JP5820259B2 - Navigation device - Google Patents

Description

  The present invention relates to a map display technique in a navigation device.

  As a map display technique in the navigation device, a route from the current position to the destination is set as a guide route, a guide image showing the set guide route together with the current position on a map is displayed, and the vehicle travels according to the guide route In this case, a technique is known that displays an enlarged map around the intersection as detailed information about the road around the intersection when approaching an intersection that will change course such as a right or left turn (for example, Patent Document 1). 2).

Japanese Unexamined Patent Publication No. 08-159789 Japanese Patent Laid-Open No. 2001-165688

  According to the technology that displays detailed information about roads around intersections when approaching an intersection that will change courses such as turning left or right when driving according to the guidance route, the enlarged map Is displayed in place of the guide image, all of the guide image is displayed, and when the enlarged map is displayed on the guide image, a part of the guide image displayed until then is not displayed. The user cannot acquire information about the geographical area corresponding to the portion that is no longer displayed.

  Therefore, an object of the present invention is to present detailed information on a desired road section to the user so that the geographical area where the information is presented to the user is not limited as much as possible by a map.

  In order to achieve the above object, the present invention provides a current position calculation means for calculating a current position in a navigation device mounted on an automobile, and a guide image generation for generating and displaying a guide image representing the current position on a map. A road section in the map that represents details of the road section for a predetermined road section that is selected according to a predetermined rule as a road section that presents detailed information to the user in the guide image generation means. A detailed view having a shape obtained by enlarging the graphic portion representing the road width direction is included in the guide image in a form in which the detailed portion is superimposed on a position corresponding to the road section on the map.

  Here, such a navigation device changes a course when traveling along the guidance route, and a guidance route setting unit that sets a route to the destination as the guidance route. An approach detecting means for detecting an approach to an intersection, and the guide image generating means includes a guide route graphic representing the guide route on the map in the guide image, and the approach detecting means detects the approach. A figure representing the road section in the map representing the details of the road section, with the road section before and after the intersection detected by the approach detection means on the guidance route as the predetermined road section. A detailed view having a shape in which a part is enlarged in the road width direction is overlapped at a position corresponding to the road section on the map and arranged in the guide image. It may be configured to Mel so.

Also, in this case, the detailed map shows the lanes to be traveled when passing through the intersections along the guidance route on each lane of the road section on the figure simulating the predetermined road section. It is also preferable to represent the detailed route figure to be shown.
Further, the navigation device described above, in the guide image generation means, shows the details of the road section as the predetermined road section on the road on which the automobile is traveling, and represents the details of the road section. You may comprise so that the detailed figure which has the shape which expanded the figure part showing a area in the road width direction may be included in the said guidance image in the form arrange | positioned so that it might overlap with the position corresponding to the said road area on the said map.

  In this case, the navigation device sets a route to the destination as a guidance route, and an approach to an intersection that changes the course when traveling along the guidance route. An approach detecting means for detecting the guide image, and the guide image generating means includes a guide route graphic representing the guide route on the map in the guide image, and when the approach detecting means detects the approach, The detailed view may be included in the guide image.

The detailed diagram may represent each lane of the road section and the traveling direction of each lane on a figure simulating the predetermined road section.
According to such a navigation device, the detailed diagram showing the detailed information of the road section providing the detailed information to the user by the detailed map, and only the area in which the graphic part representing the road section in the map is enlarged in the road width direction is displayed. Since it is used and presented to the user, portions other than the road section of the map are not largely hidden for presentation of the detailed information. Therefore, it is possible to present detailed information of a desired road section without greatly limiting the geographical area where information is presented to the user by a map.

  As described above, according to the present invention, detailed information of a desired road section can be presented to the user so that the geographical area where the information is presented to the user is limited as much as possible.

It is a block diagram which shows the structure of the navigation apparatus which concerns on embodiment of this invention. It is a figure which shows the content of the map data which concern on embodiment of this invention. It is a flowchart which shows the guidance image display process which concerns on embodiment of this invention. It is a figure which shows the process example of a guidance image display process in embodiment of this invention.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 shows a configuration of a navigation system according to the present embodiment.
The navigation system is a device mounted on an automobile, and as shown in the figure, the navigation system includes a navigation device 1, an input device 2, a display device 3, a vehicle state sensor 4, and a GPS receiver 5. Composed. Here, the vehicle state sensor 4 is a sensor group that detects various states of the vehicle, such as an azimuth sensor such as an angular acceleration sensor or a geomagnetic sensor, or a vehicle speed sensor such as a vehicle speed pulse sensor.

  The navigation device 1 provides the user with a GUI using the map data storage unit 11, which is a storage device such as an HDD that stores map data representing the map, the current state calculation unit 12, the input device 2, and the display device 3. A GUI control unit 13, a route search unit 14, a memory 15, a control unit 16, and a guide image generation unit 17 are included.

  However, the above navigation apparatus 1 may be a CPU circuit having a general configuration including peripheral devices such as a microprocessor, a memory, and other graphic processors and geometric processors in terms of hardware. In this case, each unit of the navigation device 1 described above may be realized as a process embodied by a microprocessor executing a program prepared in advance. In this case, such a program may be provided to the navigation apparatus 1 via a recording medium or an appropriate communication path.

Next, FIG. 2 shows the contents of the map data stored in the map data storage unit 11.
As shown in the figure, the map data includes management data describing production date and time of the map data, basic map data representing the map, and the like.
The basic map data includes a road unit that represents a road network and a drawing unit that defines a display map.
Here, in the road unit, the road network is defined as a set of nodes representing road connection points such as intersections and links connecting the nodes, and the road unit includes node data provided for each node. A node table, and a link table including link data provided for each link.

  Each node data includes a node number serving as an identifier of the corresponding node, a node attribute indicating various attributes of the corresponding node, node coordinates indicating the position of the corresponding node, and a connection link indicating a link connected to the corresponding node. Information and connection node information representing another node connected to the corresponding node via one link.

  Each link data includes a link number that is an identifier of the corresponding link, a link attribute that represents various attributes of the corresponding link, and a node number of the first node that is a node that is one end point of the corresponding link. One node number, a second node number indicating a node number of a second node that is a node serving as the other end point of the corresponding link, a forward lane table, and a backward lane table are stored.

  The forward lane table has lane data provided corresponding to each lane on the corresponding link, the direction of travel from the first node to the second node, and the lane data is A lane number indicating the order of the lane counted from the lane from the end of the road among the lanes in the same traffic direction as the corresponding lane, and the traffic classification information by traveling direction Including. Here, the traveling direction-specific traffic classification information represents the type of dedicated lane related to the traveling direction, such as a left turn dedicated lane, a right turn dedicated lane, a straight traveling dedicated lane, a U-turn dedicated lane, and a non-dedicated lane.

Further, the reverse lane table has lane data provided corresponding to each lane whose traveling direction is the direction from the second node to the first node, and the contents of each lane data are stored in the forward lane table. This is the same as the lane data.
The structure of the road unit, the structure of the road connection, the shape of each road, and the structure of the lanes of each road are represented.
Now, in such a configuration, the current state calculation unit 12 of the navigation device 1 repeatedly performs the following processing.
That is, the current state calculation unit 12 determines the previous position indicated by the road unit of the basic map of the map data read from the map data storage unit 11 with respect to the current position estimated from the outputs of the vehicle state sensor 4 and the GPS receiver 5. Map matching processing with the map around the current position is performed, and the most probable coordinates as the current position and the most probable direction as the current traveling direction are determined as the current position and the current traveling direction, respectively, and the memory Set to 15.

The control unit 16 receives a destination setting from the user via the input device 2 and the GUI control unit 13, and sets the destination setting in the memory 15.
And if the control part 16 receives the setting of the destination, it will make the route search part 14 search for the guidance route which reaches the destination. The route search unit 14 reads the road unit data in the necessary geographical range from the map data storage unit 11, and obtains the minimum cost route from the current position set in the memory 15 to the destination, such as a minimum distance. The route is calculated as a guidance route based on the cost model, and the route data of the calculated guidance route is set in the memory 15.

Further, when the current position set in the memory 15 becomes near the destination, the control unit 16 determines that the destination has arrived, and clears the destination and the guidance route set in the memory 15.
In addition, the control unit 16 performs processing for setting on / off of the detailed map guidance mode in accordance with the operation of the user's input device 2 received via the GUI control unit 13.
The guide image generation unit 17 performs a process of drawing a guide image by the following guide image drawing process and displaying the guide image on the display device 3 via the GUI control unit 13.
Hereinafter, the guidance image drawing process performed by the guidance image generation unit 17 will be described.
FIG. 3 shows the procedure of the guide image drawing process.
As shown in the figure, in this process, first, a map of a map display range which is a geographical range around the current position calculated according to the current position set in the memory 15 and the map display scale set at that time is obtained. Based on the map data drawing unit stored in the map data storage unit 11, the drawing is performed in the guidance image generated this time (step 302).

Then, it is checked whether or not a guidance route is currently set in the memory (step 304). If it is not set, the process proceeds directly to step 308. If it is set, the map is drawn on the map drawn in step 302. After drawing the guide route representing the guide route (step 306), the process proceeds to step 308.
If the process proceeds to step 308, it is checked whether or not the detailed map guide mode is set to ON. If not, the memory 15 is displayed on the map drawn in step 302 in the guide image generated this time. On the map drawn in step 302 and the current position mark representing the current position set in step 302, the destination mark representing the destination set in the memory 15 is drawn (step 314) and displayed on the display device 3. The guidance image to be updated is updated to the guidance image generated this time (step 316), and the processing returns to step 302. However, in step 314, the destination mark is not drawn when the destination is not included in the map display range.

  On the other hand, if it is determined in step 308 that the detailed map guide mode is set to ON, it is further checked whether or not a guidance route is currently set in the memory (step 310). In this case, the detailed road map, which is the detailed map of the road being traveled, is drawn at the position corresponding to the road currently traveled on the map drawn in step 302 in the guidance image generated this time (step 312). ). Details of the detailed road map will be described later.

  Then, in the guidance image generated this time, the current position mark indicating the current position set in the memory 15 on the map drawn in step 302 and the map drawn in step 302 are set in the memory 15. The destination mark representing the destination is drawn (step 314), the guidance image displayed on the display device 3 is updated to the guidance image generated this time (step 316), and the processing returns to step 302.

  If it is determined in step 310 that a guidance route is set, a route that is an intersection that will change a route such as a right or left turn at the intersection of interest when traveling along the guidance route. It is checked whether or not the changed intersection is approached within a predetermined distance (for example, 300 m) (step 318). If it is not approached, it is stored in the memory 15 on the map drawn in step 302 in the guidance image generated this time. The current position mark representing the set current position and the destination mark representing the destination set in the memory 15 are drawn on the map drawn in step 302 (step 314) and displayed on the display device 3. The guide image is updated to the guide image generated this time (step 316), and the process returns to step 302.

  On the other hand, when the vehicle is traveling along the guidance route, if it is within a predetermined distance (for example, 300 m) to an intersection that will change course such as a right or left turn at the intersection of interest (step 318), the intersection A detailed map of the road section on the guide route, which is a detailed map of the road section on the nearby guide route, is drawn at a position corresponding to the road section on the map drawn in step 302 in the guidance image generated this time ( Step 320). Details of the detailed guide route upper section will be described later.

  Then, in the guidance image generated this time, the current position mark indicating the current position set in the memory 15 on the map drawn in step 302 and the map drawn in step 302 are set in the memory 15. The destination mark representing the destination is drawn (step 314), the guidance image displayed on the display device 3 is updated to the guidance image generated this time (step 316), and the processing returns to step 302.

The guide image drawing process performed by the guide image generation has been described above.
Hereinafter, a display example of the guidance image by such a guidance image drawing process will be described together with the details of the detailed road map and the detailed road section on the guidance route described above.
First, when the detailed map guide mode is not set to ON and the guide route is not set, the guide image drawn by the guide image drawing process is displayed on the map 41 around the current position as shown in FIG. In addition, a current position mark 42 indicating the current position is represented.
Further, when the detailed map guide mode is set to ON and the guide route is not set, the guide image drawn by the guide image drawing process is displayed on the guide image shown in FIG. 4A as shown in FIG. 4B. Here, the traveling road detailed map 400 is drawn. Here, the traveling road detailed map 400 includes the link data related to the traveling road included in the map data, the forward lane table in the link data, and the reverse. It is drawn based on the direction lane table and node data related to the road that is running.

  Further, as shown in the drawing, the detailed road map 400 is a figure that represents in detail the road where the current position is located, that is, the road that is running, and a graphic portion representing the road where the current position is located in the map 41. In the road width direction, the road detail map 400 in the traveling road has a shape enlarged so that the scale in the road width direction becomes a predetermined scale, and the position on the road detail map 400 corresponding to each point corresponds to the point. The position on the graphic portion representing the road in the map 41 is arranged so as to coincide with the traveling direction of the road.

  In the traveling road detailed map 400, the lanes constituting the road where the current position is located are shown, and the left turn dedicated lane / the right turn dedicated lane at each point of the road where the current position is located. The types of dedicated lanes related to the traveling direction, such as lanes / dedicated lanes / U-turn dedicated lanes / non-dedicated lanes, are also represented by arrows arranged on the lanes in the detailed road map 400 at the positions corresponding to the relevant points. Yes.

  Next, when the detailed map guide mode is not set to ON and the guide route is set, the guide image drawn by the guide image drawing process is a map 41 around the current position as shown in FIG. The current position mark 42 representing the current position, the guidance route graphic 43 representing the guidance route, and the destination mark are displayed on the top. In the illustrated example, the destination mark is not drawn in the guidance image because the destination is located outside the map display range.

Next, when the detailed map guide mode is set to ON and the guidance route is set, but the guide route is set, the guide image drawn by the guide image drawing process is not approached within the predetermined distance. , Similar to that shown in FIG. 4c.
Next, the guidance image drawn by the guidance image drawing process when the detailed map guidance mode is set to ON, the guidance route is set, and the route change intersection is approached within a predetermined distance is shown in FIG. As shown in 4d, the guidance route upper road section detail view 450 is drawn on the guidance image shown in FIG. 4c.

In addition, as shown in the drawing, the detailed road section on the guide route 450 is a road section from the current position to the route change intersection, and a predetermined distance (for example, 200 m) from the route change intersection among the road sections through which the guide route passes. A shape in which the advanced road section is defined as the target road section, and the graphic portion representing the target road section in the map 41 is expanded in the road width direction so that the scale in the road width direction of the road section detail drawing 450 on the guidance route becomes a predetermined scale. And the position on the guide route upper road section detail map 450 corresponding to each point matches the position on the graphic portion representing the road in the map 41 corresponding to the point with respect to the traveling direction of the road. Has been placed.
The guidance route upper road section detail view 450 includes link data related to the target road section included in the map data, forward lane table, reverse lane table, and node data related to the target road section in the link data. It is drawn based on.

  And in FIG. 4e, the lanes constituting the target road section are represented in the guide route upper road section detail view 450, as shown in an enlarged view of the guide route upper road section detail map 450, The types of dedicated lanes related to the direction of travel, such as left turn lanes, right turn lanes, straight-ahead lanes, U-turn lanes, and non-dedicated lanes for each lane at each point on each target road section, are also shown in the detailed road map 400 It is represented by an arrow arranged at a position corresponding to the point on the lane. Further, in the detailed route section on the guidance route 450, a guidance route detail diagram 451 is drawn which represents the guidance route by a line passing through the lane to be traveled. The lane to be traveled is calculated based on the direction of the route change such as a right turn / left turn at the route change intersection of the guidance route and the type of dedicated lane of each lane. When the navigation device 1 is a navigation device 1 that can identify a currently traveling lane equipped with a high-precision positioning device, a white line recognition device, and the like, the guidance route detailed graphic 451 is currently traveling. A route that changes from a certain lane to a lane to be traveled and passes through a route change intersection is represented.

The embodiment of the present invention has been described above.
By the way, in the above embodiment, when the detailed map guidance mode is set to ON, the current position mark 42, the destination mark, and the guidance are always displayed on the map 41 regardless of whether or not the guidance route is set. In addition to the route graphic 43, a drawing of a detailed road map 400 as shown in FIG. 4b may be used as a guide image. However, in this case, when a guidance route is set, a figure representing a section of the guidance route on the traveling road is also drawn on the traveling road detail diagram 400.

Alternatively, in the above embodiment, when the detailed map guide mode is set to ON and the guidance route is set, the current position mark 42, the destination mark, and the like are displayed on the map 41 until the route change intersection is approached. In addition to the guide route graphic 43, a drawing of a detailed road map 400 as shown in FIG. 4B may be used as a guide image. However, in this case, a figure representing a section on the traveling road of the guidance route is also drawn on the traveling road detail view 400.
Alternatively, in the above-described embodiment, when the guidance route is not set, the guide image in which the detailed road map 400 shown in FIG. 4a is not drawn even if the detailed map guide mode is set to ON is displayed. When the detailed map guidance mode is set to ON and the guidance route is set, when the route change intersection is approached within a predetermined distance, the guidance image of FIG. A guide image in which the detailed road map 400 is drawn may be generated and displayed. However, in this case, a figure representing a section on the traveling road of the guidance route is also drawn on the traveling road detail view 400.

  As described above, according to the present embodiment, the detailed information of a predetermined road section is obtained from the detailed road map 400 and the road section detailed map 450 on the guidance route, and the graphic portion representing the road in the map 41 is represented by the road width. Since only the area expanded in the direction is used for presentation to the user, the portion of the map 41 other than the road is not largely hidden for presentation of the detailed information. Therefore, detailed information on a desired road section can be performed without greatly limiting the geographical area where the information is presented to the user by the map 41.

  DESCRIPTION OF SYMBOLS 1 ... Navigation apparatus, 2 ... Input device, 3 ... Display apparatus, 4 ... Vehicle state sensor, 5 ... GPS receiver, 11 ... Map data storage part, 12 ... Current state calculation part, 13 ... GUI control part, 14 ... Route Search unit, 15 ... memory, 16 ... control unit, 17 ... guide image generation unit.

Claims (6)

A navigation device mounted on a car,
Current position calculating means for calculating the current position;
Guide image generating means for generating and displaying a guide image representing the current position on a map;
The guide image generating means, for a given road section as a road section for presenting the detailed information to the user is selected according to a predetermined rule, represents the detail of the predetermined road section, the predetermined road section in said map the enlarged shape only with a graphic portion road width direction representing a detailed view having the shape of a figure that simulates the predetermined road section, in a form arranged to overlap the position corresponding to the road section on the map, the Include in the guide image ,
3. The navigation apparatus according to claim 1, wherein the detailed diagram represents each lane of the road section and a traveling direction of the lane on a figure simulating the predetermined road section. The navigation device according to claim 1,
A guidance route setting unit for setting a route to the destination as a guidance route;
An approach detection means for detecting an approach to an intersection that will change the course when traveling along the guidance route;
The guide image generating means includes
Including a guidance route graphic representing the guidance route on the map in the guide image,
When the approach detection means detects the approach, the road section before and after the intersection detected by the approach detection means on the guidance route is defined as the predetermined road section, and the detailed map is displayed on the map. A navigation device characterized in that the navigation device is included in the guide image in a form in which it is arranged at a position corresponding to the road section. The navigation device according to claim 1,
The guide image generating means is configured such that a road section on a road on which the automobile is traveling is defined as the predetermined road section, and the detailed view is arranged at a position corresponding to the road section on the map. The navigation device is included in the guide image. The navigation device according to claim 3,
A guidance route setting unit for setting a route to the destination as a guidance route;
An approach detection means for detecting an approach to an intersection that will change the course when traveling along the guidance route;
The guide image generating means includes
Including a guidance route graphic representing the guidance route on the map in the guide image,
A navigation device characterized in that the detailed view is included in the guide image when the approach detection means detects the approach. The navigation device according to claim 2,
The detailed map includes a detailed route graphic showing a lane to be traveled when passing the intersection along the guidance route on a graphic simulating the predetermined road section. . A computer program that is read and executed by a computer installed in an automobile,
A computer program that causes the computer to function as the navigation device according to claim 1, 2, 3, 4, or 5.