JP2017033043A - Notification device and notification system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a notification device capable of, when a plurality of vehicles related to each other perform follow-up traveling, notifying the driver of the vehicle of information on driving support such that both of the vehicle and a follow-up vehicle can pass an intersection.SOLUTION: A notification device 1 includes: a speed detection part for detecting the speed of a vehicle; a position detection part for detecting the position of the vehicle; a storage part for storing the position of an intersection; and a notification part for receiving traffic light information indicating time until a traffic light is switched to a stop signal. The notification device 1 calculates a distance between the intersection and the vehicle on the basis of the position of the intersection and the position of the vehicle. Then, the notification device 1 calculates the speed or acceleration of the vehicle for enabling a follow-up vehicle D to pass the intersection on the basis of a distance obtained by adding the distance corresponding to an inter-vehicle distance between the vehicle and the follow-up vehicle which follows up the vehicle to the distance calculated by a distance calculation part and the traffic light information received by the notification part. The notification device 1 notifies the driver of the vehicle of information corresponding to the calculation result by a notification part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a notification device and a notification system that notify various types of information to a vehicle traveling in front of the following vehicle so that both the vehicle and the following vehicle following the vehicle can pass through the intersection.

  Patent Document 1 discloses a traffic system that collectively transmits information related to display schedules of signal light colors of traffic signal controllers provided at a plurality of intersections to a vehicle.

  Patent Document 2 discloses an offset calculation device that calculates an offset of a signal lamp that is system-controlled at a plurality of intersections by running a plurality of simulated vehicles on a simulated road network including a plurality of intersections. In particular, the offset calculation apparatus according to Patent Document 2 can calculate an optimum offset considering a vehicle that travels at a high speed exceeding the regulation speed.

  Patent Document 3 discloses a driving support device that supports driving of a vehicle so that the vehicle can smoothly pass through an intersection provided with a traffic signal. The driving support device includes a vehicle speed detection unit that detects a speed of the vehicle, a communication unit that acquires signal cycle information indicating a cycle in which a display of a traffic signal arranged in the traveling direction of the vehicle is switched, and relative position information of the vehicle and the traffic signal And a position calculation unit for calculating. The driving support device calculates a corrected vehicle speed based on the driving situation before the traffic signal, the current speed of the vehicle, and the like, and determines whether or not the vehicle can pass the intersection. When it is determined that the driving support device can pass, the driving support device supports driving of the vehicle by displaying a target vehicle speed range for passing through the intersection.

JP 2013-20568 A JP 2013-80343 A JP 2013-97622 A

However, when two vehicles related to each other, for example, a guided vehicle is traveling while guiding a large special vehicle, it is desirable that both can pass through the intersection. However, the driving support device according to Patent Document 3 has such a configuration. Driving assistance is not possible.
That is, even if each vehicle is equipped with the driving support device, only the vehicle ahead can pass through the intersection, and the rear vehicle cannot pass through the intersection. If the guided vehicle is far away from the special vehicle, there is a risk that the guiding operation may be hindered.

  Accordingly, an informing device and an informing system capable of informing a driver of a vehicle of information related to driving support so that the vehicle and the following vehicle can both pass through the intersection when a plurality of vehicles related to each other follow the vehicle. The purpose is to provide.

  A notification device according to an aspect of the present invention stores a speed detection unit that detects the speed of a vehicle, a position detection unit that detects the position of the vehicle, a storage unit that stores the position of an intersection, and the storage unit. Based on the position of the intersection and the position of the vehicle detected by the position detection unit, a distance calculation unit that calculates a distance between the intersection and the vehicle, and a traffic signal provided at the intersection are switched to a stop signal. The distance obtained by adding the distance according to the inter-vehicle distance between the communication unit that receives the traffic signal information indicating the time until and the following vehicle that follows the vehicle to the distance calculated by the distance calculation unit, and Based on the traffic signal information received by the communication unit, a calculation unit that calculates the speed or acceleration of the vehicle at which the following vehicle can pass the intersection, and information corresponding to the calculation result of the calculation unit are provided to the driver of the vehicle. Notify And a knowledge section.

  A notification system according to an aspect of the present invention includes the notification device, and a transmission device that transmits signal information indicating a time until the traffic signal is switched to a stop signal to the notification device. The traffic signal information transmitted from the transmission device is received.

  A notification system according to an aspect of the present invention includes the notification device, and a driving support information providing device that provides the notification device with information related to driving support for allowing both the vehicle and the following vehicle to pass through an intersection. The notification device is a notification system for notifying a driver of the vehicle of information provided from the driving support information providing device, and the driving support information providing device includes a plurality of vehicles that have passed through the intersection in the past. A probe information storage unit that stores probe information including positions and speeds at a plurality of points in time, and the notification device detects the vehicle speed detected by the speed detection unit and the vehicle speed detected by the position detection unit. A transmission unit that transmits the position and the traffic signal information received by the communication unit to the driving support information providing device, wherein the driving support information providing device is the notification device; Based on the received speed, position, and traffic signal information transmitted from the receiver, the speed, position, and traffic signal information received by the receiver, and information stored in the probe information storage unit, the following vehicle is the intersection. A specifying unit that specifies the speed or acceleration of the vehicle that can pass through the vehicle, and provides information on the speed or acceleration specified by the specifying unit to the notification device.

  A notification system according to an aspect of the present invention includes the notification device, and a driving support information providing device that provides the notification device with information related to driving support for allowing both the vehicle and the following vehicle to pass through an intersection. The notification device is a notification system for notifying a driver of the vehicle of information provided from the driving support information providing device, and the driving support information providing device includes a plurality of vehicles that have passed through the intersection in the past. And a probe information storage unit that stores probe information including positions and speeds at a plurality of points in time of each vehicle, and the notification device detects the vehicle type of the following vehicle and the speed detection unit. The speed of the vehicle, the position of the vehicle detected by the position detection unit, the traffic signal information received by the communication unit, and the vehicle type received by the reception unit are A transmission unit for transmitting to the information providing device, the driving support information providing device, the receiving unit for receiving the speed, position, traffic signal information and vehicle type transmitted from the notification device, the speed received by the receiving unit, A specifying unit that specifies a speed or acceleration of the vehicle on which the following vehicle can pass the intersection based on a position, a traffic signal information and a vehicle type, and information stored in the probe information storage unit; Information on the specified speed or acceleration is provided to the notification device.

  In addition, this application is not only realizable as an alerting | reporting apparatus provided with such a characteristic process part, In order to implement | achieve as a alerting | reporting method which uses this characteristic process as a step, or to perform such a step on a computer It can be realized as a program. Further, it can be realized as a semiconductor integrated circuit that realizes part or all of the notification device, or can be realized as another system including the notification device.

  According to the above, when a plurality of vehicles that are related to each other follow, the notification device that can notify the driver of the vehicle of information related to driving support so that both the vehicle and the following vehicle can pass through the intersection, and It is possible to provide a notification system.

It is a schematic diagram which shows the structural example of the alerting | reporting system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structural example of the alerting | reporting apparatus which concerns on Embodiment 1 of this invention. It is a conceptual diagram which shows the example of a record layout of the table which concerns on Embodiment 1 of this invention. It is a flowchart which shows the alerting | reporting process sequence which concerns on Embodiment 1 of this invention. It is a conceptual diagram which shows the record layout example of the table which concerns on Embodiment 2 of this invention. It is a flowchart which shows the alerting | reporting process sequence which concerns on Embodiment 3 of this invention. It is a block diagram which shows the structural example of the alerting | reporting apparatus which concerns on Embodiment 4 of this invention. It is a block diagram which shows the structural example of the driving assistance information provision apparatus which concerns on Embodiment 4 of this invention. It is a conceptual diagram which shows an example of the probe information which concerns on Embodiment 4 of this invention. It is a flowchart which shows the alerting | reporting process sequence which concerns on Embodiment 4 of this invention. It is a flowchart which shows the alerting | reporting process sequence which concerns on Embodiment 4 of this invention. It is a flowchart which shows the process sequence which concerns on provision of driving assistance information. It is a block diagram which shows the structural example of the alerting | reporting apparatus which concerns on Embodiment 6 of this invention. It is a conceptual diagram which shows an example of the probe information which concerns on Embodiment 6 of this invention.

[Description of Embodiment of the Present Invention]
First, embodiments of the present invention will be listed and described. Moreover, you may combine arbitrarily at least one part of embodiment described below.

(1) A notification device according to an aspect of the present invention includes a speed detection unit that detects the speed of a vehicle, a position detection unit that detects the position of the vehicle, a storage unit that stores the position of an intersection, and the storage unit. The distance calculation unit for calculating the distance between the intersection and the vehicle based on the position of the intersection stored by the vehicle and the position of the vehicle detected by the position detection unit, and the traffic signal provided at the intersection stop A distance obtained by adding a distance according to an inter-vehicle distance between a communication unit that receives traffic signal information indicating a time until switching to a signal and a following vehicle that follows the vehicle to the distance calculated by the distance calculation unit And a calculation unit that calculates the speed or acceleration of the vehicle that allows the following vehicle to pass through the intersection based on the traffic signal information received by the communication unit, and information according to the calculation result of the calculation unit Inform the driver of And a notification unit for.

In the present application, the distance calculation unit calculates the distance between the intersection and the vehicle based on the position of the intersection stored in the storage unit and the position of the vehicle detected by the position detection unit. Note that the storage unit may store the position of the intersection in advance, or may acquire information indicating the position of the intersection from the outside and store the acquired information.
On the other hand, a communication part receives the traffic signal information which shows time until the traffic signal provided in the said intersection switches to a stop signal. The stop signal includes not only a signal indicating that the vehicle should stop before the intersection, but also a signal indicating that the vehicle should immediately pass through the intersection when the stop signal cannot be safely stopped before the intersection. The traffic signal information may be information that directly indicates the time from when the traffic signal is switched to the stop signal, or information that indirectly indicates the time until the traffic signal is switched to the stop signal. Also good. For example, the traffic signal information may be information such as a cycle, split, and offset used for traffic signal control.
Then, the notification device adds a distance corresponding to the distance between the vehicle and the following vehicle to the distance calculated by the distance calculation unit. That is, the distance between the intersection and the vehicle is corrected to the distance between the intersection and the following vehicle. Next, the calculation unit of the notification device calculates the speed or acceleration of the vehicle that allows the following vehicle to pass through the intersection. When the vehicle travels at the speed or travels while accelerating at the acceleration, the following vehicle can pass through the intersection, so that the vehicle traveling in front of the vehicle can also pass through the intersection. That is, both the vehicle and the following vehicle can pass through the intersection.
The notification unit notifies the calculation unit of information corresponding to the calculation result to the driver of the vehicle. The information corresponding to the calculation result is, for example, information indicating that the vehicle should pass through the intersection or stop before the intersection, information indicating the target vehicle speed, information indicating the degree of acceleration, and the like.
According to the notification device configured as described above, even when the following vehicle is following the leading vehicle, the driver of the leading vehicle can be notified so that both the vehicle and the following vehicle can pass through the intersection. On the other hand, information relating to driving support can be notified.
Note that the notification device may be a device mounted on the vehicle, or may be a device detachable from the vehicle. Further, the vehicle and the following vehicle include not only a four-wheeled vehicle but also a two-wheeled vehicle and other vehicles. Furthermore, the number of following vehicles that follow the leading vehicle is not limited to one, and a plurality of following vehicles may follow the leading vehicle. Furthermore, the vehicle and the following vehicle need not be different types of vehicles, and may be the same type of vehicles.

(2) A table in which the speed of the vehicle is associated with a distance according to the speed, and the calculation unit is configured to perform the tracking vehicle based on the distance corresponding to the speed detected by the speed detection unit. Is preferably configured to calculate the speed or acceleration of the vehicle that can pass through the intersection.

In the present application, the notification device includes a table in which the speed of the vehicle is associated with the distance according to the speed. The distance between the vehicle and the following vehicle depends on the speed of the vehicle. The table stores the distance between the vehicle assumed when the vehicle is traveling at a specific speed and the following vehicle. The calculation unit calculates the speed or acceleration of the vehicle that allows both the vehicle and the following vehicle to pass through the intersection using a distance according to the speed of the vehicle.
Therefore, the notification device can calculate the speed or acceleration of the vehicle so that both the vehicle and the following vehicle can pass through the intersection.

(3) An acceleration necessity determination unit that determines whether the speed detected by the speed detection unit is equal to or higher than the speed calculated by the calculation unit, and the notification unit includes the acceleration necessity determination unit. When it determines with no, the structure which alert | reports the acceleration of the said vehicle is preferable.

In the present application, the acceleration necessity determination unit determines whether the current vehicle speed detected by the speed detection unit is equal to or higher than the speed calculated by the calculation unit. A notifying part alert | reports acceleration of a vehicle, when an acceleration necessity determination part determines with no.
That is, if the vehicle and the following vehicle cannot pass through the intersection without acceleration, the notification unit notifies the vehicle driver that the vehicle should be accelerated.

(4) A threshold determination unit that determines whether or not the speed calculated by the calculation unit is equal to or less than a predetermined threshold, and the notification unit determines whether or not to accelerate when the threshold determination unit determines NO Regardless of the determination result of the part, it is preferable to notify the stop of the vehicle.

In the present application, the threshold determination unit determines whether or not the speed calculated by the calculation unit is equal to or less than a predetermined threshold. The predetermined threshold is, for example, a legal speed. When the threshold determination unit determines NO, the notification unit notifies the stop of the vehicle regardless of the determination result of the acceleration necessity determination unit.
For example, when the vehicle cannot be passed through unless the vehicle is accelerated to a speed exceeding the legal speed, the notification unit notifies the vehicle driver that the vehicle should stop at the intersection. Both the vehicle and the following vehicle can safely stop before the intersection.

(5) An acceleration availability determination unit that determines whether acceleration is possible based on a difference between the speed calculated by the calculation unit and the speed detected by the speed detection unit, and the notification unit includes the acceleration availability determination unit. In the case where it is determined that the vehicle is impossible, it is preferable to notify the stop of the vehicle regardless of the determination result of the acceleration necessity determination unit.

  In the present application, the acceleration propriety determination unit determines whether or not acceleration is possible based on the difference between the speed calculated by the calculation unit and the speed detected by the speed detection unit. When the acceleration determination unit determines that the acceleration is impossible, the notification unit notifies the stop of the vehicle regardless of the determination result of the acceleration necessity determination unit. That is, when it is necessary to accelerate the vehicle with dangerous acceleration, the notification unit notifies the driver of the vehicle that the vehicle should be stopped at the intersection. Both the vehicle and the following vehicle can safely stop before the intersection.

(6) A configuration in which a positive / negative determining unit that determines whether the acceleration calculated by the calculating unit is positive or negative is provided, and when the positive / negative determining unit determines that the positive / negative determining unit is positive, a configuration in which the acceleration of the vehicle is notified is preferable. .

In the present application, the positive / negative determination unit determines whether the acceleration calculated by the calculation unit is positive or negative. An alerting | reporting part alert | reports acceleration of a vehicle, when a positive / negative determination part determines with positive.
That is, if the vehicle and the following vehicle cannot pass through the intersection without acceleration, the notification unit notifies the vehicle driver that the vehicle should be accelerated.

(7) A threshold determination unit that determines whether the speed after acceleration due to the acceleration calculated by the calculation unit is equal to or less than a predetermined threshold, and the notification unit determines that the threshold determination unit determines NO, Regardless of the determination result of the positive / negative determination unit, it is preferable to notify the stop of the vehicle.

In the present application, the threshold determination unit determines whether or not the speed after acceleration by the acceleration calculated by the calculation unit is equal to or less than a predetermined threshold. When the threshold determination unit determines NO, the notification unit notifies the stop of the vehicle regardless of the determination result of the positive / negative determination unit.
For example, when the vehicle cannot be passed through unless the vehicle is accelerated to a speed exceeding the legal speed, the notification unit notifies the vehicle driver that the vehicle should stop at the intersection. Both the vehicle and the following vehicle can safely stop before the intersection.

(8) An acceleration propriety determination unit that determines whether or not acceleration is possible based on the acceleration calculated by the calculation unit, and when the acceleration determination unit determines that the acceleration propriety determination unit is impossible, Regardless of the determination result, it is preferable to notify the stop of the vehicle.

  In the present application, the acceleration propriety determination unit determines whether or not acceleration is possible based on the acceleration calculated by the calculation unit. When the acceleration determination unit determines that acceleration is not possible, the notification unit notifies the stop of the vehicle regardless of the determination result of the positive / negative determination unit. That is, when it is necessary to accelerate the vehicle with dangerous acceleration, the notification unit notifies the driver of the vehicle that the vehicle should be stopped at the intersection.

(9) The notification system according to one aspect of the present invention provides the notification apparatus according to any one of the aspects (1) to (8) and the traffic signal information indicating the time until the traffic signal is switched to the stop signal. And the notification device receives the traffic signal information transmitted from the transmission device.

In this application, a transmission apparatus transmits the traffic signal information which shows the time until a traffic signal switches to a stop signal to an alerting | reporting apparatus. The transmission device is, for example, a traffic signal control device that controls the operation of a traffic signal provided at an intersection. The traffic signal control device transmits traffic signal information to the notification device by road-to-vehicle communication. Further, the transmission device may be an in-vehicle wireless communication device that is mounted on another vehicle and capable of inter-vehicle communication with the notification device. The in-vehicle wireless communication device acquires traffic signal information from a traffic signal provided at an intersection and other external devices having traffic signal information, and transmits the acquired traffic signal information to a notification device by inter-vehicle communication. Further, the transmission device may be a portable wireless communication device capable of communication between a notification device and a pedestrian. The portable wireless communication device acquires traffic signal information from a traffic signal provided at an intersection and other external devices having traffic signal information, and transmits the acquired traffic signal information to a notification device by inter-step communication. Needless to say, the notification device may receive signal information transmitted via a plurality of communication devices.
The notification device according to any one of modes (1) to (8) receives the traffic signal information transmitted from the communication device, and exhibits the above-described effects by using the received traffic signal information.

(10) A notification system according to an aspect of the present invention is a driving system for causing the notification device according to any one of aspects (1) to (8) and the vehicle and the following vehicle to pass through an intersection. A driving support information providing device that provides information related to the support to the notification device, wherein the notification device is a notification system that notifies the driver of the vehicle of the information provided from the driving support information providing device, The driving support information providing device includes a probe information storage unit that stores probe information including positions and speeds at a plurality of points in time for each of a plurality of vehicles that have passed through the intersection in the past, and the notification device is provided in the speed detection unit. A transmission unit for transmitting the vehicle speed detected by the position detection unit, the vehicle position detected by the position detection unit, and the traffic signal information received by the communication unit to the driving support information providing device; The driving support information providing device includes a receiving unit that receives the speed, position, and signal information transmitted from the notification device, and the speed, position, and signal information received by the receiving unit, and the probe information storage unit. Based on the information stored therein, a specifying unit that specifies the speed or acceleration of the vehicle through which the following vehicle can pass the intersection, and information on the speed or acceleration specified by the specifying unit to the notification device provide.

In the present application, the notification device transmits the vehicle speed, position, and traffic signal information to the driving support information providing device. The driving support information providing device receives the vehicle speed, position, and traffic signal information transmitted from the notification device. The probe information storage unit of the driving support information providing device stores probe information of vehicles that have passed through the intersection in the past. The probe information is a sample for specifying the speed or acceleration of the leading vehicle so that two vehicles can both pass through the intersection. The specifying unit of the driving support information providing device specifies the speed or acceleration of the vehicle that allows both the vehicle and the following vehicle to pass through the intersection based on the information transmitted from the notification device and the information stored in the probe information storage unit. To do. And a driving assistance information provision apparatus provides the information of the speed or acceleration specified by the specific | specification part to a alerting | reporting apparatus as driving assistance information. According to the notification system configured as described above, the speed or acceleration of the vehicle and the following vehicle that can pass through the intersection are determined based on the past vehicle probe information, that is, the past actual traveling history of the plurality of vehicles. Can be identified. And the alerting | reporting apparatus can alert | report the information which concerns on driving assistance using the speed or acceleration specified in this way.
Since the speed or acceleration is specified using the probe information of the vehicle that has passed through the actual intersection, the vehicle and the following vehicle can pass through the intersection more reliably.

(11) A notification system according to an aspect of the present invention is a driving for causing the notification device according to any one of aspects (1) to (8) and the vehicle and the following vehicle to pass through an intersection. A driving support information providing device that provides information related to the support to the notification device, wherein the notification device is a notification system that notifies the driver of the vehicle of the information provided from the driving support information providing device, The driving support information providing device includes a probe information storage unit that stores probe information including vehicle types of a plurality of vehicles that have passed through the intersection in the past, positions and speeds at a plurality of times of the vehicles, and the notification device includes: A reception unit that receives a vehicle type of the following vehicle, a speed of the vehicle detected by the speed detection unit, a position of the vehicle detected by the position detection unit, and a signal received by the communication unit A transmission unit for transmitting information and a vehicle type received by the reception unit to the driving support information providing device, wherein the driving support information providing device receives the speed, position, signal information and vehicle type transmitted from the notification device; And the speed or acceleration of the vehicle at which the following vehicle can pass the intersection based on the speed, position, traffic signal information and vehicle type received by the receiving unit, and information stored in the probe information storage unit. A specifying unit that specifies the speed or acceleration specified by the specifying unit is provided to the notification device.

In the present application, the notification device receives the vehicle type of the following vehicle at the reception unit. The vehicle type of the following vehicle indirectly indicates the weight of the following vehicle. The weight of the following vehicle is related to acceleration or deceleration characteristics, and whether or not the following vehicle can pass through the intersection depends on the weight of the following vehicle.
The notification device transmits the vehicle speed, position, signal information, and vehicle type of the following vehicle to the driving support information providing device. The driving support information providing device receives the vehicle speed, position, and traffic signal information transmitted from the notification device. The probe information storage unit of the driving support information providing device stores probe information of vehicles that have passed through the intersection in the past. The probe information includes the vehicle type, the position and speed of the vehicle at a plurality of time points. The specifying unit of the driving support information providing device specifies the speed or acceleration of the vehicle that allows both the vehicle and the following vehicle to pass through the intersection based on the information transmitted from the notification device and the information stored in the probe information storage unit. To do. That is, the driving support information providing apparatus specifies the speed or acceleration of the vehicle that allows both the vehicle and the following vehicle to pass through the intersection in consideration of the vehicle type of the following vehicle. And a driving assistance information provision apparatus provides the information of the speed or acceleration specified by the specific | specification part to a alerting | reporting apparatus as driving assistance information.
According to the notification system configured as described above, the speed or acceleration of the vehicle that allows both the vehicle and the following vehicle to pass through the intersection can be specified based on the past vehicle probe information in consideration of the vehicle type. And the alerting | reporting apparatus can alert | report the information which concerns on driving assistance using the speed or acceleration specified in this way. By considering the vehicle type of the following vehicle, the vehicle and the following vehicle can pass through the intersection more reliably.

(12) The probe information includes meteorological information at the time when the position and speed of the vehicle are detected, and the driving support information providing device includes a meteorological information acquiring unit that acquires meteorological information. Based on the information received by the reception unit, the information stored in the probe information storage unit, and the weather information acquired by the weather information acquisition unit, the speed or acceleration of the vehicle at which the following vehicle can pass the intersection A specific configuration is preferred.

In the present application, the probe information stored in the probe information storage unit includes weather information at the time when the position and speed of the vehicle are detected. The weather information indirectly indicates the road surface condition. The weather information relates to the acceleration or deceleration characteristics of the following vehicle, and whether or not the following vehicle can pass through the intersection depends on the weather information.
The driving support information providing device is configured such that the vehicle and the following vehicle pass through the intersection based on the information transmitted from the notification device, the information stored in the probe information storage unit, and the weather information acquired by the weather information acquisition unit. Identify possible vehicle speed or acceleration.
According to the notification system configured as described above, the speed or acceleration of the vehicle that allows both the vehicle and the following vehicle to pass through the intersection can be specified based on the past vehicle probe information considering weather information. And the alerting | reporting apparatus can alert | report the information which concerns on driving assistance using the speed or acceleration specified in this way. By considering the weather information, the vehicle and the following vehicle can pass through the intersection more reliably.

(13) The probe information includes weather information at the time when the position and speed of the vehicle are detected, the notification device includes an acquisition unit that acquires weather information, and the transmission unit is the weather acquired by the acquisition unit Information is transmitted, the receiving unit is configured to receive weather information transmitted by the transmitting unit, the specifying unit is information received by the receiving unit, information stored in the probe information storage unit Based on the above, it is preferable that the following vehicle identify the speed or acceleration of the vehicle that can pass through the intersection.

In the present application, similar to the aspect (12), the probe information stored in the probe information storage unit includes weather information at the time when the position and speed of the vehicle are detected.
The notification device acquires weather information and transmits the acquired weather information to the driving support information providing device. The driving support information providing device receives information such as the position and speed of the vehicle and weather information transmitted from the notification device. And a specific part specifies the speed or acceleration of the said vehicle which a follow vehicle can pass the said intersection based on the received information and the information which a probe information storage part memorize | stores.
According to the notification system configured as described above, the speed or acceleration of the vehicle that allows both the vehicle and the following vehicle to pass through the intersection can be specified based on the past vehicle probe information considering weather information. And the alerting | reporting apparatus can alert | report the information which concerns on driving assistance using the speed or acceleration specified in this way. By considering the weather information, the vehicle and the following vehicle can pass through the intersection more reliably.

(14) The driving support information providing device is configured to transmit predetermined information to the notification device when the specifying unit cannot specify the speed or acceleration of the vehicle, and the notification device provides the driving support information When receiving the speed or acceleration transmitted from the device, the information according to the received speed or acceleration is notified, and when the predetermined information is received, the information according to the calculation result of the calculation unit is notified. preferable.

  In the present application, the driving support information providing device transmits the predetermined information to the notification device when the specifying unit cannot specify the speed or acceleration, for example, when the probe information is insufficient. When receiving the speed or acceleration transmitted from the driving support information providing device, the notification device notifies information according to the received speed or acceleration, and when receiving the predetermined information, the notification device responds to the calculation result of the calculation unit. Broadcast information. That is, when driving support using probe information is possible, driving support according to any one of modes (10) to (13) is performed, and driving support using probe information is impossible. Driving assistance according to any one of modes (1) to (8) is performed.

(15) The information processing apparatus further includes a transmission device that transmits signal information indicating a time until the traffic signal is switched to a stop signal to the notification device, and the notification device receives the signal information transmitted from the transmission device. preferable.

  In the present application, any one of the notification devices according to the aspects (10) to (14) receives the traffic signal information transmitted from the communication device, and exhibits the above-described effects by using the received traffic signal information. Other details are the same as those in the aspect (9).

[Details of the embodiment of the present invention]
A specific example of a notification system according to an embodiment of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a configuration example of a notification system according to Embodiment 1 of the present invention. The notification system according to the first embodiment includes a notification device 1 mounted on a vehicle C, and a traffic signal control device 21 that controls the light color switching of the traffic signal device 2 provided at the intersection A. A following vehicle D travels following the vehicle C behind the vehicle C. The vehicle C is, for example, a guidance vehicle, and the following vehicle D is a large special vehicle. The notification device 1 receives the traffic signal information related to the light color switching by performing wireless communication with the traffic signal control device 21 and provides driving assistance so that both the vehicle C and the following vehicle D can pass through the intersection A. This information is notified to the driver of the vehicle C. The traffic signal control device 21 is an example of a transmission device that transmits traffic signal information to the notification device 1.

  The traffic signal control device 21 includes a microprocessor, a dedicated LSI, a wireless communication device, etc. (not shown). The microprocessor calculates the timing for switching the color of the traffic light 2 and outputs a command to the dedicated LSI. The dedicated LSI operates in accordance with instructions from the microprocessor, and controls the light color switching of the traffic signal device 2. The wireless communication device performs wireless communication with an external communication device, for example, the notification device 1 according to the first embodiment, under the control of the microprocessor. When the microprocessor receives predetermined request information for requesting information indicating the lamp color switching timing by the wireless communication device, the microprocessor transmits the signal information indicating the lamp color switching timing by the wireless communication device. Wireless transmission to the notification device 1.

  FIG. 2 is a block diagram illustrating a configuration example of the notification device 1 according to the first embodiment of the present invention. The notification device 1 is, for example, a computer including a control unit 11 such as a CPU (Central Processing Unit) that controls the operation of each component of the notification device 1, that is, an ECU (Electronic Control Unit). A storage unit 12, a communication unit 13, an input unit 14, and an output unit 15 are connected to the control unit 11 via a bus.

The storage unit 12 includes, for example, a nonvolatile memory and a volatile memory.
The nonvolatile memory is a ROM such as an EEPROM (Electrically Erasable Programmable ROM). The non-volatile memory stores a control program necessary for the initial operation of the computer and a computer program for performing driving support so that both the vehicle C and the following vehicle D can pass through the intersection A.
The volatile memory is a RAM such as a DRAM (Dynamic RAM) and an SRAM (Static RAM), for example, and a control program, a computer program, or a control unit read from the nonvolatile memory when executing the arithmetic processing of the control unit 11 Various data generated by the 11 arithmetic processes are temporarily stored.
The storage unit 12 stores a table 12a that stores information for specifying the inter-vehicle distance between the vehicle C corresponding to the speed of the vehicle C and the following vehicle D that follows the vehicle C. Details of the table 12a will be described later.
The storage unit 12 stores map information 12b including information indicating the position of the intersection A. More specifically, the map information 12b stores image data representing roads and buildings on which the vehicle C travels, information indicating the positions of nodes corresponding to the intersection A, information relating to links connecting the nodes, and the like. ing. The road link is a road section of two adjacent intersections A, and logically constitutes a road on which the vehicle C travels. Each road link is connected by a node corresponding to the intersection A, and logically constitutes a road network.

Note that the storage unit 12 may include devices such as a hard disk drive, a solid state drive, and other disk drives that can read data, and a CD-ROM drive that can read data from a portable recording medium. The computer program is transmitted via a recording medium such as a CD (Compact Disc) -ROM, a DVD (Digital Versatile Disc) -ROM, or a BD (Blu-ray Disc) (registered trademark), which are portable media recorded in a computer-readable manner. It is recorded on hard disk drives and solid state drives. An optical disk is an example of a recording medium, and a computer program may be recorded on a flexible disk, a magnetic optical disk, an external hard disk, a semiconductor memory, or the like so as to be readable by a computer. The computer program according to the present embodiment may be downloaded from an external computer (not shown) connected to the communication network.
The control unit 11 causes the computer to function as the notification device 1 by executing the computer program recorded in the recording medium or the computer program stored in the storage unit 12.

  The communication unit 13 is an interface for transmitting and receiving various types of information to and from the external traffic signal control device 21. Transmission and reception of various types of information by the communication unit 13 is controlled by the control unit 11. For example, the communication unit 13 transmits request information for requesting information indicating the lamp color switching timing of the traffic light 2 to the traffic signal control device 21. And the communication part 13 receives the traffic signal information transmitted from the traffic signal control apparatus 21 in response to the request. The traffic signal information includes information indicating a time until the light color signal of the traffic signal 2 is switched from the progress permission signal to the stop signal. The information may be information that directly indicates the time until switching from the progress permission signal to the stop signal or information that is indirectly indicated.

A position detection unit 16, a speed detection unit 17, and an operation unit 18 are connected to the input unit 14.
The position detection unit 16 is a navigation device, for example. The position detector 16 as a navigation device includes, for example, a GPS (Global Positioning System) receiver. The GPS receiver constitutes a GPS system together with GPS satellites, receives radio waves from artificial satellites, and specifies the position of the navigation device itself, that is, the position of the vehicle C. The position of the vehicle C is represented by latitude and longitude, for example. Further, the position detection unit 16 detects the azimuth of the vehicle C, that is, the traveling direction. A mobile phone having a GPS function, a smartphone, a PND (Portable Navigation Device, Personal Navigation Device), or the like may be used as the navigation device. When the notification device 1 is connected to a gateway via a CAN (Controller Area Network) communication line, the location information may be acquired from a mobile phone or the like via the gateway.
The speed detection unit 17 includes, for example, a magnetic sensor that transmits a signal proportional to the number of rotations of an axle included in the vehicle C, and a counting circuit that measures the number of pulses from the magnetic sensor, and by measuring the number of pulses. The speed of the vehicle C is detected. The magnetic sensor and the counting circuit are examples of the speed detection unit 17 and are not limited to such a structure. For example, the speed detection unit 17 may be configured to acquire information on the position of the vehicle C detected by the position detection unit 16 and detect the speed of the vehicle C based on a change in the position of the vehicle C.
The operation unit 18 includes an operation panel having a touch sensor or the like. The operation panel includes a display unit such as a liquid crystal panel or an organic EL display that displays images of various operation screens, and a button or a touch panel that receives an input to the displayed operation screen. The operation unit 18 receives an operation for setting whether to perform driving support according to the first embodiment. For example, the operation unit 18 displays an operation screen for accepting the necessity of setting the follow-up traveling mode according to the first embodiment on the display unit. The control unit 11 receives an operation for selecting the follow-up traveling mode by the driver via the input unit 14 and the operation unit 18. When the follow mode setting operation is performed, the control unit 11 causes the storage unit 12 to store information indicating that the follow travel mode has been set.

  The notification device 1 is connected to the output unit 15. The notification unit 19 is, for example, a speaker or a display device. The display device is a display device such as a liquid crystal display, an organic EL display, and electronic paper. The control unit 11 can output information related to driving support to the notification unit 19 via the output unit 15 to notify the information by voice or display the information on the display device as an image.

  In the above description, an example in which the position detection unit 16, the speed detection unit 17, the operation unit 18, and the notification unit 19 are connected to the input unit 14 and the output unit 15 of the notification device 1 has been described. An in-vehicle communication unit that performs communication according to a communication protocol such as CAN or LIN (Local Interconnect Network) may be provided. The in-vehicle communication unit transmits / receives various information to / from the position detection unit 16, the speed detection unit 17, the operation unit 18, and the notification unit 19 via a communication line such as CAN or LIN.

  FIG. 3 is a conceptual diagram showing a record layout example of the table 12a according to the first embodiment of the present invention. The table 12a stores the speed of the vehicle C in association with the correction distance corresponding to the speed. The correction distance is a distance corresponding to the inter-vehicle distance between the vehicle C and the following vehicle D. Since the inter-vehicle distance generally depends on the speed of the vehicle C, a different correction distance is associated with each speed of the vehicle C. For example, a correction distance of 25 m is associated with a speed of 40 km / h.

  FIG. 4 is a flowchart showing a notification processing procedure according to the first embodiment of the present invention. The control unit 11 of the notification device 1 determines whether or not the follow-up running mode is set (step S11). Since the storage unit 12 stores information indicating the presence / absence of setting of the follow-up travel mode, is the control unit 11 set to the follow-up travel mode by referring to the information stored in the storage unit 12? It can be determined whether or not. When it determines with it not being in follow-up driving mode (step S11: NO), the control part 11 finishes a process. When it determines with it being following driving mode (Step S11: YES), control part 11 transmits request information to traffic signal control device 2 in communication part 13, and traffic signal 2 provided in intersection A permits passage. The traffic signal information indicating the time until the signal is switched to the stop signal is received by the communication unit 13 (step S12).

  Subsequently, the control part 11 detects the speed of the vehicle C in the speed detection part 17 (step S13). And the control part 11 reads the correction distance corresponding to the speed of the vehicle C detected by step S13 from the table 12a (step S14).

  Subsequently, the control part 11 detects the position and direction of the vehicle C by the position detection part 16 (step S15). Moreover, the control part 11 pinpoints the position of the intersection A using the position of the vehicle C detected by step S15, and the map information 12b which the memory | storage part 12 memorize | stores (step S16). That is, the control unit 11 refers to the map information 12b and specifies the position of the nearest intersection A in the traveling direction of the vehicle C. Next, the control unit 11 calculates the distance between the intersection A and the vehicle C based on the position of the vehicle C detected in step S15 and the position of the intersection A specified in step S16 (step S17). The distance calculated in step S17 is, for example, a linear distance between the intersection A and the vehicle C. Further, when calculating the distance between the intersection A and the vehicle C, the non-linear distance along the road may be calculated in consideration of the map information 12b.

Next, the control unit 11 determines that the vehicle C and the following vehicle D are both at the intersection A based on the traffic signal information acquired at step S12, the correction distance read at step S14, and the distance to the intersection A specified at step S17. The recommended speed of the vehicle C that can pass through is calculated (step S18). For example, the recommended speed is represented by the following formula (1) (see FIG. 1).
z = (y + Δy) / Δt (1)
However,
z: Recommended speed y: Distance between the intersection A and the vehicle C Δy: Correction distance according to the speed of the vehicle C Δt: Time until the traffic signal 2 switches from the traffic permission signal to the stop signal

  Next, the control unit 11 determines whether or not the current speed of the vehicle C detected in step S13 is equal to or higher than the recommended speed (step S19). When it determines with it being more than a recommended speed (step S19: YES), the control part 11 finishes a process.

  When it determines with it being less than a recommended speed (step S19: NO), the control part 11 determines whether a recommended speed is below a legal speed (step S20). The legal speed is stored in the storage unit 12 as a predetermined speed. In addition, when considering the legal speed which changes with roads, it is good to comprise so that the memory | storage part 12 memorize | stores the legal speed in association with each road link as the map information 12b. In this case, the control unit 11 reads the legal speed corresponding to the road link on which the vehicle C is traveling from the map information 12b based on the position of the vehicle C detected in step S15, and executes the determination process of step S20. Just do it.

  When it determines with it being below legal speed (step S20: YES), the control part 11 determines whether it can accelerate to a recommended speed safely (step S21). For example, the control unit 11 determines whether or not it is possible to accelerate safely by determining whether or not the difference between the recommended speed and the current speed of the vehicle C detected in step S13 is a predetermined speed difference or less. Determine whether. Further, it is possible to accelerate safely by determining a value obtained by dividing the difference between the recommended speed and the speed of the vehicle C by the time until the traffic signal 2 switches to the stop signal, that is, whether the acceleration is equal to or less than a predetermined acceleration. It may be determined whether or not it is possible.

  When it determines with being able to accelerate safely (step S21: YES), the control part 11 alert | reports the information according to the calculation result of the recommended speed to the driver | operator of the vehicle C in the alerting | reporting part 19 (step S22). ) Finish the process. For example, the control unit 11 displays on the display unit that the vehicle C should be accelerated or notifies the driver by voice. The control unit 11 may be configured to notify the specific recommended speed by the notification unit 19. Furthermore, you may comprise so that a driver | operator may be alert | reported by the alerting | reporting part 19 about the required degree of acceleration.

  If it is determined in step S20 that the recommended speed exceeds the legal speed (step S20: NO), or if it is determined in step S21 that the vehicle cannot be safely accelerated (step S21: NO), the control unit 11 Then, the notification unit 19 notifies the driver of the vehicle C that the vehicle should stop before the intersection A (step S23), and the process ends.

  According to the notification system and the notification device 1 according to the first embodiment, when the follower vehicle D travels following the vehicle C, the recommended speed necessary for the vehicle C and the follower vehicle D to pass through the intersection A is calculated. Then, information related to driving support based on the recommended speed can be notified to the driver of the vehicle C.

  Moreover, since the table 12a in which the speed of the vehicle C is associated with the distance according to the speed is provided, the notification device 1 more accurately determines the recommended speed at which the vehicle C and the following vehicle D can pass through the intersection A. Can be calculated.

  Furthermore, if the notification device 1 does not accelerate and the vehicle C and the following vehicle D cannot pass the intersection A, the notification unit 19 can notify the driver of the vehicle C that it should accelerate. Both the vehicle C and the following vehicle D can pass through the intersection A without being forced to stop at the intersection A due to the notification of acceleration.

  Furthermore, when the recommended speed exceeds the legal speed, the notification device 1 notifies the driver of the vehicle C that it should stop before the intersection A. By the notification of the stop, the vehicle C and the following vehicle D can be safely stopped before the intersection A.

  Furthermore, even if the recommended speed is equal to or lower than the legal speed, when it is necessary to accelerate the vehicle C at a dangerous acceleration, the notification unit 19 notifies the driver of the vehicle C that it should stop at the intersection A. . The vehicle C and the following vehicle D can safely stop before the intersection A without performing dangerous acceleration.

(Embodiment 2)
The notification device 1 according to the second embodiment calculates the recommended speed using the correction distance depending on the type of the following vehicle D as well as the speed of the vehicle C, and performs driving support. Since the notification device 1 according to the second embodiment is different from the first embodiment in the configuration of the table 212a and the processing content of the control unit 11, the following mainly describes the differences. Since other configurations and operational effects are the same as those of the first embodiment, the corresponding portions are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 5 is a conceptual diagram showing a record layout example of the table 212a according to the second embodiment of the present invention. The table 212a stores the speed of the vehicle C and a correction distance corresponding to the speed in association with each other, and the correction distance stores a value of a correction distance that is different for each type of the following vehicle D. The type of the following vehicle D is a classification corresponding to the size or weight of the following vehicle D, for example. In the second embodiment, there are three types of “normal”, “medium”, and “large”. Since the necessary inter-vehicle distance generally depends on the size or weight of the following vehicle D, different correction distances are associated with the speed and type of the following vehicle D. For example, a speed of 40 km / h is associated with 20 m for the type “normal”, 25 m for the type “medium”, and 30 m for the type “large”. In short, the table 212a stores a correction distance whose value increases as the weight of the following vehicle D increases.

  The operation unit 18 displays an operation screen for accepting the type of the following vehicle D together with the setting of the following traveling mode on the display unit. The control unit 11 receives a selection operation of the following traveling mode and the type of the following vehicle D by the driver via the input unit 14 and the operation unit 18. When the setting operation of the following mode and the type of the following vehicle D is performed, the control unit 11 causes the storage unit 12 to store information indicating that the type of the following vehicle D and the following traveling mode are set.

  In step S14 shown in FIG. 4, the control unit 11 reads a correction distance corresponding to the speed of the vehicle C detected in step S13 and the type of the following vehicle D stored in the storage unit 12. The other processing procedures are the same as the processing procedures shown in FIG.

  According to the notification system and the notification device 1 according to the first embodiment configured as described above, the recommended speed at which both the vehicle C and the tracking vehicle D can pass through the intersection A based on the correction distance according to the type of the tracking vehicle D. Therefore, the driver can be notified of information related to more accurate driving support. That is, the vehicle C and the following vehicle D can pass through the intersection A more reliably and safely.

(Embodiment 3)
The notification device 1 according to the third embodiment calculates a recommended acceleration for both the vehicle C and the following vehicle D to pass through the intersection A, not the recommended speed. Since the notification device 1 according to the third embodiment differs from the first and second embodiments in the processing content of the control unit 11, the following mainly describes the differences. Since other configurations and operational effects are the same as those of the first and second embodiments, corresponding portions are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 6 is a flowchart showing a notification processing procedure according to the third embodiment of the present invention. The control part 11 performs the process similar to step S11-step S17 demonstrated in Embodiment 1 in step S311-step S317. After completing the process of step S317, the control unit 11 determines the vehicle C and the following vehicle based on the traffic signal information acquired in step S312 and the correction distance read in step S314 and the distance to the intersection A specified in step S317. A recommended acceleration necessary for both D to pass through the intersection A is calculated (step S318). For example, the recommended acceleration is expressed by the following formula (2). Here, it is assumed that the vehicle C gradually accelerates until the intersection A is reached. Note that δ is, for example, 2 to 3 seconds.
α = 2 (y + Δy) / (Δt−δ) ² −2v · Δt / (Δt−δ) ² (2)
However,
α: Recommended acceleration y: Distance between intersection A and vehicle C Δy: Correction distance according to speed of vehicle C v: Current speed of vehicle C Δt: Until traffic signal 2 switches from a traffic permission signal to a stop signal Time δ: A predetermined time required for the driver to start accelerating the vehicle C after notification

  Next, the control unit 11 determines whether or not the recommended acceleration calculated in step S318 is positive (step S319). When it is determined that the recommended acceleration is not positive (step S319: NO), the control unit 11 ends the process.

When it is determined that the recommended acceleration is positive (step S319: YES), the control unit 11 determines whether the speed after acceleration is equal to or lower than the legal speed (step S320).
The speed after acceleration is expressed by the following formula (3).
V = v + α × (Δt−δ) (3)

  When it determines with the speed after acceleration being below legal speed (step S320: YES), the control part 11 determines whether an acceleration is below a predetermined acceleration (step S321). The predetermined acceleration is an upper limit acceleration that can safely accelerate the vehicle C, and is stored in advance in the storage unit 12.

  When it is determined that the recommended acceleration is equal to or less than the predetermined acceleration (step S321: YES), the control unit 11 notifies the driver of the vehicle C of information according to the calculation result of the recommended acceleration by the notification unit 19 (step S311: YES). S322), the process ends.

  When it is determined in step S320 that the speed after acceleration exceeds the legal speed (step S320: NO), or when it is determined in step S321 that the recommended acceleration exceeds the predetermined acceleration (step S321: NO). And the control part 11 alert | reports to the driver | operator of the vehicle C that the alerting | reporting part 19 should stop before the intersection A (step S323), and complete | finishes a process.

  According to the notification system and the notification device 1 according to the third embodiment, when the following vehicle D follows the vehicle C, the recommended acceleration necessary for the vehicle C and the following vehicle D to pass through the intersection A is calculated. Information related to driving support based on the recommended acceleration can be notified to the driver of the vehicle C.

  In addition, when the recommended acceleration is positive, the notification device 1 can notify the driver of the vehicle C that the notification unit 19 should accelerate. Both the vehicle C and the following vehicle D can pass through the intersection A without being forced to stop at the intersection A due to the notification of acceleration.

  Furthermore, when the speed of the vehicle C after acceleration exceeds the legal speed, the notification device 1 notifies the driver of the vehicle C that it should stop before the intersection A. By the notification of the stop, the vehicle C and the following vehicle D can be safely stopped before the intersection A.

  Furthermore, when the recommended acceleration is equal to or higher than the predetermined acceleration, that is, when it is necessary to accelerate the vehicle C with dangerous acceleration, the notification unit 19 notifies the driver of the vehicle C that the vehicle should stop at the intersection A. . The vehicle C and the following vehicle D can safely stop before the intersection A without performing dangerous acceleration.

  In the first to third embodiments, the notification device 1 receives the traffic signal information from the signal control device. However, the traffic signal information may be received from another communication device having the traffic signal information. The other communication device is, for example, an in-vehicle wireless communication device of another vehicle that can acquire traffic signal information from the signal control device 21 or a portable wireless communication device carried by a pedestrian. The in-vehicle wireless communication device and the portable wireless communication device acquire signal information from the signal control device 21 and transmit the acquired signal information to the notification device. The notification device 1 can receive the traffic signal information transmitted from the in-vehicle wireless communication device and the portable wireless communication device by inter-vehicle communication and inter-pedal communication. Moreover, you may comprise so that the alerting apparatus 1 may receive signal information from the communication apparatus installed in the center center which manages operation | movement of the traffic signal apparatus 2. FIG.

  In the first to third embodiments, an example in which the storage unit 12 stores information indicating the position of an intersection in advance has been described. However, the notification device 1 uses information on the position of an intersection transmitted from an external communication device. The information may be received and the received information may be stored in the storage unit 12. For example, the signal control device stores information indicating the position of the intersection where the signal control device is installed, and transmits information on the position of the intersection to the notification device in response to the request from the notification device 1. The notification device 1 may receive information on the position of the intersection transmitted from the signal control device, and store the received information in the storage unit 12.

(Embodiment 4)
As in the first embodiment, the notification system according to the fourth embodiment includes a notification device 401 and a traffic signal control device 21, and further includes a driving support information providing device 403 (see FIGS. 1 and 7). The driving support information providing device 403 uses the probe information 432a of a plurality of vehicles that have passed through the intersection A in the past to notify information related to driving support for both the vehicle C and the following vehicle D to pass through the intersection A. It is a device to provide to. The notification device 401 performs driving support by selectively using information related to driving support obtained by the processing procedure according to the first embodiment and information provided from the driving support information providing device 403.
Since the notification system according to the fourth embodiment is different from the first embodiment in the configuration and processing procedure related to the communication of the driving support information providing device 403 and the notification device 401 and the driving support information providing device 403, the following mainly relates to the difference. Explain the point. Since other configurations and operational effects are the same as those of the first embodiment, the corresponding portions are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 7 is a block diagram showing a configuration example of a notification device 401 according to Embodiment 4 of the present invention. The notification device 401 according to the fourth embodiment includes a control unit 11, a storage unit 12, a first communication unit 413a, a second communication unit 413b, an input unit 14, and an output unit 15. The configuration of the first communication unit 413a is the same as that of the communication unit 13 of the first embodiment.
The second communication unit 413b is a communication device for wirelessly transmitting / receiving various types of information related to driving support to / from the driving support information providing apparatus 403. Transmission / reception of various types of information by the second communication unit 413b is performed by the control unit 11. Controlled by. For example, the second communication unit 413b receives the speed of the vehicle C detected by the speed detection unit 17, the position and orientation of the vehicle C detected by the position detection unit 16, and the traffic signal information received by the first communication unit 413a. Information that requests the recommended speed is transmitted to the driving support information providing apparatus 403. And the 2nd communication part 413b receives the information which concerns on the driving assistance transmitted from the driving assistance information provision apparatus 403 according to the request | requirement. The control part 11 performs the alerting | reporting process which concerns on driving assistance using the information received in the 2nd communication part 413b.

  FIG. 8 is a block diagram showing a configuration example of the driving support information providing apparatus 403 according to Embodiment 4 of the present invention. The driving support information providing device 403 is a computer including a control unit 431 having, for example, a CPU and a memory. A probe information storage unit 432 and a wireless communication unit 433 are connected to the control unit 431.

The wireless communication unit 433 is a communication device for wirelessly transmitting / receiving various information related to driving support to / from the notification device 401, and transmission / reception of various information by the wireless communication unit 433 is controlled by the control unit 431.
The wireless communication unit 433 receives probe information 432a transmitted from an in-vehicle wireless device mounted on a vehicle (not shown). The in-vehicle wireless device acquires the position and speed periodically detected by the vehicle in which the in-vehicle wireless device is mounted, and the traffic signal information. The traffic signal information can be acquired from the traffic signal control device 21. The in-vehicle wireless device supports driving of probe information 432a including the ID unique to the in-vehicle wireless device or the vehicle, the acquired position and speed, the time when the position and speed are detected, the vehicle type, and the traffic signal information. Transmit to the information providing apparatus 403. The control unit 431 receives the probe information 432a transmitted from the in-vehicle wireless device by the wireless communication unit 433, and stores the received probe information 432a in the probe information storage unit 432.

  The probe information storage unit 432 is a non-volatile memory such as a magnetic disk, for example, an EEPROM. The probe information storage unit 432 collects and stores probe information 432a transmitted from a plurality of vehicles that have passed through the intersection A in the past. Further, the probe information storage unit 432 stores the same table and map information as the notification device 401 as information for grasping the positional relationship between the vehicle C and the following vehicle D and the intersection A.

  FIG. 9 is a conceptual diagram showing an example of probe information 432a according to Embodiment 4 of the present invention. The probe information 432a stores an ID unique to the vehicle C, a vehicle type of the vehicle C, a position and speed of the vehicle C, a time when the position and speed are detected, and traffic light information in association with each other. . The driving support information providing apparatus 403 may continuously collect the probe information 432a in real time, store the collected probe information 432a in the probe information storage unit 432, or statically collect the probe information 432a collected in the past. The structure may be stored.

10 and 11 are flowcharts showing a notification processing procedure according to the fourth embodiment of the present invention. The control part 11 of the alerting | reporting apparatus 401 performs mode determination in step S411-step S413 similarly to step S11-step S13 of Embodiment 1, acquires traffic signal information, and detects the speed of the vehicle C. And the control part 11 detects the position and azimuth | direction of the vehicle C in the position detection part 1616 (step S414). Next, the control unit 11 includes the speed of the vehicle C detected by the speed detection unit 17, the position and orientation of the vehicle C detected by the position detection unit 16, and the traffic signal information received by the first communication unit 413a. Information requesting the recommended speed is transmitted to the driving support information providing apparatus 403 by the second communication unit 413b (step S415).
The driving support information providing apparatus 403 transmits driving support information to the notification apparatus 401 in response to the request transmitted in the process of step S415. The driving support information providing device 403 uses the accumulated probe information 432a to identify the recommended speed of the vehicle C that allows both the vehicle C and the following vehicle D to pass through the intersection A, and notifies the driving support information including the specified recommended speed. Send to device 401. When it is determined that both the vehicle and the following vehicle D cannot pass through the intersection A, the driving support information providing device 403 transmits driving support information including a stop instruction to the notification device 401. When the recommended speed cannot be specified due to insufficient accumulation of the probe information 432a, the driving support information providing device 403 transmits driving support information including predetermined information indicating the fact to the notification device 401. Details of the processing of the driving support information providing apparatus 403 will be described later.

  The control unit 11 of the notification device 401 receives the driving support information transmitted from the driving support information providing device 403 (step S416), and determines whether or not the driving support information includes predetermined information (step S417). That is, the control unit 11 determines whether or not the recommended speed has failed to be specified.

  When it is determined that the driving support information does not include the predetermined information (step S417: NO), that is, when the recommended speed or the stop instruction is included in the driving support information, the control unit 11 is based on the driving support information. The recommended speed is notified, or the vehicle C is notified that it should be stopped (step S418), and the process ends.

  When it determines with driving assistance information including predetermined information (step S417: YES), the control part 11 performs the process similar to step S14 of Embodiment 1, and step S16-step S23 in step S419-step S427. Run.

Next, a processing procedure of the driving support information providing apparatus 403 will be described.
FIG. 12 is a flowchart showing a processing procedure related to provision of driving support information. The control unit 431 receives the information related to the recommended speed request transmitted from the notification information by the process of step S415 (step S451). The information includes the speed, position and direction of the requesting vehicle C, and traffic signal information.

  Next, the control unit 431 refers to map information (not shown) and specifies the position of the nearest intersection A in the traveling direction of the vehicle C (step S452). And the control part 431 estimates the position of the tracking vehicle D (step S453). For example, the control unit 431 specifies the position of the following vehicle D using the correction distance stored in the table. The correction distance is the same as that described in the first embodiment, and is a distance corresponding to the inter-vehicle distance between the vehicle C and the following vehicle D. That is, the control unit 431 estimates that the following vehicle D is traveling at a position away from the vehicle C by a correction distance in a direction opposite to the traveling direction of the vehicle C.

  Next, the control unit 431 extracts probe information 432a of a vehicle in a situation similar to the current vehicle C and the following vehicle D from the probe information 432a accumulated in the probe information storage unit 432 (step S454). That is, the control unit 431 determines the current position and speed of the vehicle C and the following vehicle D, the distance to the intersection A, the time until the traffic signal 2 is switched from the passage permission signal to the stop signal, and the like. To extract. The speed of the following vehicle D may be estimated as the same speed as the vehicle C traveling in front of it.

  Next, the control unit 431 excludes the probe information 432a of the vehicle that is rapidly accelerating or decelerating from the extracted probe information 432a (step S455). Sudden acceleration means acceleration that is equal to or greater than a predetermined first threshold value, and rapid deceleration is acceleration that is less than a predetermined second threshold value. Then, the control unit 431 determines whether or not the number of samples related to the finally extracted probe information 432a is sufficient (step S456). Here, as an example, a set of probe information 432a of two vehicles about to pass through the intersection A is taken as one sample. Whether the number of samples is sufficient may be determined simply by comparing a predetermined threshold value with the number of samples, or may be configured to determine whether the number of samples is statistically sufficient. good.

  If it is determined that the number of samples is sufficient (step S456: YES), the recommended speed is specified based on the extracted sample information (step S457). The recommended speed is a speed at which two vehicles similar to the vehicle C and the following vehicle D can pass through the intersection A. When there are a plurality of speeds that can pass through the intersection A, a speed close to the current speed of the vehicle C may be specified as the recommended speed. The recommended speed is set to 0 when there are no two vehicles that can both pass through the intersection A, or when the vehicle cannot be safely accelerated from the current speed of the vehicle C to a speed that can pass through the intersection A.

  Next, the control unit 431 transmits the driving support information including the recommended speed or the stop instruction specified in step S457 to the notification device 401 using the wireless communication unit 433 (step S458), and ends the process. When the recommended speed is not 0, the control unit 431 transmits driving support information including the recommended speed. When the recommended speed is 0, the control unit 431 transmits driving support information including a stop instruction.

  When it is determined in step S456 that the number of samples is insufficient (step S456: NO), the control unit 431 notifies the wireless communication unit 433 of driving support information including predetermined information indicating that the estimated speed cannot be specified. The data is transmitted to the apparatus 401 (step S459), and the process is finished.

According to the notification system and the notification device 401 according to the fourth embodiment configured as described above, the vehicle C and the following vehicle D are both intersections using the probe information 432a of the vehicle that has passed through the intersection A in the past. The speed of the vehicle C that can pass through A can be specified, and driving assistance can be performed. That is, the notification device 401 notifies information related to driving support of the leading vehicle C so that both the vehicle C and the following vehicle D can pass through the intersection A using the speed specified by using the probe information 432a. Can do.
Since the recommended speed is specified using the probe information 432a of the vehicle that has actually passed through the intersection A, the success probability that both the vehicle C and the following vehicle D pass the intersection A can be improved.

  Further, when the recommended speed cannot be specified due to the lack of the probe information 432a accumulated in the probe information storage unit 432, the notification device 401 can calculate the recommended speed and perform driving support by the same processing as in the first embodiment. it can.

In the fourth embodiment, the recommended speed is calculated as a modification of the first embodiment. However, the recommended speed may be calculated by the processing method of the second embodiment, or the processing method of the third embodiment may be used. The recommended acceleration may be calculated. Similarly, although the example in which the driving support information providing device 403 specifies the recommended speed has been described, it goes without saying that the recommended acceleration may be specified so that both vehicles can pass through the intersection A. good.
Further, the configuration in which the probe information includes the traffic signal information has been described. However, if the amount and accuracy of the probe information is sufficient, the probe information that does not include the traffic signal information can be used. In this case, the control unit 431 may estimate the time until the lamp color signal of the traffic signal device 2 switches from the travel permission signal to the stop signal based on the position and speed of the vehicle included in the probe information.

(Embodiment 5)
The notification system according to the fifth embodiment includes a notification device 401, a traffic signal control device 21, and a driving support information providing device 403 similar to those of the fourth embodiment (see FIGS. 1 and 7). The notification system according to the fifth embodiment calculates a recommended speed corresponding to the vehicle type of the following vehicle D and performs driving support. Since the notification device 401 and the driving support information providing device 403 according to the fifth embodiment are mainly different in processing content from the fifth embodiment, the following mainly describes the differences. Since other configurations and operational effects are the same as those of the fourth embodiment, the corresponding portions are denoted by the same reference numerals and detailed description thereof is omitted.

  As with the second embodiment, the notification device 401 according to the fifth embodiment receives the vehicle type of the following vehicle D through the operation unit 18. The storage unit 12 stores information indicating the received vehicle type of the following vehicle D.

  The main processing procedure of the notification device 401 is the same as that of the fourth embodiment. However, in step S415, the control unit 11 includes the vehicle type of the following vehicle D in addition to the speed, position and direction of the vehicle C and traffic signal information. Information requesting the recommended speed is transmitted to the driving support information providing apparatus 403 by the second communication unit 413b.

  The driving support information providing apparatus 403 receives information related to the recommended speed request transmitted from the notification apparatus 401 in this way. The main processing content of the driving support information providing apparatus 403 is the same as that of the fourth embodiment, but in step S454, the control unit 11 is similar to the current vehicle C and the following vehicle D in consideration of the vehicle type of the following vehicle D. The probe information 432a of the vehicle in the situation is extracted. That is, the control unit 431 is similar in the current position and speed of the vehicle C and the following vehicle D, the distance to the intersection A, the time until the traffic signal 2 switches from the traffic permission signal to the stop signal, the vehicle type of the following vehicle D, and the like. The probe information 432a of the two-vehicle set to be extracted is extracted. Other processes are the same as those in the fourth embodiment.

According to the notification system and the notification device 401 according to the fifth embodiment configured as described above, the vehicle information and the following vehicle D can both pass through the intersection A by using the probe information 432a in consideration of the vehicle type of the following vehicle D. The speed of the vehicle C can be specified and driving assistance can be performed.
Since the vehicle type of the following vehicle D is considered, the success probability that both the vehicle C and the following vehicle D pass the intersection A can be improved.

  In the fifth embodiment, when the notification device 401 calculates the recommended speed, the recommended speed may be calculated using the processing method of the second embodiment. Further, the recommended acceleration may be calculated by the processing method of the third embodiment. Similarly, the driving assistance information providing apparatus 403 may be configured to identify a recommended acceleration that allows two vehicles to pass through the intersection A in consideration of the vehicle type of the following vehicle D.

  Further, in the fifth embodiment, the example in which the weight of the following vehicle D is indirectly considered according to the vehicle type has been described. However, the weight of the following vehicle D may be directly considered. For example, the notification device 401 receives the weight of the following vehicle D at the operation unit 18, and the driving support information providing device 403 analyzes the behavior of the vehicle related to the probe information 432 a based on the probe information 432 a and calculates the weight of the vehicle. You can estimate. Then, the driving assistance information providing device 403 extracts the probe information 432a of the two vehicles that are in a situation similar to the currently traveling vehicle C and the following vehicle D, and whose weights of the following vehicle D are similar, and the recommended speed Or, specify the recommended acceleration.

(Embodiment 6)
FIG. 13 is a block diagram showing a configuration example of a notification device 601 according to Embodiment 6 of the present invention. As in the fourth embodiment, the notification system according to the fifth embodiment includes a notification device 601, a traffic signal control device 21 (see FIG. 1), and a driving support information providing device 603, and further includes a weather information providing device 604. The notification system according to the sixth embodiment performs driving support in consideration of weather information that affects acceleration and deceleration of the vehicle C and the following vehicle D. Since the notification system according to the sixth embodiment is mainly different in the processing contents of the notification device 601 and the driving support information providing device 603, the following mainly describes the differences. Since other configurations and operational effects are the same as those of the first embodiment, the corresponding portions are denoted by the same reference numerals, and detailed description thereof is omitted.

  The weather information providing device 604 is a device that transmits weather information in response to a request from the notification device 601 or the driving support information providing device 603.

  The notification device 601 includes a control unit 11, a storage unit 12, a first communication unit 613 a, a second communication unit 613 b, an input unit 14, and an output unit 15 similar to those in the fourth embodiment. The second communication unit 613b can communicate with the weather information providing apparatus 604 and receives the weather information transmitted from the weather information providing apparatus 604.

  The configuration of the driving support information providing apparatus 603 is the same as that of the fourth embodiment, and the wireless communication unit 433 can receive weather information transmitted from the weather information providing apparatus 604. The probe information storage unit 432 according to the sixth embodiment stores probe information 632a including weather information.

  FIG. 14 is a conceptual diagram showing an example of probe information 632a according to Embodiment 6 of the present invention. The probe information 632a includes an ID unique to the vehicle C, a vehicle type of the vehicle C, a position and speed of the vehicle C, a time when the position and speed are detected, traffic light information, and weather information at the time and position. Are stored in association with each other.

  When the driving support information providing apparatus 603 receives the probe information 632a that does not include the weather information transmitted from the in-vehicle wireless device, the driving support information providing apparatus 603 requests the weather information providing apparatus 604 for the weather information at the position and time of the vehicle included in the probe information 632a. The weather information transmitted from the weather information providing apparatus 604 may be added to the probe information 632a. Needless to say, the in-vehicle wireless device may acquire the weather information and transmit the probe information 632a including the acquired weather information to the driving support information providing apparatus 603.

  The main processing procedure of the notification device 601 is the same as that of the fourth embodiment, but the following processing is different from that of the fourth embodiment. The control unit 11 requests the weather information providing device 604 for weather information at the current position and time of the vehicle C, and receives the weather information transmitted from the weather information providing device 604 in response to the request. Then, in step S415, the control unit 11 includes, in the second communication unit 613b, information that includes the weather information and requests the recommended speed in addition to the speed, position, direction, and traffic signal information of the vehicle C. To 603.

  The driving support information providing device 603 receives the information related to the request for the recommended speed transmitted from the notification information in this way. The main processing content of the driving support information providing apparatus 603 is the same as that of the fourth embodiment. However, in step S454, the control unit 11 considers the received weather information and is similar to the current vehicle C and the following vehicle D. The probe information 632a of the vehicle in the situation is extracted. That is, the control unit 431 has two sets of similar weather information, the current position and speed of the vehicle C and the following vehicle D, the distance to the intersection A, the time until the traffic signal 2 switches from the traffic permission signal to the stop signal, Vehicle probe information 632a is extracted. Other processes are the same as those in the fourth embodiment.

According to the notification system and notification device 601 according to the sixth embodiment configured as described above, the vehicle C and the following vehicle D can both pass through the intersection A using the probe information 632a in consideration of weather information. The speed of the vehicle can be specified and driving assistance can be performed.
Since the weather information is considered, the success probability that both the vehicle C and the following vehicle D pass the intersection A can be improved.

In addition, although the above-mentioned Embodiment 6 demonstrated the example in which the alerting | reporting apparatus 601 acquires the weather information in the position of the vehicle C, you may comprise so that the driving assistance information provision apparatus 603 may acquire weather information. That is, the notification device 601 does not include the weather information and transmits information related to the request for the recommended speed to the driving support information providing device 603 as in the fourth embodiment. The driving support information providing device 603 receives the information transmitted from the notification device 601 and requests the weather information providing device 604 for weather information based on the position and time of the vehicle C included in the received information. Then, the driving support information providing device 603 receives the weather information transmitted from the weather information providing device 604, and in step S454, the control unit 431 considers the weather information and the current vehicle C and the following vehicle D. Probe information 632a of a vehicle in a similar situation is extracted.
Even in the notification system and the notification device 601 configured as described above, the probe information 632a is used in consideration of weather information, and the speed of the vehicle C at which both the vehicle C and the following vehicle D can pass the intersection A is specified. Driving assistance can be performed.

1, 401, 601 Notification device 2 Traffic signal 11 Control unit 12 Storage unit 12a, 212a Table 12b Map information 13 Communication unit 413a, 613a First communication unit 413b, 613b Second communication unit 14 Input unit 15 Output unit 16 Position detection unit DESCRIPTION OF SYMBOLS 17 Speed detection part 18 Operation part 19 Notification part 21 Signal control apparatus 403,603 Driving assistance information provision apparatus 431 Control part 432 Probe information storage part 432a, 632a Probe information 433 Wireless communication part 604 Weather information provision apparatus A Intersection C Vehicle D Tracking vehicle

Claims (15)

A speed detector for detecting the speed of the vehicle;
A position detector for detecting the position of the vehicle;
A storage unit for storing the position of the intersection;
A distance calculation unit that calculates a distance between the intersection and the vehicle based on the position of the intersection stored in the storage unit and the position of the vehicle detected by the position detection unit;
A communication unit for receiving traffic signal information indicating a time until a traffic signal provided at the intersection is switched to a stop signal;
Based on the distance obtained by adding the distance according to the distance between the following vehicle and the vehicle following the vehicle to the distance calculated by the distance calculation unit, and the traffic signal information received by the communication unit. A calculation unit that calculates a speed or acceleration of the vehicle that allows the vehicle to pass through the intersection;
An informing device comprising: an informing unit that informs a driver of the vehicle of information according to a calculation result of the calculating unit. A table that associates the speed of the vehicle with a distance according to the speed;
The calculation unit includes:
The notification device according to claim 1, wherein the speed or acceleration of the vehicle at which the following vehicle can pass the intersection is calculated based on a distance corresponding to the speed detected by the speed detection unit. An acceleration necessity determining unit that determines whether the speed detected by the speed detecting unit is equal to or higher than the speed calculated by the calculating unit;
The notification unit
The notification device according to claim 1 or 2, wherein when the acceleration necessity determination unit determines that the acceleration is not required, the acceleration of the vehicle is notified. A threshold determination unit that determines whether the speed calculated by the calculation unit is equal to or less than a predetermined threshold;
The notification unit
The notification device according to claim 3, wherein, when the threshold determination unit determines NO, the notification of the stop of the vehicle is performed regardless of a determination result of the acceleration necessity determination unit. Based on the difference between the speed calculated by the calculation unit and the speed detected by the speed detection unit, an acceleration propriety determination unit that determines whether or not acceleration is possible is provided.
The notification unit
The notification device according to claim 3 or 4, wherein when the acceleration determination unit determines that the acceleration is impossible, the vehicle stop is notified regardless of a determination result of the acceleration necessity determination unit. A positive / negative determining unit that determines whether the acceleration calculated by the calculating unit is positive or negative;
The notification unit
The notification device according to claim 1, wherein when the positive / negative determination unit determines that the vehicle is positive, the vehicle is notified of acceleration. A threshold determination unit that determines whether the speed after acceleration by the acceleration calculated by the calculation unit is equal to or less than a predetermined threshold;
The notification unit
The notification device according to claim 6, wherein, when the threshold determination unit determines NO, the notification device notifies the stop of the vehicle regardless of the determination result of the positive / negative determination unit. An acceleration propriety determination unit that determines whether or not acceleration is possible based on the acceleration calculated by the calculation unit;
The notification unit
The notification device according to claim 6 or 7, wherein when the acceleration propriety determining unit determines that the acceleration is impossible, the vehicle stop is notified regardless of the determination result of the positive / negative determining unit. The notification device according to any one of claims 1 to 8,
A transmission device that transmits signal information indicating a time until the traffic signal is switched to a stop signal to the notification device, and
The notification device
A notification system for receiving traffic signal information transmitted from the transmission device. The notification device according to any one of claims 1 to 8, and a driving support information providing device that provides the notification device with information related to driving support for allowing both the vehicle and the following vehicle to pass through an intersection. The notification device is a notification system that notifies the driver of the vehicle of information provided from the driving support information providing device,
The driving support information providing device includes:
A probe information storage unit that stores probe information including positions and speeds at a plurality of times of each of a plurality of vehicles that have passed through the intersection in the past,
The notification device
A transmission unit that transmits the vehicle speed detected by the speed detection unit, the vehicle position detected by the position detection unit, and the traffic signal information received by the communication unit to the driving support information providing apparatus; ,
The driving support information providing device includes:
A receiver that receives the speed, position, and traffic signal information transmitted from the notification device;
A specifying unit for specifying the speed or acceleration of the vehicle at which the following vehicle can pass through the intersection based on the speed, position and traffic signal information received by the receiving unit, and information stored in the probe information storage unit; Prepared,
A notification system that provides information on the speed or acceleration specified by the specifying unit to the notification device. The notification device according to any one of claims 1 to 8, and a driving support information providing device that provides the notification device with information related to driving support for allowing both the vehicle and the following vehicle to pass through an intersection. The notification device is a notification system that notifies the driver of the vehicle of information provided from the driving support information providing device,
The driving support information providing device includes:
Provided with a probe information storage unit that stores probe information including vehicle types of a plurality of vehicles that have passed through the intersection in the past, positions and speeds at a plurality of times of each vehicle,
The notification device
A reception unit for receiving the vehicle type of the following vehicle;
Providing the driving support information including the vehicle speed detected by the speed detection unit, the vehicle position detected by the position detection unit, the traffic signal information received by the communication unit, and the vehicle type received by the reception unit A transmission unit for transmitting to the device;
The driving support information providing device includes:
A receiving unit for receiving the speed, position, signal information and vehicle type transmitted from the notification device;
Based on the speed, position, traffic signal information and vehicle type received by the receiving unit, and information stored in the probe information storage unit, a specifying unit that specifies the speed or acceleration of the vehicle at which the following vehicle can pass the intersection And
A notification system that provides information on the speed or acceleration specified by the specifying unit to the notification device. The probe information includes weather information when the position and speed of the vehicle are detected,
The driving support information providing device includes a weather information acquisition unit that acquires weather information,
The specific part is:
Based on the information received by the receiving unit, the information stored in the probe information storage unit, and the weather information acquired by the weather information acquisition unit, the speed or acceleration of the vehicle at which the following vehicle can pass the intersection The notification system according to claim 10 or claim 11. The probe information includes weather information when the position and speed of the vehicle are detected,
The notification device includes an acquisition unit that acquires weather information, the transmission unit transmits weather information acquired by the acquisition unit, and the reception unit receives weather information transmitted by the transmission unit. And
The specific part is:
The speed or acceleration of the vehicle in which the following vehicle can pass the intersection based on information received by the receiving unit and information stored in the probe information storage unit. Notification system. The driving support information providing device includes:
When the identification unit cannot identify the speed or acceleration of the vehicle, predetermined information is transmitted to the notification device,
The notification device
When the speed or acceleration transmitted from the driving support information providing device is received, information according to the received speed or acceleration is notified, and when the predetermined information is received, information according to the calculation result of the calculation unit The notification system according to any one of claims 10 to 13. Further comprising a transmitter for transmitting signal information indicating the time until the traffic signal is switched to a stop signal to the notification device;
The notification device
The notification system according to claim 10, wherein the traffic signal information transmitted from the transmission device is received.

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