JP2018059781A - Route guidance device, route guidance method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To advise an appropriate route to the direction of travel at an annular intersection.SOLUTION: Provided is a route guidance device for advising a user's traveling direction at an annular intersection, comprising: first calculation means for calculating the first angle θ of an entry link for the user to enter the annual intersection with a first straight line linking an exit point that indicates a point where the user exits the annual intersection and the center of the annual intersection; second calculation means for calculating a second angle θ1 and a third angle θ2 for correcting the first angle θ; correction means for calculating a fourth angle φ derived by correcting the first angle θ calculated by the first calculation means with the second angle θ1 and third angle θ2 calculated by the second calculation means; and guidance means for advising the user of a traveling direction that corresponds to the fourth angle φ calculated by the correction means.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a route guidance device, a route guidance method, and a program.

  Conventionally, a route guidance device such as a navigation device mounted on a vehicle or the like is known. In the route guidance device, by searching for a route based on a destination or the like input by the user, the route guidance to the destination can be performed using the searched route. In such a route guidance device, for example, by displaying guidance information for guiding a traveling direction (left turn, right turn, straight ahead, etc.) at an intersection or the like, route guidance to a destination is performed.

  In addition, a route guidance device that can perform route guidance at a roundabout (a roundabout is also referred to as “roundabout”) is known (see, for example, Patent Document 1).

JP 2003-269979 A

  However, in the above-described conventional technology, there is a case where route guidance in an appropriate traveling direction cannot be performed at a roundabout. For example, at a roundabout, where guidance information indicating that the vehicle is going to travel straight ahead is displayed, guidance information indicating that the vehicle is traveling leftward is displayed, and guidance information in the wrong traveling direction is displayed. was there. This is because, for example, when there are two roads (that is, a road represented by two links by dividing the upper and lower lines), an error may occur in the calculation of the traveling direction. Because.

  The embodiment of the present invention has been made in view of the above points, and aims to provide route guidance in an appropriate traveling direction at a roundabout.

  In order to achieve the above object, an embodiment of the present invention is a route guidance device for guiding a user's traveling direction at a roundabout, wherein the user enters an entrance link for entering the roundabout, and the user A first calculating means for calculating a first angle θ between a first straight line connecting an escape point indicating a point to escape from the roundabout and the center of the roundabout, and a road connected to the roundabout A second calculating means for calculating a second angle θ1 and a third angle θ2 for correcting the first angle θ, and the first calculating means based on the link indicating the first angle θ. The first angle θ is calculated by the correction unit that calculates the fourth angle φ corrected by the second angle θ1 and the third angle θ2 calculated by the second calculation unit, and is calculated by the correction unit. Corresponds to the fourth angle φ The traveling direction that has a guide means for guiding the user.

  According to the embodiment of the present invention, route guidance in an appropriate traveling direction can be performed at a roundabout.

It is a figure which shows the structure of an example of the route guidance apparatus which concerns on this embodiment. It is a figure explaining an example of the guidance information of a roundabout. It is a figure which shows the hardware constitutions of an example of the route guidance apparatus which concerns on this embodiment. It is a figure which shows the function structure of an example of the route guidance apparatus which concerns on this embodiment. It is a figure which shows an example of the path | route which passes a roundabout. It is a flowchart which shows an example of the process from preparation of guide information of a roundabout to display. It is a flowchart which shows an example of the detailed process of preparation of the guidance information of a roundabout. It is a figure explaining an example of calculation of an escape angle. It is a figure explaining an example of calculation of a correction angle. It is a figure explaining an example of a specific of advancing direction. It is a figure which shows an example of the advancing direction icon. It is a figure which shows an example of adjustment of the advancing direction icon. It is a figure which shows the structure of an example of the route guidance system containing a route guidance apparatus and a route guidance server.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Configuration of route guidance device>
First, the configuration of the route guidance device 10 according to the present embodiment will be described with reference to FIG. FIG. 1 is a diagram illustrating a configuration of an example of a route guidance device 10 according to the present embodiment.

  The route guidance device 10 according to the present embodiment is a navigation device (so-called car navigation) or the like mounted on a vehicle or the like. In addition, the route guidance apparatus 10 which concerns on this embodiment may be various electronic devices, such as a smart phone and a tablet terminal which have the function similar to a car navigation, for example.

  As shown in FIG. 1, a route guidance program 100 is installed in the route guidance device 10 according to the present embodiment. In addition, the route guidance device 10 according to the present embodiment includes a map data storage unit 110, a network data storage unit 120, and a guidance information data storage unit 130.

  The route guidance device 10 uses the route guidance program 100 to, for example, a route from the current location to the destination based on the destination or waypoint input by the user and the network data stored in the network data storage unit 120. Explore.

  Then, the route guidance device 10 displays the searched route on the map indicated by the map data stored in the map data storage unit 110 by the route guidance program 100. At this time, the route guidance device 10 uses the route guidance program 100 to create guidance information (for example, a traveling direction icon for guiding the traveling direction) created from the guidance information data stored in the guidance information data storage unit 130. Or an enlarged image of an intersection) on a map.

  Thereby, the route guidance apparatus 10 which concerns on this embodiment can perform route guidance to the destination with respect to a user.

  The map data is data for displaying a map on the route guidance device 10 and is classified according to the type of display target such as green spaces, rivers, roads, railroads, prefectures, etc., and latitude and longitude, etc. Are managed in a known mesh. The map data classified for each type of display target is displayed by being drawn for each mesh on a layer predetermined for each type according to the scale. Therefore, for example, the route guidance program 100 combines and superimposes one or more mesh-like layers on which map data classified for each type of display object is drawn, thereby superimposing the map on the route guidance device 10. Is displayed.

  The network data is data used for route search and the like. For example, node information indicating various points such as intersections, branch points, places where road attributes change, places where road width changes (node information) ) And link information (link information) connecting the nodes. The node information includes, for example, information such as a node number, latitude / longitude, intersection name (kanji and reading), and presence / absence of a traffic light. The link information includes, for example, information such as link length, coordinate point sequence, link cost, node numbers of nodes at both ends of the link, road attributes, traveling direction, altitude (altitude), and the like. Therefore, the route guidance program 100 searches for a route by using a known algorithm such as the Dijkstra method so that the cost of the link from the current location to the destination is minimized.

  Furthermore, the guidance information data is image data, audio data, and the like for creating guidance information. As described above, the guidance information is, for example, a traveling direction icon for guiding a traveling direction, an enlarged image of an intersection, or the like. The guidance information includes, for example, voice information for guiding the traveling direction, voice information for guiding that the vehicle has approached a predetermined facility, and the like. Furthermore, the guidance information includes, for example, a facility note indicating a facility name of a predetermined facility, an image indicating a road sign, and the like.

  As described above, the route guidance device 10 according to the present embodiment provides route guidance to a destination by displaying a route on a map and displaying guidance information. Here, guidance information when the route searched by the route guidance device 10 passes through a roundabout is described with reference to FIG. FIG. 2 is a diagram illustrating an example of guidance information for a roundabout.

  As shown in FIG. 2, the route guidance device 10 displays a route guidance screen G100 for performing route guidance from the current location P to the destination according to a route RT passing through the roundabout RA. When the user's current location P (that is, the current location P of the route guidance device 10) approaches the roundabout RA, the route guidance device 10 causes the route guidance program 100 to display guidance information GD on the route guidance screen G100.

  The guidance information GD includes, for example, an enlarged image GA of the roundabout RA, a distance DT from the current location P to the roundabout RA, a travel direction icon IC for guiding the travel direction at the roundabout RA, and the like.

  At this time, the route guidance apparatus 10 according to the present embodiment, as will be described later, a link (entrance link) indicating a road where the user enters the roundabout RA according to the route RT and the user escapes from the roundabout RA according to the route RT. A traveling direction icon IC for guiding an appropriate traveling direction at the circular intersection RA is displayed based on the angle between the point of departure (escape point) and the straight line passing through the center of the circular intersection RA.

  Thereby, in the route guidance apparatus 10 which concerns on this embodiment, it becomes possible to perform the route guidance to an appropriate advancing direction in the roundabout RA. Note that the route guidance device 10 according to the present embodiment may output, for example, a voice corresponding to the above-described distance DT or a voice corresponding to the traveling direction icon IC as the guidance information.

<Hardware configuration>
Next, the hardware configuration of the route guidance apparatus 10 according to the present embodiment will be described with reference to FIG. FIG. 3 is a diagram illustrating a hardware configuration of an example of the route guidance device 10 according to the present embodiment.

  As illustrated in FIG. 3, the route guidance device 10 according to the present embodiment includes an input device 301, a display device 302, an external I / F 303, a communication I / F 304, and a ROM (Read Only Memory) 305. . The route guidance device 10 according to the present embodiment includes a RAM (Random Access Memory) 306, a CPU (Central Processing Unit) 307, a storage device 308, a GPS (Global Positioning System) receiver 309, a speaker 310, and the like. Have Further, these hardware are connected to each other by a bus B.

  The input device 301 is, for example, a touch panel, various buttons, and the like, and is used by the user to perform various inputs (for example, input of a destination or waypoint) to the route guidance device 10. The display device 302 is, for example, an LCD (Liquid Crystal Display) or the like, and displays a processing result by the route guidance device 10.

  The external I / F 303 is an interface with an external device. The external device includes a recording medium 303a. The route guidance device 10 can read and write to the recording medium 13a via the external I / F 303.

  Examples of the recording medium 303a include a CD, a DVD, an SD memory card, and a USB memory. Note that the route guidance program 100 may be stored in the recording medium 303a.

  The communication I / F 304 is an interface for the route guidance device 10 to communicate with other devices. The route guidance device 10 can perform data communication with other devices or the like via the communication I / F 304.

  The storage device 308 is a non-volatile memory that stores programs and data, and is, for example, an HDD (Hard Disk Drive), an SSD (Solid State Drive), or the like. The programs and data stored in the storage device 308 include a route guidance program 100, an OS (Operating System) that is basic software for controlling the route guidance device 10 as a whole.

  The RAM 306 is a volatile semiconductor memory that temporarily stores programs and data. The ROM 305 is a non-volatile semiconductor memory that can retain programs and data even when the power is turned off. The ROM 305 stores, for example, data such as OS settings and network settings.

  The CPU 307 is an arithmetic unit that implements control of the entire route guidance device 10 and various functions by reading programs and data from the ROM 305, the storage device 308, and the like onto the RAM 306 and executing processing based on the programs and data. .

  The GPS receiver 309 receives a predetermined radio wave from the GPS, and measures the latitude and longitude indicating the current position of the route guidance device 10 (that is, the current position of a vehicle or the like on which the route guidance device 10 is mounted). . The GPS receiver 309 may be able to measure the altitude of the route guidance device 10. The speaker 310 outputs sound (sound, etc.).

  The route guidance device 10 according to the present embodiment can implement various processes as described later by having the hardware configuration shown in FIG.

<Functional configuration>
Next, the functional configuration of the route guidance apparatus 10 according to the present embodiment will be described with reference to FIG. FIG. 4 is a diagram illustrating a functional configuration of an example of the route guidance device 10 according to the embodiment.

  As illustrated in FIG. 4, the route guidance apparatus 10 according to the present embodiment includes a route search processing unit 101, a guidance information creation processing unit 102, an output determination processing unit 103, and an output processing unit 104. Each of these functional units is realized by processing that the route guidance program 100 installed in the route guidance device 10 causes the CPU 307 to execute.

  In addition, the route guidance device 10 according to the present embodiment includes the map data storage unit 110, the network data storage unit 120, and the guidance information data storage unit 130 as described above. Each of these storage units can be realized using the storage device 308, for example. Note that at least one of these storage units may be realized using a storage device or the like connected to the route guidance device 10 via a network.

  The route search processing unit 101 searches for a route from the current location to the destination based on, for example, the destination or waypoint input by the user and the network data stored in the network data storage unit 120. As described above, the route search processing unit 101 uses a known algorithm such as the Dijkstra method to search for a route so that the cost of the link from the current location to the destination is minimized.

  The guide information creation processing unit 102 performs processing for creating guide information from the guide information data stored in the guide information data storage unit 130. Here, the guidance information creation processing unit 102 includes an escape angle calculation unit 105, a correction angle calculation unit 106, an angle correction unit 107, a traveling direction specification unit 108, and a guidance information creation unit 109.

  The escape angle calculation unit 105 calculates an angle (escape angle) between the approach link and a straight line passing through the exit point and the center of the roundabout RA in order to create the guidance information GD at the roundabout RA. The correction angle calculation unit 106 calculates an angle (correction angle) for correcting the escape angle based on the link connected to the roundabout RA. The angle correction unit 107 corrects the escape angle calculated by the escape angle calculation unit 105 with the correction angle calculated by the correction angle calculation unit 106.

  The traveling direction identification unit 108 identifies the traveling direction at the roundabout RA (the traveling direction for exiting the roundabout RA according to the route RT) from the escape angle corrected by the angle correction unit 107. The guide information creating unit 109 creates guide information GD including a travel direction icon IC for guiding the travel direction specified by the travel direction specifying unit 108.

  The output determination processing unit 103 determines whether or not the output processing unit 104 outputs the guidance information GD created by the guidance information creation processing unit 102 based on the current location P of the user, for example. That is, the output determination processing unit 103 determines, for example, whether or not the distance from the current location P of the user to the roundabout RA is within a predetermined distance.

  The output processing unit 104 displays a route guidance screen G100 and the like on the display device 302. Further, the output processing unit 104 displays guidance information GD and the like on the display device 302. Further, the output processing unit 104 outputs audio information included in the guidance information GD from the speaker 310 or the like. In addition to the route guidance screen, the output processing unit 104 displays various screens on the display device 302 such as a screen for a user to input a destination, a waypoint, and the like.

  The map data storage unit 110 stores the map data described above. The network data storage unit 120 stores the network described above. The guide information data storage unit 130 stores the guide information data described above.

<Details of processing>
Next, details of processing of the route guidance apparatus 10 according to the present embodiment will be described.

  Hereafter, for example, when the user inputs a destination, the route search processing unit 101 searches for the route RT, and a route guidance screen G200 as shown in FIG. 5 is displayed on the display device 302 by the output processing unit 104. Assume that it is displayed. That is, as illustrated in FIG. 5, the output processing unit 104 of the route guidance device 10 displays a route guidance screen G200 in which a route RT from the current location P to the destination through the roundabout RA is superimposed on the map. Assume that it is displayed above. The current location P is, for example, the latitude and longitude of the route guidance device 10 measured by the GPS receiver 309.

  At this time, when the user moves from the current location P along the route RT, processing from creation to display of the guidance information GD when the user approaches the roundabout RA will be described with reference to FIG. FIG. 6 is a flowchart illustrating an example of processing from creation to display of guidance information at a roundabout.

  First, the guidance information creation processing unit 102 creates guidance information GD for the roundabout RA according to the current location P of the user, for example (step S601). Here, for example, the guide information creation processing unit 102 determines that the current location P of the user is within a predetermined distance from the roundabout RA, and a predetermined point on the route RT (this point is a “guidance point” or “guidance” When it reaches the “point”, the guide information GD of the roundabout RA is created. Details of the processing in this step will be described later.

  Next, the output determination processing unit 103 determines whether or not the user's current location P has approached the roundabout RA (step S602). That is, the output determination processing unit 103 determines whether or not the distance from the current location P of the user to the roundabout RA is within a predetermined distance.

  If it is determined in step S602 that the current location P of the user has approached the roundabout RA, the output processing unit 104 outputs the guidance information GD created by the guidance information creation processing unit 102 (step S603). That is, the output processing unit 104 displays the guidance information GD created by the guidance information creation processing unit 102 on the display device 302. Further, when the guidance information GD created by the guidance information creation processing unit 102 includes voice information, the output processing unit 104 outputs voice corresponding to the voice information from the speaker 310 or the like.

  Thereby, the route guidance apparatus 10 according to the present embodiment can provide route guidance for heading to the destination according to the route RT when the current location P of the user approaches the roundabout RA.

  Moreover, the route guidance device 10 according to the present embodiment displays a traveling direction icon IC or the like that appropriately represents the traveling direction at the roundabout RA, as will be described later. That is, as will be described later, the route guidance apparatus 10 according to the present embodiment can display a traveling direction icon IC representing an appropriate traveling direction, for example, even if the road connected to the roundabout RA is a two-way road. it can.

  Here, the details of the guide information creation process in step S601 will be described with reference to FIG. FIG. 7 is a flowchart showing an example of detailed processing for creating guidance information for a roundabout.

  First, the escape angle calculation unit 105 calculates an angle (escape angle) θ between the approach link and a straight line passing through the escape point and the center of the roundabout RA (step S701).

  Here, calculation of the escape angle θ will be described with reference to FIG. FIG. 8 is a diagram illustrating an example of calculating the escape angle.

In the example shown in FIG. 8, a link LK ₁ indicating a road entering the roundabout RA according to the route RT is an “entry link”, and a link LK ₂ indicating a road exiting the roundabout RA according to the route RT is an “exit link”. . In addition, point to escape from the annular intersection RA according to the route RT Q (ie, the intersection of the exit link LK ₂ and the roundabout RA) is "escape point".

At this time, the escape angle calculation unit 105 determines the angle θ (in the example shown in FIG. 8) between the straight line L ₁ that is an extension of the approach link LK ₁ and the straight line L ₂ that passes through the center O of the roundabout RA and the escape point Q. , Θ = 48 °). This θ is the escape angle.

In the example illustrated in FIG. 8, the link LK ₃ is a link in the opposite direction to the link LK ₁ . That is, if the link LK ₁ is an uplink link entering the roundabout RA, the link LK ₃ is a downlink link indicating the same road (or corresponding road) as the link LK ₁ . Therefore, the road indicated by the link LK ₁ and the road indicated by the link LK ₃ form a two-way road.

Similarly, in the example illustrated in FIG. 8, the link LK ₄ is a link in the opposite direction with respect to the link LK ₂ . That is, if the link LK ₂ and downstream links to escape from the annular intersection RA, link LK ₄ is an uplink link indicating the link LK ₂ the same road (or corresponding road). Therefore, the road indicated by link LK _2, a road indicated by link LK _4, constituting the Nijo path.

  Next, the correction angle calculation unit 106 calculates angles (correction angles) θ1 and θ2 for correcting the escape angle θ based on the link connected to the roundabout RA (step S702).

  Here, calculation of the correction angles θ1 and θ2 will be described with reference to FIG. FIG. 9 is a diagram illustrating an example of calculating the correction angle.

As shown in FIG. 9, the link LK ₁ and roundabout point an intersection between RA S, the link LK ₂ and roundabout point an intersection between RA Q, the link LK ₃ and roundabout point an intersection between RA T, links the intersection of the LK ₄ and the roundabout RA and point R. Further, as shown in FIG. 9, a straight line connecting the center O of the roundabout RA and the point S is L ₃ , a straight line connecting the center O and the point Q is L ₄ , and a straight line connecting the point S and the point T is L _5. Let L ₆ be a straight line connecting point Q and point R.

In this case, the straight line L _3, the angle between the perpendicular line beat the straight line L ₅ from the center O is .theta.1. Similarly, the straight line L _6, the angle between the perpendicular line beat the straight line L ₆ from the center O is .theta.2.

  θ1 and θ2 can be calculated by the following (Equation 1) and (Equation 2), respectively. Θ1 and θ2 calculated in this way are correction angles.

In the example shown in FIG. 9, a road indicated by link LK ₁ leading to roundabout RA, a case has been described in which the road indicated by link LK ₃ leading to roundabout RA constitutes the Nijo path, the link LK ₁ and When the link LK ₃ does not constitute a double path (that is, when the link LK ₁ and the link LK ₃ are the same), the correction angle θ1 = 0 °. Similarly, when the road represented by the link LK _2, a road indicated by link LK ₄ does not constitute the Nijo path, the correction angle θ2 = 0 °.

  Next, the angle correction unit 107 corrects the escape angle θ calculated in the above step S701 with the correction angles θ1 and θ2 calculated in the above step S702, thereby calculating the corrected escape angle φ (step S703). ). That is, the angle correction unit 107 calculates the corrected escape angle φ = θ− (θ1 + θ2).

  Next, the traveling direction identifying unit 108 identifies the traveling direction at the roundabout RA (the traveling direction for exiting the roundabout RA according to the route RT) from the escape angle φ calculated in step S703 (step S704). .

  Here, the traveling direction specifying unit 108 specifies the traveling direction with reference to, for example, the traveling direction specifying table 1000 shown in FIG.

  That is, when the corrected escape angle φ is 335 ° or more or 25 ° or less, the traveling direction identifying unit 108 identifies the traveling direction at the roundabout RA as the “straight traveling direction”. Similarly, when the escape angle φ after correction is larger than 25 ° and equal to or smaller than 45 °, the traveling direction identifying unit 108 identifies the traveling direction at the roundabout RA as “oblique leftward”. Similarly, when the escape angle φ after correction is 315 ° or more and less than 335 °, the traveling direction identifying unit 108 identifies the traveling direction at the roundabout RA as “oblique rightward”. .

  Thus, the traveling direction specifying unit 108 refers to the traveling direction specifying table 1000 shown in FIG. 10 and specifies the traveling direction at the roundabout RA from the corrected escape angle φ. The traveling direction specification table 1000 illustrated in FIG. 10 is stored in, for example, the storage device 308 of the route guidance device 10.

  Next, the guidance information creation unit 109 creates guidance information GD including a traveling direction icon IC for guiding the traveling direction specified in step S704 (step S705).

  Here, for example, as illustrated in FIG. 11, the guide information creation unit 109 includes the travel direction icon IC using images 410 to 480 corresponding to the travel direction identified in step S704 as the travel direction icon IC. Guide information GD is created.

  That is, when the traveling direction specified in step S704 is “straight ahead”, the guidance information creating unit 109 creates guidance information GD including the traveling direction icon IC with the image 410 as the traveling direction IC. Similarly, when the traveling direction identified in step S704 is “oblique right”, the guidance information creating unit 109 creates guidance information GD including the traveling direction icon IC using the image 420 as the traveling direction icon IC. To do. Similarly, when the traveling direction identified in step S704 is “turn right”, the guidance information creating unit 109 uses the image 430 as the traveling direction icon IC and receives the guidance information GD including the traveling direction icon IC. create.

  Note that the images 410 to 480 shown in FIG. 11 are examples of images used as the traveling direction eincon IC when passing in a clockwise direction inside a roundabout (that is, when passing on the left side). For example, when traveling in a counterclockwise direction inside a roundabout (that is, when traveling on the right side), an image for traveling in the counterclockwise direction through the roundabout and traveling in the traveling direction is associated with the traveling direction. It has been.

  As shown in FIG. 11, the guidance information creating unit 109 sets the image associated with the traveling direction specified by the traveling direction specifying unit 108 as the traveling direction icon IC, and then uses the traveling direction icon IC. Guidance information GD including is created. Images 410 to 480 shown in FIG. 11 are stored in the guide information data storage unit 130 or the like in association with the traveling direction.

  In the example illustrated in FIG. 11, the case where the traveling direction and the image are associated with each other has been described. However, the present invention is not limited to this. For example, the traveling direction is associated with the voice that announces the traveling direction. May be. Thereby, the guidance information creation unit 109 can create guidance information GD including a voice for announcing the traveling direction.

  In addition, the guide information creation unit 109 may adjust the image associated with the traveling direction specified by the traveling direction specifying unit 108 and use the adjusted image as the traveling direction icon IC. For example, as illustrated in FIG. 12, the guidance information creation unit 109 indicates the direction of the arrow in the image 410 associated with the traveling direction identified by the traveling direction identifying unit 108, for example, the direction of the exit link. The image 411 after adjustment may be used as the traveling direction icon IC. Thus, a more accurate traveling direction can be represented by the traveling direction icon IC at the circular intersection RA.

<Summary>
As described above, the route guidance device 10 according to the present embodiment provides the guidance information GD including the traveling direction icon IC for guiding the traveling direction at the circular intersection RA when the current location P of the user approaches the circular intersection RA. indicate.

  At this time, the route guidance apparatus 10 according to the present embodiment corrects the escape angle θ based on the link connected to the roundabout RA, and then specifies the traveling direction from the corrected escape angle φ. Thereby, in the route guidance device 10 according to the present embodiment, for example, even when the road indicated by the link connected to the roundabout RA is a double road or the like, the traveling direction icon IC for guiding an appropriate traveling direction is displayed. Will be able to.

  In the present embodiment, it has been described that the route guidance device 10 performs all processing such as route search and creation of guidance information. However, some of these processes are performed by the route guidance device 10 and the network. N may be performed by the route guidance server 20 connected via N.

  That is, this embodiment can also be realized, for example, by the route guidance system 1 shown in FIG. In the route guidance system 1 shown in FIG. 13, the route guidance program 200 is installed, and the route guidance server 20 including the map data storage unit 210, the network data storage unit 220, and the guidance information data storage unit 230 is connected to the network N. Via the route guidance device 10 so as to be communicable.

  At this time, the route guidance server 20 may perform processing such as route search and creation of guidance information by the route guidance program 200, and transmit the results of these processing to the route guidance device 10. . This eliminates the need for the route guidance apparatus 10 to perform processing such as route search and creation of guidance information.

  Note that the present invention is not limited to the specifically disclosed embodiments, and various modifications and changes can be made without departing from the scope of the claims.

DESCRIPTION OF SYMBOLS 10 Route guidance apparatus 100 Route guidance program 101 Route search process part 102 Guidance information creation process part 103 Output determination process part 104 Output process part 105 Escape angle calculation part 106 Correction angle calculation part 107 Angle correction part 108 Travel direction specific | specification part 109 Guide information Creation unit 110 Map data storage unit 120 Network data storage unit 130 Guide information data storage unit

Claims (8)

A route guidance device for guiding a user's traveling direction at a roundabout,
A first angle θ between an entrance link for the user to enter the roundabout, and a first straight line connecting the exit point indicating the point at which the user exits from the roundabout and the center of the roundabout. First calculating means for calculating
Second calculating means for calculating a second angle θ1 and a third angle θ2 for correcting the first angle θ based on a link indicating a road connected to the roundabout;
A fourth angle φ obtained by correcting the first angle θ calculated by the first calculation unit with the second angle θ1 and the third angle θ2 calculated by the second calculation unit. Correction means for calculating;
Guiding means for guiding the traveling direction corresponding to the fourth angle φ calculated by the correcting means to the user;
A route guidance apparatus having The second calculation means includes:
Based on the approach link and the first link corresponding to the approach link, the second angle θ1 is calculated,
The route guidance device according to claim 1, wherein the third angle θ2 is calculated based on an escape link for the user to escape from the roundabout and a second link corresponding to the escape link. The first link is a link indicating a road that is the same as or corresponding to the entry link, and is a link in a reverse direction with respect to the entry link;
The route guidance device according to claim 2, wherein the second link is a link indicating a road that is the same as or corresponding to the escape link, and is a link in a reverse direction with respect to the escape link. The correction means includes
The route guidance according to any one of claims 1 to 3, wherein the fourth angle φ is calculated by subtracting the second angle θ1 and the third angle θ2 from the first angle θ. apparatus. The guiding means includes
The guide direction is guided to the user after adjusting the traveling direction corresponding to the fourth angle φ according to the direction of the exit link for the user to escape from the roundabout. The route guidance device according to one item. The guiding means includes
The route guidance device according to any one of claims 1 to 5, wherein the route guidance device guides the user by outputting an image or sound indicating a traveling direction corresponding to the fourth angle φ. A route guidance method used in a route guidance device for guiding a user's traveling direction at a roundabout,
A first angle θ between an entrance link for the user to enter the roundabout, and a first straight line connecting the exit point indicating the point at which the user exits from the roundabout and the center of the roundabout. A first calculation procedure for calculating
A second calculation procedure for calculating a second angle θ1 and a third angle θ2 for correcting the first angle θ based on a link indicating a road connected to the roundabout;
A fourth angle φ obtained by correcting the first angle θ calculated by the first calculation procedure with the second angle θ1 and the third angle θ2 calculated by the second calculation procedure. A correction procedure to calculate,
A guidance procedure for guiding the user in the traveling direction corresponding to the fourth angle φ calculated by the correction procedure;
A route guidance method in which a computer executes. A route guidance device for guiding the direction of travel of a user at a roundabout,
A first angle θ between an entrance link for the user to enter the roundabout, and a first straight line connecting the exit point indicating the point at which the user exits from the roundabout and the center of the roundabout. First calculating means for calculating
Second calculating means for calculating a second angle θ1 and a third angle θ2 for correcting the first angle θ based on a link indicating a road connected to the roundabout;
A fourth angle φ obtained by correcting the first angle θ calculated by the first calculation unit with the second angle θ1 and the third angle θ2 calculated by the second calculation unit. Correction means for calculating,
Guiding means for guiding the user in the traveling direction corresponding to the fourth angle φ calculated by the correcting means;
Program to function as.

Images