JP2017142579A - On-vehicle device, computer program and caution information provision method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle device capable of providing caution information for preventing collision beforehand, a computer program for realizing the on-vehicle device and a caution information method by the on-vehicle device.SOLUTION: An on-vehicle device includes: a position acquisition unit configured to obtain a position of an own vehicle; a determination unit configured to determine an existence of an alarming event related to a passage of a road; a generation unit configured to generate, if the determination unit determines that the alarming event is present, caution information including an existence of the alarming event and a position of the alarming event according to the position obtained at the position acquisition unit; and a transmission unit configured to transmit the caution information generated at the generation unit to a rear vehicle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an in-vehicle device mounted on a vehicle, a computer program for realizing the in-vehicle device, and a method for providing caution information by the in-vehicle device.

  When an obstacle such as an accident vehicle, a broken vehicle, a fallen baggage, crumbled earth and sand, etc. occurs on the road, a technology has been developed to quickly detect the obstacle and notify or guide the following vehicle. . For example, it receives trajectory information of a plurality of vehicles, detects a lane change of the vehicle based on the received trajectory information, and the ratio of the number of vehicles that have changed the lane to the number of vehicles that have passed through a predetermined area is a predetermined amount. An apparatus for detecting the presence of an obstacle in the area when the threshold is exceeded is disclosed (see Patent Document 1).

JP 2006-313519 A

  Although the device of Patent Document 1 can accurately detect the presence of an obstacle, it is necessary to communicate between the probe vehicle and the road device, and to acquire trajectory information including the position information of the probe vehicle by the road device. There is. For this reason, it is desirable to detect the presence of obstacles even on roads where infrastructure equipment such as road devices is not installed. On the other hand, not only obstacles left on the road but also narrow roads or the like may cause a collision accident when an oncoming vehicle approaches, and it is desirable to prevent such an accident in advance.

  The present invention has been made in view of such circumstances, and an in-vehicle device capable of providing caution information to prevent a collision accident, a computer program for realizing the in-vehicle device, and a caution by the in-vehicle device An object is to provide an information providing method.

  An in-vehicle device according to an embodiment of the present invention is an in-vehicle device mounted on a vehicle, a position acquisition unit that acquires the position of the host vehicle, and a determination unit that determines the presence or absence of an attention event related to traffic on a road, When the determination unit determines that there is a caution event, based on the position acquired by the position acquisition unit, a generation unit that generates the caution information including the presence of the caution event and the position of the caution event; A transmission unit that transmits the attention information generated by the generation unit to the rear vehicle.

  A computer program according to an embodiment of the present invention is a computer program for causing a computer to provide attention information. The computer includes a position acquisition unit that acquires the position of the host vehicle, and an attention event related to traffic on the road. A determination unit that determines whether or not there is an attention event, and generation that generates attention information including the presence of the attention event and the position of the attention event based on the acquired position of the own vehicle when it is determined that there is the attention event And the output unit that outputs the generated attention information to the rear vehicle.

  A method for providing attention information according to an embodiment of the present invention is a method for providing attention information by an in-vehicle device mounted on a vehicle, wherein the position acquisition unit acquires the position of the host vehicle, and When the presence / absence is determined by the determination unit and it is determined that there is the attention event, the generation unit generates the attention information including the presence of the attention event and the position of the attention event based on the acquired position of the own vehicle Is generated, and the transmitter transmits the generated attention information to the rear vehicle.

  According to the present invention, it is possible to prevent a collision accident by providing caution information.

It is explanatory drawing which shows an example of the principal part structure of the own vehicle carrying the vehicle-mounted apparatus of this Embodiment. It is a schematic diagram which shows the 1st example of provision of the caution information by the vehicle-mounted apparatus of this Embodiment. It is a schematic diagram which shows the 2nd example of provision of caution information by the vehicle-mounted apparatus of this Embodiment. It is a schematic diagram which shows the 3rd example of provision of the caution information by the vehicle-mounted apparatus of this Embodiment. It is a flowchart which shows the 1st example of the process sequence by the vehicle-mounted apparatus of this Embodiment. It is a flowchart which shows the 2nd example of the process sequence by the vehicle-mounted apparatus of this Embodiment. It is a flowchart which shows the 3rd example of the process sequence by the vehicle-mounted apparatus of this Embodiment.

[Description of Embodiment of Present Invention]
An in-vehicle device according to an embodiment of the present invention is an in-vehicle device mounted on a vehicle, a position acquisition unit that acquires the position of the host vehicle, and a determination unit that determines the presence or absence of an attention event related to traffic on a road, When the determination unit determines that there is a caution event, based on the position acquired by the position acquisition unit, a generation unit that generates the caution information including the presence of the caution event and the position of the caution event; A transmission unit that transmits the attention information generated by the generation unit to the rear vehicle.

  A computer program according to an embodiment of the present invention is a computer program for causing a computer to provide attention information. The computer includes a position acquisition unit that acquires the position of the host vehicle, and an attention event related to traffic on the road. A determination unit that determines whether or not there is an attention event, and generation that generates attention information including the presence of the attention event and the position of the attention event based on the acquired position of the own vehicle when it is determined that there is the attention event And the output unit that outputs the generated attention information to the rear vehicle.

  A method for providing attention information according to an embodiment of the present invention is a method for providing attention information by an in-vehicle device mounted on a vehicle, wherein the position acquisition unit acquires the position of the host vehicle, and When the presence / absence is determined by the determination unit and it is determined that there is the attention event, the generation unit generates the attention information including the presence of the attention event and the position of the attention event based on the acquired position of the own vehicle Is generated, and the transmitter transmits the generated attention information to the rear vehicle.

  The position acquisition unit acquires the position of the host vehicle. In order to acquire the position of the own vehicle, for example, GPS (Global Positioning System), autonomous navigation, or a combination of GPS and autonomous navigation can be used.

  The determination unit determines whether or not there is an attention event related to traffic on the road. A traffic caution event is an event that the driver must be careful about when traveling on the road. For example, if it is difficult to pass an oncoming vehicle, two-wheeled vehicle, or pedestrian, the vehicle will pass through the road during construction. Including cases where it is difficult.

  When the determination unit determines that there is a caution event, the generation unit generates caution information including the presence of the caution event and the position of the caution event based on the position acquired by the position acquisition unit. The position of the attention event may be the position of the host vehicle when it is determined that the attention event exists, may be the position of the attention event, or may be a required section including the position of the host vehicle.

  The transmission unit transmits the attention information generated by the generation unit to the rear vehicle. The rear vehicle is, for example, a vehicle that travels from the rear of the host vehicle toward the host vehicle. As a result, the driver of the rear vehicle can know in advance where the caution event exists and is alerted, so that it is possible to prevent the occurrence of a collision accident in advance.

  An in-vehicle device according to an embodiment of the present invention includes a shift position acquisition unit that acquires a shift position of a transmission of the host vehicle, and the determination unit is configured to perform a caution event when the shift position changes from a forward position to a reverse position. Judge that there is.

  The shift position acquisition unit acquires the shift position of the transmission of the host vehicle. The determination unit determines that there is a caution event when the shift position changes from the forward position to the reverse position. It can be considered that the host vehicle that has traveled retreats, for example, because there is an oncoming vehicle on a narrow road, so that the host vehicle is once moved back to a point where it can pass the oncoming vehicle. Therefore, when the shift position changes from the forward position to the reverse position, it can be determined that there is an attention event that makes it difficult to pass. Thereby, the presence or absence of a caution event can be determined from the behavior of the host vehicle. On the other hand, since the road width of the intersection is narrow and a part that cannot be bent without turning back once, the inside of the parking lot, and the like are also detected, the event is again determined by the determination unit described later.

  An in-vehicle device according to an embodiment of the present invention includes a vehicle speed acquisition unit that acquires a vehicle speed of the host vehicle, and the determination unit determines whether the vehicle speed of the host vehicle is equal to or higher than a predetermined speed for a predetermined time. When the speed is lower than the value, it is determined that there is an attention event.

  The vehicle speed acquisition unit acquires the vehicle speed of the host vehicle. The determination unit determines that there is a caution event when the vehicle speed of the host vehicle changes from a speed equal to or higher than a predetermined speed to a speed equal to or lower than a predetermined lower limit value during a predetermined time. The predetermined time can be, for example, a time of about 1 second to 5 seconds. The predetermined speed can be, for example, a speed limit of a road on which the host vehicle is traveling. Moreover, a lower limit can be 10 km / h, for example.

  For example, when the driver of the host vehicle traveling at a predetermined speed or more visually recognizes the approach of the oncoming vehicle from the front, the driver operates the brake to decelerate the host vehicle. Further, if it is determined that the oncoming vehicle approaches and it is difficult to pass the oncoming vehicle, the vehicle may further decelerate. Therefore, when the vehicle speed of the host vehicle changes from a speed equal to or higher than a predetermined speed to a speed equal to or lower than a predetermined lower limit value, it can be determined that there is an attention event that makes it difficult to pass. Thereby, the presence or absence of a caution event can be determined from the behavior of the host vehicle.

  The in-vehicle device according to the embodiment of the present invention includes an external sensor that acquires the peripheral information of the host vehicle, and the determination unit determines that there is a caution event based on the peripheral information acquired by the external sensor.

  An external sensor that acquires the surrounding information of the host vehicle is provided. As the external sensor, for example, a vehicle-mounted camera, a rider (LIDAR: Laser Imaging Detection and Ranging), or the like can be used.

  The determination unit determines that there is a caution event based on the peripheral information acquired by the external sensor. For example, by analyzing the image obtained by imaging the front of the host vehicle with the in-vehicle camera, or analyzing the data obtained by the rider, whether the oncoming vehicle is large as well as the presence of the oncoming vehicle Can be determined. Further, by specifying the width of the road, the width of the oncoming vehicle, and the like, it is possible to more accurately determine the presence or absence of an attention event that makes it difficult to pass.

  The in-vehicle device according to the embodiment of the present invention includes a road information acquisition unit that acquires road information, and whether the road on which the host vehicle is traveling is a specific road based on the road information acquired by the road information acquisition unit. A road determination unit for determining whether or not the road on which the vehicle travels is a specific road, and determines that there is a caution event.

  The road information acquisition unit acquires road information. The road information can be acquired from, for example, map information. The road determination unit determines whether the road on which the host vehicle is traveling is a specific road based on the road information acquired by the road information acquisition unit. Specific roads are mountain roads or rural roads, excluding urban roads, including roads with no signal, roads with many curves, roads with narrow roads, etc. over the required distance. be able to.

  The determination unit determines that there is a caution event when the road on which the host vehicle is traveling is a specific road. When the host vehicle travels on a specific road, it can be considered that there are more opportunities to encounter a caution event. Therefore, by determining whether or not the road on which the host vehicle is traveling is a specific road, it can be determined with higher accuracy whether or not there is a caution event that makes it difficult to pass.

  An in-vehicle device according to an embodiment of the present invention includes a vehicle-to-vehicle communication determination unit that determines whether vehicle-to-vehicle communication is possible with a rear vehicle, and the transmission unit includes the vehicle-to-vehicle communication determination unit. The caution information is transmitted to the rear vehicle determined that the inter-vehicle communication is possible.

  A vehicle-to-vehicle communication determination unit determines whether vehicle-to-vehicle communication is possible with a rear vehicle. The inter-vehicle communication realizes direct communication between vehicles (on-vehicle devices), and for example, a predetermined frequency band of ITS (Intelligent Transport Systems) can be used. It is possible to acquire the vehicle running status (position, speed, traveling direction, etc.) in real time by inter-vehicle communication. “Vehicle-to-vehicle communication is possible” not only means that communication is possible, but also includes that certain security is ensured.

  The transmission unit transmits the caution information to the rear vehicle that has been determined by the vehicle-to-vehicle communication determination unit to be able to perform vehicle-to-vehicle communication. As a result, the caution information can be transmitted only to the rear vehicle capable of inter-vehicle communication, the transmission destination for transmitting the caution information can be limited, and unnecessary information can be prevented from being transmitted. .

  An in-vehicle device according to an embodiment of the present invention includes a host vehicle traveling direction acquisition unit that acquires a traveling direction of the host vehicle, a rear vehicle traveling direction acquisition unit that acquires a traveling direction of a rear vehicle, and a traveling direction of the host vehicle. A traveling direction determination unit that determines whether or not the traveling direction of the rear vehicle is within a predetermined range, and the transmission unit is determined to be within the predetermined range by the traveling direction determination unit The notice information is transmitted to

  The own vehicle traveling direction acquisition unit acquires the traveling direction of the own vehicle. By repeatedly acquiring the position of the host vehicle and the time at the position, the traveling direction can be acquired. A back vehicle advancing direction acquisition part acquires the advancing direction of a back vehicle using vehicle-to-vehicle communication, for example.

  The traveling direction determination unit determines whether or not the traveling direction of the host vehicle and the traveling direction of the rear vehicle are within a predetermined range. The predetermined range may be a range in which it is possible to distinguish whether the rear vehicle is traveling in a direction approaching the host vehicle or in a direction away from the host vehicle.

  The transmission unit transmits the caution information to the rear vehicle determined by the traveling direction determination unit as being within a predetermined range. As a result, the caution information can be transmitted only to the rear vehicle traveling in the direction approaching the own vehicle, that is, toward the position where the caution event exists, and unnecessary information for the rear vehicle traveling in the direction away from the own vehicle. Can be prevented from being transmitted.

  An in-vehicle device according to an embodiment of the present invention includes a receiving unit that receives caution information from a preceding vehicle, and the transmitting unit transmits the received caution information to a rear vehicle when the receiving unit receives the caution information. To do.

  A receiving unit is provided for receiving caution information from the vehicle ahead. A transmission part transmits the received attention information to a back vehicle, when attention information is received in a receiving part. Accordingly, the caution information can be provided not only to the rear vehicle capable of communicating with the host vehicle but also to other rear vehicles capable of communicating with the rear vehicle.

[Details of the embodiment of the present invention]
DESCRIPTION OF EMBODIMENTS Hereinafter, an in-vehicle apparatus, a computer program, and an attention information providing method according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram illustrating an example of a configuration of a main part of a host vehicle 100 on which the in-vehicle device 50 according to the present embodiment is mounted. As shown in FIG. 1, the in-vehicle device 50 of the present embodiment includes a brake control device 2, an external sensor 3, a transmission controller 4, a navigation device 5, a HUD (Head-Up) via a communication line 1 such as an in-vehicle LAN. Display) 6 etc. are connected.

  The brake control device 2 outputs the vehicle speed of the host vehicle 100 to the in-vehicle device 50. Further, the brake control device 2 outputs brake operation information to the in-vehicle device 50 when the driver of the host vehicle 100 performs a brake operation.

  The external sensor 3 includes, for example, an in-vehicle camera or a rider (LIDAR: Laser Imaging Detection and Ranging) and acquires peripheral information of the host vehicle 100. The external sensor 3 includes a processing unit, for example, an oncoming vehicle exists by analyzing an image obtained by imaging the front of the host vehicle 100 with an in-vehicle camera or analyzing data obtained by a rider. And whether or not the oncoming vehicle is large can be determined. The external sensor 3 can specify the width of the road, the width of the oncoming vehicle, and the like. The external sensor 3 outputs the determination result and the specific result to the in-vehicle device 50. In the example of FIG. 1, the external sensor 3 is configured to be connected to the in-vehicle device 50 via the communication line 1, but is not limited thereto, and is externally connected via a dedicated line (not shown). The sensor 3 may be connected to the in-vehicle device 50. Further, the above-described processing unit can be provided in the in-vehicle device 50.

  The transmission controller 4 outputs shift information (shift information) of the host vehicle 100 to the in-vehicle device 50. The shift information is a shift position of the transmission of the host vehicle 100 and includes, for example, a forward position (D: drive, first speed, second speed, etc.), a reverse position (R: reverse), and the like.

  The navigation device 5 incorporates map information, a GPS receiver, and the like, and based on information from a vehicle speed sensor, a gyro sensor, etc. (not shown), the position, speed, traveling direction, etc. of the host vehicle 100 are determined for a predetermined time period (for example, , 0.1 seconds). The navigation device 5 outputs information such as the position (current location) of the host vehicle 100 and the traveling direction to the in-vehicle device 50.

  The HUD 6 can display caution information generated by the in-vehicle device 50. Details of the attention information will be described later. Other display devices, audio output devices, and the like can be used as long as they can provide caution information to the driver instead of the HUD 6.

  The in-vehicle device 50 includes a control unit 10 that controls the entire device, an interface unit 11, a GPS (Global Positioning System) 12, a determination unit 13, a generation unit 14, a storage unit 15, a first communication unit 16, a second communication unit 17, A road determination unit 18 and a traveling direction determination unit 19 are provided.

  The interface unit 11 has an interface function with the brake control device 2, the external sensor 3, the transmission controller 4, the navigation device 5, and the HUD 6 via the communication line 1.

  The interface unit 11 has a function as a position acquisition unit, and acquires the position of the host vehicle 100 from the navigation device 5. The interface unit 11 has a function as a shift position acquisition unit, and acquires the shift position (shift information) of the transmission of the host vehicle 100. The interface unit 11 functions as a vehicle speed acquisition unit, and acquires the vehicle speed of the host vehicle 100.

  The interface unit 11 has a function as a road information acquisition unit, and acquires road information from the navigation device 5. The road information can be acquired from, for example, map information. The interface unit 11 has a function as a host vehicle traveling direction acquisition unit, and acquires the traveling direction of the host vehicle 100 from the navigation device 5.

  The GPS 12 has a function as a position acquisition unit that acquires the position of the host vehicle 100. Note that the position of the host vehicle 100 may be acquired by the GPS 12 or may be acquired from the navigation device 5.

  The determination unit 13 determines whether or not there is a caution event related to traffic on the road. A traffic caution event is an event that the driver must be careful about when traveling on the road. For example, if it is difficult to pass an oncoming vehicle, two-wheeled vehicle, or pedestrian, the vehicle will pass through the road during construction. Including cases where it is difficult.

  When the determination unit 13 determines that there is a caution event, the generation unit 14 generates caution information including the fact that the caution event exists and the position of the caution event based on the acquired position of the host vehicle 100. The position of the attention event may be the position of the host vehicle 100 when it is determined that the attention event exists, may be the position where the attention event exists, or may be a required section including the position of the host vehicle 100.

  The 1st communication part 16 has a function as a transmission part and a receiving part, and performs vehicle-to-vehicle communication between the other vehicles different from the own vehicle. Inter-vehicle communication uses, for example, ITS (Intelligent Transport System) radio, but is not limited to this.

  The first communication unit 16 transmits the attention information generated by the generation unit 14 to the rear vehicle traveling behind the host vehicle under the control of the control unit 10. As a result, the driver of the rear vehicle can know in advance where the caution event exists and is alerted, so that it is possible to prevent the occurrence of a collision accident in advance.

  The second communication unit 17 has a function of performing road-to-vehicle communication with a server or a roadside device (not shown) described later. Road-to-vehicle communication uses, for example, a cellular phone network in the band of 800 MHz to 2 GHz (for example, LTE [Long Term Evolution], 4G, 3G, etc.), a wireless LAN in the band of 2.4 GHz (for example, WiFi, etc.) However, the present invention is not limited to these. A management unit (hereinafter referred to as a server) is provided at the connection destination via the network. The server can generate road obstacle information and transmit route information or traffic information in response to a request from the vehicle.

  The second communication unit 17 transmits the attention information generated by the generation unit 14 to a server described later under the control of the control unit 10.

  The storage unit 15 stores the attention information generated by the generation unit 14, the attention information received by the first communication unit 16 or the second communication unit 17, and the like. In addition, the storage unit 15 can also store information related to the traveling state of the vehicle such as the position of the host vehicle 100.

  FIG. 2 is a schematic diagram showing a first example of provision of caution information by the in-vehicle device 50 of the present embodiment. FIG. 2 shows a state where the host vehicle 100 is traveling on a specific road. The specific road is, for example, a road excluding urban roads, such as a mountain road or a rural road, for example, a road with no signal over a required distance, a road with many curves, a road width Can include narrow roads. As shown in FIG. 2, an oncoming vehicle 110 is traveling toward the host vehicle 100 in front of the host vehicle 100. The oncoming vehicle 110 can be, for example, a large vehicle such as a bus or a truck. In addition, a rear vehicle 120 that travels in the same direction as the host vehicle 100 exists behind the host vehicle 100 (for example, a position within several hundred meters from the host vehicle 100).

  In the state illustrated in FIG. 2, when the determination unit 13 of the host vehicle 100 (the in-vehicle device 50) determines that it is difficult to pass the oncoming vehicle 110, the first communication unit 16 generates the attention information generated by the generation unit 14. Is transmitted to the rear vehicle 120 (indicated by symbol A in FIG. 2). Moreover, the 2nd communication part 17 transmits the attention information produced | generated by the production | generation part 14 to the server 200 (it shows with the code | symbol B in FIG. 2).

  The server 200 receives attention information. For example, the server 200 travels from the position of the attention event included in the attention information and the map information, for example, the location of the attention event (for example, the location where the host vehicle 100 and the oncoming vehicle 110 pass each other) several hundred meters to 5 km. The received caution information is sent to the vehicle. In the example of FIG. 2, the server 200 transmits attention information to the rear vehicle 120, but other vehicles are not limited to the rear vehicle 120. Even if inter-vehicle communication is not possible between the host vehicle 100 and the rear vehicle 120, the rear vehicle 120 can receive the caution information from the server 200. Therefore, the driver of the rear vehicle 120 must It is possible to recognize that the oncoming vehicle 110 that makes it difficult to pass is approaching.

  Next, a method for determining the presence / absence of a caution event will be specifically described.

  The determination unit 13 determines that there is a caution event when the shift position acquired via the interface unit 11 changes from the forward position to the reverse position. The traveling of the host vehicle 100 that has traveled can be considered to be a case where the host vehicle 100 is once moved backward to a point where it can pass the oncoming vehicle 110 because the oncoming vehicle 110 exists on a narrow road. Therefore, when the shift position changes from the forward position to the reverse position, it can be determined that there is an attention event that makes it difficult to pass. Thereby, the presence or absence of a caution event can be determined from the behavior of the host vehicle 100. It should be noted that the determination unit 13 can perform the determination process described later in order to reduce the possibility of erroneous determination at a location where the road width of the intersection is narrow and cannot be turned without turning back once, or in a parking lot or the like. .

  Further, the determination unit 13 determines that there is a caution event when the vehicle speed of the host vehicle 100 changes from a speed equal to or higher than a predetermined speed to a speed equal to or lower than a predetermined lower limit value during a predetermined time. The predetermined time can be, for example, a time of about 1 second to 5 seconds. The predetermined speed can be, for example, a speed limit of a road on which the host vehicle is traveling. Moreover, a lower limit can be 10 km / h, for example.

  When the driver of the host vehicle 100 traveling at a predetermined speed or more visually recognizes the approach of the oncoming vehicle 110 from the front, for example, the driver operates the brake to decelerate the host vehicle 100. Furthermore, if it is determined that the oncoming vehicle 110 is approaching and it is difficult to pass the oncoming vehicle 110, the vehicle may further decelerate. Therefore, when the vehicle speed of the host vehicle 100 changes from a speed equal to or higher than a predetermined speed to a speed equal to or lower than a predetermined lower limit value, it can be determined that there is an attention event that makes it difficult to pass. Thereby, the presence or absence of a caution event can be determined from the behavior of the host vehicle 100.

  The determination unit 13 determines that there is a caution event based on the peripheral information acquired by the external sensor 3. For example, as a result of analyzing an image obtained by imaging the front of the host vehicle 100 with a vehicle-mounted camera or a result of analyzing data obtained by a rider, not only the presence of the oncoming vehicle 110 but also the oncoming vehicle 110 is large. Whether or not it exists can also be determined. Further, by specifying the width of the road, the width of the oncoming vehicle 110, and the like, the presence or absence of a caution event that makes it difficult to pass can be determined with higher accuracy.

  Moreover, the determination part 13 can determine the presence or absence of a caution event using the road information of the road on which the host vehicle 100 is traveling. That is, the road determination unit 18 determines whether or not the road on which the host vehicle 100 travels is a specific road based on the road information acquired by the interface unit 11. Specific roads are mountain roads or rural roads, excluding urban roads, including roads with no signal, roads with many curves, roads with narrow roads, etc. over the required distance. be able to.

  Then, the determination unit 13 determines that there is a caution event when the road on which the host vehicle 100 travels is a specific road. When the host vehicle 100 travels on a specific road, it can be considered that there are more opportunities to encounter an attention event. Therefore, by determining whether or not the road on which the host vehicle 100 is traveling is a specific road, it can be determined with higher accuracy whether or not there is a caution event that makes passing difficult.

  Next, vehicle-to-vehicle communication will be described. The first communication unit 16 has a function as an inter-vehicle communication determination unit. The first communication unit 16 determines whether or not vehicle-to-vehicle communication is possible with the rear vehicle 120. The inter-vehicle communication realizes direct communication between vehicles (on-vehicle devices), and for example, a predetermined frequency band of ITS (Intelligent Transport Systems) can be used. It is possible to acquire the vehicle running status (position, speed, traveling direction, etc.) in real time by inter-vehicle communication. “Vehicle-to-vehicle communication is possible” not only means that communication is possible, but also that communication that provides a predetermined security function is possible.

  Examples of the security function include the following. For example, confidentiality is ensured for data including vehicle information and personal information by adopting a protocol whose communication path is encrypted. In addition, an illegal signal is not transmitted in order to prevent an increase in the bus load of the in-vehicle LAN or to prevent malfunction of a device on the in-vehicle LAN. In addition, vehicle-to-vehicle communication is performed only with a reliable vehicle so as not to confuse the driver by receiving erroneous information. The caution information is transmitted only when the inter-vehicle communication is established. In addition, the attention information (including the position information of the host vehicle 100) generated by the in-vehicle device 50 is transmitted only to the rear vehicle and the server 200 in which inter-vehicle communication is established, and is not transmitted to, for example, an unauthorized URL or the like. Guarantee.

  The first communication unit 16 transmits caution information to the rear vehicle 120 that has determined that vehicle-to-vehicle communication is possible. Accordingly, the caution information can be transmitted only to the rear vehicle 120 capable of inter-vehicle communication, the transmission destination of the caution information can be limited, and unnecessary information can be prevented from being transmitted. it can.

  FIG. 3 is a schematic diagram showing a second example of provision of caution information by the in-vehicle device 50 of the present embodiment. As shown in FIG. 3, an oncoming vehicle 110 is traveling toward the host vehicle 100 in front of the host vehicle 100. Further, behind the host vehicle 100, a rear vehicle 120 that travels in the same direction as the host vehicle 100 (direction approaching the host vehicle 100), and a rear that travels in a direction opposite to the host vehicle 100 (direction away from the host vehicle 100). A vehicle 130 exists. In the following description, it is assumed that the own vehicle 100 and the rear vehicles 120 and 130 can perform vehicle-to-vehicle communication (vehicle-to-vehicle communication has been established).

  The 1st communication part 16 has a function as a back vehicle advancing direction acquisition part, and acquires the advancing direction of the back vehicles 120 and 130. FIG.

  The traveling direction determination unit 19 determines whether or not the traveling direction of the host vehicle 100 and the traveling direction of the rear vehicles 120 and 130 are within a predetermined range. The predetermined range may be a range in which it is possible to distinguish whether the rear vehicle is traveling in a direction approaching the host vehicle or in a direction away from the host vehicle.

  The first communication unit 16 transmits the caution information to the rear vehicle 120 determined by the traveling direction determination unit 19 to be within a predetermined range. That is, as shown in FIG. 3, the rear vehicle 130 is traveling in the opposite direction to the host vehicle 100, and thus the attention information is not transmitted. As a result, the caution information can be transmitted only to the rear vehicle 120 traveling in the direction approaching the own vehicle 100, that is, the position where the attention event exists, and the rear vehicle 130 traveling in the direction away from the own vehicle 100 is transmitted to Therefore, it is possible to prevent unnecessary information from being transmitted.

  FIG. 4 is a schematic diagram showing a third example of provision of caution information by the in-vehicle device 50 of the present embodiment. As shown in FIG. 4, a forward vehicle 140 is traveling in front of the host vehicle 100. Further, behind the host vehicle 100, there is a rear vehicle 120 that travels in the same direction as the host vehicle 100 (direction approaching the host vehicle 100). In the following description, it is assumed that inter-vehicle communication is possible (established) between the host vehicle 100, the front vehicle 140, and the rear vehicle 120.

  The first communication unit 16 receives caution information from the preceding vehicle 140. The first communication unit 16 transmits the received attention information to the rear vehicle 120 under the control of the control unit 10. Thus, not only the own vehicle 100 (corresponding to the rear vehicle) capable of communicating with the front vehicle 140 (corresponding to the own vehicle) but also the other rear vehicle capable of communicating with the own vehicle 100 (rear vehicle). Caution information can also be provided to the vehicle 120.

  FIG. 5 is a flowchart showing a first example of a processing procedure by the in-vehicle device 50 of the present embodiment. For convenience, the processing subject will be described as the control unit 10 below. The control unit 10 acquires the position of the host vehicle 100 (S11), and acquires the vehicle speed or shift information of the host vehicle 100 (S12). The control unit 10 determines whether or not the shift position (shift position) has changed from the forward position to the reverse position (S13).

  When the shift position has not changed from the forward position to the reverse position (NO in S13), the control unit 10 determines that the vehicle speed is equal to or longer than a predetermined time (for example, about 1 to 5 seconds) and a lower limit value (for example, 10 km / h). It is determined whether or not the following has occurred (S14). When the vehicle speed is not less than the predetermined time and not more than the lower limit value (YES in S14), the control unit 10 acquires peripheral information from the external sensor (S15). The surrounding information includes, for example, a determination result of whether or not an oncoming vehicle exists, a determination result of whether or not the oncoming vehicle is large, a specific result such as a road width and a vehicle width of the oncoming vehicle.

  When the shift position changes from the forward position to the reverse position (YES in S13), the control unit 10 performs the process of step S15 without performing the process of step S14. The control unit 10 determines whether or not a caution event (including an oncoming vehicle) has been detected (S16). If a caution event is detected (YES in S16), the control unit 10 generates oncoming vehicle caution information (attention information) ( S17). The oncoming vehicle warning information includes the fact that there is a large oncoming vehicle and the position of the host vehicle 100 (the position of the oncoming vehicle may be used).

  The control unit 10 determines whether or not there is a rear vehicle capable of inter-vehicle communication (S18), and when there is a rear vehicle (YES in S18), transmits oncoming vehicle warning information to the rear vehicle (S19). The oncoming vehicle caution information is transmitted to the server 200 (S20), and the process is terminated. When there is no rear vehicle capable of inter-vehicle communication (NO in S18), the control unit 10 performs the process of step S20 without performing the process of step S19.

  If the vehicle speed is not less than the predetermined time and not lower than the lower limit (NO in S14), or if no caution event is detected (NO in S16), the control unit 10 ends the process.

  FIG. 6 is a flowchart showing a second example of the processing procedure by the in-vehicle device 50 of the present embodiment. The control unit 10 acquires road information (S31), acquires the position of the host vehicle 100 (S32), and determines whether the host vehicle 100 is traveling on a specific road (S33). The specific road is, for example, a road without a signal over a required distance, a road with many curves, a road with a narrow road width, or the like.

  When the host vehicle 100 is traveling on a specific road (YES in S33), the control unit 10 acquires the vehicle speed or shift information of the host vehicle 100 (S34). The control unit 10 determines whether or not the shift position (shift position) has changed from the forward position to the reverse position (S35).

  When the shift position has not changed from the forward position to the reverse position (NO in S35), the control unit 10 determines that the vehicle speed is equal to or longer than a predetermined time (for example, about 1 to 5 seconds) and a lower limit value (for example, 10 km / h). It is determined whether or not the following has occurred (S36). When the vehicle speed is not less than the predetermined time and not more than the lower limit value (YES in S36), the control unit 10 acquires peripheral information from the external sensor (S37). The surrounding information includes, for example, a determination result of whether or not an oncoming vehicle exists, a determination result of whether or not the oncoming vehicle is large, a specific result such as a road width and a vehicle width of the oncoming vehicle.

  When the shift position changes from the forward position to the reverse position (YES in S35), the control unit 10 performs the process of step S37 without performing the process of step S36. The control unit 10 determines whether or not a caution event (including an oncoming vehicle) has been detected (S38). If a caution event is detected (YES in S38), the control unit 10 generates oncoming vehicle caution information (attention information) ( S39).

  The control unit 10 determines whether or not there is a rear vehicle capable of inter-vehicle communication (S40), and when there is a rear vehicle (YES in S40), transmits oncoming vehicle warning information to the rear vehicle (S41). The oncoming vehicle caution information is transmitted to the server 200 (S42), and the process is terminated. When there is no rear vehicle capable of inter-vehicle communication (NO in S40), the control unit 10 performs the process of step S42 without performing the process of step S41.

  When the host vehicle 100 is not traveling on a specific road (NO in S33), the vehicle speed is not less than the predetermined time and not lower than the lower limit (NO in S36), or no caution event is detected (S38). NO), the control unit 10 ends the process.

  FIG. 7 is a flowchart showing a third example of the processing procedure by the in-vehicle device 50 of the present embodiment. In the example of FIG. 7, when a forward vehicle is present in front of the host vehicle 100, the forward vehicle generates oncoming vehicle warning information. The control unit 10 determines whether or not there is a forward vehicle capable of inter-vehicle communication (S51), and when there is a forward vehicle (YES in S51), the oncoming vehicle caution information is received from the forward vehicle (S52). .

  When there is no forward vehicle capable of inter-vehicle communication (NO in S51), the control unit 10 determines whether or not oncoming vehicle warning information has been received from the server 200 (S53). When the oncoming vehicle caution information is not received from the server 200 (NO in S53), the control unit 10 continues the processing from step S51. When the oncoming vehicle warning information is received from the server 200 (YES in S53), the control unit 10 performs a process of step S54 described later.

  The control unit 10 provides oncoming vehicle caution information to the driver using the HUD 6 (S54), and determines whether there is a rear vehicle capable of inter-vehicle communication (S55). If there is a rear vehicle (YES in S55), the control unit 10 transmits the received oncoming vehicle caution information to the rear vehicle (S56), and the process ends. When there is no rear vehicle capable of inter-vehicle communication (NO in S55), the control unit 10 ends the process without performing the process of step S56.

  The in-vehicle device 50 according to the present embodiment can be realized using a general-purpose computer including a CPU (processor), a RAM, and the like. That is, as shown in FIGS. 5, 6, and 7, a computer program that defines the procedure of each process is loaded into a RAM provided in the computer, and the computer program is executed by a CPU (processor). Thus, the in-vehicle device 50 can be realized.

  According to the in-vehicle device 50 of the present embodiment, for example, when traveling on a road where there are many curves and there are many places where the forward visibility is a blind spot, it is difficult to pass and a collision accident or a contact accident occurs. Before entering the driver's field of view, an oncoming vehicle (especially a large oncoming vehicle) that is likely to be approaching from the front in the direction of travel is known and alerted in advance. Contact accidents can be prevented.

  Further, according to the in-vehicle device 50 of the present embodiment, the presence / absence of a caution event is determined based on the behavior of the vehicle (for example, shift operation, brake operation, etc.). , It is not necessary to set in advance a section that is difficult to pass.

  In the above-described embodiment, the oncoming vehicle has been described as the attention event related to traffic. However, this embodiment is not limited to the oncoming vehicle, but may include an event such as a motorcycle, a pedestrian, or road construction. Can be applied.

  The disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Communication Line 2 Brake Control Device 3 External Sensor 4 Transmission Controller 5 Navigation Device 6 HUD
10 Control unit 11 Interface unit 12 GPS
DESCRIPTION OF SYMBOLS 13 Determination part 14 Generation | occurrence | production part 15 Storage part 16 1st communication part 17 2nd communication part 18 Road determination part 19 Travel direction determination part 50 Car-mounted apparatus 100 Own vehicle 110 Oncoming vehicle 120, 130 Rear vehicle 140 Front vehicle

Claims (10)

An in-vehicle device mounted on a vehicle,
A position acquisition unit for acquiring the position of the host vehicle;
A determination unit for determining presence or absence of an attention event related to traffic on the road;
When the determination unit determines that there is a caution event, based on the position acquired by the position acquisition unit, a generation unit that generates the caution information including the presence of the caution event and the position of the caution event,
A vehicle-mounted device comprising: a transmitter that transmits the attention information generated by the generator to a rear vehicle. A shift position acquisition unit for acquiring a shift position of the transmission of the host vehicle;
The determination unit
The in-vehicle device according to claim 1, wherein when the shift position is changed from the forward position to the reverse position, it is determined that there is a caution event. It has a vehicle speed acquisition unit that acquires the vehicle speed of its own vehicle,
The determination unit
The in-vehicle device according to claim 1 or 2, wherein when the vehicle speed of the host vehicle is changed from a speed equal to or higher than a predetermined speed to a speed equal to or lower than a predetermined lower limit value during a predetermined time, it is determined that there is a caution event. It has an external sensor that acquires the surrounding information of the vehicle,
The determination unit
The in-vehicle device according to any one of claims 1 to 3, wherein it is determined that there is a caution event based on peripheral information acquired by the external sensor. A road information acquisition unit for acquiring road information;
A road determination unit that determines whether the road on which the vehicle travels is a specific road based on the road information acquired by the road information acquisition unit,
The determination unit
The in-vehicle device according to any one of claims 1 to 4, wherein when the road on which the host vehicle travels is a specific road, it is determined that there is a caution event. A vehicle-to-vehicle communication determination unit that determines whether vehicle-to-vehicle communication is possible with a rear vehicle,
The transmitter is
The in-vehicle device according to any one of claims 1 to 5, wherein the caution information is transmitted to a rear vehicle determined to be capable of inter-vehicle communication by the inter-vehicle communication determination unit. A host vehicle traveling direction acquisition unit that acquires a traveling direction of the host vehicle;
A rear vehicle traveling direction acquisition unit for acquiring a traveling direction of the rear vehicle;
A traveling direction determination unit that determines whether the traveling direction of the host vehicle and the traveling direction of the rear vehicle are within a predetermined range;
The transmitter is
The in-vehicle device according to any one of claims 1 to 6, wherein the caution information is transmitted to a rear vehicle determined by the traveling direction determination unit as being within a predetermined range. It has a receiver that receives caution information from the vehicle ahead,
The transmitter is
The in-vehicle device according to any one of claims 1 to 7, wherein when the attention information is received by the receiving unit, the received attention information is transmitted to a rear vehicle. A computer program for causing a computer to provide caution information,
Computer
A position acquisition unit for acquiring the position of the host vehicle;
A determination unit for determining presence or absence of an attention event related to traffic on the road;
When it is determined that there is the attention event, based on the acquired position of the own vehicle, a generation unit that generates the attention information including the presence of the attention event and the position of the attention event,
A computer program that functions as an output unit that outputs generated attention information to the vehicle behind you. A method for providing caution information by an in-vehicle device mounted on a vehicle,
The position acquisition unit acquires the position of the vehicle,
The determination unit determines the presence or absence of caution events related to road traffic,
When it is determined that there is the attention event, the generation unit generates attention information including the presence of the attention event and the position of the attention event based on the acquired position of the host vehicle.
A caution information providing method in which the transmitter transmits the generated caution information to the rear vehicle.

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