 is an in-vehicle camera used for driving support.

[0070] The processing device 210 counts the number of vehicles 100 that pass a caution point without disrupting their behavior, and when the counted number of vehicles 100 reaches a certain number or more, deletes the information of the caution point. Alternatively, for example, the processing device 210 may count the ratio of the number of vehicles 100 that pass each caution point without transmitting caution information to the data center to the total number of vehicles 100 that pass each caution point every certain period. Then, when the counted ratio falls below a certain ratio, the information of the caution point stored in the storage device 220 may be deleted.

[0071] The order of the steps included in the above-mentioned safe driving support method is not limited. The order of the steps may be changed as long as the above-mentioned safe driving support method can be realized. For example, the processing device 210 may execute the above-mentioned second step before executing the above-mentioned first step. [Explanation of symbols]

[0072] Reference Signs List 10...Safety driving support system, 100...Vehicle, 101...First vehicle, 102...Second vehicle, 110...Driving recorder, 120...Navigation device, 130...G sensor, 140...Display, 200...Data center, 210...Processing device, 220...Storage device, 230...Communication device, 300...Communication network

Claims

1. a data center including a storage device and a processing device; A plurality of vehicles each equipped with a detection device capable of detecting a disturbance in the behavior of the vehicle, an image capturing device capable of capturing an image in front of the vehicle, a navigation device, and a display device capable of displaying the image; is a safe driving support system connected via a communication network, The processing device comprises: receiving location information of the plurality of vehicles from the navigation devices of the plurality of vehicles; receiving data of images captured by the image capturing devices of the plurality of vehicles and storing the data in the storage device; identifying a position of a first vehicle among the plurality of vehicles when warning information is received from the first vehicle that the detection device has detected as having an irregular behavior of the first vehicle, from position information of the first vehicle, and storing the position in the storage device as a warning point; When the warning information is received, storing in the storage device warning image data of the warning point extracted from the image data captured by the image capture device of the first vehicle during a certain period before the warning information is received; and transmitting the data of the warning image stored in the storage device to a second vehicle approaching the warning point stored in the storage device among the plurality of vehicles; The display device of the second vehicle that has received the data of the warning image displays the warning image to call the attention of the second vehicle before the second vehicle reaches the warning point. Safe driving support system.

2. When the display device of the second vehicle issues the warning by playing back the moving image of the warning image, the display device adjusts the playback speed of the warning image in accordance with the speed of the second vehicle so as to display an image captured at a point where the second vehicle will arrive after a predetermined time. The safe driving support system according to claim 1 .

3. The processing device comprises: storing in the storage device a plurality of pieces of data of the attention images for the same attention point identified from position information received from the navigation devices of the plurality of first vehicles; and selecting the warning image data to be transmitted to the second vehicle from the plurality of warning image data for the same warning point stored in the storage device, and updating the warning image data to be transmitted to the second vehicle. The safe driving support system according to claim 1 .

4. The processing device comprises: The number of vehicles that have passed the warning point without transmitting the warning information to the data center is counted, and information on the warning point where the counted number exceeds a certain number is deleted from the storage device. The safe driving support system according to claim 3.

5. a data center including a storage device and a processing device; A plurality of vehicles each equipped with a detection device capable of detecting a disturbance in the behavior of the vehicle, an image capturing device capable of capturing an image in front of the vehicle, a navigation device, and a display device capable of displaying the image; A safe driving support method in a safe driving support system connected via a communication network, a first step of the processing device receiving location information of the plurality of vehicles from the navigation devices of the plurality of vehicles; a second step in which the processing device receives data of images captured by the image capturing devices of the plurality of vehicles and stores the data in the storage device; a third step of the processing device specifying a position of a first vehicle from among the plurality of vehicles, the first vehicle having been detected by the detection device as having an irregular behavior when warning information is received from the first vehicle from the position information of the first vehicle, and storing the position in the storage device as a warning point; a fourth step of storing, in the storage device, data of caution images of the caution point extracted from data of the images captured by the image capturing device of the first vehicle during a certain period prior to receiving the caution information, when the processing device receives the caution information; a fifth step in which the processing device transmits data of the warning image stored in the storage device to a second vehicle among the plurality of vehicles that approaches the warning point stored in the storage device; and a sixth step of causing the display device of the second vehicle to display the warning image to alert the second vehicle before the second vehicle reaches the warning point. Safe driving support methods.

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