WO2012157018A1

WO2012157018A1 - Mobile navigation device and mobile navigation system

Info

Publication number: WO2012157018A1
Application number: PCT/JP2011/002704
Authority: WO
Inventors: 威郎坂入; 隆史玉田; 康志小高; 功泰西馬
Original assignee: 三菱電機株式会社
Priority date: 2011-05-16
Filing date: 2011-05-16
Publication date: 2012-11-22

Abstract

Provided is a mobile navigation device provided with: a communication device (7), communication interface unit (9) and passage ease processing unit (14) which constitute a communication section that receives an assessment value regarding the ease of passage of a route, from a passage ease assessment unit (19) that assesses the ease of passage of routes on the basis of probe information; and a navigation processing unit (5) which provides route guidance for a vehicle (2) to a destination by means of a route the assessment value for which received by the communication section is equal to or greater than a predetermined value.

Description

Mobile navigation device and mobile navigation system

The present invention relates to a mobile navigation device that presents a route evaluated for ease of passage of a mobile body and a mobile navigation system using the mobile navigation device.

For example, in Patent Document 1, unspecified number of probe information is classified for each preference item that can be a cause of route selection, and user attribute information (vehicle type, vehicle type, and the like) is obtained from a preference parameter that is a road link usage frequency for each preference item. The preference parameter of the preference item similar to age, gender, driving purpose, passenger, etc.) and adjusting the cost so that the cost of the road link is reduced according to the similarity to the preference parameter of this selection result Analogize the route that suits your taste.

Japanese Patent No. 4554653

The invention of Patent Document 1 is intended to present a route that is close to the driver's preference, and discloses a process for evaluating the ease of passage of a vehicle (passability) considering the convenience of the driver. Absent. For this reason, the subject that the traffic ease of the vehicle which does not depend on a driver's preference cannot be evaluated for every road occurred.

In the invention of Patent Document 1, since it is premised that the preference parameter is used for searching for a recommended route, it cannot be used when the route search is not performed. Furthermore, in order to select a preference parameter to be used for searching for a recommended route, attribute information such as vehicle type, age, gender, driving purpose, and passengers is essential, and a troublesome setting operation for inputting this is required. Furthermore, if the probe information collected by other vehicles is not sufficiently accumulated, a preference parameter similar to the user attribute information cannot be obtained.

The present invention has been made to solve the above-described problems, and provides a mobile navigation device and a mobile navigation system capable of presenting route information evaluated for ease of passage of a mobile object. With the goal.

The mobile navigation apparatus according to the present invention receives an evaluation value of route accessibility from an evaluation unit that evaluates route accessibility based on probe information including the type, movement state, and route state of the mobile body. A communication unit; and a navigation processing unit that guides the moving body to a destination along a route in which an evaluation value received by the communication unit is equal to or greater than a predetermined value.

According to the present invention, there is an effect that it is possible to present route information evaluated for ease of passage of a moving object.

It is a figure which shows the structure of the mobile navigation system which concerns on Embodiment 1 of this invention. It is a figure which shows the registration content of probe DB. 4 is a flowchart showing a route search process in consideration of the ease of passage of a vehicle by the mobile navigation system according to the first embodiment. It is a flowchart which shows the calculation process of the passability evaluation value by a passability evaluation part. It is a figure which shows an example of a trafficability parameter which consists of a large vehicle ratio and the weighting coefficient for evaluation value calculation of trafficability. It is a figure which shows an example of the accessibility parameter which consists of the speed ratio in a highway, and the weighting coefficient for calculating the evaluation value of accessibility. It is a figure which shows an example of the traffic ease parameter which consists of the weight ratio for the speed ratio in a general road, and the evaluation value calculation of traffic ease. It is a figure which shows the example of a display of the evaluation result of the ease of passage at the time of route guidance. 4 is a flowchart showing a process for evaluating the ease of passage of a vehicle by the mobile navigation system according to the first embodiment. It is a figure which shows the example of a display of the evaluation result of the ease of passage at the time of driving | running | working which does not carry out route guidance. It is a figure which shows another structure of the probe server apparatus of the mobile navigation system which concerns on Embodiment 1. FIG.

Hereinafter, in order to describe the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
1 is a diagram showing a configuration of a mobile navigation system according to Embodiment 1 of the present invention. 1, the mobile navigation system according to Embodiment 1 includes a mobile navigation device 1 and a probe server device 3 mounted on a mobile body (for example, a vehicle 2). The mobile navigation device 1 is a navigation device mounted on a vehicle 2 and capable of communicating with a probe server device 3 via a communication network 4, and includes a navigation processing unit 5, a GPS (Global Positioning System) receiver 6, A communication device 7, a display device 8, and an input unit 8a are provided.

In the above configuration, the GPS receiver 6 is a receiver that receives GPS radio waves for specifying the vehicle position from GPS satellites, and the communication device 7 is a device that communicates with the probe server device 3 via the communication network 4. It is. For example, it corresponds to a communication processing module built in the mobile navigation device 1 or a mobile phone connected to the mobile navigation device 1.
The display device 8 is a display monitor device that displays information obtained by processing by the navigation processing unit 5 on the screen. For example, various menu screen displays, map display by the map display unit 13, and ease-of-passage processing unit 14 are displayed. The result of the evaluation of the ease of passing by is displayed.
The input unit 8a is a component that receives a destination setting input and various operations by the user, and is realized by a touch panel mounted on the screen of the display device 8, for example.

The navigation processing unit 5 is a component that performs navigation processing such as route search, route guidance, and map display, and includes a communication interface unit 9, a position information acquisition unit 10, a map database (DB) 11, a route search unit 12, and a map display unit. 13, a passability processing unit 14, a probe information processing unit 15, and a passability setting storage unit 16.
The communication interface unit 9 is an interface that performs communication control for the communication device 7 and relays communication between the probe server device 3 and the navigation processing unit 5 via the communication network 4.

The location information acquisition unit 10 is a configuration unit that acquires location information (latitude and longitude) of the vehicle from the analysis result of GPS radio waves received by the GPS receiver 6. The position information of the own vehicle is transmitted from the position information acquisition unit 10 to the navigation processing unit 5. Further, in addition to the analysis result of the GPS radio wave, the position information may be specified using sensor information by a vehicle speed sensor, an acceleration sensor, and an angular velocity sensor.

The map DB 11 is a database in which map data used for navigation processing is registered. Map data includes topographic map data, house map data, road networks, and the like. The route search unit 12 searches for a recommended route using the destination set using the input unit 8a, the position information of the host vehicle acquired by the position information acquisition unit 10, and the map data registered in the map DB 11. And a component that performs route guidance of the recommended route. The map display unit 13 is a component that displays a map on the screen of the display device 8 using the map data of the map DB 11.

The ease-of-passage processing unit 14 is a component that exchanges information related to the evaluation process of ease of passage (passability) with the probe server device 3. For example, an evaluation request including the passability parameter read from the passability setting storage unit 16 is made to the probe server device 3, and the passability evaluation result evaluated with respect to the passability parameter is used. Receive.

The probe information processing unit 15 is a component that performs processing using probe information detected by a sensor mounted on the host vehicle. For example, the probe information processing unit 15 uploads the probe information of the own vehicle to the probe server device 3 via the communication device 7. In addition, the probe information processing unit 15 reads the passability parameter of the host vehicle from the passability setting storage unit 16 and sends it to the passability processing unit 14.

The communication ease setting storage unit 16 is a storage unit for storing a passability parameter used for evaluation of the passability. The accessibility parameter is information in which a weighting factor (evaluation weighting factor) for calculating the evaluation value of ease of passage is set for each evaluation item of the ease of passage of the vehicle. Note that the weighting coefficient for calculating the evaluation value may be a value set by the user or a value set in advance in the mobile navigation apparatus 1.

The probe server device 3 is a server device that collects and manages probe information, and includes a probe database (DB) 17, a probe DB access unit 18, a passability evaluation unit 19, a probe information acquisition unit 20, and terminal information processing. Unit 21, information return unit 22, and communication interface unit 23. The probe DB 17 is a database in which probe information detected by an unspecified number of vehicles is registered. The probe information is information indicating the vehicle state and road environment detected in the traveling vehicle, and includes vehicle type, position information (latitude and longitude), time, vehicle speed, road surface condition of the traveling road, and the like.

The probe DB access unit 18 is a component that accesses the probe DB 17 and exchanges probe information. For example, the probe DB access unit 18 registers the probe information acquired by the probe information acquisition unit 20 and is requested by the passability evaluation unit 19. Information is read from the probe DB 17. In addition, the probe DB access unit 18 converts the probe information acquired by the probe information acquisition unit 20 into the required time for each road link, the average vehicle speed, and the travel frequency (travel ratio) for each vehicle type, and registers them in the probe DB 17. To do.

The passability evaluation unit 19 discriminates an evaluation item corresponding to a predetermined road of the passability parameter of the mobile navigation device 1 from the road condition indicated by the probe information registered in the probe DB 17, and the discriminated evaluation item This is a component that evaluates the ease of passage of the vehicle 2 on which the mobile navigation device 1 is mounted on the predetermined road using the weighting factor (evaluation weighting factor) for calculating the evaluation value of ease of passage set in . The predetermined road includes, for example, a route candidate road searched by the mobile navigation device 1 or a road around the current position of the vehicle 2.
The probe information acquisition unit 20 acquires probe information of an unspecified number of vehicles (probe cars) transmitted via the communication network 4 via the communication interface unit 23 and outputs the probe information to the probe DB access unit 18. It is a component.

The terminal information processing unit 21 extracts information related to the evaluation request for ease of travel from the mobile navigation device 1 from the information received via the communication interface unit 23 and outputs the information to the ease of travel evaluation unit 19. It is the component which performs. The information return unit 22 is configured to return the route information, which has been evaluated by the passability evaluation unit 19, of the passability of the evaluation requesting vehicle to the evaluation requesting mobile navigation device 1 via the communication interface unit 23. Part. The communication interface unit 23 is an interface that relays communication between the probe server device 3 and an external device (for example, the mobile navigation device 1) via the communication network 4.

FIG. 2 is a diagram showing registration contents of the probe DB. As shown in FIG. 2, in the probe DB 17, the probe information is registered in association with the road link on which the vehicle has traveled. That is, the probe DB access unit 18 converts the probe information uploaded to the probe server device 3 into vehicle type information, average vehicle speed, and road surface state for each road link, and registers them in the probe DB 17.
The number of large vehicles, the number of ordinary vehicles, and the number of motorcycles are information converted using the vehicle type information included in the probe information. For example, this corresponds to information obtained by sorting and totaling the number of vehicles that have traveled within a period of a predetermined time back from the current time on the corresponding road link.
The average vehicle speed is information that is converted using the vehicle speed included in the probe information. For example, this corresponds to the average vehicle speed (km / h) of a vehicle that has traveled on a corresponding road link within a period of a predetermined time after the current time.
Furthermore, the road surface state (dry, frozen, etc.) included in the probe information is, for example, a road surface state detected by a vehicle that has traveled a corresponding road link within a period of a predetermined time after the current time. The registered content of the probe DB 17 is updated every time probe information is acquired by the probe information acquisition unit 20.

Next, the operation will be described.
(1) In the case of route guidance FIG. 3 is a flowchart showing a route search process in consideration of the ease of passage of a vehicle by the mobile navigation system according to the first embodiment.
First, in the mobile navigation device 1, the position information acquisition unit 10 acquires position information (latitude and longitude) of the own vehicle (vehicle 2) from the analysis result of the GPS radio wave received by the GPS receiver 6 (step ST1). ). The position information acquired by the position information acquisition unit 10 is sent to the route search unit 12. Next, the user sets a destination in the route search unit 12 using the input unit 8a (step ST2).
The route search unit 12 executes a search for a recommended route using the destination set using the input unit 8a, the position information of the vehicle 2 acquired by the position information acquisition unit 10, and the map data of the map DB 11 ( Step ST3). Here, when the departure place is specified by the position information acquired by the position information acquisition unit 10, a plurality of route candidates connecting the departure place and the destination are calculated. These route candidates are output from the route search unit 12 to the passability processing unit 14.

When the route ease processing unit 14 inputs a route candidate from the route search unit 12, the route information processing unit 14 instructs the probe information processing unit 15 to acquire a route ease parameter. When the probe information processing unit 15 receives the above instruction from the passability processing unit 14, the probe information processing unit 15 reads the passability parameter of the vehicle 2 from the passability setting storage unit 16 and outputs it to the passability processing unit 14.
Thereafter, the passage ease processing unit 14 uses the list of road link IDs indicating the connection of the routes input from the route search unit 12 via the communication device 7 and the communication interface unit 9 as a route candidate, and the probe information processing unit 15. Is transmitted to the probe server device 3 together with the evaluation request including the passability parameter acquired by (step ST4).

In the probe server device 3, the terminal information processing unit 21 extracts information related to the evaluation request for the ease of travel of the mobile navigation device 1 from the information received via the communication interface unit 23 to evaluate the ease of travel. To the unit 19. Here, the route candidate searched by the vehicle 2 and the accessibility parameter of the vehicle 2 are extracted as information related to the evaluation request for the ease of passage of the vehicle 2.
Next, the passability evaluation unit 19 determines an evaluation item corresponding to the link ID of the route candidate from the probe information registered in the probe DB 17 and calculates an evaluation value of the passability set in the determined evaluation item. Is used to calculate the evaluation value of the ease of passage of the vehicle 2 for the route candidate (step ST5). Thereafter, the easiness evaluation unit 19 determines the route candidate having the highest evaluation value from the evaluation values of the easiness of passage for the route candidate, and determines the recommended route in consideration of the easiness of passage of the vehicle 2 ( Step ST6).

Thereafter, the easiness evaluation unit 19 outputs information indicating the recommended route in consideration of easiness of passage of the vehicle 2 to the information return unit 22 together with the evaluation result of the easiness of passage of the vehicle 2 on other route candidates. . The information return unit 22 evaluates the road link list information indicating the recommended route in consideration of the ease of passage of the vehicle 2 and the evaluation result of the ease of passage of the vehicle 2 on other route candidates via the communication interface unit 23. It returns to the requesting mobile navigation device 1 (step ST7).

In the mobile navigation device 1, the passability processing unit 14, through the communication device 7 and the communication interface unit 9, lists road link list information indicating recommended routes taking into account the passability of the vehicle 2, and other routes The evaluation result of the ease of passage of the vehicle 2 as a candidate is received, and these pieces of information are returned to the route search unit 12 and the map display unit 13, respectively.
The route search unit 12 identifies a road link corresponding to the road link ID of the recommended route considering the ease of passage of the vehicle 2 from the road links stored in the map DB 11, and displays the recommended route. The information is displayed on the map screen of the device 8 (step ST8). Moreover, the map display part 13 specifies the road link corresponding to the ID of the road link of another route candidate from the road links stored in the map DB 11, and the ease of passage of the vehicle 2 on the other route candidate. Are displayed on the map screen of the display device 8.

If a plurality of route candidates are determined as route candidates having the highest evaluation value in step ST6, they are returned to the mobile navigation device 1, and the route search unit 12 uses the search mode (shortest) set in itself. The recommended route is a route candidate that matches the distance, the shortest time, paid or free, etc. For example, when the shortest distance mode is set, among the route candidates whose evaluation value is equal to or greater than a predetermined threshold, the route with the shortest route length is determined as the recommended route.

Note that in step ST6, a route candidate having an evaluation value equal to or greater than a predetermined threshold value is determined from the evaluation values of the ease of passage of the route candidates, and the recommended route may be used in consideration of the ease of passage of the vehicle 2. For example, as a predetermined threshold value for each evaluation item (for each accessibility parameter), a lower-limit evaluation value for determining that it is easy to pass for each evaluation item is set in advance in the accessibility evaluation unit 19.
In addition, when evaluating the ease of passage by combining a plurality of evaluation items, for example, for determining a recommended candidate considering the ease of passage of the vehicle 2 using a value obtained by multiplying threshold values corresponding to the items to be evaluated as threshold values. Use.
Further, when a plurality of route candidates are determined as route candidates whose evaluation value is equal to or greater than a predetermined threshold, they are returned to the mobile navigation device 1 as described above, and the route search unit 12 is set to itself. A route candidate that matches the search mode is a recommended route.
For example, when the shortest distance mode is set, among the route candidates whose evaluation value is equal to or greater than a predetermined threshold, the route with the shortest route length is determined as the recommended route. By doing in this way, it is possible to route the vehicle 2 to the destination so that the evaluation value of the ease of travel is not less than a predetermined threshold value.

FIG. 4 is a flowchart showing the calculation process of the passability evaluation value by the passability evaluation unit, and corresponds to the details of the process of step ST5 of FIG.
The passability evaluation unit 19 acquires a road link to be evaluated for passability by using an ID that uniquely identifies the road link as a key (step ST1a). The road link to be evaluated for ease of passage is, for example, a road link of a route candidate obtained by a route search by the mobile navigation device 1 that is the requester of the evaluation, or a vehicle 2 on which the mobile navigation device 1 is mounted. It is a road link around the position of (own vehicle).

Next, the passability evaluation part 19 acquires the passability parameter used as the object of passability evaluation of the vehicle 2 (step ST2a).
Subsequently, the passability evaluation unit 19 instructs the probe DB access unit 18 to read and acquire the probe information corresponding to the road link acquired in step ST1a from the probe DB 17 (step ST3a).

The passability evaluation unit 19 discriminates evaluation items corresponding to route candidates (or roads around the vehicle 2) from the probe information acquired in step ST3a, and evaluates the passability set for the discriminated evaluation items. Using the value calculation weight coefficient (evaluation weight coefficient), an evaluation value of ease of passage of the vehicle 2 with respect to the route candidate (or a road around the vehicle 2) is calculated (step ST4a).

5 to 7 are diagrams showing examples of the trafficability parameters. FIG. 5 is an example of a traffic ease parameter composed of a ratio of large vehicles and a weighting factor for calculating an evaluation value of ease of travel. FIG. 6 shows speed ratios (average vehicle speed ratio) and ease of travel on a highway. An example of a trafficability parameter including a weighting factor for evaluation value calculation is shown. FIG. 7 shows an example of a trafficability parameter composed of a speed ratio (average vehicle speed ratio) on a general road and a weighting factor for calculating an evaluation value of ease of travel.
In FIGS. 5 to 7, the ratio of large vehicles and the ratio of speed are evaluation items for ease of travel. The ratio of large vehicles is a value obtained by normalizing the number of large vehicles that have traveled on the road link to be evaluated within a predetermined period by the number of all vehicles that have traveled on the road link during the same period. The speed ratio is an average vehicle speed of a vehicle that has traveled on the road link to be evaluated within a predetermined period.

The large vehicle ratio and the speed ratio are divided into predetermined ratios, and a weighting coefficient for calculating an evaluation value for ease of passage is set for each section. The weighting coefficient for each category of evaluation items is a value determined for each vehicle.
For example, if the host vehicle is a light vehicle, the driver may feel a traffic danger when the distance between the host vehicle and the host vehicle is shortened. I want to avoid running. The same applies to roads with many vehicles traveling at high speed. In such a case, if the weighting factor for calculating the evaluation value for ease of passage becomes larger as the proportion of large vehicles or the proportion of speed decreases, the ease of passage on the road will depend on the host vehicle. Can be evaluated.

In FIG. 5, the value of the weighting factor for calculating the evaluation value of ease of passage is 1.0 which is the largest in the range where the proportion of large vehicles is 20% or less, and the weighting factor increases as the proportion of large vehicles increases. The value is set to be small, and the weight coefficient value is 0.4 which is the smallest in the range of 60% or more where the ratio of large vehicles is the highest. In the example of FIG. 6, the value of the weighting factor for calculating the evaluation value of ease of travel is 1.0, which is the lowest in the range of 90 (km / h) or less, and the speed ratio is high. Accordingly, the value is set so that the weighting factor decreases, and the value of the weighting factor is 0.4, which is the smallest in the range of 130 (km / h) or higher where the speed ratio is the highest. The same applies to FIG.
In addition, the passability parameter is stored in the passability setting storage unit 16 and may be set by the driver according to his / her preference or may be set in advance for each vehicle.

When evaluating the ease of passage for a single passability parameter, that is, for one evaluation item, the value of the weighting factor of each section of the evaluation item becomes the evaluation value.
On the other hand, when evaluating ease of travel by combining a plurality of ease of travel parameters, a value obtained by multiplying the weighting factors of the corresponding sections of the evaluation items of each parameter is an evaluation value. For example, in the road link 1 in the probe information shown in FIG. 2, the ratio of large vehicles is 22% (calculated from the number of vehicles for each vehicle type shown in FIG. 2) and the weighting factor is 0.8 (see FIG. 5). Since the vehicle speed is 58 (km / h) (see FIG. 2) and the weighting factor is 0.8 (see FIG. 7), the evaluation value of the ease of passage of the vehicle 2 on the road link 1 is 0.8 × 0. 8 = 0.64.
The road link 3 has a large vehicle ratio of 35% (calculated from the number of vehicles for each vehicle type shown in FIG. 2), a weighting factor of 0.7 (see FIG. 5), and an average vehicle speed of 62 (km / h) ( Since the weight coefficient is 0.6 (see FIG. 7), the evaluation value of the ease of passage of the vehicle 2 on the road link 3 is 0.7 × 0.6 = 0.42.
In this case, since the road link 1 has a higher evaluation value of ease of passage, it is determined that the ease of passage is higher.

FIG. 8 is a diagram illustrating a display example of the evaluation result of ease of passage at the time of route guidance. In the example of FIG. 8, a recommended route 25 in consideration of the ease of passage of the vehicle 2 is displayed on the map screen 8 A of the display device 8. In addition, as an evaluation result of the ease of passage of the vehicle 2 on other route candidates, an icon image 26 indicating that there are many high-speed vehicles and an icon image 27 indicating that there are many large vehicles are displayed together. . The passability processing unit 14 associates image information representing the evaluation contents according to the evaluation result of the passability of the vehicle 2 with the road link using the road link ID as a key, and instructs the map display unit 13 to display the image. Information is superimposed on the road of the road link on the map screen 8A.
The image information includes

icon images

26 and 27. That is, image information is set in advance in the passability processing unit 14 in accordance with the contents of the evaluation items of the passability parameter.
For example, the icon image 26 is set using the road link ID of a road link with a large vehicle ratio of 50% or more in FIG. 5 as a key, and the speed link (highway) in FIG. 6 is 130 (km / h) or more. The icon image 27 is set with the road link ID of a road link having a speed ratio (general road) of 80 (km / h) or more in FIG. 7 as a key.

In the example of FIG. 8, the case where the

icon images

26 and 27 are displayed as the evaluation results of the ease of passage of the vehicle 2 on other route candidates is shown, but as will be described later with reference to FIGS. Image information such as

icon images

26 and 27 may be displayed from the evaluation result of the ease of passage on the road around the host vehicle position 2A.

Further, the display form of the route to be guided (recommended route 25) may be changed according to the contents of the evaluation items of the accessibility parameter and the evaluation value. For example, the route color, line width, line type, and the like are changed according to the evaluation value. Further, the display form of other route candidates may be changed in accordance with the evaluation value. In this case, for a route whose evaluation value is less than the lower threshold for ease of passage, a road may be displayed with a warning color (for example, red).

Furthermore, voice guidance may be performed in conjunction with the display of image information. For example, when the input unit 8a is a touch panel, by touching the

icon images

26 and 27 on the map screen, “the road has a lot of high-speed vehicles” or “the road has a lot of large vehicles”. Is output.

(2) When the route navigation is not performed In the mobile navigation system according to the present invention, the results of evaluating the ease of passage of the road around the position of the vehicle 2 on which the mobile navigation device 1 is mounted even when the route navigation is not performed. Can be presented.
FIG. 9 is a flowchart showing a process for evaluating the ease of passage of the vehicle by the mobile navigation system according to the first embodiment.
First, in the mobile navigation device 1, the position information acquisition unit 10 acquires the position information (latitude and longitude) of the vehicle (vehicle 2) from the analysis result of the GPS radio wave received by the GPS receiver 6 (step ST1b). ). The position information acquired by the position information acquisition unit 10 is sent to the passability processing unit 14.

When the position information of the host vehicle is input from the position information acquisition unit 10, the passage ease processing unit 14 instructs the probe information processing unit 15 to acquire the passage ease parameter. When the probe information processing unit 15 receives the above instruction from the passability processing unit 14, the probe information processing unit 15 reads the passability parameter of the vehicle 2 from the passability setting storage unit 16 and outputs it to the passability processing unit 14. Thereafter, the passage ease processing unit 14 uses the communication information 7 and the communication interface unit 9 to input the vehicle position inputted from the position information obtaining unit 10 and the passage ease parameter obtained by the probe information processing unit 15. It transmits to the probe server apparatus 3 with the evaluation request | requirement containing (step ST2b).

In the probe server device 3, the terminal information processing unit 21 extracts information related to the evaluation request for the ease of travel of the mobile navigation device 1 from the information received via the communication interface unit 23 to evaluate the ease of travel. To the unit 19. Here, the position information and the accessibility parameter of the vehicle 2 are extracted as information relating to the evaluation request for the accessibility of the vehicle 2.

Next, the passability evaluation unit 19 determines the vehicle status of each road included within a predetermined range around the vehicle position from the probe information of the probe DB 17 based on the evaluation item of the passability parameter, The evaluation value of the ease of passage of the vehicle 2 on each road is calculated using the weighting coefficient for calculating the evaluation value of the evaluation item corresponding to the vehicle status (step ST3b).
The predetermined range around the vehicle position may be, for example, a circular area within a predetermined distance centered on the vehicle position, or a road section within a predetermined distance that can travel from the vehicle position. Further, the predetermined range may be changed according to the scale of the map displayed on the display device 8. In this case, by transmitting the evaluation request including the scale of the map, the probe server device 3 evaluates the ease of passage of the road included in the predetermined range corresponding to the map scale.

Thereafter, the easiness evaluation unit 19 outputs the evaluation result of easiness of passage on the road included in a predetermined range around the vehicle position to the information return unit 22. In the information return unit 22, the evaluation result of the ease of passage on the road included in the predetermined range around the own vehicle position (the list of road link ID indicating the connection of the road and the evaluation result of the road) is sent to the communication interface unit. It returns to the mobile navigation device 1 that is the evaluation request source via step 23 (step ST4b).

In the mobile navigation device 1, the ease-of-passage processing unit 14 receives the evaluation result of the ease of passage on a road included in a predetermined range around the vehicle position via the communication device 7 and the communication interface unit 9. Reply to the map display unit 13.
The map display unit 13 specifies the road link corresponding to the road link ID of the road included in the predetermined range around the own vehicle position from the road links stored in the map DB 11, and the evaluation result of the accessibility Is displayed on the map screen of the display device 8 (step ST5b).

FIG. 10 is a diagram showing a display example of the evaluation result of the ease of travel when traveling without route guidance. In the example of FIG. 10,

icon images

26 and 27 are displayed on the map screen 8 A of the display device 8 as evaluation results of the ease of passage on roads included in a predetermined range around the vehicle position 2 A. As described above, in the mobile navigation device 1 according to the first embodiment, even during normal travel without route guidance, the probe server device 3 indicates the ease of passage of the host vehicle on a road included in a predetermined range around the host vehicle position 2A. And the result can be presented to the user.

Moreover, you may change the display form of a path | route according to the content of the evaluation item of a passability parameter, and its evaluation value. For example, the route color, line width, line type, and the like are changed according to the evaluation value.
Furthermore, you may change the display form of the area | region containing the path | route classified according to the evaluation value. For example, when the color of an area is changed according to the evaluation value, or when the area is distinguished by a boundary line, the line width, line type, or the like of the boundary line is changed according to the evaluation value.

(3) Route Guidance that Dynamically Updates Recommended Routes Further, the mobile navigation device 1 according to Embodiment 1 evaluates ease of passage including the position of the vehicle that is traveling in a predetermined cycle during route guidance. By making a request to the probe server device 3 and re-searching the route using the evaluation result of the ease of passage on the road around the vehicle position returned in response to the evaluation request, the recommended route is dynamically determined. You may make it update.

First, in the mobile navigation device 1, a route considering the ease of passage of the vehicle 2 is specified by the processing shown in (1) above, and route guidance is started on this recommended route.
Thereafter, the ease-of-passage processing unit 14 requests the probe server device 3 to evaluate the ease of passage including the position of the traveling vehicle at a predetermined cycle (predetermined distance or time).
The probe server device 3 evaluates the ease of passage on the road within a predetermined range around the position of the vehicle 2 by the processing shown in (2) above, and sends the evaluation result to the mobile navigation device 1 that is the requester of the evaluation. Return it.

Based on the evaluation result received from the probe server device 3, the passability processing unit 14 of the mobile navigation device 1 that is the requester of the evaluation requests the current position of the vehicle among roads within a predetermined range around the position of the vehicle 2. The list information of the road link ID indicating the road whose evaluation value is equal to or smaller than a predetermined threshold when the route to the destination is obtained is extracted. The extraction result is sent from the passability processing unit 14 to the route search unit 12.
The route search unit 12 re-searches the route from the current vehicle position to the destination using the list information of the road link ID indicating the road extracted by the passability processing unit 14.
Even if the road environment changes after the recommended route is set by the processing of (1) above, the mobile navigation device 1 re-searches and updates the route as described above, so that the evaluation value of ease of travel is obtained. The vehicle 2 is routed to the destination so as to be below a predetermined threshold.

(4) About the accessibility parameter In the above description, the accessibility parameter with the large vehicle ratio and the average speed ratio as evaluation items was shown. However, the weather (rain, snow, wind, fog) and road surface conditions ( Vehicle information such as the outside environment such as dry, wet state, and freezing), travel distance (travel distance in a predetermined period of another vehicle), etc. may be used as the trafficability parameter.
For example, in the road surface condition accessibility parameter, a weight coefficient for ease of traffic evaluation is set with “dry”, “wet condition”, and “freezing” as evaluation item categories. If the vehicle does not correspond to a frozen road surface, the value of the weight coefficient of the category “freezing” is decreased.
When the passability evaluation unit 19 receives the evaluation request including the roadability parameter of the road surface condition, the evaluation request source uses the probe information uploaded from an unspecified number of other vehicles and the roadability parameter of the road surface condition. A route candidate searched for the vehicle or a road around the position of the vehicle is evaluated for accessibility. The mobile navigation apparatus 1 to which the evaluation result is returned presents this to the user.
Thereby, it can drive | work avoiding the road where the road surface was frozen.

Similarly, in the passability parameter of the travel distance ratio of another vehicle for a predetermined period (one day, etc.), the evaluation items are classified by a predetermined distance range, and a weighting factor is set to the travel number ratio in each distance range. . When it is desired to travel while avoiding a road on which a large number of vehicles having a daily travel distance of a predetermined distance range or more travel, the value of the weighting factor for that section is reduced.
When the passability evaluation unit 19 receives the evaluation request including the passability parameter of the daily travel distance ratio of the other vehicle, the probe information uploaded from an unspecified number of other vehicles and the daily travel of the other vehicle Using the distance ratio trafficability parameter, the ease of traffic related to the daily travel distance ratio of other vehicles is evaluated for the route candidate searched for in the evaluation requesting vehicle or the road around the position of the vehicle. The mobile navigation apparatus 1 to which the evaluation result is returned presents this to the user. Thereby, it can drive | work avoiding the road where many vehicles whose daily driving distance is more than the predetermined distance range drive.
In this case, you may evaluate together with the ease parameter of a vehicle type. For example, when it is desired to avoid a road on which a large number of large vehicles having a daily travel distance of a predetermined value or more travel, a traffic ease parameter of a daily travel distance ratio of other vehicles and a traffic ease parameter of a large vehicle proportion Is used to calculate an evaluation value that combines the two evaluation items.

(5) Passability Evaluation Value Correction Process In the process of (1) above, the passability evaluation unit 19 uses a predetermined threshold value set in advance for each evaluation item, so that the passability of the route candidate is easy. A case is shown in which a route candidate having an evaluation value equal to or greater than a predetermined threshold value is determined from the evaluation values, and a recommended route is considered in consideration of the ease of passage of the vehicle 2.
Here, a configuration will be described in which the evaluation value of ease of travel is corrected by changing the threshold value of the evaluation item according to the user's preference.
FIG. 11 is a block diagram showing another configuration of the probe server device of the mobile navigation system according to the first embodiment. In FIG. 11, the probe server device 3A includes a probe database (DB) 17, a probe DB access unit 18, a passage ease evaluation unit 19A, a probe information acquisition unit 20, a terminal information processing unit 21, an information return unit 22, and a communication interface unit. 23. Here, as a configuration different from that of FIG. 1, the ease of travel evaluation unit 19 A includes a correction unit 24 that corrects the evaluation value of ease of travel.

In the mobile navigation device 1, the user designates a value according to his / her preference with respect to the threshold value of the evaluation item using the input unit 8a. The passability processing unit 14 transmits a correction instruction including a threshold designated by the user to the probe server device 3 A together with the evaluation request including the passability parameter via the communication device 7 and the communication interface unit 9.
The terminal information processing unit 21 of the probe server device 3A includes information related to an evaluation request for ease of passage of the mobile navigation device 1 and evaluation items specified by the user from the information received via the communication interface unit 23. The threshold value is extracted and output to the ease-of-passage evaluation unit 19A.

The passability evaluation unit 19A determines the vehicle situation corresponding to the link ID of the route candidate from the probe information of the probe DB 17 based on the evaluation item of the passability parameter, and evaluates the evaluation item corresponding to the discriminated vehicle situation. An evaluation value of the ease of passage of the vehicle 2 on the route candidate is calculated using a weight coefficient for value calculation.
Subsequently, the correcting unit 24 changes the threshold value of the evaluation item preset in the accessibility evaluation unit 19A to the threshold value of the evaluation item specified by the user, and the route candidate calculated by the accessibility evaluation unit 19A The route candidates whose evaluation value is equal to or greater than the threshold value designated by the user are determined from the evaluation values of the ease of passage in the vehicle, and are determined as recommended routes considering the ease of passage of the vehicle 2.
For example, if the driver is accustomed to high-speed driving, the threshold of the average speed ratio as shown in FIG. 6 or 7 is set lower than the default value. As a result, a road with more high-speed vehicles is determined as a recommended route.

As described above, according to the first embodiment, the communication unit receives the evaluation value of the route ease from the route ease evaluation unit 19 that evaluates the route ease based on the probe information. The communication device 7, the communication interface unit 9, and the ease-of-passage processing unit 14, and the navigation processing unit 5 that guides the vehicle 2 to the destination by a route in which the evaluation value received by the communication unit is a predetermined value or more. By comprising in this way, the guidance route in which the ease of passage of the vehicle 2 was evaluated can be shown. For example, it is often difficult for a driver to pass on a road on which a large number of large cars and high-speed cars are traveling. In this case, the easiness of passing through a road on which a large vehicle or a high-speed vehicle travels is evaluated based on probe information collected from an unspecified number of vehicles, and a route is guided to a destination according to the evaluation result. Thus, the driver can travel without stress while selecting a road with few large cars or high-speed cars.

Moreover, according to this Embodiment 1, since the navigation processing part 5 changes the display form of the display apparatus 8 according to the evaluation value received by the communication part, a driver | operator recognizes the ease of passage of a road. While driving. For example, by displaying a color change or an icon image according to the evaluation value of ease of travel, it is expected that the driver can visually recognize ease of travel and lead to highly convenient driving. In addition, the driver's attention can be alerted by displaying a road with low accessibility (a road with low convenience) in red indicating a warning color.

Further, according to the first embodiment, since the navigation processing unit 5 changes the display mode of the guidance route based on the evaluation value received by the communication unit, it is easy for the user to pass the route being guided. This is expected to lead to more convenient driving.

Furthermore, according to the first embodiment, the communication device 7 is a communication unit that receives an evaluation value of the route accessibility from the trafficability evaluation unit 19 that evaluates the route accessibility based on the probe information. The communication interface unit 9 and the trafficability processing unit 14, and the navigation processing unit 5 that changes the display form of the display device 8 based on the evaluation value received by the communication unit. By comprising in this way, the map display by which the ease of passage of the vehicle 2 was evaluated is realizable. Thereby, the driver can drive while grasping ease of passage.

Furthermore, according to the first embodiment, even when the navigation processing unit 5 does not guide the route, the display form of the display device 8 is changed based on the evaluation value received by the communication unit. In this way, by displaying the ease of traffic on the surrounding roads even when the route is not being guided, the driver can visually recognize the ease of traffic and can be expected to lead to highly convenient driving.

Furthermore, according to the first embodiment, the navigation processing unit 5 changes the display form of the area on the screen or the road based on the evaluation value received by the communication unit. By doing in this way, the driver | operator can visually recognize the area on a map and the ease of traffic of a road, and it is anticipated that it will lead to a more convenient driving | operation. In addition, the driver's attention can be alerted by displaying an area or road with low trafficability in red indicating a warning color.

Furthermore, according to the first embodiment, the mobile navigation system receives the probe information and evaluates the ease of passage of the route based on the probe information, and the ease of travel evaluation unit 19. A probe server device 3 having an information return unit 22 for sending an evaluation value of the ease of passage of the route, and the mobile navigation device 1 for receiving a evaluation value sent from the information return unit 22 by the communication unit. Therefore, it is possible to present a guidance route that is evaluated for ease of passage of the vehicle 2 on which the mobile navigation device 1 is mounted.

Furthermore, according to the first embodiment, the passability evaluation unit 19 discriminates an evaluation item corresponding to the route based on the probe information, and uses the passability evaluation weight coefficient set in the evaluation item. Therefore, the evaluation value of the ease of passage of the route is calculated, and the evaluation result of the ease of passage is more in line with the substance, leading to the improvement of convenient traffic.

Further, according to the first embodiment, the ease-of-passage evaluation unit 19 sets at least one of the vehicle speed information, the vehicle type, the route weather information, and the travel distance of the vehicle in a predetermined period included in the probe information. Based on this, an evaluation value of the route accessibility is calculated. In this way, it is possible to evaluate the ease of passage according to the vehicle speed information, the vehicle type, the route weather information, and the travel distance of the vehicle over a predetermined period.

Furthermore, according to the first embodiment, when the passability evaluation unit 19 discriminates a plurality of evaluation items corresponding to the route based on the probe information, the evaluation weighting factors respectively set for the plurality of evaluation items are obtained. Use to calculate the evaluation value of route accessibility. By doing in this way, the ease of passage according to a plurality of evaluation items can be evaluated comprehensively.

Furthermore, according to the first embodiment, since the correction unit 24 that corrects the evaluation value of the route accessibility calculated by the accessibility evaluation unit 19A according to the designation from the outside is provided, the user can easily pass. Since the sex evaluation value can be corrected as appropriate, an evaluation value suitable for the user's preference can be used. For example, a driver who does not feel stress even when the speed of another vehicle is high can include a road on which a high-speed vehicle travels as a travel target by increasing an evaluation value related to the vehicle speed.

Further, in the first embodiment, the passage ease parameter is stored in the passage ease setting storage unit 16 of the mobile navigation device 1, and the passage is performed when the probe server device 3 is requested to evaluate the passage ease. Although the case where the evaluation request including the ease parameter is performed has been shown, the present invention is not limited to this. For example, the passability parameters for various evaluation items are provided in the passability evaluation unit 19 of the probe server device 3, and the passability parameters are discriminated in the passability setting storage unit 16 of the mobile navigation device 1. Only discriminating information is set. When the mobile navigation device 1 makes an evaluation request including the discrimination information to the probe server device 3, it is possible to similarly evaluate the ease of passage.

In the first embodiment, the case where the mobile navigation device 1 according to the present invention is applied to a vehicle-mounted navigation device has been described. However, not only the vehicle-mounted device but also a mobile phone terminal or a personal digital assistant (PDA). (Assistance) may be applied.
Further, the present invention may be applied to a PND (Portable Navigation Device) or the like that is carried and used by a person such as a vehicle, a railway, a ship, or an aircraft.

In the present invention, any component of the embodiment can be modified or any component of the embodiment can be omitted within the scope of the invention.

The mobile navigation device according to the present invention is suitable for a vehicle-mounted navigation device because it can present route information that evaluates the ease of passage of the mobile device.

1 mobile navigation device, 2 vehicle, 3 probe server device, 4 communication network, 5 navigation processing unit, 6 GPS receiver, 7 communication device, 8 display device, 8a input unit, 9 communication interface unit, 10 location information acquisition unit , 11 Map database (DB), 12 Route search unit, 13 Map display unit, 14 Accessibility processing unit, 15 Probe information processing unit, 16 Accessability setting storage unit, 17 Probe database (DB), 18 Probe DB access Part, 19 accessibility evaluation part, 20 probe information acquisition part, 21 terminal information processing part, 22 information return part, 23 communication interface part, 24 correction part.

Claims

A communication unit that receives an evaluation value of the ease of passage of the route from an evaluation unit that evaluates the ease of passage of the route based on probe information including the type of mobile object, the movement state, and the route state;
A mobile navigation apparatus comprising: a navigation processing unit that guides a mobile unit to a destination along a route in which an evaluation value received by the communication unit is equal to or greater than a predetermined value.
The mobile navigation device according to claim 1, wherein the navigation processing unit changes a display form of the display device based on the evaluation value received by the communication unit.
The mobile navigation device according to claim 2, wherein the navigation processing unit changes a display form of the guidance route based on the evaluation value received by the communication unit.
A communication unit that receives an evaluation value of the ease of passage of the route from an evaluation unit that evaluates the ease of passage of the route based on probe information including the type of mobile object, the movement state, and the route state;
A mobile navigation device comprising: a navigation processing unit that changes a display form of the display device based on the evaluation value received by the communication unit.
The mobile navigation device according to claim 4, wherein the navigation processing unit changes the display form of the display device based on the evaluation value received by the communication unit even when the route is not guided.
The mobile navigation device according to claim 4, wherein the navigation processing unit changes the display form of the area on the screen or the road based on the evaluation value received by the communication unit.
Receives probe information including the type of mobile object, movement state, and route state, and sends an evaluation unit that evaluates route accessibility based on the probe information, and an evaluation value of route accessibility by the evaluation unit A server device having a sending unit to perform,
A mobile navigation system comprising the mobile navigation device according to any one of claims 1 to 6, wherein the communication unit receives an evaluation value transmitted from the transmission unit.
The evaluation unit discriminates an evaluation item corresponding to the route based on the probe information, and calculates an evaluation value of the route accessibility using the evaluation weighting factor of the accessibility set in the evaluation item. The mobile navigation system according to claim 7.
The evaluation unit facilitates passage of the route based on at least one of the velocity information of the moving object, the type of the moving object, the weather information of the route, and the moving distance of the moving object in a predetermined period included in the probe information. The mobile navigation system according to claim 7, wherein a sex evaluation value is calculated.
When the evaluation unit discriminates a plurality of evaluation items corresponding to the route based on the probe information, the evaluation unit calculates an evaluation value of the ease of passage of the route using an evaluation weighting factor set for each of the plurality of evaluation items. The mobile navigation system according to claim 8, wherein:
8. The mobile navigation system according to claim 7, further comprising a correction unit that corrects an evaluation value of route accessibility by the evaluation unit in accordance with designation from the outside.