JP5009021B2 - Navigation device - Google Patents

Description

  The present invention relates to a technology that is mounted on a moving body such as a vehicle and searches for and displays a route to a set destination.

  Patent Document 1 discloses a vehicle route guidance device that displays a re-search key for instructing re-search of a route when it is detected that the current position of the vehicle has deviated from the route during guidance of a set route. Has been. When the re-search key is operated, the vehicular route guidance device performs the re-search of the route, so that the re-search of the route can be executed at a timing according to the user's intention.

JP-A-6-44490

  The above-mentioned Patent Document 1 does not clearly describe how to detect that the current position of the vehicle has deviated from the route. It is often executed when the position and the guide route are separated by a predetermined distance or more, or when the angle between the traveling direction of the vehicle and the direction of the guide route is a predetermined angle or more.

  However, for example, in a place where a highway and a general road are running side by side, if the vehicle enters the general road from the highway, or if the vehicle enters the highway from the general road, the current vehicle Since the distance between the position and the guide route is short and the angle between the traveling direction of the vehicle and the direction of the guide route is small, it may not be detected that the current position of the vehicle is off the route.

  In that case, in the technique of the above-mentioned Patent Document 1, not only the re-search button is not displayed, but even the automatic re-search of the route is not executed, and the vehicle route guidance device is a road different from the road on which the vehicle actually travels. You will continue to be guided by the route drawn above. Therefore, the next entrance to the expressway is used to guide the user to the correct route for users who continue to travel on the general road without entering the expressway at the junction where the expressway should enter the expressway. However, there is a problem of providing a route guidance route on the assumption that the vehicle is traveling on a highway. In such a case, the estimated value of the arrival time is calculated on the assumption that the vehicle is traveling on a highway. Therefore, the estimated value is largely deviated from the estimated value calculated based on the actually traveling road. There is a problem of end.

  The present invention has been made in view of the above circumstances, and the object of the present invention is more prompt when route guidance is performed based on a route drawn on a road different from the road on which the vehicle is running. The purpose is to be able to correct the guide route.

  In order to solve the above problems, the navigation device of the present invention displays a switching button when a vehicle passes a branch point on a guidance route connected to a parallel road, and the switching button is operated. The guidance route is switched to the route passing through the parallel road and displayed.

Further, for example, a first aspect of the present invention is a navigation device that is mounted on a vehicle and searches for and displays a route to a set destination,
Link data storage means for storing link data which is information relating to a link indicating a road;
A current position calculating means for calculating a current position of the vehicle;
Based on information indicating a departure point and a destination point received from a user, using the link data, a guidance route search unit that searches for a guidance route from the departure point to the destination point;
Route guidance means for performing route guidance based on the current position of the vehicle and the guidance route;
A parallel route search means for searching a parallel route that is a route leading to the destination through a parallel road connected to a branch point on the guidance route;
With reference to the link data and the current position of the vehicle, a switching button display means for displaying a switching button when the vehicle passes a branch point on the guidance route connected to the parallel road,
Switching instruction means for instructing the route guidance means when the switch button is operated, and for guiding the parallel route as a guidance route ;
The switching button display means includes
A predetermined time elapses after the vehicle passes the branch point on the guide route connected to the parallel road, or the vehicle passes the branch point on the guide route connected to the parallel road. If the recalculation of the induced path after is performed, to provide a navigation apparatus characterized that you cancel the display of the switching button.

Further, for example, a second aspect of the present invention is a navigation device that is mounted on a vehicle and searches for and displays a route to a set destination,
Link data storage means for storing link data which is information relating to a link indicating a road;
A current position calculating means for calculating a current position of the vehicle;
Based on information indicating a departure point and a destination point received from a user, using the link data, a guidance route search unit that searches for a guidance route from the departure point to the destination point;
Route guidance means for performing route guidance based on the current position of the vehicle and the guidance route;
A parallel route search means for searching a parallel route that is a route leading to the destination through a parallel road connected to a branch point on the guidance route;
With reference to the link data and the current position of the vehicle, a switching button display means for displaying a switching button when the vehicle passes a branch point on the guidance route connected to the parallel road,
Switching instruction means for instructing the route guidance means when the switch button is operated, and for guiding the parallel route as a guidance route ;
The switching button display means includes
The vehicle travels a predetermined distance after passing the branch point on the guidance route connected to the parallel road, or the branch on the guidance route where the vehicle is connected to the parallel road If the recalculation of the guide route is executed after passing through the point, to provide a navigation apparatus characterized that you cancel the display of the switching button.

  According to the navigation device of the present invention, when the route guidance is performed based on a route drawn on a road different from the traveling road, the guidance route can be corrected more quickly.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a system configuration diagram showing a configuration of a navigation system 10 according to an embodiment of the present invention. The navigation system 10 includes a speaker 11, a display device 12, an input device 13, a sensor 14, and a navigation device 20. The navigation device 20 includes a route guidance unit 21, a guidance route search unit 22, a switching instruction unit 23, a switching button display unit 24, a parallel route search unit 25, a current position calculation unit 26, and a link data storage unit 27.

  As shown in FIG. 2, for example, the link data storage unit 27 stores data relating to links as mesh data 270 for each predetermined map area. Each mesh data 270 includes a mesh ID 271 that identifies each mesh and link data 272 that is data related to a link in the mesh.

  Each link data 272 is connected to a link ID 273 for identifying each link, a link start node coordinate 274, a link end node coordinate 275, a link road type 276, a link length 277, and a link start node. A start connection link 278 that is identification information of another link, an end connection link 279 that is identification information of another link connected to the end node of the link, and the like are included. In addition, the link data storage unit 27 also stores map data other than roads (such as place names, landmark coordinates, and terrain data).

  The sensor 14 is, for example, a GPS (Global Positioning System) receiver, a direction sensor, a distance sensor, and the like, and measures a GPS signal transmitted from a geodetic satellite, a traveling direction of the vehicle, a moving distance of the vehicle, and the like, and obtains measurement information. The current position calculation unit 26 is supplied.

  Based on the measurement information from the sensor 14 and the link data stored in the link data storage unit 27, the current position calculation unit 26, for example, each time a vehicle on which the navigation device 20 is mounted moves, for example, a map matching or the like. Thus, the current position of the vehicle is calculated, and information indicating the calculated current position of the vehicle is provided to the route guidance unit 21, the switching button display unit 24, and the parallel route search unit 25.

  When the search information including the coordinates of the departure point and the destination point, search conditions, and the like is received from the user via the input device 13 such as a touch panel, the guide route search unit 22 links data in the link data storage unit 27. The route from the departure point to the destination point is searched using an algorithm such as Dijkstra method based on the search information, and the search result is sent to the route guide unit 21 and displayed on the display device 12. To do. Note that the guidance route search unit 22 may perform a route search using the current position of the vehicle as a departure point.

  The route guidance unit 21 receives a search result received from the guidance route search unit 22 when receiving a route guidance instruction together with information specifying the route searched by the guidance route search unit 22 from the user via the input device 13. The route specified by the user is extracted. Then, the route guidance unit 21 sends the extracted route to the switching button display unit 24 and the parallel route search unit 25 as a guidance route.

  Further, the route guidance unit 21 displays the guidance route together with the current position of the vehicle calculated by the current position calculation unit 26 and the link data and map data near the current position stored in the link data storage unit 27. By displaying on the display device 12, route guidance is started.

  Then, the route guidance unit 21 refers to the current position of the vehicle calculated by the current position calculation unit 26 and the link data stored in the link data storage unit 27, and is within a predetermined distance ahead of the vehicle on the guidance route. In addition, when there is a guidance point whose direction of travel is to be indicated, an image relating to the guidance point is displayed on the display device 12, and a voice indicating the guidance is reproduced via the speaker 11 to perform route guidance. Further, when instructed by the switching instruction unit 23, the route guidance unit 21 performs route guidance using the parallel route searched by the parallel route search unit 25 described later as a new guidance route.

  In addition, the route guidance unit 21 performs auto-reroute when the current position of the vehicle is separated from the guidance route by a predetermined distance or when the angle between the traveling direction of the vehicle and the direction of the guidance route is a predetermined angle or more. The updated guidance route is sent to the display device 12, the switching button display unit 24, and the parallel route search unit 25 together with the fact that the auto-reroute has been performed.

  The parallel route search unit 25 refers to the current position of the vehicle calculated by the current position calculation unit 26 and the link data stored in the link data storage unit 27 on the guidance route received from the route guidance unit 21. It is determined whether or not there is a branch point connected to the parallel road within a predetermined distance in front of the vehicle (for example, within 1 km).

  Here, the parallel road is a link that is not included in the guidance route received from the route guidance unit 21 as shown in FIG. 3, for example, and is included in the guidance route at the branch point 31 on the guidance route. In this case, the angle θ formed by the link 32 connected to the branch point 31 is a link 33 that is less than a predetermined angle (for example, 45 degrees).

  As another example, the parallel road is a link or a link group not included in the guidance route received from the route guidance unit 21 as shown in FIG. The link within a predetermined distance (for example, within 300 m) along the branching link may point to a link included within a predetermined distance (for example, 100 m) from the guide route.

  In the example shown in FIG. 4, the link 40, the link 42, and the link 43 are included in the guide route, and the link 44, the link 45, the link 46, and the link 48 are branched from the branch point 41 on the guide route. Is configured. In FIG. 4, the portion of the link included from the branch point 41 to the point 47 advanced 300 m along the link 44, the link 45, the link 46, and the link 48 is included in the range of L = 100 m from the guidance route. Therefore, a part of the link 44, the link 45, the link 46, and the link 48 constitutes a parallel road.

  When there is a branch point connected to the parallel road within a predetermined distance in front of the vehicle on the guidance route, the parallel path search unit 25 refers to the link data storage unit 27 and points on the parallel road Is the starting point, the end point of the guidance route received from the route guidance unit 21 is the destination point, and if there are other search conditions or the like, the parallel route that is the route passing through the parallel road is searched.

  The switch button display unit 24 refers to the link data in the link data storage unit 27 and the current position of the vehicle calculated by the current position calculation unit 26, so that the vehicle branches on the guidance route connected to the parallel road. When the point is passed, for example, as shown in FIG. 5, the switching button 54 is displayed in the screen 50 displayed on the display device 12, and the area information of the switching button 54 in the screen 50 is displayed in the switching instruction unit 23. Notice. Further, the switching button display unit 24 cancels the display of the switching button on the display device 12 when instructed by the switching instruction unit 23.

  In the example illustrated in FIG. 5, the road 51 is, for example, a highway, and the road 52 is, for example, a general road laid along the road 51. A vehicle traveling on the road 52 can enter the road 51 at a branch point 56 (for example, an interchange). The guide route 53 is drawn at the branch point 56 so as to enter the road 51 from the road 52, and the portion of the road 52 beyond the branch point 56 in the traveling direction of the vehicle is the parallel road in the present embodiment. It is composed.

  When the switching instruction unit 23 detects that the area in the screen notified from the switching button display unit 24 has been operated via the input device 13, the switching instruction unit 23 instructs the route guidance unit 21 to switch the guidance route. The route guidance unit 21 is caused to perform route guidance using the parallel route searched by the parallel route search unit 25 as the guidance route. Then, the switching instruction unit 23 instructs the switching button display unit 24 to cancel the display of the switching button.

  An example of the screen 50 after the switching button 54 is operated by the user is shown in FIG. When the switch button 54 is operated by the user, a route 57 passing through the parallel road is newly displayed on the screen 50 as a guide route. Further, after the switching button 54 is operated by the user, the switching button 54 is not displayed on the screen 50.

  FIG. 7 is a flowchart showing an example of the operation of the navigation device 20. For example, the navigation device 20 starts the operation shown in this flowchart at a predetermined timing such as when the vehicle engine is started.

  First, the guidance route search unit 22 determines whether or not search information including information indicating a departure point and a destination point has been received from the user via the input device 13 (S100). When the search information is not received (S100: No), the guidance route search unit 22 repeats step S100 until the search information is received.

  When the search information is received (S100: Yes), the guidance route search unit 22 refers to the link data in the link data storage unit 27 using the information indicating the departure point and the destination point included in the received search information. Then, the route from the departure point to the destination point is searched, and the search result is sent to the route guide unit 21 and displayed on the display device 12 (S101). Then, the route guidance unit 21 determines whether a route guidance instruction is received from the user via the input device 13 together with information specifying the route searched by the guidance route search unit 22 (S102).

  When a predetermined time has elapsed after the search result is displayed, or when a cancellation is received from the user, the route guidance unit 21 determines that a route guidance instruction has not been accepted (S102: No), and a guidance route search unit. 22 executes the process shown in step S100 again. When the route guidance instruction is received from the user (S102: Yes), the route guidance unit 21 extracts the route specified by the user from the search result received from the guidance route search unit 22, and guides the extracted route. The route is sent to the switching button display unit 24 and the parallel route search unit 25 as a route, and a route guidance process described later is executed (S110).

  Then, the route guidance unit 21 determines whether the route guidance is to be terminated by determining whether the vehicle has entered a range within a predetermined distance from the destination point or whether the user has instructed to stop the route guidance. Determine (S103). When the route guidance is continued (S103: No), the navigation device 20 executes the process shown in step S110 again. On the other hand, when the route guidance is terminated (S103: Yes), the guidance route search unit 22 executes the process shown in Step S100 again.

  FIG. 8 is a flowchart showing an example of the route guidance process (S110).

  First, the route guidance unit 21 determines whether a guidance point exists within a predetermined distance ahead of the vehicle on the guidance route (S111). When the guidance point does not exist within a predetermined distance ahead of the vehicle (S111: No), the parallel route search unit 25 executes the process shown in step S114.

  When a guidance point exists within a predetermined distance ahead of the vehicle (S111: Yes), the route guidance unit 21 displays an image related to the guidance point when the guidance point is not a guided point (S112: No). 12 and the route guidance is performed by reproducing the voice indicating the guidance through the speaker 11 (S113).

  Next, the parallel route search unit 25 determines whether or not a branch point connected to the parallel road exists within a predetermined distance ahead of the vehicle on the guidance route received from the route guidance unit 21 (S114). ). If there is no branch point connected to the parallel road within the predetermined distance ahead of the vehicle (S114: No), the navigation device 20 ends the route guidance process shown in this flowchart.

  When there is a branch point connected to the parallel road within a predetermined distance in front of the vehicle (S114: Yes), the parallel path search unit 25 determines that the branch point is not a branch point that has already searched for the parallel path. (S115: No), referring to the link data storage unit 27, search for a parallel running route with the point on the parallel road as the departure point and the destination point as the destination of the guidance route received from the route guidance unit 21 (S116). ). The parallel route search unit 25 determines whether or not the parallel route has already been searched by storing the identification information of the branch point where the parallel route has been searched, for example, until the route guidance is completed.

  Next, the switching button display unit 24 refers to the link data in the link data storage unit 27 and the current position of the vehicle calculated by the current position calculation unit 26, and the guidance route where the vehicle is connected to the parallel road. It is determined whether or not the upper branch point has been passed (S117). When the vehicle does not pass the branch point on the guidance route connected to the parallel road (S117: No), the navigation device 20 ends the route guidance process shown in this flowchart.

  When the vehicle passes a branch point on the guidance route connected to the parallel road (S117: Yes), the switching button display unit 24 displays the switching button on the display device 12 (S118) and The switch button 23 is notified of the switch button area information. Then, the switching instruction unit 23 determines whether or not the screen area of the display device 12 notified from the switching button display unit 24 has been operated via the input device 13 (S119).

  When it is detected that the screen area of the display device 12 notified from the switching button display unit 24 has been operated via the input device 13 (S119: Yes), the switching instruction unit 23 guides the switching of the guidance route. By instructing the unit 21, the route guidance unit 21 is caused to set the parallel route searched by the parallel route search unit 25 as the guidance route (S120). Then, the switching instruction unit 23 instructs the switching button display unit 24 to cancel the display of the switching button, the switching button display unit 24 releases the display of the switching button on the display device 12 (S121), and the navigation device 20 Then, the route guidance process shown in this flowchart is terminated.

  When the screen area of the display device 12 notified from the switch button display unit 24 is not operated via the input device 13 (S119: No), the switch button display unit 24 displays the switch button and then switches. Until the button display is canceled, it is determined whether or not auto-reroute is executed by the route guidance unit 21 (S122). When auto-reroute is executed by the route guidance unit 21 after the switch button is displayed until the display of the switch button is canceled (S122: Yes), the switch button display unit 24 displays the switch button display device. 12 is released (S121).

  When auto-reroute is not executed by the route guidance unit 21 after the switch button is displayed until the display of the switch button is canceled (S122: No), the switch button display unit 24 is connected to the parallel road. It is determined whether or not a predetermined time (for example, 1 minute) has elapsed since passing through the branch point on the guidance route to be performed (S123).

  When a predetermined time has elapsed after passing through a branch point on the guidance route connected to the parallel road (S123: Yes), the switching button display unit 24 cancels the display of the switching button on the display device 12 (S121). . On the other hand, when the predetermined time has not passed since the branch point on the guidance route connected to the parallel road has been passed (S123: No), the navigation device 20 ends the route guidance process shown in this flowchart.

  The navigation device 20 includes a computing device (CPU), a memory such as a ROM or a RAM, an external storage device such as a hard disk, a communication device for communicating with other devices via a network, and a keyboard. This can be achieved by a computer having an interface for transmitting and receiving data to and from an input device such as a button and an output device such as a monitor.

  And each of the route guidance part 21, the guidance route search part 22, the switching instruction | indication part 23, the switch button display part 24, the parallel route search part 25, the present position calculation part 26, and the link data storage part 27 which the navigation apparatus 20 has. The function is realized by the CPU executing a predetermined program loaded on the memory.

  The embodiment of the present invention has been described above.

  As is clear from the above description, according to the navigation device 20 of the present invention, when the route guidance is performed based on a route drawn on a road different from the traveling road, the guidance is performed more quickly. The route can be modified.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist.

  For example, in the above-described embodiment, the switching button display unit 24 cancels the display of the switching button when a predetermined time elapses after being automatically rerouted or passing through a branch point in steps S122 and S123. However, as another form, the switch button display unit 24 cancels the display of the switch button when it is auto-rerouted or travels a predetermined distance (for example, 500 m) after passing through a branch point. Also good.

  Further, in the above-described embodiment, when the parallel route search unit 25 detects a branch point with the parallel road within a predetermined distance ahead of the current position of the vehicle on the route being guided, the route that passes through the parallel road As another form, when the route search unit 22 searches for a route from the departure point and the destination point, it also searches for a parallel road at the same time, and when the switching button is operated, it passes immediately before. The parallel route corresponding to the branching point may be switched to the guidance route.

  In the above-described embodiment, the switching button area is displayed on the screen, and the operation of the switching button is detected via the touch panel. However, as another form, the switching button is connected to a hardware switch such as a dial switch or a joystick. You may make it give a function.

  In the above-described embodiment, the route guidance unit 21, the guidance route search unit 22, the switching instruction unit 23, the switching button display unit 24, the parallel route search unit 25, and the current position calculation unit 26 in the navigation device 20 are ASICs. (Application Specific Integrated Circuit), FPGA (Field Programmable Gate Array), or other integrated logic ICs may be implemented in hardware, DSP (Digital Signal Processor) or general purpose computer may be implemented in software, or A functional block partially realized by hardware or software may be combined.

  In the above-described embodiment, the link data in the link data storage unit 27 may be recorded in a storage device built in the navigation device 20, but the navigation device 20 records the link data in the link data. It may be read from a portable recording medium such as a CD (Compact Disc), a DVD (Digital Versatile Disk), or a memory card.

1 is a system configuration diagram illustrating a configuration of a navigation system 10 according to an embodiment of the present invention. Link is a diagram showing an example of a structure of data stored in the data storage unit 27. It is a key map for explaining an example of a parallel road. It is a conceptual diagram for demonstrating the other example of a parallel road. It is a figure which shows an example of the screen 50 before a guidance route is switched. It is a figure which shows an example of the screen 50 after the guidance route was switched. 4 is a flowchart showing an example of the operation of the navigation device 20. It is a flowchart which shows an example of a route guidance process (S110).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Navigation system, 11 ... Speaker, 12 ... Display device, 13 ... Input device, 14 ... Sensor, 20 ... Navigation device, 21 ... Route guidance part, 22. ..Guide route search unit, 23 ... Switch instruction unit, 24 ... Switch button display unit, 25 ... Parallel route search unit, 26 ... Current position calculation unit, 27 ... Link data storage unit 270 ... mesh data, 271 ... mesh ID, 272 ... link data, 273 ... link ID, 274 ... start node coordinates, 275 ... end node coordinates, 276 ... road Type, 277 ... link length, 278 ... start connection link, 279 ... end connection link, 30 ... link, 31 ... branch point, 32 ... link, 33 ... link, 34 ... 35 ... link 40 ... link 41 ... branch point 42 ... link 43 ... link 44 ... link 45 ... link 46 ... link , 47 ... point, 48 ... link, 50 ... screen, 51 ... road, 52 ... road, 53 ... guide route, 54 ... switching button, 55 ... car Mark 56 ... Branch point 57 ... Path

Claims (2)

A navigation device mounted on a vehicle for searching and displaying a route to a set destination,
Link data storage means for storing link data which is information relating to a link indicating a road;
A current position calculating means for calculating a current position of the vehicle;
Based on information indicating a departure point and a destination point received from a user, using the link data, a guidance route search unit that searches for a guidance route from the departure point to the destination point;
Route guidance means for performing route guidance based on the current position of the vehicle and the guidance route;
A parallel route search means for searching a parallel route that is a route leading to the destination through a parallel road connected to a branch point on the guidance route;
With reference to the link data and the current position of the vehicle, a switching button display means for displaying a switching button when the vehicle passes a branch point on the guidance route connected to the parallel road,
Switching instruction means for instructing the route guidance means when the switch button is operated, and for guiding the parallel route as a guidance route ;
The switching button display means includes
A predetermined time elapses after the vehicle passes the branch point on the guide route connected to the parallel road, or the vehicle passes the branch point on the guide route connected to the parallel road. If the recalculation of the guide route is executed the following, the navigation apparatus characterized that you cancel the display of the switching button. A navigation device mounted on a vehicle for searching and displaying a route to a set destination,
Link data storage means for storing link data which is information relating to a link indicating a road;
A current position calculating means for calculating a current position of the vehicle;
Based on information indicating a departure point and a destination point received from a user, using the link data, a guidance route search unit that searches for a guidance route from the departure point to the destination point;
Route guidance means for performing route guidance based on the current position of the vehicle and the guidance route;
A parallel route search means for searching a parallel route that is a route leading to the destination through a parallel road connected to a branch point on the guidance route;
With reference to the link data and the current position of the vehicle, a switching button display means for displaying a switching button when the vehicle passes a branch point on the guidance route connected to the parallel road,
Switching instruction means for instructing the route guidance means when the switch button is operated, and for guiding the parallel route as a guidance route ;
The switching button display means includes
The vehicle travels a predetermined distance after passing the branch point on the guidance route connected to the parallel road, or the branch on the guidance route where the vehicle is connected to the parallel road If the recalculation of the guide route is executed after passing through the point, the navigation apparatus characterized that you cancel the display of the switching button.

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