JP2910515B2 - Navigation device and navigation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation apparatus and a navigation method which are preferably applied to, for example, a navigation apparatus for an automobile.

[0002]

2. Description of the Related Art Conventionally, various navigation devices have been developed for use in automobiles. For example,
GPS (Global Positioning Sy)
Various navigation devices using a positioning device of a current position by a positioning system using an artificial satellite called a "stem" have been put to practical use. Such a navigation device reads road map data near 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 displays the current road map. The position of the inside can be determined.

A conventional display mode by such a navigation device will be described. For example, as shown in FIG. 5, a road map is displayed on a screen of a display device.
A mark M indicating the traveling direction is displayed at the current position on this road map.
Is displayed. If the destination has been set, the destination Pa is displayed. If there is a one-way road among the displayed roads, an arrow indicating a direction in which the road can be passed is displayed. For example, FIG.
If the road a is one way is in, and displays the arrow a ₁ indicating the passage direction of the road a. By performing such a map display, it is understood that it is impossible to go straight to the destination Pa from the current position M as it is, and it is possible to reach the destination Pa, for example, through the roads b and c.

[0004]

However, in such a conventional traffic regulation display mode using arrows, it is difficult to quickly determine a 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 such as when the vehicle is temporarily stopped at a traffic light or the like while driving, and in many cases, the screen cannot be viewed for a very long time. However, it has been difficult to reliably determine a road that cannot be accessed by simply looking at the screen for a short time only by displaying the arrow displayed in the screen. For this reason, in the conventional display,
There was a high possibility that the driver would overlook the arrow and enter a road that could not be reached by one-way traffic.

In view of the foregoing, it is an object of the present invention to provide a navigation apparatus of this type in which a display when traffic is restricted is accurately performed so that display contents can be easily determined.

[0006]

According to the present invention, as shown in FIG. 1, for example, 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. Control means 3 and 4 for reading map data from road map data storage means 10 and creating display data
And a road map display unit 5 for displaying the display data created by the control units 3 and 4, at least the direction in which the vehicle can pass is regulated.
The storage means 10 of the traffic control information is provided about, based on the stored information of the storage unit 10 of the traffic control information, in the vicinity of the current position detection unit 2 detects, in a direction substantially coincides with the running direction of the vehicle When the control means 3 or 4 detects that there is a road on which traffic is restricted, the display mode of the restricted road is changed so that the display mode substantially matches the traveling direction of the own vehicle.
Control means that there are roads that are not restricted
Display of this unregulated road when 3 and 4 detect
In this embodiment, display data is created in a state where the display mode is a normal display mode .

[0007] In this case, the display color is changed as a display mode. In addition, the display mode
Changes can be hatched, dashed, or blinking
Things. The range near the current position is the direction of travel.
Within a specified angle and within a specified distance
You. In addition, the area near the current location is scaled according to the scale of the map.
It is made to change in the same way.

[0008]

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 of the road changes, so that it is accurately notified that the road cannot be entered. You.

[0009]

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

In this embodiment, the navigation device is mounted on an automobile, and is configured as shown in FIG. In FIG. 1, reference numeral 1 denotes a positioning unit, and the positioning unit 1 measures a current position. In the case of this example, this positioning unit 1
It is assumed that positioning is performed using a positioning system using an artificial satellite called GPS, and an antenna 2 for receiving a signal from the artificial satellite is attached.

The data of the current position 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 section of the navigation device.

In FIG. 1, reference numeral 10 denotes a CD ROM reproducing unit. 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, in the CD ROM 11 mounted on the CD ROM reproducing unit 10, point data indicating the coordinate position of the intersection, connection data of each point and the like are stored as road map data, and at the same time, road traffic regulation is performed. The data relating to each point is also stored in association with the data of each point.

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

The image processing unit 4 performs a process of creating a video signal for displaying a road map from the supplied road map data under the control of the system controller 3. At this time, a process of displaying various characters and graphics on the map is performed based on the data supplied from the system controller 3. Characters displayed on this map,
Examples of the graphic include a mark indicating the current position and traveling direction of the vehicle, a mark indicating a destination, and the like. Then, the image processing unit 4
Is supplied to the display device 5. The display device 5 is installed, for example, near the 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 in the map are displayed in colors other than red (excluding regulated roads described later).

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

The system controller 3 of the present embodiment
Is a CD when the image processing unit 4 creates a road map.
The data relating to the traffic regulation stored in the ROM 11 is also read, and ± 90
If there is a road that cannot be passed within the range of °, the display color of the road that cannot be passed 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 position of the vehicle is a coordinate position P ₀ (X ₀ , Y ₀ ), and the vehicle is traveling north from this position (see FIG. 3). Next, data of intersections (points) within a range of ± 90 ° and within a distance of 300 m from the coordinate position P _{0 in the} traveling direction are read from the CD ROM 11 (step 102). At this time, it is determined whether or not the read-out point data includes data relating to traffic regulation (step 103). If there is no data relating to the traffic regulation, the process here ends and the process returns to step 101.

If there is data relating to 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 (ie, the point P ₁ ) where the traffic from the point P ₁ (X ₁ , Y ₁ ) to the point P ₂ (X ₂ , Y ₂ ) is restricted. when to be only way possible road) from ₂ to point P _1, regulatory source point P ₁ (X
₁ , Y ₁ ), and the regulation destination 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 equations.

[0021]

(Equation 1)

[0022]

(Equation 2)

Next, the obtained distances Δd ₁ and Δd ₂ are compared (step 105). In this comparison, when Δd ₁ > Δd ₂ , it is determined that the road in which the vehicle is traveling is not restricted, and the process 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 vehicle is traveling in a direction in which 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 the color red to red.

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

As described above, according to the navigation device of the present embodiment, if a road whose traffic in the direction of the current travel is restricted by one-way traffic is present on the displayed map, this road is displayed. The color is changed to red, and it is displayed in such a state that it is easily recognized that it is impossible to enter this road. Therefore, it is certain that it is impossible to enter this road only by looking at this map display for a short time. For example, when the vehicle is temporarily stopped by a traffic light or the like while driving a car, it is surely prohibited to enter even if it is seen only for a short time. It is understood that reliable navigation is performed. Also, in this example, the display color is changed only when necessary, and not all the display colors of one-way roads are changed, so that the road display in the map becomes difficult to see due to color change. There is no. In other words, if a one-way road exists in a state where it can pass in a direction that matches the direction in which the vehicle is currently traveling, the process of changing the display color is not performed. There is no misjudgment that it is a road.

It should be noted that the range of the regulated road (the distance within 300 m within ± 90 ° with respect to the traveling direction) for changing the display color shown in the above embodiment may be another range.
What is necessary is just to set the optimal one according to the scale of the map.

Further, in the above-described embodiment, the display color of the road on which the traffic is restricted is changed, but another display mode may be changed. For example, the roads whose traffic is restricted may be blinked or displayed with broken lines. Further, the displayed color and the like may be changed depending on whether the road is one-way roads or a road on which vehicles cannot completely pass in both directions.

In the above-described embodiment, a display example in which the traffic on the road itself is restricted by one-way traffic or the like has been described. However, if more detailed regulation information can be obtained, a corresponding display may be displayed. good. For example, in a case where information such as a right turn prohibition at each intersection is obtained, when the own vehicle position approaches each intersection, the display color of a road that cannot bend from this intersection may be changed. In addition, the types of vehicles (such as large vehicles) on which the navigation device is mounted are registered in advance in the navigation device, and there are roads (such as roads on which large vehicles are prohibited) in which only the registered vehicle types cannot pass. In such a case, the change may be notified by a change in display color.

Further, in the above-described embodiment, the present invention is applied to a device that performs navigation by measuring the current position using GPS, but it is needless to say that the present invention can be applied to a navigation device that detects the current position by another method.

[0031]

According to the present invention, when a road that cannot be driven by one-way traffic is in the direction in which the vehicle is traveling, the display mode (display color, etc.) of the road changes, so that the vehicle enters this road. It is possible to quickly judge that it is not possible, and it is possible to judge that entry is prohibited by only looking at the map display for a short time, and guidance is reliably provided by the map display. In addition, only the roads whose traffic is restricted in the direction almost coincident with the traveling direction of the own vehicle are displayed in this way, so if there is a one-way road that can pass in the direction coincident with the traveling direction of the own vehicle, the display is made. The display does not change and only the minimum required display is performed, so that it is not erroneously determined that the vehicle cannot pass because of the change in the display display.

[Brief description of the 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 one embodiment.

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

[Explanation of symbols]

 Reference Signs List 1 positioning unit 3 system controller 4 image processing unit 5 display device 10 CD ROM playback unit

Claims (7)

(57) [Claims] 1. A road map data storage unit, a current position detection unit, and control for reading map data near a position detected by the current position detection unit from the road map data storage unit to create display data. Means, and a road map display means for displaying the display data created by the control means, wherein a storage means for traffic regulation information relating to at least the restriction on the direction of traffic is provided, based on the stored information of the storage means, in the vicinity of the current position of said detecting means detects, that there is a road traffic towards direction which substantially coincides with the running direction of the vehicle is restricted and detected the control means When changing the display mode of the regulated road ,
Traffic in a direction that almost matches the direction of travel of the vehicle is restricted.
When the control means detects that there is no road,
A navigation device that creates display data in which a display mode of a road not restricted by the above is set as a normal display mode . 2. The navigation device according to claim 1, wherein a display color is changed as the display mode. 3. The navigation device according to claim 1, wherein the change in the display mode is any one of hatching, broken line, and blinking display. 4. A range near the current position is within a predetermined angle and within a predetermined distance with respect to the traveling direction.
A navigation device as described. 5. The navigation device according to claim 1, wherein the range near the current position is changed according to the scale of the map. 6. A current position and a traveling direction are detected, and the vehicle can pass within a predetermined range near the detected current position.
Whether traffic regulation information is
Judgment and when there is the above traffic regulation information,
The direction of travel is compared with the direction of travel, and when the results of the comparison are almost the same.
Is displayed, and when the comparison result does not match, the predetermined display is performed.
Not a way to navigate. 7. A comparison between the restricted direction and the traveling direction.
Is the distance between the source and the current location of the regulated road
The first distance, the restriction destination of the regulated road and the current position
Calculating a second distance, which is a distance, and determining that the second distance is longer than the first distance;
7. The navigation method according to claim 6, wherein it is determined that the controlled direction and the traveling direction substantially match .