JPH0894376A - Running guidance device for vehicle - Google Patents

Abstract

PURPOSE: To make it easy to grasp a recommendation road state by deducing a freeway included in a recommendation road searched from map data, and instructing and indicating the entrance or the exit of the freeway. CONSTITUTION: When a condition of route search is set by input operation from an operator 8, a signal processor 4 sets a present position P of a vehicle on a road map which has been measured by a GPS receiver 3 as a start point at the time, and automatically searches a recommendation road up to a target point O. At the time the signal processor 4 judges whether a freeway is included in the recommendation route CR searched from road map information stored by discrimination between general roads and freeways. In the case where the freeway is included, calculated indication marks of the entrance (IN) and the exit (OUT) of the freeway are shown on the road map shown on a display.

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 identifying and displaying a recommended route connecting a current position of a vehicle on a road map and a destination on a road map displayed on a screen.

[0002]

2. Description of the Related Art Conventionally, based on digital road map data, an optimum recommended route from a starting point set on a road map displayed on a screen to a destination is automatically searched and One has been developed in which the recommended route searched for is identified and displayed on a road map by a specific color or the like so that the vehicle can be guided (for example, JP-A-62-62).
133600 or JP-A-1-173297).

As a method for searching a recommended route based on digital road map data, for example, Dijks
According to a known algorithm such as the tra method, the connection points (nodes) of connected line segments on the digital map are tracked one after another so that the required distance is minimized, and the distance from the starting point to the destination is calculated. The cost of the route from the starting point to the destination (for example, distance, average travel time or a combination thereof, or distance, average travel time and road width, number of right and left turns, traffic) There are various route search methods that minimize the combination of road attributes such as charges).

[0004]

A problem to be solved by the present invention is that in the conventional vehicle guidance system, the recommended route searched is displayed without distinction between the general road and the expressway. That is, it is difficult to grasp the state of the recommended route displayed on the map.

[0005]

The present invention includes a recommended route searched from map data when a recommended route searched for is displayed on a road map projected on a screen in a vehicle guidance system. A means for displaying the designated expressway entrance and exit is displayed on the road map displayed on the screen.

Further, according to the present invention, when the recommended route searched for is identified and displayed on the road map projected on the screen in the vehicle guidance system, a highway is included in the recommended route searched from the map data. After determining that the recommended route is to be followed, the recommended route found is divided into a general road part and an expressway part and sequentially switched, and a means for identifying and displaying on the road map displayed on the screen is taken. ing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of the structure of a vehicle running guidance device according to the present invention. 2, the GPS receiver 3, and the traveling speed detected by the speed sensor 1 are integrated by time to measure the traveling distance of the vehicle, and the two-dimensional coordinates (X The current position on the (Y coordinate) is sequentially obtained by cumulative calculation processing, and the current position of the vehicle on the same coordinate is obtained from the reception data of the GPS receiver 3, and the entire device is centrally controlled. A signal processing device 4 including a CPU, a control ROM and RAM, and an input / output port, which is a microcomputer, and a CD-ROM in which road map information based on digital map data is stored. A map information storage medium 5, a map information reproducing device 6 for selectively reading road map information of a required area from the map information storage medium 5, and a predetermined road map based on the read road map information. And a display device 7 for displaying the current position of the vehicle on the road map displayed on the screen, along with the traveling direction of the vehicle at the current position, as the vehicle travels, Providing to the signal processing device 4 various input instructions such as designation of a road map to be displayed on the display device 7, setting of a destination on the displayed road map, selection switching of a display scale factor, and display command of a traveling locus. It is composed of an operating device 8 capable of performing.

In the present invention, the signal processing device 4 is
It has a function to search the recommended route from the starting point of the vehicle set on the road map to the destination, and a route guidance function to guide the vehicle to the destination according to the searched recommended route. I am trying to hold it.

Now, for example, as shown in FIG. 2, a destination O is set on a road map displayed on the screen by means of a cursor or the like, and then an input operation from the operating device 8 is performed to set the distance and average travel. When the conditions for the route search for minimizing the cost such as time and road width are set, the signal processing device 4 sets the current position P of the vehicle on the road map measured by the GPS receiver 3 as the starting point. After setting, the recommended route to reach the destination O is automatically searched.

In FIG. 2, while the road map displayed on the screen is appropriately scrolled by an input operation from the operating device 8, the destination O is displayed on the road map in another area different from the area where the current position P is present. Shows the case where is set.

When the destination O is set on the road map, under the control of the signal processing device 4, the current position P of the own vehicle and the destination are displayed so as to indicate the direction of the destination O viewed from the current position P of the own vehicle. Ground O
A straight line L connecting with is displayed.

As the search for the recommended route, various conventionally known methods are widely applied.

The starting point on the road map is GP
Even if the automatic setting is performed according to the current position of the vehicle measured by the S receiver 3, the operating device 8
It may be manually set by designating a predetermined position on the road map displayed on the screen by an input operation from.

When the search for the recommended route is completed, as shown in FIG. 3, under the control of the signal processing device 4, the display scale ratio is displayed so that the current position P and the destination O are displayed on the same screen. Is automatically adjusted, and the touch switch SW1 for displaying a route is displayed in the corner of the screen.

When the touch switch SW1 is pressed to give a display command of the searched recommended route, the signal processing device 4 enters the route display mode.

In the route display mode, the signal processing device 4
As shown in FIG. 4, the recommended route CR from the current position P to the destination O is collectively displayed on the road map displayed on the screen by a specific color or brightness modulation. .

In this case, particularly in the present invention, the signal processing device 4
In the case where the highway is included in the searched recommended route CR, it is determined from the road map information that the general road and the highway are stored separately. As shown in FIG. 4, on the road map displayed on the screen, the displayed instruction marks of the entrance (IN) and the exit (OUT) of the expressway guide are displayed.

However, when the searched recommended route CR includes a highway, instruction marks are displayed at the entrance and the exit, so that the traveling order for the recommended route CR becomes easy to understand.

It should be noted that after the search for the recommended route CR is completed, FIG.
When the screen state shown in is displayed, the touch switch S1 for guiding start is pressed without pressing the touch switch SW1 for displaying the route.
When W5 is pressed, the signal processing device 4 does not enter the route display mode, and as shown in FIG. 5, displays the current position P which changes momentarily as the vehicle travels on the road map displayed on the screen. While carrying out, the driving guidance to the destination O is started.

When the route display mode shown in FIG. 4 is entered,
Touch switch SW2 for return is displayed in the corner of the screen,
When the touch switch SW2 is pressed to give a return command to the signal processing device 4, the original display screen shown in FIG. 3 is returned.

Further, particularly in the present invention, the signal processing device 4 determines that the searched recommended route CR includes an expressway, and then, according to the operation procedure, the searched recommended route CR is set to the general road. By switching between the portion and the expressway portion and sequentially switching, a means for reversibly identifying and displaying on the road map projected on the screen is provided.

Specifically, when in the route display mode shown in FIG. 4, a touch switch SW3 for route division display is displayed at the corner of the screen, and the touch switch SW3 is pressed to issue a division display command for the recommended route CR. When given to the signal processing device 4, first, the display state of the screen is as shown in FIG.
The scale is automatically adjusted to the optimum scale, and the screen is switched to the screen displaying the recommended route portion CR1 from the current position P to the entrance of the expressway.

In the display state shown in FIG. 6, when the return touch switch SW2 is pressed and a return instruction is given to the signal processing device 4, the screen returns to the original display state shown in FIG.

Next, in the display state of FIG. 6, when the touch switch SW3 is further pressed, the display state of the screen is changed to that of FIG.
As shown in, the recommended route portion CR2 from the entrance of the highway to the exit of the highway is automatically adjusted to the optimum scale ratio.
Is displayed.

When the display state shown in FIG. 7 is entered, the return touch switch SW2 is pressed to give a return instruction to the signal processing device 4, and the screen returns to the original display state shown in FIG.

Next, when the touch switch SW3 is further pressed in the display state of FIG. 7, the display state of the screen is changed to that of FIG.
As shown in FIG. 5, the screen is automatically adjusted to the optimum scale, and the screen is switched to the screen displaying the recommended route portion CR3 from the exit of the highway to the destination O.

When the display state shown in FIG. 8 is entered, when the return touch switch SW2 is pressed to give a return instruction to the signal processing device 4, the screen returns to the original display state shown in FIG.

Then, when the display state shown in FIG. 8 is entered and the divided display of the recommended route CR is completed, a route guidance touch switch SW4 is displayed at the corner of the screen, and the touch switch SW4 is pressed to signal a route guidance command. When it is given to the processing device 4, the route guidance for guiding the vehicle to the destination O according to the recommended route CR is displayed on the road map displayed on the screen while displaying the current position P which changes every moment as the vehicle travels. Is started.

In the above explanation, when the current position P of the vehicle and the destination O are on the general road, the recommended route portion CR1 from the current position P to the entrance of the highway and the entrance of the highway to its exit The recommended route portion CR2 and the recommended route portion CR3 from the exit of the expressway to the destination O are dividedly displayed on a maximum of three screens.

When the current position P of the vehicle is on the general road and the destination O is on the highway, the recommended route portion from the current position P to the entrance of the highway and the entrance of the highway to the destination The path portion up to O is displayed in a divided manner while being sequentially switched.

When the current position P of the vehicle is on the highway and the destination O is on the general road, the current position P is
To the exit of the expressway and the recommended route part from the exit of the expressway to the destination O are sequentially displayed while being divided.

As described above, when the recommended route CR is displayed on the road map displayed on the screen, the recommended route portion CR1 from the current position P to the entrance of the expressway and the entrance of the expressway according to a predetermined operation procedure. By displaying the recommended route portion CR2 from the exit to the exit thereof and the recommended route portion CR3 from the exit of the expressway to the destination O on a maximum of three screens in a divided manner, the entire process of the recommended route CT becomes easy to understand, This allows the driver to easily understand the driving route of the vehicle.

The signal processing device 4 guides the vehicle to the destination O according to the recommended route CR while displaying the current position P which changes with the traveling of the vehicle on the road map displayed on the screen. In order to perform route guidance, the voice synthesizer 9 is instructed in advance according to the recommended route CR such as guidance for guidance such as turning left or right, branching, or entering an expressway.
Through the speaker 10 to output by voice.

Specifically, for example, it is detected from the map data that the current position P is approaching a predetermined distance before the right turn according to the recommended route CR as the vehicle travels, and the speaker 10 A voice guidance, "Please turn right at the previous intersection," is generated.

FIG. 9 shows a flow of the operation of searching the recommended route described above, displaying the searched recommended route, and guiding the route according to the displayed recommended route to reach the destination. Shows.

FIG. 10 shows details of the operation flow in the route display mode.

[0037]

As described above, according to the present invention, when the recommended route searched is identified and displayed on the road map displayed on the screen, the expressway included in the recommended route searched from the map data is determined. Since the indication of the entrance or exit of the corresponding expressway is displayed on the road map displayed on the screen, the traveling order for the recommended route can be easily understood.

Further, according to the present invention, when the searched recommended route is identified and displayed on the road map displayed on the screen, it is determined that the recommended route searched from the map data includes an expressway. Then, according to the operating procedure, the searched recommended route is divided into the general road part and the expressway part and sequentially switched so that the recommended route is identified and displayed on the road map displayed on the screen. The process becomes easier to understand, and the driver can easily understand the route that the vehicle should drive.

[Brief description of drawings]

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

FIG. 2 is a diagram showing an example of a setting state of a current position as a starting point and a destination on a road map displayed on a screen.

FIG. 3 is a diagram showing an example of a display screen when a search for a recommended route is completed.

FIG. 4 is a diagram showing an example of a batch display screen of recommended routes when the route display mode is entered.

FIG. 5 is a diagram showing an example of a display screen for normal travel guidance.

FIG. 6 is a diagram showing an example of a display screen of a recommended route portion from the current position to the entrance of a highway.

FIG. 7 is a diagram showing an example of a display screen of a recommended route portion from the entrance of the expressway to the exit of the expressway.

FIG. 8 is a diagram showing an example of a display screen of a recommended route portion from an exit of a highway to a destination.

FIG. 9 is a diagram showing an operation flow of the vehicle travel guidance device according to the present invention.

FIG. 10 is a diagram showing details of an operation flow in a route display mode.

[Explanation of symbols]

 1 speed sensor 2 direction sensor 3 GPS receiver 4 signal processing device 5 map information storage medium 6 map information reproducing device 7 display device 8 operating device 9 voice synthesizer 10 speaker

Claims (6)

[Claims] 1. A recommended route from the current position of the vehicle on the road map to a destination set on the road map displayed on the screen is searched based on the map data, and the searched route is searched. In a vehicle drive guidance device that identifies and displays the recommended route on the road map displayed on the screen, the highway included in the recommended route searched from the map data is extracted, and the road map displayed on the screen. A vehicle travel guidance device characterized in that a means for displaying an indication of the entrance or exit of the expressway that has been taken out is provided above. 2. A recommended route from the current position of the vehicle on the road map to the destination set on the road map displayed on the screen is searched based on the map data, and the searched route is searched. In the vehicle driving guidance system that identifies and displays the recommended route on the road map displayed on the screen, after determining that the recommended route searched from the map data includes a highway, the operation procedure According to the above, the guide route for vehicles is characterized in that the searched recommended route is divided into a general road portion and a highway portion and sequentially switched to identify and display on a road map projected on the screen. apparatus. 3. The vehicle travel guidance device according to claim 2, further comprising means for displaying an instruction display of an entrance or exit of a highway included in the recommended route. 4. A route portion from the current position to the entrance of the expressway, a route portion from the entrance to the expressway, when the current position of the vehicle and the destination are on the general road,
The vehicle running guidance device according to the above item 2, wherein the route portion from the exit of the highway to the destination is reversibly displayed while being sequentially switched. 5. A route portion from the current position to the expressway entrance and a route portion from the expressway entrance to the destination when the current position of the vehicle is on a general road and the destination is on the expressway. The vehicle running guidance device according to the above-mentioned item 2, characterized in that the display is reversibly identified and displayed while sequentially switching. 6. A route part from the current position to the exit of the highway and a route part from the exit of the highway to the destination when the current position of the vehicle is on the highway and the destination is on the general road. The vehicle running guidance device according to the above-mentioned item 2, characterized in that the display is reversibly identified and displayed while sequentially switching.