JP2001256595A - Route guiding method for on-vehicle navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a route guiding method for an on-vehicle navigation device capable of performing route guiding without replacing a music CD with a CD- ROM on which map data are stored as much as possible even in the case of being away from the guiding route. SOLUTION: In this route guiding method for an on-vehicle navigation device provided with a data reading part 1 capable of using both a ROM disk where the map data are stored and a music disk, the on-vehicle navigation device is provided with a storing part 7 storing search results of the guiding route, searches for the guiding route, stores the guiding route, a map around the guiding route and traffic rule data on the guiding route in the part 7 and displays information 39 on the basis of the traffic rule data when the location of a self-vehicle is away from the guiding route 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a route guidance method for a vehicle-mounted navigation device, and more particularly, to a route guidance method for a vehicle-mounted navigation device suitable for use when a vehicle is off-route from a guidance route.

[0002]

2. Description of the Related Art On-vehicle navigation devices are, for example,
A map data reading device that reads the map data from a CD-ROM storing the map data, a display device, a gyro, a GPS (Global Positioning System)
And a vehicle movement detection device for detecting the current position and current direction of the vehicle, such as a vehicle speed sensor, etc., and reads map data including the current position of the vehicle from a map data storage device, and based on the map data, Is drawn on the display screen, and the vehicle position mark (location) is superimposed on the display screen.
Scroll the map image as the vehicle moves,
By fixing the map image to the screen and moving the vehicle position mark, it is possible to see at a glance where the vehicle is currently traveling.

[0003] Usually, a vehicle navigation device is equipped with a route guidance function that allows a user to easily travel to a desired destination without making a mistake on a road. This route guidance function automatically searches for the lowest cost route from the starting point to the destination using map data by performing simulation calculations such as the horizontal search method, and stores the searched route as a guidance route. When driving, when the guidance route on the map image is displayed in a different color from other roads and is drawn thicker on the screen, or when the vehicle approaches an intersection where the route on the guidance route should be changed within a certain distance In addition, the user is guided to the destination by drawing an arrow indicating the course at an intersection where the course is to be changed on the map image and displaying the screen on the screen.

[0004]

By the way, in recent years, a map data reading device of an in-vehicle navigation device has been equipped with a map data which can use both a CD-ROM storing map data and a music CD storing music data. An in-vehicle navigation device equipped with a reading device has appeared.

A vehicle-mounted navigation device employing such a map data reading device has a storage device for storing a search result. When performing a route search, a route search is performed using a CD-ROM in which map data is stored. After the route search is completed, only the search results are stored in a storage device, and a CD storing the map data is stored.
-Swap the ROM and the CD containing the music data,
During driving, music CDs can be played. The route guidance is performed using the search results stored in the storage device, and only the search results are displayed on the display unit. Also, since only the search results are stored and only the search results are displayed, a flash memory or the like having a small storage capacity is used for the storage device. With this configuration, an inexpensive in-vehicle navigation device is realized.

However, an on-vehicle navigation device employing a map data reading device capable of using both a CD-ROM storing such map data and a music CD differs from the search result stored in the storage device. When the vehicle travels on a road, for example, when the driver mistakes the road and deviates from the guidance route, only the search result is stored in the storage device, so that another route cannot be searched again. For this reason, in such a case, the in-vehicle navigation device prompts the user to set the CD-ROM storing the map data again in the reading device, and returns the C-ROM storing the map data.
When the D-ROM is set, the route search is performed again.

[0007] Therefore, the user can use the CD-RO storing the music CD and the map data used in the map data reading device.
M must be replaced. However, in such a case, since the driver is usually driving, it is difficult to replace the music CD with the CD-ROM storing the map data, and there is a risk of driving mistakes, which may cause a traffic accident. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to store a music CD and a map data containing map data as much as possible even if the vehicle deviates from the guidance route.
An object of the present invention is to provide a route guidance method for an in-vehicle navigation device capable of performing route guidance without replacing a D-ROM.

[0009]

In order to solve the above problem, a route guidance method for an in-vehicle navigation device having a data readout unit capable of using both a ROM disk storing map data and a music disk is provided. The in-vehicle navigation device includes a storage unit that stores a search result of the guidance route, searches the guidance route and stores the guidance route, a map around the guidance route, and traffic regulation data on the guidance route in the storage unit. When the position of the vehicle deviates from the guidance route, information based on the traffic regulation data is displayed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A route guidance method for a vehicle-mounted navigation device according to the present invention will be described with reference to FIGS. Here, FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device that realizes the route guidance method of the in-vehicle navigation device of the present invention, and FIG. 2 is a diagram of the in-vehicle navigation device when the vehicle deviates from the guidance route. FIG. 3 is a flowchart showing the operation, and FIG. 3 is a diagram showing a display example of the display unit and a schematic diagram showing an intersection included in the guidance route.

First, the configuration of a vehicle-mounted navigation device (hereinafter simply referred to as a navigation device) that realizes the route guidance method of the vehicle-mounted navigation device of the present invention will be described with reference to FIG.

Reference numeral 1 denotes a CD-ROM (not shown) storing map data composed of road layers, background layers, character / symbol layers and the like for each scale, and a music CD (not shown).
A data reading unit 2 that can use both of them is a vehicle speed detecting unit that detects the vehicle position, the traveling direction of the vehicle, and the vehicle speed. An operation unit 3 has a cursor key for map scrolling, a destination input key, and the like.
The S receiver 5 is a display unit that displays a vehicle position mark, a guidance route, and the like.

Reference numeral 6 denotes a navigation controller having a microcomputer configuration, which uses a map data stored in a CD-ROM to indicate, for example, a shortest route connecting a current position as a departure point to a destination desired by a user. Is automatically detected by the horizontal search method described above and displayed on the screen together with the vehicle position mark to perform route guidance.

The map data stored on the CD-ROM is
It is divided into longitude and latitude widths of appropriate size according to the scale level such as 1/12500, 1/25000, 1/50000, and 1/100000, and roads etc. are vertices expressed by longitude and latitude ( (Node) coordinate set. 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 search layer composed of node data and link data used for searching for a guide route, and (2) a road layer composed of node data and link data used for drawing a road ( 3) Background layer composed of polygon data for displaying buildings, rivers, etc. (4) For displaying characters such as administrative division names such as municipal names, road names, intersection names, etc., and map symbols etc. on a map And the like composed of character / symbol data. The link data of the search layer used for searching for the guidance route includes traffic regulation data (one-way and U-way) required when the vehicle actually travels.
Information such as turn prohibition) is also included.

Reference numeral 7 denotes a storage unit for storing a guidance route searched by the navigation controller 6, a map around the guidance route, and traffic regulation data existing on the guidance route, such as a flash memory or an IC card. Is used.

When searching for a guide route, the navigation controller 6 stores all traffic regulation data included in all link data connected to all the intersections on the guide route in the storage unit 7 in association with each intersection. It is supposed to keep.

When the position of the vehicle deviates from the guidance route indicated by the search result, the navigation controller 6 reads out the traffic regulation data stored in the storage unit 7 and displays a necessary regulation display (for example, one-way traffic). Etc.) are displayed.

Next, the navigation operation when the vehicle deviates from the guidance route will be described with reference to FIGS. In FIG. 3, reference numeral 31 denotes a vehicle position mark indicating the vehicle position, 32 denotes a guidance route, 33 denotes a warning message displayed when the vehicle deviates from the guidance route, 34, 35, 36, and 3
7, 38 are nodes included in the guide route 32, 39 is an icon indicating traffic regulation information, and 40 is an arrow indicating a traveling direction at an accessible intersection.

First, as shown in FIG. 3A, when the vehicle deviates from the guidance route 32 shown in the search result based on the vehicle position data from the GPS receiver 4 (step 10).
1) The navigation controller 6 displays on the screen that the vehicle is currently traveling on a route other than the guidance route 32,
Alternatively, the vehicle is notified by voice (step 102), and the vehicle is located on the guidance route 32 from the intersection 34 (hereinafter, referred to as the departure point intersection) away from the guidance route 32 and is closest to the destination direction (FIG. 3A). A predetermined number (for example, four) of the intersections 35, 36, 37, 3
8 is retrieved from the data on the guidance route stored in the storage unit 7 (step 103).

Then, the navigation controller 6 determines, among the traffic regulation data of the links connected to the respective intersections 35, 36, 37 and 38, the intersection regulation data which may be necessary when the vehicle returns to the original guidance route. Is detected from the storage unit 7 (step 104). Then, information based on the detected traffic regulation data is displayed on the display unit 5 as an icon (step 105).

Here, the icon 39 indicating the traffic regulation information displayed in step 105 is, for example, as shown in FIG.
As shown in (c), an icon indicating one-way is displayed. For an intersection without traffic regulation information, the own vehicle position is compared with the position of the intersection, and an approachable direction toward the destination is indicated by an arrow 40.

Then, the user can return to the guidance route 32 by driving according to the traffic regulation information icon 39 and the arrow 40 displayed on the display unit 4 in step 105. Thereafter, when the vehicle returns to the guidance route 32 (step 106), the navigation controller 6 deletes the warning message 33 displayed in step 102 (step 10).
7), the route guidance is restarted (step 108).

In the above description of the embodiment, a CD-ROM and a music CD are used as examples.
May be a DVD-ROM or an audio DVD instead of a music CD.

[0024]

As described above, as shown in FIG.
In a route guidance method for an in-vehicle navigation device having a data reading unit capable of using both an OM disk and a music disk, the in-vehicle navigation device includes a storage unit for storing a search result of the guidance route. Search and store the guidance route, a map around the guidance route, and traffic regulation data on the guidance route in the storage unit, and display information based on the traffic regulation data when the position of the vehicle deviates from the guidance route. Since the information for simply returning to the guidance route is displayed on the display when the vehicle deviates from the guidance route, the music disk and the ROM disk storing the map data are not replaced as much as possible. Can also provide route guidance.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle-mounted navigation device that realizes a route guidance method for a vehicle-mounted navigation device according to the present invention.

FIG. 2 is a flowchart showing the operation of the on-vehicle navigation device when the own vehicle deviates from the guidance route according to the present invention.

FIG. 3 is a diagram illustrating a display example of a display unit of the present invention and a diagram illustrating nodes included in a guidance route.

[Explanation of symbols]

Reference Signs List 1 data reading unit 2 vehicle speed detecting unit 3 operation unit 4 GPS receiver 5 display unit 6 navigation controller 7 storage unit 31 own vehicle position mark 32 guidance route 33 warning message 34, 35, 36, 37, 38 included in the guidance route Intersection 39 icon indicating traffic regulation information 40 arrow indicating driving direction

Claims (1)

[Claims] 1. A route guidance method for an in-vehicle navigation device having a data readout unit capable of using both a ROM disk storing map data and a music disk. Is stored in the storage unit to search for a guidance route, to store a guidance route, a map around the guidance route, and traffic regulation data on the guidance route in the storage unit. And displaying information based on the traffic regulation data when the vehicle travels.