JP7108899B2 - Pedestrian terminal device, in-vehicle terminal device, inter-pedestrian communication system, and getting-off notification method - Google Patents

Description

The present invention relates to a pedestrian terminal device carried by an occupant of a vehicle, an in-vehicle terminal device mounted in a vehicle, a pedestrian-to-vehicle communication system for performing inter-vehicle communication between the pedestrian terminal device and the in-vehicle terminal device, and a pedestrian terminal device. The present invention relates to a getting-off notification method for notifying an in-vehicle terminal device that an occupant has gotten off from a vehicle.

When an occupant exits a stopped vehicle, if there is another vehicle approaching from behind, an accident may occur in which the other vehicle collides with the alighting occupant.

In order to prevent such an accident in which another vehicle collides with an occupant who is getting off the vehicle, conventionally, the occupant of a stopped vehicle has unbuckled the seat belt or touched the door handle. A technology is known in which an on-vehicle terminal of a stopped vehicle transmits a notification that an occupant is getting off the vehicle to an on-vehicle terminal of another vehicle through vehicle-to-vehicle communication by detecting motion (see Patent Document 1). .

JP 2008-158578 A

However, in the above-described conventional technology, the notification that the occupant is getting off the vehicle is made through inter-vehicle communication. However, there is a problem that it is not possible to notify that the occupant is getting off the vehicle.

In addition, in the conventional technology, it is necessary to provide the vehicle with a sensor for detecting that the seat belt buckle has been unbuckled and a sensor for detecting that the door handle has been touched by a hand. In a vehicle that is not equipped with this system, there is a problem that it is not possible to detect the movement of the passenger to get off the vehicle and notify that the vehicle is getting off.

Therefore, the present invention can notify the driver of a vehicle not equipped with an in-vehicle terminal device having a vehicle-to-vehicle communication function that the passenger is getting off the vehicle, and furthermore, can notify the driver of the vehicle that the passenger is getting off the vehicle. A pedestrian terminal device, an in-vehicle terminal device, an inter-pedestrian communication system, and a getting-off notification capable of notifying drivers of surrounding vehicles that a passenger is getting off without providing a sensor for detection on the vehicle The main purpose is to provide a method.

The pedestrian terminal device of the present invention is a pedestrian terminal device carried by a vehicle occupant, and includes a positioning unit that acquires position information of the device itself, and vehicle-to-pedestrian communication with in-vehicle terminal devices mounted on surrounding vehicles. a vehicle-to-pedestrian communication unit, a detection unit that detects a state that changes according to the movement of an occupant who owns the device to get off the vehicle, and a detection unit that detects the movement of the occupant to get off the vehicle based on the detection result of the detection unit; a controller for transmitting a get-off message from the pedestrian-to-vehicle communication unit to the in-vehicle terminal device, wherein the control unit responds to a get-off message from another pedestrian terminal device to the in-vehicle terminal device When the vehicle-to-pedestrian communication unit receives the response message transmitted from the vehicle within a predetermined time, the get-off message is not transmitted even when the occupant carrying the own device gets off the vehicle .

Further, the in-vehicle terminal device of the present invention is an in-vehicle terminal device mounted on a vehicle, and includes a position information acquisition unit that acquires position information of the own device, a pedestrian terminal device possessed by an occupant of another vehicle, and a walker. A vehicle-to-pedestrian communication unit that communicates with the vehicle-to-pedestrian communication unit, and when the vehicle-to-pedestrian communication unit receives a get-off message from the pedestrian terminal device indicating that an occupant is getting off from another vehicle, control to call attention to the driver of the own vehicle. wherein, when receiving the get-off message, the control unit receives, within a predetermined time, a get-off message from another pedestrian terminal device different from the pedestrian terminal device that sent the get-off message. If the pedestrian terminal device that sent the get-off message received this time is more dangerous than the other pedestrian terminal device, the driver of the vehicle is alerted. A configuration without

Further, a pedestrian-to-vehicle communication system of the present invention is a pedestrian-to-vehicle communication system for performing inter-pedestrian communication between a pedestrian terminal device carried by a vehicle occupant and an in-vehicle terminal device mounted on a vehicle. The user terminal device includes a positioning unit that acquires position information of the own device, a pedestrian-to-vehicle communication unit that performs inter-pedestrian communication with the in-vehicle terminal device, and detects a state that changes according to the movement of a passenger carrying the device to exit the vehicle. and a control unit for transmitting a get-off message indicating that the occupant is getting off the vehicle from the vehicle-to-pedestrian communication unit to the in-vehicle terminal device when the occupant's getting off operation is detected based on the detection result of the detecting unit. and a vehicle-to-pedestrian communication unit for performing vehicle-to-pedestrian communication with the pedestrian terminal device; a control unit that alerts the driver of the vehicle when received from the pedestrian terminal device by the unit, and the control unit of the pedestrian terminal device responds to a get-off message of another pedestrian terminal device When the vehicle-to-pedestrian communication unit receives the response message transmitted from the in-vehicle terminal device within a predetermined time, the get-off message is not transmitted even when the passenger carrying the device is detected to get off the vehicle .

Further, a getting-off notification method of the present invention is a getting-off notification method for notifying an in-vehicle terminal device mounted on a vehicle that a passenger gets off from a pedestrian terminal device possessed by a passenger of the vehicle, wherein the pedestrian terminal device detects a state that changes according to the occupant's dismounting motion, and detects the occupant's disembarking motion based on the detection result, the disembarking message indicating that the occupant is getting off is When the message is transmitted to the in-vehicle terminal device by pedestrian-to-vehicle communication, and the in-vehicle terminal device receives the exit message from the pedestrian terminal device, the driver of the own vehicle is alerted, and the pedestrian terminal device When a response message transmitted from the in-vehicle terminal device in response to the get-off message of the pedestrian terminal device is received within a predetermined time, the get-off message is not transmitted even when an occupant carrying the own device gets off the vehicle is detected . Configuration.

According to the present invention, since a get-off message indicating that the passenger is getting off the vehicle is transmitted to the vehicle-mounted terminal device by pedestrian-to-vehicle communication, the driver of the vehicle that does not have the vehicle-mounted terminal device equipped with the function of vehicle-to-vehicle communication. can also be notified that the occupant is getting off the vehicle. Furthermore, since the motion of the occupant to get off the vehicle is detected based on the detection result of the detection unit provided in the pedestrian terminal device, the occupant is able to It is possible to notify the drivers of vehicles in the vicinity that the In addition, according to the present invention, in the case of getting off the vehicle without danger, there is no need to notify the drivers of the surrounding vehicles that the occupants are getting off, so unnecessary messages are prevented from being sent. can be avoided.

1 is an overall configuration diagram of a pedestrian-to-vehicle communication system according to a first embodiment; FIG. Explanatory diagram showing an overview of the operation of the pedestrian-to-vehicle communication system according to the first embodiment. A block diagram showing a schematic configuration of a pedestrian terminal 1 and an in-vehicle terminal 3 according to the first embodiment. Explanatory diagram showing detection means and detection contents of the pedestrian terminal 1 according to the first embodiment Explanatory drawing showing an example of a warning screen displayed on the car navigation device 4 according to the first embodiment. Flow diagram showing operation procedures of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the first embodiment A block diagram showing a schematic configuration of a pedestrian terminal 1 and an in-vehicle terminal 3 according to a second embodiment. Flow diagram showing operation procedures of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the second embodiment FIG. 4 is a sequence diagram showing operation procedures of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the first embodiment and the third embodiment when passengers get off the vehicle at the same time; A block diagram showing a schematic configuration of a pedestrian terminal 1 and an in-vehicle terminal 3 according to a third embodiment. Flow diagram showing operation procedures of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the third embodiment A sequence diagram showing an operation procedure of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the modification of the third embodiment. Explanatory diagram showing message transmission status according to the fourth embodiment Block diagram showing a schematic configuration of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the fourth embodiment Flow diagram showing operation procedures of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the fourth embodiment Block diagram showing a schematic configuration of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the fifth embodiment Flow diagram showing the operation procedure of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the fifth embodiment

A first invention made to solve the above problems is a pedestrian terminal device possessed by a vehicle occupant, which includes a positioning unit for acquiring position information of the own device and an in-vehicle terminal mounted on a surrounding vehicle. A pedestrian-to-vehicle communication unit that performs inter-pedestrian communication with the device, a detection unit that detects a state that changes according to the movement of a passenger carrying the device to exit the vehicle, and a detection of the passenger's exit operation based on the detection result of this detection unit. a controller for transmitting a get-off message indicating that the occupant is getting off from the pedestrian-to-vehicle communication unit to the in-vehicle terminal device, wherein the controller transmits the get-off message to another pedestrian terminal device. When the vehicle-to-pedestrian communication unit receives a response message transmitted from the in-vehicle terminal device in response to the response within a predetermined period of time, the get-off message is not transmitted even when the occupant carrying the device is detected to get off the vehicle . .

According to this, since a get-off message indicating that the occupant is getting off the vehicle is sent to the in-vehicle terminal device via inter-pedestrian communication, even the driver of the vehicle that does not have an in-vehicle terminal device equipped with inter-vehicle communication functions can , can be notified that the occupant is disembarking. Furthermore, since the motion of the occupant to get off the vehicle is detected based on the detection result of the detection unit provided in the pedestrian terminal device, the occupant is able to It is possible to notify the drivers of vehicles in the vicinity that the In addition, according to this, in the case of alighting without danger, there is no need to notify the drivers of the surrounding vehicles that the occupants are getting off, so it is possible to avoid sending unnecessary messages. can be done.

A second aspect of the invention is configured such that the detection unit is an acceleration sensor and a gyro sensor.

According to this, it is possible to accurately detect the movement of the passenger to get off the vehicle based on the position information obtained by the positioning unit, the acceleration obtained by the acceleration sensor, and the angular velocity obtained by the gyro sensor.

According to this, it is possible to prompt the occupant to pay attention to the approaching vehicle.

According to this, it is possible to avoid unnecessary calling of attention to the passenger.

According to this, when a plurality of passengers get off from different vehicles in a short period of time, duplicate get-off messages are sent, so that the in-vehicle terminal unit continuously alerts the driver. can be avoided.

In a third aspect of the invention, the control unit retains its own device even when the pedestrian-vehicle communication unit receives the response message corresponding to the get-off message of the other pedestrian terminal device within a predetermined time. If the occupant is at a higher risk than the other occupant possessing the other pedestrian terminal device, the get-off message is transmitted.

According to this, when the occupant who started getting off the vehicle later is in higher risk, the attention of the occupant in higher risk can be urged by calling the driver's attention again.

In a fourth aspect of the invention, when the control unit is closer to the in-vehicle terminal device than the another pedestrian terminal device and the device is located in the same lane as the another pedestrian terminal device In (1), it is determined that the occupant who owns the device is more dangerous than the other occupant.

According to this, it is possible to accurately determine the risk of the passenger getting off the vehicle.

A fifth aspect of the present invention is an in-vehicle terminal device mounted in a vehicle, which includes a position information acquiring unit for acquiring position information of the own device, a pedestrian terminal device possessed by an occupant of another vehicle, and pedestrian-to-vehicle communication. and a control unit for alerting the driver of the own vehicle when the inter-pedestrian communication unit receives a get-off message from the pedestrian terminal device indicating that a passenger is getting off from another vehicle. wherein, when receiving the get-off message, the control unit receives, within a predetermined time, a get-off message from another pedestrian terminal device different from the pedestrian terminal device that sent the get-off message. is configured not to call attention to the driver of the own vehicle unless the pedestrian terminal device that sent the exit message received this time is more dangerous than the other pedestrian terminal device. and

According to this, it is possible to notify the driver of a vehicle that is not equipped with an in-vehicle terminal device having an inter-vehicle communication function that the occupant is getting off from another vehicle. In addition, according to this, in the case of alighting without danger, there is no need to notify the drivers of the surrounding vehicles that the occupants are getting off, so it is possible to avoid sending unnecessary messages. can be done.

In a sixth aspect of the present invention, the control unit determines that the pedestrian terminal device that is the transmission source of the getting-off message received this time is closer to the own device than the other pedestrian terminal device and is in the same lane as the own device. If so, it is determined that the pedestrian terminal device from which the get-off message received this time is more dangerous than the other pedestrian terminal device.

According to this, it is possible to accurately determine the risk of the passenger getting off the vehicle.

A seventh invention is a pedestrian-to-vehicle communication system for performing inter-pedestrian communication between a pedestrian terminal device carried by a vehicle occupant and an in-vehicle terminal device mounted on a vehicle, wherein the pedestrian terminal device includes a positioning unit that acquires position information of the device itself, a vehicle-to-pedestrian communication unit that performs inter-pedestrian communication with the in-vehicle terminal device, and a detection unit that detects a state that changes according to the movement of a passenger carrying the device to get off the vehicle. and a control unit for transmitting a get-off message indicating that the occupant is getting off the vehicle from the inter-pedestrian-vehicle communication unit to the in-vehicle terminal device when the occupant's getting off motion is detected based on the detection result of the detection unit. The in-vehicle terminal device includes a position information acquisition unit that acquires position information of its own device, a pedestrian-to-vehicle communication unit that performs inter-pedestrian communication with the pedestrian terminal device, and a pedestrian-to-vehicle communication unit that transmits the get-off message to the pedestrian-to-vehicle communication unit. a control unit for alerting the driver of the own vehicle when received from the pedestrian terminal device, the control unit of the pedestrian terminal device responding to a get-off message of another pedestrian terminal device, the in-vehicle terminal device When the vehicle-to-pedestrian communication unit receives a response message transmitted from the device within a predetermined time, the get-off message is not transmitted even when the passenger carrying the device is detected to get off the vehicle .

According to this, as in the first invention, it is possible to notify the driver of a vehicle not equipped with an in-vehicle terminal having an inter-vehicle communication function that the occupant is getting off the vehicle, and further, Even if the vehicle is not provided with a sensor for detecting the passenger's getting off operation, the driver of the surrounding vehicle can be notified that the passenger is getting off. In addition, according to this, in the case of alighting without danger, there is no need to notify the drivers of the surrounding vehicles that the occupants are getting off, so it is possible to avoid sending unnecessary messages. can be done.

An eighth invention is a getting-off notification method for notifying an in-vehicle terminal device mounted on a vehicle of a passenger getting off from a pedestrian terminal device possessed by an occupant of the vehicle, the pedestrian terminal device comprising: When detecting a state that changes according to the movement of the passenger getting off the vehicle, and detecting the movement of the passenger carrying the device to get off the vehicle based on the detection result, a get-off message indicating that the passenger is getting off the vehicle is displayed between the pedestrian and the vehicle. When the on-vehicle terminal device receives the get-off message from the pedestrian terminal device, the driver of the vehicle is alerted, and the pedestrian terminal device receives another walking message. When a response message transmitted from the in-vehicle terminal device in response to the get-off message of the passenger terminal device is received within a predetermined period of time, the get-off message is not transmitted even when the passenger carrying the device is detected to get off the vehicle. do.

According to this, as in the first invention, it is possible to notify the driver of a vehicle not equipped with an in-vehicle terminal having an inter-vehicle communication function that the occupant is getting off the vehicle, and further, Even if the vehicle is not provided with a sensor for detecting the passenger's getting off operation, the driver of the surrounding vehicle can be notified that the passenger is getting off. In addition, according to this, in the case of alighting without danger, there is no need to notify the drivers of the surrounding vehicles that the occupants are getting off, so it is possible to avoid sending unnecessary messages. can be done.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an overall configuration diagram of a pedestrian-to-vehicle communication system according to the first embodiment.

This pedestrian-to-vehicle communication system includes a pedestrian terminal 1 and a mobile information terminal 2 carried by a vehicle occupant, an in-vehicle terminal 3 and a car navigation device 4 mounted in the vehicle. Pedestrian-vehicle communication is performed with the terminal 3 .

In this pedestrian-to-vehicle communication system, a message containing required information such as position information is transmitted and received between the pedestrian terminal 1 and the vehicle-mounted terminal 3 . Transmission and reception of this message uses the frequency band (for example, 700 MHz band or 5.8 GHz band) adopted by the ITS wireless communication, that is, the safe driving support wireless system using ITS (Intelligent Transport System). It is performed by wireless communication.

A pedestrian terminal 1 is connected to a mobile information terminal 2 . This portable information terminal 2 is a smart phone, a mobile phone, a tablet terminal, a wearable terminal, or the like. The pedestrian terminal 1 sends and receives a message to and from the in-vehicle terminal 3, and when it is determined that it is necessary to call attention, it outputs an instruction to call attention to the mobile information terminal 2. In response to the instruction from 1, it performs an output operation (for example, voice output, vibration, etc.) to call attention to the occupant.

The in-vehicle terminal 3 is connected to the car navigation device 4 . This car navigation device 4 provides route guidance to the driver. The in-vehicle terminal 3 sends and receives a message to and from the pedestrian terminal 1, and if it determines that it is necessary to call attention, it outputs an instruction to call attention to the car navigation device 4, and the car navigation device 4 outputs an instruction to call attention to the in-car terminal 3. In response to the instruction from, an output operation (for example, voice output, screen display, etc.) for alerting the driver is performed.

The pedestrian terminal 1 may be built in the portable information terminal 2 and the in-vehicle terminal 3 may be built in the car navigation device 4 .

Moreover, the pedestrian terminal 1 itself may perform the output operation of alerting. In addition, the in-vehicle terminal 3 itself may perform the output operation of alerting. Also, the in-vehicle terminal 3 may communicate with the mobile information terminal 2 carried by the driver, and cause the mobile information terminal 2 to perform an output operation for alerting the driver.

Next, an overview of the operation of the pedestrian-to-vehicle communication system according to the first embodiment will be described. FIG. 2 is an explanatory diagram showing an outline of the operation of the inter-pedestrian communication system.

In the example shown in FIG. 2, an occupant riding in vehicle C1 is about to get off. On the other hand, there is a vehicle C2 running in the same lane behind the vehicle C1, and there is a risk that the vehicle C2 will collide with an occupant getting off the vehicle C1. Therefore, in this embodiment, the driver of the vehicle C2 is notified that the occupant is getting off the vehicle C1 ahead. In addition, the passenger who is getting off the vehicle is also notified that there is an approaching vehicle.

Specifically, first, when the pedestrian terminal 1 carried by the passenger detects that the passenger is getting off the vehicle, the pedestrian terminal 1 sends a message (getting off message) containing information about the getting off operation indicating that the passenger is getting off the vehicle through inter-vehicle communication. Send by broadcast.

When the vehicle-mounted terminal 3 receives the get-off message transmitted from the pedestrian terminal 1, the vehicle-mounted terminal 3 broadcasts a message (response message) including response information corresponding to the get-off operation information of the get-off message by inter-vehicle communication. Also, the driver of the host vehicle is alerted to the passengers getting off from the vehicle in front.

When the pedestrian terminal 1 receives the response message transmitted from the on-vehicle terminal 3, the pedestrian terminal 1 determines the risk of collision between the passenger getting off the vehicle and the vehicle of the on-board terminal 3. If there is a risk of collision, the pedestrian terminal 1 A warning is issued to an occupant carrying the device to warn the approaching vehicle.

At this time, when the pedestrian terminal 1 is located in the same lane as the in-vehicle terminal 3 and the pedestrian terminal 1 is located in front of the in-vehicle terminal 3 in the direction of travel of the vehicle, it is determined that there is a risk of collision. do. Therefore, in the example shown in FIG. 2, the vehicle C2 is determined to be dangerous, but the vehicle C3, which is ahead and does not advance in the direction of the pedestrian terminal 1, and the pedestrian terminal 1 and the lane are In the case of a different vehicle C4, it is determined that there is no danger.

Also, in this embodiment, it is determined in which direction the occupant exits the vehicle, left or right, and based on the exit direction and the lane in which the occupant is located, it is determined whether or not the exit is dangerous.

At this time, which direction is dangerous to get off depends on the road conditions. For example, on a road with one lane on each side, or on a road with two or more lanes on one side, if the vehicle is stopped in the lane closest to the sidewalk (road shoulder), it is dangerous to get off on the sidewalk side ( Alighting on the side of the road is not dangerous. On the other hand, on a road with two or more lanes on one side, if the vehicle is stopped in a lane other than the one closest to the sidewalk (road shoulder), getting off in either direction is dangerous.

Therefore, in the example shown in FIG. 2, it is dangerous to get off the vehicle C1, which is stopped in the lane closest to the sidewalk (road shoulder), toward the roadway, but it is dangerous to get off onto the sidewalk (road shoulder). is not.

Next, schematic configurations of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the first embodiment will be described. FIG. 3 is a block diagram showing a schematic configuration of the pedestrian terminal 1 and the vehicle-mounted terminal 3. As shown in FIG.

The pedestrian terminal 1 includes a positioning unit 11 , a detection unit 12 , a vehicle-pedestrian communication unit 13 , an input/output unit 14 , a control unit 15 and a storage unit 16 .

The positioning unit 11 acquires position information of its own device by a satellite positioning system such as GPS (Global Positioning System). It should be noted that the positioning function of the mobile information terminal 2 may be used to acquire the position information of the own device.

The detection unit 12 detects the state of the occupant and the state of the occupant's surroundings that change according to the movement of the occupant who has the device to get off the vehicle. , an illuminance sensor 25 , an atmospheric pressure sensor 26 , a magnetic sensor 27 , a proximity sensor 28 and a microphone 29 .

The pedestrian-to-vehicle communication unit 13 transmits and receives messages to and from the in-vehicle terminal 3 through pedestrian-to-vehicle communication. In this pedestrian-to-vehicle communication, radio communication is performed using the frequency band adopted by the safe driving support radio system using ITS.

The input/output unit 14 inputs and outputs information to and from the portable information terminal 2 .

The storage unit 16 stores map information, a program executed by a processor constituting the control unit 15, and the like. Note that the map information may be acquired from the mobile information terminal 2 .

The control unit 15 includes a message control unit 31 , a lane detection unit 32 , a vehicle exit operation detection unit 33 , a danger determination unit 34 , and a warning control unit 35 . The control unit 15 is configured by a processor, and each unit of the control unit 15 is realized by executing a program stored in the storage unit 16 by the processor.

The message control unit 31 broadcasts a message including pedestrian information such as a terminal ID and position information from the pedestrian-to-vehicle communication unit 13 . In the present embodiment, the inter-pedestrian communication unit 13 transmits a message (get-off message) including information about getting off the vehicle indicating that the occupant is getting off the vehicle, in addition to the pedestrian information.

The lane detection unit 32 detects the lane in which the device is located based on the position information acquired by the positioning unit 11 and the map information stored in the storage unit 16 .

Alighting operation detection unit 33 is based on the position information acquired by positioning unit 11, the detection information acquired by detection unit 12, the lane information acquired by lane detection unit 32, and the map information stored in storage unit 16. Then, it detects the movement of the occupant carrying the device to get off the vehicle, and determines the danger of the movement of getting off the vehicle.

Based on the location information and lane information of the other vehicle and the location information and lane information of the own device included in the response message received from the vehicle-mounted terminal 3 by the pedestrian-to-vehicle communication unit 13, the danger determination unit 34 determines whether the occupant of the own device and other vehicles. Specifically, when the in-vehicle terminal 3, which is the transmission source of the response message, is in the same lane as its own device and is located in front of another vehicle in the direction of travel, it is determined that there is a risk of collision. judge.

When the pedestrian-to-vehicle communication unit 13 receives a response message transmitted from the vehicle-mounted terminal 3 in response to the exit message, and the risk determination unit 34 determines that there is a risk of collision, the alert control unit 35 , to call attention to the passenger who owns the device. In this embodiment, an instruction to call attention to the pedestrian is output to the mobile information terminal 2 via the input/output unit 14, and in response to this instruction, the mobile information terminal 2 performs an output operation (for example, voice output) to alert the pedestrian. and vibration) are performed.

The vehicle-mounted terminal 3 includes a positioning unit 41 , an inter-pedestrian vehicle communication unit 42 , an input/output unit 43 , a control unit 44 , and a storage unit 45 .

The positioning unit 41 acquires position information of its own device by a satellite positioning system such as GPS (Global Positioning System). It should be noted that the positioning function of the car navigation device 4 may be used to acquire the position information of the device itself.

The pedestrian-to-vehicle communication unit 42 transmits and receives messages to and from the pedestrian terminal 1 through pedestrian-to-vehicle communication. In this pedestrian-to-vehicle communication, radio communication is performed using the frequency band adopted by the safe driving support radio system using ITS.

The input/output unit 43 inputs and outputs information to and from the car navigation device 4 .

The storage unit 45 stores map information, a program executed by a processor constituting the control unit 44, and the like. Note that the map information may be acquired from the car navigation device 4 .

The control unit 44 includes a message control unit 51 and an alerting control unit 52 . The control unit 44 is configured by a processor, and each unit of the control unit 44 is realized by executing a program stored in the storage unit 45 by the processor.

The message control unit 51 broadcasts a message including vehicle information such as a terminal ID and position information from the pedestrian-to-vehicle communication unit 42 . In the present embodiment, in response to the get-off message received from the pedestrian terminal 1 by the pedestrian-to-vehicle communication unit 42, the pedestrian-to-vehicle communication unit 42 transmits a message (response message) including response information to the get-off operation information included in the get-off message. do.

When the vehicle-to-pedestrian communication unit 42 receives the get-off message from the pedestrian terminal 1, the alert control unit 52 alerts the driver of the own vehicle. In this embodiment, an instruction to call attention is output to the car navigation device 4 via the input/output unit 43, and in response to this instruction, the car navigation device 4 performs an output operation (e.g., voice output) to call attention to the driver. and screen display) are performed.

Next, the points of lane detection and exit motion detection performed by the pedestrian terminal 1 according to the first embodiment will be described. FIG. 4 is an explanatory diagram showing detection means and detection contents.

The lane detection unit 32 of the pedestrian terminal 1 determines the lane in which the passenger is located by comparing and collating the position information of the own device acquired by the positioning unit 11 and the map information. At this time, it is preferable to determine the traveling direction of the vehicle based on the history of the position information, and to determine the lane in consideration of the traveling direction.

Based on the position information of the own device acquired by the positioning unit 11 and the information detected by various detection means provided in the detection unit 12, the exit motion detection unit 33 of the pedestrian terminal 1 detects the occupant carrying the device. to detect the motion of getting off the vehicle.

Here, in detecting the operation of getting off the vehicle, first, it is detected that the person carrying the device is getting into the vehicle. At this time, by comparing the positional information acquired by the positioning unit 11 with the map information, it may be determined that the device is located on the roadway. Also, walking and riding may be determined based on the speed measured from the history of position information.

When the occupant gets off the vehicle, the occupant stands up from the seat and tries to move out of the vehicle. At this time, the movement of standing up from the seat or moving sideways is determined by the detection values of the acceleration sensor 21 and the gyro sensor 22. Thus, it is possible to detect the motion of the passenger to get off the vehicle.

In addition, when the passenger opens the door, the situation around the passenger changes, and the detection values of the temperature sensor 23, humidity sensor 24, illuminance sensor 25, atmospheric pressure sensor 26, magnetic sensor 27, and proximity sensor 28 exceed a predetermined value. big change appears. Therefore, by determining that the door has been opened based on the detection values of these sensors, it is possible to detect the movement of the passenger to exit the vehicle.

When the passenger opens the door, the microphone 29 picks up the opening and closing sound of the door and the sound outside the vehicle. Therefore, by determining that the door has been opened based on the sound picked up by the microphone 29, it is possible to detect the passenger's exiting motion.

In this way, the position information of the positioning unit 11 and the acceleration sensor 21, the gyro sensor 22, the temperature sensor 23, the humidity sensor 24, the illuminance sensor 25, the atmospheric pressure sensor 26, the magnetic sensor 27, the proximity sensor 28, and the microphone of the detection unit 12 are combined. It is possible to detect the movement of the passenger to get off the vehicle based on the detection information of 29. By performing determination by combining several pieces of this information, highly accurate detection becomes possible.

Further, the getting-off operation detection unit 33 determines in which direction the occupant exits the vehicle, left or right, based on the information detected by various detection means provided in the detection unit 12. Based on the lane in which is located, it is determined whether or not there is a risk of getting off.

Here, the traveling direction of the vehicle is discriminated from the history of the position information, and based on the traveling direction and the detection values of the acceleration sensor 21 and the gyro sensor 22, which direction the occupant moved to the left or right with respect to the traveling direction is determined. By determining , it is possible to determine the exit direction of the occupant, that is, which direction the occupant is going to get off the vehicle, left or right.

In the case of a bus passenger, the passenger's getting off operation may be detected by moving toward the exit after the bus stops.

Also, based on the position information of the positioning unit 11 and the detection information of the detection unit 12, it may be determined whether the occupant is inside or outside the vehicle, and the information may be added to the getting-off message.

Further, in the present embodiment, the motion of getting off the vehicle is detected based only on the information collected by the pedestrian terminal 1 itself. By performing inter-vehicle communication, it is also possible to detect the operation of getting off the vehicle based on the information acquired from the in-vehicle terminal 3 . Also, the information collected by the pedestrian terminal 1 and the information acquired from the vehicle-mounted terminal 3 may be combined to detect the movement of getting off the vehicle.

In this case, there are sensors that detect the opening and closing of the doors, sensors that detect when a hand touches the door handle, sensors that detect the load of the occupant sitting in the seat, and sensors that detect the release of the seatbelt buckle. The vehicle may be provided with a sensor or the like for detecting the signal, and the information detected by these sensors may be acquired by the in-vehicle terminal 3 via the vehicle control device or directly, and transmitted to the pedestrian terminal 1 .

If a door sensor is provided for each door, it can be detected whether the occupant exits the vehicle through the right or left door based on the detection information of the sensor. In addition, if a sensor for the seat and seat belt is installed in each seat on the left and right, based on the detection information of the sensor, it is possible to determine whether the occupant is sitting in the right or left seat. It is possible to detect whether to get off.

Next, a warning screen displayed on the car navigation device 4 according to the first embodiment will be described. FIG. 5 is an explanatory diagram showing an example of a warning screen displayed on the car navigation device 4. As shown in FIG.

When the pedestrian-to-vehicle communication unit 42 receives the getting-off message transmitted from the pedestrian terminal 1, the attention calling control unit 52 of the in-vehicle terminal 3 calls the driver's attention. In this embodiment, a warning screen is displayed on the car navigation device 4 as an action to call attention to the driver.

In this warning screen, an image 61 representing the situation in front of the vehicle (for example, an image of the front of the vehicle captured by a camera mounted on the vehicle) shows the position of the pedestrian terminal 1 that is the transmission source of the get-off message. A warning image 62 is displayed nearby. Also, on this warning screen, a message 63 is displayed to call attention to a person getting off from the vehicle in front.

Next, operation procedures of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the first embodiment will be described. FIG. 6 is a flowchart showing the operation procedure of the pedestrian terminal 1 and the vehicle-mounted terminal 3. As shown in FIG.

In the pedestrian terminal 1, first, in the getting-off motion detection unit 33, the position information of the own device acquired from the positioning unit 11, the detection information acquired from the detection unit 12, the lane information acquired from the lane detection unit 32, and the lane information from the storage unit Based on the acquired map information, it is determined whether or not the occupant of the device has started a potentially dangerous alighting motion (ST101).

Here, when it is determined that a dangerous exit operation has started (Yes in ST101), the message control section 31 broadcasts a get-off message from the vehicle-to-pedestrian communication section 13 (ST102). This getting-off message includes the position information of the own device acquired from the positioning unit 11 and the lane information acquired from the lane detection unit 32 in addition to the getting-off operation information.

Next, when the vehicle-to-pedestrian communication unit 13 receives the response message transmitted from the vehicle-mounted terminal 3 of the other vehicle (Yes in ST103), the danger determination unit 34 determines the location information and lane information of the other vehicle included in the response message. , the risk of collision between the occupant of the device and another vehicle is determined based on the positional information and lane information of the device (ST104).

Then, if there is a risk of collision (Yes in ST104), the alert control unit 35 alerts the occupant of the device (ST105).

On the other hand, if no response message is received (No in ST103) or if there is no risk of collision (No in ST104), the process ends without calling attention (ST105).

In the vehicle-mounted terminal 3, first, when the pedestrian-vehicle communication section 42 receives the get-off message transmitted from the pedestrian terminal 1 (Yes in ST201), the message control section 51 sends a response message corresponding to the received get-off message to the pedestrian terminal. It is transmitted by broadcast from inter-vehicle communication section 42 (ST202). This response message includes response information corresponding to the getting-off operation information of the getting-off message, as well as position information and lane information of the own device.

Further, the attention calling control section 52 calls the driver of the vehicle (ST203). At this time, a warning screen (see FIG. 5) is displayed on the car navigation device 4 .

The pedestrian terminal 1 periodically transmits a message containing pedestrian information such as location information. It should start sending messages when it detects motion.

(Second embodiment)
Next, a second embodiment will be described. It should be noted that points not particularly mentioned here are the same as those in the above-described embodiment. FIG. 7 is a block diagram showing schematic configurations of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the second embodiment.

In the first embodiment, the pedestrian terminal 1 performs risk determination after receiving the response message from the in-vehicle terminal 3, but in the present embodiment, the in-vehicle terminal 3 performs the risk determination, , the risk determination is not performed, so that the burden on the pedestrian terminal 1 can be reduced.

In this embodiment, the risk determination unit 34 provided in the pedestrian terminal 1 in the first embodiment (see FIG. 3) is omitted, and instead, a risk determination unit 53 is newly provided in the in-vehicle terminal 3. there is Others are the same as those of the first embodiment.

The risk determination unit 53 of the in-vehicle terminal 3 determines the location information and lane information of the pedestrian terminal 1 and the location information and lane information of the own vehicle included in the get-off message received from the pedestrian terminal 1 by the vehicle-to-pedestrian communication unit 42. Based on this, the risk of collision between the vehicle and an occupant getting off from another vehicle is determined. Specifically, if the pedestrian terminal 1 that sent the get-off message is located in the same lane as the vehicle and ahead of the vehicle in the direction of travel, it is determined that there is a risk of collision. .

Next, operation procedures of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the second embodiment will be described. FIG. 8 is a flowchart showing operation procedures of the pedestrian terminal 1 and the vehicle-mounted terminal 3. As shown in FIG.

In the pedestrian terminal 1, first, the getting-off motion detection unit 33 determines whether or not the occupant of the own device has started a potentially dangerous getting-off motion (ST101). Then, when it is determined that the dangerous exit operation has started (Yes in ST101), the message control section 31 transmits a exit message from the vehicle-pedestrian communication section 13 (ST102).

Next, when the pedestrian-to-vehicle communication unit 13 receives the response message transmitted from the vehicle-mounted terminal 3 of the other vehicle (Yes in ST103), the alert control unit 35 alerts the occupant of the own device (ST105).

On the other hand, if no response message is received (No in ST103), the process ends without calling attention (ST105).

In the vehicle-mounted terminal 3, first, when the pedestrian-vehicle communication section 42 receives the get-off message transmitted from the pedestrian terminal 1 (Yes in ST201), the danger determination section 53 receives the location information of the pedestrian terminal 1 included in the get-off message. Also, based on the lane information, the location information of the vehicle, the lane information, etc., the risk of collision between the vehicle and the occupants getting off from another vehicle is determined (ST211).

Here, if it is determined that there is a risk of collision (Yes in ST211), message control section 51 transmits a response message corresponding to the received get-off message from vehicle-pedestrian communication section 42 (ST202). Further, the attention calling control unit 52 calls the driver of the device (ST203).

On the other hand, if there is no risk of collision (No in ST211), the process ends without sending a response message (ST202) or calling attention (ST203).

(Third embodiment)
Next, a third embodiment will be described. It should be noted that points not particularly mentioned here are the same as those in the above-described embodiment. FIG. 9 is a sequence diagram showing the operation procedure of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the first embodiment and the third embodiment when passengers get off the vehicle at the same time.

In the first embodiment, when an occupant of the pedestrian terminal 1 starts getting off the vehicle, the pedestrian terminal 1 transmits a getting off message. As shown in FIG. 9A, the pedestrian terminal 1 of the occupant who has started getting off the vehicle first sends the get-off message, and the pedestrian terminal 1 of the occupant who has started the getting-off operation later also sends the get-off message. is sent. Therefore, the in-vehicle terminal 3 continuously alerts the driver, making the driver feel annoyed.

Therefore, in this embodiment, as shown in FIG. 9B, when a response message transmitted from the vehicle-mounted terminal 3 is received in response to the getting-off message of another pedestrian terminal 1, the passenger's getting-off operation is performed. Even if it is detected, do not send a get-off message.

Since the response message is broadcast from the vehicle-mounted terminal 3, other pedestrian terminals 1 located nearby other than the pedestrian terminal 1 that transmitted the get-off message that is the basis of the response message can also receive the response message. can be received.

Next, schematic configurations of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the third embodiment will be described. FIG. 10 is a block diagram showing a schematic configuration of the pedestrian terminal 1 and the vehicle-mounted terminal 3. As shown in FIG.

In this embodiment, the pedestrian terminal 1 is newly provided with a redundant getting-off detection unit 36 . Others are the same as those of the second embodiment (see FIG. 7).

The duplicate getting-off detection unit 36 of the pedestrian terminal 1 receives the response message transmitted from the vehicle-mounted terminal 3 of the other vehicle in response to the get-off message from the other pedestrian terminal 1 by the vehicle-to-pedestrian communication unit 13 within a predetermined time. , it is determined whether or not there is another occupant who is getting off the vehicle overlapping with the occupant of the own device. At this time, if two occupants are trying to get off from vehicles stopped on different lanes, it is not regarded as double getting off. That is, based on the lane information of the other pedestrian terminal 1 included in the response message, in addition to the condition that the other pedestrian terminal 1 and the own device are located in the same lane, the determination of duplicate getting off is performed. conduct.

Next, operation procedures of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the third embodiment will be described. FIG. 11 is a flowchart showing operation procedures of the pedestrian terminal 1 and the vehicle-mounted terminal 3. As shown in FIG.

In the pedestrian terminal 1, first, the getting-off motion detection unit 33 determines whether or not the occupant of the own device has started a potentially dangerous getting-off motion (ST101). Then, when it is determined that a potentially dangerous exit operation has started (Yes in ST101), next, the redundant exit detection unit 36 responds to the exit message from the other pedestrian terminal 1 by the other vehicle (own vehicle). ), it is determined whether or not the pedestrian-to-vehicle communication unit 13 has received the response message transmitted from the vehicle-mounted terminal 3 within a predetermined time (ST111).

Here, if a response message corresponding to the get-off message from another pedestrian terminal 1 is not received within a predetermined time (No in ST111), the message control unit 31 sends the get-off message to the vehicle-to-pedestrian communication unit 13. (ST102).

Next, when the vehicle-to-pedestrian communication unit 13 receives the response message transmitted from the vehicle-mounted terminal 3 of the other vehicle in response to the get-off message from the own device (Yes in ST103), the alert control unit 35 controls the occupant of the own device. (ST105).

On the other hand, if no response message corresponding to the get-off message from its own device is received (No in ST103), the process ends without calling attention (ST105).

Further, when a response message corresponding to the get-off message from another pedestrian terminal 1 is received within a predetermined time (Yes in ST111), the get-off message is not transmitted (ST102), and the alert control unit In 35, the attention of the occupant of the device is called (ST105).

Note that the "predetermined time" refers to a predetermined length of time (for example, one minute) immediately before the time when it is determined that the potentially dangerous exit operation is started. It may be set in the terminal 1, or may be variably set according to the moving speed of the vehicle included in the response message received from the in-vehicle terminal 3. FIG. In the case of a variable setting, for example, if the moving speed of the vehicle is low, the predetermined time is set short in order to distinguish it from the get-off message from other pedestrian terminals 1 (to call attention to each). Further, if the moving speed of the vehicle is high, it is conceivable to set a longer predetermined time in order to combine the alight messages from the other pedestrian terminals 1 into one message (do not call attention to duplication). . Also, whether or not a response message was received in the previous predetermined time period can be determined by storing the response message received in the past in the storage unit 16 .

The operation procedure of the vehicle-mounted terminal 3 is the same as that of the second embodiment (see FIG. 8).

As described above, in the present embodiment, even if the passenger, who is the user of the own device, starts a dangerous exit operation, the in-vehicle terminal 3 of the other vehicle transmits the exit message from the other pedestrian terminal 1 in response to the exit message. Since the get-off message is not sent when the other response message has already been received, the in-vehicle terminal 3 does not receive the get-off message redundantly, thereby avoiding the continuous alerting of the driver. be able to.

(Modified example of the third embodiment)
Next, a modified example of the third embodiment will be described. FIG. 12 is a sequence diagram showing operation procedures of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the modification of the third embodiment.

In the third embodiment, the redundant getting-off detection unit 36 (see FIG. 10) of the pedestrian terminal 1 receives the response message broadcasted from the vehicle-mounted terminal 3 in response to the getting-off message of the other pedestrian terminal 1. , it is determined that there is another occupant who is getting off the vehicle overlapping with the occupant of the own device. By doing so, it is determined that there is another occupant who is getting off the vehicle overlapping with the occupant of the own device.

Specifically, in ST111 of the flow chart of the third embodiment (see FIG. 11), the redundant getting-off detection unit 36 determines whether or not a get-off message has been received from another pedestrian terminal 1. . When a get-off message from another pedestrian terminal 1 is received, unlike the third embodiment, the process ends without calling the attention of the user of the pedestrian terminal 1 .

Based on the location information and lane information of the pedestrian terminal 1 included in the get-off message, the get-off message of the own device is transmitted to the in-vehicle terminal 3 according to the positional relationship between the other pedestrian terminal 1 and the own device. When a response message is received from the terminal 3, the passenger, who is the user of the device itself, may be alerted. For example, if the other pedestrian terminal 1 that sent the previous get-off message is far from the own device or is not on the same lane as the own device, the current get-off message of the own device is sent. It is preferable to transmit to the in-vehicle terminal 3 .

In addition, since the get-off message is transmitted by broadcasting, the get-off message can be received by another pedestrian terminal 1 in the vicinity. In addition, messages sent and received in inter-pedestrian communication are based on the specifications (data structure) common to ITS wireless communication, and a message sent from one pedestrian terminal 1 can be interpreted by another pedestrian terminal 1. can.

(Fourth embodiment)
Next, a fourth embodiment will be described. It should be noted that points not particularly mentioned here are the same as those in the above-described embodiment. FIG. 13 is an explanatory diagram showing a message transmission status according to the fourth embodiment.

In the third embodiment, when the passengers get off the vehicle at the same time, the pedestrian terminal 1 of the passenger who started getting off later does not transmit the get-off message. The hazards to the occupants are different.

That is, if the occupant who started getting off the vehicle first is closer to the vehicle than the occupant who started getting off later, the occupant who started getting off first has a higher risk. In this case, there is no need to re-send the get-off message to call the driver's attention again. On the other hand, if the occupant who started getting off later is closer to the target vehicle than the occupant who started getting off first, the occupant who started getting off later has a higher risk. In this case, it is necessary to re-send the get-off message to alert the driver again.

In the example shown in FIGS. 13A and 13B, two vehicles C1 and C2 are stopped in the same lane, and vehicle C3 is approaching from behind.

In the example shown in FIG. 13A, an occupant in a vehicle C2 closer to the vehicle C3 starts getting off first, and a get-off message is transmitted from the pedestrian terminal 1 of that occupant. , a response message is transmitted from the in-vehicle terminal 3 of the vehicle C3, and the in-vehicle terminal 3 alerts the driver. Here, when an occupant on the vehicle C1 away from the vehicle C3 starts getting off the vehicle, the occupant getting off the vehicle C2 has a higher risk than the occupant getting off the vehicle C1. Therefore, there is no need to call the driver's attention again, and in the present embodiment, the pedestrian terminal 1 of the passenger who is getting off the vehicle C1 does not send a get-off message again.

On the other hand, in the example shown in FIG. 13B, an occupant in a vehicle C1 away from the vehicle C3 starts getting off first, and a get-off message is transmitted from the pedestrian terminal 1 of that occupant. In response, the in-vehicle terminal 3 of the vehicle C3 transmits a response message, and the in-vehicle terminal 3 alerts the driver. Here, when an occupant getting on the vehicle C2 closer to the vehicle C3 starts getting off, the occupant getting off the vehicle C2 has a higher risk than the occupant getting off the vehicle C1. Therefore, it is necessary to call the driver's attention again. In this embodiment, the pedestrian terminal 1 of the passenger who is getting off the vehicle C2 transmits a get-off message again.

Next, schematic configurations of the pedestrian terminal 1 and the in-vehicle terminal 3 according to the fourth embodiment will be described. FIG. 14 is a block diagram showing a schematic configuration of the pedestrian terminal 1 and the vehicle-mounted terminal 3. As shown in FIG.

In this embodiment, the pedestrian terminal 1 is newly provided with a duplicate notification necessity determination unit 37 . Others are the same as those of the third embodiment (see FIG. 10).

The duplicate notification necessity determination unit 37 of the pedestrian terminal 1 determines whether or not the duplicate notification condition is met, in which duplicate getting-off messages need to be transmitted. Specifically, based on the location information of the other pedestrian terminal 1 that transmitted the get-off message and the location information of the in-vehicle terminal 3 that transmitted the response message, the other pedestrian terminal 1 If the pedestrian terminal 1 is closer to the vehicle-mounted terminal 3 than the own device and the pedestrian terminal 1 is located in the same lane as the own device, it is determined that the redundant notification condition does not apply.

Next, operation procedures of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the fourth embodiment will be described. FIG. 15 is a flowchart showing the operation procedure of the pedestrian terminal 1 and the vehicle-mounted terminal 3. As shown in FIG.

In the pedestrian terminal 1, first, the getting-off motion detection unit 33 determines whether or not the occupant of the own device has started a potentially dangerous getting-off motion (ST101). Then, when it is determined that a potentially dangerous getting-off operation has started (Yes in ST101), next, in the duplicate getting-off detection unit 36, in response to a get-off message from another pedestrian terminal 1, the in-vehicle terminal of the other vehicle is detected. It is determined whether or not the response message transmitted from 3 is received by the inter-pedestrian vehicle communication section 13 within a predetermined time (ST111).

Here, if no response message corresponding to the get-off message from another pedestrian terminal 1 is received within a predetermined time (No in ST111), the message control unit 31 sends the get-off message to the vehicle-to-pedestrian communication unit 13. (ST102).

Next, when the vehicle-to-pedestrian communication unit 13 receives the response message transmitted from the vehicle-mounted terminal 3 of the other vehicle in response to the get-off message from the own device (Yes in ST103), the alert control unit 35 controls the occupant of the own device. (ST105).

On the other hand, if no response message corresponding to the get-off message from its own device is received (No in ST103), the process ends without calling attention (ST105).

Further, if a response message corresponding to a get-off message from another pedestrian terminal 1 has been received within a predetermined time (Yes in ST111), then the duplicate notification necessity determination unit 37 A determination is made as to whether or not a duplicate notification condition that requires transmission of a get-off message is met (ST121). At this time, based on the location information of the other pedestrian terminal 1 that transmitted the get-off message and the location information of the in-vehicle terminal 3 that transmitted the response message, the other pedestrian terminal 1 is the own device. If the pedestrian terminal 1 is located closer to the in-vehicle terminal 3 and in the same lane as the own device, it is determined that the duplicate notification condition is not met.

Here, if the duplication notification condition is met (Yes in ST121), as in the case where no response message has been received (Yes in ST111), the process proceeds to transmission of a get-off message (ST102).

On the other hand, if the duplication notification condition is not met (No in ST121), the message to get off is not transmitted (ST102), and the attention alert control section 35 alerts the occupant of the own device (ST105).

The operation procedure of the vehicle-mounted terminal 3 is the same as in the second embodiment (see FIG. 8) and the third embodiment (see FIG. 11).

(Fifth embodiment)
Next, a fifth embodiment will be described. It should be noted that points not particularly mentioned here are the same as those in the above-described embodiment. FIG. 16 is a block diagram showing schematic configurations of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the fifth embodiment.

In the third embodiment and the fourth embodiment, even if the occupant of the own device starts a dangerous get-off operation, the vehicle-mounted terminal 3 of the other vehicle transmits the get-off message from the other pedestrian terminal 1 in response to the get-off message. However, in the present embodiment, when the passenger who is the user of the device starts a dangerous exit operation, sends a message to get off the vehicle, and if the in-vehicle terminal 3 receives multiple messages to get off within a predetermined period of time, it does not transmit a response message.

In the present embodiment, the duplicate getting-off detection unit 36 provided in the pedestrian terminal 1 in the third embodiment (see FIG. 10) is omitted, and instead, a duplicate getting-off detection unit 54 is newly provided in the vehicle-mounted terminal 3. It is Others are the same as the third embodiment.

Duplicate get-off detection unit 54 of in-vehicle terminal 3 receives a get-off message from another pedestrian terminal 1 different from pedestrian terminal 1 that sent the get-off message received by pedestrian-to-vehicle communication unit 42 within a predetermined time. determine whether The get-off message includes a terminal ID, and the terminal ID can be used to specify the pedestrian terminal 1 that sent the get-off message.

Next, operation procedures of the pedestrian terminal 1 and the vehicle-mounted terminal 3 according to the fifth embodiment will be described. FIG. 17 is a flowchart showing the operation procedure of the pedestrian terminal 1 and the vehicle-mounted terminal 3. As shown in FIG.

The operation procedure of the pedestrian terminal 1 is the same as that of the second embodiment (see FIG. 8).

In the vehicle-mounted terminal 3, first, when the pedestrian-vehicle communication section 42 receives the get-off message transmitted from the pedestrian terminal 1 (Yes in ST201), the danger determination section 53 receives the location information of the pedestrian terminal 1 included in the get-off message. Also, based on the lane information, the location information of the vehicle, the lane information, etc., the risk of collision between the vehicle and the occupants getting off from another vehicle is determined (ST211).

Here, if it is determined that there is a risk of collision (Yes in ST211), next, in the duplicate getting off detection unit 54, another pedestrian different from the pedestrian terminal 1 that sent the getting off message received this time is detected. It is determined whether or not a get-off message has been received from the terminal 1 within a predetermined time prior to the current reception (ST221).

Here, if a get-off message has not been received from another pedestrian terminal 1 within a predetermined period of time (No in ST221), the attention alert control section 52 alerts the driver of the own device (ST203). . Further, in the message control section 51, a response message corresponding to the received get-off message is transmitted from the inter-pedestrian communication section 42 (ST202).

On the other hand, if a get-off message has been received from another pedestrian terminal 1 within a predetermined period of time (Yes in ST221), a response message is transmitted without alerting the driver of the vehicle (ST203). (ST202).

If there is no risk of collision (No in ST211), the process ends without sending a response message (ST202) or calling attention (ST203).

As described above, in the present embodiment, when the in-vehicle terminal 3 receives multiple get-off messages, it transmits a response message, but does not call attention to the driver of the own vehicle. While the driver's attention is alerted, it is possible to avoid that the driver's attention is alerted in rapid succession.

Note that if a get-off message is received from another pedestrian terminal 1 different from the pedestrian terminal 1 that sent the get-off message received this time within a predetermined time prior to the current reception (Yes in ST221). However, if the pedestrian terminal 1 that sent the get-off message received this time is more dangerous than the pedestrian terminal 1 that sent the get-off message received earlier, , the driver of the own vehicle may be alerted. In this case, the risk is determined based on the location information and lane information included in the get-off message and the location information and lane information of the own vehicle.

As described above, the embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments with modifications, replacements, additions, omissions, and the like. Further, it is also possible to combine the components described in the above embodiments to form a new embodiment.

For example, in the above embodiment, a get-off message indicating that the occupant is getting off the vehicle is transmitted from the pedestrian terminal to the in-vehicle terminal, but the destination of the get-off message is not limited to the in-vehicle terminal. , a pedestrian terminal owned by another person. For example, there is a case where a person carrying a pedestrian terminal gets on a light vehicle such as a bicycle. In this case, it is preferable to transmit a get-off message to the pedestrian terminal of the person riding on the light vehicle.

In addition, the pedestrian terminal 1 indicates that the pedestrian has performed a dangerous act not only when the passenger who is the user is about to get off the vehicle, but also when the pedestrian performs a dangerous act such as running out while walking. The message may be transmitted to the in-vehicle terminal 3 . By transmitting both the message indicating that the pedestrian has committed a dangerous act and the message to get off the vehicle to the in-vehicle terminal 3, the driver of the vehicle can distinguish whether the pedestrian jumps out or gets off the vehicle. The danger of collision can be avoided more.

In addition, it detects overlaps between a message indicating that a pedestrian has committed a dangerous act and a message indicating that the pedestrian is getting out of the vehicle, and depending on the notification conditions, alerts the driver to only one of the messages. may At this time, if the message indicating that a dangerous act has been performed and the message to get off the vehicle are sent from the same lane within a predetermined time, multiple warnings to the driver are not performed, and if they are sent from different lanes, , it is advisable to call attention to each of them.

The pedestrian terminal device, the in-vehicle terminal device, the inter-vehicle communication system, and the exit notification method according to the present invention are designed to allow passengers to exit the vehicle even if the driver of the vehicle is not equipped with an in-vehicle terminal device equipped with inter-vehicle communication functions. Further, it is possible to notify the drivers of surrounding vehicles that the occupant is getting off without providing a sensor for detecting the occupant's getting off operation in the vehicle. A pedestrian terminal device possessed by a vehicle occupant, an in-vehicle terminal device mounted in a vehicle, a pedestrian-to-vehicle communication system for performing inter-vehicle communication between the pedestrian terminal device and the in-vehicle terminal device, and a pedestrian This is useful as a method of notifying a passenger to get off from a terminal device to an in-vehicle terminal device.

1 Pedestrian terminal 3 Vehicle-mounted terminal 11 Positioning unit 12 Detecting unit 13 Pedestrian-vehicle communication unit 15 Control unit 16 Storage unit 41 Positioning unit 42 Pedestrian-vehicle communication unit 44 Control unit 45 Storage unit

Claims (8)

A pedestrian terminal device possessed by a vehicle occupant,
a positioning unit that acquires position information of its own device;
a pedestrian-to-vehicle communication unit that performs inter-vehicle communication with an in-vehicle terminal device mounted on a nearby vehicle;
a detection unit that detects a state that changes in response to an occupant's disembarking motion that possesses the device;
a control unit for transmitting, from the pedestrian-to-vehicle communication unit to the in-vehicle terminal device, a get-off message indicating that the occupant is getting off the vehicle when detecting the occupant's getting off operation based on the detection result of the detection unit;
with
When the inter-pedestrian communication unit receives within a predetermined time a response message transmitted from the in-vehicle terminal device in response to a get-off message from another pedestrian terminal device, the control unit causes a passenger carrying the own device to get off the vehicle. A pedestrian terminal device characterized in that it does not transmit the get-off message even when it detects The detection unit is
2. The pedestrian terminal device according to claim 1, wherein the pedestrian terminal device is an acceleration sensor and a gyro sensor. The control unit
Even if the pedestrian-to-vehicle communication unit receives the response message corresponding to the get-off message of the another pedestrian terminal device within a predetermined time, the occupant who owns the own device also owns the another pedestrian terminal device. 2. The pedestrian terminal device according to claim 1 , wherein the get-off message is transmitted when the danger is higher than that of another occupant. The control unit
When the own device is closer to the in-vehicle terminal device than the other pedestrian terminal device and the device is located in the same lane as the another pedestrian terminal device, the occupant carrying the own device is closer to the vehicle terminal device than the other pedestrian terminal device. 4. The pedestrian terminal device according to claim 3 , wherein it is determined that the danger is higher than that of another passenger. An in-vehicle terminal device mounted in a vehicle,
a location information acquisition unit that acquires location information of its own device;
a pedestrian-to-vehicle communication unit that performs inter-pedestrian communication with a pedestrian terminal device possessed by an occupant of another vehicle;
a control unit for alerting a driver of the own vehicle when a getting-off message indicating that an occupant is getting off from another vehicle is received from the pedestrian terminal device by the inter-pedestrian-to-vehicle communication unit;
with
The control unit
When the get-off message is received, if the get-off message of another pedestrian terminal device different from the one that sent the get-off message is received within a predetermined time, the get-off message received this time is sent. An in-vehicle terminal device that does not alert a driver of the own vehicle except when the pedestrian terminal device as a transmission source is more dangerous than the another pedestrian terminal device. The control unit
If the pedestrian terminal device that has sent the get-off message received this time is closer to the device than the other pedestrian terminal device and is located in the same lane as the device, the get-off message received this time is transmitted. 6. The in-vehicle terminal device according to claim 5 , wherein the original pedestrian terminal device is determined to be more dangerous than the other pedestrian terminal device. A pedestrian-to-vehicle communication system for performing inter-pedestrian communication between a pedestrian terminal device carried by a vehicle occupant and an in-vehicle terminal device mounted on a vehicle,
The pedestrian terminal device
a positioning unit that acquires position information of its own device;
a pedestrian-to-vehicle communication unit that performs inter-pedestal communication with the in-vehicle terminal device;
a detection unit that detects a state that changes in response to a dismounting motion of an occupant possessing the device;
a control unit for transmitting, from the pedestrian-to-vehicle communication unit to the in-vehicle terminal device, a get-off message indicating that the occupant is getting off the vehicle when detecting the occupant's getting off operation based on the detection result of the detection unit;
with
The in-vehicle terminal device
a location information acquisition unit that acquires location information of its own device;
a pedestrian-to-vehicle communication unit that performs inter-pedestrian communication with the pedestrian terminal device;
a controller for alerting a driver of the own vehicle when the vehicle-to-pedestrian communication unit receives the getting-off message from the pedestrian terminal device;
with
When the pedestrian -to-vehicle communication unit receives within a predetermined time a response message transmitted from the vehicle-mounted terminal in response to a getting-off message from another pedestrian terminal, the control unit of the pedestrian terminal device carries the pedestrian terminal device. An inter-vehicle communication system characterized by not transmitting the get-off message even when it is detected that an occupant is getting off the vehicle. A getting-off notification method for notifying an in-vehicle terminal device mounted on a vehicle of a passenger's getting off from a pedestrian terminal device possessed by a vehicle occupant,
The pedestrian terminal device
When detecting a state that changes according to the movement of the passenger getting off the vehicle, and detecting the movement of the passenger carrying the device to get off the vehicle based on the detection result, a get-off message indicating that the passenger is getting off the vehicle is displayed between the pedestrian and the vehicle. Transmit to the in-vehicle terminal device by communication,
The in-vehicle terminal device
When receiving the getting-off message from the pedestrian terminal device, alerting the driver of the own vehicle,
When the pedestrian terminal device receives within a predetermined time a response message transmitted from the in-vehicle terminal device in response to a get-off message from another pedestrian terminal device, the pedestrian terminal device detects that an occupant carrying the device is getting off the vehicle. However , the getting off notification method is characterized in that the getting off message is not transmitted.

Images