JP4860283B2 - Navigation device and information center communicating with navigation device - Google Patents

Description

  The present invention relates to a navigation device capable of correcting map data by tracing a road map displayed on a display monitor and an information center communicating with the navigation device.

2. Description of the Related Art A navigation device is known in which information defining a new road can be input by tracing the road map displayed on the display unit with a finger or the like (Patent Document 1). In this navigation apparatus, new road information is generated from input information in the processing control unit, and a map image including the new road is generated from the new road information. And a guidance route is generated from new road information and map data.
JP 2002-98535 A

  In the navigation device described in Patent Document 1, the map data is corrected by a new road by the user tracing the map screen. However, even if the existence of a new road is recognized while traveling, it is difficult to trace the map screen while traveling. For this reason, it is remembered at which point the new road existed after the end of traveling, but there are many cases where it is difficult to remember, and there is a problem that it is impossible to correct the map data after all.

The navigation device according to the present invention includes a display monitor for displaying a road map, a correction route drawing means for drawing an arbitrary correction route on the map screen displayed on the display monitor, and a current location detection for detecting the current location of the vehicle. Means, a recommended route search means for searching for a recommended route to the destination, and an out-of-route travel detection means for detecting that the travel route of the vehicle obtained based on the output of the current location detection means deviates from the recommended route. And a correction route reception for displaying the map screen of the point where the off-road travel detection means is detected on the display monitor and receiving the correction route input by the correction route drawing means on the display screen And when correcting the map data used by the recommended route searching means based on the corrected route received by the corrected route receiving means , (a) By creating a new node at the intersection with the existing link, the existing link is divided to form a plurality of divided links. (B) As the link information of the divided link, (i) a link proportional to the link length The information is calculated based on the ratio between the link length of the divided link and the link length of the existing link. (Ii) For link information that does not depend on the link length, the link information of the existing link is applied. c) When a new additional link is formed by connecting the newly established new nodes, the link cost of the additional link is set to a predetermined value so that the recommended route passes through the additional link. In a navigation device comprising correction means, a link time is set as link information proportional to the link length, and the link does not depend on the link length Set the road type and the road width as broadcast, characterized in that always set to zero as the link cost of the additional links.
The information center according to the present invention is an information center that communicates with a navigation device, and the navigation device displays a display monitor that displays a road map, and an arbitrary correction route on a map screen displayed on the display monitor. Correction route drawing means for drawing, current location detection means for detecting the current location of the vehicle, and guidance means for guiding the vehicle along the recommended route to the destination,
The information center detects search means for searching for a recommended route based on a current location and a destination transmitted from a vehicle equipped with the navigation device, and detects that the travel route of the vehicle has deviated from the recommended route. Out-of-route travel detection means and a map screen of the point where off-road travel detection is detected by the out-of-route travel detection means are transmitted to the vehicle and displayed on the display monitor, and the corrected route drawing means on the display screen When correcting the map data used by the search means based on the corrected route receiving means for receiving the input corrected route and the corrected route received by the corrected route receiving means , (a) the corrected route and the existing link A new node is formed at the intersection with the link to divide the existing link to form a plurality of divided links, and (b) as link information of the divided links. (I) link information proportional to the link length is calculated based on the ratio between the link length of the divided link and the link length of the existing link, and (ii) the link information not depending on the link length, When link information of the existing link is applied and (c) a new additional link is formed by connecting the newly established nodes, the recommended route is added as the link cost of the additional link. In an information center comprising a correction means for setting a predetermined value so as to pass through the link, a time required for the link is set as link information proportional to the link length, and the road type and link information not depending on the link length are set. A width is set and the link cost of the additional link is always set to zero .

  According to the present invention, based on detecting that the vehicle has traveled on a route different from the recommended route, a correction route is input by pressing on the road map displayed on the display monitor, and the map data is obtained by the correction route. Since the correction is made, at least the map data used at the time of searching can be easily corrected.

  In the navigation device according to the embodiment of the present invention, when the actual road does not match the map data of the navigation device, the map data can be corrected according to the actual travel route. The configuration of the navigation device is shown in FIG. The navigation device 1 in FIG. 1 can designate a route through which an occupant passes by tracing on the touch panel 18. The navigation device 1 includes a control circuit 11, ROM 12, RAM 13, current location detection device 14, image memory 15, display monitor 16, input device 17, touch panel 18, data storage unit 110, and disk drive 111. The disc drive 111 is loaded with a DVD-ROM 112 on which map data to be displayed on the display monitor 16 is recorded.

  The touch panel 18 is a transparent touch switch laminated on the surface of the display monitor 16, and an image displayed on the display monitor 16 is displayed through the touch panel 18. The touch panel 18 sends a signal corresponding to the operation position on the touch panel 18 to the touch panel control unit 19, and the touch panel control unit 19 calculates the pressed position of the touch panel 18.

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various controls by executing a control program stored in the ROM 12 using the RAM 13 as a work area. When the control circuit 11 performs a predetermined route search process based on the map data stored in the DVD-ROM 112, the processing result is displayed on the display monitor 16 as a recommended route.

  The current position detection device 14 is a device that detects the current position of the vehicle. For example, a vibration gyro 14a that detects the traveling direction of the vehicle, a vehicle speed sensor 14b that detects the vehicle speed, and a GPS signal from a GPS (Global Positioning System) satellite. It consists of a GPS sensor 14c and the like. The navigation device 1 determines a map display range, a route search start point, and the like based on the current location of the vehicle detected by the current location detection device 14, and displays the current location on the map.

  The image memory 15 stores image data to be displayed on the display monitor 16. This image data includes road map drawing data and various graphic data, which are appropriately generated based on map data stored in the DVD-ROM 112 read by the disk drive 111. The navigation device 1 can perform map display and the like by using the image data generated in this way.

  The disk drive 111 reads map data for displaying a map on the display monitor 16 from the loaded DVD-ROM 112. The map data includes map display data, route search data, and the like. These data include road link information and node information stored in the map data. The map display data has map data of a plurality of scales from a wide area to details, and the scale of the display map can be changed according to the passenger's request. The map data may be read from a recording medium other than the DVD-ROM 112, such as a CD-ROM or a hard disk.

  The display monitor 16 provides the occupant with various information such as a road map near the vehicle position as a screen display based on various information such as map data. The input device 17 has an input switch for a passenger to set various commands, and is realized by a remote controller or the like. The occupant manually operates the input device 17 according to instructions on the display screen of the display monitor 16 to select the destination and set the destination.

  As described above, the touch panel 18 is a transparent panel provided on the monitor screen of the display monitor 16, and the display screen displayed on the display monitor 16 is displayed through the touch panel 18. Further, when the display screen of the display monitor 16 is pressed, the touch panel 18 is pressed. The touch panel 18 has an input function like the input device 17. When the map screen, various buttons, display menu, etc. displayed on the display monitor 16 are pressed with a finger, the touch panel 18 is pressed, and the touch position is calculated by the touch panel control unit 19. Then, the calculated pressing position is input to the control circuit 11, and a destination is set, or functions corresponding to various buttons and display menus are executed. When the road displayed on the display monitor 16 is traced with a finger, the traced road is designated as a route desired to pass (hereinafter referred to as a designated route). The traced road is displayed as a route, and the display form, for example, the display color and line width are changed from those of other roads.

  When the destination is set by the occupant, the navigation apparatus 1 performs a route calculation from the current location detected by the GPS sensor 14c to the destination based on a predetermined algorithm. The route thus obtained (hereinafter referred to as a recommended route) is displayed on the screen separately from other roads by changing the display form, for example, the display color. Thus, the passenger can recognize the recommended route on the map on the screen. In addition, the navigation device 1 instructs the occupant to travel in the traveling direction using a screen, voice, or the like so that the vehicle can travel according to the recommended route or the specified route input by the occupant, thereby guiding the vehicle.

  The data storage unit 110 is configured by a rewritable recording medium such as a memory or a hard disk, and stores data necessary for various functions of the navigation device 1. Information stored in the data storage unit 110 is appropriately read and used by the control circuit 11. The data storage unit 110 also stores map data corrected by the passenger tracing the road.

  Next, operations for map data correction processing of the navigation device 1 will be described with reference to FIGS. In the following, as shown in FIG. 2, the vehicle 21 leaves the parking lot 22 as indicated by the dotted arrow 23, passes between the central separation zone 24 b and the central separation zone 24 c, turns right, and enters the road 27. The case where it does is demonstrated. Road 27 intersects road 28 at intersection 25 and intersects road 29 at intersection 26.

  In many cases, digitized map data of a road map used for the navigation device 1 is created from aerial photographs. For this reason, if the interval between the median strips is narrow, map data is often created with two median strips as one median strip. For example, in the case of FIG. 2, since the interval between the central separation band 24b and the central separation band 24c is narrow, map data is created with these central separation bands as one central separation band. On the other hand, since the distance between the central separation band 24a and the central separation band 24b and the distance between the central separation band 24c and the central separation band 24d are large, it is defined that the two central separation bands are separated from each other on the map data. The

  FIG. 3 is a diagram conceptually showing the links and nodes of the roads 27, 28 and 29 shown in FIG. The roads 27 to 29 are defined as links L11a to L33 and nodes N1 to N4. The road 27 is a so-called double line and is represented as links L11a to 13a and L11b to 13b. The road 28 is defined as links L21 to L23, and the road 29 is defined as links L31 to L33. The intersections of these links are defined as nodes N1 to N4. The two median strips 24b and 24c shown in FIG. 2 are defined as one median strip on the map data (see the display screen in FIG. 4), and there is one vertical line between the intersection 25 and the intersection 26. Link L12a, L12b, and there is no node near the parking lot 22. A road 27 facing the parking lot 22, that is, a road between the intersections 25 and 26, is defined by links L12a and L12b indicating two lines, and is not tangent to each other. Therefore, when searching for a recommended route proceeding in the direction of the dotted arrow 23 in FIG. 2, the route search is performed using the node N2 as a search start point, and a route passing through the link L22, the link L12a, and the link L13a is searched as a recommended route. The

  FIG. 4 is a map screen 40 displayed on the display monitor 16 indicating the recommended route searched as described above. The two median strips 24b and 24c in FIG. 2 are displayed as one median strip 43, and a recommended route 42 is displayed from the entrance / exit of the parking lot 22 to the intersection 25 and then to the intersection 26 after making a U-turn. Yes.

  However, on an actual road, as shown in FIG. 2, it is not necessary to travel according to the recommended route 42 because the vehicle can turn right after passing between the median strip 24b and the median strip 24c. Then, as shown in FIG. 5, the vehicle may turn right along a route 51 that crosses the median strip 43 and enter the road 27. In this case, the true travel route deviates from the recommended route 42. The navigation device 1 stores the point where the vehicle 21 deviates from the recommended route 42 in this way in the data storage unit 110.

  When the vehicle 21 stops after traveling along the recommended route 42, as shown in FIG. 6, the map screen 60 displays “A route different from the recommended route. Do you want to correct the map data?” An inquiry sentence 61 that prompts the user to correct the map data is displayed. The reason why the vehicle 21 is stopped is that it is not preferable to perform a correction operation while the vehicle 21 is traveling. A YES button 62 and a NO button 63 are displayed together with the inquiry sentence 61. When the map data is to be corrected, the YES button 62 is pressed. If not corrected, the NO button 63 is pressed. When the NO button 63 is pressed, the display of 61 to 63 is deleted, and only the road map around the vehicle 21 is displayed.

  When the YES button 62 is pressed, the screen is switched to the screen shown in FIG. 7, and a map screen 70 at a point where the vehicle 21 deviates from the recommended route 42 is displayed together with the recommended route 42. The occupant traces the route actually traveled on the map screen 70 and inputs the handwritten input as the corrected route 71. Based on the correction path 71 inputted by handwriting, the link and node of the map data are corrected.

  FIG. 8 is a diagram for explaining the corrected map data links and nodes. Nodes N5 and N6 are defined at locations where the link L12a and the link L12b intersect with the correction path 71, the link L12a in FIG. 3 is changed to the link L12a-1 and the link L12a-2, and the link L12b in FIG. 1 and L12b-2. Further, a portion connecting the node N5 and the node N6 is defined as a link L17.

  Thus, although map data can be corrected by hand-drawn input, correction of map data that violates traffic regulations is prohibited. For example, when a route 91 traveling in the right direction is drawn on a lane traveling in the left direction as shown in FIG. 9, it is in violation of traffic regulations that the vehicle passes on the right side. In this case, a warning sentence 92 “I am in violation of traffic regulations and amendment is not allowed” is displayed, and amendment of map data by hand-drawn input is prohibited.

  When the recommended route traveling in the direction of the dotted arrow 23 in FIG. 2 is searched after the map data is corrected as shown in FIG. 8, the node N6 in FIG. 8 is set as the search start point. Then, a route passing through the link L17, the link L12a-2, and the link L13a is searched, and the recommended route 100 is displayed on the display monitor 16, as shown in FIG. This recommended route 100 starts from the parking lot 22, turns right across the central separation zone 43, and the occupant can leave to the destination according to the recommended route 100 without a sense of incongruity.

  Next, the map data correction process by hand-drawn input described above will be described using the flowcharts of FIGS. The processing of FIGS. 11 and 12 is executed in the control circuit 11 by a program that starts when a display screen for searching for a recommended route is displayed on the display monitor 16.

  This will be described with reference to FIGS. In step S1101, a route search for the recommended route 42 is performed. In step S1102, the map screen 40 displaying the recommended route 42 together with the vehicle position mark 41 is displayed on the display monitor 16 (see FIG. 4). In step S1103, it is determined whether the route 51 (actual traveling route) on which the vehicle 21 actually travels is different from the recommended route 42. If they are different, the process proceeds to step S1104. If not, step S1103 is repeated. In step S1104, it is determined whether the vehicle 21 is stopped based on the signal from the vehicle speed sensor 14b. If the vehicle 21 is stopped, the process proceeds to step S1105. If not, the process returns to step S1103.

  In step S1105, an inquiry sentence 61 (see FIG. 6), which is a display prompting the user to change the map data by hand-drawing, is displayed. In step S1106, whether the map data is to be corrected is determined by pressing the YES button 62 or the NO button 63. When correcting, the YES button 62 is pressed, step S1106 is affirmed and the process proceeds to step S1201. If not corrected, the NO button 63 is pressed, a negative determination is made in step S1106, and the process returns to step S1103.

  In step S1201, a map screen 60 near the route where the actual running route 51 and the recommended route 42 are different is displayed (see FIG. 7). In step S1202, the input of the correction path 71 input by hand-drawing is accepted. In step S1203, it is determined whether the corrected route 71 violates traffic regulations. For example, it corresponds to a case where a road is traced in a direction in which it cannot pass a one-way road, or a case where a road is traced to turn right at an intersection where a right turn is prohibited. Whether to violate the traffic regulations is determined based on traffic regulation information stored as node information or link information in each node or link. If it is contrary to traffic regulations, an affirmative decision is made in step S1203 and the process returns to step S1103 in FIG. If the traffic regulations are not violated, a negative determination is made in step S1203, and the process proceeds to step S1204.

  In step S1204, the map data is changed based on the handwritten correction route 71. A node is formed at a portion where the correction path 71 and the link intersect, and the link is divided as the node is formed. When there are two or more newly formed nodes and these nodes are connected by the correction path 71, a link is formed between the connected nodes. The changed map data is stored in the data storage unit 110. Then, the process proceeds to step S1103 in FIG. When the ignition switch is turned off and the engine stops, the map data correction process ends.

  The link information of the divided links is created by calculating the ratio of the link length of the link before the division, which is roughly proportional to the link length such as the link cost and the required time of the link. For road types and widths that are not related to the link length, the link before the division is used as it is. Assume that the link information of a newly formed link is predetermined. For example, the link cost of a newly formed link is always zero to ensure that the recommended route passes through that link as much as possible.

The navigation device 1 according to the above embodiment has the following effects.
(1) Since the map data can be corrected by tracing the road on the road map displayed on the display monitor, the map data that does not match the actual road, in this case, the search map data can be easily corrected. Can do.
(2) The point where the actual running route deviates from the recommended route is stored, the map screen of this point is displayed, and the place where the map data is corrected is corrected. Therefore, there is no need to find out or remember the corrections.

(3) Since map data changes that violate traffic regulations are prohibited, recommended routes that violate traffic regulations are not searched for correction of map data.
(4) Since the map data correction screen is displayed only when the vehicle 21 is stopped, the map data can be corrected safely.

(5) The map data is changed by forming a node at a portion where the correction path 71 and the link intersect, and dividing the link as the node is formed. Therefore, the link information of the link before the division can be applied to the link information of the link after the division as it is or modified and applied, so that the map data can be easily changed.

The navigation device 1 of the above embodiment can be modified as follows.
(1) Although the case where the present invention is applied to a navigation apparatus has been described above, the present invention can also be applied to the following information center.
In this case, the navigation device displays the vehicle along the recommended route to the destination, the display monitor that displays the road map, the touch panel provided on the monitor screen of the display monitor, the current location detection means that detects the current location of the vehicle. Guiding means for guiding is provided. The information center that communicates with such a navigation device has a search means for searching for a recommended route based on the current location and the destination transmitted from the vehicle equipped with the navigation device, and the travel route of the vehicle has deviated from the recommended route. An off-road travel detecting means for detecting this, and a map screen of the point where off-road travel is detected by the off-road travel detecting means is transmitted to the vehicle and displayed on the display monitor, and the touch screen is pressed on the display screen. A correction route receiving unit that receives the input correction route, and a correction unit that corrects at least map data used by the search unit based on the correction route received by the correction route reception unit.

(2) The map display map data may be modified in accordance with the change of the search map data. For example, the map data may be changed such that the median strip 43 in FIG. 10 is divided into two median strips and separated at a portion intersecting the recommended route 100.
(3) In the above, since a new node is added to a pair of links that are two lines and they are connected, there is no correction of the map display data itself. However, when a new road not on the map is used as the correction route, it is preferable to correct not only the search map data but also the display map data.

The correspondence between the elements of the claims and the embodiments will be described.
The present location detection means of the present invention corresponds to the current location detection device 14, and the recommended route search means corresponds to the control circuit 11. The off-route travel detection means corresponds to the control circuit 11. The correction path receiving unit corresponds to the control circuit 11 and the touch panel 18, and the correction unit corresponds to the control circuit 11 and the data storage unit 110. The determination means corresponds to the control circuit 11, and the vehicle stop detection means corresponds to the vehicle speed sensor 14b. In addition, the above description is an example to the last, and when interpreting invention, it is not limited to the correspondence of the component of said embodiment and the component of this invention at all.

It is a block diagram which shows the structure of the navigation apparatus of embodiment of this invention. It is a figure for demonstrating a mode that a vehicle departs from a parking lot. It is the figure which showed notion the link and node of the road which faces a parking lot. It is a figure for demonstrating the searched recommended route. It is a figure for demonstrating the true driving | running route of a vehicle. It is a figure for demonstrating the inquiry which prompts correction of the map data displayed when a vehicle stops. It is a figure for demonstrating the map screen of the point from which the vehicle deviated from the recommended route. It is a figure for demonstrating the link and node of the corrected map data. It is a figure for demonstrating the display screen of the display monitor displayed when a recommended route is corrected so that it may violate a traffic regulation. It is a figure for demonstrating the recommended route searched for the route by the map data after correction. It is a flowchart for demonstrating the map data correction process by the hand drawing of the navigation apparatus in embodiment of this invention. It is a flowchart for demonstrating the map data correction process by the hand drawing of the navigation apparatus in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 11 Control circuit 13 RAM
14b Vehicle speed sensor 16 Display monitor 17 Input device 18 Touch panel 19 Touch panel control unit 110 Data storage unit 111 Disk drive 112 DVD-ROM
20, 40, 60, 70 Map screen 21 Vehicle 22 Parking lot 25, 26 Intersection 41 Own vehicle position mark 42, 100 Recommended route 24a-24d, 43 Median strip 71 Corrected route L11-L33 Link N1-N6 Node

Claims (4)

A display monitor that displays a road map;
Correction route drawing means for drawing an arbitrary correction route on the map screen displayed on the display monitor;
Current location detection means for detecting the current location of the vehicle;
A recommended route search means for searching for a recommended route to the destination;
Off-route travel detection means for detecting that the travel route of the vehicle obtained based on the output of the current location detection means deviates from the recommended route;
A corrected route receiving means for displaying on the display monitor a map screen of the point where the off-road travel detecting means is detected and receiving the corrected route input by the corrected route drawing means on the display screen; ,
When correcting the map data used by the recommended route searching means based on the corrected route received by the corrected route receiving means ,
(A) By newly establishing a new node at the intersection of the corrected route and the existing link, the existing link is divided to form a plurality of divided links;
(B) As link information of the divided link, (i) link information proportional to the link length is calculated based on a ratio between the link length of the divided link and the link length of the existing link, and (ii) a link For link information that does not depend on the length, apply the link information of the existing link,
(C) When a new additional link is formed by connecting the newly established new nodes, the link cost of the additional link is set to a predetermined value so that the recommended route passes through the additional link. A navigation device comprising correction means for
The time required for the link is set as link information proportional to the link length, the road type and width are set as link information independent of the link length, and the link cost of the additional link is always set to zero. Navigation device. The navigation device according to claim 1 , wherein
Vehicle stop detection means for detecting that the vehicle has stopped,
When the stop of the vehicle is detected, the corrected route receiving means displays a map screen of an off-route travel point. The navigation device according to claim 1 or 2 ,
When the correction route accepting unit receives an input of a correction route that crosses a pair of links that define a two-way road, the correction unit defines a node at the intersection of the pair of links and the correction route, A navigation apparatus characterized in that data correction is performed by newly defining a link connecting nodes. An information center that communicates with a navigation device,
The navigation device
A display monitor that displays a road map;
Correction route drawing means for drawing an arbitrary correction route on the map screen displayed on the display monitor;
Current location detection means for detecting the current location of the vehicle;
And guidance means for guiding the vehicle along a recommended route to the destination,
The information center
Search means for searching for a recommended route based on a current location and a destination transmitted from a vehicle equipped with the navigation device;
Off-route travel detection means for detecting that the travel route of the vehicle deviates from the recommended route;
A map screen of a point where off-road travel detection means is detected is transmitted to the vehicle and displayed on the display monitor, and the corrected route input by the corrected route drawing means on the display screen is displayed. Modified route receiving means for receiving;
Based on the correction route received by the correction route receiving means, to correct the map data used by the search means ,
(A) By newly establishing a new node at the intersection of the corrected route and the existing link, the existing link is divided to form a plurality of divided links;
(B) As link information of the divided link, (i) link information proportional to the link length is calculated based on a ratio between the link length of the divided link and the link length of the existing link, and (ii) a link For link information that does not depend on the length, apply the link information of the existing link,
(C) When a new additional link is formed by connecting the newly established new nodes, the link cost of the additional link is set to a predetermined value so that the recommended route passes through the additional link. In an information center equipped with correction means for
The time required for the link is set as link information proportional to the link length, the road type and width are set as link information independent of the link length, and the link cost of the additional link is always set to zero. Information center to do.

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