JP2020134151A - In-vehicle system, recommended travelling information determination device, recommended travelling information determination system, method for acquiring recommended travelling information, method for determining recommended travelling information, and computer program - Google Patents

Abstract

To provide an in-vehicle system which can acquire appropriate recommended information regarding travelling of a vehicle for each vehicle.SOLUTION: The in-vehicle system is a system equipped in a vehicle, and includes: a vehicle information provision unit for providing, to a server, tire information showing the performance of a tire equipped in the vehicle and start point information and destination information showing the point of start and the destination of the vehicle, respectively; and a recommended travelling information acquisition unit for acquiring, from the server, recommended travelling information as recommended information regarding travelling from the point of start to the destination determined by the tire information of the vehicle, the start point information and the destination information, and road surface information on the road surface of each road.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to an in-vehicle system, a recommended driving information determination device, a recommended driving information providing system, a recommended driving information acquisition method, a recommended driving information determination method, and a computer program.

Conventionally, there is known a road surface condition determination system that determines the condition of the road surface on which a vehicle travels from vehicle information, which is information on the behavior of the vehicle during traveling (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-75575

Bridgestone, "Development of tire wear condition estimation technology based on" CAIS "concept", [online], [Search on December 19, 2018], Internet <URL: https: //www.bridgestone. co.jp/corporate/news/2014111401.html ＞ Continental, "Tire Information System", [online], [Search December 19, 2018], Internet <URL: https://www.continental-automotive.com/ja-JP/Passenger-Cars/Interior/Comfort -Security / Tire-Information-Systems ＞ Kazuhiko Ando, Tomoaki Kuramochi, "Comparison of accuracy of various measurement methods for measuring IRI (International Roughness Index) of road surface", Civil Engineering Data 56-10 (2014) Kongyang Chen, Mingming Lu, Xiaopeng Fan, Mingming Wei, and Jinwu Wu, "Road Condition Monitoring Using On-board Threeaxis Accelerometer and GPS Sensor", 2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) IR System, "In-vehicle road sensor RoadEye", [online], [Search on December 19, 2018], Internet <URL: https://www.irsystem.com/product/roadeye/>

However, Patent Document 1 does not show an effective utilization method of the discriminated road surface condition. Further, even under the same road surface condition, the performance is different for each vehicle, so that appropriate conditions such as whether or not the vehicle can travel and the speed at the time of traveling differ depending on the vehicle. It is difficult to determine such conditions.

This disclosure has been made in view of such circumstances, and is an in-vehicle system capable of obtaining appropriate recommended information on vehicle driving for each vehicle, a recommended driving information determination device, a recommended driving information providing system, and a recommendation. It is an object of the present invention to provide a driving information acquisition method, a recommended driving information determination method, and a computer program.

In order to achieve the above object, the in-vehicle system according to the embodiment of the present disclosure is an in-vehicle system mounted on a vehicle, and tire information indicating the performance of the tire mounted on the vehicle and the departure of the vehicle. The vehicle information providing unit that provides the departure point information and the destination information indicating the place and the destination to the server, the tire information of the vehicle, the departure place information, and the destination information from the server, respectively. It includes a recommended driving information acquisition unit that acquires recommended driving information that is recommended information about traveling from the departure point to the destination of the vehicle, which is determined based on the road surface information that is information about the road surface of the road.

The recommended driving information determination device according to another embodiment of the present disclosure is a tire information indicating the performance of a tire mounted on the vehicle, and a departure point information and an object indicating the departure point and the destination of the vehicle, respectively. The departure place of the vehicle based on the vehicle information acquisition unit that acquires the ground information, the tire information of the vehicle, the departure place information, the destination information, and the road surface information that is information on the road surface of each road. It includes a recommended driving information determining unit that determines recommended driving information that is recommended information related to traveling from the vehicle to the destination, and a recommended driving information providing unit that provides the determined recommended driving information to the vehicle.

The recommended driving information providing system according to another embodiment of the present disclosure includes an in-vehicle system mounted on a vehicle and a recommended driving information determining device, and the in-vehicle system provides the performance of tires mounted on the vehicle. From the vehicle information providing unit that provides the indicated tire information and the starting point information and the destination information indicating the starting point and the destination of the vehicle to the recommended driving information determining device, and the recommended driving information determining device, the said Recommended information on traveling from the departure point to the destination of the vehicle, which is calculated based on the tire information, the departure point information, the destination information of the vehicle, and the road surface information which is information on the road surface of each road. A vehicle that includes a recommended driving information acquisition unit that acquires certain recommended driving information, and the recommended driving information determining device acquires the tire information, the departure point information, and the destination information of the vehicle from the in-vehicle system. The information acquisition unit, the recommended driving information determination unit that determines the recommended driving information based on the tire information, the departure place information, the destination information, and the road surface information of the vehicle, and the determined recommendation. Includes a recommended driving information providing unit that provides driving information to the in-vehicle system.

The recommended driving information acquisition method according to another embodiment of the present disclosure includes tire information indicating the performance of tires mounted on the vehicle, and departure point information and destination information indicating the departure point and destination of the vehicle, respectively. , The vehicle determined from the server based on the tire information, the departure point information and the destination information of the vehicle, and the road surface information which is information on the road surface of each road. Includes a step of obtaining recommended driving information, which is recommended information regarding driving from the starting point to the destination of the tire.

The recommended driving information determination method according to the other embodiment of the present disclosure is, from the vehicle, tire information indicating the performance of the tire mounted on the vehicle, and departure point information and purpose indicating the departure point and destination of the vehicle, respectively. Based on the step of acquiring the ground information, the tire information of the vehicle, the departure place information, the destination information, and the road surface information which is information on the road surface of each road, the destination from the departure place of the vehicle. It includes a step of determining recommended driving information which is recommended information regarding the driving up to, and a step of providing the determined recommended driving information to the vehicle.

A computer program according to another embodiment of the present disclosure is a computer program for causing a computer to function as an in-vehicle system mounted on a vehicle, wherein the computer is a tire indicating the performance of a tire mounted on the vehicle. The vehicle information providing unit that provides the information and the departure place information and the destination information indicating the departure place and the destination of the vehicle to the server, and the tire information of the vehicle, the departure place information, and the information from the server. Acquisition of recommended driving information for acquiring recommended driving information which is recommended information for traveling from the departure point to the destination of the vehicle, which is determined based on the destination information and the road surface information which is information on the road surface of each road. Make it function as a department.

A computer program according to another embodiment of the present disclosure uses a computer from a vehicle to indicate tire information indicating the performance of tires mounted on the vehicle, and departure information and purpose indicating the departure point and destination of the vehicle, respectively. The departure place of the vehicle based on the vehicle information acquisition unit that acquires the ground information, the tire information of the vehicle, the departure place information, the destination information, and the road surface information that is information on the road surface of each road. The recommended driving information determination unit that determines the recommended driving information, which is the recommended information regarding the driving from the vehicle to the destination, and the determined recommended driving information are made to function as the recommended driving information providing unit that provides the determined vehicle.

The present disclosure can also be realized as a semiconductor integrated circuit that realizes a part or all of an in-vehicle system or a recommended driving information determination device.

According to the present disclosure, it is possible to obtain appropriate recommended information regarding the running of a vehicle for each vehicle.

FIG. 1 is a diagram showing a configuration of a recommended driving information providing system according to an embodiment of the present disclosure. FIG. 2 is a block diagram showing a configuration of an in-vehicle system according to an embodiment of the present disclosure. FIG. 3 is a block diagram showing a server configuration. FIG. 4 is a diagram showing an example of tire information stored in the storage unit. FIG. 5 is a diagram schematically showing an example of map information stored in the storage unit. FIG. 6 is a diagram showing an example of road surface information stored in the storage unit. FIG. 7 is a diagram showing an example of allowable road surface condition information stored in the storage unit. FIG. 8 is a diagram showing an example of recommended traveling route information stored in the storage unit. FIG. 9 is a diagram showing an example of recommended driving information generated by the recommended driving information generation unit. FIG. 10 is a sequence diagram showing a procedure of road surface information creation processing in the recommended driving information providing system. FIG. 11 is a diagram schematically showing an example of map information stored in the storage unit. FIG. 12 is a diagram showing an example of road surface information stored in the storage unit. FIG. 13 is a sequence diagram showing a procedure of vehicle travel support processing in the recommended travel information providing system. FIG. 14 is a diagram showing an example of recommended traveling route information stored in the storage unit.

[Summary of Embodiments of the present disclosure]
First, the outlines of the embodiments of the present disclosure will be listed and described.
(1) The in-vehicle system according to the embodiment of the present disclosure is an in-vehicle system mounted on a vehicle, and includes tire information indicating the performance of the tires mounted on the vehicle and the departure point and destination of the vehicle. The vehicle information providing unit that provides the departure place information and the destination information shown to the server, the tire information of the vehicle, the departure place information and the destination information, and information on the road surface of each road from the server. It is provided with a recommended traveling information acquisition unit for acquiring recommended traveling information which is recommended information regarding traveling from the departure point to the destination of the vehicle, which is determined based on the road surface information.

According to this configuration, the in-vehicle system can acquire recommended driving information determined based on vehicle tire information, starting point information, destination information, and road surface information of each road. For example, the in-vehicle system uses the road surface condition of the route from the starting point to the destination and the tire information of the vehicle to determine the recommended traveling route suitable for driving with the tires equipped on the vehicle and the recommended traveling speed suitable for the road surface condition. Recommended driving information can be obtained. As a result, it is possible to acquire appropriate recommended running information regarding the running of the vehicle for each vehicle.

(2) Preferably, the recommended driving information acquisition unit uses the recommended driving information as the recommended traveling route from the starting point to the destination of the vehicle, the recommended traveling speed in the recommended traveling route, and the road surface shape of the recommended traveling route. , And obtain information indicating at least one of the road surface conditions of the recommended traveling route.

According to this configuration, it is possible to acquire a recommended traveling route, a recommended traveling speed, a road surface shape, or a road surface condition according to the performance of the tires of the vehicle.

(3) More preferably, the recommended driving information acquisition unit periodically acquires the recommended driving information from the server.

According to this configuration, recommended driving information can be acquired on a regular basis. Therefore, even when the road surface condition changes, the latest recommended driving information can be obtained, so that safe vehicle driving can be realized.

(4) Further, the in-vehicle system described above further provides the server with a road surface condition acquisition unit that acquires the road surface condition of the road on which the vehicle travels and road surface condition information indicating the acquired road surface condition. It may be provided with a status information providing unit.

According to this configuration, the server can acquire the road surface condition information from the vehicle traveling on the road, so that the latest road surface condition information can be acquired. Therefore, the server can determine the recommended driving information of another vehicle scheduled to travel on the same road as the road on which the vehicle has traveled based on the latest road surface condition information, and provide the recommended traveling information to the other vehicle. As a result, even when the road surface condition changes, the latest recommended driving information can be provided to other vehicles.

(5) Further, the in-vehicle system described above further provides the server with a road surface shape acquisition unit that acquires the road surface shape of the road on which the vehicle travels, and road surface shape information indicating the acquired road surface shape. It may be provided with a shape information providing unit.

According to this configuration, the server can acquire the road surface shape information from the vehicle traveling on the road, so that the latest road surface shape information can be acquired. Therefore, the server can determine the recommended driving information of another vehicle that is going to travel on the same road as the road on which the vehicle has traveled based on the latest road surface shape information, and can provide the recommended traveling information to the other vehicle. As a result, even when the road surface shape changes, the latest recommended driving information can be provided to other vehicles.

(6) The recommended driving information determination device according to another embodiment of the present disclosure is a tire information indicating the performance of a tire mounted on the vehicle, and a departure point indicating the departure point and the destination of the vehicle, respectively. The vehicle is based on a vehicle information acquisition unit that acquires information and destination information, the tire information of the vehicle, the departure point information and the destination information, and road surface information that is information on the road surface of each road. It is provided with a recommended driving information determination unit that determines recommended driving information, which is recommended information regarding traveling from the departure point to the destination, and a recommended driving information providing unit that provides the determined recommended driving information to the vehicle. ..

According to this configuration, recommended traveling information of the vehicle can be determined and provided to the vehicle based on the tire information, the departure place information and the destination information of the vehicle and the road surface information of each road. For example, from the road surface condition of the route from the departure point to the destination and the tire information of the vehicle, recommended driving information such as a recommended driving route suitable for driving with the tires equipped on the vehicle and a recommended traveling speed suitable for the road surface condition can be obtained. Can be determined and provided to the vehicle. As a result, the vehicle can acquire appropriate recommended running information regarding the running of the vehicle.

(7) Preferably, the recommended driving information determination unit determines the departure of the vehicle as the recommended driving information based on the tire information, the departure place information, the destination information, and the road surface information of the vehicle. At least one of the recommended travel route from the ground to the destination, the recommended travel speed in the recommended travel route, the road surface shape of the recommended travel route, and the road surface condition of the recommended travel route is determined.

According to this configuration, it is possible to provide the vehicle with a recommended travel route, a recommended travel speed, a road surface shape, or a road surface condition according to the performance of the tires of the vehicle.

(8) More preferably, the road surface information includes road surface condition information indicating the condition of the road surface, and the recommended driving information determining unit includes the allowable road surface condition information indicating the road surface condition allowing traveling for each type of tire. , The recommended traveling route is determined based on the tire information, the departure place information, the destination information, and the road surface condition information of the vehicle.

According to this configuration, the recommended traveling route can be determined in consideration of the road surface condition information and the tire information. Thereby, for example, it is possible to determine a recommended traveling route for a vehicle equipped with normal tires to detour without passing through a road whose road surface is frozen. As a result, an appropriate recommended traveling route can be determined for each vehicle.

(9) Further, the road surface information includes road surface shape information indicating the shape of the road surface, and the recommended traveling information determining unit determines the recommended traveling speed in the recommended traveling route based on the road surface shape information. You may.

According to this configuration, the recommended traveling speed can be determined according to the road surface shape. For example, it is possible to determine a lower recommended traveling speed for a vehicle traveling on an uneven road surface. Thereby, an appropriate recommended running speed can be determined for each vehicle.

(10) Further, the tire information indicates at least one of the air pressure and the wear state of the tire mounted on the vehicle, and the recommended running information determining unit is in the recommended running route based on the tire information. The recommended running speed may be determined.

According to this configuration, the recommended running speed can be determined based on any one of the tire pressure and the wear condition. For example, a lower recommended running speed can be determined for a vehicle in which the tire pressure is too high or too low, or in a vehicle in which the tire wear state is large. Thereby, an appropriate recommended running speed can be determined for each vehicle.

(11) Further, the recommended driving information determination unit redetermines the recommended driving information when the road surface information is changed, and the recommended driving information providing unit redetermines the recommended driving information determined again. , May be provided to the vehicle.

According to this configuration, when the road surface information is changed as in the case where the road surface condition is changed, the recommended traveling information can be determined again and provided to the vehicle. Therefore, the vehicle can travel based on the latest recommended travel information.

(12) Further, the recommended driving information determination device described above further includes a road surface information acquisition unit that acquires road surface information of the road surface on which the vehicle travels from the vehicle, and the road surface information acquisition unit acquires the road surface. The information may be used to update the road surface information used for determining the recommended driving information.

According to this configuration, the server can acquire the road surface information from the vehicle, so that the latest road surface information can be acquired. Therefore, the server can determine the recommended driving information based on the latest road surface information and provide it to the vehicle. As a result, even if the road surface information is changed, the latest recommended driving information can be provided to the vehicle.

(13) The recommended driving information providing system according to another embodiment of the present disclosure includes an in-vehicle system mounted on a vehicle and a recommended driving information determining device, and the in-vehicle system includes tires mounted on the vehicle. The vehicle information providing unit that provides the tire information indicating the performance of the vehicle and the starting point information and the destination information indicating the starting point and the destination of the vehicle to the recommended driving information determining device, and the recommended driving information determining device. The vehicle travels from the departure point to the destination, which is calculated based on the tire information, the departure point information, the destination information of the vehicle, and the road surface information which is information on the road surface of each road. The recommended driving information determination device includes a recommended driving information acquisition unit that acquires recommended driving information, which is recommended information, and the recommended driving information determining device obtains the tire information, the departure point information, and the destination information of the vehicle from the in-vehicle system. The vehicle information acquisition unit to be acquired, the recommended driving information determination unit that determines the recommended driving information based on the tire information, the departure place information, the destination information, and the road surface information of the vehicle are determined. The recommended driving information providing unit that provides the recommended driving information to the in-vehicle system is included.

According to this configuration, the recommended driving information determination device determines the recommended driving information of the vehicle based on the tire information, the departure place information and the destination information of the vehicle and the road surface information of each road, and provides the recommended driving information to the in-vehicle system. be able to. For example, the recommended driving information determination device is suitable for a recommended driving route suitable for driving with tires equipped on the vehicle and a road surface condition based on the road surface condition of the route from the departure point of the vehicle to the destination and the tire information of the vehicle. Recommended driving information such as recommended driving speed can be determined and provided to the in-vehicle system. As a result, the in-vehicle system can acquire appropriate recommended driving information regarding the driving of the vehicle.

(14) The recommended driving information acquisition method according to another embodiment of the present disclosure includes tire information indicating the performance of tires mounted on the vehicle, and departure point information and destination indicating the departure point and destination of the vehicle, respectively. The information was determined based on a step of providing the information to the server, the tire information of the vehicle, the departure point information, the destination information, and the road surface information which is information on the road surface of each road from the server. , The step of acquiring the recommended driving information which is the recommended information regarding the traveling from the starting point to the destination of the vehicle.

This configuration includes steps corresponding to the characteristic processing units of the in-vehicle system described above. Therefore, according to this configuration, the same actions and effects as those of the above-mentioned in-vehicle system can be obtained.

(15) In the recommended driving information determination method according to another embodiment of the present disclosure, the tire information indicating the performance of the tires mounted on the vehicle and the departure point indicating the departure point and the destination of the vehicle are shown from the vehicle. The departure place of the vehicle based on the step of acquiring the information and the destination information, the tire information of the vehicle, the departure place information and the destination information, and the road surface information which is information on the road surface of each road. It includes a step of determining recommended driving information which is recommended information regarding traveling from the vehicle to the destination, and a step of providing the determined recommended driving information to the vehicle.

This configuration includes steps corresponding to the characteristic processing units included in the recommended travel information determination device described above. Therefore, according to this configuration, the same actions and effects as those of the above-mentioned recommended driving information determination device can be obtained.

(16) The computer program according to another embodiment of the present disclosure is a computer program for causing a computer to function as an in-vehicle system mounted on a vehicle, and the computer is used as a performance of a tire mounted on the vehicle. The vehicle information providing unit that provides the tire information indicating the above and the departure place information and the destination information indicating the departure place and the destination of the vehicle to the server, and the tire information of the vehicle and the departure from the server. It is recommended to acquire the recommended driving information which is the recommended information about the traveling from the departure point of the vehicle to the destination determined based on the ground information and the destination information, and the road surface information which is the information about the road surface of each road. It functions as a driving information acquisition unit.

According to this configuration, the computer can function as the above-mentioned in-vehicle system. Therefore, the same actions and effects as those of the above-mentioned in-vehicle system can be obtained.

(17) In the computer program according to another embodiment of the present disclosure, the computer is transmitted from the vehicle to the tire information indicating the performance of the tire mounted on the vehicle, and the departure point indicating the departure point and the destination of the vehicle, respectively. The vehicle is based on a vehicle information acquisition unit that acquires information and destination information, the tire information of the vehicle, the departure point information and the destination information, and road surface information that is information on the road surface of each road. The recommended driving information determination unit that determines the recommended driving information, which is the recommended information regarding the driving from the departure point to the destination, and the determined recommended driving information are made to function as the recommended driving information providing unit that provides the vehicle.

According to this configuration, the computer can function as the recommended driving information determination device described above. Therefore, the same actions and effects as those of the above-mentioned recommended driving information determination device can be obtained.

[Details of Embodiments of the present disclosure]
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be noted that all of the embodiments described below show a preferred specific example of the present disclosure. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, the order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present disclosure. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept of the present disclosure will be described as arbitrary components constituting the more preferable form.

[Embodiment 1]
<Overall configuration of recommended driving information provision system>
FIG. 1 is a diagram showing a configuration of a recommended driving information providing system according to an embodiment of the present disclosure.
With reference to FIG. 1, the recommended driving information providing system 1 includes an in-vehicle system 3 mounted on the vehicle 2 and a server 4.

The in-vehicle system 3 is wirelessly connected to the network 5 via the wireless base station 6.
The radio base station 6 is composed of a macro cell base station, a micro cell base station, a pico cell base station, or the like.

The server 4 is connected to a network 5 such as the Internet or a public mobile phone network.

The server 4 is composed of, for example, a general-purpose server capable of SDN (Software-Defined Networking). Further, the relay device such as the radio base station 6 and the repeater (not shown) is a transport device capable of SDN.

The network virtualization technology represented by SDN is the basic concept of the "fifth generation mobile communication system" (hereinafter, abbreviated as "5G" (5th Generation)) whose standardization is currently in progress. Therefore, the recommended driving information providing system 1 is made of, for example, 5G.

The vehicle 2 includes not only ordinary passenger cars but also public vehicles such as fixed-route buses and emergency vehicles. Further, the vehicle 2 may be a two-wheeled vehicle (motorcycle) as well as a four-wheeled vehicle.

The drive system of the vehicle 2 may be an engine drive, an electric motor drive, or a hybrid system. The driving method of the vehicle 2 may be either normal driving in which the passenger performs operations such as acceleration / deceleration and steering wheel steering, or automatic driving in which the software executes the operations.

The in-vehicle system 3 transmits the departure place information and the destination information indicating the departure place and the destination of the vehicle 2 to the server 4. Specifically, the in-vehicle system 3 transmits a route calculation request including departure place information and destination information to the server 4. The route calculation request is information for requesting the calculation of the traveling route from the departure point to the destination of the vehicle 2.

In addition, the in-vehicle system 3 transmits tire information indicating the performance of the tires mounted on the vehicle 2 to the server 4.

The server 4 functions as a recommended driving information determination device, and based on the route calculation request and tire information transmitted from the in-vehicle system 3, recommends driving information which is recommended information regarding driving from the departure point to the destination of the vehicle 2. Generate. The server 4 transmits the generated recommended driving information to the in-vehicle system 3 mounted on the vehicle 2.

The recommended travel information indicates, for example, at least one of a recommended travel route from the starting point to the destination of the vehicle 2, a recommended travel speed in the recommended travel route, a road surface shape of the recommended travel route, and a road surface condition of the recommended travel route.

The in-vehicle system 3 receives recommended driving information from the server 4 and executes driving support processing based on the recommended driving information. A specific example of the driving support process will be described later.

<In-vehicle system configuration>
FIG. 2 is a block diagram showing a configuration of an in-vehicle system 3 according to an embodiment of the present disclosure.

The in-vehicle system 3 includes a travel route calculation requesting unit 31, a tire information collecting unit 32, a vehicle information providing unit 33, a road surface shape detecting unit 34, a road surface condition detecting unit 35, a self-position detecting unit 36, and road surface information. It includes a providing unit 37, a recommended driving information acquisition unit 38, and a vehicle control unit 39.

The travel route calculation request unit 31 creates a route calculation request for requesting the calculation of the travel route from the departure point to the destination of the vehicle 2, and outputs the created route calculation request to the vehicle information providing unit 33. The route calculation request includes departure point information indicating the departure place of the vehicle 2 and destination information indicating the destination. When the user inputs the departure place and the destination using an input device such as an in-vehicle touch panel, the travel route calculation requesting unit 31 acquires the information of the departure place and the destination from the input device. The traveling route calculation requesting unit 31 can also acquire the vehicle position detected by the self-position detecting unit 36, which will be described later, as the starting point of the vehicle 2.

The tire information collecting unit 32 collects tire information indicating the performance of the tire mounted on the vehicle 2. For example, tire information includes a tire type, a tire wear status, a tire air pressure, and a tire manufacturer.

The tire type is information indicating the type of the tire, and is, for example, studless or normal.

The tire wear status shows, for example, the depth of the remaining groove of the tire as a percentage, 0% indicates a tire that is not worn, and 100% indicates a tire that has 0 remaining groove and is completely worn. .. The tire information collecting unit 32 receives, for example, the radial acceleration of the tire from an acceleration sensor provided on the tire, and estimates the tire wear state based on the received acceleration. An example of a method for estimating a tire wear state is described in Non-Patent Document 1.

The tire information collecting unit 32 acquires air pressure from, for example, a sensor attached to the tire and capable of directly measuring the pressure inside the tire. An example of a sensor for measuring air pressure is described in Non-Patent Document 2.
The tire information collecting unit 32 outputs the collected tire information to the vehicle information providing unit 33.

The vehicle information providing unit 33 acquires the route calculation request output by the traveling route calculation requesting unit 31 and the tire information output by the tire information collecting unit 32, and obtains the acquired route calculation request and tire information and the vehicle ID. The vehicle information including the vehicle information is transmitted to the server 4.

Here, the vehicle ID is an identifier of the vehicle 2, and is, for example, a vehicle registration number, a vehicle identification number, or another ID for identifying the vehicle 2.

The road surface shape detecting unit 34 functions as a road surface shape acquiring unit and detects the road surface shape of the road on which the vehicle 2 travels. Specifically, the road surface shape detecting unit 34 detects the IRI (International Roughness Index) and the friction coefficient of the road surface as the road surface shape.

IRI is a kind of index indicating the degree of unevenness of the road surface (see, for example, Non-Patent Document 3). The road surface shape detection unit 34 is composed of, for example, a 3-axis acceleration sensor and a GPS (Global Positioning System) receiver, and estimates the IRI from the power spectral density of the road surface roughness based on the output of these sensors. (See, for example, Non-Patent Document 4). When the self-position detection unit 36, which will be described later, is configured to include a GPS receiver, the road surface shape detection unit 34 acquires the output of the GPS receiver from the self-position detection unit 36 without providing the GPS receiver. It may be configured to be.

Further, the road surface shape detecting unit 34 can be composed of, for example, a sensor that detects the friction coefficient of the road surface by irradiating the road surface with infrared lasers having a plurality of wavelengths and measuring the reflection thereof (for example, non-road surface). See Patent Document 5).
The road surface shape detection unit 34 outputs the detected road surface shape information to the road surface information providing unit 37.

The road surface condition detection unit 35 functions as a road surface condition acquisition unit and detects the road surface condition of the road on which the vehicle 2 travels. Road surface conditions include, for example, dry, wet, ice, snow, sherbet, and condensation. The road surface condition detection unit 35 can be composed of, for example, a sensor that detects the road surface condition by irradiating the road surface with infrared lasers having a plurality of wavelengths and measuring the reflection thereof (see, for example, Non-Patent Document 5). ).
The road surface condition detection unit 35 outputs the detected road surface condition information to the road surface information providing unit 37.

The self-position detection unit 36 receives a signal from a satellite of a satellite positioning system such as GPS, and detects the self-position of the vehicle 2, that is, the vehicle position based on the received signal. The vehicle position is indicated by, for example, latitude and longitude. The self-position detection unit 36 is composed of, for example, a GPS receiver or the like. The self-position detection unit 36 may include LiDAR (Light Detection and Ranging) in addition to the GPS receiver. By using LiDAR, it is possible to detect a position with high accuracy. As a result, not only the road on which the vehicle 2 travels but also the lane can be specified.

The self-position detection unit 36 outputs the detected vehicle position information to the travel route calculation request unit 31, the road surface information providing unit 37, and the vehicle control unit 39.

The road surface information providing unit 37 functions as a road surface shape information providing unit and a road surface condition information providing unit, and the road surface shape information and the road surface condition information are obtained from the road surface shape detecting unit 34, the road surface condition detecting unit 35, and the self-position detecting unit 36, respectively. And acquire vehicle position information. The road surface information providing unit 37 transmits the acquired road surface shape information, road surface condition information, vehicle position information, and road surface shape observation time to the server 4 as road surface information. Instead of the observation time of the road surface shape, the observation time of the road surface condition may be transmitted to the server 4.

The recommended travel information acquisition unit 38 acquires the recommended travel information by receiving the recommended travel information from the departure point to the destination of the vehicle 2 from the server 4. The recommended driving information acquisition unit 38 outputs the acquired recommended driving information to the vehicle control unit 39.

The vehicle control unit 39 acquires the vehicle position information output by the self-position detection unit 36 and the recommended travel information output by the recommended travel information acquisition unit 38. The vehicle control unit 39 executes the travel support process of the vehicle 2 based on the acquired vehicle position information and the recommended travel information.

For example, when the vehicle 2 is an autonomous vehicle, the vehicle control unit 39 controls the traveling of the vehicle 2 based on the recommended traveling information. For example, the vehicle control unit 39 specifies the position of the vehicle 2 based on the vehicle position information, and specifies the recommended traveling speed corresponding to the specified position from the recommended traveling information. The vehicle control unit 39 controls the rotation speed of the motor or engine, and controls the accelerator or brake in order to drive the vehicle 2 at the specified recommended traveling speed.

If the vehicle 2 is not an autonomous vehicle, the vehicle control unit 39 gives a notification based on the recommended driving information. For example, the vehicle control unit 39 displays the above-mentioned recommended traveling speed on the screen of the display device included in the vehicle 2, or displays the recommended traveling route as navigation information on the screen.

The in-vehicle system 3 can also be configured by a computer including a CPU (Central Processing Unit), a memory, a communication interface, an input / output interface, and the like. By executing the computer program stored in the memory on the CPU, each processing unit of the in-vehicle system 3 is functionally realized. However, a part or all of each processing unit may be realized by hardware.

<Configuration of server 4>
FIG. 3 is a block diagram showing the configuration of the server 4.
The server 4 includes a vehicle information acquisition unit 41, a recommended travel route calculation unit 42, a storage unit 43, a road surface information acquisition unit 44, a recommended travel speed calculation unit 45, a recommended travel information generation unit 46, and recommended travel information. A providing unit 47 is provided.

The vehicle information acquisition unit 41 acquires vehicle information by receiving vehicle information from the in-vehicle system 3.

The vehicle information acquisition unit 41 stores the tire information and the vehicle ID in the storage unit 43 as the tire information 11 together with the acquired vehicle information.

FIG. 4 is a diagram showing an example of tire information 11 stored in the storage unit 43.
The tire information 11 includes a vehicle ID, a tire type, a wear status, an air pressure, and a manufacturer. For example, the tire type of the tire mounted on the vehicle 2 with the vehicle ID "1" is "studless", the wear status is "0%", the air pressure is "250 kPa", and the manufacturer is "Company A". is there. In addition, the tire type of the tire installed in the vehicle 2 with the vehicle ID "3" is "normal", the wear status is "20%", the air pressure is "190 kPa", and the manufacturer is "Company B". is there.

The storage unit 43 is composed of a storage device such as a RAM (Random Access Memory) or an HDD (Hard Disk Drive), and stores tire information 11, map information 12, road surface information 13, allowable road surface condition information 14, and recommended travel route information 15. I remember.

FIG. 5 is a diagram schematically showing an example of map information 12 stored in the storage unit 43. The map information 12 includes, for example, position information of each point and position information of a road (link) connecting each point.

For example, in the map information 12 shown in FIG. 5, a point S, a point I, and a point D are schematically shown. Further, in the map information 12, the main line of the road ID “A” (hereinafter referred to as “road A”) and the narrow street of the road ID “B” (hereinafter referred to as “road B”) are described as roads connecting the points S and I. ”) Is shown, indicating that road A is composed of two lanes, lane 1 and lane 2, and road B is composed of two lanes, lane 1 and lane 2. Further, in the map information 12, the main line of the road ID "C" (hereinafter referred to as "road C") and the narrow street of the road ID "D" (hereinafter referred to as "road D") are described as roads connecting the points I and D. ) And a living road with road ID "E" (hereinafter referred to as "road E") are shown. Further, road C, road D, and road E each have one lane. The map information 12 includes position information of positions other than those shown in FIG. 5 and position information of links.

The road surface information acquisition unit 44 acquires the road surface information by receiving the road surface information from the in-vehicle system 3. Further, the road surface information acquisition unit 44 reads the map information 12 from the storage unit 43. The road surface information acquisition unit 44 identifies the road ID and lane of the road on which the vehicle 2 has traveled by performing map matching processing based on the vehicle position indicated by the acquired road surface information and the map information 12. The road surface information acquisition unit 44 stores the road surface information including the result of map matching in the storage unit 43 as the road surface information 13.

FIG. 6 is a diagram showing an example of the road surface information 13 stored in the storage unit 43.
The road surface information 13 includes a road ID, a lane, a position, a road surface shape information, a road surface condition information, and an observation time. The road surface shape information includes the IRI and the coefficient of friction.

For example, the road surface shape information when a certain vehicle 2 travels in the entire lane 1 of the road A has an IRI of "3.5 m / km" and a friction coefficient of "0.8". In addition, the road surface condition information is "dry". Further, the observation time of the road surface shape is "2018/11/30 12:00:00".

Further, the road surface shape information when a certain vehicle 2 travels from the position a1 to the position a2 of the lane 2 of the road A has an IRI of "3.5 m / km" and a friction coefficient of "0.5". In addition, the road surface condition information is "ice". Further, the observation time of the road surface shape is "2018/11/30 12:00:00".

No road surface shape information or road surface condition information has been obtained for the lane 2 of the road B and the lane 1 of the road E.

FIG. 7 is a diagram showing an example of the allowable road surface state information 14 stored in the storage unit 43. The permissible road surface condition information 14 includes the tire type and the permissible road surface condition.

For example, if there is no information regarding the tire type, the road surface conditions that are allowed to run are "dry" and "wet". When the tire type is "studless", the road surface conditions allowed to run are "snow", "ice", "wet", "sherbet", "condensation" and "dry". Further, when the tire type is "normal", the road surface conditions allowed to travel are "dry", "wet" and "condensation".

The vehicle information acquisition unit 41 outputs the route calculation request and the vehicle ID included in the vehicle information to the recommended travel route calculation unit 42.

The recommended travel route calculation unit 42 functions as a recommended travel information determination unit, and acquires a vehicle ID and a route calculation request from the vehicle information acquisition unit 41. Further, the recommended travel route calculation unit 42 reads out tire information 11, map information 12, road surface information 13, and allowable road surface condition information 14 from the storage unit 43. The recommended travel route calculation unit 42 is the departure point of the vehicle 2 indicated by the route calculation request based on the vehicle ID and the route calculation request acquired from the vehicle information acquisition unit 41 and various information 11 to 14 read from the storage unit 43. The recommended travel route from to the destination is calculated for each vehicle 2. The recommended travel route calculation unit 42 stores the calculated recommended travel route information for each vehicle 2 in the storage unit 43.

The calculation process of the recommended travel route by the recommended travel route calculation unit 42 will be described in detail.
For example, the recommended travel route calculation unit 42 has acquired the vehicle ID "1" and the route calculation request for the server 4 from the vehicle information acquisition unit 41 with the point S as the departure point and the point D as the destination. To do. Further, the recommended travel route calculation unit 42 similarly requests from the vehicle information acquisition unit 41 to calculate a route with each of the vehicle IDs "2" to "5" and the point S as the starting point and the point D as the destination. Suppose you get.

From the map information shown in FIG. 5, the recommended travel route calculation unit 42 sets the route from the point S to the point D as “road A → road C”, “road A → road D”, “road A → road E”. , "Road B-> Road C", "Road B-> Road D" and "Road B-> Road E" are calculated.

Further, the recommended travel route calculation unit 42 specifies that the tire type of the vehicle 2 having the vehicle ID “1” is “studless” based on the tire information 11. Based on the permissible road surface condition information 14 and the specified tire type "studless", the recommended travel route calculation unit 42 sets "snow" and "snow" and "snow" as road surface conditions in which the vehicle 2 with the vehicle ID "1" is allowed to travel. Identify "ice," "wet," "sorbet," "condensation," and "dry."

The recommended travel route calculation unit 42 identifies the road on which the vehicle 2 with the vehicle ID "1" can travel, based on the road surface information 13. Vehicle 2 with vehicle ID "1" is allowed to travel on roads with "snow", "ice", "wet", "sherbet", "condensation" and "dry" road surfaces. Therefore, the recommended travel route calculation unit 42 specifies that the vehicle 2 having the vehicle ID "1" can travel on the roads A to D, except for the road E whose road surface condition information has not been measured in all lanes. To do. As a result, the recommended travel route calculation unit 42 excludes "road A-> road E" and "road B-> road E" including the road E from the six travel route candidates. The recommended travel route calculation unit 42 determines “road A → road C”, which has the shortest travel time, as the recommended travel route of the vehicle 2 having the vehicle ID “1” among the four remaining travel routes. The tire type of the vehicle ID "2" is also "studless". Therefore, similarly, the recommended travel route calculation unit 42 also determines that the recommended travel route of the vehicle 2 having the vehicle ID “2” is “road A → road C”.

The recommended travel route calculation unit 42 may also determine a lane as the recommended travel route. For example, on the road A, the road surface condition of the lane 1 is "dry" and the road surface condition of the lane 2 is "ice", so that the lane 1 which can be traveled more safely may be set as the recommended traveling route.

Further, the recommended travel route calculation unit 42 specifies that the tire type of the vehicle 2 having the vehicle ID “3” is “normal” based on the tire information 11. Based on the permissible road surface condition information 14 and the specified tire type "normal", the recommended travel route calculation unit 42 sets the road surface condition of the vehicle 2 having the vehicle ID "3" to be "dry" and "dry". Identify "wet" and "condensation".

The recommended travel route calculation unit 42 identifies the road on which the vehicle 2 with the vehicle ID "3" can travel, based on the road surface information 13. The vehicle 2 having the vehicle ID "3" is allowed to travel on the road under the road surface conditions of "dry", "wet" and "condensation". Therefore, the recommended travel route calculation unit 42 determines that the road A and the road C including the lane of the road surface condition "ice" cannot travel. Further, the recommended travel route calculation unit 42 determines that the road E whose road surface condition information has not been measured in all lanes cannot travel. That is, the recommended travel route calculation unit 42 determines that the road A, the road C, and the road E cannot travel, but the road B and the road D can travel. As a result, the recommended travel route calculation unit 42 selects five travel routes "road A → road C", "road A → road D", and "road A → road D" including road A, road C, or road E from the six travel route candidates. Exclude "Road A-> Road E", "Road B-> Road C", and "Road B-> Road E". As a result, the remaining "road B-> road D" is determined as the recommended travel route of the vehicle 2 having the vehicle ID "3". The tire type of the vehicle 2 having the vehicle IDs "4" and "5" is also "normal". Therefore, similarly, the recommended travel route is determined as “road B → road D”.

The recommended travel route calculation unit 42 may also determine a lane as the recommended travel route. For example, on the road B, the road surface condition of the lane 1 is "dry", and the road surface condition of the lane 2 is "unmeasured". Therefore, the lane 1 which can travel more safely may be set as the recommended traveling route.

The recommended travel route calculation unit 42 stores the recommended travel route calculated for each vehicle ID in the storage unit 43.

FIG. 8 is a diagram showing an example of recommended travel route information 15 stored in the storage unit 43.
The recommended travel route information 15 includes a vehicle ID, a departure place, a destination, a recommended travel route, and a calculated time. Here, the calculated time indicates the time when the recommended traveling route calculation unit 42 calculates the recommended traveling route. For example, the departure point of the vehicle 2 with the vehicle ID "1" is "point S", the destination is "point D", and the recommended travel route calculated by the recommended travel route calculation unit 42 is "road A → road C". The time when the recommended travel route calculation unit 42 calculated the recommended travel route is "2018/11/30 12:05: 00". Further, the departure point of the vehicle 2 of the vehicle ID "3" is "point S", the destination is "point D", and the recommended travel route calculated by the recommended travel route calculation unit 42 is "road B → road D". The time when the recommended travel route calculation unit 42 calculated the recommended travel route is "2018/11/30 12:05: 00".

The recommended running speed calculation unit 45 functions as a recommended running information determination unit, and reads out tire information 11, road surface information 13, and recommended running route information 15 from the storage unit 43. The recommended traveling speed calculation unit 45 calculates the recommended traveling speed when the vehicle 2 travels on the recommended traveling route for each vehicle ID based on the read tire information 11, the road surface information 13, and the recommended traveling route information 15. More specifically, the recommended traveling speed calculation unit 45 specifies the recommended traveling route of the vehicle 2 for each vehicle ID based on the recommended traveling route information 15. Further, the recommended traveling speed calculation unit 45 specifies the road surface shape (IRI and friction coefficient) and the road surface condition of the specified recommended traveling route based on the road surface information 13. Further, the recommended traveling speed calculation unit 45 specifies the wear state and the air pressure of the tires mounted on the vehicle 2 based on the tire information 11. The recommended running speed calculation unit 45 specifies the recommended running speed based on the specified IRI, friction coefficient, road surface condition, wear condition, and air pressure. For example, the recommended running speed calculation unit 45 sets a value obtained by subtracting a specified speed (for example, 20 km / h) from the legal speed as the recommended running speed when any of the following conditions 1 to 5 is satisfied. .. The recommended running speed calculation unit 45 sets the legal speed as the recommended running speed when none of the conditions 1 to 5 is met. It is also possible to use the regulated speed instead of the legal running speed.

(Condition 1) IRI is equal to or higher than the threshold value (for example, 12 m / km) (Condition 2) Friction coefficient is less than the threshold value (for example, 0.5) (Condition 3) Road surface condition is "snow", "ice", "wet", "Sherbet" or "condensation"
(Condition 4) Tire wear status is a threshold (for example, 70% or more)
(Condition 5) Tire pressure is out of the threshold range (for example, less than 200 kPa or greater than 250 kPa).

For example, the vehicle 2 having the vehicle ID "1" does not correspond to the conditions 4 and 5 because the wear coefficient is 0% and the air pressure is 250 kPa. Further, focusing on the recommended travel route “road A → road C” of the vehicle 2 with the vehicle ID “1”, neither the road A nor the road C corresponds to the conditions 1 and 2. The road surface condition between lane 2 of road A and road C is "ice", and lane 1 of road A is "dry". Therefore, the recommended traveling speed calculation unit 45 corresponds to condition 3 when the lane is not specified in the recommended traveling route, and sets the recommended traveling speed of road A and road C to a value obtained by subtracting the specified speed from the legal speed. Set. On the other hand, the recommended traveling speed calculation unit 45 corresponds to the condition 3 when the recommended traveling route is a route traveling in the lane 1 of the road A, and sets only the recommended traveling speed of the road C to a value lower than the legal speed. Set.

The recommended running speed calculation unit 45 outputs the calculated recommended running speed to the recommended running information generation unit 46 in association with the vehicle ID.

The recommended travel information generation unit 46 functions as a recommended travel information determination unit, and acquires a recommended travel speed from the recommended travel speed calculation unit 45. Further, the recommended travel information generation unit 46 reads out the road surface information 13 and the recommended travel route information 15 from the storage unit 43. The recommended travel information generation unit 46 generates recommended travel information for each vehicle ID based on the acquired recommended travel speed, the read road surface information 13, and the recommended travel route information 15.

FIG. 9 is a diagram showing an example of recommended driving information generated by the recommended driving information generation unit 46.
The recommended driving information shown in FIG. 9 is, for example, recommended driving information for vehicle 2 having vehicle ID "1", and includes directions, road IDs, lanes, road surface shape information (IRI and friction coefficient), and road surface. Includes status information and recommended driving speed. The recommended driving information indicates that the vehicle travels in lane 1 of road C after traveling in lane 1 of road A as a route. The IRI of lane 1 of road A is "3.5 m / km", the coefficient of friction is "0.8", the road surface condition is "dry", and the recommended running speed is "50 km / h". is there. The IRI of lane 1 of road C is "7.0 m / km", the coefficient of friction is "0.3", the road surface condition is "ice", and the recommended running speed is "25 km / h". is there.

The recommended driving information generation unit 46 outputs the generated recommended driving information to the recommended driving information providing unit 47.

The recommended driving information providing unit 47 acquires the recommended driving information from the recommended driving information generating unit 46 and transmits it to the in-vehicle system 3. For example, the recommended driving information providing unit 47 transmits the recommended driving information for the vehicle 2 having the vehicle ID “1” shown in FIG. 9 to the vehicle-mounted system 3 mounted on the vehicle 2 of the vehicle “1”.

The server 4 can also be configured by a computer including a CPU, a ROM (Read Only Memory), a RAM, an HDD, a communication interface, an input / output interface, and the like. Each processing unit of the server 4 is functionally realized by executing a computer program stored in a storage device such as an HDD on the CPU. However, a part or all of each processing unit may be realized by hardware.

<About road surface information creation processing>
Hereinafter, the process of creating the road surface information 13 in the recommended driving information providing system 1 will be described.

FIG. 10 is a sequence diagram showing a procedure of road surface information creation processing in the recommended driving information providing system 1.

The road surface shape detection unit 34 of the vehicle-mounted system 3 detects the road surface shape of the road on which the vehicle 2 travels (S1).

The road surface condition detection unit 35 of the in-vehicle system 3 detects the road surface condition of the road on which the vehicle 2 travels (S2).
The self-position detection unit 36 of the in-vehicle system 3 detects the vehicle position (S3).

The road surface information providing unit 37 of the in-vehicle system 3 transmits the road surface information including the road surface shape, the road surface condition, and the self-position information detected in steps S1 to S3 and the observation time of the road surface shape to the server 4. .. The road surface information acquisition unit 44 of the server 4 receives the road surface information (S4).

The road surface information acquisition unit 44 of the server 4 generates road surface information 13 from the received road surface information and the map information 12 stored in the storage unit 43, and stores the generated road surface information 13 in the storage unit 43 (S5). ..

By the above processing, the road surface information 13 as shown in FIG. 6 is stored in the storage unit 43 of the server 4.

The recommended driving information providing system 1 repeatedly executes the road surface information creation process shown in FIG. For example, the in-vehicle system 3 transmits road surface information to the server 4 at a predetermined cycle, and the server 4 updates the road surface information 13 based on the road surface information.

An example of updating the road surface information 13 will be described below. FIG. 11 is a diagram schematically showing an example of map information 12 stored in the storage unit 43. FIG. 12 is a diagram showing an example of road surface information 13 stored in the storage unit 43.

The map information 12 shown in FIG. 11 is the same as the map information 12 shown in FIG. However, for the sake of explanation, the position d1 and the position d2 are shown on the road D.

For example, in the road surface information 13 shown in FIG. 6, the road surface shape information and the road surface condition information were not obtained for the lane 2 of the road B and the lane 1 of the road E, but the vehicle 2 traveling in these lanes thereafter It is assumed that the road surface shape information and the road surface condition information are obtained. In this case, as shown in FIG. 12, the rows of lane 2 of road B and lane 1 of road E of the road surface information 13 are updated.

Further, in the road surface information 13 shown in FIG. 6, the road surface shape information and the road surface condition information are obtained for the lane 1 of the road D, but after that, the other vehicles 2 traveling in this lane move from the position d1 to the position d2. It is assumed that the road surface shape information and the road surface condition information of the section are obtained. In this case, as shown in FIG. 12, the row of lane 1 of the road D of the road surface information 13 is updated. That is, the position "entire area", the friction coefficient "0.75", the road surface condition information "dry", and the observation time "2018/11/30 11:40:00" are the positions "d1 to d2" and the friction coefficient "0". .4 ”, road surface condition information“ ice ”, and observation time“ 2018/11/30 12:15: 00 ”are updated respectively.

<About the driving support processing of vehicle 2>
Hereinafter, the process of supporting the running of the vehicle 2 in the recommended running information providing system 1 will be described.

FIG. 13 is a sequence diagram showing a procedure for traveling support processing of the vehicle 2 in the recommended traveling information providing system 1.

The tire information collecting unit 32 of the vehicle-mounted system 3 collects tire information of the tires mounted on the vehicle 2 (S11).

The travel route calculation request unit 31 of the in-vehicle system 3 acquires the destination of the vehicle 2 input by the user from an input means (not shown) (S12).
The self-position detection unit 36 of the in-vehicle system 3 detects the vehicle position (S13).

The travel route calculation request unit 31 of the in-vehicle system 3 uses the vehicle position detected in step S13 as the current location of the vehicle 2 to generate a route calculation request from the current location to the destination acquired in step S12 (S14).

The vehicle information providing unit 33 of the vehicle-mounted system 3 transmits the vehicle information including the route calculation request generated in step S14, the tire information collected in step S11, and the vehicle ID of the vehicle 2 to the server 4. The vehicle information acquisition unit 41 of the server 4 receives the vehicle information from the in-vehicle system 3 (S15).

The vehicle information acquisition unit 41 of the server 4 stores the tire information and the vehicle ID included in the vehicle information received in step S15 in the storage unit 43 as the tire information 11 (S16). As a result, the tire information 11 as shown in FIG. 4 is stored in the storage unit 43.

The recommended travel route calculation unit 42 of the server 4 reads out tire information 11, map information 12, road surface information 13, and allowable road surface condition information 14 from the storage unit 43. The recommended travel route calculation unit 42 of the vehicle 2 is based on the route calculation request included in the vehicle information received in step S15, the read tire information 11, the map information 12, the road surface information 13, and the allowable road surface condition information 14. Calculate the recommended travel route. The recommended travel route calculation unit 42 stores the recommended travel route information 15 indicating the calculated recommended travel route in the storage unit 43 (S17). As a result, the recommended travel route information 15 as shown in FIG. 8 is stored in the storage unit 43.

The recommended traveling speed calculation unit 45 of the server 4 reads out the tire information 11, the road surface information 13, and the recommended traveling route information 15 from the storage unit 43. The recommended traveling speed calculation unit 45 calculates the recommended traveling speed when the vehicle 2 travels on the recommended traveling route based on the read tire information 11, the road surface information 13, and the recommended traveling route information 15 (S18).

The recommended travel information generation unit 46 of the server 4 reads the road surface information 13 and the recommended travel route information 15 from the storage unit 43. The recommended travel information generation unit 46 generates recommended travel information for the vehicle 2 based on the recommended travel speed calculated in step S18, the read road surface information 13 and the recommended travel route information 15 (S19).

The recommended driving information providing unit 47 of the server 4 transmits the recommended driving information generated in step S19 to the in-vehicle system 3. The recommended driving information acquisition unit 38 of the in-vehicle system 3 receives the recommended driving information from the server 4 (S20). As a result, the recommended driving information as shown in FIG. 9 is transmitted from the server 4 to the in-vehicle system 3.

The vehicle control unit 39 of the vehicle-mounted system 3 executes the travel support process of the vehicle 2 based on the recommended travel information received by the recommended travel information acquisition unit 38 and the vehicle position detected by the self-position detection unit 36 (S21). .. For example, the vehicle control unit 39 controls the vehicle 2 so as to travel in the order of lane 1 on road A and lane 1 on road C based on the recommended travel information shown in FIG. Further, the vehicle control unit 39 has a traveling speed of 50 km / h or less when the vehicle 2 is traveling on the road A, and a traveling speed of 25 km / h or less when the vehicle 2 is traveling on the road B. The vehicle 2 is controlled so as to be.

The recommended driving information providing system 1 repeatedly executes the traveling support process of the vehicle 2 shown in FIG. 13 until the vehicle 2 reaches the destination. For example, the in-vehicle system 3 transmits vehicle information to the server 4 at a predetermined cycle (for example, every 5 minutes), and the server 4 periodically (for example, every 3 minutes) generates recommended driving information based on the vehicle information. And transmit it to the in-vehicle system 3. The in-vehicle system 3 periodically receives the recommended travel information and executes the travel support process of the vehicle 2 based on the recommended travel information.

For example, when the road surface information 13 is updated from the one shown in FIG. 6 to the one shown in FIG. 12, the road surface condition of the road D is changed from "dry" to "ice". Therefore, the vehicle 2 equipped with the normal tires that could travel on the road D when the road surface condition is "dry" cannot travel on the road D because the road surface condition is changed to "ice". Therefore, the travel route calculated by the recommended travel route calculation unit 42 changes in step S17, and the recommended travel route information 15 stored in the storage unit 43 is updated.

FIG. 14 is a diagram showing an example of recommended travel route information 15 stored in the storage unit 43.

The recommended travel route information 15 shown in FIG. 14 indicates a recommended travel route generated when the road surface condition of the road D is “ice”. Compared with the recommended driving route information 15 when the road surface condition of the road D shown in FIG. 8 is “dry”, the route of the vehicle 2 having the vehicle IDs “3” to “5” equipped with the normal tire is “road B →”. It has been updated from "Road D" to "Road B → Road E". This is because, as described above, the vehicle 2 equipped with the normal tires cannot travel on the road D whose road surface condition is "ice".

<Effect of Embodiment 1>
As described above, the server 4 determines the recommended driving information of the vehicle 2 based on the tire information, the departure place information, and the destination information of the vehicle 2 and the road surface information of each road, and provides the recommended driving information to the in-vehicle system 3. can do. For example, the server 4 is suitable for a recommended travel route suitable for traveling by the tires equipped on the vehicle 2 and a road surface condition based on the road surface condition of the route from the departure point to the destination of the vehicle 2 and the tire information of the vehicle 2. Recommended running information such as the recommended running speed can be determined and provided to the in-vehicle system 3. As a result, the in-vehicle system 3 can acquire appropriate recommended running information regarding the running of the vehicle 2.

Further, the in-vehicle system 3 can acquire the recommended traveling route, the recommended traveling speed, the road surface shape, or the road surface condition according to the performance of the tires of the vehicle 2 as the recommended traveling information.

In addition, the in-vehicle system 3 can periodically acquire recommended driving information. Therefore, even when the road surface condition changes, the latest recommended driving information can be obtained, so that safe vehicle driving can be realized.

Further, since the server 4 can acquire the road surface condition information from the vehicle 2 traveling on the road, the latest road surface condition information can be acquired. Therefore, the server 4 can determine the recommended traveling information of another vehicle that is scheduled to travel on the same road as the road on which the vehicle 2 has traveled based on the latest road surface condition information, and can provide the recommended traveling information to the other vehicle. As a result, even when the road surface condition changes, the latest recommended driving information can be provided to other vehicles.

Further, since the server 4 can acquire the road surface shape information from the vehicle 2 traveling on the road, the latest road surface shape information can be acquired. Therefore, the server 4 can determine the recommended traveling information of another vehicle that is scheduled to travel on the same road as the road on which the vehicle 2 has traveled based on the latest road surface shape information, and can provide the recommended traveling information to the other vehicle. As a result, even when the road surface shape changes, the latest recommended driving information can be provided to other vehicles.

Further, the server 4 can determine the recommended traveling route in consideration of the road surface condition information and the tire information. Thereby, for example, for the vehicle 2 equipped with normal tires, it is possible to determine a recommended traveling route to detour without passing through a road whose road surface is frozen. As a result, an appropriate recommended traveling route can be determined for each vehicle 2.

Further, the server 4 can determine the recommended traveling speed according to the road surface shape. For example, it is possible to determine a lower recommended traveling speed for the vehicle 2 traveling on a road surface having severe irregularities. Thereby, an appropriate recommended running speed can be determined for each vehicle 2.

Further, the server 4 can determine the recommended running speed based on any one of the tire pressure and the wear state. For example, for a vehicle 2 in which the tire pressure is too high or too low, or for a vehicle 2 in which the tire wear state is large, a lower recommended running speed can be determined. Thereby, an appropriate recommended running speed can be determined for each vehicle 2.

[Modification example]
In the above-described embodiment, the recommended driving information providing system 1 repeatedly executes the traveling support process of the vehicle 2 shown in FIG. 13 until the vehicle 2 reaches the destination. As a result, the server 4 periodically transmits the recommended driving information to the in-vehicle system 3, the in-vehicle system 3 periodically receives the recommended driving information from the server 4, and executes the driving support processing of the vehicle 2 based on the recommended driving information. can do.

On the other hand, when the road surface information 13 stored in the storage unit 43 is updated, the recommended travel route calculation unit 42 of the server 4 recalculates the recommended travel route, and the recommended travel speed calculation unit 45 recalculates the recommended travel speed. May be recalculated. As a result, when the road surface information 13 is updated, the recommended driving information generation unit 46 can generate the recommended driving information, and the recommended driving information providing unit 47 can provide the recommended driving information to the in-vehicle system 3. Therefore, the amount of data communication between the in-vehicle system 3 and the server 4 can be reduced, and the vehicle 2 can travel based on the latest recommended travel information.

[Additional Notes]
Although the recommended driving information providing system 1 according to the embodiment of the present disclosure has been described above, the present disclosure is not limited to this embodiment.

For example, the above-mentioned computer program may be recorded and distributed on a computer-readable non-temporary recording medium such as an HDD, a CD-ROM, or a semiconductor memory. Further, the computer program may be transmitted and distributed via a telecommunication line, a wireless or wired communication line, a network typified by the Internet, data broadcasting, or the like.
Further, the in-vehicle system 3 or the server 4 may be realized by a plurality of computers.

Further, some or all the functions of the in-vehicle system 3 or the server 4 may be provided by cloud computing. That is, a part or all of the functions of the in-vehicle system 3 or the server 4 may be realized by the cloud server. For example, in the server 4, the function of the recommended travel route calculation unit 42 may be realized by the cloud server, and the cloud server may have map information. The server 4 has a configuration in which a route calculation request and tire information, road surface information, and allowable road surface condition information stored in the storage unit 43 are transmitted to the cloud server, and a recommended travel route is acquired from the cloud server. You may.

Further, at least a part of the above-described embodiment and the above-described modification may be arbitrarily combined.

18
It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present disclosure is shown by the scope of claims, not the above meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Recommended driving information providing system 2 Vehicle 3 In-vehicle system 4 Server 5 Network 6 Radio base station 11 Tire information 12 Map information 13 Road surface information 14 Allowable road surface condition information 15 Recommended driving route information 31 Driving route calculation request unit 32 Tire information collecting unit 33 Vehicle information providing unit 34 Road surface shape detecting unit 35 Road surface condition detecting unit 36 Self-position detecting unit 37 Road surface information providing unit 38 Recommended driving information acquisition unit 39 Vehicle control unit 41 Vehicle information acquisition unit 42 Recommended driving route calculation unit 43 Storage unit 44 Road surface Information acquisition unit 45 Recommended driving speed calculation unit 46 Recommended driving information generation unit 47 Recommended driving information providing unit

Claims (17)

An in-vehicle system installed in a vehicle
A vehicle information providing unit that provides a server with tire information indicating the performance of tires mounted on the vehicle, and starting point information and destination information indicating the starting point and destination of the vehicle, respectively.
From the departure point to the destination of the vehicle, which is determined from the server based on the tire information, the departure place information, the destination information of the vehicle, and the road surface information which is information on the road surface of each road. An in-vehicle system including a recommended driving information acquisition unit that acquires recommended driving information, which is recommended information related to driving. As the recommended driving information, the recommended driving information acquisition unit includes a recommended traveling route from the starting point of the vehicle to the destination, a recommended traveling speed in the recommended traveling route, a road surface shape of the recommended traveling route, and the recommended traveling route. The vehicle-mounted system according to claim 1, wherein the information indicating at least one of the road surface conditions of the vehicle is acquired. The in-vehicle system according to claim 1 or 2, wherein the recommended driving information acquisition unit periodically acquires the recommended driving information from the server. further,
A road surface condition acquisition unit that acquires the road surface condition of the road on which the vehicle travels,
The vehicle-mounted system according to any one of claims 1 to 3, further comprising a road surface condition information providing unit that provides the acquired road surface condition information indicating the road surface condition to the server. further,
A road surface shape acquisition unit that acquires the road surface shape of the road on which the vehicle travels,
The vehicle-mounted system according to any one of claims 1 to 4, further comprising a road surface shape information providing unit that provides the acquired road surface shape information indicating the road surface shape to the server. A vehicle information acquisition unit that acquires tire information indicating the performance of the tires mounted on the vehicle and departure point information and destination information indicating the departure point and destination of the vehicle, respectively, from the vehicle.
Recommended information regarding traveling from the departure point to the destination of the vehicle based on the tire information, the departure place information, the destination information of the vehicle, and the road surface information which is information on the road surface of each road. The recommended driving information determination unit that determines driving information,
A recommended driving information determining device including a recommended driving information providing unit that provides the determined recommended driving information to the vehicle. Based on the tire information, the departure place information, the destination information, and the road surface information of the vehicle, the recommended driving information determination unit provides the recommended driving information from the departure place to the destination of the vehicle. The recommended traveling information determining device according to claim 6, wherein at least one of a recommended traveling route, a recommended traveling speed in the recommended traveling route, a road surface shape of the recommended traveling route, and a road surface condition of the recommended traveling route is determined. The road surface information includes road surface condition information indicating the condition of the road surface.
The recommended driving information determination unit includes allowable road surface condition information indicating a road surface condition that allows traveling for each type of tire, tire information of the vehicle, departure point information, destination information, and road surface condition information. The recommended driving information determination device according to claim 7, wherein the recommended traveling route is determined based on the above. The road surface information includes road surface shape information indicating the shape of the road surface.
The recommended traveling information determining device according to claim 7 or 8, wherein the recommended traveling information determining unit determines the recommended traveling speed in the recommended traveling route based on the road surface shape information. The tire information indicates at least one of the tire pressure and wear conditions of the tire mounted on the vehicle.
The recommended traveling information determining device according to any one of claims 7 to 9, wherein the recommended traveling information determining unit determines the recommended traveling speed in the recommended traveling route based on the tire information. When the road surface information is changed, the recommended driving information determination unit determines the recommended driving information again.
The recommended driving information determining device according to any one of claims 6 to 10, wherein the recommended traveling information providing unit provides the recommended traveling information determined again to the vehicle. further,
A road surface information acquisition unit for acquiring road surface information of the road surface on which the vehicle has traveled is provided from the vehicle.
The recommended driving information determining device according to any one of claims 6 to 11, wherein the road surface information acquisition unit updates the road surface information used for determining the recommended traveling information based on the acquired road surface information. In-vehicle system mounted on the vehicle and
Equipped with a recommended driving information determination device
The in-vehicle system is
A vehicle information providing unit that provides tire information indicating the performance of tires mounted on the vehicle, departure point information and destination information indicating the departure point and destination of the vehicle, respectively, to the recommended driving information determination device. ,
From the departure place of the vehicle calculated from the recommended driving information determining device based on the tire information of the vehicle, the departure place information and the destination information, and the road surface information which is information on the road surface of each road. Including the recommended driving information acquisition unit that acquires recommended driving information, which is recommended information on driving to the destination,
The recommended driving information determination device is
A vehicle information acquisition unit that acquires the tire information, the departure place information, and the destination information of the vehicle from the in-vehicle system.
A recommended driving information determination unit that determines the recommended driving information based on the tire information, the departure place information, the destination information, and the road surface information of the vehicle.
A recommended driving information providing system including a recommended driving information providing unit that provides the determined recommended driving information to the in-vehicle system. A step of providing the server with tire information indicating the performance of the tires mounted on the vehicle, and departure point information and destination information indicating the departure point and destination of the vehicle, respectively.
From the departure point to the destination of the vehicle, which is determined from the server based on the tire information of the vehicle, the departure point information, the destination information, and the road surface information which is information on the road surface of each road. A recommended driving information acquisition method including a step of acquiring recommended driving information which is recommended information about driving. A step of acquiring tire information indicating the performance of a tire mounted on the vehicle and departure point information and destination information indicating the departure point and destination of the vehicle, respectively, from the vehicle.
Recommended information regarding traveling from the departure point to the destination of the vehicle based on the tire information, the departure place information, the destination information of the vehicle, and the road surface information which is information on the road surface of each road. Steps to determine driving information and
A method for determining recommended driving information, which includes a step of providing the determined recommended driving information to the vehicle. A computer program that allows a computer to function as an in-vehicle system mounted on a vehicle.
The computer
A vehicle information providing unit that provides a server with tire information indicating the performance of tires mounted on the vehicle, and starting point information and destination information indicating the starting point and destination of the vehicle, respectively.
From the departure point to the destination of the vehicle, which is determined from the server based on the tire information, the departure point information, the destination information of the vehicle, and the road surface information which is information on the road surface of each road. A computer program that functions as a recommended driving information acquisition unit that acquires recommended driving information, which is recommended information related to driving. Computer,
A vehicle information acquisition unit that acquires tire information indicating the performance of the tires mounted on the vehicle and departure point information and destination information indicating the departure point and destination of the vehicle, respectively, from the vehicle.
Recommended information regarding traveling from the departure point to the destination of the vehicle based on the tire information, the departure place information, the destination information of the vehicle, and the road surface information which is information on the road surface of each road. The recommended driving information determination unit that determines driving information,
A computer program for causing the determined recommended driving information to function as a recommended driving information providing unit provided to the vehicle.

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