Driving assistance systems

Abstract

The objective is to provide a driver assistance device that can provide further driver support using information on the driver attributes of surrounding vehicles. [Solution] The driver assistance device 10 of this disclosure provides driver assistance for the first vehicle. The attribute communication unit 12 of the driver assistance device 10 receives second attribute information, which is attribute information of the driver of the second vehicle traveling behind the first vehicle, from a second driver assistance device that provides driver assistance for the second vehicle. The rear distance detection unit 13 detects the rear distance, which is the distance between the first vehicle and the second vehicle. The notification unit 14 notifies the driver of the first vehicle that the second vehicle is a dangerous vehicle if the second attribute information satisfies predetermined conditions and the rear distance is less than a first threshold.

Description

Technical Field

[0004] ,

[0006] , , , , , ,

[0005] , , ,<000001​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The system includes a notification unit that, if the second attribute information satisfies predetermined conditions and the following distance is less than a first threshold, notifies the driver of the first vehicle that the second vehicle is a dangerous vehicle. Driving assistance system. [Effects of the Invention]

[0007] This disclosure provides a driver assistance device that can provide further driver assistance to the driver using information on the driver attributes of surrounding vehicles. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram of a system showing an example of the configuration of the driver assistance system 1 according to the first embodiment. [Figure 2] This is a block diagram showing an example of the configuration of the driver assistance system 1 according to the first embodiment. [Figure 3] This is a flowchart illustrating an example of a first operation in the driver assistance system 1 according to the first embodiment. [Figure 4] This flowchart shows an example of a second operation in the driver assistance system 1 according to the first embodiment. [Figure 5] This flowchart shows an example of a second operation in the driver assistance system 1 according to the first embodiment. [Figure 6] This is a schematic diagram of a system showing an example of the configuration of the driver assistance system 2 according to the second embodiment. [Figure 7] This is a block diagram showing an example of the configuration of the driver assistance system 2 according to the second embodiment. [Figure 8] This is a flowchart illustrating an example of the operation of the driver assistance system 2 according to the second embodiment. [Modes for carrying out the invention]

[0009] Embodiments of the present disclosure will be described in detail below with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant explanations will be omitted where necessary for clarity.

[0010] (First embodiment) First, an example of the configuration of the driver assistance system 1 according to the first embodiment will be described using Figures 1 and 2.

[0011] Figure 1 is a schematic diagram showing an example of the configuration of the driver assistance system 1 according to the first embodiment. Figure 2 is a block diagram showing an example of the configuration of the driver assistance system 1 according to the first embodiment.

[0012] As shown in Figures 1 and 2, the driver assistance system 1 is used in situations where there is a first vehicle and a second vehicle traveling behind the first vehicle.

[0013] The driver assistance system 1 comprises a driver assistance device 10, a camera 101, a sensor 102, a touch panel 103, a display 104, and a speaker 105. The driver assistance device 10, camera 101, sensor 102, touch panel 103, display 104, and speaker 105 are mounted on the first vehicle. However, the driver assistance device 10 may not be mounted on the first vehicle, but may be implemented on a device such as a server located outside the first vehicle. Multiple units of each of the camera 101, sensor 102, touch panel 103, display 104, and speaker 105 may be mounted on the first vehicle.

[0014] The driver assistance device 10 is, for example, a computer, which provides driver assistance for the first vehicle. Camera 101 will be installed near the driver's seat of the first vehicle. Camera 101 will capture images of the driver's face and other details of the first vehicle. Sensor 102 is, for example, a LiDAR. Sensor 102 is installed facing the surroundings of the first vehicle. Sensor 102 detects, for example, the inter-vehicle distance from the first vehicle to a vehicle traveling around the first vehicle such as a second vehicle. Sensor 102 may be composed of a camera that captures an image including the vehicles traveling around the first vehicle, and an analysis unit that analyzes the inter-vehicle distance between the first vehicle and the vehicles traveling around from the image.

[0015] Touch panel 103 is installed near the driver's seat of the first vehicle. Touch panel 103 receives input of information from the driver of the first vehicle. Display 104 is installed near the driver's seat of the first vehicle.Display 104 displays information to the driver of the first vehicle. Speaker 105 is installed near the driver's seat of the first vehicle.Speaker 105 outputs information to the driver of the first vehicle as sound.

[0016] In addition, the driving support system 1 includes a driving support device 20, a camera 201, a touch panel 203, a display 204, and a speaker 205. The driving support device 20, the camera 201, the touch panel 203, the display 204, and the speaker 205 are mounted on the second vehicle. Note that the camera 201, the touch panel 203, the display 204, and the speaker 205 may each be mounted in plurality on the second vehicle.

[0017] The driving support device 20 is, for example, a computer and is a device that performs driving support for the second vehicle. Note that the driving support device 20 may be realized by a device such as a server outside the second vehicle, for example, without being mounted on the second vehicle. The camera 201, the touch panel 203, the display 204, and the speaker 205 each have the same functions as the camera 101, the touch panel 103, the display 104, and the speaker 105.

[0018] The driver assistance device 10 communicates wirelessly with the driver assistance device 20. The driver assistance device 10 may also communicate with the driver assistance device 20 via a server 500, for example, built on the cloud. Furthermore, the driver assistance device 10 communicates wirelessly or via wired connection with the camera 101, sensor 102, touch panel 103, display 104, and speaker 105. Similarly, the driver assistance device 20 communicates wirelessly or via wired connection with the camera 201, touch panel 203, display 204, and speaker 205.

[0019] Next, we will describe the specific configurations of the driver assistance devices 10 and 20 of the driver assistance system 1 according to the first embodiment.

[0020] The driver assistance device 10 includes an attribute acquisition unit 11, an attribute communication unit 12, a rear distance detection unit 13, a notification unit 14, and a surrounding environment information acquisition unit 15. The driver assistance device 20 also includes an attribute acquisition unit 21 and an attribute communication unit 22.

[0021] <First Structure> First, let's describe the first configuration of the driver assistance system 1. The attribute acquisition unit 21 of the driver assistance device 20 acquires attribute information of the driver of the second vehicle (hereinafter referred to as second attribute information). The attribute acquisition unit 21 acquires the second attribute information before the driver starts the second vehicle or when the driver is driving the second vehicle.

[0022] The second attribute information includes, for example, information on the driver's driving experience and / or age of the second vehicle. Driving experience and age are expressed quantitatively. Driving experience is, for example, the number of years since obtaining a driver's license or the number of years since driving a vehicle on a daily basis. Driving experience may be divided into multiple levels, such as 1, 2, ..., n (where n is a natural number), depending on the number of years since obtaining a driver's license or the number of years since driving a vehicle on a daily basis. A lower level of driving experience indicates less driving experience. Level 1 is, for example, when the driving experience is less than one year. Level 2 is when the driving experience is one year or more but less than two years. Also, if n=10, drivers with driving experience levels 1-3 are classified as novice drivers. Drivers with driving experience levels 4-7 are classified as intermediate drivers. Drivers with driving experience levels 8-10 are classified as advanced drivers. Age is expressed as m (where m is a natural number) years old. Age may be categorized into multiple levels, such as young drivers, middle-aged drivers, and elderly drivers. Driving experience and age are defined similarly in the following explanation.

[0023] The attribute acquisition unit 21 acquires images from the camera 201, including the driver's face and body. The attribute acquisition unit 21 extracts the driver's behavior from the images including the driver's body and estimates the driver's driving experience based on the driver's behavior. For example, the attribute acquisition unit 21 estimates that the driver has little driving experience if the driver is restless while driving or if the driver moves their eyes too much. The attribute acquisition unit 21 also estimates the driver's age from the images including the driver's face. For example, the attribute acquisition unit 21 estimates the driver's age using facial recognition technology. The attribute acquisition unit 21 may also acquire information about the driver's driving experience and age by reading the driver's license. Alternatively, the attribute acquisition unit 21 may acquire information manually entered by the driver on the touch panel 203 and estimate the driver's driving experience and age based on that information. The manually entered information may include, for example, the number of years since obtaining the driver's license and the date of birth. The attribute acquisition unit 21 may acquire the driver's skill level, which is a self-assessment of their driving proficiency, from the driver's touch panel and use it as attribute information. The attribute acquisition unit 21 may also acquire operational information, such as the roughness of accelerator and steering wheel operation, from the ECU (Engine Control Unit) of the second vehicle, and use the acquired information to evaluate the driver's driving skills, such as the skill level and the degree of dangerous driving, such as rough driving, as attribute information. Furthermore, if the second vehicle is a rental car, the attribute acquisition unit 21 may acquire information such as the driver's age registered from the rental car company's system.

[0024] The attribute communication unit 22 transmits the second attribute information to the driver assistance device 10, which provides driving assistance for the first vehicle traveling in front of the second vehicle. Specifically, the attribute communication unit 22 transmits to the driver assistance device 10 information in which the identification information of the second vehicle is linked to the second attribute information. The identification information of the second vehicle includes location information such as the latitude and longitude of the second vehicle, and vehicle information such as the type of vehicle and body color of the second vehicle. The attribute communication unit 22 of the driver assistance device 20 may also upload the second attribute information linked to the identification information of the second vehicle to the server 500.

[0025] The attribute communication unit 12 of the driver assistance device 10 receives second attribute information from the driver assistance device 20. Specifically, the attribute communication unit 12 identifies that the vehicle that transmitted the second attribute information is the second vehicle, based on the identification information of the second vehicle associated with the second attribute information. The attribute communication unit 12 does not necessarily need to receive the identification information of the second vehicle. If it does not receive the identification information of the second vehicle, it may determine which vehicle received the second attribute information by other means, such as estimating the direction of arrival of radio waves for vehicle-to-vehicle communication. The attribute communication unit 12 may also download the second attribute information associated with the identification information of the second vehicle from the server 500. In this case, the attribute communication unit 12 may also download the attribute information of the drivers of surrounding vehicles traveling in front of or to the side of the first vehicle, along with the second attribute information, from the server 500. Furthermore, after receiving the second attribute information from the driver assistance device 20, the attribute communication unit 12 may output the second attribute information to the driver of the first vehicle via the display 104 or speaker 105.

[0026] After the rear inter-vehicle distance detection unit 13 receives second attribute information from the driver assistance device 20 via the attribute communication unit 12, it acquires the distance between the first vehicle and the second vehicle traveling behind it (hereinafter referred to as the rear inter-vehicle distance).

[0027] The notification unit 14 determines whether the second attribute information satisfies predetermined conditions. If the second attribute information satisfies predetermined conditions, it is, for example, in at least one of the following cases (1) to (3). (1) If the driver of the second vehicle has a level of driving experience that classifies them as a novice driver (e.g., level 1, 2, or 3). (2) If the driver of the second vehicle is of an age that would classify them as a young driver (for example, between 16 and 24 years old). (3) If the driver of the second vehicle is of an age that would classify them as an elderly driver (for example, 75 years of age or older).

[0028] The notification unit 14 then determines whether the following distance is less than the threshold T1. For example, even if the second attribute information satisfies predetermined conditions, the notification unit 14 sets the following distance that the driver of the first vehicle can safely drive at as the threshold T1.

[0029] The notification unit 14 notifies the driver of the first vehicle that the second vehicle is a dangerous vehicle with a high probability of rear-ending the first vehicle if the second attribute information meets predetermined conditions and the following distance is less than threshold T1. It has been suggested that vehicle collisions caused by the driver's inattention are more likely to occur when the driver is a novice driver, young driver, or elderly driver. In other words, the notification unit 14 notifies the driver of the second vehicle as a dangerous vehicle because the driver of the second vehicle is a novice driver or the like, but is trying to close the distance with the first vehicle. For example, the notification unit 14 may, via the display 104 or speaker 105, suggest to the driver of the first vehicle that the first vehicle stop or give way to the second vehicle.

[0030] Furthermore, the notification unit 14 may change the threshold T1 according to the second attribute information. For example, the notification unit 14 changes the threshold T1 based on the driver's level of driving experience and the driver's age included in the second attribute information. Specifically, the notification unit 14 increases the sensitivity of the notification by setting the threshold T1 higher the lower the level of driving experience of the driver of the second vehicle, that is, the shorter the driving experience of the driver of the second vehicle. By doing so, if the driver of the second vehicle has a low level of driving experience, the notification unit 14 can notify the driver of the first vehicle of the risk of being rear-ended at an early stage when the distance between the vehicles is not yet very short.

[0031] <Second Structure> Next, we will explain the second configuration of the driver assistance system 1. The attribute acquisition unit 11 of the driver assistance device 10 acquires attribute information of the driver of the first vehicle (hereinafter referred to as first attribute information). The acquisition of attribute information is performed in the same way as the attribute acquisition unit 21 described above, so the details are omitted.

[0032] The attribute communication unit 12 transmits the first attribute information to the driver assistance device 20, which provides driving assistance for the second vehicle traveling behind the first vehicle. The transmission of attribute information is performed in the same way as the attribute communication unit 22 described above, so the details are omitted.

[0033] The attribute communication unit 12 may determine whether or not to transmit the first attribute information to the driver assistance device 20 based on the information acquired by the surrounding environment information acquisition unit 15. The surrounding environment information acquisition unit 15 acquires at least one of traffic information and illuminance information around the first vehicle. The traffic information includes information on the degree of congestion around the vehicle. The illuminance information includes information on the darkness around the vehicle. For example, the surrounding environment information acquisition unit 15 acquires at least one of traffic information and illuminance information around the first vehicle by connecting to a network such as the Internet or by obtaining measurement information from sensors (not shown) mounted on the first vehicle. Then, the attribute communication unit 12 determines whether or not to transmit the first attribute information to the driver assistance device 20 that assists in driving the second vehicle traveling around the first vehicle, based on at least one of the traffic information and illuminance information around the first vehicle. Specifically, the attribute communication unit 12 transmits the first attribute information to the driver assistance device 20 if the degree of congestion around the first vehicle is above a predetermined threshold, and / or if the darkness around the first vehicle is below a predetermined threshold. Accidents are more likely to occur when the area around the first vehicle is congested or when it is dark. If the driver of the first vehicle is a novice driver, transmitting this information to surrounding vehicles can be expected to result in more considerate driving, such as maintaining a longer following distance. The driver assistance device 10 limits the transmission of the first attribute information to the driver assistance device 20 to such cases, and does not provide the first attribute information to the surroundings when assistance is not needed, thereby ensuring privacy while guaranteeing psychological safety when necessary.

[0034] Subsequently, the attribute communication unit 22 outputs the first attribute information to the driver of the second vehicle via the display 204 and speaker 205. At this time, the driver of the second vehicle can learn that the driver of the first vehicle traveling ahead of their vehicle is a novice driver, a young driver, an elderly driver, etc. After that, the attribute communication unit 22 transmits information to the driver support device 10 indicating that the first attribute information has been output to the driver of the second vehicle.

[0035] The attribute communication unit 12 of the driver assistance device 10 receives information from the driver assistance device 20 indicating that it has output the first attribute information to the driver of the second vehicle. In other words, the attribute communication unit 12 receives information that it has informed the driver of the second vehicle, which is traveling behind its own vehicle, that the driver of its own vehicle is a novice driver or the like. The attribute communication unit 12 may also receive information from the driver assistance device 20 via the server 500 indicating that it has output the first attribute information to the driver of the second vehicle.

[0036] After the rear distance detection unit 13 receives information from the driver assistance device 20 indicating that it has outputted first attribute information to the driver of the second vehicle, it acquires the rear distance, which is the distance between the first vehicle and the second vehicle.

[0037] The notification unit 14 determines whether the first attribute information satisfies predetermined conditions. If the first attribute information satisfies predetermined conditions, it is, for example, in at least one of the following cases (1) to (3). (1) If the driver of the first vehicle has a level of driving experience that classifies them as a novice driver (e.g., level 1, 2, or 3). (2) If the driver of the first vehicle is of an age that would classify them as a young driver (for example, between 16 and 24 years old). (3) If the driver of the first vehicle is of an age that would classify them as an elderly driver (for example, 75 years of age or older).

[0038] Furthermore, the notification unit 14 determines whether the following distance is less than the threshold T2. For example, even if the first attribute information satisfies predetermined conditions, the notification unit 14 sets the following distance that the driver of the first vehicle can safely drive at as the threshold T2.

[0039] The notification unit 14 notifies the driver of the first vehicle that the second vehicle is a dangerous vehicle if the first attribute information satisfies predetermined conditions and the following distance is less than the threshold T2. The notification unit 14 also notifies the driver of the second vehicle as a dangerous vehicle if the driver of the second vehicle is attempting to close the distance between the first and second vehicles despite knowing that the driver of the first vehicle is a novice driver or the like. For example, the notification unit 14 may, via the display 104 or speaker 105, suggest to the driver of the first vehicle that the first vehicle stop or yield to the second vehicle.

[0040] Furthermore, the notification unit 14 may change the threshold T2 according to the first attribute information. For example, the notification unit 14 changes the threshold T2 based on the driver's level of driving experience and the driver's age included in the first attribute information. Specifically, the notification unit 14 increases the sensitivity of the notification by setting a higher threshold T2 the lower the level of driving experience of the driver of the first vehicle, that is, the shorter the driving experience of the driver of the first vehicle. By doing so, if the driver of the first vehicle has a low level of driving experience, the notification unit 14 can notify the driver of the first vehicle that the second vehicle is a dangerous vehicle at an early stage when the distance between the vehicles is not yet very short.

[0041] Next, the first operation of the driver assistance system 1 according to the first embodiment will be described using Figure 3.

[0042] Figure 3 is a flowchart showing an example of the first operation in the driver assistance system 1 according to the first embodiment.

[0043] As shown in Figure 3, in step S101, the attribute acquisition unit 21 of the driver assistance device 20 acquires second attribute information of the driver of the second vehicle. The second attribute information includes at least one of the driver's driving experience information and age information. Driving experience and age are expressed quantitatively. For example, driving experience is divided into levels such as 1, 2, ... n (where n is a natural number). A lower level of driving experience indicates less driving experience. If n=10, then a driver with a driving experience level of 1 to 3 is classified as a novice driver. A driver with a driving experience level of 4 to 7 is classified as an intermediate driver. A driver with a driving experience level of 8 to 10 is classified as an advanced driver. Age is expressed as m (where m is a natural number) years old.

[0044] Next, in step S102, the attribute communication unit 22 transmits the second attribute information to the driver assistance device 10 that provides driving assistance for the first vehicle.

[0045] Next, in step S103, the attribute communication unit 12 of the driver assistance device 10 receives the second attribute information from the driver assistance device 20. Next, in step S104, the rear distance detection unit 13 acquires the rear distance, which is the distance between the first vehicle and the second vehicle traveling behind it.

[0046] Next, in step S105, the notification unit 14 determines whether the second attribute information satisfies predetermined conditions. If the second attribute information satisfies predetermined conditions, it is, for example, in at least one of the following cases (1) to (3). (1) If the driver of the second vehicle has a level of driving experience that classifies them as a novice driver (e.g., level 1, 2, or 3). (2) If the driver of the second vehicle is of an age that would classify them as a young driver (for example, between 16 and 24 years old). (3) If the driver of the second vehicle is of an age that would classify them as an elderly driver (for example, 75 years of age or older). If it is determined that the second attribute information satisfies the predetermined conditions (YES in step S105), the process proceeds to step S106. On the other hand, if it is determined that the second attribute information does not satisfy the predetermined conditions (NO in step S105), the process proceeds to step S108.

[0047] Next, in step S106, the notification unit 14 determines whether the following distance is less than threshold T1. For example, the notification unit 14 sets threshold T1 as the following distance at which the driver of the first vehicle can safely drive even if the second attribute information satisfies predetermined conditions. If it is determined that the following distance is less than threshold T1 (YES in step S106), the process proceeds to step S107. On the other hand, if it is determined that the following distance is greater than or equal to threshold T1 (NO in step S106), the process proceeds to S108. In step S106, the notification unit 14 may change threshold T1 according to the second attribute information. For example, the notification unit 14 changes threshold T1 based on the driver's level of driving experience or the driver's age included in the second attribute information. Specifically, the notification unit 14 sets a higher threshold T1 the lower the level of driving experience of the driver of the second vehicle, that is, the shorter the driving experience of the driver of the second vehicle. Furthermore, when the notification unit 14 changes the threshold T1 according to the second attribute information, it does not need to perform the process in step S105 which determines whether or not the second attribute information satisfies predetermined conditions.

[0048] Next, in step S107, the notification unit 14 notifies the driver of the first vehicle that the second vehicle is a dangerous vehicle. It has been suggested that when the driver is a novice driver, a young driver, or an elderly driver, vehicle collisions due to the driver's inattention are more likely to occur. In other words, if the driver of the second vehicle is a novice driver or the like, and the distance between the first and second vehicles is short, the notification unit 14 notifies the driver of the first vehicle that the second vehicle is a dangerous vehicle.

[0049] Next, in step S108, the notification unit 14 determines whether or not to terminate the notification process in steps S104 to S107. For example, if the engine of the first vehicle is turned OFF, it determines to terminate the notification process. If it is determined that the notification process should be terminated (YES in step S108), the series of processes ends. If it is determined that the notification process should not be terminated (NO in step S108), the process returns to the process in step S104.

[0050] As described above, the driver assistance system 1 can provide driver assistance by notifying the driver of the first vehicle that the second vehicle is a dangerous vehicle if the distance between the first and second vehicles is short, even though the driver of the second vehicle following behind is a novice driver or the like. In other words, the driver assistance system 1 can provide further driver assistance to the driver by using information about other vehicles driven by novice drivers or the like in the surrounding area.

[0051] Next, the second operation of the driver assistance system 1 according to the first embodiment will be described using Figures 4 and 5.

[0052] Figures 4 and 5 are flowcharts illustrating an example of a second operation in the driver assistance system 1 according to the first embodiment.

[0053] As shown in Figure 4, in step S201, the attribute acquisition unit 11 of the driver assistance device 10 that provides driving assistance for the first vehicle acquires first attribute information, which is attribute information of the driver of the first vehicle. The first attribute information includes at least one of the driver's driving experience information and age information. Driving experience and age are expressed quantitatively. For example, driving experience is divided into levels such as 1, 2, ... n (where n is a natural number). The lower the level of driving experience, the shorter the driving experience. Also, if n=10, a driver with a driving experience level of 1 to 3 is classified as a novice driver. A driver with a driving experience level of 4 to 7 is classified as an intermediate driver. A driver with a driving experience level of 8 to 10 is classified as an advanced driver. Age is expressed as m (where m is a natural number) years old.

[0054] Next, in step S202, the attribute communication unit 12 transmits the first attribute information to the driver assistance device 20 that provides driving assistance for the second vehicle. Before step S202, the attribute communication unit 12 may acquire at least one of the traffic information and illumination information around the first vehicle. The traffic information includes information on the degree of congestion around the vehicle. The illumination information includes information on the darkness around the vehicle. Then, in step S202, the attribute communication unit 12 may determine to transmit the first attribute information to the driver assistance device 20 if the degree of congestion around the first vehicle is above a predetermined threshold, and / or if the darkness around the first vehicle is below a predetermined threshold.

[0055] Next, in step S203, the attribute communication unit 22 of the driver assistance device 20 receives first attribute information from the driver assistance device 10. Next, in step S204, the attribute communication unit 22 outputs the first attribute information to the driver of the second vehicle. Next, in step S205, the attribute communication unit 22 transmits information to the driver support device 10 indicating that the first attribute information has been output to the driver of the second vehicle.

[0056] Next, in step S206, the attribute communication unit 12 of the driver assistance device 10 receives information from the driver assistance device 20 indicating that the first attribute information has been output to the driver of the second vehicle.

[0057] Next, as shown in Figure 5, in step S207, the rear distance detection unit 13 acquires the rear distance, which is the distance between the first vehicle and the second vehicle behind it.

[0058] Next, in step S208, the notification unit 14 determines whether the first attribute information satisfies predetermined conditions. If the first attribute information satisfies predetermined conditions, it is, for example, at least one of the following cases (1) to (3). (1) If the driver of the first vehicle has a level of driving experience that classifies them as a novice driver (e.g., level 1, 2, or 3). (2) If the driver of the first vehicle is of an age that would classify them as a young driver (for example, between 16 and 24 years old). (3) If the driver of the first vehicle is of an age that would classify them as an elderly driver (for example, 75 years of age or older). If it is determined that the first attribute information satisfies the predetermined conditions (YES in step S208), the process proceeds to step S209. On the other hand, if it is determined that the first attribute information does not satisfy the predetermined conditions (NO in step S208), the process proceeds to step S211.

[0059] Next, in step S209, the notification unit 14 determines whether the following distance is less than the threshold T2. For example, the notification unit 14 sets the following distance T2 as the distance at which the driver of the first vehicle can safely drive even if the first attribute information satisfies predetermined conditions. If it is determined that the following distance is less than the threshold T2 (YES in step S209), the process proceeds to step S210. On the other hand, if it is determined that the following distance is greater than or equal to the threshold T2 (NO in step S209), the process proceeds to step S211. In step S209, the notification unit 14 may set the threshold T2 according to the first attribute information. Specifically, the notification unit 14 may set the threshold T2 higher the lower the level of driving experience of the driver of the first vehicle, that is, the shorter the driving experience. If the notification unit 14 changes the threshold T2 according to the first attribute information, it does not need to perform the process in step S208, which determines whether the first attribute information satisfies predetermined conditions.

[0060] Next, in step S210, the notification unit 14 notifies the driver of the first vehicle that the second vehicle is a dangerous vehicle. The notification unit 14 notifies the driver of the second vehicle, which is behind the first vehicle, that the second vehicle is a dangerous vehicle if the distance between the first and second vehicles is short, even though the driver of the first vehicle is aware that the driver of the first vehicle is a novice driver or the like.

[0061] Next, in step S211, the notification unit 14 determines whether or not to terminate the notification process in steps S207 to S210. For example, if the engine of the first vehicle is turned OFF, it determines to terminate the notification process. If it is determined that the notification process should be terminated (YES in step S211), the series of processes ends. If it is determined that the notification process should not be terminated (NO in step S211), the process returns to the process in step S207.

[0062] As described above, the driver assistance system 1 can provide driver assistance by notifying the driver of the second vehicle behind the first vehicle of the danger vehicle if the distance between the first and second vehicles is short, even though the driver of the second vehicle behind the first vehicle knows that the driver of the first vehicle is a novice driver or the like. In other words, the driver assistance system 1 can provide further driver assistance to the driver by using information about other vehicles driven by novice drivers or the like in the surrounding area.

[0063] (Second embodiment) Next, an example of the configuration of the driver assistance system 2 according to the second embodiment will be described using Figures 6 and 7.

[0064] Figure 6 is a schematic diagram showing an example of the configuration of the driver assistance system 2 according to the second embodiment. Figure 7 is a block diagram showing an example of the configuration of the driver assistance system 2 according to the second embodiment.

[0065] As shown in Figures 6 and 7, the driver assistance system 2 assumes a scenario in which there is a first vehicle, a second vehicle traveling behind the first vehicle, and a third vehicle traveling in front of the first vehicle.

[0066] Compared to the driver assistance system 1 according to the first embodiment, the driver assistance system 2 further includes a driver assistance device 30, a camera 301, and a touch panel 303. The driver assistance device 30, camera 301, and touch panel 303 are mounted on a third vehicle, which is a vehicle traveling in front of the first vehicle. The driver assistance device 30 is, for example, a computer and is a device that provides driving assistance for the third vehicle. Note that the driver assistance device 30 may not be mounted on the third vehicle, but may be implemented on a device such as a server located outside the third vehicle. The camera 301 and touch panel 303 have the same functions as the camera 101 and touch panel 103, respectively.

[0067] The driver assistance device 30 communicates wirelessly with the driver assistance device 10. Alternatively, the driver assistance device 30 may communicate wirelessly with the driver assistance device 10 via the server 500. Furthermore, the driver assistance device 30 communicates wirelessly or via wired connection with the camera 301 and the touch panel 303.

[0068] Next, we will describe the specific configurations of the driver assistance devices 10 and 30 of the driver assistance system 2 according to the second embodiment. The driver assistance device 10 of the driver assistance system 2 further includes a vehicle distance maintenance function unit 16 and a vehicle distance maintenance function control unit 17, compared to the components of the driver assistance device 10 of the driver assistance system 1. The driver assistance device 30 includes an attribute acquisition unit 31 and an attribute communication unit 32.

[0069] The attribute acquisition unit 31 of the driver assistance device 30 acquires attribute information of the driver of the third vehicle (hereinafter referred to as third-vehicle attribute information). The attribute acquisition unit 31 acquires third-vehicle attribute information before the driver starts the third vehicle or when the driver is driving the third vehicle. The acquisition of attribute information is performed in the same way as the attribute acquisition unit 21 described above, so the details are omitted.

[0070] The attribute communication unit 32 then transmits the third attribute information to the driver assistance device 10, which provides driving assistance for the first vehicle traveling behind the third vehicle. The transmission of attribute information is performed in the same manner as the attribute communication unit 22 described above, so the details are omitted.

[0071] The vehicle distance maintenance function unit 16 has the function of driving the first vehicle while maintaining the distance between the first vehicle and the third vehicle (hereinafter referred to as the vehicle distance maintenance function of the first vehicle relative to the third vehicle). The vehicle distance maintenance function is, for example, adaptive cruise control. Specifically, the vehicle distance maintenance function unit 16 calculates the distance between the first vehicle and the third vehicle based on the measurement information of the sensor 102. The vehicle distance maintenance function unit 16 communicates with the ECU of the first vehicle and drives the first vehicle while maintaining the distance between the first vehicle and the third vehicle at a preset distance. If the first vehicle is equipped with a vehicle distance maintenance function, that function of the first vehicle may be used instead of the vehicle distance maintenance function unit 16.

[0072] The inter-vehicle distance maintenance function control unit 17 controls the inter-vehicle distance maintenance function of the first vehicle relative to the third vehicle, which is performed by the inter-vehicle distance maintenance function unit 16. Specifically, the inter-vehicle distance maintenance function control unit 17 turns the inter-vehicle distance maintenance function of the first vehicle relative to the third vehicle on or off based on the operation input of the driver of the first vehicle. In addition, after receiving third attribute information from the driver assistance device 30, the inter-vehicle distance maintenance function control unit 17 controls the inter-vehicle distance maintenance function of the first vehicle based on the third attribute information. Furthermore, if the third attribute information satisfies predetermined conditions, the inter-vehicle distance maintenance function control unit 17 either turns off the inter-vehicle distance maintenance function of the first vehicle or changes the parameters of the inter-vehicle distance maintenance function to maintain a longer inter-vehicle distance than when the third attribute information does not satisfy predetermined conditions. If the third attribute information satisfies predetermined conditions, for example, it is at least one of the following (1) to (3). (1) If the driver of the third vehicle has a level of driving experience that classifies them as a novice driver (e.g., level 1, 2, or 3). (2) If the driver of the third vehicle is of an age that would classify them as a young driver (for example, between 16 and 24 years old). (3) If the driver of the third vehicle is of an age that would classify them as an elderly driver (for example, 75 years of age or older).

[0073] Next, the operation of the driver assistance system 2 according to the second embodiment will be explained using Figure 8. Figure 8 is a flowchart showing an example of the operation of the driver assistance system 2 according to the second embodiment.

[0074] First, as shown in Figure 8, in step S301, the attribute acquisition unit 31 of the driver assistance device 30 acquires third attribute information, which is attribute information of the driver of the third vehicle. Driving experience and age are expressed quantitatively. For example, driving experience is divided into levels such as 1, 2, ... n (where n is a natural number). The lower the level of driving experience, the shorter the driving experience. Also, if n=10, drivers with a driving experience level of 1 to 3 are classified as novice drivers. Drivers with a driving experience level of 4 to 7 are classified as intermediate drivers. Drivers with a driving experience level of 8 to 10 are classified as advanced drivers. Age is expressed as m (where m is a natural number) years old. Next, in step S302, the attribute communication unit 32 transmits the third attribute information to the driver assistance device 10 that provides driving assistance for the first vehicle.

[0075] Next, in step S303, the attribute communication unit 12 of the driver assistance device 10 receives third attribute information from the driver assistance device 30. Next, in step S304, the distance maintenance function control unit 17 determines whether the distance maintenance function of the first vehicle relative to the third vehicle by the distance maintenance function unit 16 is turned on. If it is determined that the distance maintenance function of the first vehicle relative to the third vehicle is turned on (YES in step S304), the process proceeds to step S305. On the other hand, if it is determined that the distance maintenance function of the first vehicle relative to the third vehicle is turned off (NO in step S304), the process proceeds to step S307.

[0076] Next, in step S305, the vehicle distance maintenance function control unit 17 determines whether the third attribute information satisfies predetermined conditions. If the third attribute information satisfies predetermined conditions, it is, for example, at least one of the following cases (1) to (3). (1) If the driver of the third vehicle has a level of driving experience that classifies them as a novice driver (e.g., level 1, 2, or 3). (2) If the driver of the third vehicle is of an age that would classify them as a young driver (for example, between 16 and 24 years old). (3) If the driver of the third vehicle is of an age that would classify them as an elderly driver (for example, 75 years of age or older). If it is determined that the third attribute information satisfies the predetermined conditions (YES in step S305), the process proceeds to step S306. On the other hand, if it is determined that the third attribute information does not satisfy the predetermined conditions (NO in step S305), the process proceeds to step S307.

[0077] In step S306, the vehicle distance maintenance function control unit 17 turns off the vehicle distance maintenance function of the first vehicle relative to the third vehicle. Next, in step S307, the vehicle distance maintenance function control unit 17 determines whether or not to terminate the control processing in steps S304 to S306. For example, if the engine of the first vehicle is turned OFF, it is determined to terminate the control processing. If it is determined to terminate the control processing (YES in step S307), the series of processes ends. If it is determined not to terminate the control processing (NO in step S307), the process returns to the process in step S304.

[0078] When the driver of the third vehicle traveling ahead of the first vehicle is a novice driver, a young driver, or an elderly driver, their acceleration and braking may not be smooth, and the speed of the third vehicle tends to be unstable. Therefore, if the first vehicle follows the third vehicle while maintaining a safe distance, the speed of the first vehicle will also fluctuate significantly, potentially reducing the driving comfort of the first vehicle's driver. Even if the distance between the first and third vehicles is increased, the issue of the first vehicle's driver's driving comfort will not be resolved. Furthermore, even if the following sensitivity of the first vehicle is reduced, the possibility of a collision between the first and third vehicles increases. Therefore, in the driver assistance system 2, when the driver of the third vehicle traveling ahead is a novice driver or similar, the driver assistance system 2 turns off the first vehicle's distance maintenance function for the third vehicle and switches the first vehicle to manual driving. By doing so, the driver assistance system 2 can improve the driving comfort of the first vehicle's driver.

[0079] The components of the driver assistance devices 10 and 20 of the driver assistance system 1 and the driver assistance devices 10 and 30 of the driver assistance system 2 in the above-described embodiment are composed of hardware, software, or both, and may consist of one piece of hardware or software, or multiple pieces of hardware or software. Furthermore, each of the above-described components may be selected or omitted as needed. For example, cameras 101, 201, and 301 are arranged for the purpose of acquiring attribute information of the first, second, and third drivers, but their function may be replaced by other means such as a driver's license reader or touch panel input.

[0080] Specifically, the driver assistance devices 10 and 20 of the driver assistance system 1 and the driver assistance devices 10 and 30 of the driver assistance system 2 in the above-described embodiment are each composed of a computer comprising a processor and memory. The processor may be, for example, a microprocessor, an MPU (Micro Processing Unit), or a CPU (Central Processing Unit). The processor may include multiple processors. The memory is composed of a combination of volatile memory and non-volatile memory. The memory may include storage located away from the processor. In this case, the processor may access the memory via an I / O interface not shown. The processor executes one or more programs containing a set of instructions for causing the computer to perform the algorithms described with reference to the drawings.

[0081] The program, when loaded into a computer, includes a set of instructions (or software code) for causing the computer to perform one or more of the functions described in the embodiments. The program may be stored on a non-temporary computer-readable medium or a physical storage medium. Examples, but not limited to, include random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drive (SSD) or other memory technologies, CD-ROM, digital versatile disc (DVD), Blu-ray® disc or other optical disc storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices. The program may be transmitted over a temporary computer-readable medium or a communication medium. Examples, but not limited to, include temporary computer-readable medium or a communication medium that includes electrically, optically, acoustically or otherwise propagating signals.

[0082] Although the present disclosure has been described above with reference to embodiments, the present disclosure is not limited to the embodiments described above. Various modifications to the structure and details of the present disclosure are possible, as can be understood by those skilled in the art within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

[0083] Each drawing is merely illustrative to illustrate one or more embodiments. Each drawing may be associated with one or more other embodiments rather than with only one specific embodiment. As those skilled in the art will understand, various features or steps described with reference to any one drawing can be combined with features or steps shown in one or more other drawings, for example, to create embodiments not explicitly shown or described. Not all features or steps shown in any one drawing to illustrate an exemplary embodiment are necessarily required, and some features or steps may be omitted. The order of steps shown in any of the drawings may be changed as appropriate. [Explanation of symbols]

[0084] 1. Driver assistance system 2. Driver assistance systems 10. Driving support system (first driving support system) 11 Attribute acquisition part 12 Attribute Communication Section 13 Rear distance detection unit 14 Hochi Department 15. Surrounding Environment Information Acquisition Unit 16 Inter-vehicle distance maintenance function section 17. Vehicle distance maintenance function control unit 20. Driving support system (second driving support system) 21 Attribute acquisition part 22 Attribute Communication Section 30. Driving assistance system (third driving assistance system) 31 Attribute acquisition part 32 Attribute Communication Section 101 Camera 102 Sensors 103 Touch Panel 104 displays 105 Speakers 201 Camera 203 Touch Panel 204 displays 205 Speakers 301 Camera 303 Touch Panel 500 servers

Claims

1. A first driver assistance device that provides driver assistance for the first vehicle, An attribute communication unit receives second attribute information, which is attribute information of the driver of a second vehicle traveling behind the first vehicle, from a second driver assistance device that provides driving assistance for the second vehicle, A rear distance detection unit detects the rear distance, which is the distance between the first vehicle and the second vehicle. The system includes a notification unit that, when the second attribute information satisfies predetermined conditions and the following distance is less than a first threshold, notifies the driver of the first vehicle that the second vehicle is a dangerous vehicle. Driving assistance system.

2. The system further includes an attribute acquisition unit that acquires first attribute information, which is attribute information of the driver of the first vehicle. The attribute communication unit is, The first attribute information is transmitted to the second driver assistance device, and information indicating that the first attribute information has been output to the driver of the second vehicle is received from the second driver assistance device. The aforementioned notification department, After the driver of the second vehicle receives information indicating that the first attribute information has been output, if the first attribute information satisfies predetermined conditions and the following distance is less than the second threshold, the driver of the first vehicle is notified that the second vehicle is a dangerous vehicle. The driving support device according to claim 1.

3. The first attribute information and the second attribute information include at least one of the following: information on driving experience and information on age. The aforementioned notification department, Based on the second attribute information, the first threshold is changed. At least one of the following: changing the second threshold based on the first attribute information. The driving support device according to claim 2.

4. The system further includes an information acquisition unit that acquires at least one of the following: traffic information including information on the degree of congestion around the first vehicle and illumination information including information on the darkness around the first vehicle. The attribute communication unit is, The first attribute information is transmitted to the second driving support device if, at least one of the following occurs: the congestion level included in the traffic information is above a predetermined threshold, or the darkness level included in the illumination information is below a predetermined threshold. The driving support device according to claim 2.

5. A distance maintenance function unit has a function to maintain a predetermined distance between the first vehicle and a third vehicle traveling in front of the first vehicle, and to drive the first vehicle while maintaining this distance. The system further comprises a distance-keeping function control unit that controls the switching of the distance-keeping function on and off, The attribute communication unit is, The third attribute information, which is attribute information of the driver of the third vehicle, is received from the third driver assistance device that provides driving assistance for the third vehicle. The aforementioned vehicle distance maintenance function control unit is: Based at least on the third attribute information, the following control functions are configured to maintain the distance between vehicles. The driving support device according to claim 1.

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