JP2000266559A - Vehicle guidance method for on-vehicle navigator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid risk and congestion at a merging part or an exit by allowing a driver to change a lane from that at a merge side or an exit side to the opposite one with sufficient time. SOLUTION: In the vehicle guidance method, when a vehicle runs on a road MR1 exclusive for automobile driving and approaches a point (a point A1) ahead of the merged part between the road MR1 exclusive for automobile during driving and other roads SR1 exclusive for driving by a certain distance, a navigator guides the approach of the merging part with a voice or displays the enlarged guide picture of the merging part simultaneously for guiding. Also, when the vehicle runs on the road MR1 exclusive for automobile during driving and approaches a point (a point B1) ahead of an interchange IC1 by a specific distance, the navigator guides the approach to the exit with a voice or displays the enlarged guide picture of the exit simultaneously for guiding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle guidance method for a vehicle-mounted navigation device, and more particularly to a vehicle guidance method for a vehicle-mounted navigation device when driving on a motorway.

[0002]

2. Description of the Related Art An in-vehicle navigation device which guides a vehicle so that a driver can easily reach a desired destination detects a position of the vehicle and reads a map around the vehicle position from a CD-ROM or the like. The data is read out, a map image is displayed on the display screen, and a vehicle position mark (own vehicle mark) is displayed at a predetermined position on the map image. Then, as the current position changes due to the movement of the vehicle, the own vehicle mark on the screen is moved, or the own vehicle mark is fixed at a predetermined position such as the center of the screen, and the map is scrolled, so that the vehicle always moves around the vehicle position. Map information can be understood at a glance.

Such an on-vehicle navigation device has a route guidance function of searching for a guidance route from a departure place to a destination, displaying the guidance route on a screen, and guiding the driver to travel. Even when driving (expressway, toll road, etc.), the guidance route is displayed so that it can be distinguished from other roads, and when approaching the target exit, a guide map of the exit (enlarged exit map and arrow indicating the direction of travel) is displayed You will be guided.

[0004]

However, in the conventional on-vehicle navigation system, when the vehicle is traveling on an exclusive road during guidance route guidance, the other roads merge from the left and right of the road on which the vehicle is traveling. There is no guidance of the department,
No guidance other than the intended exit will be provided. Furthermore, the on-vehicle navigation device at the time of non-guide route guidance,
It only displays a map image of the area around the vehicle and does not guide any confluence or exit. If you are driving on a motorway,
To avoid congestion in the merging lane, contact with other vehicles at merging, and congestion in the lane on the exit side, change lanes from the merging lane and the exit lane to the opposite lane. In such a case, most drivers try to change lanes after seeing the signs in front of them and know their existence, but sometimes there is not enough time / distance to change lanes, and sometimes they are overlooked. However, it is easy to cause a collision accident with another vehicle, and it is difficult to change to the opposite lane because of the traffic jam. From the above, the object of the present invention is to inform the driver in advance of the confluence, the existence and the direction of the exit while driving on a motorway, regardless of whether the vehicle is guided or not, It is possible to allow a person to smoothly change lanes from a merging lane or an exit lane to an opposite lane, thereby avoiding danger or congestion at a merging portion or an exit.

[0005]

SUMMARY OF THE INVENTION According to the present invention, when a vehicle approaches a junction with another automobile exclusive road or an exit of an automobile exclusive road, the approach of the junction or the exit is determined. Achieved by voice guidance. Further, according to the present invention, when the own vehicle approaches a junction with another automobile exclusive road or an exit of an automobile exclusive road, an enlarged view of the junction or exit is displayed and guided. Achieved by Further, according to the present invention, when the simplified guide map is displayed, a junction with another motorway, an exit of the motorway is displayed as a facility, and a merging of another motorway is displayed. This is achieved by displaying an arrow indicating the side, exit side. That is, the driver joins the junction,
By knowing the existence and direction of the exit in advance, the lane can be changed to the opposite lane with a sufficient time / distance, so that congestion can be eliminated and the possibility of an accident can be reduced.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (a) Outline of the Present Invention FIG. 1 is a schematic diagram for explaining a first vehicle guidance method according to the present invention. Road, SR1 is another motorway that merges with the running motorway MR1, IC1 is an interchange or ramp of the running motorway MR1, GF1 and VG1 are the running motorway MR1 and the other motorway SR1. And GF2 and VG2 are a display example and a voice guidance example of an enlarged guide map of an exit in the interchange IC1.
When the vehicle travels on the running motorway MR1 and approaches a predetermined distance (point A1) before the junction of the running motorway MR1 and the other motorway SR1, the navigation device guides the junction. Guidance is provided by voice guidance as shown in VG1, and at the same time, an enlarged guide map of the junction is displayed as shown in GF1. While the vehicle is traveling, the vehicle travels on the motorway MR1 and the interchange IC
When the vehicle approaches a predetermined distance (point B1) a predetermined distance from the vehicle, the navigation device provides voice guidance as shown by VG2 at the exit of the interchange IC1 and simultaneously performs G guidance.
As shown in F2, guidance is provided by displaying an enlarged guide map of the exit. By doing so, the driver can know in advance that there is a merging or exit ahead of traveling,
The driver traveling in the lane on the merging side or the exit side can make a lane change with a margin in front.

FIG. 2 is a schematic diagram for explaining a second vehicle guidance method according to the present invention, wherein CM2 is the position of the own vehicle, MR2 is a motorway dedicated to the vehicle, IC2 and IC3 are motorways dedicated to the running vehicle. Interchange or ramp of MR2,
SR2 and SR3 are other motorways that merge with the motorway MR1 while traveling, PA2 is a parking area,
SA2 is a service area, DP is a display device in the navigation device, and SG1 to 3 are simple guide maps displayed at predetermined positions on the screen of the display device DP while the vehicle is traveling and traveling on the motorway MR2. For example, in the simplified guide map SG1, the exit A at the interchange IC2, the junction B of the running car exclusive road MR2 with another car exclusive road SR2, the parking area PA, the interchange IC3
It is a simple guide map showing that the facility of exit D in exists. Further, the arrow display at the exit A of the simplified guide map SG1 indicates that there is the exit A of the interchange IC2 on the right, and the arrow display at the junction B merges from the left with the other motorway SR2 to the motorway MR2 while the other motorway SR2 is running. Indicates that When the vehicle starts traveling on the motorway MR2 while the vehicle is traveling, the navigation device displays the simple guide map SG1.
Is displayed on the screen of the display device DP, and when the vehicle passes through the interchange IC2, the display of the simple guide map SG1 is switched to the display of the simple guide map SG2. Next, when the vehicle passes the junction B, the display of the simple guide map SG2 is switched to the display of the simple guide map SG3. That is, the navigation device guides the driver by displaying the latest simplified guide map in accordance with the traveling of the vehicle. By doing so, the driver can always know the information of the facility ahead in which the vehicle is traveling, and can take measures such as changing lanes in advance.

(B) Configuration of Navigation Apparatus FIG. 3 is a configuration diagram of a navigation apparatus according to the present invention.
1 is a storage medium such as a CD-ROM or a DVD-ROM for storing map information, merging / exit information of a motorway, and facility information. 12 is a CD-ROM control for controlling reading of map information and the like from the storage medium 11. Reference numeral 13 denotes a position measuring device that measures the current position of the vehicle, and includes a vehicle speed sensor that detects a moving distance, a gyro that detects a moving direction, a position calculation CPU, a GPS receiver, and the like. 14
Is a map information memory for storing map information and the like read from the storage medium 11, 15 is a remote controller for performing menu selection operation, enlargement / reduction operation, cursor movement (map scroll) operation, destination input operation, etc., 16 is a remote control interface is there. 17 is a processor (CPU) for controlling the entire navigation, 18 is a ROM for storing various programs such as an optimal route search control to the destination, 19 is a RAM for storing processing results and the like, and 20 is a map image based on map information. And a display controller that generates an image of an enlarged guide map of the merging or exit based on the merging / exit information of the motorway, and a simplified guide map based on the facility information of the motorway. , 21
Is a VRAM that synthesizes and stores the above images, 22 is a display device, 23 is a voice generator that generates voice guidance based on the merging / exit information of the motorway, and 24 is a voice generator that outputs voice guidance. Speaker 25, and bus 25.

(C) Merging / Exit Information Database for Automobile Roads FIG. 4 is a diagram showing a merging / exit information database for automobile exclusive roads for realizing the first vehicle guidance method of the present invention. The name of the merging point and the name of the exit, the longitude and latitude of the merging point and the exit, and the contents of the merging / exit at that time are stored for each motorway in the storage medium 11. The guidance content includes information for selecting a voice guidance and an enlarged guide map corresponding to the merge / exit.

FIG. 5 is a diagram showing guidance contents at the merging / exit point shown in FIG. 4 and showing an example of guidance voice at a merging or exit point of a motorway and a display example of an enlarged guide map. (A) is a guidance voice and an enlarged guide map when another road merges from the left side of the road on which the own vehicle runs, and (b) is a guide when another road merges from the right side of the road on which the own vehicle runs. (C) is a guidance voice and an enlarged guide map when there is a motorway exit on the left side, and (d) is a guidance voice and an enlargement guide map when there is a motorway exit on the right side. is there.

(D) Processing flow of the first vehicle guidance method of the present invention FIG. 6 is a diagram showing the processing flow of the first vehicle guidance method of the present invention. The CPU 17 confirms from the vehicle current position data of the position measuring device 13 whether or not the road on which the own vehicle is traveling is a motorway (step 101). If the road is not a motorway, the process returns to step 101. If the running road is a motorway, the CPU 17 instructs the CD-ROM control unit 12 to read the merging / exit information of the motorway. As a result, the CD-ROM control unit 12 reads the merging / exit information of the driving car road from the storage medium 11 and stores it in the map information memory 14 (step 10).
2). Next, the CPU 17 monitors the position of the own vehicle from the current vehicle position data of the position measuring device 13 and determines whether or not the own vehicle has approached a predetermined distance before the converging / exiting of the exclusive motorway stored in the map information memory 14. Confirm (Step 10
3). If not, the process returns to step 103 to continue monitoring, and if approached, the CPU 17 instructs the voice generation unit 23 to output voice guidance. Thereby, the voice generating unit 23 generates voice guidance of the merging or exit based on the merging / exit information of the motorway, and outputs the voice guidance from the speaker 24. Also, CP
U17 joins the display controller 20 at the same time.
Instruct the exit guidance display. As a result, the display controller 20 generates a predetermined enlarged guide map image and
It is displayed on the display 22 via M21 (step 104). Next, the CPU 17 checks whether or not the own vehicle has passed through the junction or the exit from the vehicle current position data of the position measuring device 13 (step 105). If it does not pass, an enlarged guide map of the merge or exit is displayed until it passes, and if it passes, the enlarged guide map of the merge or exit is deleted (step 1).
06). Thereafter, the navigation device monitors the position of the own vehicle until approaching the next junction or exit.

FIG. 7 is a diagram showing a facility information database of a motorway for realizing the second embodiment of the present invention. It is composed of a facility name, a latitude and longitude of the facility, and a left-right direction indicating a position of the facility as viewed from a road on which the vehicle runs, for each motorway,
It is stored in the storage medium 11.

(F) Processing Flow of Second Vehicle Guide Method of the Present Invention FIG. 8 is a diagram showing a processing flow of the second vehicle guide method of the present invention. The CPU 17 confirms from the vehicle current position data of the position measuring device 13 whether or not the road on which the own vehicle is traveling is a motorway (step 201). If the road is not a motorway, the process returns to step 201. If the running road is a motorway, the CPU 17 instructs the CD-ROM control unit 12 to read facility information of the motorway. Thereby, the CD-ROM control unit 12 stores the storage medium 11
, The facility information of the dedicated motorway is read and stored in the map information memory 14 (step 202). CPU
17 instructs the display controller 20 to display a simple guide. Thereby, the display controller 20
Is a predetermined number of facility names and arrows in the order of proximity to the own vehicle, as shown in a simplified guide map SG1 in FIG. Generates a simple guide map image by display and generates VRAM2
1 on the display 22 (step 20).
3). Next, the CPU 17 checks whether or not the vehicle has passed the facility located in the forefront in the simplified guide map based on the vehicle current position data of the position measuring device 13 (step 204). If not passed, return to step 204, if passed, CPU
17 instructs the display controller 20 to display the next simple guidance. Thereby, the display controller 20 can display the simplified guide map S of FIG. 2 based on the facility information of the motorway and the own vehicle position stored in the map information memory 14.
As shown in G2, a simplified guide map image including information one point ahead of the simplified guide map SG1 is generated and displayed on the display 22 via the VRAM 21 (step 205). Thereafter, each time the vehicle passes through the facility, the navigation device updates the simplified guide map.

[0014]

As described above, according to the present invention, the driver can always know beforehand the information on the merging / exiting point when driving on the motorway, and the lane from the merging side or the exit side to the opposite lane with a margin. You can make changes. In addition, this can eliminate congestion near the junction or exit,
Contact accidents with other vehicles at the time of merging can be reduced.

[Brief description of the drawings]

FIG. 1 is a first schematic explanatory diagram of the present invention.

FIG. 2 is a second schematic explanatory diagram of the present invention.

FIG. 3 is a diagram showing a configuration of a navigation device of the present invention.

FIG. 4 is a diagram showing a merging / exit information database for a motorway of the present invention.

FIG. 5 is a diagram showing an example of guidance voice and a display example of an enlarged guide map at a junction or an exit of a motorway according to the present invention.

FIG. 6 is a diagram showing a processing flow of a first vehicle guidance method of the present invention.

FIG. 7 is a diagram showing a facility information database for a motorway of the present invention.

FIG. 8 is a diagram showing a processing flow of a second vehicle guidance method of the present invention.

[Explanation of symbols]

 CM1 ··· Car location MR1 ·········································································································································

Claims (3)

[Claims] 1. A vehicle guidance method for an on-vehicle navigation device when driving on an automobile freeway, wherein when the own vehicle approaches a junction with another automobile exclusive road or an exit of an automobile exclusive road, the junction or exit is provided. A vehicle guidance method for an on-vehicle navigation device, which provides voice guidance of approach of a vehicle. 2. When an own vehicle approaches a junction with another automobile exclusive road or an exit of an automobile exclusive road, an enlarged view of the junction or the exit is displayed to provide guidance. 2. A vehicle guidance method for an in-vehicle navigation device according to claim 1. 3. A vehicle guidance method for an in-vehicle navigation device for displaying, on a display screen, a simplified guide map that displays a predetermined number of facilities existing along a motorway on which the vehicle is traveling, starting from the closest one. A vehicle with a vehicle-mounted navigation device, which displays a junction with another motorway and an exit of the motorway as a facility, and displays arrows indicating the merging side and the exit side of the other motorway. How to guide.