JP5323171B2 - Navigation device - Google Patents

Description

  The present invention identifies a current position, displays a current position on a map or a guide route, and notifies a user, and in particular, can be used in a vehicle or carried by a user and used. The present invention also relates to a navigation device that displays a current position after performing matching processing.

  Conventionally, when driving on a road with a car or the like, the current position is obtained until reaching the destination, and the current position is displayed on the display screen together with the road map, so that the user can reach the destination without getting lost. A vehicle-mounted navigation device is known.

  A GPS (Global Positioning System) navigation system using an artificial satellite is known for measuring the current position in the navigation device, which receives and receives radio waves from a plurality of artificial satellites orbiting the earth. The current position is specified by processing the data.

  The current position specified by the GPS is compared with map data stored in the map storage means or the like of the navigation device. For example, a matching process is performed on the road closest to the current position, and this position is subjected to the matching process. Is displayed on the display screen. Thereby, even when there is a slight error in GPS positioning, it is possible to correct the current location on the road and display without a sense of incongruity.

  In addition, as a navigation device, a route search from the departure point specified by the user to the destination is performed, the guide route is displayed on the display screen, and the current position measured is compared with this guide route and the matching process is performed. There is also.

  However, when traveling on roads not displayed on the map screen, or when traveling in areas other than roads such as parking lots or facilities, the above matching process is actually performed on the road. Guidance that the vehicle is traveling on the road even though the vehicle is not traveling is performed, which causes inconvenience for the user. For this reason, the following Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-340590) moves the vehicle mark on the map display screen based on the output from the position detection unit, and performs the map matching operation according to the position state of the vehicle mark. A mobile navigation device having a map matching control unit for changing the above is disclosed.

  The map matching control unit of this navigation device changes the weight of matching so that the vehicle mark is not on the road when the vehicle mark is located in the parking lot, or lowers the reliability of the candidate point for map matching and When the reliability of the estimated position is increased and the reliability of the estimated position of the current position is higher than the reliability of the map matching candidate point, only the estimated position of the current position is displayed on the display screen. Thereby, the user can recognize that “there is no matching because there is a vehicle mark in the parking lot of the facility”. Also, when traveling near a river or the like, the matching weight is changed so that it can be easily matched with surrounding roads.

By the way, among in-vehicle navigation devices, there is an in-vehicle / portable navigation device that can be used by a user by removing it from an automobile. Of these, lightweight ones can be used for outdoor activities such as cycling and mountain climbing, so they are very convenient.
JP 2002-340590 A (Claims 1, 4, 5, paragraphs [0019], [0032])

  A navigation device that can be removed from a vehicle and carried as described above may be carried by a user and used in places other than roads. At this time, when the navigation device disclosed in Patent Document 1 is used, the map matching operation is changed in accordance with the position of the vehicle mark. Therefore, the operation corresponding to each position must be set in advance. The inconvenience that it must not occur. In addition, even if the vehicle can be used without any problem when passing through the parking lot, when the vehicle goes off the road and passes through the river, the matching process is performed on the surrounding road, and the current position cannot be displayed correctly. Therefore, the user cannot correctly recognize the actual current position, which may cause misunderstanding.

  Therefore, an object of the present invention is to provide a navigation device that allows a user to easily grasp a current position without misunderstanding it as a matching position subjected to matching processing.

  A further object of the present invention is to provide a navigation device that displays a user's current position and a matching position that has been subjected to matching processing so that the user can easily grasp the current position without misunderstanding. That is.

  In order to solve the above problems, a navigation device of the present invention includes a current position detecting means for specifying a current position, a map storage means for storing map data, an input means for inputting information of a departure place and a destination, A route search means for searching for a guide route based on the map data, and information on a departure place and a destination input by the input means; and a route searched for the current position on the map data or by the route search means. A matching control means for performing a matching process, display data obtained by combining the matching position matched by the matching control means with the map data or the route, and the current position specified by the current position detecting means are displayed. A navigation system comprising: display control means for creating display data; and display means for displaying the display data. In the navigation apparatus, the display control means displays the current position specified by the current position detection means and the matching position matched by the matching control means on different maps displayed separately by screen division. Display data is created.

  The navigation device of the present invention has the following excellent effects. That is, according to the navigation device of the first aspect of the present invention, the display control means splits the current position specified by the current position detection means and the matching position matched by the matching control means by screen division. Display data to be displayed on different maps displayed separately. Therefore, the user can grasp the actual position without misunderstanding the current position.

The block diagram of the navigation apparatus concerning the Example of this invention is shown. In the embodiment of the present invention, an example is shown in which both the current position and the matching position are displayed on one display screen. In the embodiment of the present invention, an example is shown in which the current position and the matching position are displayed on separate screens created by screen division. The example which switched and displayed the present position and the matching position on another screen in the Example of this invention is shown.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and the accompanying drawings. However, the embodiments shown below exemplify a navigation device for embodying the technical idea of the present invention, and are not intended to specify the present invention for this navigation device. The present invention is equally applicable to navigation devices of other embodiments included in the scope.

  FIG. 1 is a block diagram of a navigation device according to an embodiment of the present invention. The navigation device 1 is of a type that can be used not only for in-vehicle use by being placed on a dashboard of a vehicle such as an automobile, but can be removed from the vehicle and carried by the user. The navigation device 1 includes a control means 10, a current position detection means 11, a map storage means 12, a route search means 13, a display control means 14, a matching control means 15, an input means 16, and a display means 17.

  The control means 10 is composed of a processor including a CPU, a RAM, and a ROM, and controls the operation of each part of the navigation device 1 according to a control program recorded in the RAM and ROM.

  The current position detection means 11 is composed of, for example, a GPS receiver and receives radio waves including time information from a plurality of GPS satellites orbiting the earth and calculates current position information based on the received radio waves. It is.

  Further, the current position detection means 11 may use a distance sensor or a direction sensor. In this case, the current distance detection means 11 detects the travel distance and travel direction of the vehicle, and integrates these values with respect to the reference position. To obtain the current position. This current position detection method, when combined with GPS reception, is effective in tunnels where GPS radio waves cannot be received or in high-rise buildings where errors are likely to occur.

  The map storage means 12 stores road node data including road node data and road link data in which nodes such as intersections and branch points of roads are nodes and links between the nodes are links. The road node data includes road node numbers, position coordinates, the number of connection links, intersection names, and the like. The road link data includes the number of the road node as the starting point and the end point, the road type, the link length (link cost), the required time, the number of lanes, the road width, and the like. Further, data such as bridges, tunnels, railroad crossings, and toll gates are added to the road link data as link attributes.

  The map storage means 12 further stores background data including facility data including water system data such as coastline, lake and river shape, administrative boundary data, facility location, shape, and name.

In addition to the road data and background data, the map storage means 12 may include map image data stored in a vector format in order to display the map image in an easily viewable manner.

  When the navigation apparatus 1 is used, the road data, background data, and map image data are extracted from the map storage unit 12 by a display control unit 14 (to be described later), overlapped, and displayed on the display unit 17. .

  When the departure place or destination is designated by the user, the route search means 13 refers to the road data stored in the map storage means 12 and searches for the optimum route from the departure place to the destination.

  The search for the optimum route is performed by various methods such as Dijkstra's method for linking and nodes from the road node corresponding to the current position or the starting point designated by the user to the road node corresponding to the destination designated by the user. Search, accumulate link length (link cost) and required time, etc., provide the route with the shortest total link length or total required time as a guide route, and provide road nodes and links belonging to the route as guide route data Is.

  The display control means 14 displays a predetermined range of road data, background data, map, etc., when displaying the current position on the map, when performing route guidance, or when the user specifies a predetermined position and scale. The image data is selected, and an image indicating the current position, an image indicating the trajectory of the traveling road, a guide route, and the like, and images such as various guidance explanations are superimposed and combined to create data that can be displayed on the display means 17. Is.

  The display control unit 14 also stores road data and background data stored in the map storage unit 12 and data in a predetermined range centered on the current position detected by the current position detection unit 11 from the map image data. Image data that is extracted and superimposed on the images and marks and icons indicating the current position and the matching position, a travel locus, and the like are combined and displayed on the display means 17 to create image data.

  Further, the display control unit 14 superimposes the route data searched by the route search unit 13 together with images such as various guidance explanations when the user makes a route search request by designating a departure place and a destination. Data that can be combined and displayed on the display means 17 described later is created. Further, when the user designates the scale of the display map, the road data, background data, and map image data can be enlarged / reduced to a predetermined magnification and displayed.

  The matching control means 15 corrects the matching position so that the current position displayed on the display means 17 is displayed on the road when the current position detected by the current position detection means 11 is slightly deviated from the traveling road. This makes it possible to perform a display that does not give the user a sense of incongruity. In the present embodiment, the current position indicates the current position detected by the current position detection means 11, and the matching position indicates that the current position detected by the current position detection means 11 is further matched. The position corrected on the road or the like by means 15 is suggested.

  The matching control means 15 corrects the current position when the current position detected by the current position detection means 11 is considered to be off the road. This correction is calculated by the current position detection means 11, for example. If the current location is not on the road, identify the nearest road or guide route based on the current location information, drop the perpendicular from the current location to those roads or routes, and set the intersection This is done by setting the current position after matching, that is, the matching position.

Alternatively, when the matching control unit 15 travels on a road in a predetermined direction, the current position detected immediately before is on the road, and the current position detected this time is When the angle is deviated within the range of angles, matching is performed by correcting the current position by the amount of the deviated angle difference.

  Also, if you are traveling on a road where the intersection is ahead and there is a right turn road from the intersection, if the current position detected before the right turn road is shifted to the right, When the distance from the shifted position to the intersection is within a predetermined distance range, matching is performed by correcting the current position on the right turn road as if the right turn road was turned right from the intersection.

  In this way, the matching control means 15 can display an accurate current position by performing a combination of the above matching processes.

  The input means 16 is for a user to specify a departure point and a destination, and to input support for switching a display screen, which will be described later, and includes a key, a button, a touch panel, and the like.

  The display means 17 is for displaying the display data created by the display control means 14 so that the user can visually recognize it, and is constituted by a liquid crystal display or the like. The display unit 17 may function as an input unit. In this case, selection input is performed when the user touches an icon displayed on the screen.

  The navigation device 1 of the present invention has an in-vehicle mode that is used by being placed on a dashboard of an automobile, and a non-in-vehicle mode that can be used by being detached from the automobile.

  In the in-vehicle mode, the display control unit 14 creates display data by combining the road data centered on the current position, the background data, and the map image data with a mark or icon indicating the current position subjected to the matching process. 17 is displayed.

  In the non-vehicle-mounted mode, the user removes the navigation device 1 from the automobile and uses it for portable use when walking or for guiding the road during cycling. At this time, the display control means 14 can create three types of display data described below.

  The display control means 14 is a predetermined range of road data, background data, and map image data centered on the current position detected by the current position detection means 11 or the matching position specified by matching processing by the matching control means 15. Is extracted from the map storage means 12 and a mark or icon image indicating both the current position and the matching position is combined to create display data. As a result, the display unit 17 displays both the current position and the matching position on one map screen, and the user can detect the position detected by the current position detection unit 11 and the matching position corrected by the matching control unit 15. It is possible to recognize how much deviation exists between the two (see FIG. 2).

  As another format of the display data, the display control means 14 creates display data that can be displayed by dividing the screen into two. In this case, the display data displayed on one screen is generated by combining a mark or icon image indicating the current position with road data, background data, and map image data in a predetermined range centered on the current position or the matching position. . The display data displayed on the other screen is created by combining a mark or icon image indicating the matching position with road data, background data, or map image data within a predetermined range centered on the current position or matching position. The These two display screens may be displayed by dividing the screen into two equal parts (see FIG. 3), and one of the screens is displayed as a main screen and the other screen is supplementary. A small reference screen may be displayed.

  As yet another form of display data, the display control means 14 creates a mark or icon image indicating the current position detected by the current position detection means 11 by combining it with road data, background data, and map image data within a predetermined range. Based on the user's instruction, two screens, which are a screen created by combining the matching position matched by the matching control means 15 with road data, background data, and map image data within a predetermined range. The display is switched and displayed on the display means 17. For example, when the matching position and map are normally displayed and the user wants to know the difference between the current position and the matching position, when the screen switching instruction is given by the input means 16, the screen display is switched and the current position and A map is displayed (see FIG. 4).

  Next, an example in which the current position and the matching position are displayed on the display unit 17 when the user passes other than the road will be described with reference to FIGS.

  In the example shown in FIGS. 2 to 4, there is a road 21 along the river 26 that flows from the lower part of the screen toward the upper part of the screen, the road 24 branches rightward on the intersection 22, and the road 23 is on the upper side of the screen. Connected. A parking space 25 is provided on the road 21.

  The user traveled on the road 24 by car, turned left at the intersection 22, traveled on the road 21, and parked the car in the parking lot 25. Then, I got off the car, removed the navigation device 1 of the present invention and carried it, exited the parking lot 25 and walked along the river 26. 2 to 4, the current position detected by the current position detection unit 11 is displayed as a current position mark 28, and the matching position obtained by performing the matching process by the matching control unit 15 is displayed as a matching position mark 30. ing.

  FIG. 2 shows an example of the display screen 100 in which both the current position and the matching position are displayed on one display screen. On the display screen 100, a current position mark 28 is displayed along the river 26, and a traffic route 27 from the parking lot 25 to the current position is displayed along the river 26. A matching position mark 30 is displayed on the road 23, and a passage 29 from the parking lot 25 to the matching position is displayed so as to pass through the parking lot 25, the road 21, the intersection 22, and the road 23. Referring to this display screen 100, the user can see both the current position detected by the current position detecting means 11 and the matching position matched by the matching control means 15, and without misunderstanding his position. It can be easily discriminated.

  FIG. 3 shows an example of a display screen 200 in which the current position and the matching position are displayed on different screens by screen division. In this case, the display screen 200 is divided and displayed on screen A and screen B by screen division. On each of the screens A and B, the same river 26, roads 21, 23 and 24, intersection 22 and parking lot 25 as displayed on the display screen 100 of FIG. 2 are displayed. On the screen A, a matching position mark 30 displayed on the road 23 and a passage 29 from the parking lot 25 to the matching position through the road 21, the intersection 22, and the road 23 are displayed.

  On the screen B, a current position mark 28 displayed along the river 26 and a traffic route 27 from the parking lot 25 to the current position along the river 26 are displayed. When the user refers only to the screen A, the user feels as if the user is going back on the road 21 from the parking lot 25, passing through the intersection 22 and passing the road 23. By referring to the current position mark 28 indicating the current position detected by 11, it can be clearly identified that the person is actually walking along the river 26, and no misunderstanding occurs.

FIG. 4 shows an example of a display screen in which the current position and the matching position are switched and displayed on different screens. 4A shows a display screen displaying the matching position, and FIG. 4B shows a display screen displaying the current position. On the display screens (a) and (b), the same rivers 26, roads 21, 23 and 24, intersections 22 and parking lots 25 as displayed on the display screen 100 of FIG. 2 are displayed. On the display screen C, a matching position mark 30 displayed on the road 23 and a passage 29 from the parking lot 25 to the matching position through the road 21, the intersection 22, and the road 23 are displayed.

  A display screen switching icon 340 is displayed at the upper left of the display screen (a). When the user performs a selection operation by touching the display screen switching icon 340 or the like, the screen is switched and displayed on the display screen (b). On the display screen (b), a current position mark 28 displayed along the river 26 and a passage 27 leading from the parking lot 25 to the current position along the river 26 are displayed. When the user refers only to the screen (a), he / she feels that the user goes back the road 21 from the parking lot 25, passes through the intersection 22 and passes through the road 23, but the screen (b) By referring to the current position mark 28 indicating the current position detected by the current position detecting means 11, it can be clearly identified that the person is actually walking along the river 26, and no misunderstanding occurs. .

  The navigation device of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

1: Navigation device 10: Control means 11: Current position detection means 12: Map storage means 13: Route search means 14: Display control means 15: Matching control means 16: Input means 17: Display means 28: Current position mark 30: Matching Position mark

Claims (1)

Current position detection means for specifying the current position;
Map storage means for storing map data;
An input means for inputting the information of the starting point and the destination;
Route search means for searching for a guide route based on the map data and the information of the departure place and destination input by the input means;
A matching control means for performing a matching process on the map data or on the route searched by the route search means;
Display data obtained by synthesizing the matching position matched in the matching control means with the map data or the route, and display control means for creating display data for displaying the current position specified by the current position detecting means;
In a navigation device comprising display means for displaying the display data,
The display control means creates display data for displaying the current position specified by the current position detection means and the matching position matched by the matching control means on different maps separately displayed by screen division. The navigation apparatus characterized by doing.

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