JP5747796B2 - Navigation device, navigation method and program - Google Patents

Description

  The present invention relates to a navigation device, a navigation method, and a program for guiding a route.

Conventionally, various techniques for detecting a current location by GPS positioning and guiding a route have been proposed.
For example, a signal from a GPS satellite is received, the current position is measured, the measured current position is displayed on a screen together with a map, a route to a destination is set and guidance is provided for each predetermined point. When the signal from the satellite cannot be received, if the current position is on the guide route, the current position is displayed so as to move on the guide route at a predetermined speed, and guidance is notified according to the current position. There is a navigation device (see, for example, Patent Document 1).

JP 2001-272237 A

  However, in the navigation device described in Patent Document 1, the system is complicated because the current position is estimated and the follow-up display is performed on the guide route in a tunnel where a signal from a GPS satellite cannot be received. Also, because of the guidance based on the estimated current position, the guidance accuracy may be lowered.

  Therefore, the present invention has been made to solve the above-mentioned problems, and can reliably guide a branch point located near the exit of a GPS shielding section where GPS signals cannot be received with a simple configuration. An object is to provide a navigation device, a navigation method, and a program.

In order to achieve the above object, a navigation apparatus according to claim 1 includes a current position acquisition unit that acquires a current position by GPS positioning based on a received GPS signal, a map information acquisition unit that acquires map information, and a plurality of types of navigation. Distance for acquiring re-receiving distance information indicating the distance of the GPS re-receiving travel section that travels until the GPS positioning becomes possible again after leaving the GPS shielded section that cannot receive the GPS signal corresponding to each of the devices. an information acquisition unit, based on the map information, there are pre-Symbol G PS shielding section on the route to the destination, and, after exiting the GPS shielding section, the navigation obtained from the re-reception distance information Branch point judging means for judging whether or not there is a branch point in the GPS re-receiving travel section corresponding to the model of the device ; The GPS shielded section exists on the route at, and after exiting the GPS shielded section, a branch point in the GPS re-receiving travel section corresponding to the model of the navigation device acquired from the re-receiving distance information If it is determined that there is a guidance output point setting means for setting a guidance information output point for outputting the guidance information of the branch point on the near side on the route from the point entering the GPS shielding section, Guidance information output means for outputting guidance information of the branch point when the current position reaches the guidance information output point.

Further, the navigation device according to claim 2 is the navigation device according to claim 1 , wherein predetermined guidance information output for outputting the guidance information of the branch point that is predetermined before the branch point on the route is provided. If the default guidance information output point exists in the GPS shielding section, the guidance output point setting means enters the GPS shielding section. The guidance information output point is set on the near side of the route by a predetermined distance from the point to be performed, and the guidance information output unit is configured to set the branch point at the predetermined guidance information output point in the GPS shielding section. The output of the guidance information is stopped.

Further, the navigation device according to claim 3 is the navigation device according to claim 2 , wherein the predetermined guidance information output point is located on the near side on the route from the point entering the GPS shielding section. The guide output point setting means sets the default guide information output point as the guide information output point.

Further, the navigation device according to claim 4 is the navigation device according to claim 2 , wherein the default guide point information includes a plurality of default guide information output points, and the GPS among the plurality of default guide information output points. If there is a default guidance information output point located on the near side of the route with respect to the point entering the shielding section, the guidance output point setting means is on the route more than the point entering the GPS shielding section. A guidance information output point located immediately before the front side is set as the guidance information output point, and the guidance information output means outputs guidance information at the branch point at the guidance information output point located within the GPS shielding section. It is characterized by canceling.

According to a fifth aspect of the present invention, a navigation method according to claim 5 is provided for each of a current position acquisition unit that acquires a current position by GPS positioning based on a received GPS signal, a map information acquisition unit that acquires map information, and a plurality of types of navigation devices. Distance information acquisition means for acquiring re-receiving distance information indicating a distance of a GPS re-receiving travel section that travels until the GPS positioning is enabled again after leaving the corresponding GPS shielding section that cannot receive the GPS signal; The current position acquisition step for acquiring the current position via the current position acquisition means, and the re-read corresponding to each of the plurality of types of navigation devices via the distance information acquisition means. a distance information acquisition step of acquiring reception distance information, based on the map information acquired via the map information obtaining means The GPS shielding section is present on the route to the destination, and, said after exiting the GPS shielding section, the GPS corresponding from the acquired again received distance information by the distance information acquisition process to the model of the navigation apparatus A branch point determination step for determining whether or not there is a branch point in the re-receiving travel section, and the GPS blocking section exists on the route to the destination in the branch point determination step, and the GPS blocking section If it is determined that there is a branch point in the GPS re-receiving travel section corresponding to the model of the navigation device acquired from the re-receiving distance information after exiting The guidance output point setting step for setting the guidance information output point for outputting the guidance information of the branch point on the near side on the route, and the current position acquired in the current position acquisition step are the plan. When it reaches the guidance information output point set in the output point setting step, comprising the, and guidance information output step of outputting the guidance information of the branch point.

Furthermore, the program according to claim 6 corresponds to each of a current position acquisition unit that acquires a current position by GPS positioning based on a received GPS signal, a map information acquisition unit that acquires map information, and a plurality of types of navigation devices. Distance information acquisition means for acquiring re-receiving distance information indicating the distance of the GPS re-receiving travel section that travels until the GPS positioning is enabled again after leaving the GPS shielded section that cannot receive the GPS signal; A current position acquisition step for acquiring a current position via the current position acquisition means, and the re-receiving distance information corresponding to each of the plurality of types of navigation devices via the distance information acquisition means. a distance information acquisition step of acquiring, based on the map information acquired via the map information acquiring unit, the purpose Chima Route the GPS shielding section is present on the, and, he said after exiting the GPS shielding section, the distance information obtained model corresponding to the GPS received again running of the re-reception distance information from the navigation apparatus at the acquisition step A branch point determination step for determining whether or not there is a branch point in the section, and the GPS block section exists on the route to the destination in the branch point determination step, and the GPS block section is exited. Thereafter, when it is determined that there is a branch point in the GPS re-receiving travel section corresponding to the model of the navigation device acquired from the re-receiving distance information , A guidance output point setting step for setting a guidance information output point for outputting the guidance information of the branch point on the front side of the current point, and the current position acquired in the current position acquisition step is the guidance output point. When it reaches the guidance information output point set at a constant step, a program for executing a guidance information output step of outputting the guidance information of the branch point.

In the navigation device according to claim 1, the navigation method according to claim 5 , and the program according to claim 6 , after leaving a GPS shielding section (for example, a tunnel, under an overpass or a dense section of a high-rise building). Even if there is a branch point in the GPS re-receiving travel section that travels until GPS positioning becomes possible again, that is, even if there is a branch point in the vicinity of leaving the GPS shield section, before entering the GPS shield section In addition, at the guidance information output point, guidance information such as the traveling direction at this branch point can be reliably output with a simple configuration. Therefore, even if there is a branch point near the exit of the GPS shielded section, the user can surely know the traveling direction at the branch point before entering the GPS shielded section, and enters the GPS shielded section. Before changing the lane, you can make appropriate changes.

Further, it is possible to obtain the distance of those the navigation device GPS received again travel section corresponding to the model, it is possible to obtain the distance of more accurate GPS received again traveling section. Then, after leaving the GPS shielding section on the route to the destination, it can be more accurately determined whether or not there is a branch point in the GPS re-receiving travel section.

Further, in the navigation device according to claim 2, when a predetermined default guidance information output point for outputting the guidance information for the branch point exists in the GPS shielding section, it is more than the point entering the GPS shielding section. Guidance information of the branch point can be output at a guidance information output point set on the near side by a predetermined distance. Moreover, at the predetermined guidance information output point in the GPS shielding section, the output of the guidance information at the branch point can be stopped, and the processing load can be reduced.

  Therefore, even if there is a branching point near the exit of the GPS shielding section (for example, a tunnel, under an overpass, or a dense section of a high-rise building), the user must enter the GPS shielding section before entering the GPS shielding section. It is possible to reliably know the traveling direction at a branch point near the exit of the vehicle, and appropriately change the lane before entering the GPS shielding section.

In the navigation device according to claim 3 , when the default guidance information output point is located on the near side of the GPS shielding section, the guidance information such as the traveling direction of the branch point is surely received at the default guidance information output point. Can be output. Therefore, even if there is a branch point near the exit of the GPS shielded section (for example, a tunnel, under an overpass, or a dense section of a high-rise building), the user can surely know the traveling direction at the branch point. It is possible to change the lane appropriately before entering the GPS shielding section.

Further, in the navigation device according to claim 4 , guidance such as a traveling direction of a branching point at a predetermined guidance information output point located immediately before a point entering the GPS shielding section among a plurality of predetermined guidance information output points. Information can be output. Further, since the output of the guidance information is stopped at the predetermined guidance information output point in the GPS shielding section, the processing load can be reduced. Therefore, even if there is a branch point near the exit of the GPS shielded section (for example, a tunnel, under an overpass, or a dense section of a high-rise building), the user can surely know the traveling direction at the branch point. It is possible to change the lane appropriately before entering the GPS shielding section.

It is a block diagram which shows an example of a structure of the navigation apparatus concerning a present Example. It is a figure which shows an example of the re-reception distance information which comprises navigation AP. It is a figure which shows an example of the guidance distance information which comprises navigation AP. It is a main flowchart which shows the "branch point guidance process" which guides the branch point near a tunnel exit which a navigation apparatus performs. 5 is a sub-flowchart showing a sub-process of “branch point guide process 1” in FIG. 4. 5 is a sub-flowchart showing a sub-process of “branch point guide process 2” in FIG. 4. 5 is a sub-flowchart showing a sub-process of “branch point guide process 3” in FIG. 4. It is a figure which shows an example of the guidance information output point of the branch point near the tunnel exit in an intercity highway. It is a figure which shows an example of a branch point guidance screen. It is a figure which shows an example of the guidance information output point of the branch point near the tunnel exit in a city highway and a toll road. It is a figure which shows an example of the guidance information output point of the branch point near the tunnel exit in a general road. It is a flowchart which shows the "navigation setting process" which sets the automatic display of an illustration enlarged view which a navigation apparatus performs. It is a figure which shows an example of a navigation detailed setting screen.

  Hereinafter, a navigation device, a navigation method, and a program according to an embodiment of the present invention will be described in detail with reference to the drawings based on an embodiment.

[Schematic configuration of navigation device]
First, a schematic configuration of the navigation device according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a block diagram showing a navigation device 1 according to the present embodiment.

  As shown in FIG. 1, the navigation device 1 according to the present embodiment is configured by a mobile information terminal such as a mobile phone, a smartphone, or a PDA (Personal Digital Assistant), and a GPS 11 that detects a current position and the like, A storage unit 12 in which an application is stored, a control unit 13 that performs various arithmetic processes based on input information, an operation unit 14 that receives operations from an operator, and information such as a map for the operator And a display unit 15 for displaying operation buttons and the like, a voice input / output unit 16 for inputting / outputting sound such as a microphone and a speaker, a communication unit 17 for performing communication via a cellular phone network, and the screen of the display unit 15 The touch panel 18 is mounted.

  Hereinafter, each component constituting the navigation device 1 will be described. The GPS 11 performs GPS positioning using a GPS signal received from a GPS satellite, and detects a current position (for example, latitude and longitude). It is possible.

  The storage unit 12 includes a hard disk, flash memory, SRAM (Static Random Access Memory), and the like, and includes a navigation application (navigation AP) 25, a communication unit 17, an operation unit 14, a touch panel 18, and a voice input / output unit 16. The mobile phone application (mobile phone AP) 26 that causes the navigation device 1 to function as a mobile phone using the mobile phone, and other applications that allow the navigation device 1 to function as an electronic book or a game machine using the operation unit 14 or the touch panel 18 ( Other AP) 27 and the like, and various data are stored.

  The navigation AP 25 is a program for causing the navigation device 1 to function as a navigation device for searching for a route to a destination, route display guidance, voice guidance, and the like, navigation map information 31 used for travel guidance and route search, which will be described later. Re-receiving distance information 32 (see FIG. 2) relating to the distance traveled before GPS positioning can be performed again, guidance distance information 33 relating to guidance points for performing guidance for guidance and voice guidance, etc. 3) and the like.

  Further, the navigation AP 25 has a “branch point guidance process” (see FIG. 4) program for guiding a branch point near the tunnel exit when there is a tunnel (GPS shielding section) on a route to a destination described later. Stored. Further, in the navigation AP 25, a “navigation detailed setting process” (see FIG. 12) for setting whether or not to automatically display an enlarged illustration showing the advancing direction of the branch point on the route on the display unit 15 described later. Stores programs, etc.

  Here, the navigation map information 31 includes various information necessary for route guidance and map display. For example, new road information for identifying each new road, map display data for displaying a map, Consists of intersection data related to intersections, node data related to node points, link data related to roads (links), facility data related to POIs (Points of Interest) such as stores and tunnels that are a type of facility, search data for searching points, etc. Has been. The contents of the navigation map information 31 are updated by downloading update information distributed from an information distribution center (not shown) via the communication unit 17.

  The link data includes a link ID for specifying a link for each link constituting the road, a link length indicating the link length, a travel time, and a coordinate position of the start point and end point of the link (for example, latitude and longitude). ), Data indicating the width of the road to which the link belongs, the number of lanes of the road, etc., in relation to the road type, in addition to general roads such as national roads, prefectural roads, narrow streets, etc. Data representing city expressways, general toll roads, toll bridges, etc. are recorded respectively. In addition, with regard to intercity expressways, city expressways, general toll roads, and toll bridges, data relating to the entrance and exit roads (rampways) of each road, toll gates (interchanges), and charges for each travel section are recorded. The

  As shown in FIG. 2, the re-receiving distance information 32 includes “model name” and “GPS re-receiving distance”. The “model name” stores the model name of a mobile information terminal such as a mobile phone, a smartphone, or a PDA. In addition, in the “GPS re-receiving distance”, the model of each portable information terminal has left a GPS shielding section (for example, a tunnel, under an overpass, a dense section of a high-rise building, etc.) that cannot receive a GPS signal. Thereafter, a distance obtained by adding a predetermined margin distance (for example, a margin distance of 50 m) to the distance traveled until the GPS signal is received again by receiving the GPS signal (the distance of the GPS re-receiving travel section). ) Is stored. The content of the re-receiving distance information 32 is updated by downloading update information distributed from an information distribution center (not shown) via the communication unit 17.

  As shown in FIG. 3, the guide distance information 33 includes “road type”, “default guide point”, and “distance from the branch point”. This "road type" excludes "intercity expressways" representing intercity expressways, "city expressways / toll roads" representing city expressways, general toll roads, toll bridges, and toll roads. “General roads” representing one-digit or two-digit national roads, three-digit or more national roads, main local roads, prefectural roads, municipal roads, and the like are stored.

  In addition, the “predetermined guide point” includes a branch guide point that outputs display guidance and voice guidance such as the direction of travel of the branch point, and the branch point side from the branch guide point that is located closest to the route from the branch point. Are stored in order. For example, in the “default guidance point” corresponding to the “intercity expressway”, display guidance and voice guidance such as the traveling direction of the branch point located on the nearest side of the route from the branch point are output and “first” is output. "Branch guide point", followed by "second branch guide point" that outputs display guidance and voice guidance such as the direction of travel at the branch point, and finally outputs display guidance and voice guidance such as the direction of travel at the branch point “Third branch guide point” is stored.

  The “distance from the branch point” includes the distance from each branch guide point stored in the “predetermined guide point” to the branch point, that is, display guidance such as the traveling direction from the branch point to the branch point, and voice guidance. The distance to the branch guide point that outputs is stored. For example, “distance from branch point” corresponding to “intercity expressway” stores “2 km before” representing 2 km before the route from the branch point corresponding to “first branch guide point”. ing. That is, when the road type is “intercity highway”, the “first branch guide point” is set in advance to a point 2 km before the branch point on the route. The content of the guide distance information 33 is updated by downloading update information distributed from an information distribution center (not shown) via the communication unit 17.

  As shown in FIG. 1, the control unit 13 constituting the navigation device 1 includes an arithmetic device that controls the entire navigation device 1, a CPU 41 as the control device, and a working memory when the CPU 41 performs various arithmetic processes. RAM 42 that stores route data when a route is searched, a ROM 43 that stores a control program at startup, a program that activates each application, a model name of the navigation device 1, and the like Internal storage device, timer 45 for measuring time, and the like.

Further, the GPS 11, the storage unit 12, the operation unit 14, the display unit 15, the voice input / output unit 16, the communication unit 17, and the touch panel 18 are electrically connected to the control unit 13.
The operation unit 14 is operated when the navigation device 1 is turned on / off, volume adjustment, and the like, and includes a plurality of operation switches. Then, the control unit 13 performs control to execute various corresponding operations based on switch signals output by pressing the switches.

  Further, the display unit 15 is configured by a liquid crystal display or the like, and when the navigation AP 25 is activated, the currently traveling map information (see FIG. 9 and the like), the map information around the destination, the operation guidance, the operation menu, The route from the current location to the destination, guidance information along the route, etc. are displayed. Further, when the mobile phone AP 26 is activated, a numeric keypad for inputting a telephone number or the like is displayed. Further, when the other AP 27 is activated, news, weather forecast, time, mail, TV program, etc. are displayed.

  Further, when the navigation AP 25 is activated, the voice input / output unit 16 outputs voice guidance or the like for guiding traveling along the route based on an instruction from the control unit 13. Here, as the voice guidance to be guided, for example, “700m ahead, turn right at XX intersection”, and the like.

  The touch panel 18 is a transparent panel-like touch switch mounted on the display screen of the display unit 15, and inputs various instruction commands by pressing buttons or a map displayed on the screen of the display unit 15. In addition, when a finger is pressed on the display screen and dragged, the moving direction and moving speed of each finger can be detected, or the number of fingers pressed on the display screen can be detected. . Note that the touch panel 18 may be configured by an optical sensor liquid crystal method or the like that directly presses the screen of the display unit 15.

[Branch point guidance processing]
Next, the CPU 41 of the navigation device 1 configured as described above is a process executed when the navigation AP 25 is activated, and there is a tunnel which is an example of a GPS shielding section on the route to the destination. In this case, “branch point guidance processing” for guiding a branch point near the tunnel exit will be described with reference to FIGS. The program shown in the flowchart in FIG. 4 is, for example, about a point about 700 meters before the point entering the tunnel on a highway or toll road, about a point on the route from a point entering the tunnel on a general road. It is executed by the CPU 41 at a point 200 m before.

  As shown in FIG. 4, first, in step (hereinafter abbreviated as S) 11, the CPU 41 reads the model name of the navigation device 1 from the ROM 43. Then, the CPU 41 reads “GPS re-reception distance” corresponding to the model name of the navigation device 1 from the re-reception distance information 32 of the navigation AP 25, and after retiring from the tunnel, re-reception that enables GPS positioning again. The travel distance is stored in the RAM 42.

  For example, when the model name of the navigation device 1 is “A2”, the CPU 41 reads the GPS re-receiving distance “150 m” corresponding to the model name “A2” from the re-receiving distance information 32, and this “150 m”. After leaving the tunnel, the re-receiving travel distance that enables GPS positioning is stored in the RAM 42 again.

  In S12, the CPU 41 calculates the distance from the exit of the tunnel ahead in the traveling direction (the point where the tunnel exits) to a branch point such as an interchange or an intersection from the node data or link data of the navigation map information 31, and the RAM 42 To remember. Note that the CPU 41 calculates the distance from the tunnel exit to the branch point such as an interchange or intersection from the node data or link data of the navigation map information 31 and stores it in the RAM 42 when searching for a route to the destination or when rerouting. You may make it do.

  Subsequently, in S13, the CPU 41 reads the re-receiving travel distance and the distance from the tunnel exit to the branch point from the RAM 42, and determines whether or not the distance from the tunnel exit to the branch point is equal to or less than the re-receive travel distance. Execute. And when it determines with the distance from a tunnel exit to a branch point being longer than the re-reception travel distance (S13: NO), CPU41 transfers to the process of S14.

  In S <b> 14, the CPU 41 acquires the current position by the GPS 11, and acquires the road type of the road (link) currently running from the navigation map information 31. Then, the CPU 41 reads the distance from the branch point of each “default guide point” corresponding to the road type of the currently traveling road from the guide distance information 33, and if there is a default guide point in the tunnel, Cancels the voice guidance of the branch point and the enlarged display of the branch point at the predetermined guidance point.

  In S15, after leaving the tunnel, the CPU 41 receives the GPS signal again, and when GPS positioning becomes possible again, the CPU 41 provides voice guidance for an interchange or an intersection ahead of the traveling direction on the route. At the same time, an enlarged view of the branch point is displayed on the display unit 15, and then the process is terminated.

  On the other hand, when it is determined that the distance from the tunnel exit to the branch point is equal to or less than the re-receiving travel distance (S13: YES), the CPU 41 proceeds to the process of S16. In S <b> 16, the CPU 41 obtains the current position by the GPS 11, obtains the road type of the road (link) that is currently running from the navigation map information 31, and determines whether the currently running road is an intercity highway. A determination process for determining And when it determines with the road currently drive | working being an intercity highway (S16: YES), CPU41 transfers to the process of S17. In S <b> 17, the CPU 41 executes a sub-process (see FIG. 5) of “branch point guide process 1” described later, and then ends the process.

  On the other hand, if it is determined that the road that is currently traveling is not an intercity highway (S16: NO), the CPU 41 proceeds to the process of S18. In S <b> 18, the CPU 41 executes a determination process for determining whether or not the currently traveling road is an urban highway, a general toll road, a toll bridge or the like (hereinafter referred to as “toll road”). And when it determines with the road currently drive | working being a city highway or a toll road (S18: YES), CPU41 transfers to the process of S19. In S <b> 19, the CPU 41 executes a sub-process (see FIG. 6) of “Branch point guidance process 2” described later, and then ends the process.

  On the other hand, if it is determined that the road that is currently traveling is not an urban expressway or a toll road, that is, if it is determined that the currently traveling road is a general road (S18: NO), the CPU 41 , The process proceeds to S20. In S <b> 20, the CPU 41 executes a sub-process (see FIG. 7) of “Branch point guidance process 3” described later, and then ends the process.

[Branch guide process 1]
Next, sub processing of “branch point guidance processing 1” executed by the CPU 41 in S17 will be described based on FIG. 5, FIG. 8, and FIG.
As shown in FIG. 5, first, in S <b> 111, the CPU 41 determines “first branch guide point” among “predetermined guide points” whose “road type” corresponds to the intercity highway from the guide distance information 33 of the navigation AP 25. “2 km before” which is the “distance from the branch point” corresponding to is read, and “2 km” is stored in the RAM 42 as the distance from the branch point to the first branch guide point.

  Further, the CPU 41 calculates the distance from the entrance of the tunnel ahead in the traveling direction (the point entering the tunnel) to the branch point such as an interchange ahead in the traveling direction from the node data or link data of the navigation map information 31, and the like. To remember. Subsequently, the CPU 41 reads the distance “2 km” from the branch point to the first branch guide point from the RAM 42, and the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is the first branch guide from the branch point. A determination process is executed to determine whether the distance to the point is “2 km” or more, that is, whether the entrance of the tunnel is located on the near side of the route from the first branch guide point.

  If it is determined that the tunnel entrance is located on the near side of the route from the first branch guide point (S111: YES), the CPU 41 determines that the first branch guide point to the third branch guide point are all in the tunnel. It moves to the process of S112. In S112, the CPU 41 sets a guide information output point for outputting guide information such as a traveling direction of a branch point such as the interchange at a point about 500 m before the tunnel entrance.

  Then, the CPU 41 detects the current position by the GPS 11, and when the current position has reached the guidance information output point, that is, has reached a point about 500m before the tunnel entrance (point entering the tunnel). Sometimes, the direction of travel of the branch point of the interchange or the like is voice-guided through the voice input / output unit 16.

  For example, as shown in FIG. 8, the GPS re-receiving travel distance acquired in S11 of the navigation device 1 is “150 m”, and the interchange branch point 62 of the intercity highway 60 is 100 m from the exit of the tunnel 66. The first branch guide point 63, the second branch guide point 64, and the third branch guide point 65 of the “predetermined guide point” that guides the branch point 62 are all located in the tunnel 66. In this case, the CPU 41 sets a guidance information output point 68 at a point 500 m in front of the route 67 from the entrance (point entering the tunnel 66) 61 of the tunnel 66.

  Then, when the current position 69 detected by the GPS 11 reaches the guidance information output point 68, the CPU 41, through the voice input / output unit 16, reads “Take the tunnel and turn left at the XX interchange”. To do.

  Subsequently, as shown in FIG. 5, in S113, the CPU 41 reads an enlarged view flag from the RAM 42, and executes a determination process for determining whether or not the enlarged view flag is set to “ON”. If it is determined that the enlarged view flag is set to “OFF” (S113: NO), the CPU 41 proceeds to the process of S115 described later. The enlarged view flag is set to “ON” and stored in the RAM 42 when the navigation AP 25 is activated. Further, as will be described later, the enlarged view flag can be turned on and off on the navigation detailed setting screen (see FIG. 12).

  On the other hand, if it is determined that the enlarged view flag is set to “ON” (S113: YES), the CPU 41 proceeds to the process of S114. In S <b> 114, the CPU 41 displays a map on a substantially left half of the display screen of the display unit 15 and displays a current position mark indicating the route and the current position. At the same time, the CPU 41 displays an enlarged illustration showing the entrance of the tunnel on the substantially right half of the display screen of the display unit 15 and displays the traveling direction at a branch point such as an interchange located near the exit of the tunnel. The displayed arrow is enlarged and displayed on the enlarged illustration.

  For example, as shown in FIG. 9, the CPU 41 displays a map 71 on the substantially left half of the display unit 15, displays a route 67, and displays a current position mark 72 representing the current position 69. At the same time, the CPU 41 displays an enlarged illustration 73 showing the entrance 61 of the tunnel 66 on the substantially right half of the display screen of the display unit 15, and a branch point 62 such as an interchange located near the exit of the tunnel 66. An arrow 75 indicating the traveling direction is enlarged and displayed on the enlarged illustration 73.

  As shown in FIG. 5, in S <b> 115, the CPU 41 determines each branch located in the tunnel among the first branch guide point to the third branch guide point of the “default guide point” stored in the guide distance information 33. Stops outputting guidance information such as the direction of travel at a branch point such as an interchange located near the exit of the tunnel at the guidance point. That is, the CPU 41 is located near the exit of the tunnel at each branch guide point located in the tunnel among the first branch guide point to the third branch guide point of the “default guide point” stored in the guide distance information 33. Cancels voice guidance in the direction of travel at the branching point such as an interchange or a magnified illustration display.

  Subsequently, in S116, the CPU 41 executes determination processing for determining whether or not the vehicle has passed a branch point such as an interchange located near the exit of the tunnel. Specifically, the CPU 41 receives a GPS signal and executes a determination process for determining whether or not GPS positioning is possible. If it is determined that the vehicle does not pass through a branch point such as an interchange located near the exit of the tunnel, that is, if it is determined that GPS positioning is not possible (S116: NO), the CPU 41 again , S116 is executed.

  On the other hand, when it is determined that the vehicle has passed a branch point such as an interchange located near the exit of the tunnel, that is, when it is determined that GPS positioning is possible (S116: YES), the CPU 41 proceeds to the process of S117. To do. In S117, the CPU 41 finishes displaying the enlarged illustration showing the entrance of the tunnel displayed on the substantially right half of the display screen of the display unit 15, displays the map on the entire display screen, and displays the route and the current position. After the current position mark to be displayed is displayed, the sub-process is terminated, the process returns to the main flowchart, and the process is terminated.

  On the other hand, in S111, the CPU 41 determines that the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is shorter than the distance “2 km” from the branch point to the first branch guide point, that is, the first branch guide point. Is determined to be located on the near side of the route from the entrance of the tunnel (S111: NO), the CPU 41 proceeds to the process of S118.

  In S118, the CPU 41 determines “distance from the branch point” corresponding to the “second branch guide point” among the “predetermined guide points” whose “road type” corresponds to the intercity expressway from the guide distance information 33 of the navigation AP 25. "1 km before", and the "1 km" is stored in the RAM 42 as the distance from the branch point to the second branch guide point.

  Subsequently, the CPU 41 reads the distance “1 km” from the branch point to the second branch guide point from the RAM 42, and the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is the second branch guide from the branch point. A determination process is performed to determine whether or not the distance to the point is “1 km” or more, that is, whether or not the entrance of the tunnel is located on the near side of the route from the second branch guide point.

  If it is determined that the tunnel entrance is located on the near side of the route from the second branch guide point (S118: YES), the CPU 41 places the second branch guide point and the third branch guide point in the tunnel. It is determined that it is located, and the process proceeds to S119. In S119, the CPU 41 reads the distance “2 km” from the branch point to the first branch guide point again from the RAM 42, and sets the first branch guide point at a position 2 km before the branch point on the route. Then, the CPU 41 detects the current position by the GPS 11 and, after the current position reaches the first branch guidance point, provides voice guidance of the traveling direction of the branch point such as the interchange through the voice input / output unit 16. Then, the process proceeds to S113.

  On the other hand, the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is shorter than the distance “1 km” from the branch point to the second branch guide point, that is, the second branch guide point is shorter than the tunnel entrance. When it is determined that it is located on the near side on the route (S118: NO), the CPU 41 proceeds to the process of S120. In S120, the CPU 41 determines that the “distance from the branch point” corresponding to the “third branch guide point” among the “predetermined guide points” whose “road type” corresponds to the intercity expressway from the guide distance information 33 of the navigation AP 25. "500 m before", and the "500 m" is stored in the RAM 42 as the distance from the branch point to the third branch guide point.

  Subsequently, the CPU 41 reads the distance “500 m” from the branch point to the third branch guide point from the RAM 42, and the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is the third branch guide from the branch point. A determination process for determining whether or not the distance to the point is “500 m” or more, that is, whether or not the entrance of the tunnel is located on the near side of the route with respect to the third branch guide point is executed.

  If it is determined that the entrance of the tunnel is located on the near side of the route from the third branch guide point (S120: YES), the CPU 41 determines that the third branch guide point is located in the tunnel, The process proceeds to S121. In S121, the CPU 41 reads the distance “2 km” from the branch point to the first branch guide point from the RAM 42 again, and sets the first branch guide point at a position 2 km before the branch point on the route. Then, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the first branch guidance point, provides voice guidance of the traveling direction of the branch point such as the interchange via the voice input / output unit 16.

  Subsequently, in S122, the CPU 41 reads again the distance “1 km” from the branch point to the second branch guide point from the RAM 42, and sets the second branch guide point at a position 1 km before the branch point on the route. . Then, the CPU 41 detects the current position by the GPS 11 and, after the current position reaches the second branch guidance point, provides voice guidance of the traveling direction of the branch point such as the interchange through the voice input / output unit 16. Then, the process proceeds to S113.

  On the other hand, in S120, the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is shorter than the distance “500 m” from the branch point to the third branch guide point, that is, the third branch guide point is the tunnel point. If it is determined that it is located on the near side of the route from the entrance (S120: NO), the CPU 41 proceeds to the process of S123.

  In S123, the CPU 41 sets a first branch guidance point to a third branch guide point on a predetermined distance on the route from a branch point such as an interchange located near the tunnel exit. Then, the CPU 41 detects the current position by the GPS 11, and when the current position reaches each point of the first branch guide point to the third branch guide point, it outputs guidance such as the traveling direction of the branch point, The process proceeds to S116.

  Specifically, the CPU 41 reads again the distances “2 km”, “1 km”, and “500 m” from the branch point to the first branch guide point to the third branch guide point as the above-mentioned predetermined distance from the RAM 42 and branches. A first branch guidance point to a third branch guidance point are set at respective positions on the front side of 2 km, 1 km, and 500 m from the point. Then, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the first branch guidance point, provides voice guidance of the traveling direction of the branch point such as the interchange via the voice input / output unit 16.

  Subsequently, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the second branch guidance point, guides the traveling direction of the branch point such as the interchange via the voice input / output unit 16. . Then, the CPU 41 reads the enlarged map flag from the RAM 42. When the enlarged map flag is set to “ON”, the CPU 41 displays a map on the substantially left half of the display screen of the display unit 15 to display the route and the current position. The current position mark is displayed. At the same time, the CPU 41 displays an enlarged illustration showing the entrance of the tunnel on the substantially right half of the display screen of the display unit 15 and displays the traveling direction at a branch point such as an interchange located near the exit of the tunnel. The displayed arrow is enlarged and displayed on the enlarged illustration.

  Then, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the third branch guidance point, guides the traveling direction of the branch point such as the interchange via the voice input / output unit 16. Then, the CPU 41 reads the enlarged map flag from the RAM 42. When the enlarged map flag is set to “ON”, the CPU 41 displays a map on the substantially left half of the display screen of the display unit 15 to display the route and the current position. The current position mark is displayed.

  At the same time, the CPU 41 displays an enlarged illustration showing the entrance of the tunnel on the substantially right half of the display screen of the display unit 15 and displays the traveling direction at a branch point such as an interchange located near the exit of the tunnel. After the displayed arrow is enlarged and displayed on the enlarged illustration, the process proceeds to S116.

[Branch point guidance process 2]
Next, sub-processing of “branch point guidance processing 2” executed by the CPU 41 in S19 will be described with reference to FIGS.
As shown in FIG. 6, first, in S211, the CPU 41 determines, based on the guidance distance information 33 of the navigation AP 25, “first branch guidance” among “default guidance points” whose “road type” corresponds to a city highway / toll road. “1 km before”, which is the “distance from the branch point” corresponding to the “point”, is read, and the “1 km” is stored in the RAM 42 as the distance from the branch point to the first branch guide point.

  Further, the CPU 41 calculates the distance from the entrance of the tunnel ahead in the traveling direction (the point entering the tunnel) to the branch point such as an interchange ahead in the traveling direction from the node data or link data of the navigation map information 31, and the like. To remember. Subsequently, the CPU 41 reads the distance “1 km” from the branch point to the first branch guide point from the RAM 42, and the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is the first branch guide from the branch point. A determination process for determining whether or not the distance to the point is equal to or greater than “1 km”, that is, whether or not the entrance of the tunnel is located on the near side of the route from the first branch guide point is executed.

  If it is determined that the tunnel entrance is located on the near side of the route from the first branch guide point (S211: YES), the CPU 41 determines that the first branch guide point and the second branch guide point are all in the tunnel. It moves to the process of S212. In S212, the CPU 41 sets a guidance information output point for outputting guidance information such as a traveling direction of a branch point such as the interchange from a tunnel entrance to a point about 500 m ahead on the route.

  Then, the CPU 41 detects the current position by the GPS 11, and when the current position reaches the guidance information output point, that is, when it reaches a point about 500m before the tunnel entrance, the interchange etc. The direction of travel at the branch point is voice-guided through the voice input / output unit 16.

  For example, as shown in FIG. 10, the GPS re-receiving distance acquired in S <b> 11 of the navigation device 1 is “150 m”, and the interchange branch point 82 of the city highway 80 is a point 100 m from the exit of the tunnel 86. And the first branch guide point 83 and the second branch guide point 84 of the “predetermined guide point” for guiding the branch point 82 are all located within the tunnel 86, the CPU 41 A guidance information output point 88 is set at a point 500 m in front of the route 87 from the entrance (point entering the tunnel 86) 81.

  Then, when the current position 89 detected by the GPS 11 reaches the guidance information output point 88, the CPU 41, through the voice input / output unit 16, reads "Leave the tunnel and turn left at the XX interchange". To do.

  Subsequently, as shown in FIG. 6, in S213 to S217, after executing the processes of S113 to S117, the CPU 41 ends the sub-process, returns to the main flowchart, and ends the process.

  On the other hand, in S211, the CPU 41 determines that the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is shorter than the distance “1 km” from the branch point to the first branch guide point, that is, the first branch guide point. Is determined to be located on the near side of the route from the entrance of the tunnel (S211: NO), the CPU 41 proceeds to the process of S218.

  In S218, the CPU 41 determines, from the guidance distance information 33 of the navigation AP 25, the “road type” corresponding to the “second branch guide point” among the “predetermined guide points” corresponding to the urban highway / toll road. “500 m before”, which is the “distance”, is stored in the RAM 42 as the distance from the branch point to the second branch guide point.

  Subsequently, the CPU 41 reads the distance “500 m” from the branch point to the second branch guide point from the RAM 42, and the distance from the entrance of the tunnel to the branch point such as an interchange ahead in the traveling direction is the second branch guide from the branch point. A determination process is executed to determine whether or not the distance to the point is “500 m” or more, that is, whether or not the entrance of the tunnel is located on the near side of the route from the second branch guide point.

  When it is determined that the entrance of the tunnel is located on the near side of the route from the second branch guide point (S218: YES), the CPU 41 determines that the second branch guide point is located in the tunnel, The process proceeds to S219. In S219, the CPU 41 reads again the distance “1 km” from the branch point to the first branch guide point from the RAM 42, and sets the first branch guide point at a position 1 km before the branch point on the route. Then, the CPU 41 detects the current position by the GPS 11 and, after the current position reaches the first branch guidance point, provides voice guidance of the traveling direction of the branch point such as the interchange through the voice input / output unit 16. Then, the process proceeds to S213.

  On the other hand, the distance from the tunnel entrance to the branch point such as an interchange ahead in the traveling direction is shorter than the distance “500 m” from the branch point to the second branch guide point, that is, the second branch guide point is shorter than the tunnel entrance. When it is determined that it is located on the near side on the route (S218: NO), the CPU 41 proceeds to the process of S220.

  In S220, the CPU 41 sets a first branch guide point and a second branch guide point on the front side of the route from a branch point such as an interchange located near the tunnel exit. Then, the CPU 41 detects the current position by the GPS 11, and when the current position reaches each of the first branch guide point and the second branch guide point, it outputs guidance such as the traveling direction of the branch point, The process proceeds to S216.

  Specifically, the CPU 41 reads the distances “1 km” and “500 m” from the branch point to the first branch guide point and the second branch guide point again from the RAM 42, and 1 km and 500 m before the branch point on the route. A first branch guide point and a second branch guide point are set at each position on the side. Then, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the first branch guidance point, provides voice guidance of the traveling direction of the branch point such as the interchange via the voice input / output unit 16.

  Then, the CPU 41 reads the enlarged map flag from the RAM 42. When the enlarged map flag is set to “ON”, the CPU 41 displays a map on the substantially left half of the display screen of the display unit 15 to display the route and the current position. The current position mark is displayed. At the same time, the CPU 41 displays an enlarged illustration showing the entrance of the tunnel on the substantially right half of the display screen of the display unit 15 and displays the traveling direction at a branch point such as an interchange located near the exit of the tunnel. The displayed arrow is enlarged and displayed on the enlarged illustration.

  Subsequently, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the second branch guidance point, guides the traveling direction of the branch point such as the interchange via the voice input / output unit 16. . Then, the CPU 41 reads the enlarged map flag from the RAM 42. When the enlarged map flag is set to “ON”, the CPU 41 displays a map on the substantially left half of the display screen of the display unit 15 to display the route and the current position. The current position mark is displayed. At the same time, the CPU 41 displays an enlarged illustration showing the entrance of the tunnel on the substantially right half of the display screen of the display unit 15 and displays the traveling direction at a branch point such as an interchange located near the exit of the tunnel. After the displayed arrow is enlarged and displayed on the enlarged illustration, the process proceeds to S216.

[Branch guide process 3]
Next, sub-processing of “branch point guidance processing 3” executed by the CPU 41 in S20 will be described with reference to FIGS.
As shown in FIG. 7, first, in S <b> 311, the CPU 41 corresponds to “first branch guide point” among “default guide points” whose “road type” corresponds to a general road from the guide distance information 33 of the navigation AP 25. “700 m before”, which is the “distance from the branch point”, is read, and the “700 m” is stored in the RAM 42 as the distance from the branch point to the first branch guide point.

  Further, the CPU 41 calculates the distance from the entrance of the tunnel ahead of the traveling direction (the point entering the tunnel) to the branching point such as the intersection ahead of the traveling direction from the node data or link data of the navigation map information 31, and the RAM 42. To remember. Subsequently, the CPU 41 reads the distance “700 m” from the branch point to the first branch guide point from the RAM 42, and the distance from the entrance of the tunnel to the branch point such as an intersection ahead in the traveling direction is the first branch guide from the branch point. A determination process for determining whether or not the distance to the point is “700 m” or more, that is, whether or not the entrance of the tunnel is located on the near side of the route from the first branch guide point is executed.

  If it is determined that the entrance of the tunnel is located on the near side of the route from the first branch guide point (S311: YES), the CPU 41 determines that all of the first branch guide point to the third branch guide point are in the tunnel. It moves to the process of S312. In S <b> 312, the CPU 41 sets a guidance information output point for outputting guidance information such as a traveling direction of a branch point such as the intersection at a point about 100 m before the tunnel entrance.

  Then, the CPU 41 detects the current position by the GPS 11, and when the current position reaches the guidance information output point, that is, when it reaches a point about 100 m before the tunnel entrance, the intersection etc. The direction of travel at the branch point is voice-guided through the voice input / output unit 16.

  For example, as shown in FIG. 11, the GPS re-receiving distance acquired in S <b> 11 of the navigation device 1 is “150 m” and the branch point 92 at the intersection of the general road 90 is 70 m from the exit of the tunnel 96. When the first branch guide point 93, the second branch guide point 94, and the third branch guide point 95 of the “predetermined guide point” that guides the branch point 92 are all located in the tunnel 96. The CPU 41 sets a guidance information output point 98 at a point on the near side 100 m on the route 97 from the entrance (point entering the tunnel 96) 91 of the tunnel 96.

  Then, when the current position 99 detected by the GPS 11 reaches the guidance information output point 98, the CPU 41, through the voice input / output unit 16, reads “Leave the tunnel and turn left at the XX intersection”. To do.

  Subsequently, as shown in FIG. 7, in S313 to S317, after executing the processes of S113 to S117, the CPU 41 ends the sub process, returns to the main flowchart, and ends the process.

  On the other hand, in S311, the CPU 41 determines that the distance from the tunnel entrance to the branch point such as an intersection ahead in the traveling direction is shorter than the distance “700 m” from the branch point to the first branch guide point, that is, the first branch guide point. If it is determined that is located on the near side of the route from the entrance of the tunnel (S311: NO), the CPU 41 proceeds to the process of S318.

  In S318, the CPU 41 determines the “distance from the branch point” corresponding to the “second branch guide point” among the “predetermined guide points” whose “road type” corresponds to the general road from the guide distance information 33 of the navigation AP 25. A certain “300 m before” is read out, and the “300 m” is stored in the RAM 42 as the distance from the branch point to the second branch guide point.

  Subsequently, the CPU 41 reads the distance “300 m” from the branch point to the second branch guide point from the RAM 42, and the distance from the entrance of the tunnel to the branch point such as an intersection ahead in the traveling direction is the second branch guide from the branch point. A determination process is executed to determine whether or not the distance to the point is “300 m” or more, that is, whether or not the entrance of the tunnel is located on the near side of the route from the second branch guide point.

  If it is determined that the entrance of the tunnel is positioned on the near side of the route from the second branch guide point (S318: YES), the CPU 41 determines that the second branch guide point and the third branch guide point are in the tunnel. It is determined that it is located, and the process proceeds to S319. In S319, the CPU 41 reads again the distance “700 m” from the branch point to the first branch guide point from the RAM 42, and sets the first branch guide point at a position 700 m before the branch point on the route. Then, the CPU 41 detects the current position by the GPS 11 and, after the current position reaches the first branch guidance point, provides voice guidance of the traveling direction of the branch point such as the intersection via the voice input / output unit 16. Then, the process proceeds to S313.

  On the other hand, the distance from the tunnel entrance to the branch point such as an intersection ahead in the traveling direction is shorter than the distance “300 m” from the branch point to the second branch guide point, that is, the second branch guide point is shorter than the tunnel entrance. When it is determined that it is located on the near side on the route (S318: NO), the CPU 41 proceeds to the process of S320. In S320, the CPU 41 uses the “distance from the branch point” corresponding to the “third branch guide point” among the “predetermined guide points” whose “road type” corresponds to the general road from the guide distance information 33 of the navigation AP 25. A certain “100 m before” is read, and the “100 m” is stored in the RAM 42 as the distance from the branch point to the third branch guide point.

  Subsequently, the CPU 41 reads the distance “100 m” from the branch point to the third branch guide point from the RAM 42, and the distance from the entrance of the tunnel to the branch point such as an intersection ahead in the traveling direction is the third branch guide from the branch point. A determination process for determining whether or not the distance to the point is “100 m” or more, that is, whether or not the entrance of the tunnel is located on the near side of the route with respect to the third branch guide point is executed.

  If it is determined that the entrance of the tunnel is located on the near side of the route from the third branch guide point (S320: YES), the CPU 41 determines that the third branch guide point is located in the tunnel, The process proceeds to S321. In S321, the CPU 41 reads the distance “700 m” from the branch point to the first branch guide point from the RAM 42 again, and sets the first branch guide point at a position 700 m before the branch point on the route. Then, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the first branch guidance point, guides the traveling direction of the branch point such as the intersection via the voice input / output unit 16.

  Subsequently, in S322, the CPU 41 reads again the distance “300 m” from the branch point to the second branch guide point from the RAM 42, and sets the second branch guide point at a position 300 m before the branch point on the route. . Then, the CPU 41 detects the current position by the GPS 11 and, after the current position reaches the second branch guidance point, provides voice guidance of the traveling direction of the branch point such as the intersection via the voice input / output unit 16. Then, the process proceeds to S313.

  On the other hand, in S320, the distance from the entrance of the tunnel to the branch point such as an intersection ahead in the traveling direction is shorter than the distance “100 m” from the branch point to the third branch guide point, that is, the third branch guide point is the tunnel point. If it is determined that it is located on the near side of the route from the entrance (S320: NO), the CPU 41 proceeds to the process of S323.

  In S323, the CPU 41 sets a first branch guidance point to a third branch guide point on the near side of the route from a branch point such as an intersection located near the tunnel exit. Then, the CPU 41 detects the current position by the GPS 11, and when the current position reaches each point of the first branch guide point to the third branch guide point, it outputs guidance such as the traveling direction of the branch point, The process proceeds to S316.

  Specifically, the CPU 41 reads the distances “700 m”, “300 m”, and “100 m” from the branch point to the first branch guide point to the third branch guide point again from the RAM 42, and on the route from the branch point. A first branch guidance point to a third branch guide point are respectively set at positions 700 m, 300 m, and 100 m in front. Then, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the first branch guidance point, guides the traveling direction of the branch point such as the intersection via the voice input / output unit 16.

  Subsequently, the CPU 41 detects the current position by the GPS 11 and, when the current position reaches the second branch guidance point, guides the traveling direction of the branch point such as the intersection via the voice input / output unit 16. . Then, the CPU 41 reads the enlarged map flag from the RAM 42. When the enlarged map flag is set to “ON”, the CPU 41 displays a map on the substantially left half of the display screen of the display unit 15 to display the route and the current position. The current position mark is displayed. At the same time, the CPU 41 displays an enlarged illustration showing the entrance of the tunnel on the substantially right half of the display screen of the display unit 15 and displays the traveling direction at a branch point such as an intersection located near the exit of the tunnel. The displayed arrow is enlarged and displayed on the enlarged illustration.

  Then, the CPU 41 detects the current position by the GPS 11, and when the current position reaches the third branch guidance point, voice guidance is provided via the voice input / output unit 16 regarding the traveling direction of the branch point such as the intersection. Then, the CPU 41 reads the enlarged map flag from the RAM 42. When the enlarged map flag is set to “ON”, the CPU 41 displays a map on the substantially left half of the display screen of the display unit 15 to display the route and the current position. The current position mark is displayed.

  At the same time, the CPU 41 displays an enlarged illustration showing the entrance of the tunnel on the substantially right half of the display screen of the display unit 15 and displays the traveling direction at a branch point such as an intersection located near the exit of the tunnel. After the displayed arrow is enlarged and displayed on the enlarged illustration, the process proceeds to S116.

[Navigation setting process]
Next, the CPU 41 of the navigation device 1 is a process executed when the navigation AP 25 is activated, and sets the enlarged map flag on / off. That is, in the above “branch point guidance process”, A “navigation setting process” for setting whether to automatically display the enlarged illustration will be described with reference to FIGS. Note that the program shown in the flowchart of FIG. 12 is executed by the CPU 41 when the navigation setting button displayed on the display unit 15 is pressed.

  As shown in FIG. 12, in S411, the CPU 41 displays a navigation detail setting screen on the display unit 15. Specifically, the CPU 41 displays a list of setting items such as “automatic illustration enlarged view display” and “automatic display of high-speed branch schematic diagram” on the substantially left half of the display screen of the display unit 15. Further, on the right side of each setting item, a “Yes” button indicating that the processing of the setting item is automatically performed and a “No” button indicating that the setting item is not processed are displayed.

  Subsequently, in S412, the CPU 41 determines whether or not the “illustration enlarged map automatic display” item displayed on the navigation detailed setting screen via the touch panel 18 is selected, that is, the “illustration enlarged map automatic display” item is displayed. A determination process for determining whether or not the button has been pressed is executed. If it is determined that the item “automatic illustration enlarged view display” displayed on the navigation detailed setting screen is not selected within a predetermined time (for example, within about 1 minute) (S412: NO), CPU41 transfers to the process of S419 mentioned later.

  On the other hand, if it is determined that the item “automatic display of enlarged illustration” displayed on the navigation detail setting screen is selected within a predetermined time (for example, within about 1 minute) (S412: YES), the CPU 41 After highlighting the item “automatic display of enlarged illustration” by black and white reverse display or the like to indicate that it has been selected, the process proceeds to S413.

  In S <b> 413, the CPU 41 reads the enlarged map flag from the RAM 42, and executes a determination process for determining whether or not the enlarged map flag is set to “ON”. If it is determined that the enlarged view flag is set to “ON” (S413: YES), the CPU 41 proceeds to the process of S414.

  In S414, the CPU 41 sets the “Yes” button corresponding to the item “Illustration enlarged map automatic display” to an effective display such as a green display, and the “No” button corresponding to the item “Illustration enlarged map automatic display”. Is displayed in white or the like to be disabled, and the fact that the “illustration enlarged map automatic display” is set is displayed. Thereafter, the CPU 41 proceeds to a process of S416 described later.

  On the other hand, when it is determined that the enlarged view flag is set to “OFF” (S413: NO), the CPU 41 proceeds to the process of S415. In S 415, the CPU 41 sets the “Yes” button corresponding to the “automatic illustration enlarged display” item to invalid display such as white display and the “No” button corresponding to the “automatic illustration enlarged display” item. Is displayed in green, etc., and is set as valid display, indicating that the “illustration enlarged map automatic display” is not set. Thereafter, the CPU 41 proceeds to the process of S416.

  For example, as shown in FIG. 13, when the navigation setting button 101 displayed on the display unit 15 is pressed, the CPU 41 displays “illustration enlarged map automatic display” on the substantially left half of the display screen of the display unit 15. Displays a list of setting items such as "High-speed branch schematic diagram automatic display". When the item 102 “automatic illustration enlarged view display” is pressed, the CPU 41 inverts the item “automatic display of enlarged illustration” and displays that it has been selected.

  Further, the CPU 41 reads the enlarged map flag from the RAM 42, and when the enlarged map flag is set to "ON", the "Yes" button 103 is displayed in green and the "No" button 105 is displayed in white. Disable display.

  Next, as shown in FIG. 12, in S416, the CPU 41 executes a determination process for determining whether or not the “No” button corresponding to the item “Illustration enlarged map automatic display” has been pressed. If it is determined that the “no” button corresponding to the “automatic display of enlarged illustration” button has been pressed (S416: YES), the CPU 41 proceeds to the process of S417.

In S417, the CPU 41 sets the “Yes” button corresponding to the item “Illustration enlarged map automatic display” to invalid display such as white display and the “No” button corresponding to the item “Illustration enlarged map automatic display”. Is displayed in green, etc., and is set as valid display, indicating that the “illustration enlarged map automatic display” is not set.
In step S418, the CPU 41 reads the enlarged view flag from the RAM 42, sets the enlarged view flag to “off”, and stores the enlarged view flag in the RAM 42 again.

  Subsequently, in S419, the CPU 41 executes determination processing for determining whether or not the “complete” button displayed on the navigation detail setting screen has been pressed. For example, as shown in FIG. 13, a determination process for determining whether or not the “complete” button 106 displayed in the lower right corner of the navigation detail setting screen is pressed is executed.

When it is determined that the “complete” button displayed on the navigation detail setting screen has not been pressed within a predetermined time (for example, within about 1 minute) (S419: NO), the CPU 41 again performs S412. The subsequent processing is executed.
On the other hand, when it is determined that the “complete” button displayed on the navigation detail setting screen is pressed within a predetermined time (for example, within about 1 minute) (S419: YES), the CPU 41 performs the process. finish.

  On the other hand, if it is determined in S416 that the “No” button corresponding to the “automatic display of enlarged illustration” has not been pressed (S416: NO), the CPU 41 proceeds to the process of S420. In S420, the CPU 41 executes a determination process for determining whether or not the “Yes” button corresponding to the item “Illustration enlarged map automatic display” has been pressed. If it is determined that the “Yes” button corresponding to the “automatic illustration enlarged display” item has not been pressed (S420: NO), the CPU 41 proceeds to the process of S419.

  On the other hand, if it is determined that the “Yes” button corresponding to the item “illustration enlarged view automatic display” is pressed (S420: YES), the CPU 41 proceeds to the process of S421. In S <b> 421, the CPU 41 sets the “Yes” button corresponding to the item “Illustration enlarged map automatic display” to an effective display such as a green display, and the “No” button corresponding to the item “Illustration enlarged map automatic display”. Is displayed in white or the like to be disabled, and the fact that the “illustration enlarged map automatic display” is set is displayed.

  In S422, the CPU 41 reads the enlarged map flag from the RAM 42, sets the enlarged map flag to “on”, stores it again in the RAM 42, and then proceeds to the process of S419.

  As described above in detail, in the navigation device 1 according to the present embodiment, when the navigation AP 25 is activated, the CPU 41 exits the tunnels of the intercity highway, the urban highway, the toll road, and the general road. After that, there is a branch point such as an interchange or an intersection within the re-receiving travel distance that travels until the GPS positioning becomes possible after receiving the GPS signal again, and the first branch stored in the guide distance information 33 in advance. Even if all of the guide points to the third branch guide point are located in the tunnel, this branch point is used at the guide information output point set at a point about 500m before or about 100m before the tunnel entrance. By displaying voice guidance such as the direction of travel and an enlarged illustration of the illustration, it is possible to reliably notify with a simple configuration.

  Further, the CPU 41 branches at an interchange or intersection at a guide point located on the near side of the route from the entrance of the tunnel among the first to third branch guide points stored in the guide distance information 33 in advance. Voice guidance such as the direction of travel at the point and an enlarged illustration of the illustration are displayed. Then, the CPU 41 at the guidance point that is located in the tunnel and cannot receive the GPS signal among the first to third guidance points stored in the guidance distance information 33 in advance, the traveling direction at this branch point. Cancel voice guidance.

  Therefore, the user enters the tunnel even if there is a branching point such as an interchange or an intersection within the re-receiving travel distance that travels after leaving the tunnel until GPS positioning becomes possible, that is, near the tunnel exit. It is possible to ascertain the traveling direction and the like at this bifurcation point before starting, and to appropriately change the lane before entering the tunnel. The CPU 41 branches at an interchange or an intersection at a guide point that is located in the tunnel and cannot receive a GPS signal among the first branch guide point to the third branch guide point stored in the guide distance information 33 in advance. The voice guidance in the traveling direction at the point can be stopped, and the processing load can be reduced.

  In addition, the CPU 41 can acquire the re-reception travel distance that travels until GPS positioning is possible again corresponding to the model of the navigation device 1 from the re-reception distance information 32, and exits the tunnel on the route. After that, it is possible to accurately determine whether or not there is a branch point such as an interchange or an intersection within the re-receiving travel distance.

  In addition, this invention is not limited to the said Example, Of course, various improvement and deformation | transformation are possible within the range which does not deviate from the summary of this invention.

  For example, if the CPU 41 determines in S120 that the entrance of the tunnel is located on the near side of the route with respect to the third branch guide point (S120: YES), the process of S121 is not executed. You may make it transfer to the process of. In S320, when the CPU 41 determines that the entrance of the tunnel is positioned on the near side of the route from the third branch guide point (S320: YES), the CPU 41 executes S322 without executing the process of S321. You may make it transfer to the process of.

  As a result, the CPU 41, among the first branch guide point to the third branch guide point stored in the guide distance information 33 in advance, at the guide point located immediately before the route on the route from the entrance of the tunnel, etc. Voice guidance such as the direction of travel at the bifurcation point and an enlarged illustration of the illustration can be displayed. In addition, the CPU 41 travels at this branch point at a guide point that is located in the tunnel and cannot receive a GPS signal among the first to third branch guide points stored in the guide distance information 33 in advance. Since the voice guidance is stopped, the processing load can be reduced.

  Therefore, the user enters the tunnel even if there is a branching point such as an interchange or an intersection within the re-receiving travel distance that travels after leaving the tunnel until GPS positioning becomes possible, that is, near the tunnel exit. Of the first branch guide point to the third branch guide point stored in advance in the guide distance information 33, the direction of travel at this branch point at the guide point located immediately before the tunnel entrance. Etc. can be surely known, and the lane can be appropriately changed before entering the tunnel.

1 Navigation device 11 GPS
12 storage unit 13 control unit 15 display unit 16 voice input / output unit 17 communication unit 25 navigation AP
31 Navigation map information 32 Re-receiving distance information 33 Guide distance information 60 Intercity expressway 61, 81, 91 Tunnel entrance 62, 82, 92 Branch point 63, 83, 93 First branch guide point 64, 84, 94 Second Branch guidance point 65, 95 Third branch guidance point 66, 86, 96 Tunnel 67, 87, 97 Route 68, 88, 98 Guide information output point 69, 89, 99 Current position 73 Illustration enlarged view 75 Arrow 80 Urban expressway 90 General road

Claims (6)

Current position acquisition means for acquiring the current position by GPS positioning based on the received GPS signal;
Map information acquisition means for acquiring map information;
Re-reception distance information indicating the distance of the GPS re-receiving travel section that travels until the GPS positioning becomes possible again after leaving the GPS shielded section that cannot receive the GPS signal, corresponding to each of a plurality of types of navigation devices. Distance information acquisition means for acquiring
Based on the map information, there are pre-Symbol G PS shielding section on the route to the destination, and, after exiting the GPS shielding section, corresponding to the model of the navigation device acquired from the re-reception distance information a branch point determining means for determining whether or not there is a branch point in the GPS received again traveling in a section that,
In the GPS re-receiving travel section corresponding to the model of the navigation device obtained from the re-receiving distance information after the GPS shielded section exists on the route to the destination and after leaving the GPS shielded section If it is determined that there is a branch point, a guidance output point setting for setting a guidance information output point for outputting the guidance information of the branch point on the near side of the route from the point entering the GPS shielding section Means,
Guidance information output means for outputting guidance information of the branch point when the current position reaches the guidance information output point;
A navigation device characterized by comprising: Predetermined guidance point information acquisition means for acquiring predetermined guidance point information relating to a predetermined guidance information output point for outputting guidance information of the branch point, which is predetermined before a predetermined distance of the branch point on the route;
When the predetermined guidance information output point is present in the GPS shielding section, the guidance output point setting means is located on the near side of the route by a predetermined distance from the point entering the GPS shielding section. Set the guidance information output point,
The navigation apparatus according to claim 1, wherein the guidance information output unit stops outputting guidance information at the branch point at the predetermined guidance information output point in the GPS shielding section. When the default guidance information output point is located on the near side of the route from the point entering the GPS shielding section, the guidance output point setting means sets the default guidance information output point as the guidance information output point. The navigation device according to claim 2 , wherein the navigation device is set as follows. The default guide point information includes a plurality of default guide information output points, and among the plurality of default guide information output points, a default guide information output located on the near side of the route from a point entering the GPS shielding section. If there is a point, the guidance output point setting means sets a default guidance information output point located immediately before the point entering the GPS shielding section on the front side as the guidance information output point,
The navigation apparatus according to claim 2 , wherein the guidance information output means stops outputting the guidance information at the branch point at a predetermined guidance information output point located within the GPS shielding section. GPS shielding that cannot receive the GPS signal corresponding to each of a current position acquisition unit that acquires a current position by GPS positioning based on the received GPS signal, a map information acquisition unit that acquires map information, and a plurality of types of navigation devices A distance information acquisition unit that acquires re-receiving distance information indicating a distance of a GPS re-receiving driving section that travels until the GPS positioning is enabled again after leaving the section, and a control unit that executes,
A current position acquisition step of acquiring a current position via the current position acquisition means ;
A distance information acquisition step of acquiring the re-reception distance information corresponding to each of the plurality of types of navigation devices via the distance information acquisition means;
Based on the map information acquired via the map information acquisition means, the GPS shielding section exists on the route to the destination, and after the GPS shielding section has exited, the distance information acquisition step acquires the GPS shielding section. A branch point determination step for determining whether or not there is a branch point in the GPS re-receiving travel section corresponding to the model of the navigation device from the re-receiving distance information ,
The GPS shielding section exists on the route to the destination in the branch point determination step, and after exiting the GPS shielding section, the navigation device corresponding to the model of the navigation device acquired from the re-receiving distance information. When it is determined that there is a branch point in the GPS re-receiving section, a guide information output point for outputting the guide information of the branch point is set on the near side of the route from the point entering the GPS shielded section. A guide output point setting process,
When the current position acquired in the current position acquisition step reaches the guidance information output point set in the guidance output point setting step, a guidance information output step that outputs the guidance information of the branch point;
A navigation method characterized by comprising: GPS shielding that cannot receive the GPS signal corresponding to each of a current position acquisition unit that acquires a current position by GPS positioning based on the received GPS signal, a map information acquisition unit that acquires map information, and a plurality of types of navigation devices After leaving the section, distance information acquisition means for acquiring re-receiving distance information representing the distance of the GPS re-receiving traveling section that travels until the GPS positioning becomes possible again, to a computer,
A current position acquisition step of acquiring a current position via the current position acquisition means ;
A distance information acquisition step of acquiring the re-reception distance information corresponding to each of the plurality of types of navigation devices via the distance information acquisition means;
Based on the map information acquired via the map information acquisition means, the GPS shielding section exists on the route to the destination, and after the GPS shielding section has exited, the distance information acquisition step acquires the GPS shielding section. A branch point determination step for determining whether or not there is a branch point in the GPS re-receiving travel section corresponding to the model of the navigation device from the re-receiving distance information ,
The GPS shielding section exists on the route to the destination in the branch point determination step, and after exiting the GPS shielding section, the navigation device corresponding to the model of the navigation device acquired from the re-receiving distance information. When it is determined that there is a branch point in the GPS re-receiving section, a guide information output point for outputting the guide information of the branch point is set on the near side of the route from the point entering the GPS shielded section. A guide output point setting process,
When the current position acquired in the current position acquisition step reaches the guidance information output point set in the guidance output point setting step, a guidance information output step that outputs the guidance information of the branch point;
A program for running

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