JPH0462417A - Navigation device for vehicle - Google Patents

Abstract

PURPOSE:To display navigation information against a destination which has extension like a road in an easy-to-see state by displaying the azimuth and distance to the target road, etc., with, for example, a sectorial diagram. CONSTITUTION:A driver specifies the target road, e.g. a road R from an input device 5. Consequently, a map including the road R centering on the current place S is displayed on a display device 4 by using the data of a current place recognition sensor 2 and a map data storage device 3. Consequently, a navigation controller 1 performs a process as follows. Namely, a retrieval circle centering on the current place S is plotted. Then the intersections of the retrieval circle with a radius (l) and the road R are retrieved. Then the angles alpha and betabetween the segments (Sx1, Sx4) connecting the intersections (e.g. x1, x4) at both ends and the current place S are found and the angle (alpha) on the side where the target road R is in the retrieval circle is selected. The azimuth and distance to the target road R are displayed on the display device 5 with the sector which has the angle alpha and retrieval radius (l).

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a driving route display device for automobiles, etc., and in particular,
The present invention relates to a vehicle navigation device that can display the direction and distance to a road to reach a destination.

[Prior Art] In conventional vehicle navigation devices, the target point itself to be reached is designated as the destination to be displayed.

FIG. 5 shows a conventional vehicle navigation device.
It shows how to specify the destination on the display screen,
In the figure, the star indicated by A represents the destination point to be reached.

FIG. 6 shows a method of displaying navigation information in a conventional navigation device, in which △ indicated by S represents the current position of the vehicle, and ↑ and 1 indicated by B represent the current position of the vehicle.
5.3 km represents destination information consisting of the direction and distance to each destination point.

[Problem that the invention seeks to solve]

Even if the destination point is known to the vehicle driver, such as his home, if he is unfamiliar with the geography near his current location, the driver will be shown the direction and distance to reach his home as the destination point. Even so, it is not possible to immediately determine the route to one's home and take the best route.

Rather, it is actually more convenient to know the direction and distance to reach the nearest highway from your current location, then go out onto that highway and go to your home via it. There is.

In this case, for example, ``as long as you can get to the national highway, you can find the way.'' It is desirable to be able to obtain such information.

However, with conventional vehicle navigation devices,
Since it was necessary to specify the destination as a single point, only one point on the target road could be specified as the destination, and only information regarding that point could be obtained.

Therefore, if the point specified as the destination cannot be reached, it is necessary to specify another point as the destination again and obtain that information, which is a problem in that the operation is complicated. .

[Purpose of the invention]

The present invention aims to solve these problems of the prior art.

That is, the present invention can display navigation information for a destination that has a certain extent, such as a road, in an easy-to-understand manner by displaying the direction and distance to the target road, etc., in a shape such as a fan shape. The purpose is to provide a navigation device for vehicles.

[Means for Solving the Problems] In the present invention, in a vehicle navigation device, the current location recognition means 2 generates information indicating the current location, and the map information storage means 3 generates a map including the current location and the destination. The data is held, the target road is input using the input means 5, and the current position is calculated by the calculation means 1 and the intersection points at both ends of two or more intersections between the destination road and a circle or other figure centered on the current location. Among the corners between the connecting straight lines, the corner that includes the destination road in this shape is the open corner, and the length of the line segment connecting both intersections and the current location is determined as the distance between both greens on the map that includes the current location, The display means 4 displays on the screen a map including the current location from the map storage means 3, information about the current location on this map from the current location recognition means 2, and the figure determined as described above from the calculation means 1. The structure is such that it is displayed on the screen. This aims to achieve the above-mentioned purpose.

[For production]

Generates information indicating the current location, maintains map data including the current location and destination, inputs the target road, and selects the intersection of two or more points of intersection between a circle or other shape centered on the current location and the destination road. Among the corners between the straight lines connecting the intersection points at both ends and the current location, the corner that includes the destination road in this shape is the open corner, and the shape that includes the current location is the length of the line segment connecting both intersections and the current location as the distance between both greens. Determine on the map. A map containing your current location, information about your current location on this map, and the shape determined as described above are displayed on the screen, so you can easily locate a destination that has a certain extent, such as a road, and calculate the direction and distance. It can be displayed on a map using a shape such as a fan shape. Therefore,
Since there is no need to specify a specific point on the target road to obtain destination information, it is possible to realize a navigation device that can reduce the number of operations and the operation time.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

The embodiment shown in FIGS. 1 to 4 includes a current location recognition sensor 2 to generate information indicating the current location, and a map data storage device 3 to store map data including the current location and destination. It is equipped with an input device W, 5 to input the target road, and is equipped with a navigation controller W, to input the target road, and is equipped with a navigation controller to input the intersection of two or more ends of the target road and a circle or other figure centered on the current location. Among the corners between the straight line connecting the current location and the corner that includes the destination road in this shape, open the corner, and draw a shape on the map that includes the current location, with the length of the line segment connecting both intersections and the current location as the distance between the two greens. It is supposed to be decided. Then, the display device 4 displays a map including the current location from the map data storage device 3, the current location information on this map from the identification sensor 2, and the information determined as described above from the navigation controller l. It displays figures on the screen.

FIG. 1 is a block diagram showing this embodiment, and represents the overall configuration of the system.

In the figure, a navigation controller 1 performs overall control of calculations, control 1 display, etc. in this system. The current location recognition sensor 2 detects the current location of the vehicle, the vehicle speed,
For example, a direction sensor such as a geomagnetic sensor.

It consists of vehicle speed sensors such as wheel speed sensors, position sensors such as CPS receivers, etc.

The map data storage device 3 stores map information such as a CD-ROM. The display device 4 is comprised of a display such as a CRT or LCD, and displays navigation information such as current location information and destination information. The input device 5 consists of a keypad, touch panel, etc., and is used to input required setting information.

FIG. 2 shows an example of how to set destination information when specifying and searching for a destination road using the device of the embodiment shown in FIG. It shows.

FIG. 3 is a flowchart showing the process for searching and displaying the direction and distance of the destination road.

The operation of the apparatus of the above embodiment will be explained below based on these figures.

(2) The driver uses the input device 5 to specify the target road by its road symbol, for example, road R. As a result, a map including a road R centered around the current location S as shown in FIG. 2 is displayed on the display device 4 using the data from the current location recognition sensor 2 and the map data storage device 3.

As a result, the navigation controller 1 executes the following processing.

■ Draw a search centering around the current location S. The radius l for search is initially set to an initial value i0.

■、Radius! Search for the intersection of the target road R and the target road R.

In FIG. 2, Xl+ x, , X3+ x indicate the obtained intersection points.

(2) In this case, if the number of intersections is 2 or more, the process moves to (2).

(2) If the number of intersection points is 1 or 0, extend the search radius l by a predetermined length C and repeat the process from (2) onwards.

01 Find the angles α and β between the intersection point at both ends (for example, Xl + χ4) and the line segment (SXI, 5X4) connecting the current location S, and calculate the angle (α
).

■1 On the table display device 4, the destination road R is
Display direction and distance.

FIG. 4 shows an example of displaying a destination road in a fan shape, with an azimuth angle range α centered on the current location S, and a radius of 6.
It is shown that the direction and distance of the destination road R are displayed by the sector 2b.

Thereafter, the destination road R can be reached by repeating the processes ① to ② while traveling the specified distance in the specified fan-shaped direction.

Note that in step (2) above, a circle is used for the search, but other shapes such as regular polygons may also be used.

In that case, the distance of the destination road is determined by two line segments (e.g. S
The average value of x +, Sχ, ) may be used.

(Effects of the Invention) As explained above, according to the present invention, in a vehicle navigation device, a destination having a certain extent, such as a road, can be displayed on a map using figures such as a fan shape indicating the direction and distance. The driver can reach the desired road by driving within the range of the displayed graphic.

Therefore, with the navigation device of the present invention, there is no need for the driver to specify a specific point on the road to obtain destination information, so the number of operations and operation time can be reduced, and the burden on navigation can be reduced. It becomes possible to reduce the

FIG. 3 is a diagram showing a method of displaying gation information.

1... Calculating means, 2... Current location recognition means, 3...
Map information storage means, 4... Display means, 5... Input means.

Claims (1)

[Claims] (1). It has a current location recognition means for generating information indicating the current location, a map information storage means for holding map data including the current location and a destination, and an input means for inputting a target road. Among the angles between the straight line connecting the current location and the intersection of both ends of two or more intersections between a circle or other figure on the map data and the destination road, the corner that includes the destination road in the figure is the opening angle, A calculation means is provided for determining a figure on a map including the current location, in which the length of the line segment connecting the two intersection points and the current location is the distance between the two greens, and the map including the current location from the map information storage means and the current location recognition are provided. A navigation device for a vehicle, comprising display means for displaying information on the current location on the map from the means and the determined figure from the calculation means on a screen.