JPH05150720A - Vehicle guidance device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a vehicle travel guidance device that enables a driver to reliably know the current travel position of a vehicle. [Structure] A current traveling position of a vehicle is detected by a traveling position detecting device 11, and a map including a branch point located in front of the traveling direction of the vehicle is displayed on the display screen. It is a vehicle travel guidance device that displays the current traveling position of the vehicle. While the receiving device 13 receives the radio wave signal from the branch point information transmitting station that emits the branch point information of the branch point as a radio wave signal, at least while the occupant needs to confirm the branch point information, A map including only routes related to the branch point is displayed on the display screen of the display device 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle running guidance device for detecting and displaying the current running position of a vehicle on a map including the current running position of the vehicle.

[0002]

2. Description of the Related Art In recent years, due to the development of electronic technology and communication technology, the traveling position where the vehicle is currently traveling is detected, and the current traveling position of the vehicle is displayed on a CRT display together with a map including the traveling position of the vehicle. However, a traveling guide device for a vehicle, which is a so-called car navigation system for guiding a vehicle to a destination, has been put into practical use (for example, see Japanese Patent Laid-Open No. 62-163200).

Conventionally, although not specifically shown, this type of vehicle running guidance device is provided with a vehicle speed sensor and a direction sensor, and on the other hand, 100 meters before the branch point in front of the route on which the vehicle is currently running. From the branch point information transmission station provided in the range of 2 km to 60 km along the route
A branch point information receiving device for receiving branch point information of the branch point emitted as a radio signal having a reception area of about a meter is provided, and based on outputs from these vehicle speed sensor, direction sensor and branch point information receiving device, The current running position of the vehicle is calculated in real time by the microcomputer, and the map image signal of the map recorded in the storage device such as the CD-ROM of the microcomputer is output to the display circuit together with the calculation result, and the result is shown in FIG. As shown, CRT
The current traveling position 2 of the vehicle is displayed in real time on the map displayed on the display screen 1 of the display.

The display screen 1 of the CRT display is
The vehicle enters the reception area of the radio wave signal from the branch point information transmission station provided in front of the branch point 3 located in front of the traveling direction, and the branch point information receiving device of the vehicle receives the radio wave signal. After a while, the display screen 1 of the CRT display changes from the screen shown in FIG. 5 to the symbol display 4 of the branch point 3 as shown in FIG. Then, after a while when the vehicle passes through the branch point 3, the display screen 1 of the CRT display returns to the display shown in FIG. 5 again.

[0005]

By the way, in the above-described conventional vehicle running guidance device, the vehicle branch point information receiving device receives the radio wave signal from the branch point information transmitting station, and the map display shown in FIG. The display screen 1 of the CRT display when switching from the state to the symbol display 4 of the branch point 3 shown in FIG. 6 and, after a while after the vehicle has passed the branch point 3, the symbol display 4 of FIG. , Display screen 1 of the CRT display when returning to the map display of FIG.
In addition to the large change in the display, the branch point information receiving device of the vehicle receives the radio signal from the branch point information transmitting station, and the display screen 1 changes from the state shown in FIG. 5 to the state shown in FIG. Since the position of the vehicle has naturally changed before switching to the state shown in FIG. 6 and after returning to the state shown in FIG. 5, the current traveling position of the vehicle on the display screen 1 of the CRT display. There was a problem that it was easy to lose track of 2.

An object of the invention according to claim 1 of the present application is to ensure that the driver can confirm the current traveling position of the vehicle without losing sight of the current traveling position of the vehicle on the display screen while the vehicle is passing through the branch point. It is an object of the present invention to provide a vehicle travel guidance device that can be understood.

It is an object of the invention according to claim 2 of the present application to provide a vehicle running guidance device capable of easily knowing route information of a route relating to a branch point through which a vehicle passes.

[0008]

For this reason, the invention according to claim 1 of the present application, the traveling position detecting means for detecting the current traveling position of the vehicle, and the map including the current traveling position of the vehicle on the display screen. A vehicle travel guidance device comprising a display means for displaying and displaying the current travel position of the vehicle on a map displayed on the display screen of the display means, wherein a branch point in the front of the travel direction of the vehicle is Branch point information receiving means for receiving the radio wave signal from the branch point information transmitting station provided in front of the branch point for emitting the branch point information as a radio wave signal, and the branch point information receiving means for the branch point information. A display for displaying a map including only routes related to the branch point on the display screen of the display means at least during the time required for the passenger to confirm the branch point information after receiving the radio signal from the transmitting station. Change It is characterized in that a stage.

The invention according to claim 2 of the present application is, in the invention according to claim 1 of the present application, provided with route information display means for displaying route information on a map including only routes related to the branch points. It has a feature.

[0010]

The above-mentioned display is required for at least the time required for the occupant to confirm the branch point information after the branch point information receiving means receives the branch point information of the branch point as a radio signal from the branch point information transmitting station. The changing means displays a map including only the routes related to the branch points through which the vehicle passes on the display screen of the display means together with the current traveling position of the vehicle.

When the map including only the route related to the branch point where the vehicle passes is displayed on the display screen of the display unit together with the current traveling position of the vehicle by the display changing unit. , Route information is also displayed.

[0012]

According to the invention of claim 1 of the present application, the vehicle is at least required for the passenger to confirm the branch point information after receiving the radio signal from the branch point information transmitting station. A map including only the routes related to the branch points through which the vehicle passes is displayed on the display screen of the display means together with the current traveling position of the vehicle, so that the route on which the vehicle is traveling and the current traveling position of the vehicle on this route are displayed. When the display form does not change and the display screen of the display means returns to the original display, the current traveling position of the vehicle is not lost and the current traveling position of the vehicle can always be reliably grasped. it can.

According to the invention of claim 2 of the present application, since the route information is displayed on the map including only the routes related to the branch points, the branch point information can be read immediately, and the traveling route at the branch points can be read. You can avoid selection mistakes.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the configuration of an embodiment of a vehicle running guidance device according to the present invention.

The vehicle running guidance device stores a running position detecting device 11 for detecting a current running position of a vehicle (not shown), and image information of a map corresponding to the current running position of the vehicle. The storage device 12 such as a CD-ROM or the like, which emits the branch point information of the branch point located in front of the route on which the vehicle is currently traveling as a radio signal, which has already been described with reference to FIGS. 5 and 6. A micro device that includes a receiving device 13 that receives the radio wave signal from the station and processes an output signal from the traveling position detecting device 11, a map information signal from the storage device 12, and a branch point information signal from the receiving device 13. A central processing unit 14 including a computer or the like is provided.

The position detecting device 11 is a well-known direction detecting device 15 and a well-known distance detecting device 1 such as a vehicle odometer.
6, a primary position detecting device 17 and a GPS
(Global Positioning System) It is used in combination with a secondary position detecting device 18 that uses radio waves emitted from an artificial satellite called a satellite and permitted to be used by the private sector. This is because, in the primary position detecting device 17, the azimuth detecting device 15 has an azimuth detecting error, and the distance detecting device 16 has a constant axle due to changes in tire air pressure, changes in the number of vehicle occupants, and the like. There is a mileage detection error due to the change of the mileage with respect to the number of revolutions, and
In the secondary position detection device 18, the vehicle is a GPS such as a tunnel.
Measures have been taken to prevent the use of radio waves that are permitted to be used by the private sector for undesired purposes other than the original purpose when traveling in a place where satellite radio waves cannot be received. This is because the vehicle position detection accuracy is ensured by using together.

The central processing unit 14 includes an operation switch 1
Necessary from the map information stored in the storage device 12 based on information such as the starting point, the destination, the route from the starting point to the destination, and the current position of the vehicle, which are input by the vehicle driver from 9 Display device 21 such as a CRT display or a liquid crystal display for reading out various map information
The image signal of the map information is output to the display screen of. Upon receiving this image signal, the display device 21 displays a map corresponding to the above map information on its display screen 22 as shown in FIGS. 3 and 4.

The central processing unit 14 also calculates the current position of the vehicle based on the position signal from the position detecting device 11 and outputs the position signal of the vehicle to the display device 21.
In response to this position signal, the display device 21 displays the current traveling position 23 of the vehicle on the map displayed on the display screen 22 as shown in FIGS. 3 and 4.

After the receiving device 13 receives the radio wave signal from the branch point information transmitting station, the central processing unit 14 further allows the driver to confirm the branch point information at least a predetermined distance before the branch point. While necessary, the display of the display device 21 is switched from the state shown in FIG. 3 to the state shown in FIG. 4, and the map including only the routes 25 and 26 related to the branch point 24 ahead of the traveling direction of the vehicle is displayed on the display device 21. Is displayed on the display screen 22 and the route information 27 is displayed. When the vehicle passes through the branch point 24 and passes a certain distance, the central processing unit 14 causes the display unit 21 to
Is again switched from the state shown in FIG. 4 to the state shown in FIG.

Next, with reference to the control flow of the central processing unit 14 shown in FIG. 2, the operation of the vehicle running guidance device of FIG. 1 will be described.

When the control flow starts, the central processing unit 14 executes step S1, and the starting point, the destination, the route from the starting point to the destination, and the current position of the vehicle input from the operation switch 19. The necessary map information is read from the map information stored in the storage device 12 based on the information such as
In addition to displaying the map corresponding to the above map information in 2,
The current position 23 of the vehicle is displayed on the map displayed on the display screen 22 of the display device 11.

After that, the central processing unit 14 executes step S2 to transmit a radio wave signal from the branch point information transmitting station installed in front of the branch point 24 which is located in front of the traveling direction of the route on which the vehicle is currently traveling. It is determined whether or not the signal has been received, and when the receiving device 13 receives the radio signal, step S3.
Is executed to determine whether or not there is branch point information in the radio signal data.

When it is determined in step S2 that the receiving device 13 has not received the radio wave signal, the central processing unit 14 returns to the execution of step S1 again. Further, when it is determined in step S3 that the branch point information is not included in the radio signal data, the central processing unit 14 returns to the execution of step S1 again.

The vehicle enters the reception area of the radio wave signal of the branch point information transmission station located in front of the branch point 24 ahead of the traveling direction, and the receiving device 13 receives the radio wave signal and within the data of the received radio wave signal. When it is determined that there is branch point information, the central processing unit 14 executes step S4, and the display screen 22 of the display device 21 is displayed on the map shown in FIG. As shown in, a map in which lines other than the lines 25 and 26 intersecting at the branch point 24 are deleted is displayed together with the current traveling position 23 of the vehicle.

Next, the central processing unit 14 executes step S5, and as shown in FIG. 4, displays the route information 27 such as the destination name of each branch destination in accordance with the radio signal data.

The display of FIG. 4 is continuously performed at least as long as the occupant needs to confirm the branch point information after the receiving device 13 receives the radio signal from the branch point information transmitting station. ..

Thereafter, the central processing unit 14 executes step S6, determines whether the vehicle has passed the branch point 24, and when it determines that the vehicle has passed the branch point 24, returns to step S2 again. , The display of the display device 21 is returned to the display of FIG.

With such a structure, the vehicle has a branch point 2
When approaching 4, the vehicle position is displayed only in the shape of the branch point 24, and there is no substantial change in the map display form when the vehicle passes through the branch point 24 and before and after the branch point 24. Can be surely grasped.

In the above embodiment, the position detecting device 11
Is the primary position detecting device 17 or the secondary position detecting device 1.
It may be configured by any one of the eight.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a vehicle running guidance device according to the present invention.

FIG. 2 is a flowchart of the operation of the vehicle travel guidance device of FIG.

FIG. 3 is a display screen before the vehicle receives a radio signal at a branch point in the vehicle travel guidance device of FIG. 1.

FIG. 4 is a display screen when the vehicle receives the radio wave signal at the branch point and is switched from the display screen of FIG. 3 in the vehicle travel guidance device of FIG. 1.

FIG. 5 is a display screen before the vehicle receives the radio signal of the branch point in the conventional vehicle travel guidance device.

FIG. 6 is a display screen when the vehicle receives a radio wave signal at a branch point and is switched from the display screen of FIG. 5 in the conventional vehicle travel guidance device.

[Explanation of symbols]

 11 Travel Position Detection Device 12 Storage Device 13 Reception Device 14 Central Processing Unit 15 Direction Detection Device 16 Distance Detection Device 17 Primary Position Detection Device 18 Secondary Position Detection Device 19 Operation Switch 21 Display Device 22 Display Screen 23 Current Travel Position 24 Branch point 25 routes 26 routes 27 route information

Claims (2)

[Claims] 1. A travel position detecting means for detecting a current travel position of a vehicle, and a display means for displaying a map including the current travel position of the vehicle on a display screen, which are displayed on the display screen of the display means. A vehicle travel guidance device for displaying the current traveling position of the vehicle on a map, which is provided in front of the branch point for emitting the branch point information of a branch point in the front of the vehicle in the traveling direction as a radio signal. Branch point information receiving means for receiving the radio signal from the branch point information transmitting station,
A map including only the routes related to the branch point, at least during the time required for the occupant to confirm the branch point information after the branch point information receiving means receives the radio signal from the branch point information transmitting station. And a display changing means for displaying on the display screen of the display means. 2. The vehicle running guidance device according to claim 1, further comprising route information display means for displaying route information on a map including only routes related to the branch point.