JPH0729094A - Navigation device - Google Patents

Abstract

PURPOSE:To provide a navigation system capable of precisely displaying a road where passage is regulated. CONSTITUTION:A road map data storage means 11, a present position detecting means 2, control means 3 and 4 which lets map data in the vicinity of the position detected by the present position detecting means 2 read from the road map data storage means 10 so as to generate display data and a road map displaying means 5 displaying display data generated by the control means 3 and 4 are provided in the navigation device where the storage means 10 of traffic regulation information is provided and display data which changes the display modes of the regulated road is generated based on the information of the storage means 10 of the traffic regulation information when the control means 3 and 4 detect the road where passage is regulated in a direction being roughly coincident with a self vehicle running direction in the vicinity of the present position detected by the detecting means 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device suitable for application to, for example, an automobile navigation device.

[0002]

2. Description of the Related Art Conventionally, various types of navigation devices have been developed to be mounted on automobiles. For example,
GPS (Global Positioning Sy)
Various navigation devices using a positioning device at the current position by a positioning system using artificial satellites called "system" have been put into practical use. Such a navigation device reads road map data in the vicinity of the current position detected by the positioning device from a large-capacity data storage medium such as a CD ROM, displays the read road map on a monitor receiver, and drives the vehicle currently. It is designed to be able to judge the position inside.

A conventional display mode by such a navigation device will be explained. For example, as shown in FIG. 5, a road map is displayed on the screen of the display device.
A mark M indicating the direction of travel at the current position on this road map
Is displayed. When the destination is set, the destination Pa is displayed. If there is a one-way road among the displayed roads, an arrow indicating the direction in which the road can be passed is displayed. For example, in FIG.
When the inside road a is a one-way road, an arrow a ₁ indicating the passing direction is displayed on this road a. By such a map display, it can be seen that it is not possible to go straight from the current position M to the destination Pa, and it is possible to reach the destination Pa through the roads b and c, for example.

[0004]

However, in the conventional display mode of the traffic regulation by the arrow as described above, it is difficult to promptly determine the road that cannot be passed due to one-way traffic or the like from the displayed roads. there were. That is, actually, the screen of such a navigation device is often viewed in a state where it is temporarily stopped while waiting for a signal while driving a car, and in many cases, the screen cannot be viewed for a long time. However, it was difficult to reliably judge a road that could not be traversed by just looking at the screen for a short time, based on the arrow displayed on the screen. Therefore, in the conventional display,
There was a high possibility of overlooking the arrow and entering a road that could not be reached in one way.

SUMMARY OF THE INVENTION In view of the above points, the present invention has an object of providing a display when traffic is restricted in such a navigation device so that the display content can be easily determined.

[0006]

According to the present invention, for example, as shown in FIG. 1, a road map data storage means 10, a current position detecting means 1 and a vicinity of a position detected by the current position detecting means 1 are provided. Control means 3, 4 for reading the map data from the road map data storage means 10 and creating display data
And a road map display means 5 for displaying the display data created by the control means 3 and 4, a traffic regulation information storage means 10 is provided, and the information in the traffic regulation information storage means 10 is used. Based on this, when the control means 3 and 4 detect that there is a road in the vicinity of the current position detected by the detection means 2 that is restricted from passing in a direction substantially coincident with the traveling direction of the own vehicle, this control is performed. The display data for changing the display mode of the road to be created is created.

In this case, the display color is changed as a display mode.

[0008]

According to the present invention, when a road that cannot be unidirectionally passed is in the direction in which the vehicle is traveling, the display mode of this road changes, so it is accurately announced that the road cannot be entered. It

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In this example, the navigation device is mounted on an automobile and is constructed as shown in FIG. In FIG. 1, reference numeral 1 denotes a positioning unit, and the positioning unit 1 measures the current position. In the case of this example, this positioning unit 1
For positioning, a positioning system using artificial satellites called GPS is used, and an antenna 2 for receiving signals from the artificial satellites is attached.

Then, the current position data measured by the positioning unit 1 is sequentially supplied to the system controller 3 (CPU). The system controller 3 is composed of a microcomputer and controls the operation of each part of the navigation device.

Reference numeral 10 in the figure denotes a CD ROM reproducing unit, and the CD ROM reproducing unit 10 has an optical disk (CD ROM) 1 on which road map data is recorded.
1 is mounted in advance, necessary data is read from the CD ROM 11 under the control of the disk control unit 12, and the read data is reproduced by the signal processing unit 13. In this case, the CD ROM 11 mounted on the CD ROM reproducing unit 10 stores the point data indicating the coordinate position of the intersection, the connection data of each point, etc. as the road map data, and the road traffic regulation. The data relating to is also stored in association with the data of each point.

When the current position data is supplied from the positioning unit 1 to the system controller 3, the road map data around the position indicated by this data is stored in the CD ROM.
It is read from the CD ROM 11 mounted on the reproduction unit 10 and supplied to the image processing unit 4.

Under the control of the system controller 3, the image processing unit 4 carries out a process of creating a video signal for displaying a road map from the supplied road map data. At this time, a process of displaying various characters and figures on the map is performed based on the data supplied from the system controller 3. The characters displayed on this map,
The graphic includes a mark indicating the current position and traveling direction of the own vehicle, a mark indicating the destination, and the like. Then, the image processing unit 4
The video signal created in step 3 is supplied to the display device 5. The display device 5 is installed, for example, in the vicinity of a driver's seat of an automobile, and displays a road map or the like in a color image by a video signal supplied from the image processing unit 4. In this case, the roads on the map are displayed in colors other than red (except for regulated roads described later).

A memory 6 is connected to the system controller 3, and data processing is performed using this memory 6. Further, operation information from the keyboard 7 is supplied to the system controller 3, and various operation modes such as switching of display modes are set based on the operation of the keyboard 7.

The system controller 3 of this example
If you want the image processing unit 4 to create a road map,
The data relating to the traffic regulation stored in the ROM 11 is also read out, and ± 90 toward the traveling direction from the current position is read.
If there are roads that cannot pass within the range of °, the display color of the roads that cannot pass is changed to red.

Next, the operation of changing the display color will be described with reference to the flowchart of FIG.

First, the positioning unit 1 obtains data on the current position of the vehicle detected by GPS and displays a road map near the position of the vehicle (step 101). Here, it is assumed that the current vehicle position is the coordinate position P ₀ (X ₀ , Y ₀ ), and the vehicle is moving north from this position (see FIG. 3). Next, the data of the intersections (points) within a range of ± 90 ° and within a distance of 300 m from the coordinate position P ₀ is read from the CD ROM 11 (step 102). At this time, it is determined whether or not the point data in the read range includes data regarding traffic regulation (step 103). Then, if there is no data regarding the traffic regulation, the processing here is terminated and the process returns to step 101.

If there is data regarding traffic regulation in step 103, the points of the regulation source and the regulation destination are determined (step 104). For example, in the case of the example of FIG. 3, the road a is a one-way road (that is, the point P) where the passage from the point P ₁ (X ₁ , Y ₁ ) to the point P ₂ (X ₂ , Y ₂ ) is restricted. _If it is a road that can only pass from ₂ to point P ₁ ), the regulation source is point P ₁ (X
₁ , Y ₁ ) and the regulated point is point P ₂ (X ₂ ,
Y ₂ ).

[0020] Then, the distance [Delta] d ₁ from the current position P ₀ to regulation based on P _1, the distance [Delta] d ₂ from the current position P ₀ to regulatory destination P _2, it is calculated by the system controller 3 (step 104). The distances Δd ₁ and Δd ₂ are obtained by the following equation.

[0021]

[Equation 1]

[0022]

[Equation 2]

Next, the calculated distances Δd ₁ and Δd ₂ are compared (step 105). In this comparison, when Δd ₁ > Δd ₂ , it is determined that the road is not restricted to pass in the direction in which it is currently proceeding, and the processing here is terminated and the process returns to step 101.

When it is determined in step 105 that Δd ₁ <Δd _2, it is determined that the traffic is restricted, and the points P ₁ and P ₂
The system controller 3 controls the image processing unit 4 to change the display color of the road connecting to and to red.

By performing the control in this way, a road map as shown in FIG. 4, for example, is displayed. Here, roads that cannot be entered in one way are shown by hatching instead of changing the color. Note that an arrow or the like indicating one-way traffic may be displayed at the same time.

As described above, according to the navigation device of the present embodiment, when there is a road whose one-way traffic is restricted in the direction in which the vehicle is currently traveling on the displayed map, this road is displayed. The color changes to red, and it is displayed in such a way that you can easily see that you cannot enter this road. Therefore, just by looking at this map display for a short time, it is sure that it is not possible to enter this road. For example, when you temporarily stop at a traffic light while driving a car, even if you look at it for a short time, it is definitely prohibited to enter. It turns out that reliable navigation is performed. Also, in the case of this example, the display color is changed only when necessary, and not all the display colors of the one-way road are changed, so that the road display on the map becomes difficult to see due to the change of color etc. There is no. That is, when the one-way road exists in a state where the one-way road can be passed in the same direction as the current traveling direction, the process of changing the display color is not performed, and therefore the one-way road that can be entered cannot be entered. Never mistakenly judge that it is a road.

Incidentally, the range of the regulated road in which the display color is changed as shown in the above-mentioned embodiment (distance within 300 m within ± 90 ° with respect to the traveling direction) may be other range.
The optimum one should be set according to the scale of the map.

Further, in the above-mentioned embodiment, the display color of the road whose traffic is restricted is changed, but other display modes may be changed. For example, roads whose traffic is restricted may be displayed in a blinking manner or may be displayed in a broken line. Further, the displayed color and the like may be changed depending on whether the road is a one-way road or a road on which the vehicle cannot completely travel in both directions.

Further, in the above-mentioned embodiment, the display example in which the traffic of the road itself is restricted by one-way traffic has been described. However, when more detailed restriction information is obtained, a corresponding display may be displayed. good. For example, when information such as prohibiting a right turn at each intersection is obtained, when the vehicle position approaches each intersection, the display color of the road that cannot be turned from this intersection may be changed. In addition, there are roads (such as roads where large vehicles are prohibited) where the type of vehicle (discrimination of large vehicles, etc.) in which this navigation device is installed is registered in advance in the navigation device, and only this registered vehicle type cannot pass. In this case, it may be possible to notify by a change in display color.

Furthermore, in the above-described embodiment, the present invention is applied to a device for positioning the current position by using GPS to perform navigation, but it is needless to say that the present invention is also applicable to a navigation device for detecting the current position by another method.

[0031]

According to the present invention, when a road that cannot be passed by one way or the like is in the direction in which the vehicle is traveling, the display mode (display color, etc.) of this road changes, so that you can enter this road. It is possible to quickly determine what cannot be done, and even by looking at the map display for a short time, it is possible to determine that this entry is prohibited, and the map display provides reliable guidance. Also, since only the roads that are restricted to pass in the same direction as the traveling direction of the vehicle are displayed in this way, if there is a one-way road that can pass in the direction that matches the traveling direction of the vehicle, it will be displayed. The mode does not change, only the minimum necessary display is performed, and it is possible to avoid being confused by a change in the display mode and erroneously determining that the vehicle cannot pass.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart for explaining one embodiment.

FIG. 3 is an explanatory diagram showing a setting situation according to an embodiment.

FIG. 4 is an explanatory diagram showing a display example according to an embodiment.

FIG. 5 is an explanatory diagram showing a conventional display example.

[Explanation of symbols]

 1 Positioning Unit 3 System Controller 4 Image Processing Unit 5 Display Device 10 CD ROM Playback Unit

Claims (2)

[Claims] 1. A control for causing road map data storage means, current position detection means, and map data in the vicinity of the position detected by the current position detection means to be read from the road map data storage means to create display data. Means and a road map display means for displaying the display data created by the control means, a traffic regulation information storage means is provided, and the detection is performed based on the information in the traffic regulation information storage means. When the control means detects that there is a road in the vicinity of the current position detected by the means that is restricted from traveling in a direction substantially matching the traveling direction of the host vehicle, the display mode of the restricted road is changed. A navigation device for creating display data to be displayed. 2. The navigation device according to claim 1, wherein a display color is changed as the display mode.