JPH10253368A - Navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve an automatically switching to a corresponding display of a freeway without misjudgement when a vehicle enters the freeway. SOLUTION: In a navigation system of a vehicle which has a road map while inputting information on the position of own vehicle, there are arranged a navigation control section 1 which performs a control to display the position of own vehicle on an ordinary road and the freeway in a fixed range on a road map and a radio wave beacon receiver 5 to receive a radio wave for providing road information to the vehicle running on the freeway. The navigation control section 1 switches the display of the ordinary road to the corresponding display of the freeway corresponding to the freeway by receiving a signal from the radio wave beacon receiver 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system for a vehicle, and more particularly to a navigation system for automatically switching to a display corresponding to a highway without erroneous judgment when the vehicle enters the highway.

[0002]

2. Description of the Related Art FIG. 8 is a diagram showing a display example by a conventional navigation system. In the navigation system, the position of the own vehicle is detected, and as shown in the figure, a road map of a certain range is displayed with the position of the own vehicle in the center, and is scroll-displayed according to the traveling speed. Further, the navigation system is provided with a function of automatically correcting the position of the own vehicle on a road on a map by map matching. In addition, when a vehicle enters an expressway, the navigation system is provided with a display function corresponding to the expressway, in order to provide information specific to the expressway, in addition to the display for a general road. .

[0003]

In the navigation system, as shown in the figure, when entering a highway from a general road using a ramp, switching to a display function corresponding to the highway is performed manually as shown in FIG. Is being done. If the display function is switched automatically to the display function corresponding to the expressway by map matching, if the general road and the expressway are very close to each other, the ramp This is because when the vehicle passes by, it may be erroneously determined that the vehicle has entered the expressway, and the display may be switched to a display corresponding to the expressway. However, since this switching is performed manually, there is a problem that the operation is troublesome and the function of the angle is not often used.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and provides a navigation system capable of automatically switching to a highway corresponding display without misjudgment when entering an expressway from a general road. Aim.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a vehicle navigation system having a road map and inputting information on the position of the own vehicle. A navigation control unit that performs control to display the position of the vehicle on the road and the highway, and a radio beacon receiver that receives a radio wave that provides road information to a vehicle traveling on the highway, the navigation control unit includes: In response to reception of a signal from the radio beacon receiver, the display is switched from a display of a general road to a display corresponding to a highway corresponding to a highway. By this means, the display can be switched to a display suitable for a highway without the driver or passengers operating the navigation system, thereby enabling a safer navigation system. In particular, when driving alone, there is no need for operation, so the operation is more secure.

[0006] The navigation control unit displays a three-dimensional view of the highway in a view ahead of the vehicle as a display corresponding to the highway. By this means, when traveling on an unknown land, future driving information can be obtained in advance from the shape of the highway, so that the feeling of tension and fatigue during high-speed driving can be reduced. The navigation control unit displays the position of the vehicle behind the center of the road map with respect to the traveling direction of the vehicle, as a display corresponding to the expressway. By this means, the geographical information ahead is available as soon as possible because the speed of the vehicle is high on the highway.

The navigation control unit deletes a detailed road display composed of narrow roads from the road display on which the expressway is displayed, as the display corresponding to the expressway. By this means, the detailed view is deleted, so that the display can be easily viewed at high speed. The navigation control unit deletes a road display other than the expressway from the road display on which the expressway is displayed, as the expressway corresponding display. By this means, the display can also be easily viewed at high speed.

Further, an FM multiplex broadcast receiver for receiving traffic information to be displayed on a road map is provided, and the navigation control section enlarges a display range of the expressway as a display corresponding to the expressway, and displays the enlarged display. The traffic information obtained by the FM multiplex broadcasting receiver is also displayed in the range. By this means, the display range can be enlarged and traffic congestion information at the time of high-speed operation can be secured quickly.

When the navigation control unit searches for a route traveling on a general road, the navigation control unit performs a search for a route traveling on an expressway again by receiving a signal from the radio beacon receiver. This measure simplifies operation during high-speed operation.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an example of a navigation system according to the present invention. In a navigation system mounted on a vehicle, as shown in the figure, a navigation control unit 1 includes a CD (Compact Disc) -ROM (Read
Only Memory 2), inputs road map data from the CD-ROM 2, and further receives GPS (Global Positioning System).
em) The position of the vehicle is input from the receiver 3 and the road map and the vehicle position are scroll-displayed on the display 4. CD-ROM
2 stores various road maps as well as data for expressway correspondence display to be described later. Note that the GPS receiver 3 may be used with a traveling distance sensor and a traveling direction sensor.

Further, the navigation control unit 1 is provided with a radio wave beacon receiver 5 and an FM multiplex broadcast receiver 6. The radio beacon receiver 5 and the FM multiplex broadcast receiver 6 provide VICS (Vehicle Info) for providing traffic information such as traffic congestion.
rmation and CommunicationSystem). VICS has three types of traffic information providing means using FM multiplex broadcasting, radio beacons, and optical beacons. The FM multiplex broadcast receiver 6 provides traffic information over a wide area, and is used, for example, to display congested roads on a road map displayed on the display 4. Radio beacons and optical beacons provide traffic information when vehicles pass under them. Radio beacons are installed on expressways led by the Ministry of Construction, and optical beacons are installed on general roads other than expressways led by the National Police Agency. Therefore, the signal from the radio wave beacon receiver 5 can be obtained only from the highway.

FIG. 2 is a flowchart for explaining an example of the operation of the navigation control unit 1 of FIG. When the automatic switching mode is selected, the navigation control unit 1 monitors the reception from the radio beacon receiver 5 in step S1. In step S2, when there is no reception from the radio wave beacon receiver 5, the navigation normally displays a general road traveling on a general road. In step S3, if there is a reception from the radio wave beacon receiver 5 in step S1, the display is switched from the general road driving display of the navigation to the high-speed corresponding display corresponding to the highway. Step S
In 4, the display corresponding to the highway is continued until the switching is released, and when the switching is released, the display returns to the normal display in step S2. In this way, it is possible to automatically switch to the highway-compatible display without erroneous determination. Therefore, the display can be switched to a display suitable for the expressway without the driver or the passenger operating the navigation system, thereby enabling a safer navigation system. In particular, when driving alone, there is no need for operation, so the operation is more secure.

In addition, as the expressway correspondence display, in order to respond to the user's preference, several examples of the display are provided as shown below. FIG. 3 is a diagram showing an example of a display corresponding to an expressway displayed on the display 4. As shown in the figure, in the example of the display corresponding to the expressway, the view of the expressway in the field of view ahead of the own vehicle is simply and stereoscopically displayed. From this display example, it can be seen that the expressway turns right. When traveling on an unknown land, future driving information can be obtained from the shape of the expressway in advance, so that the feeling of tension and fatigue during high-speed driving can be reduced. At the same time, a guide display such as a distance to the destination and a time may be displayed, and a name of the municipalities currently traveling may be displayed.

FIG. 4 is a diagram showing an example of a highway-related display displayed on the display unit 4. As shown in FIG. As shown in this figure, in the example of the display corresponding to the expressway, the position of the own vehicle is displayed not at the center but at the rear with respect to the traveling direction of the own vehicle. For example, the ratio between the front and the rear is 7: 3. To be displayed. In this way, the speed of the vehicle is high on the highway, so that the geographical information ahead can be obtained as soon as possible.

FIG. 5 is a view showing an example of a highway-related display displayed on the display unit 4. As shown in FIG. This figure (a) is a detailed view of a road display including narrow roads such as a residential passage, a shopping street, and the like, and (b) of FIG. FIG. 7 is a diagram showing an example of an expressway corresponding display in which only road display is performed. By deleting the detailed view in this way, the display can be easily viewed at high speed.

FIG. 6 is a diagram showing an example of an expressway correspondence display displayed on the display 4. FIG. 7B is a diagram showing an example of an expressway corresponding display in which the display of the general road in FIG. 7A is deleted. By deleting the road display other than the expressway, the display can be more easily viewed at the time of high speed as in the above. FIG. 7 is a diagram showing an example of a highway-related display displayed on the display 4. FIG. 2 (b) shows an enlarged scale of the normal display of FIG. 2 (a). For example, the scale is reduced from 1 / 50,000 to 1/200000 and the display area of the expressway is enlarged and displayed. V
It is an example of a highway correspondence display in which congestion information can be obtained by ICS. In this way, it is possible to increase the display range of the expressway and quickly obtain traffic jam information during high-speed driving.

Further, in the navigation system, when a route search to a destination is performed using a general road, and then the destination is changed to a destination on an expressway, the radio beacon receiver 5 , The route search may be automatically performed again. The operation at the time of high-speed running of the user becomes easier.

[0018]

As described above, according to the present invention, when a vehicle enters a highway from a general road, a signal is received from a radio wave beacon receiver that provides traffic information on the highway without any erroneous judgment. The display can be switched from the general road display to the expressway corresponding display.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a navigation system according to the present invention.

FIG. 2 is a flowchart illustrating an operation example of a navigation control unit 1 of FIG.

FIG. 3 is a diagram showing an example of an expressway correspondence display displayed on a display device 4;

FIG. 4 is a diagram showing an example of an expressway correspondence display displayed on a display device 4;

FIG. 5 is a diagram showing an example of an expressway correspondence display displayed on a display device 4;

FIG. 6 is a diagram showing an example of an expressway correspondence display displayed on a display device 4;

FIG. 7 is a diagram showing an example of an expressway correspondence display displayed on the display device 4;

FIG. 8 is a diagram showing a display example by a conventional navigation system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 navigation control unit 2 CD-ROM 3 GPS receiver 4 display 5 radio beacon receiver 6 FM multiplex broadcast receiver

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI H04B 7/26 H04B 7/26 Z

Claims (7)

[Claims] 1. A navigation system for a vehicle having a road map and inputting information on the position of a vehicle, wherein the navigation control unit controls the display of the position of the vehicle on general roads and highways on a predetermined range of the road map. And a radio beacon receiver that receives a radio wave for providing road information to a vehicle traveling on an expressway, wherein the navigation control unit receives a signal from the radio beacon receiver to display a general road at high speed. A navigation system characterized by switching to a highway corresponding display corresponding to a road. 2. The navigation system according to claim 1, wherein the navigation control section displays a three-dimensional view of the highway in a field of view in front of the own vehicle as a highway corresponding display. . 3. The system according to claim 1, wherein the navigation control unit displays the position of the vehicle behind the center of the road map with respect to the traveling direction of the vehicle as a display corresponding to the expressway. The navigation system according to 1. 4. The method according to claim 1, wherein the navigation control unit deletes a detailed road display composed of narrow roads from the road display on which the expressway is displayed, as the expressway corresponding display. Navigation system as described. 5. The method according to claim 1, wherein the navigation control unit deletes a road display other than the expressway from the road display on which the expressway is displayed, as the expressway corresponding display. Navigation system. 6. An FM multiplex broadcast receiver for receiving traffic information to be displayed on a road map, wherein the navigation control unit enlarges a display range of the expressway as a display corresponding to the expressway, The navigation system according to claim 1, wherein traffic information obtained by the FM multiplex broadcast receiver is displayed in an enlarged display range. 7. The navigation control unit, when performing a route search on a general road, performs a route search on an expressway again by receiving a signal from the radio beacon receiver. The navigation system according to claim 1.