JPH0690041B2 - Current position display of mobile - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current position display device for a moving body, which displays the current position of the moving body on a road map previously projected on a screen while obtaining the current position of the moving body.

BACKGROUND ART In general, as will be described later in detail, in order to provide appropriate guidance so that a driver does not get lost when he or she drives a moving body such as a car in a non-guide area, etc. , As the moving body runs,
The current position on the two-dimensional coordinates of the moving body is calculated by detecting the traveling distance and the traveling direction of the moving body using the distance sensor and the direction sensor, and the current position changes momentarily as the moving body travels. By displaying the current position on the road map, which is displayed on the screen in advance, by sequentially updating it with the point information, the current position display device of the moving body that allows the driver to confirm the current position is provided. Being developed.

Conventionally, in such a current position display device for a mobile body, the current position of the mobile body is displayed on a road map that is two-dimensionally projected on the screen (see FIG. 2). By comparing the current position on the road map displayed on the screen with the current position on the actual road, it is possible to recognize where the vehicle is currently traveling.

However, conventionally, the current position of the moving body is merely displayed on the road map that is two-dimensionally displayed on the screen.
For the user on the moving body, the display status of the screen is far from the actual driving situation on the road, and the current position on the road map displayed on the screen and the current position on the actual road are different from each other. It is difficult to handle.

The present invention has been made in consideration of the above points, and by displaying the road map projected on the screen by the perspective method, the display state of the screen can be similar to the actual traveling state of the moving body on the road. As described above, the present invention provides a current position display device for a moving body, which facilitates the correspondence between the current position on the road map displayed on the screen by the user and the current position on the actual road.

Configuration Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a basic configuration of a current position display device for a moving body according to the present invention. For example, a distance sensor 1 for outputting a pulse signal for each unit traveling distance according to rotation of a tire of the moving body, and a yaw direction, for example. The direction sensor 2 of a rate type that detects the angular velocity of change and outputs a signal proportional to the amount of change in direction with traveling of the moving body, and the number of pulse signals from the distance sensor 1 are counted to measure the traveling distance of the moving body. At the same time, the current position on the XY coordinates of the moving body for each constant traveling distance is sequentially obtained by calculating the traveling direction according to the output signal of the direction sensor 2, and the entire current position display device for the moving body is obtained. A signal processing device 3 comprising a microcomputer for controlling
A traveling locus memory that sequentially stores the data of the current position on the XY coordinates that changes with the traveling of the moving body, which is obtained by the signal processing device 3, and stores the data as finite continuous position information of the moving body. A device 4; a map information storage medium 5 in which information of a plurality of road maps is stored in advance;
A storage medium reproducing device 6 that selectively reads out road map information from the storage medium 5, and a predetermined road map is displayed on the screen based on the read map information, and on the road map displayed on the screen. The display device 7 that displays the current position of the moving body along with the traveling locus and the traveling direction of the moving body at the current position as necessary, and gives an operation command to the signal processing device 3 , The map to be displayed on the display device 7 and the starting point of the moving body on the displayed map are set, and a display command such as a traveling locus is selectively given to display the map and the traveling locus. Direction change, shift of the display position, partial enlargement display of the map and travel locus, display scale setting change such as display scale selection, etc. It is constituted by an operating device 8 which can.

With such a configuration, the selectively read map is displayed on the screen of the display device 7, and the signal processing device 3 causes the map to follow the traveling of the moving body from the starting point set on the map. The current position on the XY coordinates is obtained by calculation every moment according to the preset scale of the map, and the calculation results are sequentially sent to the traveling locus storage device 4 and the stored contents are updated. , The stored contents are constantly read and sent to the display device 7.

Thereby, on the display device 7, for example, as shown in FIG. 2, a display mark M1, which indicates the current position of the moving body, is displayed on the map displayed on the screen, and the traveling direction of the moving body at the current position is shown. The display mark M2 and the traveling locus display mark M3 from the starting point S to the current position are simulated and displayed following the traveling state of the moving body.

The above-described configuration and operation are the same as those of the conventional current position display device for a moving body described at the beginning.

The present invention is characterized in that such a current position display device for a moving body is provided with a means for displaying the road ahead on the road map viewed from the current position of the moving body by the perspective method.

Specifically, the signal processing device 3 executes means for displaying the road ahead of the moving body on the road map viewed from the current position by the perspective method.

FIG. 3 (a) shows an example when the road ahead on the road map as viewed from the current position of the moving body is displayed by the perspective method.

In this case, as shown in FIG. 3 (b), the screen of FIG. 3 (a) corresponds to the case where the current position of the moving body is displayed on the road map two-dimensionally projected on the screen. The center of the lower part of the vehicle is viewed as the current position of the moving body, and the road within the preset distance range corresponding to the visible range of the user boarding the moving body is displayed by the perspective method. ing.

In order to obtain the image of FIG. 3 (a) from the image of FIG. 3 (b), two roads within the set distance range in front of the display mark M1 of the current position of the moving body in FIG. 3 (b) are obtained. Based on the dimensional data, for example, the ratio a / b (10 mm / 10 mm) of the intervals of the front branches is converted into a predetermined ratio, and the ratio a ′ / b of the intervals of the branches in FIG. 3 (a) is converted. ′ (8mm / 6m
m) is performed, and at the same time, the two-dimensional data of the road is converted such that the width of the road becomes narrower toward the front at a constant rate.

At that time, the position information of the target buildings such as public offices on the road map is also reflected on the display screen by the perspective method so as to be a visual aid.

In addition, when the perspective display as shown in FIG. 3 (a) is performed, the current position of the moving body in the lower center of the screen is fixed and the road displayed on the screen as the moving body travels. The signal processing device 3 is caused to execute a process of scrolling.

When the perspective display is performed as shown in FIG. 3 (a), along with the map information, road type information such as whether the road on the map is a national road or a general road is stored in the map information storage medium 5. In the signal processing device 3, the type information of the road displayed by the perspective method is read out, and the road width of the road displayed by the perspective method is expressed according to the type information. It can be done.

Also, the road width information on the map is stored in advance in the map information storage medium 5, and the signal processing device 3 expresses the width of the road width displayed on the screen by the perspective method according to the road width information. It is also possible to perform such processing.

Further, the right and left lane information of the road on the map is stored in the map information storage medium 5 in advance, and the signal processing device 3
Thus, it is possible to display the right and left turn lanes on the road projected on the screen by the perspective method according to the right and left turn lane information of the road.

In the present invention, switching between the perspective display screen as shown in FIG. 3 (a) and the two-dimensional display screen as shown in FIG. 3 (b) is signaled by a selection command from the operating device 8. The processing can be selectively performed under the control of the processing device 3.

Further, under the control of the signal processing device 3, when there is no branch road, intersection, or the like on the road in the visible range on the map viewed from the current position of the moving body, a two-dimensional view is obtained from the perspective display screen. It is also possible to automatically switch to the display screen.

In addition, the perspective display screen is switched only when the vehicle approaches an intersection where it should turn, or a window display section is provided at the corner of the two-dimensional display screen, and the perspective display is overlaid on the window display section. It is possible to take appropriate means to carry out.

As described above, in the current position display device for a mobile object according to the present invention, when displaying the current position of the mobile object on the road map displayed on the screen, the current position of the front part of the road map viewed from the current position of the mobile object is displayed. The road is projected on the screen by the perspective method, and the road map displayed on the screen by the user who is on the moving body because the display state of the screen is similar to the actual traveling condition of the road on the moving body. It has an excellent advantage that it is easy to correspond the current position above and the current position on the actual road.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a current position display device for a moving body according to the present invention, FIG. 2 is a view showing an example of a display screen in the embodiment, and FIGS. 3 (a) and 3 (b). FIG. 3 is a diagram showing an example of a screen displayed by the perspective method and an example of a two-dimensionally displayed screen corresponding thereto. 1 ... Distance sensor, 2 ... Direction sensor, 3 ... Signal processing device, 4 ... Running track storage device, 5 ... Map information storage medium, 6 ... Storage medium reproducing device, 7 ... Display device, 8 ......
Operating device

Claims (3)

[Claims] 1. A current position on a two-dimensional coordinate that changes with the traveling of a mobile body is sequentially obtained by detecting a traveling distance and a traveling direction of the mobile body, and data of the obtained current position is obtained. On the basis of the above, in the current position display device for a mobile unit, the current position display unit for the mobile unit displays an updated display of the current position of the mobile unit on a screen on which a predetermined road map is selectively read from a map information storage medium in advance. A current position display device for a mobile body, characterized in that means for displaying the road ahead on the road map as viewed from the current position by perspective is adopted. 2. The road width of a road displayed by the perspective method is expressed according to road type information stored in a map information storage medium together with road map information. A current position display device for a moving body according to the item 1. 3. The width of the road displayed by the perspective method is represented according to the road width information stored in the map information storage medium together with the road map information. A current position display device for a moving body according to the item 1.