JP3366790B2 - Car navigation system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation device, and more particularly to an optimal visiting route for traveling around a sightseeing spot between a vehicle position and a destination. The present invention relates to an in-vehicle navigation device that searches for a route using map data and performs route guidance using the searched route. 2. Description of the Related Art An on-vehicle navigation device is a large-capacity storage device such as a CD-ROM for storing a large amount of map data.
It has a display device, a vehicle position detecting device that detects the current position of the vehicle, etc., reads map data including the current position of the vehicle from the CD-ROM, draws a map image based on the map data, and displays the map image on the display screen. At the same time, the vehicle position mark (location cursor) is fixed at a fixed position (for example, the center of the screen) on the display screen, and the map image is scroll-displayed according to the movement of the vehicle, or the map image is fixed on the screen, and the vehicle position mark is fixed. Is displayed so that the user can see at a glance where the vehicle is currently traveling. [0003] A map stored in a CD-ROM is divided into longitude and latitude widths of appropriate size according to the scale level, and roads and the like are represented by vertices (nodes) expressed in longitude and latitude.
Are drawn by sequentially connecting the nodes with straight lines. A road is formed by connecting two or more nodes, and a portion connecting the two nodes is called a link. The map data includes (1) a road layer including a road list, a node table, an intersection configuration node list, and an intersection net list; (2) a background layer for displaying roads, buildings, rivers, and the like on a map screen;
(3) It is composed of a character layer for displaying names of cities, towns and villages, names of roads, and the like. However, depending on the type of in-vehicle navigation device, there is a route search function capable of searching for a route from a certain starting point to a certain destination, for example, at an optimum distance, and the driver scrolls the map to change the cursor position to the destination. When the destination setting key is pressed, the cursor position is set as the destination and the current position is set as the starting point, and the shortest optimal route connecting the starting point and the destination is searched using the road layer in the map data, Using the searched route data, the guidance route for guiding the vehicle on the map image is displayed in a specific color and bold to make it distinguishable from other roads, or along the guidance route ahead of the vehicle position mark The driver can easily reach the destination by displaying a guide mark that moves. [0005] However, in the conventional route search function as described above, a visit point existing near a guide route from the current position (own vehicle position) to a destination, for example, a sightseeing spot is searched. If you want to travel within a predetermined time in consideration of the arrival time to the destination, the user takes into account the arrival time to the final destination, selects a predetermined number of sightseeing spots you want to visit with a local tourist guide, etc., A predetermined number of selected sightseeing spots must be scrolled each time, set as destinations, and each time a route search has to be performed, and there is a problem that the operation takes time and effort. From the above, the object of the present invention is:
It is an object of the present invention to provide an in-vehicle navigation device that allows a user to search for an optimal route for efficiently traveling sequentially from a present location to a destination at a destination within a desired time by a simple operation. Means for Solving the Problems The invention according to claim 1 is:
Map data storage means for storing map data, vehicle position detection means for detecting a vehicle position, destination setting means for setting a destination, and searching for a route from the vehicle position to the destination position using the map data A route search means for performing, a search route storage means for storing search route data from a vehicle position to a destination in an in-vehicle navigation device for guiding a vehicle to a destination based on a route searched by the route search means; Search range setting means for setting a search range for searching for a visit place existing along the searched route; and visiting the periphery on the search route based on the search range set by the search range setting means. A visited place for searching for a place and storing a new route that travels around the searched place as a waypoint as visited place tour route data in the searched route storage means. It is provided with a play route search means, and a visit place tour route guidance means for guiding a route to a destination while making a tour around the visit place using the visit place tour route data stored in the search route storage means. And According to a second aspect of the present invention, in the on-vehicle navigation device according to the first aspect, the traveling time setting means for setting a desired traveling time for traveling around the visited place and the visited place route searching means. A tour time comparing unit that compares the required time of the searched visit destination tour route with the tour time set by the tour time setting unit,
When the tour time of the visit place tour route is within the range of the desired tour time, the visit place tour route searching means re-searches for a new visit site based on the current visit place tour route, and When the value exceeds the range, the predetermined visit place is deleted from the current visit places. FIG. 1 is an overall configuration diagram of an on-vehicle navigation device according to an embodiment of the present invention. In the figure, 1
Is a CD-ROM storing map data composed of a road layer, a background layer, a character layer, etc., 2 is a GPS receiver for detecting a vehicle position and a vehicle azimuth by satellite navigation, 3
Is a four-directional key for performing a map scrolling operation, a cursor moving operation, and the like, and a predetermined menu screen (see FIG. 5) for searching for a sightseeing route in consideration of a tour of a sightseeing spot existing between the current location and the destination. An operation unit having a menu key, a numeric keypad, an enter key, and the like for selecting “search”;
Is a memory medium created for each region in a predetermined range, for example, an IC memory card in the present embodiment, and names and position data (longitude, latitude) of a number of sightseeing points which may be selected in advance as a visiting sightseeing destination. ), Required sightseeing time, sightseeing fee, and recommendation level are stored in association with each other (see FIG. 2). The data of the IC memory card 4 is, for example, a CD-ROM
You may put in one. Reference numeral 5 denotes a timer for measuring the current time. Reference numeral 6 denotes a map image corresponding to the current position of the vehicle, together with a vehicle position mark, a tour route around the tourist spot, and the name of a tourist spot to be visited before guiding the route to the tourist spot. , A display device for displaying to a user in advance a tourist information list (see FIG. 3) such as its estimated arrival time and sightseeing time. Numeral 10 denotes a navigation controller having a microcomputer structure, which draws a map image around the vehicle position together with a vehicle position mark by using the map data stored in the CD-ROM 1 and causes the display device 6 to display the map image.
With reference to the memory card 4 and the CD-ROM 1, an optimum sightseeing route connecting the present location to the destination is searched, and the sightseeing route is displayed on the display screen of the display device 6. [0010] One of the navigation controllers 10
1 is a buffer memory for storing map data read from the CD-ROM 1, 12 is a navigation mode,
Using the map data including the vehicle position, for example, a map image with the north facing the vehicle position as the center is drawn together with the vehicle position mark, and in the route guidance mode, the map with the north facing the vehicle position as the center, for example. A map image drawing unit 13 for drawing an image together with a vehicle position mark and a guide route, 13 operates a search area range for excursions to sightseeing spots existing along a searched route between a departure place and a destination. A search area setting unit for setting using the numeric keypad of the unit 3;
Reference numeral 14 denotes a tourist time setting unit for setting a desired tourist time by inputting a desired tourist time by a user's numeric keypad of the operation unit 3, and 15 denotes an optimal route connecting a departure point to a destination based on a destination setting unit described later. By the horizontal search method, the Dijkstra method, etc., and the search area setting unit 13
A new route that travels around the searched route based on the search area set by the IC card, searches the IC card in consideration of the user's desired sightseeing time, and travels using the searched sightseeing site as a transit point. Is stored in a route data storage unit described later as sightseeing route data. Reference numeral 16 denotes a route data storage unit that stores sightseeing route data searched by the optimum sightseeing route search unit 15, and 17 denotes a video RAM that stores images drawn in the map image drawing unit 12 and a sightseeing tour drawing unit described later. , 18 are video converters for reading out the images stored in the video RAM 17, converting them into predetermined video signals and outputting them to the display device 6. The path data storage unit 16 is configured to retain data even after the power is turned off by battery backup. Reference numeral 19 denotes a vehicle position detected by the GPS receiver 2 at the time when the destination setting key is pressed after the cursor mark at the center of the screen is set to the destination by scrolling the map when the route guidance mode is set. Is a departure point, and a destination setting unit that sets the cursor position as a destination. Reference numeral 20 denotes a sightseeing route screen drawing unit that draws a sightseeing route guidance list (see FIG. 3) when the sightseeing route is set by the operation unit 3. is there. FIG. 4 is a flowchart showing the operation of the navigation controller 10, and the operation of the present invention will be described below with reference to this flowchart. First, the operation unit 3
Is pressed, a menu screen as shown in FIG. 5 is displayed on the display screen of the display device 6 (step 101). When "sightseeing route search" is selected by a user with a selection key (not shown) from the selection menu in the displayed menu screen (step 102), a map screen is displayed on the display device 6. On this map screen, the user scrolls the map using the four direction keys (not shown) of the operation unit 3 until the user finds his / her desired destination, and moves the cursor at the desired destination. Is stopped, and the destination is set by the destination setting unit 19 when the enter key (not shown) of the operation unit 3 is pressed (step 1).
03). When the destination setting is completed, the optimal sightseeing route search unit 14 first searches for an optimal route from the current position to the destination (step 104). The destination can be set by inputting a telephone number corresponding to the destination or by selecting a specific location based on IIS information. After the search, the sightseeing route screen drawing unit 20 displays
A search area range input screen such as
(Step 105). When the user inputs, for example, "5.0" using the numeric keypad of the operation unit 3 (step 106), the optimum sightseeing route search unit 15 moves the center of a circle having a radius of 5.0 km from the current position to the destination. A sightseeing spot existing in the area obtained by moving along the guidance route toward is searched. If there is a sightseeing spot within the search area range from the current location to the destination (step 107), the sightseeing spot is searched. A search is again made as a transit point (step 108). Although the input of the search area range is performed using the ten keys, it may be performed using predetermined operation keys or the like of a remote controller. Next, the optimum sightseeing route search unit 15 checks whether there is another stopover in the section from the first stopover to the destination, and if there is no tourist stop as a stopover other than the first stopover. In step (step 109), the estimated visit time from the departure point to the destination, the sightseeing time, the sightseeing fee, and the like are calculated, and displayed as a sightseeing route guide list (see FIG. 3) on the display device 6 by the sightseeing route screen drawing unit 20. (Step 110). Here, it is determined whether the required sightseeing time displayed in the sightseeing route guide list is OK, shorter, or too long than the desired sightseeing time by the user. ", The numeric keypad" 2 "is selected when it is short, and the numeric keypad" 3 "is selected when it is long. When the user determines that the operation is OK and presses the numeric keypad “1” of the operation unit 3 (step 111), the sightseeing route search ends. Thereafter, sightseeing route guidance is executed based on the searched sightseeing route. If there is no sightseeing spot in the search area around the route from the current location to the destination in step 107, the process proceeds to step 110 and the following steps are repeated. If there is a sightseeing spot in the search area range from the first stopover to the destination in step 109, step 10
8, and repeat the following steps. Further, if the user determines in step 111 that the required sightseeing time is short, and the numeric keypad “2” of the operation unit 3 is pressed, the process returns to step 105 and further increases the search area range on the search area range input screen. And repeat the following steps. If the user determines in step 111 that the required sightseeing time is long, and the numeric key "3" of the operation unit 3 is pressed, the stopover point is deleted so as to match the desired sightseeing time (step 112). Search again (step 113),
Returning to step 110, the following steps are repeated. FIGS. 7 to 9 are explanatory diagrams for explaining the processing of the sightseeing route search, and the processing operation of the sightseeing route search will be described with reference to FIGS. First, the optimum sightseeing route search unit 15 searches for the optimum route from the current position P to the destination Q as shown by the thick line in FIG. Next, a sightseeing spot existing in a search area range obtained by moving the center of the circle (own vehicle position) from the current position P to the destination Q along the guidance route with the desired distance r set as a radius. To explore. In this figure, since the sightseeing spot A exists in the search area range, the route is searched again using the sightseeing spot A as a waypoint. Next, referring to FIG. 8, the sightseeing spot C exists in the search area range, but the sightseeing spot B does not exist in the search area range. . FIG. 9 shows a sightseeing route finally searched, and whether or not this sightseeing route is acceptable is determined by the sightseeing tour drawing unit 19 according to the sightseeing route guidance list displayed on the display device 6. Here, when the time does not match the desired time, as shown in FIG. 2, the sightseeing spot is deleted based on the recommendation score or the sightseeing time. Whether the recommendation score or the sightseeing time is prioritized can be selected by a predetermined key of the operation unit 3 (not shown). According to the present invention, it is not necessary to search for a route for each visited place, and it is possible to perform a route guidance to go around a large number of planned visited places by one operation. In addition, it is possible to travel around a predetermined number of visiting places and arrive at the final destination at the time desired by the user.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram of a vehicle-mounted navigation device according to one embodiment of the present invention. FIG. 2 is an explanatory diagram of storage contents of an IC memory card. FIG. 3 is an explanatory diagram of a tourist information list. FIG. 4 is a flowchart showing an operation of the navigation controller 10; FIG. 5 is an explanatory diagram of a menu screen. FIG. 6 is an explanatory diagram of a search area range input screen. FIG. 7 is a first explanatory diagram for explaining a sightseeing route search process. FIG. 8 is a second explanatory diagram for explaining a sightseeing route search process. FIG. 9 is a third explanatory diagram for explaining a sightseeing route search process. [Description of Signs] 1 CD-ROM 2 GPS receiver 3 Operation unit 4 IC memory card 5 Timer 6 Display device 10 Navigation controller 12 Map image drawing unit 13 Search area setting unit 14 Sightseeing time setting unit 15 Optimal sightseeing route search unit 16 Route data storage unit 17 Video RAM 18 Video conversion unit 19 Destination setting unit 20 Sightseeing route screen drawing unit

Claims (1)

(57) [Claims 1] Map data storage means for storing map data, vehicle position detection means for detecting a vehicle position, destination setting means for setting a destination, and a map Route search means for searching for a route from a vehicle position to a destination position using data; and an in-vehicle navigation device for guiding a vehicle to a destination based on the route searched by the route search means. Search route storage means for storing search route data of the following; search range setting means for setting a search range for searching for a visited place existing along the searched route; and search range setting means. Based on the set search range, a search is made for the surrounding visit points on the search route, and a new route that travels with the searched visit point as a stopover point is used as the visit destination tour route data. Visited area tour route search means stored in the search path storage means; Visited area tour route for performing route guidance to a destination while performing a visit area tour using the visited area tour route data stored in the search path storage means Guiding means and the visited area searched by the visited area tour route searching means
A display means for displaying the required time of the play route, and an evaluation for the required time displayed on the display means are selected.
Tour time selecting means, wherein the visiting place tour route searching means includes the tour time selecting means.
Is short, but if selected, the current destination
Re-search for new places to visit based on the tour route,
If the long is selected, the specified
Re-search the visiting place tour route where the visiting place was deleted.
An in-vehicle navigation device characterized in that: